115results about How to "Broad application prospects" patented technology

The invention discloses bacillus dahliae and application thereof in degradation of nitrite, and belongs to the technical field of microorganisms. According to the thallus form, bacterial colony characteristics and physiological and biochemical characteristics of the JY-1 strain, a 16S rDNA sequence analysis result is combined; the JY-1 strain is identified as a rare species in bacillus, namely bacillus gaemokensis, which is preserved in China Center for Type Culture Collection on June 8th, 2020, and has a preservation number of CCTCC M 2020185. The strain has the capability of quickly degrading nitrite, 1.0 mg/L nitrite can be reduced to 0 within 3 hours, and the strain has a wide application prospect in the aspect of emergently solving the problem of high nitrite in an aquaculture pond.

The invention discloses a method for preparing anhydrous calcium sulfate whiskers by industrial byproduct phosphorus gypsum. The method mainly includes the steps: first, drying, crushing and screening the phosphorus gypsum to obtain phosphorus gypsum powder for standby application; second, adding quicklime and slaked lime powder and crystal regulators into the phosphorus gypsum powder obtained in the first step, regulating pH (potential of hydrogen) of a reaction system to 4-7 by hydrochloric acid and then performing crystallization reaction under normal pressure; third, performing solid-liquid separation on mixed slurry obtained in the second step to obtain solid products, and then washing and drying the solid products to obtain finished anhydrous calcium sulfate whiskers. The method for preparing the anhydrous calcium sulfate whiskers by the phosphorus gypsum is simple in process, low in cost and high in production efficiency. Besides, the highest length-diameter ratio of the anhydrous calcium sulfate whiskers prepared by the method can reach 400, gypsum blocks obtained by hydrating and hardening the whiskers are good in whiteness, the highest absolute dry compressive strength can reach 20MPa, and the gypsum blocks can be widely applied to the field of building materials for buildings, decoration and papermaking production and chemical industry production.

The invention discloses a novel Z-axis lifting platform. The novel Z-axis lifting platform comprises a hollow type rotary ultrasonic motor assembly, a lifting mechanism assembly and a displacement sensing assembly. The novel Z-axis lifting platform has the characteristics of high positioning precision, high response speed and electromagnetic interference resistance; meanwhile, based on a power-off self-locking characteristic of the ultrasonic motor, an extra locking apparatus is not required to maintain position; the problem of servo shaking of an electromagnetic motor is overcome; and the overall structure of the system is simpler and more compact, and miniaturization can be realized easily, so that the novel Z-axis lifting platform is wider in application prospect.

The invention discloses a switched reluctance motor transmission system of a plug-in hybrid electric vehicle. The switched reluctance motor transmission system comprises a switched reluctance electric generator, a switched reluctance motor, a front-end converter, a traction storage battery and an auxiliary storage battery; and the switched reluctance electric generator is connected with an internal combustion engine and driven by the internal combustion engine to generate electricity; and the switched reluctance electric generator comprises a three-phase stator winding and a power converter of the three-phase stator winding, and the switched reluctance motor comprises a three-phase stator winding and a power converter of the three-phase stator winding. By controlling turn-on and turn-off of five relays, switching of different working modes of the plug-in hybrid electric vehicle is achieved. According to the switched reluctance motor transmission system, the switched reluctance motor driving system without rare earth materials is designed, the switched reluctance motor transmission system is applied to an electric vehicle electric driving system, and by utilizing the motor windings and an existing power converter, the different driving modes and the flexible charging function are achieved without external-connection elements.

