Light source and optical measurement system

The invention discloses a light source and an optical measurement system. The light source comprises an ultrahigh pressure mercury lamp, a transmission deuterium lamp configured to allow light from the ultrahigh pressure mercury lamp to transmit the transmission deuterium lamp, and a light collector configured to guide the light from the ultrahigh pressure mercury lamp to transmit the transmission deuterium lamp.

Method for distributing code stream encrypting and decrypting keys in SIP video monitoring system

Ring-shaped nozzle distribution mode for large-area vapor phase epitaxy (VPE) of compound semiconductor

The invention discloses an intersected intensive distribution structure of gas sprayer nozzles for the large-area vapor phase epitaxy (VPE) of a compound semiconductor. The distribution mode is characterized in that each concentric ring-shaped nozzle is independently and closely distributed, and a first precursor nozzle and a second precursor nozzle are separated from each other by an outer-ring inert gas nozzle, so that the different precursors sprayed out of each nozzle are isolated from one another nearby the nozzles, and the pollution of the nozzles can be avoided since the precursors can not be mixed with one another nearby the nozzles to have the chemical reaction. According to the intensive distribution structure of the nozzles, the two precursors can be evenly mixed with each other once deviating from the nozzles and entering a mixed reaction region after being sprayed, so that flow field with even concentration can be formed. Therefore, the homogeneity of the large-area vapor phase ...

Method for finding water and fixing well in magmatic rock hilly area

The invention discloses a method for finding water and fixing a well in a magmatic rock hilly area. The method comprises the following steps: step 1, identifying a satellite image; 2, carrying out geomechanical analysis; 3, field investigation and tracking and field evaluation are carried out; step 4, carrying out geophysical exploration; and 5, determining a well position. According to the method, new technical means such as satellite image recognition and geomechanical analysis are adopted, and conventional technical methods such as hydrogeological survey, ground geophysical prospecting and hydrogeological drilling are combined; a whole set of water exploration and well fixation technical method which is easy to master and convenient to operate and comprises the steps of satellite image recognition, geological stress analysis, investigation and verification, fracture network detection, well position confirmation and drilling and well completion is created, and a three-dimensional comprehensive ...

Construction process of heating system using heating cable for low-temperature radiation

The invention relates to a construction process of a heating system using a heating cable for low-temperature radiation, and the construction steps are as follows: treating the ground and the wall surface before construction, laying a plastic thin film on the ground and the wall surface for performing moisture-proof treatment, flatly laying a thermal insulation layer on the plastic thin film, adopting a non-woven fabric-based aluminum-plated foil or gold-doped aluminum foil paper for flatly laying a reflection layer on the thermal insulation layer, flatly laying a steel wire mesh on the reflection layer, distributing heating cable wires on the steel wire mesh, mounting an external sensor, and mounting a surface layer and a temperature controller. The heating system adopting the heating cable for low-temperature radiation is long in service life and pollution-free, and has the advantages of realizing sub-chamber control, being low in investment cost, being convenient to manage, being sanitary ...

Peeling device for potatoes

The invention relates to a peeling device for potatoes. The peeling device for potatoes comprises peeling equipment (1) and a shell (2), wherein the peeling equipment comprises a machine base (3), a rotary drum (4), a screw-type feeder (5) and a driving device; the rotary drum (4) is arranged on the machine base (3) rotationally; the screw-type feeder (5) is positioned in the rotary drum (4) and is fixedly connected with the inner wall of the rotary drum (4); the driving device is used for driving the rotary drum (4) and the screw-type feeder (5) to rotate together; the shell (2) is detachably arranged in the rotary drum (4); and the screw-type feeder (5) is positioned between the shell (2) and the rotary drum (4). The peeling device for potatoes comprises the shell (2), so the peeling device for potatoes can be used for conveying dried potato raw materials and peeling the fresh potato raw materials and the equipment utilization ratio is effectively improved.

