144results about How to "Increase use" patented technology

The invention relates to the technical field of biology, and discloses a novel polyurethane plastic degrading enzyme and application thereof. The amino acid sequence of the novel polyurethane plastic degrading enzyme MBX1 provided by the invention is as shown in SEQ ID No. 1; the sequence of the coding gene is as shown in SEQ ID No.2. Escherichia coli engineering bacteria constructed by using the coding gene sequence can efficiently express the novel polyurethane plastic degrading enzyme. The method specifically comprises the following steps: cloning an MBX1 gene; the preparation method comprises the following steps: constructing a pET28a-MBX1 expression vector; expression, purification and functional verification of MBX1 protein; the degradation rate of the novel polyurethane plastic degrading enzyme to polyether polyol type polyurethane within 8 hours at the temperature of 50 DEG C and the pH value of 7.5 is 98%. The novel polyurethane plastic degrading enzyme can be applied to biological treatment and related research and development of polyurethane plastics, and has a huge application prospect in biodegradation of the polyurethane plastics.

The invention belongs to the technical field of full-automatic bulk material packaging, and particularly relates to a multi-purpose full-automatic bulk material packaging method and equipment. The method comprises the following specific steps that a first electromagnetic clutch and a second electromagnetic clutch are disconnected, a main motor is started, at the moment, an arch breaking blender in a stock bin works, and the main motor is started; and after a material containing space V12 of the cross-shaped material fixing bin is filled with the evenly-mixed materials, the second electromagnetic clutch is closed, and chain transmission drives the cross-shaped material fixing bin to rotate clockwise. The machine can be conveniently and correspondingly adjusted by personnel according to the shape and the size of the matrix bag, so that time can be saved and labor intensity can be reduced to a certain extent. In addition, the application range can be widened, application is expanded, the structure is simplified, and cost investment is reduced.

The invention discloses an insulator convenient to connect with a cross arm, and relates to the technical field of insulators, the insulator comprises an insulating part, a steel foot fixedly connected to the bottom of the insulating part and a mounting seat with a mounting hole, the steel foot is rotatably connected to the mounting seat through a hinged support, and the axial direction of the hinged support is parallel to a wire slot in the top of the insulating part. A lantern ring is arranged on the hinged support in the axial direction of the insulating part in a relatively rotating mode, a first positioning ring and a second positioning ring are fixedly connected to the lantern ring, and when the insulating part is vertically installed, the first positioning ring and the mounting hole are coaxial; and when the insulating part is installed at an inclined angle alpha, the second positioning ring and the mounting hole are coaxial. The mounting angle of the insulating part can be changed through the hinged support, the first positioning ring, the second positioning ring and the lantern ring are arranged, the insulating part can be locked in a vertical state or an inclined state, and the application range is widened. And the connection between the mounting seat and the cross arm and the angle locking of the insulating part can be realized only through a group of bolt connection pairs, so that the mounting is very convenient, and the connection is firm.

The utility model relates to the technical field of power electronic devices, in particular to a double-sided heat dissipation silicon carbide power module packaging structure, which comprises a plurality of silicon carbide power devices, an upper ceramic substrate and a lower ceramic substrate. The silicon carbide power devices are placed on the copper layer through the upper nano-silver sintering layer, the metal gasket and the lower nano-silver sintering layer, the silicon carbide power devices on each ceramic substrate are connected through the metal connecting wire, the upper ceramic substrate and the lower ceramic substrate are connected through the metal connecting column, and the radiators are arranged outside the upper ceramic substrate and the lower ceramic substrate respectively. According to the structure, the double-sided radiator and the nano-silver sintering material are used, so that the heat dissipation performance of the whole module is improved, the service life of a packaging body is prolonged, and the packaging body is more aging-resistant.

