Tobacco field tectorial membrane device

The utility model relates to a tectorial membrane device especially relates to tobacco field tectorial membrane device, including the main support, the front end both sides of main support are equipped with the digger plough respectively, and the rear end both sides of main support are equipped with the trailing bar respectively, still include membrane roller mounting bracket, membrane roller mounting bracket includes that two install heads, and the rotation of membrane roller is installed in two installations overheadly, and the installation head is fixed on the stand pipe of vertical setting, is equipped with the guide bar in the stand pipe, and the upper end of guide bar is fixed on the main support, and the guide bar still overlaps outward and is equipped with regulating spring, and regulating spring's upper end is fixed on the main support, and regulating spring's lower extreme and stand pipe are connected, be equipped with two guide rolls on being located the main support between ...

Odor-absorption deodorizing PVC film

The invention relates to an odor-absorption deodorizing PVC film, which comprises the following components by weight: 60-70% of PVC resin powder, 10-15% of environmental protection plasticizer, 2-3% of barium zinc stabilizing agent, 8-15% of filler and pigment, 0.5-1% of auxiliary agent and 2-8% of white active carbon. The PVC film provided by the invention solves the application defects of poor environmental protection performance of a traditional film DOP plasticizer, easy migration generation due to little plasticizer molecular chain and single function.

Direct-current single-pole ground fault determination method of flexible direct-current power transmission system

The invention discloses a direct-current single-pole ground fault determination method of a flexible direct-current power transmission system. Voltages to ground of positive and negative direct-current buses of a direct-current side are obtained; if an absolute value of one voltage value is less than a low-voltage limiting value and an absolute value of the other voltage value is larger than a high-voltage limiting value and a condition that duration time is larger than a set screening time is met, a single-pole ground fault is determined to occur in a direct-current bus corresponding to the voltage value with the absolute value less than the low-voltage limiting value. According to the invention, on the basis of the changing feature of the voltage during the direct-current single-pole ground fault development process, the voltages to ground of the positive and negative direct-current buses are selected as direct-current single-pole ground fault identification parameters. Besides, overtime ...

Application of oxidized low density lipoprotein for inducing mesenchymal stem cell to differentiate to myocardium-like cell

The invention provides application of oxidized low density lipoprotein for inducing mesenchymal stem cells to differentiate to myocardium-like cells. The experiment shows that when oxidized low density lipoprotein with concentration of 5 micrograms/mL is added into a culture medium of mesenchymal stem cells, BMMSCs have remarkable cell proliferation, the expression of myocardium-like cell specific protein and myocardium cell indicative molecules can be detected, which means that the mesenchymal stem cells are directionally differentiated to myocardium-like cells, and the conversion rate of the myocardium-like cells is as high as 30%.

Production for preparing special fertilizer for peas from diammonium hydrogen phosphate byproduct

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for preparing special fertilizer for peas from a diammonium hydrogen phosphate byproduct. According to the method, the requirement for nutrient elements of the special fertilizer for peas is analyzed, the defect in the process for preparing a diammonium hydrogen phosphate product is combined, and the process for preparing the diammonium hydrogen phosphate product and the process for preparing the special fertilizer for peas are combined, so that the two processes are supplemented, wastage rate of nitrogen phosphor and waste liquid emission in the process for preparing the diammonium hydrogen phosphate product can be reduced, and the production cost of the diammonium hydrogen phosphate product can be reduced; and parameters of the process steps are controlled, so that the purity of the prepared diammonium hydrogen phosphate product can be 96 percent, and an effective special ...

Flow control jar

The utility model provides a flow control jar, including the agitator tank of storage tank and setting top in the storage tank, the discharge gate has been seted up to the bottom of storage tank, installs the rabbling mechanism in the agitator tank, and the pay -off mouth has been seted up to the bottom of agitator tank. Flow control jar through setting up miniature agitator tank in the storage tank, material that the stirring is good can ceaselessly flow in to the storage tank in, makes things convenient for taking of in storage tank material to when the storage tank internal management is expected, can be not in the agitator tank stirring material with stopping, realize especially when the storage tank internal cavity, shifting to an earlier date material mixing's continuity and to open earlier the agitator tank stirring, so that a large amount of material of storage tank domestic demand sufficient reserve material occasionally. And through built -in miniature agitator tank, to material ...

Baking process for intensive baking room

The invention discloses a baking process for an intensive baking room. A comb type cigarette clamp is adopted for installing cigarettes, and ten temperature and humidity accurate control points are set. According to the technical scheme, operation is easy and safe, the baking process is quantized accurately, baking loss caused by human baking errors is greatly reduced, the baking step is simplified, automatic baking can be achieved by setting the dry-bulb temperatures, the wet-bulb temperatures, the temperature increase speed and the temperature stabilization time of ten key temperature points and the parameters of the air speed of a fan in the baking process, and therefore the operability is high and the labor cost is saved. Meanwhile, the baking quality of tobacco is improved through accurate control of the dry-bulb temperatures, the wet-bulb temperatures, the temperature increase speed, the temperature stabilization time and the parameters of the air speed of the fan, and the baked tobacco ...

Fermentation bed for rabbit breeding

The utility model discloses a fermentation bed for rabbit breeding, including breeding the room, the water delivery person in charge and delivery pipe branch, the top in breed room is fixed all aroundand is equipped with the lateral wall, the fixed roof that is equipped with in top of lateral wall, it is equipped with ventilative fan to fix on the lateral wall, the fixed rabbit breeding fermentation bed that is equipped with in both sides in room breeds, rabbit breeding fermentation bed is hugging closely the lateral wall, rabbit breeding fermentation bed's top is equipped with vegetables andcultivates the layer, vegetables are cultivateed the layer and fix the top at rabbit breeding fermentation bed through the stand, rabbit breeding fermentation bed's the fixed sprinkling machine thatis equipped with in top, the pipe connection water delivery of passing through of sprinkling machine is responsible for, the last fixed isolated column that is equipped with of rabbit breeding fermentation ...

Pin shaft hoisting device

The utility model relates to a pin shaft hoisting device. The pin shaft hoisting device is characterized in that a drum mechanism is fixed with one end of a steel wire rope; an output shaft of the power device is fixedly connected with the drum mechanism; a first through hole is formed in the side surface of the fixed disc; a second through hole corresponding to the first through hole is formed in the side face of the fixing frame assembly, a containing space for containing the power device is formed in the fixing frame assembly, the power device is arranged in the containing space, and an output shaft of the power device penetrates through the first through hole and the second through hole and is fixedly connected with an external drum mechanism. The fixing frame assembly is further fixedly connected with an external lifting frame lifting part. According to the utility model, one end of the steel wire rope is wound on the rotary drum mechanism, then the pin shaft to be hoisted is wound ...

High-titer Porcine circovirus 2-type cultured cell, preparation method and use thereof

The invention relates to a high-titer Porcine circovirus 2-type (PCV2) cultured cell, a preparation method and use thereof, belonging to the biotechnology field. In order to obtain a PK15 being capable of stably producing high-titer PCV2, the continuous cell clone and subclone are carried out after the limiting dilution is carried out on a PK15 mother cell, and then IFA screening is utilized to obtain a PK15-B1 cell line having high sensitivity to PCV2. The cell line has stable biological characteristics and has no exogenous microbe pollution. The cell is cultured at the temperature of 37 DEGC for 3-4 days after being inoculated with 100TCID50/ml PCV2, and the virus titer reaches 10<7.0>TCID50/ml which is 100 times higher than that of a virus titer being inoculated with PK15, showing thatthe PK15-B1 cell line is more sensitive to PCV2 and being more beneficial to copying PCV2. The screened PK15-B1 clone cell strain and the high-titer PCV2 preparation method can be used for research of PCV2 ...

Diagnostic fault design and data coupling system based on ADAS product integrated architecture

The invention discloses a diagnosis fault design and data coupling system based on an ADAS product integrated architecture, comprising a UDS service module and a UDS TP data transmission management module which are divided based on a UDS unified diagnosis service module, and an Event module and a Fault module which are divided based on a DEM diagnosis event management module, the UDS service module is used for managing various diagnosis services; the UDS TP data transmission management module is used for carrying out data processing on physical addressing, functional addressing, a single frame and multiple frames to ensure that the receiving and sending processes of diagnosis messages are normal; the Event module, namely a diagnosis event module, is used for diagnosing association between an event and a DTC fault code and setting the DTC diagnosis fault code after a fault occurs; and the Fault module, namely a fault diagnosis module, is used for determining the fault before the occurrence ...

Test fixture that spring probe freely removed enables

The utility model discloses a test fixture that spring probe freely removed enables. The utility model discloses a setting up and controlling slide subassembly, front and back slide subassembly and upper and lower freely removal of adjusting part realization spring probe from top to bottom all around, the device simple structure just makes low cost.

Method for preparing transparent friction particle

The invention provides a preparation method of transparent friction particles that has low cost, high conversion rate and yield. The steps are as follows: (1) nano silicon dioxide gel is prepared through reaction by mixing silica source and dilute acid; (2) alcogel is got by replacing hydrogel with ethanol and then is centrifugally separated, dried, shaped and sieved. Colorful transparent friction particles can also be prepared by the following steps: (1) silica source and dilute acid are reacted, well dispersed pigment solution is added during the process of stirring, reaction is continued until nano silicon dioxide gel is produced; (2) alcogel is got by replacing hydrogel with ethanol and the particles are obtained after centrifugally separating, drying, shaping and sieving. The invention can prepare colorless transparent friction particles, more particularly, colorful transparent friction particles, and has the advantages of simple technique, high yield, low cost and good transparency ...