Dual-channel nozzle structure capable of controlling reactant uniform distribution

The invention discloses a dual-channel nozzle structure capable of controlling reactant uniform distribution. The structure comprises a first channel and a second channel; wherein the first channel is an equal diameter cylindrical channel or a variable diameter cylindrical channel, the reactant gas in the first channel is GaCl; the second channel is arranged in the center position of the first channel, the gas in the second channel can be N2 or a mixed gas of GaCl and N2, the second channel can be a cylindrical channel, or the second channel can be composed of two sections, the upper section is in a cylindrical shape and the lower section is in an inverse circular truncated cone shape, and the diameters of the upper section and the lower section on the joint part are equal. The dual-channel structure can improve the reactant GaCl radial distribution uniformity near the substrate surface through optimizing the gas flows in the two channels, and thus the uniform growth of GaN crystal material ...

Medicine with function of relieving cough and reducing sputum

Reliable video system using digital signature technology

The invention discloses a reliable video system using digital signature technology, comprising a video surveillance terminal and a surveillance center; wherein, the video surveillance terminal comprises a video signal collector which is connected with a reliable digital video encoder; the reliable digital video encoder is connected with front-end transmission equipment; the surveillance center comprises central transmission equipment connected with the digital video encoder which is connected with a monitor; the front-end transmission equipment is connected with a front-end memory; the central transmission equipment is connected with a central memory, a control terminal, a certificate management server and a reliability verification server; the reliable digital video encoder comprises an analog video input interface, a digital video coding module, a reliable computing module and a network interface; the reliable computing module is connected with a special security chip. The system can ...

Network video encoder using PS encapsulation technology to carry OSD information

The invention provides a network video encoder using PS encapsulation technology to carry OSD information, relating to digital video encoder in video monitoring system, and mainly aiming at solving the problem of the prior video monitoring system that the key information in displaying in a monitoring center is easy to lose, which is caused by fusing OSD display information in video image information and can not be controlled according to requirement. The invention adopts PS encapsulation technology to store different byte segments encapsulated in the PS data packet instead of fusing video data with OSD information, thus avoiding OSD information from influencing the originally obtained video image information, ensuring effective display of key image information, and greatly reinforcing usability of the recorded and stored video data. The video image information and the OSD information can be resolved respectively at the decoding outputting display terminal, if needing to display OSD information ...

Green prevention and control method for elm goiter aphids

The invention discloses a green prevention and control method for elm goiter aphids. The method comprises the steps of strengthening tree maintenance management, improving ecological regulation and control capacity, and carrying out physical prevention and control, biological prevention and control and drug prevention and control on the elm goiter aphids in different periods. According to the method, pest control is advocated from ecological protection, and plant pests are controlled by economic, simple, convenient, safe and effective coordinated application of environment-friendly measures such as ecological regulation and control, physical prevention and control, biological prevention and control and scientific pesticide application according to local conditions; the insect pests are not completely killed, but are only controlled below a certain economic threshold value, so that forestry-related employees establish an ecological protection concept and a green prevention and control concept ...

Heating device for hydride vapor phase epitaxy (HVPE) growth

The invention relates to a heating device for hydride vapor phase epitaxy (HVPE) growth. The heating device comprises five heating temperature regions, an in-furnace heating module, a heating furnace body and a heating furnace shell, wherein the heating furnace body is divided into an auxiliary heating temperature region and a material growing heating constant-temperature region; each heating temperature region is provided with a plurality of heating modules and internal temperature sensors thereof. With the adoption of the heating device, each heating module and an internal temperature sensor thereof are respectively connected with an automatic temperature controlling circuit, heating power of each heating module is reasonably regulated by the automatic temperature controlling circuit, and combined with a type and a heating mode of each heating module set in the each heating temperature region, temperature of each temperature region is independently and precisely controlled in a preset ...

Group of drugs with antitussive and expectorant functions

The medicine series for stopping cough and dispelling phlegm comprises two drugs. One is made up with chlorpheniramine, probanthine and spiropent for common diseases of respiratory tract and another one for quick treating cold and supervene tracheitis is prepared from chlorpheniramine, probanthine, acetamidophenol, caffeine and artificial bezoar.