The invention relates to a 750kV converter transformer outgoing line cylinder structure and an assembly method. The 750kV converter transformer outgoing line cylinder structure comprises a first aluminum pipe insulator, a second aluminum pipe insulator and a cylindrical insulation plug-in structure, wherein the first aluminum pipe insulator is an S-shaped aluminum pipe welding structure with an outer surface provided with crepe paper insulation, one end of the first aluminum pipe insulator is connected with a coil, the other end of the first aluminum pipe insulator is fixedly connected with the cylindrical insulating plug-in structure, the second aluminum pipe insulator is a cylindrical aluminum pipe welding structure with an outer surface provided with a crepe paper insulator, one end ofthe second aluminum pipe insulator is fixedly connected with a voltage-sharing ball, the shape and the size of the outer diameter of the other end of the second aluminum pipe insulator are matched with the shape and the size of the inner diameter of the cylindrical insulating plug-in structure, and the second aluminum pipe insulator is inserted into the cylindrical insulating plug-in structure tobe tightly attached to and in contact connection with the cylindrical insulating plug-in structure. According to the invention, good electrical performance and mechanical performance of the outgoing line structure are ensured, and safe operation of the outgoing line structure is ensured; and the outgoing line cylinder is reliable in structure and convenient to install, the end structure is convenient to disassemble and transport, and it is guaranteed that the size of the outgoing line structure can meet the transportation requirement.

A vehicle-mounted fault detection and early warning system disclosed by the present invention mainly comprises a vehicle-mounted MCU, an on-board diagnostics (OBD) system interface, an ABS signal acquisition module, an automatic transmission connection module, a car light data acquisition module, a voice communication module and a 4S store detection, maintenance and service platform. The vehicle-mounted fault detection and early warning system of the present invention can accurately detect the vehicle faults and the concrete faulted parts and positions, alarms the faults, does not need to the professional instruments, does not require the technology levels for overhauling personnel, is convenient to carry, and can timely troubleshoot the faults which are not observed by the operators easily, but possibly cause the serious consequences.

The invention discloses a binary output landslide monitoring sensor. The binary output landslide monitoring sensor is composed of sensing rods, a pull rope and a displacement tension sensor. The displacement tension sensor is composed of a displacement tension sensing device and a displacement measuring device. A displacement tension connecting rod, a guide wheel and a sliding brush are arranged in the displacement tension sensing device. The displacement tension sensing device is mounted in the displacement measuring device. The displacement measuring device is provided with an insulated outer surface, short-circuit electrode plates and a stress spring. The short-circuit electrode plates are provided with electrodes, wherein the minimum size of the electrodes is delta, the measured binary output range of the electrodes is 2N, the electrodes with the same weight are connected through a short-circuit connecting line, the short-circuit electrodes corresponding to the short-circuit connecting line with the output weight smaller than N/2 are distributed on the low-order short-circuit electrode plate, and the short-circuit electrodes corresponding to the short-circuit connecting line with the output weight larger than or equal to N/2 are distributed on the high-order short-circuit electrode plate. A rain starting switch device and a regular transience starting switch device are arranged to save electricity. According to the binary output landslide monitoring sensor, binary output is adopted, output data are more accurate, and an accurate quantization basis is provided for geologic structure change.

The invention discloses a preparation method of a boron-doped porous carbon nitride material, and belongs to the technical field of synthesis of photocatalytic materials. The preparation method comprises the following steps: heating melamine to obtain graphite phase carbon nitride, mixing and grinding the graphite phase carbon nitride, sodium chloride, potassium chloride and ammonia borane, and heating and reacting the obtained mixture in an air atmosphere to prepare the boron-doped porous carbon nitride material due to the pore forming effect of molten salts and air and the pyrolysis of the ammonia borane. The preparation method of the boron-doped porous carbon nitride material has the advantages of simple process, and easiness in enlarged production, and the material has the advantages of large specific surface area, good surface-specific adsorption and good photocatalytic performance.

The invention discloses a photoetching method for preparing a hydrophilic-hydrophobic pattern. The photoetching method comprises the following steps of firstly, coating or spraying a pattern connection layer with a pattern on a substrate; secondly, coating, spraying or spinning a surface coating layer; and finally, performing irradiation by ultraviolet light or sunlight or visible light or infrared light to obtain the hydrophilic-hydrophobic pattern, wherein the material of the substrate is selected from arbitrary one of glass, metal, alloy, stainless steel, a wall body, paper and cotton fabric, the pattern connection layer is organic silicon gel or siloxane with the pattern, the surface coating layer is micronano TiO2 particles with sizes being 10 nanometers to 10 micrometers or micronano TiO2 particles of which surfaces are modified with a low-surface energy substance. A photomask is not needed, the preparation method is simple, the application range of a photoetching technology is expanded, energy sources are saved, the pattern with an arbitrary pattern can be prepared, self supply of the low-surface energy substance is achieved, so that the service lifetime of the low-surface energy substance is prolonged, and the photoetching has a wide application prospect.