The telescopic variable-pitch cross-medium propeller mechanism comprises a vane seat shell, a supporting frame is arranged in the vane seat shell, an electric telescopic rod assembly is arranged on the supporting frame, vane assemblies are connected to the left end and the right end of the electric telescopic rod assembly in a threaded mode, each vane assembly is formed by sleeving a plurality of multi-section vanes, and the vane seat shell and the electric telescopic rod assembly are connected in a threaded mode. The front end of the electric telescopic rod assembly is connected with a wing piece at the foremost end of the wing piece assembly, and the wing piece assembly is driven by the electric telescopic rod assembly to stretch and retract. Appropriate lift force is provided for the cross-medium aircraft or the aircraft, modular design is adopted, wing panel serialization design can be carried out according to the load requirement of the cross-medium aircraft or the aircraft, the wing panel extends into a large wingspan during air flight, the wing panel contracts into a small wingspan during underwater navigation, and the screw pitch of the propeller is increased.

The invention provides an organic selenium-rich microbial inoculum as well as a preparation method and application thereof, and relates to the technical field of microbial inoculum. The organic selenium-rich microbial inoculum comprises selenium-substituted amino acid; based on 100 parts by mass of organic selenium, the content of the seleno-amino acid in the organic selenium-rich microbial inoculum is not less than 5%. The invention further provides a preparation method and application of the organic selenium-rich microbial inoculum. The organic selenium-rich microbial inoculum provided by the invention overcomes the defect that the conversion rate is low when inorganic selenium is converted into organic selenium by microorganisms in the prior art.

The invention relates to the technical field of medicines, in particular to application of combination of an adenosine A1 receptor stimulant and a dopamine D2 receptor stimulant in preparation of a medicine or food for preventing oxygen poisoning of a central nervous system. The invention provides a new application of a combined adenosine A1 receptor stimulant and a dopamine D2 receptor stimulant. Animal experiments prove that the combined adenosine A1 receptor stimulant CCPA and the dopamine D2 receptor stimulant bromocriptine can effectively delay the oxygen poisoning phenomenon of a central nervous system. Compared with the traditional method for preventing oxygen only by strictly limiting the pressure and time of oxygen inhalation, the method provided by the invention can be used for inhaling oxygen for a longer time under higher pressure, so that the application of hyperbaric oxygen in diving and hyperbaric medicine is further expanded.

The invention provides a privacy protection federated aggregation method based on multi-client inner product function proxy re-encryption, which comprises the following four steps: an initialization stage, a local training stage, a federated aggregation stage and a parameter updating stage, and specifically comprises the following steps: the initialization stage: step 110, a key generation center (KGC) inputs a security parameter lambda and calls a group generation algorithm; according to the multi-client inner product function proxy re-encryption-based privacy protection federated aggregation method provided by the invention, the computing load is mainly in a parameter aggregation stage of the central server, so that the computing power advantage of the central server can be fully utilized, and the resource overhead of the clients is reduced; in a parameter transmission process, an inner product function encryption mode is adopted to encrypt model parameters, and meanwhile, a semi-honest central server is ensured not to contact plaintext information of any parameter through a proxy re-encryption thought, so that the security of related parameters is ensured, and the privacy of local data is further ensured.

The application discloses a modified asphalt for water-based drilling fluid and a preparation method thereof. The modified asphalt for water-based drilling fluid comprises the following raw material components: pretreated reducing slag, acid anhydride modifier, initiator, stabilizer, modifier, modification aid and performance regulator. The modifier is low-grade sulfur. The pretreated reducing slag comprises the following raw material components in weight: inferior reducing slag: 100 parts; oil sand asphalt: 20-60 parts; and pretreatment agent: 0.1-2 parts. The high-softening-point asphalt with high softening point and good hydrophilicity is obtained by modifying the difficult-to-handle inferior reducing slag and oil sand asphalt, and is suitable for being used as main material for producing asphalt water-based drilling fluid.

The present invention relates to a drug carrier based on bacterial cell membrane and its preparation method and application. The nano drug composition of the present invention includes a drug and a bacterial cell membrane drug-carrying system, wherein the bacterial cell membrane drug-carrying system encapsulates the drug; the bacterial cell membrane drug-carrying system includes a bacterial cell membrane and a liposome; the bacterial cell membrane is wrapped outside the liposome; it can be efficiently enriched in the tumor site, release a drug that can kill Fusobacterium nucleatum, effectively alleviate the immunosuppressive microenvironment caused by Fusobacterium nucleatum, restore the response of colon cancer to anti-cytotoxic T lymphocyte-associated antigen 4 therapy and anti-programmed death receptor therapy, and can also effectively alleviate the resistance of Fusobacterium nucleatum to chemotherapy drugs, and restore the responsiveness of the tumor to the chemotherapy drug 5-fluorouracil. The nano drug composition can also kill a variety of bacteria in the breast cancer tumor site to alleviate tumor metastasis caused by tumor bacteria, and restore the responsiveness of the tumor to the combined chemotherapy regimen.