Subsides of impressed watermark glue film automobile body

Subsides of impressed watermark glue film automobile body, including substrate, glue film, antiseized layer, its characterized in that the glue film is the plane with the one side that the substrate was laminated mutually, the glue film is the impressed watermark face with the one side of laminating mutually in antiseized layer, the impressed watermark face comprises a plurality of impressed watermarks that have regular shape, the impressed watermark is positive line, the whole thickness of glue film is 0.01~1.0mm, the height of impressed watermark is 0.01~1.0mm, the shape of impressed watermark can be for circular or square or hexagon or pentagon or triangle -shaped or rectangular shape, subsides of impressed watermark glue film automobile body have good in air discharge performance, canquick exhaust during the pad pasting, periodical about convenient.

Forage grass drying device

The utility model discloses a forage grass drying device, including stoving case, action wheel, discharge gate and air heater, the downside of stoving case is provided with the base, and dries the upper end of case and be connected with the pan feeding mouth, the action wheel is connected with the motor, and the upside of action wheel is provided with from the driving wheel, the action wheel and from the driving wheel all around around there being the conveyer belt, and the conveyer belt be fixed with the hopper on the surface, the outer end of hopper is provided with the baffle, the dischargegate sets up in the bottom of stoving case, and the downside of discharge gate is provided with the material case, the air heater sets up the right side at the stoving case. This forage grass dryingdevice is provided with two sets of action wheels, from driving wheel, conveyer belt and hopper, like this at the in -process of drying, can drive the bottom of forage grass from the stoving case to the ...

A feeding device for rabbit breeding

The utility model discloses a feeding device for rabbit breeding, including casing, sieve and universal wheel, the casing upper end is equipped with the motor, and the motor lower extreme is connectedwith a belt pulley of being connected through fixed axle and shells inner wall through the connecting axle. Beneficial effect: among the utility model, this a feeding device for rabbit breeding comesto discharge the fodder in the casing through the discharge gate according to quantity through setting up sieve tight pulley and the sieve be connected with motor drive, a plurality of empirical formulas are observed, an amount of fodder can be deposited in clearance between the sieve, then discharge the fodder in the clearance through rotatory, because its power is provided by the motor, and themotor is controlled by flush mounting plate of switch, so the user can control the output and the exhaust velocity of fodder through flush mounting plate of switch, the user can also utilize the telescopic ...

Abandonment tobacco leaf rubbing crusher

The utility model discloses an abandonment tobacco leaf rubbing crusher, including the frame, fixedly connected with smashes the host computer in the frame, is connected with driving motor on the crushing host computer, and the below of smashing the host computer is equipped with the discharge gate, and discharge gate department is equipped with out the hopper, and the top of smashing the host computer is equipped with the feed inlet, and the feed inlet play is equipped with feed hopper, crushing host computer includes the casing, has the cutting room in the casing, cuts indoor rotation and is connected with and moves the knife tackle, cuts indoor still fixedly connected with stationary knife group, the utility model adopts the above technical scheme, discarded tobacco leaf is smashed the tobacco leaf through cutting and the shear effect who moves knife tackle and stationary knife group, and the closed angle that forms through the cutting face and the back can tear the tobacco leaf to shreds ...

Insecticidal device is planted to sweet potato

The utility model discloses an insecticidal device is planted to sweet potato, including concrete floor, main wedge, slider and funnel, open the bottom of concrete floor has the slide rail, main wedgeruns through from the inside of concrete floor through the mounting groove, the bottom at the telescopic link is fixed to the slider, medicament groove's upper end is provided with the injection mouth, the outer surface mounting who spouts the dish has the insecticidal lamp, and the outside of insecticidal lamp evenly is provided with spray head port, spray head port's outside threaded connectionhas the shower nozzle, the internally mounted of insecticidal lamp has the fluorescent tube, the lower extreme at the insecticidal lamp is installed to the funnel. This insecticidal device is plantedto sweet potato has avoided the method of pesticide insecticidal in the existing market, adopt the medicament to spray and attract the pest to sweet potato planting department, thereby it then can beclose ...

AC servo driver with intelligence function of releasing

The utility model discloses a AC servo driver with intelligence function of releasing mainly includes electric network source input, motor link, dc -to -ac converter, generating line sampling circuit and corresponds the circuit of releasing that generating line sampling circuit set up, and generating line sampling circuit is including the rectifier bridge, with BUS capacitors and the generating line that the rectifier bridge switched on, the generating line through the divider resistance subassembly with release the line connection, the circuit of releasing is including switching on switch, bleeder pipe and drain resistor, still is equipped with voltage comparater and CPLD control assembly at divider resistance between the circuit with releasing, thereby its CPLD control assembly is through the voltage ratio of receiving voltage comparater and conveying than the control of signal to switching on the switch and switching on and open circuit. This AC servo driver with intelligence function ...

Preparation method and applications of cosmetic suspended particles

The invention relates to a preparation method of cosmetic suspended particles. The preparation method comprises the following steps: 1) putting a sulfuric acid solution with free acid concentration of 0.3-0.6mol/L into a container, and controlling the temperature at 20-40DEG C; 2) adding a sodium silicate solution with free alkali concentration of 0.3-0.6mol/L while stirring; 3) when the pH value achieves 3.8-4.2, stopping adding the sodium silicate solution, and adding ethylene cellulose or PE (polyethylene) powder; 4) continuously adding the sodium silicate solution with free alkali concentration of 0.3-0.6mol/L while stirring until the pH value reaches 4.8-5.0; 5) continuously stirring for 1-2 hours; and 6) drying and screening. The preparation method is simple in technique, free from mechanical pulverization, the shapes of the prepared suspended particles are relatively regular, and the prepared suspended particles can be suspended in a 70% sorbitol solution.

Abandonment tobacco leaf integrated treatment machine

The utility model discloses an abandonment tobacco leaf rubbing crusher, including the frame, fixedly connected with smashes the host computer in the frame, is connected with driving motor on the crushing host computer, and the below of smashing the host computer is equipped with the discharge gate, and discharge gate department is equipped with out the hopper, and the top of smashing the host computer is equipped with the feed inlet, and the feed inlet play is equipped with feed hopper, crushing host computer includes the casing, has the cutting room in the casing, cuts indoor rotation and is connected with and moves the knife tackle, cuts indoor still fixedly connected with stationary knife group, the utility model adopts the above technical scheme, discarded tobacco leaf is smashed the tobacco leaf through cutting and the shear effect who moves knife tackle and stationary knife group, and the closed angle that forms through the cutting face and the back can tear the tobacco leaf to shreds ...

Heavy -calibre well embeds hanging scaffold

The utility model relates to a heavy -calibre well embeds hanging scaffold, including setting up below the well head three horizontally rigidity platform and a template layer rigidity platform of 3-5 meters, template layer rigidity platform sets up on the rigidity platform, the rigidity platform is equipped with pre -buried a set of pipe with the wall of a well and fixes. The utility model discloses compare in traditional scaffold braced system, hanging scaffold braced system practices thrift more than 50% in the consumption of NULL, duration of a project, manpower etc. And the well is darker, the bore is big more, and the saving degree is high more, the safe risk greatly reduced of construction, and the improvement efficiency of construction has better economic benefits.

Smoking machine trap leak hunting device

The utility model relates to a leak test device, concretely relates to smoking machine trap leak hunting device. The device connects a vacuum negative pressure table at hose of external connection of the passageway front end of trap, the other end of hose, the hose all is equipped with the sealing member with the passageway front end junction of trap and the junction of hose and vacuum negative pressure table. The utility model discloses can check the sealing performance of all traps one by one, the loss that leads to the fact when preventing the collection of flue gas component avoids the flue gas to detect volatilizing of component and scatter and disappear, and further the accuracy of improvement experiment testing result has certain value of using widely.

Mining belt conveyor coal amount detection method based on binocular stereo vision depth perception

A mining belt conveyor coal amount detection method based on binocular vision depth perception is provided. A speed sensor is installed on a belt conveyor to collect speed signals of a conveying belt in real time and transmit the signals to a host computer. Two parallelly placed cameras are installed above the conveying belt to collect conveyed coal material images in real time and transmit the images to the host computer for image analysis and processing. The specific steps are as follows: a multi-resolution wavelet transform algorithm is used to enhance the conveyed coal material images, and a K-means clustering algorithm is combined to segment the images only with the coal material; a binocular vision method is used to acquire three-dimensional point cloud information of the coal material; and a Delaunay algorithm is used to calculate an initial volume of the conveyed coal material, a T-S fuzzy logical reasoning method is combined to correct the volume of the conveyed coal material, ...

Federal learning incentive mechanism method considering multi-server competition

The invention discloses a federated learning incentive mechanism method considering multi-server competition, and the method comprises the steps: carrying out the initialization of all parameter servers, building a global model of federated learning, and issuing a training task of federated learning to a user; the user submits own quotation for the federal learning training task issued by each server according to own conditions; the parameter server determines a winning set and the rewards required to be paid by the users participating in the training according to a self-adaptive multi-item auction algorithm; training is carried out according to the federal learning step, the parameter server distributes a global model to the users in the winning set, and the users carry out local training and upload parameter updating to the parameter server; after training is finished, the parameter server performs model aggregation on the parameters uploaded by the user, and the parameters of the global ...

Mobile terminal and junk information effectively filtering method and device thereof

The invention discloses a mobile terminal and a junk information effectively filtering method and device thereof and belongs to the technical field of mobile terminals. The junk information effectively filtering method comprises, when a message is received, obtaining the content of the received message; converting characters inside the message content into pinyin letters; performing semantic analysis on the converted pinyin letters through an input method word library; according to the result of the semantic analysis, determining whether the message content is junk, and if so, filtering out the message content. The junk information effectively filtering method can effectively filter junk messages by converting the received message content into the pinyin letters and then determining whether the received message is a junk message according to the semantic analysis on the pinyin letters.