PCF-SPR gas sensor and application thereof in methane detection

The invention belongs to the technical field of electronic core industry, and relates to a PCF-SPR gas sensor and application thereof in methane detection. Six large holes are formed in the radial section of the photonic crystal fiber and distributed in a regular hexagon shape, the center of the radial section of the photonic crystal fiber is the same as the center of the regular hexagon formed by the six large holes in position, and a plurality of small holes are evenly formed around the six large holes. The six macropores are averagely divided into two types, the macropores in one type are gas-sensitive pores, and a gas-sensitive metal film layer and a methane-sensitive layer are sequentially arranged in the direction from the pore wall to the pore center; the other type of large holes are temperature-sensitive holes, the hole walls of the temperature-sensitive holes are provided with temperature-sensitive metal film layers, and the temperature-sensitive holes are filled with magnetic ...

Method for conveying material by using screw conveyer

The invention discloses a method for conveying a material by using a screw conveyer. The screw conveyer comprises a shell (1) and a screw propeller (2) placed in the shell (1); a material inlet (3) and a material outlet (4) are formed at two ends of the shell (1) respectively; and the screw propeller (2) comprises a shaft and at least three screw blades. Each screw blade comprises a first part and a second part, the screw blades of the first part are the screw blades close to the material inlet (3), the screw blades of the second part are the screw blades close to the material outlet (4), and the screw pitch of the screw blades of the second part is larger than that of the screw blades of the first part. The method comprises the following steps: adding the material into the shell (1) through the material inlet (3) and conveying the material to the material outlet (4) through the screw propeller (2). The method for conveying the material by using the screw conveyer can be used for remarkably ...

Nozzle distribution mode for compound semiconductor large-area vapor phase epitaxy

The invention discloses a gas sprayer nozzle crossed closely-arranged distribution structure for compound semiconductor large-area vapor phase epitaxy (VPE), which is characterized in that: a first precursor nozzle is separated from a second precursor nozzle by an inert gas nozzle, which separates different precursors from each other near the nozzles, and prevents mixing and chemical reaction of the precursors to cause nozzle contamination. The nozzles are independent of each other and are arranged in an intercrossing manner, so when two precursors are ejected to a mixing and reaction area, the mixing is rapid and uniform, and a flow field with a uniform concentration is formed. The uniformity of compound semiconductor large-area vapor phase epitaxy deposition is significantly improved, and the regulation range of the epitaxial growth technology is enlarged, which facilitates regulation.

Environment-friendly experimental test water sample collection device

The invention relates to the technical field of water sample collection, and discloses an environment-friendly experimental test water sample collection device which comprises a buoy, the lower end of the buoy is fixedly connected with a towrope, the surface of the towrope is provided with a positioning mechanism, the outer side of the positioning mechanism is provided with a water sample collection mechanism, and the lower end of the towrope is fixedly connected with a balancing weight. The water sample collection mechanism comprises an outer box, a through hole is formed in the axis of the outer box, the inner wall of the through hole is fixedly connected with the outer wall of the positioning sliding barrel, a plurality of circumferentially distributed placement holes are formed in the outer box, and sampling bottles are mounted in the placement holes. The water area to be sampled is positioned, the sampling device stays in the water area to be sampled through matching, and water samples ...

Method for distributing code stream encrypting and decrypting keys in SIP video monitoring system

The invention discloses a method for distributing code stream encrypting and decrypting keys in an SIP video monitoring system. In the method, in a process for calling a 3 pcc between code stream encrypting monitoring front end equipment and code stream decrypting customer premise equipment, or a process of calling a 3 pcc between the code stream encrypting monitoring front end equipment and a media server and a 3 pcc between code stream decrypting customer premise equipment and the media server, seeda, seedb and seedc, which are obtained by the monitoring front end equipment, the media server and the customer premise equipment in an identity authentication process during registration, are used as keys shared with an SIP server and identifiers, the content of an SIP signaling message bodySDP is expanded to carry the encrypting and decrypting keys, and a symmetric algorithm or asymmetric algorithm is used to guarantee the safety of the transmission of the encrypting and decrypting keys.