The invention relates to a transmission line iron tower angle steel-steel pipe mixed main material transition node structure used for connecting an upper main material and a lower main material at a transmission line iron tower transition node. The upper and lower main materials at the transition node are angle steel and steel pipes respectively; the transition joint structure comprises a shoe plate, a transition plate and an annular stiffening plate. The shoe plate is parallel to the angle steel in arrangement direction, the cross section of the shoe plate is cross-shaped, and four shoe plate side edges are formed; the upper main material at the transition node comprises two steel angles, the two steel angles are arranged at two opposite angles of the shoe plate, the two side edges of the steel angles are attached to the side edges of the shoe plate respectively, and the shoe plate is fixedly connected with the steel angles through bolts; the transition plate is welded to the bottom of the shoe plate and is perpendicular to the shoe plate, the steel pipe is welded to the bottom face of the transition plate, the annular stiffening plates are arranged in the circumferential direction of the steel pipe, the tops of the annular stiffening plates are welded to the transition plate, and the side faces of the annular stiffening plates are welded to the outer wall of the steel pipe. According to the transition joint structure, main materials of the iron tower can adopt a structural form of combining angle steel and steel pipes, and the advantages of the angle steel and the steel pipes are exerted.

The present invention relates to a reinforcing material (1) made from the following: a unidirectional reinforcing layer (2) formed by one or more carbon reinforcing threads (3) combined with a polymer fiber layer (4, 5) on each side thereof, wherein the polymer fiber layer is selected from a non-woven web, the polymer part of the reinforcing material accounting for between 0.5% and 10% of the total weight of the reinforcing material (1) and preferably between 2% and 6% of its total weight, the unidirectional reinforcing layer (2) comprising one or more reinforcing threads (3) individually twisted according to a twist of 3 to 15 rpm, preferably 6 to 12 rpm.

The utility model belongs to the technical field of testing devices, and particularly provides a downhole casing erosion simulation testing device. The underground casing pipe erosion simulation test device comprises an erosion test box, a stirring system and a sand blasting pipeline for communicating the erosion test box with the stirring system, the erosion test box is communicated with a sand-liquid separation tank, and the sand-liquid separation tank is provided with a sand discharge port and a liquid circulation port and is communicated with the stirring system through the liquid circulation port. According to the utility model, the sand-carrying liquid after the test flows into the sand-liquid separation tank, the sand-carrying liquid is precipitated in the sand-liquid separation tank to form a sand layer and a liquid layer, the test sand can be unloaded from the sand unloading port and is convenient to recycle, and the liquid flows to the stirring system from the liquid circulation port to directly complete secondary recycling. Compared with the prior art, the sand-carrying fluid in the erosion test box disclosed by the utility model is convenient to clean and can be directly recycled, so that the cleaning and recycling efficiency of the sand-carrying fluid is improved.

The utility model discloses a leisure chair frame convenient to disassemble and assemble, and relates to the field of chair frame devices. The leisure chair frame convenient to disassemble and assemble comprises a chair and a chair back rotationally connected to the top side of the chair, and chair legs are rotationally connected to the bottom of the chair; a dismounting assembly is arranged at the top of the seat and comprises a handrail rod and a multifunctional supporting rod. According to the leisure chair frame convenient to disassemble and assemble, the rotating chair back and the armrest rod are arranged on the chair frame and are sequentially rotated, so that the chair back and the chair can be located on the same plane to be used as a bed product, the chair back and the chair can be folded and combined, the chair frame can be conveniently carried on the outer side, and the purpose of the chair frame is increased; secondly, the bottom bag and the side bag which are convenient to disassemble and assemble are arranged on the chair frame, so that disassembling and assembling tools and camping supplies are convenient to place.