The invention discloses a preparation method for a sulfur-doped carbon oxygen reduction electrocatalyst. The preparation method comprises the steps of (1) detaching waste lithium thionyl chloride batteries, and collecting a sulfur/carbon black mixture from discharged batteries; (2) performing heat treatment in an inert gas at a temperature of 500-1,100 DEG C for 10-150min, and cooling; and (3) adding an acid solution and stirring for 2-10h, then filtering, cleaning filtering residue by clean water until effluent liquid is neutral, drying the filtering residue until water content is less than 5wt%, and collecting the dried filtering residue. The sulfur-doped carbon oxygen reduction electrocatalyst obtained by the preparation method is good in catalysis effect; the preparation method is simple, and batch production can be realized easily; by recycling waste, the production cost is greatly lowered while the problems of difficulty in recycling the waste lithium thionyl chloride batteries and caused environment pollution are effectively solved; the preparation method is simple and easy to implement, economical and environmentally friendly, capable of realizing large-scale production easily, wide in application prospect, and high in economic benefit and social environment protection value.

The invention, which relates to the field of frequency conversion speed regulation, discloses a method for detecting the output phase loss of a frequency converter. The method comprises the followingsteps that: a three-phase instantaneous current output value of a frequency converter is sampled and a three-phase instantaneous current integrated vector effective value is calculated; a step A is performed; to be specific, an absolute value of an instantaneous current output value of each phase is compared with a first phase loss threshold respectively; if the absolute value of the current instantaneous current output value is less than the first phase loss threshold, the phase variable of the phase is unchanged and a first time length is accumulated; when the first time length is larger than a first time length threshold and an absolute value of the difference between the phase variable and a motor electrical angle is greater than 90 degrees, the output phase loss of the current phase is determined; and if the absolute value of the current instantaneous current output value is greater than or equal to the first phase loss threshold, the current phase variable is synchronized to be acurrent motor electrical angle and the first time length is reset; and a step B is performed; to be specific, the three-phase instantaneous current integrated vector effective value is compared witha second phase loss threshold; if the three-phase instantaneous current integrated vector effective value is less than the second phase loss threshold, a second time length is accumulated; when the second time length is larger than or equal to a second time length threshold, the three-phase output phase loss is determined; and if the three-phase instantaneous current integrated vector effective value is larger than or equal to the second phase loss threshold, the second time length is reset.

The invention relates to a preparation method of an isotropic Bi-system high temperature superconducting thin wire. After a conventional powder sleeve method, namely a PIT, is used to prepare a multi-core circular wire and before a Bi-system wire is treated by annealing, the wire requires at least one initial mechanical deformation process; and after a preheating treatment, a thin wire undergoes at least one intermediate mechanical deformation process. A thin circular wire which does not undergoes the preheating treatment has a diameter of 0.1mm to 2.5mm, and an edge length of a thin square wire section is 0.1mm to 2.5mm. The Bi-system high temperature superconducting thin wire which is made by the preparation method is provided with a circular or square section, and the wire has the multi core structure; each single-core wire after the final heat treatment is provided with a polygonal acute angle star structure; the single-core acute angle star structure is considered to play an important role in improving the critical current of the multi-core high temperature superconducting thin circular wire.

The invention relates to a hydrophobic photon crystal-structure color-producing material and a preparation method thereof, belonging to the field of new material preparation. The hydrophobic photon crystal-structure color-producing material is composed of a matrix, a photon crystal layer positioned on the matrix and a cationic surfactant layer attached to the surface of the photon crystal layer, wherein the photon crystal layer is formed by filling an adhesive in the gaps of microspheres which are arranged periodically and closely; and the microspheres are selected from polystyrene, polymethyl methacrylate, silicon dioxide, titanium dioxide or zirconium dioxide microspheres. The hydrophobic photon crystal-structure color-producing material has the advantages of high hydrophobicity and high strength, is suitable for coloring glass, silicon chips, steel straps, copper sheets, aluminum sheets, cotton fabrics, silk, plastic films or paper, and has wide application prospects.

