41results about How to "To achieve the purpose of design" patented technology

The invention discloses a cellulose-based magnetic aerogel material and a preparation method thereof. The method comprises the following steps: carrying out chemical modification, thereby obtaining high-activity amphoteric cellulose; firmly combining the amphoteric cellulose and a graphene oxide through electrostatic interaction and hydrogen bonding forces and the like to build a framework of the aerogel material. Disperse loading of a magnetic nano ferroferric oxide can be achieved by virtue of the advantages of high surface activity and super-large specific surface area; the structure uniformity and the stability of the magnetic aerogel of the amphoteric cellulose are ensured through the steps of cross-linking, freeze-drying and the like; the characteristics of high specific surface properties, good affinity, biodegradability and the like of the cellulose are kept by the magnetic aerogel; and the magnetic aerogel obtains high surface activity and superparamagnetic property, has the advantages of low cost, high strength, amphoteric characteristic, biocompatibility and the like, has the characteristics of high specific surface area, high loading capacity, high surface activity, intelligent positioning and the like, and has significant adsorption capacity on pollutants such as heavy metal ions and organic molecules.

The invention relates to a user description based programming design method on an embedded heterogeneous multi-core processor. The method includes the steps that a user configures a guide through an image interface to perform description of a heterogeneous multi-core processor platform and a task, a parallel mode is set, an element task is established and registered, a task relation graph (directed acyclic graph (DAG)) is generated, the element task is subjected to a static assignment on the heterogeneous multi-core processor, and processor platform characteristics, parallel demands and task assignment are expressed in a configuration file mode (extensible markup language (XML)). Then the element task after a configuration file is subjected to a parallel analysis is embedded into a position of a heterogeneous multi-core framework code task label, a corresponding serial source program is constructed, a serial compiler is invoked, and finally an executable code on the heterogeneous multi-core processor can be generated. By means of the user description based programming design method on the embedded heterogeneous multi-core processor, parallel programming practices such as developing a parallel compiler on a general personal computer (PC) or a high-performance computing platform, establishing a parallel programming language and porting a parallel library are effectively avoided, the difficulty of developing a parallel program on the heterogeneous multi-core processor platform in the embedded field is greatly reduced, the purpose of parallel programming based on the user description and parallelization interactive guide is achieved.

The invention provides an ordered cooking machine which is richer in function, more convenient to use and compact in structure and can order cooking rice and food simultaneously. The cooking machine comprises a shell, a set of electric heating rice cooker, one or more sets of electric heating food cookers comprising an electric heater and a food cooking container, a set of electric refrigerator, thermal insulating layers and a control device, wherein the electric heating rice cooker and the electric heating food cookers are arranged inside the shell; the thermal insulating layers are arranged between an inner cavity of the electric heating rice cooker and the shell and an inner cavity of the electric heating food cooker and the shell; a heat absorption end of the electric refrigerator is thermally connected with the inner cavity of the electric heating rice cooker and the inner cavity of the electric heating food cooker; and an output end of the control device is electrically connected with the electric refrigerator, the electric heater of the electric heating rice cooker and the electric heater of the electric heating food cooker. By the cooking machine, more food and dishes can be ordered simultaneously, so that ordered food cooking is not just for rice cooking, and the cooking machine is more convenient to use.

The invention provides a mobile RFID (radio frequency identification) reader-writer terminal and an ad-hoc network thereof based on WIFI (wireless fidelity). The terminal comprises a wireless communication module and a radio frequency identification module, wherein the wireless communication module is used for maintaining a routing table containing path information and access points reaching eachof other mobile RFID reader-writers, receiving messages and data from the radio frequency identification module, transmitting the messages and the data and updating the routing table, and the radio frequency identification module is used for reading and writing an electronic tag in a wireless communication range, and correspondingly receiving and processing the data through the wireless communication module after the electronic tag is activated when entering an operating area of the radio frequency identification module.