The utility model belongs to the technical field of die structures, and particularly relates to a multipurpose die structure for forging and pressing. The stamping device comprises a stamping main machine, a die assembly lower portion is arranged through the stamping main machine, a die assembly upper portion is arranged in the upper portion of the die assembly lower portion, rotating columns are arranged in the two sides of the die assembly lower portion, L-shaped clamping pieces are arranged on the rotating columns, and jacking column assemblies and first springs are arranged between the upper portions of the side faces of the L-shaped clamping pieces and side groove portions. An L-shaped clamping piece is arranged between the lower portion of the mold assembly and the upper portion of the mold assembly, one end of a pressing column is arranged on the lower portion of the side face of the L-shaped clamping piece, the other end of the pressing column is inserted into the side wall of the lower portion of the mold assembly, and meanwhile a check block arranged on the pressing column is matched with a second spring arranged in the lower portion of the mold assembly. The die can be replaced conveniently, the purposes of the die are increased, the working time is shortened, and the working efficiency is improved.

The present invention provides a preparation method of a ring (tyrosine valine), characterized in that the following steps are adopted: step A: preparing a raw material extract using yellow water as raw material; step B: subjecting the raw material extract obtained by step A to reduced pressure distillation to obtain a ring (tyrosine valine) crude extract; step C: diluting the ring (tyrosine valine) crude extract obtained by step B with ethanol and water to obtain a diluent, subjecting the diluent to chromatography using a resin column to obtain a chromatographic liquid, concentrating the chromatographic liquid to obtain a ring (tyrosine valine) crude product; step D: subjecting the ring (tyrosine valine) crude product obtained by step C to reverse phase column separation to obtain a separation liquid, concentrating and crystallizing the separation liquid to obtain a ring (tyrosine valine) pure product. The raw materials of the present invention are easily available, the method is simple, and the product purity is more than 95%, which can provide a technical basis for the separation and preparation of other peptide compounds in yellow water.

The invention relates to the technical field of metal hydrogen embrittlement evaluation tests, in particular to a hydrogen embrittlement test method and device for slow strain tensile test evaluation.The hydrogen embrittlement test device comprises a test bed, a traction assembly and a servo motor, the traction assembly is fixedly installed above the test bed, and the traction assembly internally comprises a screw, a sliding rail, a sliding block and a fixing plate installed on the sliding block; the servo motor is fixedly installed above the traction assembly, an output shaft of the servo motor is fixedly connected with the end of a screw in the traction assembly through a coupler, and traction discs are symmetrically installed in the middle of a fixing plate in the traction assembly and on the upper portion of the test bed. The detachable and replaceable traction disc is used as a fixing assembly for a tensile test detection material, a mutually independent and stable clamping mode is provided for multiple test materials, the limitation of a current traditional tensile test platform on material selection is avoided, and the application scene and purpose are improved.

The utility model provides a wave recording isolation sampling circuit which comprises a sampling assembly, an isolation module, a signal conditioning module and a micro-control unit. An ADC module is arranged in the micro-control unit, the sampling assembly is connected to a DC power supply of the feeder terminal and is electrically connected with the isolation module, the signal conditioning module is electrically connected with the isolation module, and the signal conditioning module is electrically connected with the ADC module in the micro-control unit; the isolation efficiency of the system is improved, the improvement is favorable for improving the safety of the system, the sampling accuracy is also effectively improved, and the recording data of the generated recording file can be ensured to be more reliable, so that more accurate data analysis and fault diagnosis are facilitated.

The invention provides an aluminum coin-shaped product and a production process and application thereof, and relates to the technical field of aluminum products. The invention relates to an aluminum coin-shaped product, which is prepared by the following steps of: stamping an aluminum plate or slicing an aluminum bar to manufacture an aluminum sheet; the aluminum sheets are subjected to numerical control machining to be manufactured into aluminum wafers of different sizes, then oxidation, dyeing and printing are conducted, and a finished product is obtained; the oxidation process comprises the following steps: firstly, deoiling and descaling an aluminum wafer, and then carrying out oxidation treatment by using an anodic oxidation electrolyte. The aluminum coin-shaped product is easy to operate and convenient to produce, the aluminum coin-shaped product which is good in texture and high in strength and has the metallic luster sense can be obtained, and meanwhile the aluminum coin-shaped product further has good abrasion resistance and light weight.