Balance control method for voltage source type symmetric bipolar converters

The invention relates to a balance control method for voltage source type symmetric bipolar converters, which controls an anode converter and a cathode converter respectively; neutral current closed-loop control, which takes zero neutral current as a control target and adopts a neutral current sampling value as feedback to perform PI control, is added; the output of the neutral current closed-loop control is used for overlapping commands of active power related control in anode and/or cathode control. The balance control method for the voltage source type symmetric bipolar converters provided by the invention presets a neutral current command to be zero through the balance control closed-loop, and achieves closed-loop control of the neutral current through PI control by making difference with the sampling value. The harm of ground loop operation is avoided; and as for a metal loop type system, by adopting the balance control method provided by the invention, converter system loss can be ...

Preparation method of beer silica gel

The invention relates to a preparation method of beer silica gel, which comprises the following steps: 1) uniformly mixing glycerol and water in a mass ratio of 1:(20-200); 2) taking V1L of the glycerol-water mixed solution obtained in the step 1), adding a 1.0-1.2 mol/L sodium silicate solution under stirring conditions, regulating the pH value of mixed solution to 8-10, adding sodium silicate and a sulfuric acid solution, and keeping the pH value of the mixed solution at 8-10 until the total volume of the sodium silicate solution is V2L, wherein V1=V2; 3) continuing adding the sulfuric acid solution until the pH value of the mixed solution is 2-3; 4) stirring, and aging; and 5) washing, drying and pulverizing to obtain the beer silica gel. The preparation method has the advantages of simple production technique, fewer steps and fewer added assistants, and is suitable for workshop production. The silica gel prepared by the preparation method has the advantages of large pore volume, large ...

High-voltage cable box culvert crossing deep foundation pit suspension protection device and protection method thereof

The invention belongs to the technical field of municipal construction, and particularly relates to a suspension protection device for a high-voltage cable box culvert to stretch across a deep foundation pit and a protection method of the suspension protection device. The suspension protection device for the high-voltage cable box culvert crossing the deep foundation pit comprises reinforced concrete supporting beams, SMW construction method piles, upper H-shaped steel sheets, finish rolling threaded rods, grouting pipes, reinforcing meshes, 22a I-shaped steel and lower H-shaped steel sheets. According to the technical means, the problem that when the cable box culvert stretches across the deep foundation pit, an enclosure structure cannot be closed is perfectly solved, meanwhile, it is guaranteed that the cable can still work normally during foundation pit operation, the construction period is shortened, and cost is saved.

Special fertilizer for producing organic tobacco leaves

The invention discloses a special fertilizer for producing organic tobacco leaves. The special fertilizer is prepared from the following raw materials in percentage by weight: 14-16 percent of rapeseed cake, 31-33 percent of bone meal, 27-29 percent of sesame cake, 12-14 percent of alcohol slag, 4-6 percent of yeast powder and 6-8 percent of hoof and horn particles, wherein the total content of N, P2O5 and K2O is no less than 12 percent and the content of organic matter is no less than 40 percent. With the adoption of the technical scheme, the special fertilizer has high organic matter content, contains grease, has long-lasting fertilizer efficiency, is capable of improving soil; nitrogen, phosphorus and potassium are all from animals and plants and inorganic chemical components are not contained; and based on a scientific formula, each organic material can take full effect; and the special fertilizer meets the production needs of the organic tobacco leaves and is capable of promoting the ...

Method for preparing special compound fertilizer for eucalyptus from monopotassium phosphate byproducts

The invention discloses a method for preparing a special compound fertilizer for eucalyptus from monopotassium phosphate byproducts. The method comprises the following steps of raw material preparation, monopotassium phosphate preparation, filtrate element addition and drying. Monopotassium phosphate is prepared through reaction between phosphoric acid and urea, so that the problem that impurities are generated when monopotassium phosphate is prepared from phosphoric acid by using the traditional wet process is solved; by using the method, high-purity monopotassium phosphate can be prepared, and meanwhile, the rest slurry can be prepared into the special compound fertilizer for the eucalyptus through the processes such as element addition, drying and the like, so that a mother solution is sufficiently utilized, and the cost is reduced; and the chemical compound fertilizer prepared according to research and analysis on the content of elements required by the eucalyptus and the absorption ...

High-titer Porcine circovirus 2-type cultured cell, preparation method and use thereof

The invention relates to a high-titer Porcine circovirus 2-type (PCV2) cultured cell, a preparation method and use thereof, belonging to the biotechnology field. In order to obtain a PK15 being capable of stably producing high-titer PCV2, the continuous cell clone and subclone are carried out after the limiting dilution is carried out on a PK15 mother cell, and then IFA screening is utilized to obtain a PK15-B1 cell line having high sensitivity to PCV2. The cell line has stable biological characteristics and has no exogenous microbe pollution. The cell is cultured at the temperature of 37 DEGC for 3-4 days after being inoculated with 100TCID50/ml PCV2, and the virus titer reaches 10<7.0>TCID50/ml which is 100 times higher than that of a virus titer being inoculated with PK15, showing that the PK15-B1 cell line is more sensitive to PCV2 and being more beneficial to copying PCV2. The screened PK15-B1 clone cell strain and the high-titer PCV2 preparation method can be used for research of ...

Ring playing method and device and mobile terminal

The invention discloses a ring playing method and device and a mobile terminal, and belongs to the technical field of mobile terminals. The method comprises the steps that information is received; whether an individualized ring function is opened or not is judged; when the individualized ring function is opened, key words of the content of the information are extracted, and a corresponding individualized ring is determined according to the key words; when the individualized ring function is not opened, a default information ring is used; the determined ring is played. By means of the ring playing method and device and the mobile terminal, the key words of the content of the information are extracted, the individualized ring relevant to the content of the information is determined according to the key words, in this way, the diversification and the intelligence of the ring of the information are achieved, the individualized needs of mass users are met, and the using interestingness of the ...

Manufacturing method of outer framework filling type ice sculpture and snow sculpture

The invention discloses an outer skeleton filling type ice sculpture and snow sculpture manufacturing method which comprises the steps that material selection, raw material preparation and manufacturing are conducted one by one, a nylon net is used for conducting external coating, a skeleton is used as a support, snow is filled in the skeleton, cold water spraying operation is conducted repeatedly in the manufacturing process, and certain practicability and functionality are achieved technically. The ice sculpture is high in practicability and functionality and can be widely applied to the technical field of ice sculpture manufacturing.

Preparation method of polyimide resin solution

The invention provides a preparation method of a PMR type polyimide resin solution, which comprises the step of preparing the polyimide resin solution through a PMR (monomer reactant polymerization) method by taking a large-group alcohol solvent as an esterification reagent and taking a dimethyl carbonate and amide mixed solvent system as a reaction medium. The solvent system adopted by the invention can dissolve various rigid monomers, the temperature resistance grade of the resin is high, and the prepared resin solution can be stored for a long time at room temperature.

Method for co-producing composite fertilizer special for peanuts during preparation of monopotassium phosphate

The invention discloses a method for co-producing composite fertilizer special for peanuts during preparation of monopotassium phosphate. The method comprises three steps of raw material mixing reaction, preparation of monopotassium phosphate and preparation of the composite fertilizer special for the peanuts. The monopotassium phosphate prepared by the method is higher in purity; in a production process, the composite fertilizer special for the peanuts is prepared by processing and adjusting filtrate, so that sufficient nutrition can be supplied to the normal growth of the peanuts.

Inner-light light box sticker

The utility model relates to an inner-light light box sticker which comprises a translucent PVC (polyvinyl chloride) film layer, a pressure-sensitive glue layer and an isolation paper layer and is characterized in that a layered structure is formed by sequentially arranging and sticking the translucent PVC film layer, the pressure-sensitive glue layer and the isolation paper layer. The material adopts the translucent PVC film which can be printed and then directly stuck on the transparent glass to replace acrylic boards, so that the internal light can exert the effect of uniform light perviousness at night; the material can be subject to jet painting so as to play the advertising and decorating roles; and the product is convenient to use, the pictures can be changes freely, and the cost is greatly lowered.

Cycloaliphatic epoxy polyurethane acrylate ultraviolet-curable coating and preparation method of ultraviolet-curable coating

The invention discloses a modified cycloaliphatic epoxy polyurethane acrylate ultraviolet-curable coating. The coating comprises the following chemical components in percentage by weight: 40-85% of modified cycloaliphatic epoxy polyurethane acrylate prepolymer, 10-55% of activated monomer diluent, 0.5-5% of photoinitiator, 0.1-2% of leveling agent, and 0.1-5% of adhesion promoter, wherein the sum of weight percentage of the raw materials is 100%. The invention also discloses a preparation method of the modified cycloaliphatic epoxy polyurethane acrylate ultraviolet-curable coating. The coating disclosed by the invention has the characteristics of strong impact resistance, high adhesion and the like, shrinkage of the curing system is small and the flexibility of the cured film is good. The coating can be used as coating materials of various metal sheets.

Method for preparing potassium dihydrogen phosphate and preparing special fertilizer for pitaya as byproduct

The invention relates to the technical field of chemical industry, and discloses a method for simultaneously preparing potassium dihydrogen phosphate and a special fertilizer for pitaya. The method comprises the following steps: reacting phosphoric acid with carbomite to prepare an intermediate, reacting the intermediate with an alkaline potassium salt to prepare potassium dihydrogen phosphate, controlling the content ratio of nutrients in a filtrate in the potassium dihydrogen phosphate crystallizing process, and adding trace element compounds to the potassium dihydrogen phosphate separated filtrate in order to prepare the special fertilizer for pitaya. The method improves the purity of potassium dihydrogen phosphate, and a small dose of the special fertilizer for pitaya, prepared by analyzing the ratio of the nutritional elements required in the growth process of pitaya, is applied to achieve a large output of pitaya.