The invention discloses a rectifying structure for a ballastless track roadbed of a soft soil area operation high-speed railway. The rectifying structure comprises a pile base reinforcing area, a foundation reinforcing cushion layer, a high-speed railway dam, a first soft stratum area, an asymmetrical load area and a second soft stratum area, wherein the pile base reinforcing area moves transversely towards the second soft stratum area; a first row of rotary-spraying piles are arranged in the second soft stratum area along a longitudinal direction; a deformed groove is formed in the asymmetrical load area; the length direction of the deformed groove is accordant with the longitudinal direction of the asymmetrical loading area; hard foam is filled into the deformed groove; a plurality of stress releasing holes are formed in the asymmetrical load area between one side of the deformed groove and one side of the pile base reinforcing area; the bottom of each stress releasing hole extends downwards, and passes through the first soft stratum area; medium-coarse sand or macadam is filled into each stress releasing hole. Acting force is applied to the deep part of a foundation, and the foundation is used for driving a roadbed body to move, so that the aim of rectifying transverse displacement of the roadbed is fulfilled.

The invention provides a biological sample-wrapped silk fibroin microsphere preparation method, and relates to the technical field of preparation of protein microspheres. The preparation method comprises the following steps: preparing a regenerated silk fibroin solution; mixing the regenerated silk fibroin solution, a surfactant and the biological sample to obtain a mixed solution; and performingshear microdroplet treatment on the mixed solution to disperse the mixed solution in an oil-phase solution, and performing stewing, curing, centrifugation, washing and filtering to obtain a biologicalsample-wrapped silk fibroin microsphere. The prepared biological sample-wrapped silk fibroin microsphere has no cytotoxicity and is easy to degrade; and encapsulation, wrapping and active storage ofthe biological sample are realized. Furthermore, the preparation method is simple, efficient, easy to operate and high in repetitiveness.

The invention relates to a self-powered sensor. The self-powered sensor comprises a composite material molding body, a conductive metal film arranged on a surface of the composite material molding body, a conductor wire electrically connected with a conductive metal film, and a packaging body for packaging the conductive metal film. The packaging body and the conductive metal film are arranged onthe same surface of the composite material molding body, and the composite material molding body is a product obtained by performing vulcanization molding on the composite material containing the shearing hardening elastomer, the magnetic micro-nano particles and vulcanizing agent. The invention further relates to a preparation method of the self-powered sensor.

The invention discloses a photocatalyst for removing NO. A preparation method of the photocatalyst comprises the following steps: (1) mixing and ball-milling gamma-Al2O3 powder, deionized water and polyethylene glycol; (2) adding propyl gallate, and stirring to obtain stirred slurry; (3) carrying out injection molding and calcining to obtain a base material; (4) soaking in a manganese sulfate solution and drying; (5) soaking in a potassium permanganate solution, performing hydrothermal treatment and drying; and (6) doping iridium to obtain the photocatalyst for removing NO. The photocatalyst prepared by the method provided by the invention has high photocatalytic activity on NO, and compared with the traditional catalyst, the degradation rate of NO is obviously enhanced.

The invention relates to a plane mechanism structure teaching analyzer and belongs to the technical field of teaching instruments. The analyzer aims at solving the problems that experiment modes in the mechanical subject experiment teaching are single and outdated, be understood through physical model static displaying, and teaching aid assisted matched structures are complicated, large in size and cannot perform in-class explanation through dynamic displaying and the like. The analyzer comprises five portions: a virtual restraint mechanism unit, a one-freedom mechanism unit, a two-freedom mechanism unit and a low-pair replacing high-pair unit of a plane mechanism and a power shunting unit. The five units are fixed on a bottom plate. By means of the analyzer, sports demonstration and exercise exploration are integrated, the analyzer can be brought into classes to performing teaching of plane mechanism composition, plane mechanism moving condition, mechanism freedom degree calculation methods, mechanism kinematic sketch drawing, mechanism structure analysis and the like.