The present invention provides a method for preparing a lead ion fluorescence detection tool, which belongs to the technical field of luminescent materials. 2+ The CH 3 NH 3 Br or CsBr ligands, lead ion fluorescence detection tools are prepared on different substrates; wherein, a solution containing lead ions is titrated onto the prepared lead ion fluorescence detection tool to generate a sample, and the lead ion concentration is judged according to the change in the fluorescence intensity of the sample. The pretreatment of the substrate of the present invention can improve the film forming rate, and the prepared film and test paper are dense and uniform, without holes and cracks; according to the different properties of different perovskite materials and substrates, the preparation method can be flexibly selected to reduce the production cost of the product and improve the efficiency of the product; the prepared portable detection film and test paper are low-cost, non-toxic and harmless; the use of perovskite fluorescent materials is expanded, and other heavy metal fluorescence detection test papers can be prepared.

The application discloses a kind of safety belt electric cleaning device for electrical equipment, it is related to electromechanical equipment technical field, technical scheme is, including insulating shell, insulating rope, insulating support rod, multiple insulating balls are fixedly installed on the insulating rope, recycling passage, communication passage, air injection passage, sponge barrel are equipped in the inside of insulating shell, the inside of sponge barrel is equipped with multiple evenly distributed annular protrusions, six struts are further equipped in the inside of sponge barrel and are arranged according to annular array with sponge barrel as center, fixed end cap is fixedly connected to one end of the strut, movable end cap is installed to the other end of the strut, dirt on the surface of electrical equipment is dissolved by cleaning fluid and is carried away by insulating rope and insulating ball, avoid dirt and insulating cleaning fluid to splash to the surface of electrical equipment around, all the devices are made of insulating material, can be charged cleaning to electrical equipment.

The invention provides an anti-helicobacter pylori wood frog antibacterial peptide preparation and a preparation method thereof. The wood frog antibacterial peptide preparation comprises a polysaccharide modified wood frog antibacterial peptide concentrated solution. The wood frog antibacterial peptide preparation can keep the antibacterial effect and antioxidant activity for a long time in a low-pH gastric juice environment, is expected to serve as an oral medicine to kill helicobacter pylori in the gastric environment, and provides a new medicine for treating helicobacter pylori infection.

The invention discloses an analysis method for quantitatively measuring fumaric acid by adopting an ultraviolet spectrophotometric method based on copper sulfate, and belongs to the technical field of test and analysis of physical and chemical properties of materials. The method comprises the following steps: 1, preparing a plurality of fumaric acid standard solutions with different concentrations, preparing a copper sulfate solution, mixing the fumaric acid standard solutions with the copper sulfate solution, and carrying out a complex reaction; 2, performing ultraviolet spectrophotometry after the reaction is completed, determining the maximum absorption wavelength of the complex, and drawing a standard curve; and 3, dissolving a to-be-detected sample in water to obtain a to-be-detected sample solution, adding a copper sulfate solution, mixing, carrying out a complex reaction, carrying out ultraviolet spectrophotometric determination after completion of the complex reaction to obtain absorbance at the wavelength of 804 nm, and substituting the absorbance into the equation of the standard curve to obtain the concentration of fumaric acid in the to-be-detected sample. The method has the advantages of simplicity and convenience in operation, low cost, high sensitivity and the like, and is widely applicable to quantitative analysis of fumaric acid in environmental samples, food samples, medicines and industrial products.

The present invention relates to the technical field of metal hydrogen embrittlement evaluation test, in particular to a hydrogen embrittlement test method and device for slow strain tensile test evaluation, comprising a test bench, a traction component and a servo motor, wherein the traction component is fixedly installed above the test bench, the traction component comprises a screw, a slide rail, a slider and a fixed plate installed on the slider, the servo motor is fixedly installed above the traction component, and the output shaft of the servo motor is fixedly connected to the end of the screw in the traction component through a coupling, and a traction disc is symmetrically installed at the middle of the fixed plate in the traction component and the upper part of the test bench, the present invention utilizes a detachable and replaceable traction disc as a fixed component for tensile test detection materials, and provides a mutually independent and stable clamping method for a variety of test materials, thereby avoiding the limitations of the current traditional tensile test platform on material selection and improving applicable scenarios and uses.