The invention relates to a fresh air exchange technology and an air pipe type air-conditioner technology, in particular to an integrated fresh air air-conditioner dehumidifying integrated machine fora passive house. The integrated fresh air air-conditioner dehumidifying integrated machine comprises a compressor, a first four-way valve, a second four-way valve, an outdoor heat exchanger, an indoorheat exchanger, a dehumidifying re-heater, an outdoor circulating draught fan, an indoor circulating draught fan, a liquid storing device, a throttling element, a full-air exchange core block, a fresh air draught fan and a control module. The integrated machine is provided with an outdoor circulating air opening, an air exhaust opening, a fresh air opening, an indoor circulating air opening, an air supplying opening and a turbid air opening, and the full-air exchange core block is mounted between an air supplying air channel and an air exhaust air channel. According to the integrated fresh air air-conditioner dehumidifying integrated machine for the passive house, the structure is simple, the design is reasonable, intelligent and efficient operation can be achieved only by setting relevant parameters, energy saving and consumption reduction can be achieved in fresh air exchange, the requirements for the indoor temperature and humidity can be met, the design purpose of the passive house is achieved, an outdoor unit does not need to be mounted outside the passive house in engineering mounting, mounting is convenient and rapid, and maintaining is convenient.

The invention relates to a bidirectional-loading double-turning water-lubrication thrust bearing testing apparatus with a pretightening force. The testing apparatus comprises a motor, a loading part, and a testing part. The loading system employs two sets of independent hydraulic loops and is provided with two sets of loaded piston cylinders and two sets of loaded thrust bearings; loading is carried out on two directions simultaneously and the loads are adjusted respectively and can change according to different designated rules, thereby simulating the complicated operation condition of the real machine. The testing part mainly includes a testing bearing water tank, two sets of testing thrust bearing support systems, two sets of testing thrust bearing bushes, two sets of thrust plates, and one set of flywheels; and springs are installed in the testing thrust bearing support systems and pretightening is carried out on the testing thrust bearing bushes. Therefore, effective performance testing is carried out on the two sets of testing bearings. The loading part and the testing part of the apparatus are independent to each other; the installation and maintenance become simple; and performance testing can be carried out on a thrust bearing with any lubrication medium in any support mode. The provided apparatus can be applied to various fields like the thrust bearing of the nuclear main pump motor and the like.

The invention discloses a condition determining method satisfying a multistage full free flight wind tunnel test similarity law. A dropping type wind tunnel free flight test similarity law is deducedaccording to dynamics and kinematics. Aiming at lifting body appearance and aiming at a totally-free free flight test of a two-stage, even multi-stage model, the test similarity law is designed for the first time, and a lifting body appearance similarity problem is solved emphatically. When the wind tunnel model satisfies a limiting condition, horizontal line displacement and angular displacementcurves obtained by the wind tunnel test can be guaranteed to be similar as the curves of a real aircraft, and the wind tunnel test is guaranteed to be capable of simulating separation conditions of the real aircraft. A difficult problem of absence of similarity law guidance to the two-stage, even multi-stage full free flight test is solved. For the aspect of the absence of the totally-free wind tunnel free flight test similarity law for two, even more aircrafts, conditions satisfying the multi-stage full free flight wind tunnel test similarity law are obtained in the method provided by the invention.

The invention provides an advance cooking machine which has richer functions and a compact structure, is more convenient to use and can carry out advance rice cooking and vegetable cooking simultaneously. The machine comprises a shell, heat insulation layers, a control device, a set of electric heating rice cooker, a set of electric heating vegetable cooker and a set of electric refrigerator, wherein the electric heating vegetable cooker comprises electric heaters, a pot body, a pot body cavity, an agitator and a low-speed motor; the pot body is movably arranged in the pot body cavity and is connected with the electric heaters; the agitator is arranged at the bottom in the pot body and is connected with an output shaft of the low-speed motor; the electric heating rice cooker and the electric heating vegetable cooker are arranged inside the shell; the heat insulation layers are arranged between a rice cooking container cavity of the electric heating rice cooker and the shell as well as between the pot body cavity of the electric heating vegetable cooker and the shell; a heat absorption end of the electric refrigerator is thermally connected with the rice cooking container cavity of the electric heating rice cooker and the pot body cavity of the electric heating vegetable cooker; and the output end of the control device is electrically connected with the electric refrigerator, electric heaters of the electric heating rice cooker and the electric heaters as well as the low-speed motor of the electric heating vegetable cooker respectively.