Track pedal type conversion device

The utility model discloses a track pedal type conversion device. The device comprises side plates, a bottom plate, a pull rod, a mounting base and the like, the switch is provided with a bottom plateand a side plate; the side plates and the bottom plate are connected into a frame; a supporting rod and a rotating shaft are arranged on a side plate of the frame; the right and left surfaces of a shifting fork on the rotating shaft are connected with telescopic rods; a compression spring is arranged between the supporting rod and the telescopic rod; the device is characterized in that under theaction of the compression spring, mechanical self-locking of the device is achieved, the requirement for safety and reliability is met, raw material consumption is reduced through structural change, the device is simple in structure, safe, reliable and capable of saving manpower and achieving remote automatic control, and the device is an ideal tramcar lane changing conversion device.

Application downloading method and mobile terminal

The invention discloses an application downloading method and a mobile terminal. The application downloading method comprises the following steps: receiving an application downloading request; obtaining an unique identification of the application; inquiring whether the application is mounted or/ and stored in a terminal from a pre-stored application record sheet according to the unique identification; presetting the application record sheet in the terminal to record the application mounting or storing condition in the terminal; when downloading the application, obtaining the unique identification of the application to be downloaded; inquiring whether the application is mounted or stored in the terminal from the record sheet according to the unique identification information; deciding whether to download the application according to the inquiring result. With the adoption of the application downloading method and the mobile terminal, a user can be prevented from repeatedly downloading the ...

Method for improving wireless internet stability of multiple inverters in microgrid by utilizing virtual impedance

The invention discloses a method for improving the wireless internet stability of a plurality of inverters in a microgrid by utilizing virtual impedance. The method comprises the following steps of: (1) calculating a droop control coefficient according to the requirement of the microgrid on power quality; (2) estimating a grid line parameter and calculating the stable range of the droop coefficient; (3) substituting the droop coefficient calculated in the step (1) into the range calculated in the step (2) for verifying; if the droop coefficient is not in the stable range, performing a step (4); if the droop coefficient can stabilize completely, performing a step (5); (4) according to a result calculated in the step (3), properly changing virtual inductance or resistance and repeating the step (2) and the step (3) in turn; and (5) realizing the droop control of the virtual impedance. In the method, feedback control is performed on an output voltage by utilizing output current of each micro ...

Filter pressing device

The utility model provides a filter pressing device, including two parallel arrangement bear the wall, set up and bear a plurality of filter -pressing boards between the wall two, bear the weight of the wall intermediate formation have between separating groove, the relative both sides rigid coupling of each filter -pressing board has and is the upper and lower slip roller of arranging, the slip roller bears the weight of respectively and bears the weight of the wall and slide bearing the weight of on the wall and can follow, each bears the weight of the slide rail that two upper and lower parallels were installed in the wall outside, installs a slidable dolly on each slide rail, the dolly is used for coordinating the upper and lower slip roller of arranging correspondingly, with the drive the slip roller slides. The utility model discloses the dolly that filter pressing device corresponds through the slip roller arranged about filter -pressing board both sides set up and cooperation to ...

Steel rail weld seam detection machine and method

The invention discloses a steel rail weld seam detection machine and method and relates to the technical field of steel rail detection. A detection machine body comprises two parallel ground traveling frames and two upper cross beam frames perpendicular to the ground traveling frames; a secondary motion system is arranged at the tops of the upper cross beam frames in a sliding manner and connected with a detection mechanism, and drives the detection mechanism to move along the ground traveling frames; a primary motion system is connected with the secondary motion system and drives the secondary motion system to move along the upper cross beam frames; a track check device is parallel to the ground traveling frames and fixed to stand columns; a controller is connected with the primary motion system, the secondary motion system, the detection mechanism and the track check device respectively and used for controlling the operation of each part. When the detection machine is used for detecting ...

MMC-MTDC system starting control method

The invention relates an MMC-MTDC system starting control method comprising the following steps that A. the DC side poles of all converter stations are connected, the submodules of all the stations are locked, and the AC switch of an active station is closed so as to enter an uncontrollable charging stage; B. after voltage of the submodules of all the converter stations is higher than respectively corresponding charging threshold voltage, a controllable voltage equalizing charging method is switched on by the converter stations respectively and a controllable charging stage is initiated, and the AC side soft starting resistor of the active station is removed simultaneously; and C. when the station control mode is that voltage of the submodule of the constant DC voltage controlled converter station is rated and stable, the converter station enters an unlock operation stage firstly; and when voltage of the submodules of the rest stations is rated and stable, the stations are unlocked respectively ...

Powder-feeding device of heated spraying gun

The utility model relates to the powder-feeding device of a hot spraying gun, which is the powder-feeding device matched with the hot spraying (welding) guns to solve the problems that a present flame spraying (welding) gun only has a single barrel for feeding powder, under the condition of alternately feeding powder, the operation is inconvenient and the quality of the coat is hardly guaranteed. The powder-feeding device of the utility model is composed of two powder barrels which are fixedly connected and a three-way change-over valve; under the condition of uninterrupted spraying (welding) operation, the utility model can conveniently realize powder feeding by a single barrel, alternate powder feeding, powder feeding simultaneously by the two barrels, and the close of the powder feeding through rotating a valve core.

Method of effectively lowering B-bit antislte defect concentration of R2FeMoO6

The invention discloses a method of effectively lowering the B-bit antislte defect concentration of R2FeMoO6 and belongs to the technical field of ceramic materials. The invention has the key points of the technical scheme that the method of effectively lowering the B-bit antislte defect concentration of the R2FeMoO6 comprises the following steps: with RCO3, Fe2O3 and MoO3 as the raw materials, fully grinding, putting the ground raw materials in a high-temperature sintering furnace, pre-sintering, then respectively carrying out twice grinding and tabletting, and forming by high-temperature sintering in the mixed atmosphere of H2/Ar, and finally quickly cooling in the atmosphere of Ar to prepare R2FeMoO6 serving as a colossal magnetoresistance material with low B-bit antislte defect concentration. According to the method disclosed by the invention, by virtue of quick cooling in the atmosphere of the Ar, the environment formed by Fe/Mo antislte defects is destroyed, the B-bit antislte defect ...

Straw incineration device

A straw incineration device comprises a cart, an incinerator and a smoke treatment device are installed on the cart, a smoke outlet of the incinerator is communicated with a smoke pipe, the smoke treatment device comprises a filtering smoke pipe, the filtering smoke pipe is of a tubular structure with the lower end sealed, the lower end of the filtering smoke pipe is communicated with a blow-off pipe, and a second valve is installed on the blow-off pipe. The draught fan is installed on the filtering smoke pipe between the smoke treatment device and the incinerator and can drive smoke in the smoke pipe to flow into the filtering smoke pipe from the incinerator, so that on one hand, smoke in the incinerator is promoted to be exhausted, smoke accumulation is avoided, on the other hand, more smoke can be conveniently filtered through the smoke treatment device, and the combustion efficiency is improved. The flue gas treatment efficiency is improved.

Double sealing's double reducing ball turntable bearing

The utility model provides a double sealing's double reducing ball turntable bearing, includes outer lane, first piece inner circle, second piece inner circle, rolling element, spacing block, sealing strip and inlayer sealing mechanism, is equipped with inside bellied annular boss on the interior disc of outer lane, by the both sides face of annular boss forms two raceways respectively. The utility model discloses an outside of raceway sets up the seal and forms the second floor of double reducing ball turntable bearing sealedly between the second piece inner circle of double reducing ball turntable bearing and outer lane, makes and forms confined space between seal and the sealing strip between second piece inner circle and the outer lane, and the effectual emollient that has prevented leaks and the invasion of dust, aqueous vapor or other filths in the external world in rolling pair the space in, and then has improved the life and the precision of bearing greatly, the utility model has ...

Instant mint-flavor noodle piece and preparation method thereof

The invention discloses an instant mint-flavor noodle piece and a preparation method thereof. The noodle piece is made from the following raw materials in parts by weight: 500 parts of wheat meal, 50-80 parts of fresh mint leaves, 60-80 parts of white sugar, 1.5-2.5 parts of salt and 4-9 parts of honey. The preparation method comprises the following steps: 1, juicing and filtering the fresh mint leaves, 2, baking pumpkin seed kernels till being completely cooked, and crushing to the size of rice grains, 3, uniformly mixing and stirring the raw materials to obtain dough, and subsequently pressing and machining into small leaf-shaped noodle pieces, 4, preparing iced seasoning water with the quality white sugar and the salt, 5, boiling the leaf-shaped noodle pieces to be completely cooked, subsequently putting into the iced seasoning water to be cooled, thoroughly cooling down, draining the water, subsequently soaking in the honey, baking in a high-vacuum oven to be faint yellow at 80-100 ...

Conversation answering method and device

The invention discloses a conversation answering method. The method includes the steps that during a conversation with a first contact person, if a conversation request of a second contact person is received, whether the priority of the first contact person is higher than that of the second contact person or not is judged; if the priority of the first contact person is higher than that of the second contact person, the conversation request of the second contact person is put to a background, and after the conversation with the first contact person is finished, a user is reminded of the conversation request of the second contact person. The invention further discloses a conversation answering device. During the conversation with the important contact person, the conversation request sent by the contact person with the priority lower than that of the important contact person is not reminded, the phenomenon that the conversation with the important contact person is terminated forcibly due ...

Heat exchange structure

The utility model provides a heat exchange structure, including heat conduction passageway and heat dissipation channel, the heat conduction passageway is wavy passageway, and heat dissipation channel includes a plurality of cooling tubes, and the cooling tube is installed in the heat conduction passageway, and is perpendicular with the plane that the conveying of heat conduction passageway air current belonged to. The utility model discloses an install the cooling tube perpendicularily in the heat conduction passageway, with heat conduction direction of transfer vertical cross, so can prolong the conveying heat transfer time of air current in the heat conduction passageway to the deashing is easily dismantled to the cooling tube.