The invention relates to an aluminum composite material containing metal and / or ceramic and graphite, which is formed by compounding a carbon-graphite material and an aluminum material, has high strength, high heat conductivity coefficient and low thermal expansion coefficient, and can be widely used in industry, and provides a technology for developing the material. The present invention relates to an aluminum composite material containing a metal and / or a ceramic and graphite and a method for producing the composite material, the aluminum composite material containing a metal and / or a ceramic and graphite being obtained by compositing a molded body using a melt of an aluminum metal or an aluminum alloy, a metal and / or ceramic and graphite-containing aluminum composite material which is formed from a material obtained by adding a silica-based binder to the outside of a mixed powder that contains a graphite powder that is not amorphous and a metal powder and / or a ceramic powder, and which has a bending strength of 90 MPa or more. The thermal conductivity in either the XY direction or the Z direction is 240 W / m.K or more, and the thermal expansion coefficient in either the XY direction or the Z direction is 6.0 ppm / K or less.

The present invention provides a method for preparing a multi-purpose gallium oxide suspended transistor array, which can be used as a solar-blind detector. Combining the two deep ultraviolet detection modes of gallium oxide, the photoconductive mode and the resonant mode, can effectively make up for the shortcomings of a single mode and improve the dynamic range and target accuracy of the detector. It can also be used as a transistor. Compared with traditional silicon-based circuits, the circuit using gallium oxide wide bandgap semiconductor materials has higher power density and lower power consumption. The present invention adopts a wafer-level suspended gallium oxide transistor preparation process to further increase the versatility of the device and reduce costs. It has good application prospects and is also in line with the future development direction of device integration and miniaturization.

The utility model discloses a powder coating structure for a color steel plate, which comprises a steel plate frame, a support frame is fixed inside the steel plate frame, rock wool fillers are arranged inside the steel plate frame and on the outer side of the support frame, and the powder coating structure for the color steel plate is characterized in that the support frame is designed into an X-shaped structure. The supporting frames are distributed in the steel plate frame at equal intervals, so that the overall strength of the color steel plate is improved, the deformation probability of the color steel plate is reduced, and the color steel plate has high weather resistance and high chemical stability due to the fluorocarbon paint layer on the color steel plate, is suitable for being used in an acid rain corrosion environment and can be used in a severe environment, and the service life of the color steel plate is prolonged. And due to the gray aluminum powder graphite alkyd paint layer on the color steel plate, the color steel plate has the advantages of good mechanical property, high hardness and good wear resistance, the probability that the paint surface is damaged by foreign objects is reduced, the color steel plate is well protected, and the service life of the color steel plate is prolonged.

The present invention addresses the problem of providing a halogenated polymer having excellent heat resistance and whiteness compared to known halogen-containing polymers. According to the technical scheme for solving the technical problem, the invention provides the halogenated polymer which contains bromide ions and is represented by the following general formula (1), and the content of the bromide ions is 1-2000ppm. # imgabs0 # (in the formula, R represents a C1-C6 alkylene group,-S-or-SO2-, and n represents a real number)

The invention discloses a surface cleaning and spraying device for road and bridge construction, and belongs to the field of bridge construction.The surface cleaning and spraying device comprises a vehicle body and a raw material barrel arranged on the rear side of the upper surface of the vehicle body, a lead screw seat is arranged on the front side of the upper surface of the vehicle body, and a machine body is mounted on the upper surface of the vehicle body and located on the rear side of the lead screw seat; a lifting frame is arranged on the front surface of the lead screw seat, a rotating seat is rotationally connected to the lower surface of the lifting frame, a transmission motor is installed on the inner surface of the rotating seat, a brushing roller is arranged at the output end of the transmission motor, and adjusting units are arranged inside and outside the lead screw seat. According to the sweeping mode of the device, most of garbage and obstacles on the surfaces of large bridges and roads can be cleaned, spraying is convenient, the adjusting unit can enable the device to conduct side-changing spraying sweeping, the practical application range is widened, an anti-rotation block can limit rotation of a buckling rod under the condition that the side-changing function is not hindered, and the device is convenient to use. The stability and the firmness of the barrier removing plate in the advancing process are improved.