The invention provides a turtle feed in fish-turtle polyculture mode and a preparation method of the feed. The feed comprises white fish meal, red fish meal, alpha-starch, extruded soybean, vinegar residue powder, beer yeast, mineral additives, multi-vitamins, feed binder, calcium hydrogen phosphate, sodium dihydrogen phosphate, carnitine, betaine, bile acid, methionine, lysine, nucleotide, choline chloride, and salt. The preparation method comprises the following steps: fully mixing the ingredients with stirring to prepare a feed, then feeding, precleaning, mixing, deironing, crushing, conducting superfine grinding, and mixing. The feed disclosed herein has scientific and reasonable combination, enhances the immunity and contagious virus resistance of the turtle, guarantees the normal growth of the turtle, simultaneously reduces the discharge of nitrogen, phosphor and other pollutants, reduces the pollution to the culture water body, reduces drug dosage, achieves the requirements of ecological breeding, and obviously reduces the cost. The preparation method is scientific and reasonable. The invention has significant economic benefits and social benefits.

The invention belongs to the technical field of aircrafts and discloses a four-rotor aircraft based on an AVR single chip microcomputer. The four-rotor aircraft based on the AVR single chip microcomputer comprises a main control module, a remote-control communication module, an inertia measurement module, a power supply module and a driving module. The four-rotor aircraft has the advantages of being simple in mechanical structure, low in cost, low in accident rate, light in weight and the like, the four-rotor aircraft with the functions of self-stabilizing, hovering, returning and the like ofthe aircraft can be realized, meanwhile, the four-rotor aircraft is controlled through cooperation with a double-closed-loop cascade PID control algorithm, and finally online debugging is carried outthrough an upper computer software, an outdoor on-site flight test proves that the four-rotor wings can stably take off well, actions such as self-stabilization and hovering can be completed, such that the purpose of the design is achieved.

The invention relates to a double direction thrust bearing tester. A rolling bearing seat is arranged in an oil groove; the device is provided with two sets of thrust bearing devices between which a loading piston cylinder is arranged, and both ends of the loading piston cylinder are respectively connected with fixing plates at both sides of the thrust bearing; the two sets of rolling bearings are respectively arranged in the rolling bearing seat; two thrust discs are respectively arranged on an output shaft of a motor; the trust bearing is arranged between a fixing ring and the fixing plate; two sliding rods are respectively fixed on the rolling bearing seats passing through the respective fixing ring and the fixing plate, a sealing which is arranged on the output shaft of the motor is fixed at the side wall of the oil groove, and the output shaft of the motor is connected with the motor through a coupler. The double direction thrust bearing tester of the invention has simple installation and overhaul, and can effectively test and verify the performance of a double direction thrust bearing.

The invention relates to an accelerated spot-welding package machine and in particular relates to a welding head acceleration device for improving the spot-welding quality and increasing the spot-welding speed. The welding head acceleration device comprises a draw bar fixing block, a draw bar, a welding head mechanism, a cylinder and a cam, wherein the cylinder is arranged at a welding head, the cylinder is fixed on the draw bar fixing block, and the welding head mechanism and the cylinder are connected with each other. The cylinder pushes the welding head to move rapidly, and the cylinder is matched with the draw bar and works together with the cam, so as to achieve the acceleration purpose. The pressure and stroke of the cylinder are stable during motion, the spot-welding quality is improved, the problem of slow speed of the welding head is solved, the equipment production efficiency is increased, and the designed purpose is achieved.

The invention discloses an adjustable cable clamp positioning device, which comprises a cable clamp adjusting and abdicating unit, a positioning and locking unit and a cable fixing unit, wherein two side ends of the positioning and locking unit are clamped into the cable clamp adjusting and abdicating unit and are in flip-type fixed connection; the cable fixing unit is clamped into the cable clampadjusting and abdicating unit; the cable clamp adjusting and abdicating unit comprises a fixed base, positioning clips and support clamping blocks; the positioning and locking unit comprises a positioning seat, a limiting clamping plate, a fixing clamping plate and a fixing clamping part; and the cable fixing unit comprises a band, a fixing bayonet and a limiting reducing interface. The adjustable cable clamp positioning device is simple and reasonable in structural design and is capable of adjusting the caliber of the band, so that the band expands and contracts or extends to achieve clamping and fixing of a plurality of cables of various specifications; and the positioning and locking unit is capable of adjusting the caliber of the band and then playing roles in fixing and clamping thecable clamp adjusting and abdicating unit and the cable fixing unit, and is capable of effectively preventing the cable fixing unit from playing and falling off at an inner end of the cable clamp adjusting and abdicating unit.