Little chicken coop for chicken feeding

The utility model discloses a little chicken coop for chicken feeding, including top cap, casing, mosquito net and reel, the water inlet is installed at the top of top cap, the bottom of top cap is provided with the locating piece, the grid board is installed to the bottom of casing, the top of casing is fixed with the mounting hole, the slide rail is installed in the place ahead of mosquito net,the reel is connected with the vent, the place ahead of reel is fixed with the baffle, it keeps warm to be provided with on the reel rolls up the curtain. This little chicken coop for chicken feeding,be equipped with the mosquito net, effectual when avoiding summer the mosquito appear to the serious healthy problem of chicken that influences of biting of chicken, be favorable to the growth of chicken, it keeps warm to be equipped with rolls up the use of curtain cooperation vent, the cooperation thermometer is to the control of house external environment, can open or a rolling heat preservation ...

Method for continuously producing high-cleanness silicon dioxide

The invention relates to a method for continuously producing high-cleanness silicon dioxide. The method comprises the following steps: (1) a sodium sulfate solution V0 of which the amount-of-substance concentration n0 is 0.5 to 1 mol/L is added into a continuous reactor; (2) a sodium silicate solution of which the amount-of-substance concentration n1 is 1 to 1.5 mol/L is added into the continuous reactor, and the pH value of a reaction liquid is regulated to 8 to 10; (3) a reaction system is kept at 59 to 61 DEG C, at the same time, the sodium silicate solution of which the amount-of-substance concentration n1 is 1 to 1.5 mol/L and the sulfuric acid solution with the amount-of-substance concentration n2 are added, the volume of the added sodium silicate solution is V1, the volume of the added sulfuric acid solution is V2, the V1, V2, n1, n2 and V0 satisfy the following three relational expressions: V1*n1=V2*n2; (V1*n1)/(V1+V2)=no; n0 Подробнее

MMC-MTDC system coordination starting control method

The invention relates an MMC-MTDC system coordination starting control method comprising the following steps that A. the DC side poles of all converter stations are connected, the submodules of all the stations are locked, and the AC switch of an active station is closed so as to enter an uncontrollable charging stage; B. after voltage of the submodules of all the converter stations is higher than respectively corresponding charging threshold voltage, a controllable voltage equalizing charging method is switched on by the converter stations respectively and a controllable charging stage is initiated, and the AC side soft starting resistor of the active station is removed simultaneously; and C. the submodules of all the converter stations are charged until unlock operation is performed. According to the uncontrollable charging stage, AC side pre-charging, DC side pre-charging or AC-DC side mixed pre-charging are respectively switched on according to the situation of AC and DC side power ...

CMMC start control method

The invention relates to a CMMC start control method which is a clamp double sub-module modular multilevel converter start method. Sub-modules can be charged to nominal voltage through auxiliary charging, and a whole current positive bridge arm and part of half-bridge sub-module units of a current negative bridge arm are cut. Half-bridge sub-module units, required to be cut, of the current positive bridge arm can be selected with a soft start voltage-sharing strategy. According to the CMMC start control method, various drive states and output voltage of a clamp double sub-module are explained, an appropriate driving state is chosen, and specific implementation of a soft start voltage-sharing process is completed, so that soft start voltage-sharing is easy to implement, and the operation is simple and convenient.

Multi-functional dynamic reactive power compensation device for micro-power grid and control method thereof

The invention discloses a multi-functional dynamic reactive power compensation device for a micro-power grid and a control method thereof, and the multi-functional dynamic reactive power compensation device comprises a voltage Hall installed at a connection point of the multi-functional dynamic reactive power compensation device for the micro-power grid and the micro-power grid, a current transformer for detecting current between the micro-power grid and a large power grid, a low-pass filter consisting of a resistor and a capacitor, the connection point of a load or an inversion device in themicro-power grid and the micro-power grid, and a first load arranged at the connection point; the current transformer is arranged between a control switch and the connection point; and a second load is arranged between the voltage Hall and the low-pass filter. The multi-functional dynamic reactive power compensation device has better compensation performance when the micro-power grid and the large power ...

Tobacco bulk curer dust removal and desulfurization device

The utility model discloses a tobacco bulk curer dust removal and desulfurization device, including gas wash tower, settling basin, the gas wash tower includes the tower body of cylinder, the one end of tower body is sealed, the other end of tower body is equipped with the chimney, the diameter of chimney is less than the diameter of tower body, the side intercommunication of tower body has into tobacco pipe, advance the tobacco pipe and the tower body is perpendicular sets up, the intercommunication has the connecting pipe on advancing the tobacco pipe, the connecting pipe with advance that the tobacco pipe is perpendicular to be set up, the one end of connecting pipe and tub intercommunication of discharging fume of bake out furnace, the other end swing joint of connecting pipe have can with the connecting pipe open with the apron of closing, be connected with the stay cord on the apron, the one end and the cover connection of stay cord, the other end sets up in roast room. The utility ...

Topological optimization method of microgrid system

The invention discloses a topological optimization method of a microgrid system, comprising the following steps: step (1) determining initial limited conditions of the microgrid system; step (2) carrying out exhaustion on a topological structure of the system; step (3) selecting topologies required to be verified; step (4) abstracting the topologies required to be verified to be pictures which are formed by nodes and lines; step (5) listing adjacency matrixes corresponding to the pictures; step (6) carrying out isomorphism testing on the adjacency matrixes of the topologies; if the adjacency matrixes of the topologies are judged to be isomorphic, executing the step (7), and otherwise executing the step (8); step (7) if the topologies are judged to be isomorphic, showing that the topologies are redundant so as to eliminate the topologies, and executing the step (9); step (8) if the topologies are judged to be non-isomorphic, showing that the topologies have specificity so as to reserve the ...

Preparation method of supercapacitor electrode material LaMnO3

The invention discloses a preparation method of a supercapacitors electrode material LaMnO3, belonging to the technical field of synthesis of supercapacitor electrode materials. The technical scheme is as follows: the preparation method comprises the following steps: dissolving lanthanum nitrate hexahydrate, a 50 wt% manganous nitrate solution and citric acid monohydrate in water to obtain a mixed solution; and (2) heating the mixed solution in an 80-DEG C water bath to a dried gel state, drying in a vacuum drying oven at 180 DEG C for 30 hours, cooling to room temperature, and calcining at 300-1000 DEG C for 1-10 hours to obtain the supercapacitor electrode material LaMnO3. The LaMnO3 electrode material has favorable electrochemical stability, is an excellent supercapacitor electrode material, has the advantages of simple preparation method, cheap raw materials and environment friendliness, and solves the problem of application of the supercapacitor electrode material LaMnO3 in large-scale ...

Lifting type intelligent load switch operation vehicle

The utility model discloses a lifting type intelligent load switch operation vehicle. A base is installed at the top of a crawler-type chassis, double guide rails are arranged at the top of the base,a rolling lead screw is driven by an output shaft of a first driving device to rotate, the rolling lead screw is located between the double guide rails, and a sliding seat is arranged on the double guide rails and can slide on the double guide rails under the driving of the rolling lead screw; the sleeve type lifting mechanism comprises a telescopic sleeve, a supporting rod and a second driving device; the telescopic movement of a telescopic rod in the telescopic sleeve relative to a base of the telescopic sleeve is controlled by a second driving device; a base of the telescopic sleeve is fixedly connected with a hinged connecting rod, the hinged end of the hinged connecting rod is hinged to the sliding base, one end of the supporting rod is hinged to the base of the telescopic sleeve, theother ...

Offshore platform for offshore wind power flexible direct current connecting-in system

The invention relates to an offshore platform for an offshore wind power flexible direct current connecting-in system. The offshore platform is characterized by comprising a combined steel structure building divided into an upper layer and a lower layer, wherein each layer of steel structure building consists of a plurality of function rooms, in addition, the bottom of each layer of steel structure building adopts a plurality of steel plates for forming decks, the offshore platform is totally provided with two layers of decks including the upper layer of deck and the lower layer of deck, a bridge arm reactor region, a current converter valve hall, a direct current reactor region and a control chamber region are arranged on the lower layer of deck, and the upper layer deck is provided with a connecting transformer region, an alternating current connecting-in region, a control and auxiliary facility region, a 35kV alternating current power distribution device region, a valve cooling heat ...

Multifunctional sweeping machine

The invention discloses a multifunctional sweeping machine which comprises a walking mechanism, a rubbish sweeping and collecting assembly and a control system. The multifunctional sweeping machine further comprises a cleaning head assembly and a driving assembly controlling the cleaning head assembly to act. The rubbish sweeping and collecting assembly is arranged at one end of the walking mechanism, and the cleaning head assembly is arranged at the other end of the walking mechanism through the driving assembly. The driving assembly comprises a lifting mechanism, a rotating mechanism and a telescoping mechanism, wherein the telescoping mechanism is mounted on the walking mechanism, the lifting mechanism is mounted on the telescoping mechanism, and the rotating mechanism is mounted on the lifting mechanism and connected with the cleaning head assembly. The control system controls the walking mechanism, the rubbish sweeping and collecting assembly and the driving assembly to act. The multifunctional ...

Method for preparing ammonium dihydrogen phosphate and preparing special fertilizer for sorghum as byproduct

The invention relates to the technical field of chemical industry, and discloses a preparation method of a special fertilizer for sorghum as a byproduct. The method comprises the following steps: analyzing the ratio of nutritional elements required by the growth of sorghum by detecting the amounts of absorption of all the nutritional elements from soil in the growth process of sorghum, reacting phosphoric acid with carbomite to generate an intermediate, introducing ammonia gas into the intermediate to produce ammonium dihydrogen phosphate, crystallizing parts of ammonium dihydrogen phosphate to precipitate, adjusting the ratio of nutritional elements in a reaction solution to meet the growth of sorghum, and adding other nutritional elements required by sorghum in order to prepare the special fertilizer for sorghum. The preparation method has the advantages of full utilization of raw materials, good quality of the prepared ammonium dihydrogen phosphate, and low cost of the prepared special ...