Potato grinding system

The invention relates to a potato grinding system, which comprises a potato peeling device (1) and a grinding device (2), wherein the potato peeling device (1) feeds materials to the grinding device (2); the potato peeling device (1) comprises potato peeling equipment (21) and a shell (22); the peeling equipment comprises a base (23), a rotary drum (24) and a spiral feeder (25); the rotary drum (24) is rotatably arranged on the base (23); the spiral feeder (25) is positioned in the rotary drum (24) and fixedly connected with an inner wall of the rotary drum; the shell (22) is detachably arranged in the rotary drum (24); and the spiral feeder (25) is positioned between the shell (22) and the rotary drum (24). As the potato peeling device in the potato grinding system comprises the shell (22), the potato grinding system not only can be used for grinding dried potato raw materials, but also can be used for grinding fresh potato raw materials, thereby effectively improving the equipment utilization ...

Rare water sample shit drainage device

The utility model discloses a rare water sample shit drainage device, including the drainage tube body, one end an organic whole of drainage tube body is connected with and is used for placing the intrarectal spheroid in the patient, and spheroid's cavity is linked together with the inner chamber of drainage tube body, and the first drainage hole that is used for rare water sample stool to pass through is offered at spheroid's top, first drainage hole all around and extend all over around the one of which and be equipped with a plurality of second drainage holes, on the drainage tube body, and lie in the spheroid end and be provided with the sacculus that prevents spheroid and come off from the rectum, the other end of drainage tube body can be dismantled and be connected with vacuum device, the diameter in first drainage hole is greater than the diameter in second drainage hole. This rare water sample shit drainage device can not cause the stimulation to patient's intestinal.

Reactor for hydride vapour phase epitaxy (HVPE)

The invention discloses a reactor for vertical hydride vapour phase epitaxy (HVPE), which comprises an axisymmetric cylindrical cavity, a precursor channel, a substrate, a graphite disc and a support bar, wherein the precursor channel, from top to bottom, is sequentially composed of a first cylinder, a transition section, a second cylinder, a skirt extension section and a third cylinder; the reactor also comprises a second rectifying plate and a first baffling device, wherein the second rectifying plate is arranged at the central position of the second cylinder, and the first baffling device is arranged in the third cylinder and provided with a circumferential array baffling plate; or the reactor also comprises first, second and third rectifying plates and a second baffling device, wherein the first, second and third rectifying plates are respectively arranged in the first, second and third cylinders of the channel, and the second baffling device is arranged at the radial periphery of the ...

Satellite positioning data encryption system and method

The invention relates to a satellite positioning data encryption system and method. Front-end equipment of the system controls a processor through the front end to process information received by a satellite receiver, and processed information is stored in a storage and sent to a communication link through a data transmission device; a central data transmission device receives the information sent by the communication link, the information is transmitted to a central control processor and stored in a central storage, and the processed information is sent to a showing device and an application system; a front-end control processor is connected with an encryption/signature verification chip used for performing encryption on the information received by the satellite receiver and performing verification on a received control command, and the central control processor is connected with a decryption/ signature verification chip used for performing decryption on the information received by the ...

Network video encoder using PS encapsulation technology to carry OSD information

The invention provides a network video encoder using PS encapsulation technology to carry OSD information, relating to digital video encoder in video monitoring system, and mainly aiming at solving the problem of the prior video monitoring system that the key information in displaying in a monitoring center is easy to lose, which is caused by fusing OSD display information in video image information and can not be controlled according to requirement. The invention adopts PS encapsulation technology to store different byte segments encapsulated in the PS data packet instead of fusing video data with OSD information, thus avoiding OSD information from influencing the originally obtained video image information, ensuring effective display of key image information, and greatly reinforcing usability of the recorded and stored video data. The video image information and the OSD information can be resolved respectively at the decoding outputting display terminal, if needing to display OSD information ...

Reliable video system using digital signature technology

The invention discloses a reliable video system using digital signature technology, comprising a video surveillance terminal and a surveillance center; wherein, the video surveillance terminal comprises a video signal collector which is connected with a reliable digital video encoder; the reliable digital video encoder is connected with front-end transmission equipment; the surveillance center comprises central transmission equipment connected with the digital video encoder which is connected with a monitor; the front-end transmission equipment is connected with a front-end memory; the central transmission equipment is connected with a central memory, a control terminal, a certificate management server and a reliability verification server; the reliable digital video encoder comprises an analog video input interface, a digital video coding module, a reliable computing module and a network interface; the reliable computing module is connected with a special security chip. The system can ...