The invention discloses a hot-air drying machine capable of utilizing waste heat and achieving penetrating countercurrent fluidization. The upper portion of a drying tower is connected with an induced draft fan, and the induced draft fan is connected with a cyclone dust removing waste heat efficient recoverer formed by a tube-type heat exchanger and a cyclone dust collector in an overlapped manner in the tangent direction and then is emptied; the air inlet end of the shell side of the tube-type heat exchanger is communicated with the atmosphere, and the air outlet end of the shell side of the tube-type heat exchanger is connected with the lower portion of the drying tower through an air blower and a steam finned heater; and an impeller of the induced draft fan is of a structure that blades are in a hollow and wedged shape, and the contour line of the appearance of the induced draft fan is an involute. According to the hot-air drying machine capable of utilizing the waste heat and achieving the penetrating countercurrent fluidization, creative integration is conducted on waste heat utilization and dust removal, the cyclone dust removing waste heat efficient recoverer is designed out, the equipment input is reduced, and the work efficiency is improved; and due to the fact that sieve mesh cone covers, sieve mesh cone discs, discharging tubes, a stretching vibration transmission shaft and conical plugs are arranged, penetrating, countercurrent, boiling and fluidization drying of materials are exquisitely and perfectly achieved, more energy is saved, the drying quality is higher, the power consumption of the induced draft fan is lower, and the application prospect is wider.

The present invention provides a current measurement device and method, and a manufacture method of a current measurement device. The device comprises: an elastic clamp, wherein the elastic clamp includes an elastic clamp body with a prefabricated circular binding clip and a clamp-type closed circular ring being inlaid on the circular binding clip of the elastic clamp body and being composed of a plurality of Hall elements; a signal processing additive circuit configured to obtain the Hall voltage of each Hall element when the elastic clamp is clamped the wires flowing through the current to be measured, obtain the current value to be measured based on the Ampere circuital theorem according to the Hall voltage of the Hall element and output the current to be measured to a display interface circuit; and the display interface circuit configured to obtain the current value to be measured outputted by the signal processing additive circuit and output the current value to be measured to the display device. The current measurement device is able to perform safe, simple, low-cost and efficient measurement of sorts of currents everywhere, and has wide application prospects.

The invention relates to a solar-charged carport comprising a supporting shed. A solar panel assembly is arranged at the top of the supporting shed and is connected with a storage battery; the storage battery is connected with an inverter; the inverter is connected with a distribution box; the distribution box is connected with a charger; the solar panel assembly, the storage battery, the inverter, and the distribution box are connected to a controller. The two mutually symmetrical ends of the solar panel assembly are respectively provided with a guide rail, and the guide rails are higher than the plane in which the solar panel battery is located; a sliding strip is arranged between the two guide rails, the two ends of the sliding strip are slidably arranged on the guide rails through two sliding blocks, and a wiping block is arranged at the bottom of the sliding strip. The sliding strip is fixedly connected with one end of a sliding rod, a nut is connected with the other end of the sliding rod and is matched with a lead screw, and the lead screw is matched with a drive motor. According to the solar-charged carport, the wiping block on the sliding strip is used for wiping away dust and stains on the surface of the solar panel assembly so that the absorption efficiency of the solar panel assembly on sunlight is ensured.

The invention discloses a method for improving hole sealing performance in gas extraction. The method includes the steps of 1), using hole sealing materials to seal hole sealing sections of a drill hole and cracks generated from vibration of the drill hole; 2), using reinforcing materials to reinforce coal-rock mass loosened belts nearby the hole sealing sections of the drill hole and seal the cracks; 3), using spraying materials to perform surface spraying upon coal walls nearby openings of the hole sealing sections of the drill hole. By the method in combination of processes of hole sealing, reinforcing and spraying, the cracks causing air leakage can be effectively sealed, the hole sealing performance in the gas extraction can be remarkably improved, and the problem about fast concentration attenuation in the gas extraction is fundamentally solved, so that the concentration of the gas extraction is much higher than that of an extraction process adopted in an existing coal mine, utilization rate of gas energy is increased, coal mine safety is improved, and broad application prospects are achieved.

