Method for calculating underground continuous wall with supporting legs under action of horizontal loads

The invention relates to a method for calculating a continuous wall with supporting legs under the action of horizontal loads. According to the specific constructing mode of the underground continuous wall with the supporting legs, firstly, a finite element program of a common elastic foundation beam method is modified and improved, a finite element program of a variable stiffness elastic foundation beam method is made, an engineering calculation method of internal force and horizontal displacement under the action of the horizontal loads is formed in combination of a depth judgment method on the interface of the supporting legs, and therefore when the continuous wall is used as a basement exterior wall and a foundation pit support structure, the lateral pressure of a soil body can be borne. The method can make engineer design personnel fast and effectively design and calculate the underground continuous wall with the supporting legs.

Supporting device for opening of drum-type oil tank

Leakage detecting agent for detecting leakage of weld joint in welding process and detection method

The invention relates to a leakage detecting agent for detecting the leakage of a weld joint in the welding process and a detection method, and is suitable for leakage detection of the weld joint, with a sealing requirement, in a pipeline, a tank body and a transformer structural member. The technical scheme is as follows: the leakage detecting agent comprises a photographic developer and a penetrating agent, wherein the photographic developer refers to a turbid liquid prepared by stirring chalk powder and industrial alcohol; the penetrating agent comprises dimethylbenzene, butanol and red oil-soluble dye through mixing. The photographic developer is coated on one surface of the weld joint through welding, the penetrating agent is coated and brushed on an unwelded part of the back surface of the weld joint after being dried, and a red spot-shaped trace is observed from the surface of the photographic developer, namely, a leakage point exists in the position. According to the leakage detecting ...

Wringing-function pulverizer suitable for movable incineration device

The invention discloses a wringing-function pulverizer suitable for a movable incineration device. A feeding hopper (4) is fixedly installed on the upper part of a pulverizing mechanism (1) of the wringing-function pulverizer, a wringing mechanism (2) is fixedly installed on the lower part of the pulverizing mechanism (1), a discharging mechanism (3) is fixedly installed on the lower part of the wringing mechanism (2), and the discharging mechanism (3) is fixed to a fixing support A (5) and a fixing support B (6). The wringing-function pulverizer realizes pulverization and dehydration of original solid waste produced by solid waste pre-treatment in burning, realizes combination of material pulverization and wringing, and realizes multi-functionalization and miniaturization.

High-efficiency energy-saving aeration apparatus and aeration method

The invention relates to the technical field of sewage treatment, specifically to a high-efficiency energy-saving aeration apparatus and an aeration method. The high-efficiency energy-saving aeration apparatus comprises an air-liquid mixer. The air-liquid mixer comprises an air-liquid mixer outer wall, a fluid director and wedge plates, wherein the wedge plates are fixed on a fixed pile, the fixed pile is fixed at one end of the air-liquid mixer, the other end of the gas-liquid mixer is a sewage inlet, and a compressed air drum inlet pipe is vertically arranged beside the sewage inlet and is communicated with the air-liquid mixer. The aeration method comprises the following steps placing the air-liquid mixer below the water surface of an aeration tank, directly delivering compressed air to the air-liquid mixer from the compressed air drum inlet pipe, passing through the fluid director to form helically ascending air flow which is crushed into fine bubbles when encountering the wedge plates ...

Toothbrush with medicine for prevention of decayed tooth

Metal equipment cleaning agent

The invention discloses a metal equipment cleaning agent. The metal equipment cleaning agent is composed of, by weight, one part to two parts of dodecyl trimethyl ammonium sulfate, two parts to three parts of fatty acid methyl ester ethyl oxides, one part to two parts of hydroxyethyl cellulose, two parts to three parts of polyethylene oxide propyl glyceryl polyoxyethyl ether, six parts to seven parts of carboxymethyl cellulose sodium, four parts to five parts of aspartic acid, seven parts to eight parts of fatty alcohol diethanolamine, one part to two parts of 4-tert-butylbenzoic acid, two parts to three parts of ethylene glycol monostearate, two parts to three parts of sodium pyrophosphate and one part to two parts of isomeric alcohol ethoxylates. The metal equipment cleaning agent is good in cleaning effect, capable of being repeatedly used and free of pollution, and has the rust protection capability, and after being cleaned, metal equipment can be kept rustless for a long time.

Preparation method of corn steep liquor mycoprotein composite hydrolysate and preparation method of L-isoleucine

The invention relates to a preparation method of corn steep liquor and mycoprotein composite hydrolysate and a preparation method of L-isoleucine, corn steep liquor is used as a raw material and fermented by threonine-producing escherichia coli to prepare the corn steep liquor and mycoprotein composite hydrolysate, and the corn steep liquor and mycoprotein composite hydrolysate is used as an organic nitrogen source for fermentation of the L-isoleucine. After the corn steep liquor is fermented by escherichia coli, the utilization rate of protein, amino acid and polypeptide in the corn steep liquor is increased, and quality fluctuation of the corn steep liquor can be overcome; the content of lactic acid is reduced, and fermentation inhibition on microorganisms is reduced; the corn steep liquor is fermented by escherichia coli to generate trace L-threonine which is used as a precursor substance for synthesizing the L-isoleucine to promote accumulation of the L-isoleucine, so that the acid ...