Direct current transformer and control method thereof

The invention relates to a direct-current transformer and a control method thereof, and belongs to the technical field of flexible direct-current power transmission of a power system. According to the scheme, the transformer comprises a first transformer unit and a second transformer unit, the structures of the two transformer units are the same, each transformer unit comprises a single-phase inverter circuit, an isolation transformer and a single-phase rectifying circuit, the alternating-current end of each single-phase inverter circuit is connected with the primary side of the corresponding isolation transformer, and the alternating-current end of each single-phase rectifying circuit is connected with the secondary side of the corresponding isolation transformer. The direct current ends of the two single-phase inverter circuits are connected in parallel, the direct current ends of the two single-phase rectifier circuits are connected in series, and the alternating voltage phase configuration ...

RT-PCR (Reverse Transcription-Polymerase Chain Reaction) detection method for detecting six porcine coronaviruses

The invention belongs to the technical field of biological detection, and particularly relates to an RT-PCR (Reverse Transcription-Polymerase Chain Reaction) detection method for detecting six porcine coronaviruses. The detection method disclosed by the invention can be used for detecting the six porcine coronaviruses, and experimental results show that the nucleic acid of the six porcine coronaviruses can be detected through a pair of primers, so that the detection efficiency is improved, the detection cost can be saved, and the method has an important application value for detecting unknown samples of clinical diseased pigs.

Bulk curer heat recovery structure

The utility model discloses a bulk curer heat recovery structure, include heating chamber and flue -cured tobacco room, heating chamber and flue -cured tobacco room intercommunication, the bottom of flue -cured tobacco room is outwards extended and is formed the hydrofuge passageway, is equipped with collection gas passageway between hydrofuge passageway and the heating chamber, is equipped with two heat exchangers on the collection gas passageway, and the one end of collection gas passageway communicates through intercommunication mouth and hydrofuge passageway, and the gas passageway that converges still communicates through heat exchanger and heating chamber. The utility model adopts the above technical scheme, at the tobacco flue -curing in -process, the outdoor hydrofuge air of flue -cured tobacco of will originally directly discharging through the hydrofuge passageway, then through the exsiccation of heat exchanger, is got rid of moisture content, then returning the indoor heat energy ...

Preparation method of gold-lanthanum nickelate layered composite conductive thin film material

The invention discloses a preparation method of a gold-lanthanum nickelate layered composite conductive thin film material, which comprises the following steps: 1)taking ethylene glycol monomethyl ether as a solvent, taking lanthanum nitrate and nickel acetate as a solute to prepare a green transparent solution; 2)dropping the green transparent solution on a Si substrate for spin coating of a plated film, rotating for 9 seconds by rate being 1000 R/m, and rotating for 50 seconds by rate being 4000 R/m to obtain a precursor moisture membrane; 3)placing in a muffle furnace for annealing for 5 minutes at temperature of 750 DEG C; 4)repeating steps 2) and 3) for several times to obtain a lanthanum nickelate layered composite conductive thin film; and 5)using an ion sputtering instrument for sputtering on the lanthanum nickelate conductive thin film for 20-50 seconds to obtain a gold film, performing spin coating of a layer of lanthanum nickelate conductive thin film on the gold film, and placing ...

Direct-current short-circuit fault ride-through method of modular multilevel converter of full-bridge submodule

The invention relates to a direct-current short-circuit fault ride-through method of a modular multilevel converter of a full-bridge submodule. The method achieves the purpose of direct-current short-circuit fault ride-through under the conditions that the converter is controlled and a conversion system is not off-network by controlling direct-current busbar voltage as zero, thereby being particularly suitable for occasions such as direct-current overhead line transmission high in direct-current fault rate. The basic principle includes that after direct-current short-circuit current is detected, the direct-current busbar voltage is directly turned over so as to inhibit short-circuit current, after the current drops into a normal range, the direct-current busbar voltage is controlled as zero, and alternating-current side reactive power output is maintained; after the direct-current short-circuit fault is eliminated, the direct-current basbar voltage is increased to a rated value, and active ...

Novel high-precision electrical electronic Brinell hardness tester

The invention provides a novel high-precision electrical electronic Brinell hardness tester, comprising a body, a test platform and a pressure head; wherein the test platform drives the tester to lift up and down through hand wheel and screw rod; the pressure head seat is connected with ball spline; the upper portion of the ball spline is connected with a pressure sensor; the upper portion of the pressure senor is orderly connected with a high hardness platform, a high rigidity lever driving the ball spline to do vertical linear motion; the other end of the lever is provided with a precision ball screw pair having an exact guiding device; the ball screw pair is driven by the servo-actuator; the invention is characterized in that: the ball spline is precise; precision of the ball screw pair is higher that 3 class; the lower portion of the test platform is mounted with a piezoelectric ceramic force value loading block composed by overlapping multiple piece of piezoelectric ceramics; the piezoelectric ...

High-precision hardness tester force value loading adjusting device

The invention provides a high-precision hardness tester force value loading adjusting device, comprising a high-rigidity body, a pressure head lifting device and a working platform coarse lifting device; the axle wire of force value loading of the device is mounted with a piezoelectric ceramic force value loading block composed by overlapping multiple piece of piezoelectric ceramics; the circuit connecting structure of the multiple piece of piezoelectric ceramics is in parallel connection, the excitation voltage thereof is supplied by driver through positive and negative electrode wires; the driver is controlled by computer; compared the technical proposal of the invention with the prior technical device, the device can cause the precision of the force loading to exceed more than +/- 0.1% and has the advantages of fast response, compact structure.

Active commutation hybrid converter and control method and device thereof

The invention belongs to the technical field of commutation in power electronics, and particularly relates to an active commutation hybrid converter and a control method and device thereof. The method specifically comprises the steps that based on an existing active commutation hybrid current converter, a trigger delay angle output by a controller is changed by increasing the direct current voltage of the active commutation hybrid current converter and the voltage margin delta Udref of a direct current voltage reference value of a direct current controller and changing a reference value gamma ref of a turn-off angle, and therefore the hybrid current converter is controlled; the delay turn-off time of each bridge arm auxiliary branch full-control sub-converter of the hybrid converter is set to be 0.01 (pi-alpha)/pi, the delay turn-off time of the main branch full-control sub-converter is set to be T1, and 0.01 (pi-alpha)/pi-T1 is larger than the maximum recovery time of the main branch half-control ...

Heavy -calibre sump pit shaft bottom whirl sediment outflow device

The utility model relates to a heavy -calibre sump pit shaft bottom whirl sediment outflow device, include well substrate holder, whirl sediment outflow circulation pipe, intake pipe, row's sand tube, arrange husky pump, the pre -buried setting of well substrate holder is around the wall of a well in shaft bottom, and the installation of annular whirl sediment outflow circulation pipe is fixed on well substrate holder. The utility model discloses during the well -flushing operation, to supplying compressed air in the supply duct, whirl sediment outflow circulation pipe lets shaft bottom water form circulation, and messenger's sand grain is concentrated to shaft bottom central authorities, opens the sediment outflow pump simultaneously, on one side circulation, the sediment outflow reaches the overall process of accomplishing the well -flushing sediment outflow on one side. This simple structure, easily the operation improves well -flushing sediment outflow efficiency greatly, and the operation ...

Automobile engine sensor measurement experiment platform

The utility model relates to an automobile engine sensor measurement experiment platform, it includes test bench rack and test bench mesa, rear side setting on the test bench rack the sensor is arranged on, from left to right in proper order for solar term door sensor, spark plug sensor, fuel sprayer sensor and knock sensor to test bench mesa, fixed two row upper and lower automobile engine sensors on the test bench mesa, and the lower sensor of rowing be air mass flow sensor, temperature sensor, crank axle position sensor, speed sensor and oxygen from left to right in proper order and including level sensor, all is equipped with the reservation of being connected with the sensor pin that corresponds below each sensor and tests the interface. The utility model discloses what use is the instrument disconnect -type, and each sensor of automobile engine is fixed promptly to administrate for each sensor and reserve the experiment interface, test the problem that measuring instrument is heavy ...

Multi-sensor fusion type fault locating method for gearbox of wind turbine generator

The invention provides a multi-sensor fusion type fault locating method for a gearbox of a wind turbine generator. The multi-sensor fusion type fault locating method for the gearbox of the wind turbine generator comprises the seven steps that firstly, application conditions of a fault locating model are determined according to the inner structure of the gearbox and the positions and the number of vibration sensors; secondly, collected vibration signals are analyzed according to an existing fault diagnosis technology, and corresponding fault characteristic values are extracted; thirdly, a relation between a faulty component and a characteristic value set is established according to the parsimonious covering theory; fourthly, the position, the type and the degree of the fault of the gearbox are determined according to a gearbox endoscopy result; fifthly, the influences of different faulty components on vibration signals of multiple detecting points are analyzed, and a vibration attenuation ...

Doped barium zirconate titanate-based ferroelectric ceramic material and preparation method thereof

The invention discloses a doped barium zirconate titanate-based ferroelectric ceramic material and a preparation method thereof, and relates to the technical field of lead-free ferroelectric ceramic material synthesis. The key point of the technical scheme of the invention is that the doped barium zirconate titanate-based ferroelectric ceramic material has the composition of Ba1-x(A0.5B0.5)xZr0.15Ti0.85O3, wherein A is Bi; B is K, Na or Li; and x is larger than 0 and no larger than 0.1. The invention also discloses the preparation method of the doped barium zirconate titanate-based ferroelectric ceramic material. An existing lead zirconate titanate ferroelectric ceramic material contains lead, such that an environment pollution problem is caused during the application and waste treatment processes of the material. With the material provided by the invention, the problem is effectively solved; and the dielectric properties of the lead-free-series ferroelectric ceramic material are improved ...