The invention relates to a high-temperature-resistant mica plate matrix resin and preparation method thereof. The matrix resin comprises TGBAPOPP epoxy resin, a curing agent, 2-sulfhydryl benzimidazole, N-(toluenesulfonyl)-N'-phenyl para-phenylene diamine, 2-sulfhydryl benzimidazole zinc salt and an organic solvent. The preparation method comprises the following steps: putting the TGBAPOPP epoxy resin, the 2-sulfhydryl benzimidazole zinc salt and the organic solvent into a reaction kettle for mixing and evenly stirring at the temperature of 50 to 70 DEG C, thereby obtaining a component A; mixing the curing agent, the 2-sulfhydryl benzimidazole, the N-(toluenesulfonyl)-N'-phenyl para-phenylene diamine and the organic solvent and evenly stirring at the temperature of 50 to 70 DEG C, thereby obtaining a component B; and during the application, evenly mixing the component A with the component B at the temperature of 50 to 70 DEG C, thereby obtaining the matrix resin. The matrix resin provided by the invention is convenient in raw material obtainment, simple in preparation process, low in cost and excellent in comprehensive performance.

The invention provides a counter electrode for dye-sensitized solar cell, composed of a substrate, a metal layer, a barrier layer and a catalyst layer. A preparation method of the counter electrode is as follows: orderly depositing the metal layer, barrier layer and catalyst layer on the substrate; when an electrolyte adopted by the dye-sensitized solar cell has no corrosion to the metal layer, there is no barrier layer between the metal layer and catalyst layer, namely, the catalyst layer is directly coated on the surface of the metal layer. The invention has advantages as follows: capable of reflecting the sunshine that is not completely absorbed by the dye, increasing light path, improving utilization rate of sunshine and absorption rate of dye; capable of obviously lowering resistance of serially connected cells and internal consumption of cells, improving ohmic contact, enhancing filling factor and output power of the cells; the widely selectable materials of substrate; the simple and low-cost preparation method; simple preparation of metal layer, wide range of deposition temperature that is easy to deposit in large scale and high speed rate; capable of obviously increasing photoelectric conversion rate of the dye-sensitized solar cell, with wide application foreground.

The invention relates to a method for preparing a bent copper nanowire by using a polyhydric alcohol secondary adding method. The method comprises the following steps of 1) dissolving copper salt in polyhydric alcohol A, and performing ultrasonic treatment to form a uniform solution B; 2) dissolving amine organic alkali and ammonium halide in the polyol A, and performing ultrasonic treatment and heating to form a solution C; 3) injecting the solution B into the solution C under stirring to form a solution D; 4) heating the solution D and continuously stirring to form a solution E; and 5) performing heat preservation on the solution E for a certain time, then adding polyhydric alcohol F into the solution E, conducting continuous stirring, and finally performing natural cooling to obtain the bent copper nanowire. The bending-shaped copper nanowire is obtained by regulating and controlling the components of the polyhydric alcohol, the proportion of the polyhydric alcohol added twice and the adding time, and the method has the advantages of simple raw materials, mild reaction conditions, simple preparation method and the like. In addition, the bent copper nanowire prepared by using the method is large in length-diameter ratio, high in yield and large in bending degree, and is expected to be well applied to the field of transparent electrode materials.

The invention provides an intelligent fire-fighting robot, comprising a control module, a mobile chassis module, a fire-source detecting module and a fire fighting module, and further comprising an obstruction detecting module connected with the control module, wherein the obstruction detecting module is used for detecting obstacles around the fire-fighting robot. Based on the robot in the prior art, the functional modules for height limitation detection, selective start-up of fire-fighting devices, radio reception of fire information, and the like, are additionally arranged, and therefore, the robot provided by the invention can avoid the obstacles better and can quickly arrive at a fire source under the prompt of signals sent by a fire detector in a building so as to quickly start up the corresponding fire fighting devices to put out the fire source. The intelligent fire-fighting robot is capable of achieving the purpose of protecting the human life and property, thereby having a wide application prospect in the field of automatic building fire fighting in future.