The invention provides a delayed cooking boiler used for delayed rice cooking and dishes stewing, which has more functions, is more convenient to use and has a compact structure. According to a technical solution for realizing the purposes, the delayed cooking boiler comprises a housing, a set of electric rice cooker, a set of electric food steamer which comprises an electric-heating steam generating device and a steam chamber, an electric refrigerator, a thermal insulation layer and a controlling device. The electric rice cooker and the electric food steamer are arranged inside the housing; the thermal insulation layer is disposed among the pot body chamber of the electric rice cooker, the steam chamber of the electric food steamer and the housing; the heat absorption end of the electric refrigerator is connected with the pot body chamber of the electric rice cooker and the steam chamber of the electric food steamer; and the output end of the controlling device is electrically connected with the electric refrigerator, the electric heater of the electric rice cooker and the electric-heating steam generating device of the electric food steamer respectively.

The invention discloses an automobile seat safety belt additional safety cushion plate used for automobile taking safety of a pregnant woman or a child and a use method of the automobile seat safety belt additional safety cushion plate. The cushion plate comprises a force bearing board part, a left resistance arm part, a right resistance arm part and a clamping tongue part, all of which are arranged to be rigidly-connected rigid board bodies. The danger that an original automobile seat safety belt fastens the position of a fetus of the crotch of the pregnant woman, and an abortion or a stillbirth is likely to happen when an accident happens can be avoided, and the cushion plate assists the automobile seat safety belt in effectively protecting the safety of the pregnant woman and the fetusof the pregnant woman. The cushion plate can be used by the child and can achieve the purpose that a woven belt of the safety belt can fasten the two thighs instead of the weak belly, and the belly ofthe child is prevented from being harmed in a collision accident. Other people still can sit on an automobile seat where the pregnant woman or the child once sits without impediment, the cushion plate can be stored in a handbag and can be used at any time when a user takes other automobiles, and the safety of the pregnant woman or the child as the user is protected at any time.

The invention discloses a bedroom cold water pump comprising a motor part assembly, a volute assembly, a circulating cooling filter assembly and a cutting assembly. One part of water of a sewage outlet of a water outlet base of the volute assembly is introduced into a cooling sealing cavity in the motor part assembly through the circulating cooling filter assembly, sewage is used for circularly cooling a motor in a motor sealing cavity, energy utilization of resources is achieved, and the motor can be rapidly cooled. The cutting assembly is arranged in the volute assembly, arc tool slots are arranged on the two sides of the bottom end of a cutting tool bit in a mirror image mode, the rotary cutting efficiency of the two ends of the cutting tool bit can be improved through the arc tool slots, hard impurities can be rapidly cut, and the cutting effect is good. A thread protruding ring is in clamped connection with the interior of a ring-hook-shaped avoiding groove and is fixed through aconnection bolt, and connection firmness between the cutting tool bit and a cutting port ring part can be effectively ensured. By means of up-down matching arrangement of the cutting tool bit and thecutting port ring part, impurities are not likely to be clamped in the cutting assembly to caused faults and damage.

The invention discloses a mechanism motion accuracy reliability allocation method considering abrasion, belonging to the technical field of mechanism accuracy design. The method comprises the steps of analyzing the mechanism motion accuracy reliability, then determining design variable and material selection, establishing a cost function of the design variable, establishing an optimization model taking the reliability as constraint and minimum cost as a target, and solving; and finally, according to a processing level tolerance table, selecting the processing level through step four, determining the dimensional tolerance of a member, and verifying whether the degree of reliability of a mechanism is met or not. According to the method, not only can the reliability of the mechanism be ensured, but also a reasonable processing level can be selected under the condition of ensuring the minimum cost; design of allocation from top to bottom and iterated spiral escalation from bottom to top can be realized, the mutual fusion of reliability design and reliability prediction can be realized, and meanwhile, the professional design and reliability are combined, so that the final result can meet the requirement on the degree of reliability.