Cutting mechanism suitable for sundry removing device of corn kernel harvester

The utility model relates to a cutting mechanism applicable to a sundry removing device of a corn kernel harvester, which comprises a fixed cutter assembly and a movable cutter assembly, the fixed cutter assembly is arranged at the upper part, and the movable cutter assembly is arranged below the front side of the fixed cutter assembly; the fixed cutter assembly is composed of a fixed cutter base and a fixed blade installed on the front side of the fixed cutter base, the cutting edge of the fixed blade is arranged downwards, and the two ends of the fixed cutter base are fixed to the left cutting support and the right cutting support. The movable cutter assembly is composed of a movable cutter shaft welding part and a plurality of movable blades which are evenly distributed and detachably fixed to the outer circumferential surface of the movable cutter shaft welding part, the movable cutter is arranged in the mode that a cutting edge faces outwards, and the two ends of the movable cutter ...

Precursor flow field control rod

The invention discloses a hydride vapor phase epitaxy (HVPE) nozzle design, and particularly provides a rod for controlling a precursor flow field. In a precursor channel of a vertical HVPE growth system, the control rod comprises a head annular structure, a middle solid cylinder and a tail control end, which are coaxial to one another, wherein the annular structure has an inner side and an outer side and comprises a plurality of circular through holes; at least one of the circular through holes penetrates through the inner and outer sides of the annular structure; the outer diameter of the annular structure is equal to the diameter of the middle cylinder; the tail control end adjacent to the middle cylinder has one of a conical structure, a circular-truncated-cone-shaped structure, an inverted-circular-truncated-cone-shaped structure or a cylindrical structure; the diameter of a joint of the control end and the middle cylinder is equal to that of the middle cylinder. According to the precursor ...

Reactor and method for vapor phase epitaxy of nitride semiconductor material

The invention discloses a reactor and a method for hydride vapor phase epitaxy (HVPE) of a nitride semiconductor material. The reactor comprises an axial symmetrical cylindrical reaction cavity, a concentric annular spray nozzle, a heater, a graphite boat, a substrate and the like, wherein the graphite boat and the substrate are heated by adopting resistance wire or infrared light irradiation; three to six gas outlet channels with rectangular cross sections are arranged in the tangential direction of the outer wall of the bottom end of the cavity; a concentric annular buffer strip is arranged among the outlet channels and the inner wall of the cavity, and a concentric annular flow collecting channel is arranged on the peripheries of the outlet channels; the outlet channels are communicated with the flow collecting channel. The reactor disclosed by the invention has the advantages that reactant gas forms micro-rotational flow in the effective growing zone of the substrate, so that the epitaxial ...

Plant lactobacillus capable of reducing acrylamide content of food and application thereof

The invention discloses plant lactobacillus capable of reducing acrylamide content of food and application thereof, and belongs to the technical field of biological food processing. The plant lactobacillus CCFM382 is collected in China General Microbiological Culture Collection Center on September 25, 2014, with the collection number of CGMCC 9734. An application method of the plant lactobacillus to processing of baked and fried starches has the characteristics of simple process, low cost, suitability for large-scale industrial production and the like; the acrylamide content of a processed product is significantly lower than that of a sample in a blank control group; the product is nutritional, healthy, and better in flavor and taste, can meet market demands of current consumers, and has a good market prospect.

Potato grinding system

End-to-end service deployment method and electronic equipment

The invention provides an end-to-end service deployment method and electronic equipment, and relates to the technical field of communication, and the method comprises the steps: obtaining network state information and transmission quality demand information of a target service; determining an end-to-end service path according to the network state information and the transmission quality demand information; an ordered virtual network function VNF sequence of the target service is deployed in the end-to-end service path, the end-to-end delay of the target service in the end-to-end service path after the VNF sequence is deployed is smaller than a preset threshold, and the end-to-end delay comprises the weighted sum of at least two delays as follows: processing delay; queuing and delaying; carrying out transmission delay; and propagation delay is carried out. In the end-to-end service deployment process, the network state information and the transmission quality demand information of the target ...