Bearing cleaning agent

The invention discloses a bearing cleaning agent which comprises the following components in parts by weight: 45 parts of deionized water, 4-5 parts of monostearin, 1-2 parts of polyethylene glycol laurate, 8-9 parts of phosphate, 1-2 parts of fatty amine polyoxyethylene ether, 4-5 parts of butanol, 2-3 parts of hydroquinone, 2-3 parts of N-methyl pyrrolidone, 7-8 parts of ethanol, 1-2 parts of sodium metasilicate and 3-4 parts of p-tert-butyl benzoic acid. The bearing cleaning agent provided by the invention is suitable for bearing cleaning, has a mild cleaning condition, is simple to operate and achieves a remarkable cleaning effect.

Belt wheel groove automatic detection instrument

The invention relates to a belt wheel groove automatic detection instrument. The belt wheel groove automatic detection instrument is characterized in that the belt wheel groove automatic detection instrument comprises a detection instrument body (8), a motor (21), a stand column (2) and a base (5) are connected to the detection instrument body (8), the stand column is connected with a rotating shaft (11), two belt wheels (4) are connected to an output shaft of the motor and the rotating shaft respectively and are connected and matched with each other through a belt (19), the base is connected with a lower longitudinal linear rail (6) connected with an upper longitudinal linear rail (7), a transverse linear rail (16) is connected to the upper longitudinal linear rail, a longitudinal sensor (36) and a transverse sensor (30) are connected to the upper longitudinal linear rail and the transverse linear rail respectively, a fixing plate (15) and a connecting base (14) are arranged on the upper ...

Prestressed section steel-reinforced concrete combined support and construction method thereof

The invention discloses a prestressed section steel-reinforced concrete combined support and a construction method thereof, and aims to provide a prestressed section steel-reinforced concrete combined support which can greatly reduce elastic compression deformation, creep deformation and shrinkage deformation of a concrete support, can greatly reduce the stress level of a passive area soil body in a pit, and can improve the construction efficiency. And therefore, the deformation of the foundation pit is reduced. A prestressed steel-reinforced concrete combined support comprises a first construction section concrete supporting beam, a second construction section concrete supporting beam and a steel-reinforced concrete beam, and one end of the first construction section concrete supporting beam is connected with an enclosure wall through the prestressed steel-reinforced concrete beam; the prestressed steel reinforced concrete beam comprises a prestressed pressurizing device, a profile steel ...

Coal hydrogasification furnace system of liquid slagging moving bed and hydrogasification method

The invention belongs to the technical field of coal chemical processing, and discloses a coal hydrogasification furnace system of a liquid deslagging moving bed and a hydrogasification method. According to the hydrogasification system, a gas outlet of a hydrogasification furnace is communicated with a gas inlet of a hydrogen membrane separator sequentially through a decompression tank, a chilling water washing tower and a gas-liquid separator, and a hydrogen outlet and a methane-rich outlet are formed in the hydrogen membrane separator; wherein a hydrogen outlet of the hydrogen membrane separator is divided into two paths to be communicated with a second gas inlet and a third gas inlet of the hydrogenation gasification furnace, and liquid outlets of the pressure reduction tank, the chilling water washing tower and the gas-liquid separator are all communicated with the tar collector. According to the hydrogasification method disclosed by the invention, the product components can be regulated ...

Rotating jacking mechanism and AGV comprising same

The invention discloses a rotating jacking mechanism and an AGV(Automatic Guided Vehicle) comprising the same and belongs to the field of automatic conveying devices. The rotating jacking mechanism comprises a base fixing plate, a rotation motor, a transmission assembly, a lead screw, a lead screw nut, a large bearing bracket, a large bearing and a hollow tray. The lead screw penetrates through the base fixing plate, and the lead screw is supported on the base fixing plate through the lead screw nut. The large bearing bracket, the large bearing and the tray are sequentially arranged on the lead screw from bottom up. The rotating motor and the transmission assembly are in transmission connection, and the transmission assembly is in transmission connection with the tray and the lead screw. The AGV comprising the rotating jacking mechanism comprises two driving wheels, four universal wheels, a battery pack, two driving motors, a driving motor driver, a vehicle body frame, two control boards ...