Method for non-freezing long-term cell preservation

The invention discloses a method for non-freezing long-term cell preservation. The method comprises the following operation steps: (1) primary culture, (2) secondary culture, and (3) non-freezing long-term cell preservation, namely contact inhibition. The invention has the beneficial effects that the method has the advantages of lower cost, less pollution and high operation convenience and reliability compared with the conventional cell preservation based on a liquid nitrogen container. Particularly for some special projects (for instance, rare and precious genetically modified cells), after the rare and precious genetically modified cells are subjected to a batch of somatic cell cloning, the implementation of large-batch embryo production, namely embryo transplanting, needs to be determined by further verifying the in-vivo development condition of an embryo. If the special cells during pregnancy duration are subjected to freezing preservation, the survival rate can not be guaranteed, and ...

Needle plate sizing waterborne matte treatment production line

The invention discloses a needle plate sizing waterborne matte treatment production line, comprising an unreeling device, a storage buffer device, a waterborne pulp roller coating device, a primary oven, a cooling device, a secondary oven, a cooling sizing device and a reeling device, which are arranged sequentially from front to back, wherein the structures of the primary oven and the secondary oven are identical. By adopting the production line disclosed by the invention, a foundation is laid for guaranteeing the viscosity of a waterborne treatment agent, the sensitivity of the waterborne treatment agent to the external temperature is reduced, the consistency of pulp is ensured, and the requirements of people for products are met. For realizing volatilization and drying of water in the existing waterborne treatment agent, the invention provides a new method and new equipment, and the problem that the waterborne treatment agent cannot be used in the industry is solved by alternately carrying ...

Study reaction information real-time testing and analyzing system and its real-time testing and analyzing method

Turn-round planning method for automatic driving vehicle in narrow channel under mine

The invention discloses a U-turn planning method for an automatic driving vehicle in a narrow channel under a mine. The method comprises the following steps: S1, determining a U-turn planning starting point area; s2, performing tunnel region planning, and generating an interval navigation path and a local path; s3, performing chamber area planning: according to a tunnel area planning result, enabling the automatic driving vehicle to run into a U-turn planning starting point area, establishing a chamber planning area discrete map, setting a step length Sn, performing node expansion until the node is expanded to a target point, and generating a collision-free path; and S4, carrying out post-processing on the collision-free path generated in the step S3: constructing a target function, carrying out modeling on discrete points of the collision-free path by adopting a nonlinear optimization planning problem, and obtaining a final smooth path solution by adopting a corresponding solver. According ...

Servo driver's IPM protection circuit

The utility model discloses a servo driver's IPM protection circuit, mainly include the IPM module of being connected with the generating line, the IPM module comprises multiunit IGBT module, the current signal of IPM module converts voltage signal to through corresponding the hall current sensor that sets up, it has voltage comparater to correspond hall current sensor settings, voltage comparater's output opening or closing through line control IGBT module switch of the same kind, another route way of voltage comparater is with voltage information transmission to the MCU controlling means who detects, MCU controlling means carries out command control through voltage information to the IPM module. The utility model provides a servo driver's IPM protection circuit adopts an improvement type hall current sensor measuring current, can improve the protection precision to the IPM module.

Four point contact ball turntable bearings

The utility model provides a four point contact ball turntable bearings, includes outer lane, inner circle, rolling element, spacing block, round pin, stopper, sealing strip and inlayer sealing mechanism, is equipped with outside sunken V -arrangement groove A on the interior disc of outer lane, is equipped with inside sunken V -arrangement groove B on the outer disc of inner circle, V -arrangement groove A and V -arrangement groove B correspond the raceway that sets up the formation rolling element. The utility model discloses a setting up the seal in arbitrary one side of four point contact ball turntable bearings raceway and forming four point contact ball turntable bearings's the second floor sealedly, make and form confined space between seal and the sealing strip of arbitrary one side of raceway, the effectual emollient that has prevented leaks and the invasion of dust, aqueous vapor or other filths in the external world in rolling pair the space in, has improved the life and the ...

Production method for tricalcium phosphate

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for tricalcium phosphate. A tricalcium phosphate product is prepared by directly reacting urea phosphate and calcium hydroxide at a reaction temperature of 70-90 DEG C; controlling a stirring speed; detecting a pH value until the pH value reaches 8-9; separating by centrifugation and drying. By replacing wet-process phosphoric acid, hot-process phosphoric acid and purification phosphoric acid in a conventional process by urea phosphate, energy consumption is reduced; discharge of wastes is prevented; and economic benefits and environmental values are significant. By adjusting the process, the tricalcium phosphate product can reach a food level tricalcium phosphate product completely. A total calcium content of the product is 37.37-38.54%; ignition loss can be reduced by 6-10%; lead content reaches 1.5-1.9 mg/kg; fluoride content reaches 60-70 mg/kg in terms of F; arsenic ...

Hybrid sub-module MMC converter with direct-current fault ride-through capability

The invention relates to a hybrid sub-module MMC (multimedia card) converter with direct-current fault ride-through capability. The hybrid sub-module MMC is similar to the half-bridge MMC in topology, namely a three-phase six-bridge structure, but the single bridge is successively cascaded by m half-bridge sub-modules (HBSM), n full-bridge sub-modules (FBSM) and one clamp dual sub-module (CDSM); the high direct-current voltage utilization rate of FBSM, the direct-current fault current self-cleaning of FBSM and CDSM and the economic advantage of HBSM are integrated to optimally select the amount of m, n and one according to the actual demand, so that the converter can be applied to a flexible direct-current transmission system, in particular, to an occasion with the higher commissioning rate, when the system has one direct-current fault, it is promoted in capacity to save the economic cost under existence of the direct-current fault ride-through capability.

Three-dimensional two-way perspective film

A three-dimensional two-way perspective film comprises a semi-perspective PVC (Polyvinyl Chloride) film layer, a pressure-sensitive glue layer and a releasing paper layer, wherein the releasing paper layer is adhered on the semi-perspective PVC film layer by the pressure-sensitive glue layer, and communicated through holes are arranged on the semi-perspective glue layer and the pressure-sensitive glue layer. Compared with the existing product, the spraying picture has double-surface perspective function, as the material is provided with a round hole, the scenery at the other side can be seen from the side with dark light through the round hole, so that the whole material has the perspective function; and the material has the advantages of better ductility, UV (Ultraviolet) resistance and excellent aging resistance, is good in ink absorbing property and high in precision of the spraying picture.

Preparation method of double perovskite Sr2FeMoO6 nano-material

The invention discloses a preparation method of a double perovskite Sr2FeMoO6 nano-material. The method comprises the following steps: 1, respectively weighing raw materials comprising SrCO3, Fe powder and Mo powder according to the stoichiometric ratio of Sr2FeMoO6, adding the raw materials to a diluted nitric acid solution, and fully stirring for complete dissolving and uniform mixing of the raw materials; 2, adding citric acid to the solution prepared in step 1, and uniformly mixing; 3, fully reacting the solution prepared in step 2 in a 40-60DEG C water bath for 4.5-5.5h, drying at 70-90DEG C to obtain powder, and calcining the obtained powder at 210-230DEG C to obtain flour; and 4, fully grinding the flour obtained in step 3, reacting the flour at 710-730DEG C for 9.5-10.5h, fully grinding the obtained flower, tabletting, and carrying out high temperature sintering on obtained tablets in H2/Ar mixed atmosphere with a volume percentage ratio of 9%/95% at 110-130DEG C under a flow of ...

Porcine circovirus type 2 recombinant cap protein and subunit vaccine

The invention belongs to the field of molecular biology, and discloses a porcine circovirus type 2 recombinant cap protein and a subunit vaccine. The porcine circovirus type 2 cap protein expressed by recombinant Escherichia coli is obtained by steps of cloning a porcine circovirus type 2 cap protein in a nuclear localization signal area of which the N terminal is cut and which is rich in arginine into a prokaryotic expression vector to obtain a recombinant expression vector, transfecting the recombinant expression vector into Escherichia coli BL21(DE3), and expressing by using the recombinant Escherichia coli BL21(DE3). Tests prove that the constructed recombinant strain expresses a foreign protein stably. When the subunit vaccine is prepared from the expressed recombinant protein, an antigen has high purity and safety, does not have pathogenicity on animals such as pigs and the like, and passes safety evaluation easily.

Mobile terminal operating method and device

The invention discloses a mobile terminal operating method. The mobile terminal operating method and device comprises the following steps of obtaining preset information of a mobile terminal and confirming whether the obtained preset information meets the switching condition or not; and confirming a working mode corresponding to the obtained preset information according to mapping relation of the preset information and the working mode of the mobile terminal after confirming that the preset information meets the switching condition. The invention further discloses a mobile terminal operating device. The automatic switching of the working mode of the mobile terminal is achieved according to the obtained preset information, and the switching accuracy and efficiency of the working mode of the mobile terminal are improved.

Vinyl acetate-ethylene copolymer emulsion (VAE emulsion) and synthesis method thereof

The invention relates to vinyl acetate-ethylene copolymer emulsion (VAE emulsion) and a synthesis method thereof. The synthesis method comprises the processes of pre-emulsification, emulsion polymerization reaction, finishing and defoaming. The invention is characterized in that complex emulsifying agents added into a reaction system include a non-ion emulsifying agent, an anion emulsifying agent and a reactive type emulsifying agent. In the synthesis method, the complex emulsifying agents are adopted mainly, the solid content of the produced VAE emulsion is more than or equal to 54.5%, the number average particle size can be less than 0.3mu m, the stability is good and the viscosity is low; the polymerization reaction time is short, the speed is fast, the conversion rate is high, the technique is simple and the industrialization is easy to realize; and the obtained fine-particle-size VAE emulsion is white in color, can be used for industries such as high-end building coatings, paper and ...