The invention provides an electric rice cooker with a timed cooking function, which is capable of keeping food inside fresh in a cold storage manner. The electric rice cooker comprises a basic structure of a known electric rice cooker, a cold storage component and a heat insulation layer, a cold storage component cavity and a pot cavity, the heat insulation layer is reserved between a casing and the cavities, the cold storage component cavity and the pot cavity, and the cold storage component is movably disposed in the cold storage component cavity and in thermal connection with the pot cavity. The cold storage component cavity for containing the cold storage component and the pot cavity for containing a pot are separated, so that the cold storage component is capable of cooling the pot cavity, and pollution of the food in the pot by the cold storage component can also be avoided. In addition, the electric rice cooker has the advantages of energy conservation and simple structure. Design aims of the electric rice cooker are achieved.

The invention discloses a column crystal wafer moving device used in the quartz crystal industry, in particular to a column crystal wafer moving device with a bidirectional drive type material sucking head. The column crystal wafer moving device is formed by mainly installing a crystal wafer tray, a jig tool, a synchronous belt, a material sucking part, a motor, an eccentric wheel, the material sucking head, a ball screw and a sliding rail. The synchronous belt drives the crystal wafer tray and the jig tool to move, and the material sucking head adopts bidirectional drive, namely, the material sucking head can move in the direction of the sliding rail after being driven by the ball screw, and can also move up and down under the action of the eccentric wheel driven by the motor. The column crystal wafer moving device is low in using cost and short in part delivery time, meets the accuracy requirement and the performance using requirement, and achieves the purpose of design.

The invention discloses a foot end design method of a bionic robot. The foot end of a cat is simulated, an automatic perception control system which mainly comprises a touch sensor, an A / D converter,a DSP, a D / A converter, a driver and an execution mechanism is related to, the touch sensor is mounted in the foot end of the robot, when the robot walks on different pavements, the touch sensor sendsa signal to the DSP via the A / D converter, the DSP analyzes and processes information from the touch sensor in the foot end and transmits the information to the driver via the D / A converter, the driver drives the execution mechanism to change the shape of the foot end, so that the foot end of the robot can walk on different pavements as the cat, and the walking stability of the robot is improved.

The invention provides a multi-agent system cooperative control method and system based on a reinforcement learning algorithm, and the method comprises the steps: building a multi-agent system, building a value function according to a dynamic graph game model, and employing the value function as a performance index of the multi-agent system; fitting a value function of each agent by adopting a first neural network, and fitting a control strategy of each agent by adopting a second neural network; carrying out online iteration on the value function and the control strategy based on a reinforcement learning algorithm until convergence is carried out to obtain an optimal approximation value reaching Nash equilibrium; and performing cooperative control on the multi-agent system according to the optimal approximation value. According to the multi-agent cooperative control method, the solution of the dynamic graph game is searched on line, the kinetic equation of the agent is not needed, suggestions are provided for the current strategy, the actor neural network provides the control strategy, the actual problem is solved, the purpose of algorithm design is achieved, and multi-agent cooperative control based on the method is more efficient and reasonable.

The invention discloses an automobile seat belt additional safety backing plate for a pregnant woman and a use method thereof. The automobile seat belt additional safety backing plate for the pregnantwoman comprises a force bearing plate part, a left resistance arm part, a right resistance arm part and a clamping tongue part. These structures are arranged as rigidly connected with rigid plate bodies; and the clamping tongue part comprises a clamping tongue main body, a left anchor arm, a left anchor claw, a right anchor arm and a right anchor claw which are rigidly connected with each other.According to the automobile seat belt additional safety backing plate for the pregnant woman, the risk that a fetus may be aborted or dead because the original automobile seat belt tightens the position of a fetus at the crotch of the pregnant woman can be avoided; and assistance is provided to the automobile seat belt in more effectively protecting the safeties of the pregnant woman and the fetus. The automobile seat belt additional safety backing plate for the pregnant woman does not prevent other people from sitting an automobile seat which the pregnant woman sits and can also be stored ina handbag; and the automobile seat belt additional safety backing plate for the pregnant woman can be used at any time when the pregnant woman takes other automobiles to protect the safeties of the pregnant woman and the fetus at any time.