Automatic clamping mechanical arm for pneumatic casting shell

The invention discloses an automatic clamping mechanical arm for a pneumatic casting shell, and belongs to the technical field of clamping equipment. The automatic clamping mechanical arm comprises a clamping jaw support arm, an air cylinder, a first clamping jaw, a second clamping jaw, a connecting rod and a supporting jaw. When facing the casting shell before pouring, the air cylinder works to drive the first clamping jaw and the second clamping jaw to rotate simultaneously by taking the hinged part of the first clamping jaw and the second clamping jaw with the clamping jaw support arm as an axis through the two connecting rods, at the moment, the first clamping jaw and the second clamping jaw contract to clamp a casting opening of the casting shell, at the moment, notches in the first clamping jaw and the second clamping jaw are attached to the casting opening of the casting shell, and clamping is realized; and when facing the casting shell after pouring, the air cylinder works to drive ...

Soil sample screening device and screening method for soil detection

The invention relates to the technical field of soil sample screening, in particular to a soil sample screening device and method for soil detection. The receiving mechanism is used for containing soil, the processing mechanism is arranged on the receiving mechanism and is used for crushing the soil blocks contained by the receiving mechanism, the receiving mechanism comprises a powder containing part and a soil containing part, the soil containing part is used for containing the soil blocks needing to be crushed, and the soil blocks are crushed and screened through rotation of the processing mechanism; and the processing mechanism comprises an outer cover part and a crushing part arranged in the outer cover part, and in the working process of the crushing part, mud blocks needing to be crushed are clamped, and the exteriors of the mud blocks are ground layer by layer during crushing. According to the device, the friction strip is in contact with a mud block, and the outer surface of the ...

Process for removing sulfur dioxide in smoke by using white mud and its apparatus

The invention discloses a process for removing sulfur dioxide in smoke by using white mud and its apparatus. The apparatus comprises a separator for separating mud and stones, a desulfurizer box, a sand removal apparatus, a desulfurization tower, a regeneration pool, a sedimentation basin, a cyclone and a water extractor, the process comprises: removing sulfur dioxide in smoke by using residual white mud from papermaking waste or alkali factory pollution, and obtaining gypsum at same time. The present invention has the advantage that sodium radical contained in white mud can be complete used,SO2 can be quickly absorbed through a sodium radical absorption liquid, thereby a smaller liquid-gas ratio (5 - 10 :1) can be used for achieving a higher desulphuring efficiency of more than 90%, products gypsum can be prepared at the same time, the solid content of gypsum crystallization is more than 90%, so that the invention makes wastes profitable; a flue gas dispersion apparatus in a desulfurization ...

Dipeptide tripeptide permease mutant and application thereof in production of L-tryptophan

The invention discloses a dipeptide tripeptide permease mutant and application thereof in production of L-tryptophan, and belongs to the technical field of genetic engineering. Aiming at the problem that the tryptophan yield is influenced due to intracellular transport of tryptophan caused by existence of permease when tryptophan is produced by using gram-negative bacillus, a high-yield tryptophan strain is obtained through mutagenesis, and a dipeptide tripeptide permease mutant capable of improving the L-tryptophan yield is obtained. By expressing the mutant in Escherichia coli, the yield of tryptophan is increased.

Supporting device for opening of drum-type oil tank

The invention discloses a supporting device for an opening of a drum-type oil tank, comprising a left supporting piece, a right supporting piece, a connecting plate and an adjustable connecting shaft, wherein, the adjustable connecting shaft is fixed on the inner walls of the left and right supporting pieces; the connecting plate is fixed on the outer walls of the left and right supporting pieces; the outer walls of the lower parts of the left and right supporting pieces are matched with the inner wall of the opening; and the connecting plate is provided with a connecting hole connected with the edge of the oil tank. The supporting device provided by the invention has a simple structure, not only can provide a support for the opening of the tank to protect the opening from being damaged, but also is easy to disassemble and can not cause any influence on the opening after being disassembled. Especially the length of the supporting device can be adjusted, thus the supporting device can be ...

Feed additive suitable for nutritional fermentation of corn byproduct type fermented feed

The invention discloses a feed additive suitable for nutritional fermentation of corn byproduct type fermented feed, and belongs to the technical field of feed. The invention solves the problems that the existing corn by-product type fermented feed fermented by a microbial additive and an enzyme preparation additive in the market is low in material digestibility and the nutritional value of the corn by-product cannot be fully utilized. The feed additive comprises a microbial additive and an enzyme preparation additive, the microbial additive comprises lactobacillus plantarum, lactobacillus casei, enterococcus faecalis single bacteria, saccharomyces cerevisiae and bacillus subtilis, and the enzyme preparation additive comprises cellulase, xylanase and glucanase. The feed additive is suitable for corn by-product feed fermentation, and can effectively improve the digestibility of raw materials so as to improve the nutritional value of the feed.