Reaction device for stabilizing conversion rate

The invention discloses a reaction device in which a gaseous reactant (abbreviated as a first precursor) and a solid or liquid reactant (abbreviated as a second precursor) participate in reactions. A structure of a special flow guiding pipe and a special baffle plate is adopted, so that the full contact of the reactants is facilitated, and the problems that the utilization rate of the first precursor is low, the conversion rate of the first precursor is greatly affected by the consumption of the second precursor and the like are effectively solved. Thus, the production cost is lowered due to a high conversion rate, and the process difficulty is decreased due to a stable reaction rate.

Digital video decoding system

The invention discloses a digital video decoding system comprising a microprocessor, a decoding calculation unit, a D/A converter, a video amplifier and a network interface, wherein the decoding calculation unit at least comprises a first algorithm decoding calculation unit and a second algorithm decoding calculation unit, and the microprocessor is also provided with a decoding pretreatment module. The digital video decoding system of the invention better solves the real-time decoding of the digital video flows of two decoding formats, i.e. the MPEG-4 standard and the H.264 standard and the self-adaptive decryption of the encrypting code stream, and can better satisfy the compatibility demand on equipment in practical application and high-safety application of the monitoring system.

Green prevention and control method for Chinese scholartree inchworm

The invention belongs to the technical field of forest pest control, and discloses a Chinese scholar tree inchworm green control method, which comprises the following steps: fertilizing, loosening soil and pruning a Chinese scholar tree planting field, and keeping ventilation and light transmission conditions; the method comprises the following steps: manually stirring tree crowns to kill young larvae, winding adhesive tapes with outward adhesive surfaces on tree trunks to adhere and trap newly emerged imagoes and mature larvae pupating in soil, trapping and killing the imagoes by utilizing a solar insect trapping lamp, and trapping the mature larvae pupating in soil by utilizing a wet soil cake; biological control of the inchworm is realized by releasing natural enemy insects, fungi and nematodes of the Chinese scholartree inchworm, and finally green control of the Chinese scholartree inchworm is performed by using the novel biopesticide. According to the method, a green prevention and ...

Screw conveyor

The invention discloses a screw conveyor which comprises a shell (1) and a screw propeller (2) placed in the shell (1); a material inlet (3) and a material outlet (4) are formed at two ends of the shell (1) respectively; the screw propeller (2) comprises a shaft and at least three screw blades; and clearances are reserved between the outer edges of the screw blades and the inner wall of the shell (1). The screw blade comprises a first part and a second part, the screw blades of the first part are the screw blades close to the material inlet (3), the screw blades of the second part are the screw blades close to the material outlet (4), and the screw pitch of the screw blades of the second part is larger than that of the screw blades of the first part. The screw conveyor disclosed by the utility model can be used for remarkably overcoming the problem of material blockage in the shell, greatly reducing the time of shut down for cleaning, and further remarkably improving the production efficiency ...

Controllable precursor passage

The invention discloses a hydride vapor phase epitaxy (HVPE) spray nozzle design, and particularly provides a controllable precursor passage. The passage is located in a suspended upright or inverted support HVPE system and comprises a precursor air inlet, a passage top fixed end, a central control rod and a passage outer wall, wherein the air inlet is located between the top of the passage and the top end of the passage outer wall; an upright screw stud is embedded in the top of the passage; the control rod is located in the central position of the passage and divided into an upper section and a lower section; the upper section is a cylinder of which the top end is provided with an inner threaded sleeve hole; the lower section is a cone-shaped, circular truncated cone-shaped, inverted circular truncated cone-shaped or cylinder-shaped control end; the passage outer wall at least comprises two or more cylinders of different diameters, wherein the diameter of the first cylinder is smaller ...

Graphene-sensitized optical fiber lactic acid sensor and preparation method thereof

The present invention discloses a graphene-sensitized optical fiber lactic acid sensor and a preparation method thereof. The sensor comprises: an optical fiber and a nickel coating; a graphene layer is grown at a polishing area after the optical fiber is fused and tapered, and the nickel coating is coated at the graphene layer. A single-mode optical fiber is tapered, and graphene is directly grown at a polishing area of the optical fiber by a chemical vapor deposition method to form a complete and uniform graphene layer, so that a nickel-sensitive material is stably bound with the optical fiber to fabricate a novel graphene-based optical fiber lactic acid sensor, which has good linear fit and repeatability for low-concentration lactic acid measurement.