Radioactive source alarming, positioning and tracking system device

The invention relates to a radioactive source alarming, positioning and tracking system device, belonging to the field of electronic information, mainly used for monitoring a radioactive source on thebasis of RFID, GSM and GPS techniques. The system can realize the non-contact type information acquisition processing of a radioactive source object; when the radioactive source is unauthorized to move but moves illegally the system can notify watchstanders and supervision departments in time so that a GPS\GSM system of a radioactive source tracker attached to the radioactive source automaticallystarts to work; and the system has a real-time monitoring and tracking function, sends alarming messages to an appointed mobile telephone number and an upper computer regularly, also displays the position of the radioactive source and realizes the automated monitoring of the radioactive source managed object. The invention combines a wireless communication technique with a personal computer and can ...

Start control method, start control device and start control terminal

The invention discloses a start control method, a start control device and a start control terminal. The start control method comprises the steps of obtaining using record information, resource occupancy information and program list information of an application program; regulating and controlling a self-starting value, a start order and the start time of the application program according to a preset regulating coefficient, the using record information, the resource occupancy information and the start list information. By implementing the start control method, the start control device and the start control terminal, disclosed by the invention, the situation of determining a start list, the start speed, the start order and a foreground-background operating state of a to-be-started program aiming at user demands and the state of current terminal equipment when start control on the terminal equipment is carried out is systematically realized, and thus the start parameter and the start state ...

Rapid active supporting method for high-stress soft rock large-deformation tunnel

The invention discloses a rapid active supporting method for a high-stress soft rock large-deformation tunnel. The rapid active supporting method comprises the following steps that a plurality of hydraulic props are installed on an upper step of the tunnel to temporarily support surrounding rock; pre-stress short anchor cables are constructed on the upper step tunnel; the hydraulic props are dismantled in the area where the anchor cables are tensioned, and a concrete thin layer is sprayed on the surface of the surrounding rock in the area range; after the concrete thin layer is solidified to preset strength, constructing a prestressed long anchor cable on the surface of the concrete thin layer; erecting a steel arch frame on the surrounding rock of the upper step, welding a reinforcing mesh and connecting ribs, and re-spraying concrete; pre-stress short anchor cables and pre-stress long anchor cables are constructed on the surface of step surrounding rock in the tunnel, after completion ...

Method for preparation of monopotassium phosphate and cogeneration of composite fertilizer for walnut tree

The invention discloses a method for preparation of monopotassium phosphate and cogeneration of a composite fertilizer for a walnut tree. The method comprises the following three steps: mixing reaction of raw materials, preparation of monopotassium phosphate and preparation of a composite fertilizer for a walnut tree. The monopotassium phosphate product prepared by using the method is high in purity; through regulation and control of technological conditions for producing monopotassium phosphate, the problem that impurities are difficult to process when the monopotassium phosphate is prepared from phosphoric acid through a traditional wet process is solved; the production cost is reduced; the composite fertilizer prepared by using filtrate can meet the requirements of the walnut tree to the maximal extent; pollution to the environment is reduced by utilization of liquid waste; the production cost of the composite fertilizer is reduced; and the method has relatively high economic value.

Integrated frame column operation protection frame

The invention relates to the field of frame column construction, in particular to an integrated frame column operation protection frame which comprises a plurality of bases, each base comprises a mounting plate, a mounting pipe arranged on one face of the mounting plate and fixedly connected with the center of the mounting plate, and a fixing piece used for fixing the base to a foundation platform; the bearing platform comprises a bottom-layer platform and a mounting platform, the bottom-layer platform is fixedly mounted on the base through mounting parts, mounting sleeves are arranged at the positions, close to the four corners, of the bottom-layer platform and the mounting platform, during mounting, the mounting sleeves are arranged on the mounting pipes in a sleeving manner, and the mounting sleeves and the mounting pipes are connected and fixed through the mounting parts; the protection frame comprises a protection net and a mounting column, the protection net is mounted on the mounting ...

Direct-current broken-line fault determination method of flexible direct-current power transmission system

Disclosed in the invention is a direct-current broken-line fault determination method of a flexible direct-current power transmission system. Positive and negative direct-current bus currents, positive and negative direct-current bus current change rates, and an alternating-current and direct-current power difference value are detected and calculated; and a direct-current broken-line fault is determined to occur in the system when all the parameters meet the following conditions simultaneously: (1), any of absolute values of the positive and negative direct-current bus current values is less than a current limiting value; (2), absolute values of the positive and negative direct-current bus current change rates are larger than a current change rate limiting value; and (3), an absolute value of the difference value of the alternating-current and direct-current powers is larger than a power limiting value. According to the method, on the basis of changing features of the voltage and current ...

Collagen peptide and sodium alginate combined mixture and application thereof in prevention and treatment of intrauterine adhesion

The invention relates to a collagen peptide and sodium alginate combined mixture and application thereof in prevention and treatment of intrauterine adhesion, the collagen peptide and sodium alginate combined mixture comprises collagen peptide and sodium alginate, and the collagen peptide and sodium alginate combined mixture has anti-inflammatory and anti-fibrosis functions. The injectable collagen peptide and sodium alginate combined mixture disclosed by the invention can be used for reducing the release of inflammatory factors IL-1beta and IL-18 by inhibiting an NLRP3 inflammasome pathway, relieving endometrial injury, inflammatory response and fibrosis degree and improving reproductive capacity. The invention discloses an action mechanism of the injectable collagen peptide combined sodium alginate mixture in prevention and treatment of intrauterine adhesion, and provides a reliable experimental basis for the injectable collagen peptide combined sodium alginate mixture in prevention and ...

Subsides of preventing arching automobile body

The utility model relates to a subsides of preventing arching automobile body, include substrate layer, glue layer, cover the bottom, its characterized in that, the substrate layer be the PVC rete, the bottom that covers be PEK paper, the moisture content is 3.5%-5%, and 20 DEG C, hygrometry is 30%-90% when changing, the moisture content changes and is less than 4%. The utility model provides a current automobile body adhesion the phenomenon of arch camber easily appears when producing, guaranteed the quality of product, ensured simultaneously that the automobile body pastes the air brushing performance, reduced the loss, practiced thrift the cost. (B /) ...

Porcine circovirus 2 type inactivated vaccine

The pig circular ring virus 2 type (PVC2) inactivated vaccine (SH individual plant) of the invention belongs to biotechnology field. The pig circular ring virus 2 type poisonous individual plant SH belongs to circular ring virus section circular ring virus genus which has been preserved in Wuhan institute of virology, Chinese academy of sciences. The shanghai separated individual plant SH of purified PCV2 virus is obtained by gathering raw material from hogpen which happened bad weaning piglet multisystem exhaustion failure syndrome in Shanghai in 2002 year, separating, appraising and purifying virus. The PCV2-SH plant is proliferated in mass in PK-15 cell, inactivated through methyl aldehyde and emulsified with liquid paraffine adjuvant to prepare conventional liquid paraffin(e) adjuvant immunomodulators for vaccines. The laboratory has trial-manufactured five lots vaccines successfully which are good safety and also can induce pig bring immune protection effect, made out a draft rules ...

Silicon dioxide-calcium sulfate composite particle as well as preparation method and application thereof

The invention discloses a silicon dioxide-calcium sulfate composite particle as well as a preparation method and application thereof. The preparation method of the silicon dioxide-calcium sulfate composite particles comprises the following steps: 1) respectively preparing a sodium sulfate solution, a calcium silicate suspension and a sulfuric acid solution; and 2) continuously adding the calcium silicate suspension and the sulfuric acid solution into the sodium sulfate solution for reaction, keeping the pH value of the reaction solution at 8.0-9.0 and the reaction temperature at 50-90 DEG C in the reaction process until the calcium silicate suspension is completely added, continuously adding the sulfuric acid solution until the pH value of the reaction solution is 6.0-7.0, curing, and carrying out filter pressing, drying and crushing. The silicon dioxide-calcium sulfate composite particles have apparent density and water absorption similar to those of phosphorus-calcium compounds, are high ...

Production method of ammonium dihydrogen phosphate with by-product cherry special fertilizer

The invention relates to the technical field of chemical industry, and in particular to a production method of ammonium dihydrogen phosphate with a by-product cherry special fertilizer. Coefficients such as temperature in a wet process for preparation of ammonium dihydrogen phosphate are changed to improve the purity of ammonium dihydrogen phosphate product and to produce a compound fertilizer containing N, P and K in combined state. The method can improve the purity of ammonium dihydrogen phosphate, besides the produced cherry special fertilizer has good absorption rate; formaldehyde is added in a filtrate to prepare a controlled release compound fertilizer; and the produced cherry special fertilizer meets the nutritional needs of each period in the growth cycle, greatly increases cherry yield, and is a high efficient compound fertilizer.

Drug for antagonizing replication of porcine reproductive and respiratory syndrome virus and application thereof

A drug for antagonizing the replication of porcine reproductive and respiratory syndrome virus (PRRSV) and an application thereof. By using a viral infection test, a drug which antagonizes PRRSV—xanthohumol—is discovered for the first time from among a natural drug library of 386 plant sources. Xanthohumol can effectively inhibit PRRSV replication on both Marc-145 and PAM cells. Five xanthohumol derivatives having different molecular structures are artificially synthesized, and it is discovered that a derivative Xn-4 has the strongest inhibitory effect on virus replication in vitro. Test results of artificial infection and drug therapy in piglets show that the Xn-4 can effectively inhibit PRRSV viremia, relieve clinical symptoms of infected pigs, and significantly reduce lung inflammation and pathological damage.

Method for improving reproductive efficiency of surrogate sows