Crane suspension arm guide mechanism for building construction

The invention discloses a crane jib guide mechanism for building construction, which comprises a mounting frame, a rotating shaft is rotatably arranged in the middle of two sides in the mounting frame, a top block is arranged on one side of the rotating shaft, a ratchet gear is arranged on one side of the outer side of the rotating shaft, and a winding shaft is arranged in the middle of the outer side of the rotating shaft. The outer side of the winding shaft is sleeved with a traction rope and a protection rope, and one end of the protection rope is provided with a top block. The guide sleeve capable of limiting is arranged at the bottom of the mounting frame, when the traction rope is moved and hoisted, the tail end of the traction rope is extruded and supported through the eight sets of guide wheels, so that the traction rope always moves on the same straight line during moving, shaking of the traction rope can be greatly reduced through the action of the guide sleeve, and the hoisting ...

Metal cleaner

The invention discloses a metal cleaner, which is composed of the following ingredients in parts by weight: 4-5 parts of deionized water, 2-3 parts of octanol, 2-3 parts of tetramethyl ammonium bromide, 4-5 parts of fatty alcohol-polyoxyethylene ether sulfate, 1-2 parts of glycerin monostearate, 8-9 parts of sodium phosphate, 1-2 parts of imidazolidine, 1-2 parts of mineral oil, 1-2 parts of sodium silicate, 6-7 parts of polyvinyl alcohol, 2-3 parts of tributyl phosphate, 2-3 parts of lignosulfonate, 4-5 parts of fatty alcohol-polyoxyethylene ether, 1-2 parts of benzotriazole, 1-2 parts of dodecyl trimethyl ammonium sulfate and 1-2 parts of oleoyl amino acid. The metal cleaner disclosed by the invention has the advantages of low alkaline, few bubbles and environment friendliness, has a very strong deoiling effect under lower temperature and is low in corrosivity.

Immunoliposome based on endostatin gene, preparation method and application thereof

The invention discloses immunoliposome based on endostatin genes, a preparation method and the application thereof. The immunoliposome comprises Vasohibin gene recombination eukaryotic expression vector, liposome and anti-eighth factor-associated antigen monoclonal antibody; wherein the liposome internally wraps up the Vasohibin gene recombination eukaryotic expression vector; the surface of the liposome is connected with the anti-eighth factor-associated antigen monoclonal antibody; the preparation method thereof comprises three steps of: the construction of the Vasohibin gene recombination eukaryotic expression vector, the preparation of the liposome wrapping up the Vasohibin gene recombination eukaryotic expression vector, and the connection of the liposome wrapping up the Vasohibin gene recombination eukaryotic expression vector and the anti-eighth factor-associated antigen monoclonal antibody. The immunoliposome can particularly act on vascular endothelial cells of the lung to inhibit ...

Waste liquor distillation apparatus

The invention discloses a waste liquor distillation apparatus which comprises a rack, wherein a heat-conducting oil tank, a condenser and an electric control cabinet are fixed on the rack; a vertical distillatory kettle and electric heating tubes are arranged in the heat-conducting oil tank; the electric heating tubes are close to the bottom of the distillatory kettle; a distillation cover is arranged on the top of the distillatory kettle; a liquid inlet pipe and an output pipe are arranged on the top of the distillatory kettle; the distillatory kettle is connected with the condenser through the output pipe; a liquid outlet pipe is arranged at the bottom of the condenser; valves are respectively arranged on the liquid inlet pipe and the liquid outlet pipe; multiple oil guide tubes are arranged in the distillatory kettle and horizontally penetrate through the distillatory kettle; and multiple fins are arranged at the outer peripheries of the oil guide tubes and are positioned inside the ...

Embedded PHORP changer

The utility model relates to an embedded PHORP changer, the changer includes changer shell, ARM micro -control ware, analog output unit, memory, RS485 communication interface, PHORP sensor, temperature sensor and AD translation unit, ARM micro -control ware respectively with memory, RS485 communication interface, AD translation unit and analog output unit bus connection, AD translation unit connects PHORP sensor and temperature sensor respectively. The beneficial effects of the utility model are that: the utility model discloses an import chip and components and parts adopt up -to -date style table to paste the production technology, guarantee that instrument job stabilization is reliable, and small, simple to operate, and the electronics integrated level is high.

Escherichia coli expression vector and construction method and application thereof

The invention discloses an escherichia coli expression vector as well as a construction method and application thereof, and belongs to the technical field of gene engineering. The invention solves the problem of low tryptophan yield in tryptophan production caused by low expression efficiency of the existing escherichia coli vector in the gene expression process. The Escherichia coli expression vector contains an artificially synthesized promoter sequence with functions in Escherichia coli, a section of multiple cloning site sequence for insertion expression of an exogenous gene, an artificial transcription termination sequence and a resistance selection marker capable of performing gene cloning expression in Escherichia coli. The Escherichia coli expression vector can realize efficient transcription and translation of genes. The escherichia coli expression vector is suitable for production of tryptophan.