The invention discloses a device for separating excrement from urine by utilizing a sensing technology. The device comprises a sensor identifying device, an electric door sealing device and a PLC (programmable logic controller), wherein the sensor identifying device is arranged on the upper part of the electric door sealing device and is fixedly connected with the electric door sealing device; the main body of the sensor identifying device is in the shape of a frame; a plurality of infrared radiation photoelectric sensors are transversely and/or longitudinally arranged at the outer side of the frame; an invisible light sensor light screen net can be formed in the frame; the electric door sealing device comprises a lead screw motor, a sealing door and an excrement dropping channel; a urine guide opening is formed in the lower part of the excrement dropping channel; the door sealing device is arranged on the lower part of the urine guide hole for opening and closing the excrement dropping channel; a lead screw in the lead screw motor is connected with the sealing door in a rotary mode; the PLC controls the motor motion by virtue of a signal of the sensor identifying device. The device can be used for effectively separating the excrement from the urine, so that people can normally go to the water closet without collecting the urine and the excrement in different bags, and therefore, the water closet with the device has no difference from a normal water closet.

The invention discloses a flexible connecting structure of a prefabricated component and a building main body.The flexible connecting structure comprises a plurality of layers of cast-in-place building main bodies vertically arranged at intervals, a prefabricated component is connected between two adjacent cast-in-place building main bodies, a tenon is arranged at the lower end of the prefabricated component, a mortice matched with the tenon is formed in the top surface of the cast-in-place building main body, and the prefabricated component is in bell-and-spigot joint to a lower layer cast-in-place building main body through mortise and tenon joint; a first flexible layer used for reducing the rigidity of the connection between the prefabricated component and a upper layer cast-in-place building main body is arranged at the joint of the prefabricated component and the upper layer cast-in-place building main body. according to the flexible connecting structure of the prefabricated component and the building main body, the flexible connection between the prefabricated component and the building main body is realized, and the influence of the prefabricated component on the rigidity of the building main body is avoided.

The invention provides a method for controlling a large-size FeGa magnetostrictive single crystal to grow on a solid-liquid interface. The method comprises the following steps: 1) carrying out proportioning according to target components; 2) smelting a mother alloy by using a vacuum non-consumable electric arc smelting furnace; 3) melting a mother alloy ingot by utilizing a magnetic suspension induction smelting furnace, and carrying out casting to form mother alloy bars; and 4) placing the mother alloy bars and FeGa single-crystal seed crystals in a double-layer crucible, placing the double-layer crucible into directional solidification equipment, carrying out heating to completely melt the mother alloy bars and melt the upper part of the FeGa single-crystal seed crystals, and pulling thelower part of the melted material into a cooling liquid along the lower part of the FeGa single-crystal seed crystals to carry out directional solidification, so that the large-size FeGa magnetostrictive material is prepared. The method is simple in process equipment and is convenient to operate, a prepared FeGa single crystal saturated magnetic field is only 500 Oe, the magnetostrictive coefficient is up to 300-320 ppm, comprehensive usability is good, and the application prospect is wide.

The invention discloses a method and a device for molding a small-angle bent pipe fitting by taking different curved surfaces as extrusion surfaces, and relates to a preparation technology for medium and thin-wall bent pipe fittings. A metal blank is subjected to extrusion molding through the molding device taking different curved surfaces as the extrusion surfaces; and the device comprises a mould molding part, a mould fixing part and a guide part. The invention has the advantages that: a female die and a male die of the mould molding part and a central line of a spindle are in the same straight line in the extrusion molding device of the bent pipe fitting; and the mould is convenient to assemble and easy to adjust. The bent pipe fitting is prepared by changing the shape and the concave-convex degree of a curved surface at the discharge end of the female die; the device has a rational structure and a simple process; and the bent pipe fitting has uniform wall thickness, does not crinkle, and has a cross section free from distortion, reliable quality and a broad application prospect.