Method for calculating vertical bearing capacity of underground continuous wall with landing legs

The invention relates to a method for calculating the vertical bearing capacity of an underground continuous wall with landing legs. According to the method, firstly, the composition of the bearing capacity of the underground continuous wall with the landing legs is analyzed; secondly, the bearing capacity of the landing legs and the bearing capacity of wall sections are determined so that the bearing capacity of the underground continuous wall with the landing legs can be obtained; thirdly, the vertical bearing capacity of the underground continuous wall with the landing legs and the vertical bearing capacity of the landing legs are calculated in a checked mode; lastly, the vertical bearing capacity of the underground continuous wall with the landing legs is obtained. According to the method, the special geotechnical engineering investigation is not needed, and the method can be suitable for application of engineering on a large scale.

Metal shell degreasing cleaning agent

The invention discloses a metal shell degreasing cleaning agent. The metal shell degreasing cleaning agent comprises the following components in parts by weight: 0.3 part of methylepichlorohydrin, 1.8 parts of phosphoric acid, 1.3 parts of mercapto-benzothiazole, 2.4 parts of polycarboxylic acid, 3.1 parts of tetrabutylphosphonium bromide and 0.7 part of polyglycerol monostearate. The metal shell degreasing cleaning agent has excellent cleaning capability, long rust-proof life, low foam and long service life.

Post-treatment heat management device and method under combined action of air inlet throttle valve and exhaust throttle valve

The invention discloses an after-treatment heat management device and method under the combined action of an air inlet throttling valve and an exhaust throttling valve. The method comprises the steps that an ECU obtains the SCR upstream temperature T measured by an SCR temperature sensor and the DOC upstream temperature measured by a DOC temperature sensor in real time; in the non-DPF regeneration mode, after set time, a comparison unit of the ECU judges whether the SCR upstream temperature T is smaller than the target temperature T1 or not; and in response to the judgment result that the SCR upstream temperature T is smaller than the target temperature T1, the control unit controls the opening degree of the air inlet throttling valve and the opening degree of the exhaust throttling valve through a first program, and the exhaust temperature is rapidly increased. The method has the advantages that different management strategies are provided according to the characteristics of DOC + DPF ...

Method for increasing output of antibacterial peptides of bacillus subtilis through knockout (i)abrB(/i) genes

The invention relates to a method for increasing the output of antibacterial peptides of bacillus subtilis through knockout (i)abrB(/i) genes, and belongs to the field of biotechnology. The method comprises the following steps of: firstly establishing a gene knockout vector pAbrB-Cm by taking bacillus subtilis ATCC9943 as a starting strain and taking a cloning vector pGEM-T of escherichia coli asa skeleton; and establishing a high-yield antibacterial peptide strain FMB29 through a knockout method of genes of a genome abrB of the bacillus subtilis ATCC9943 by applying a double exchange process based on a homologous recombination principle. Through high performance liquid chromatograph, the capacity of producing surfactins and fengycins of improved strains is greatly improved, and the existence of the surfactins and fengycins in fermentation products of improved strains FMB29 is identified through mass spectrum.

Sedimentation calculation method for underground continuous wall with support legs

The invention relates to a sedimentation calculation method for an underground continuous wall with support legs. According to the method, firstly, the underground continuous wall with the support legs is subjected to deformation composition analysis; then, the bottom soil pressure of a wall section and the bottom foundation soil additional stress of the wall section are determined, and the final sedimentation quantity of the bottom foundation soil of the wall section is calculated according to a layered settlement summation method; secondly, the self compression quantity of the support legs per se is calculated; finally, the harmony of the wall section sedimentation and the support leg sedimentation is judged; if the wall section sedimentation and the support leg sedimentation are not coordinated, the bottom soil pressure value of the wall section is regulated. The sedimentation calculation method has the advantages that the special geotechnical engineering investigation is not needed, ...

Immunoliposome based on endostatin gene, preparation method and application thereof

The invention discloses immunoliposome based on endostatin genes, a preparation method and the application thereof. The immunoliposome comprises Vasohibin gene recombination eukaryotic expression vector, liposome and anti-eighth factor-associated antigen monoclonal antibody; wherein the liposome internally wraps up the Vasohibin gene recombination eukaryotic expression vector; the surface of the liposome is connected with the anti-eighth factor-associated antigen monoclonal antibody; the preparation method thereof comprises three steps of: the construction of the Vasohibin gene recombination eukaryotic expression vector, the preparation of the liposome wrapping up the Vasohibin gene recombination eukaryotic expression vector, and the connection of the liposome wrapping up the Vasohibin gene recombination eukaryotic expression vector and the anti-eighth factor-associated antigen monoclonal antibody. The immunoliposome can particularly act on vascular endothelial cells of the lung to inhibit ...

Metal tube cleaning agent

The invention discloses a metal tube cleaning agent consisting of the following components in parts by weight: 1.5 parts of dodecyl dimethyl ammonium oxide, 5.7 parts of gluconic acid, 1.8 parts of acrylic acid sulfonic acid terpolymer, 2.1 parts of benzotriazole, 0.9 part of sodium bromide and 0.3 part of alkanolamide polyoxy ethane ether. The metal tube cleaning agent disclosed by the invention has excellent cleaning power, long rustproof life, low bubble content and long service life.

Method for increasing yield of antibacterial peptide of bacillus subtilis through overexpression of yerP gene

The invention relates to a method for increasing the yield of antibacterial peptide of bacillus subtilis through the overexpression of yerP gene, and belongs to the field of biotechnology. The method comprises the following steps of: constructing a gene overexpression vector pHCMC-YerP by adopting bacillus subtilis ATCC9943 as initial bacterial strain and escherichia coli cloning vector pHCMC04 as a framework, delivering the gene overexpression vector pHCMC-YerP into bacillus subtilis ATCC9943 through electrotransformation to achieve the overexpression of yerP gene, thereby constructing a high-yield antibacterial-peptide bacterial strain FMB45. Verified by high-performance liquid chromatography, the surfactin and fengycin producing capability of the improved bacterial strain is greatly improved.

Method and apparatus for noise estimation in orthogonal frequency division multiplexing system

The invention discloses a method and an apparatus for noise estimation in an orthogonal frequency division multiplexing system, applied to solving the problem of complex noise estimation in the prior art. The method comprises the following steps of: according to a reference signal position of service configuration, aiming at each receiving antenna in a receiving end, performing a frequency domainchannel estimation in each time-slot of a sub-frame to obtain a channel estimation value of a resource block corresponding to the reference signal position of service configuration on a frequency domain of a corresponding time-slot; according to the obtained channel estimation value, selecting a resource block, and converting the channel estimation value corresponding to the selected resource block into channel estimation value on a time domain; calculating a mean power of each time-slot channel estimation value on the time domain outside of a set window length, and taking the mean power as anoise ...

Column reinforcement method after foundation pit deepening

The invention discloses a column reinforcement method after foundation pit deepening. The method comprises the following steps: arranging an auxiliary column beside each column, then digging a foundation pit, and arranging purlin beams and horizontal supporting beams; continuing to dig the foundation pit until the original design depth of the foundation pit is reached, arranging auxiliary purlin beams and auxiliary horizontal beams below the purlin beams on the side wall of the foundation pit, and connecting the upper ends of the auxiliary columns with the lower sides of the auxiliary horizontal beams through bracing mechanisms; digging the foundation pit to the deepened design depth, removing the columns between the bottom surface of the foundation pit and the auxiliary horizontal beams, and enabling reinforcement columns to be supported between the auxiliary horizontal beams and the columns positioned below the bottom surface of the foundation pit; completing the pouring of bottom plates ...

Joint connection method for vertical shaft and open cut foundation pit

The invention relates to a vertical shaft and open cut foundation pit joint connecting method, and belongs to the technical field of foundation pit construction. The vertical shaft and open cut foundation pit joint connecting method comprises the following steps that S1, vertical shaft earthwork is excavated to the shaft bottom, and a plurality of grating assemblies are connected with a vertical shaft; s2, a foundation pit support structure is constructed, earthwork is excavated to a base, and the multiple grating assemblies and foundation pit support pile steel bars are connected together during excavation; and S3, net pieces are hung, and concrete is sprayed to seal the ends, close to foundation pit fender post steel bars, of the grating assemblies. The method has the effect of reducing the construction difficulty.

Supporting structure of large foundation pit

The invention discloses a supporting structure of a large foundation pit. The supporting structure comprises filling piles, which are arranged around the edge of the foundation pit, and first circuit purlin beams connected to the inner sides of the upper ends of the filling piles, wherein a horizontal support beam, which is downwards bent in an arc-shaped manner, is arranged between the first circuit purlin beams on two opposite sides of the foundation pit, the lower side of the horizontal support beam is connected to a plurality of upright posts at intervals, an opposite support mechanism is arranged between the horizontal support beam and each upright post, the lower ends of the upright posts are buried in a soil layer under a base plate of the foundation pit, and a corner support beam is connected between the adjacent first circuit purlin beams at the corner of the foundation pit. According to the supporting structure, the supporting intensity of the large foundation pit is remarkably ...

Method and device for noise estimation in long-term evolution system

The invention discloses a method and device for noise estimation in a long-term evolution system, aiming at increasing the accuracy and smoothness of a noise estimation value. The method comprises the following steps: at least utilizing one receiving antenna at a receiving end to receive signals of a physical uplink shared channel (PUSCH); for each receiving antenna, carrying out frequency-domain channel estimation on the PUSCH to obtain a channel estimation value on each time-slot frequency domain in a subframe; converting the channel estimation value on the frequency domain into the channel estimation value on a time domain; in the time domain, calculating the average power of all time-slot channel estimation values exceeding the set window length, and using the average power as the noise estimation value corresponding to the time slot; selecting a minimum value from the time-slot noise estimation values corresponding to each time slot in one subframe of each receiving antenna; and obtaining ...

Gene variable strain and application thereof in screening of heat-resistant tryptophan production strain

The invention discloses a gene variable strain and application thereof in screening of heat-resistant tryptophan production strains, and belongs to the technical field of tryptophan production. In order to solve the problems of high cost, easy bacterial contamination, narrow application range and the like in industrial production of amino acid, the invention provides a novel method for screening a heat-resistant strain by taking escherichia coli as an industrial production strain. The method specifically comprises the following steps: synthesizing a dnaQ * plasmid of a 3 'exonuclease-epsilon subunit containing DNA polymerase III and having a correction function and a plasmid of a sucrose lethal gene SacB fragment into a vector pRSFDuet-1 to obtain a recombinant vector, introducing the recombinant vector into an escherichia coli competent state through chemical conversion, carrying out continuous high-temperature induction to 44 DEG C by using a 96-deep-well plate, a 24-well plate and a ...

Bearing cleaning agent

The invention discloses a bearing cleaning agent which comprises the following components in parts by weight: 0.6 part of sodium tripolyphosphate, 1.8 parts of isopropyl palmitate, 2.1 parts of sodium dodecyl benzene sulfonate, 0.9 part of ammonium metavanadate, 1.2 parts of tributyl phosphate and 1.1 parts of fatty amine polyoxyethylene ether. The bearing cleaning agent has the advantages of excellent cleaning capability, long rust-proof life, low foaming and long service life.

Tooth brush with medicine for prevention of decayed tooth

The invention relates to a kind of anti-caries medicine tooth-brush, its brush material contains fluoride which can prevent and treat caries disease. Tests conducted in Inst. of Chemistry, Chinese Academy of Sciences, verified that when using said tooth-brush for 3 minutes perday, the amount of fluoride released reaches 1.735 mg in average.

Pure electric ship power distribution system, method and power system

The invention discloses a pure electric ship power distribution system and method and a power system.The pure electric ship power distribution system comprises direct current busbars for receiving electric energy of a battery pack, the direct current busbars are physically isolated, each section of direct current busbar comprises a plurality of sub direct current busbars, the adjacent sub direct current busbars are connected through a sub direct current circuit breaker, and the sub direct current circuit breaker is connected with the direct current busbars; the number of the sub direct current busbars is matched with that of the lithium batteries; the alternating current busbar is used for supplying power to ship propulsion and daily load; and the direct-current and alternating-current conversion module is used for converting the direct current of the direct-current busbar into alternating current and transmitting the alternating current to the alternating-current busbar. Stability of ship ...

Novel bearing detergent

The invention discloses novel bearing detergent. The novel bearing detergent comprises, by weight, 2.4 parts of octadecyl dihydroxy ethyl amine oxide, 6.8 parts of tartaric acid, 3.2 parts of borate, 1.1 parts of heptahydrate, 0.9 part of nonylphenol polyoxyethylene ether and 1.4 parts of quadrol polyoxyethylene polypropylene oxide embedded polyether. The novel bearing detergent has the advantages of excellent cleaning capacity, long rustproof life, little bubble and long service life.

Metal cleaning agent

The invention discloses a metal cleaning agent. The metal cleaning agent comprises the following components in parts by weight: 0.3 part of alkylphenol polyethylene oxide, 1.2 parts of zinc nitrate, 3.4 parts of phosphonic acid, 1.1 parts of isopropyl alcohol, 0.7 part of benzyl triphenylphosphonium bromide and 0.8 part of a polysiloxane polyether copolymer. The metal cleaning agent disclosed by the invention has the advantages of excellent cleaning capability, long antirust period, low foaming and long service life.

Water-based metal cleaning agent

The invention discloses a water-based metal cleaning agent. The water-based metal cleaning agent comprises the following components in parts by weight: 75 parts of de-ionized water, 1-2 parts of hydroxypropyl methyl cellulose, 6-7 parts of isopropanol, 5-6 parts of sodium molybdate, 2-3 parts of triazine polycarboxylic acid compounds, 3-4 parts of diethylene glycol butyl ether, 2-3 parts of sodium benzoate, 1-2 parts of antifoaming agent, 2-3 parts of laurinol, 1-2 parts of sodium gluconate, 6-8 parts of polyoxyethylene stearates, 8-9 parts of polymalic acid, 3-4 parts of dodecanedioic acid, 5-6 parts of fatty alcohol-polyoxyethylene ether, 6-7 parts of benzotriazole, 2-3 parts of iso-tridecanol polyoxyethylene ether, 1-2 parts of preservative, 8-9 parts of triethanolamine, 2-3 parts of vegetable oleic acid, and 2-3 parts of borate. The water-based metal cleaning agent has quicker oil stain removing speed and better low-temperature cleaning effect under normal temperature.

Power distribution system and method for breeding equipment

The invention discloses a power distribution system and method for breeding equipment, the system comprises an intelligent power station and a power distribution subsystem, the intelligent power station is used for being connected with a shore base, the intelligent power station is connected with the power distribution subsystem, and the power distribution subsystem comprises a main power distribution board, a main power generator, a charging and discharging board and a storage battery pack; the intelligent power station is connected with the main distribution board, the main distribution board is connected with the main generator, and the intelligent power station is used for controlling starting or stopping of the main generator based on the control signal and supplying power to the first load or the second load when the main generator is started; the charging and discharging board is connected with the storage battery pack, the storage battery pack is connected with the main distribution ...

Method for increasing output of bacillus subtilis antibacterial peptide through knock-out of phrC gene

The invention relates to a method for increasing output of bacillus subtilis antibacterial peptide through knock-out of phrC genes, and belongs to the technical field of biology. According to the method, a high-yield antibacterial peptide bacterial strain FMB25 is established by constructing a gene knockout vector with bacillus subtilis ATCC9943 as an original strain and escherichia coli cloning vector pGEM-T as skeleton and knocking out the phrC gene of bacillus subtilis ATCC9943 genome through double exchange based on the principle of homologous recombination. According to analysis of high performance liquid chromatography, improved bacterial strains have substantially enhanced capability of yielding surfactin and fengycin.

Method for unfolding cylinder wall of inclined opening ascending seat of transformer

The invention relates to a method for unfolding a cylinder wall of an inclined opening ascending seat of a transformer and belongs to the technical field of transformer panel beating. The technical scheme is as follows: the axial length of any unfolding position of the cylinder wall is equal to that of a shorter edge in the inner side edge of the cylinder wall and the outer side edge of the cylinder wall in the unfolding position; when the length of the inner side edge of the cylinder wall is equal to that of the outer side edge of the cylinder wall, the axial length of the unfolding position of the cylinder wall is equal to that of any side edge. The actual shape of the section of the cylinder wall is the MQPF rectangle (seen in the specification), and a delta H error in the axial direction occurs, so that the axial length of the MQPF rectangle can be obtained by subtracting the delta H only. The method has the following benefits: the accurate unfolding of the cylinder wall of the inclined ...

Protective shed for construction in subway station

The invention relates to the technical field of subway construction, and discloses a protective shed for construction in a subway station, which comprises a plurality of platform flanges and a plurality of protective shed units, each protective shed unit comprises a top protective part and side protective parts which are symmetrically arranged at the two ends of the top protective part and vertically extend downwards, each side protective part comprises two vertical rods which are oppositely arranged, crossed inclined rods are arranged between the adjacent vertical rods, and a protective net is arranged in the upper area of each side protective part; a protection plate is arranged in the lower area of the side protection part, connecting flanges are arranged at the lower ends of the vertical rods, and the connecting flanges and the platform flanges are in one-to-one correspondence and are fixedly installed through fixing bolts; according to the protective shed for construction in the subway ...

Escherichia coli for producing L-tryptophan and application of escherichia coli for producing L-tryptophan

The invention discloses Escherichia coli capable of producing L-tryptophan and application of the Escherichia coli in production of the L-tryptophan, and belongs to the technical field of fermentation. The invention aims to solve the problems of high heteroacid accumulation and high extraction difficulty in the fermentation process of the L-tryptophan strain. The invention discloses a method for producing L-tryptophan at high yield, which comprises the following specific steps: fermenting Escherichia coli XYSH220517-04 at the temperature of 36 DEG C for at least 32 hours. The name of the Escherichia coli is XYSH220517-04, the Escherichia coli is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation date is September 19, 2022, and the preservation number of the Escherichia coli is CGMCC NO.25753. The fermentation performance of the strain is stable, the content of heteroacid in fermentation liquor is obviously reduced, the extraction yield of ...

Double-oxidation ammonia desulfurization process and device

The invention discloses a double-oxidation ammonia desulfurization process and a double-oxidation ammonia desulfurization device. The device comprises an ammonia water preparation device, an absorption tower, a pre-scrubber, a buffer oxidation tank, a cyclone, a centrifugal machine, a drying bed, a tail gas scrubber, a packaging machine and an ammonia water storage tank. Sulfur dioxide is removedfrom flue gas by liquid ammonia, and ammonium sulfate crystals with the purity of over 99 percent are obtained; and the invention has the advantages that: the cost of the conventional ammonia desulfurization is reduced, the absorption efficiency is improved, the desulfurization efficiency is over 95 percent, the yield is improved, the ammonium sulfate crystals with the purity of over 99 percent are obtained, the waste is changed into treasure, economic benefit is increased, the ammonium sulfate yield is over 96 percent, and the ammonia escape volume is reduced and is less than 8mg/m<3>.