The satellite clutch self control cable hoist does not have brake device, with the rising weight controlled without reverse of the rolling barrel, with the falling of weight free from power influence, with the clutch handle changing friction between the belt and wheel, to allow the quick falling of light loading. It features in the anti reverse device. It is safe, convenient, economical, convenient, and strong in applicability.

The invention discloses a flexible light-emitting panel and a handwriting board, and relates to the technical field of printed electronics. The flexible light-emitting panel comprises a substrate layer, a conductive layer and a light-emitting layer. The substrate layer is made of a flexible material. The conductive layer is arranged on the substrate layer. The conductive layer comprises a positiveelectrode strip and a negative electrode strip which are alternately arranged. The light-emitting layer is made of an electroluminescent material. The light-emitting layer is arranged on the conductive layer and fills the gap between the positive electrode strip and the negative electrode strip. The thickness of the portion, protruding out of the conductive layer, of the light-emitting layer is smaller than the distance between the adjacent positive and negative electrode strips. In the flexible light-emitting panel, by forming conductive writing traces on the light-emitting layer, transitionof electrons of the light-emitting layer can be excited, so that a writing part emits light, and the selection range of writing pens is wide; and the flexible light-emitting panel can be freely curled and carried around.

The invention relates to a main board stretching and edge-cutting composite die structure. The main board stretching and edge-cutting composite die structure comprises an upper module and a lower module; the upper module comprises an upper die seat and an edge-cutting upper female die which are arranged in sequence from top to bottom, the upper surface of the upper die seat is provided with a die handle, and the edge-cutting upper female die is internally provided with a stretching upper die core and an inner stripping plate; the lower module comprises a lower stripper plate, a lower fixing plate and a lower die seat which are arranged in sequence from top to bottom, the lower stripper plate and the lower fixing plate are internally provided with a stretching lower die core and an edge-cutting male die, and the stretching lower die core is arranged on the peripheral side of the edge-cutting male die in a sleeved manner. By means of the main board stretching and edge-cutting composite die structure, stretching and edge-cutting are integrated, the die manufacturing cost is lowered, and the production efficiency of a main board is improved. Since the main board stretching and edge-cutting composite die structure is put into use, qualified products can be stably produced, the design purpose is achieved, and production requirements are met.

The invention discloses an environmental test plan design method and device. With the environmental test plan design method and device of the invention adopted, the test items of an environmental testto be performed can be adjusted by means of the full utilization of historical environmental test data, the efficiency of the environmental test can be improved, and the costs of the test can be reduced. The environmental test plan design method includes the following steps that: the test pass rate and fault sensitivity index of each test item are determined according to the historical test data,wherein the test pass rate is used to characterize the capability of the test item in exciting a product fault, and the fault sensitivity index is used to characterize the efficiency of the test itemin discovering the product fault; the importance index of each test item is determined according to the test pass rate and the fault sensitivity index; and the environmental test plan of a product tobe tested is determined according to the importance index of each test item.

The invention discloses a 60-degree conical beam antenna with 12GHz frequency, which comprises a circular patch antenna which is arranged on the surface layer of a first dielectric substrate and is used for loading a circular gap, a metal column which penetrates through the whole first dielectric substrate, and a feed source and a metal ground which are arranged on the bottom layer of the first dielectric substrate, the microstrip ring is arranged on the top layer of the second dielectric substrate, the metal ground is arranged on the bottom plate of the second dielectric substrate, the first dielectric substrate and the second dielectric substrate are parallel, and the circle centers of the first dielectric substrate and the second dielectric substrate are opposite. The antenna is simple in structure, proper in size, proper in working frequency, large in angle, high in gain and convenient for later design and debugging.

The invention relates to a double direction thrust bearing tester. A rolling bearing seat is arranged in an oil groove; the device is provided with two sets of thrust bearing devices between which a loading piston cylinder is arranged, and both ends of the loading piston cylinder are respectively connected with fixing plates at both sides of the thrust bearing; the two sets of rolling bearings are respectively arranged in the rolling bearing seat; two thrust discs are respectively arranged on an output shaft of a motor; the trust bearing is arranged between a fixing ring and the fixing plate;two sliding rods are respectively fixed on the rolling bearing seats passing through the respective fixing ring and the fixing plate, a sealing which is arranged on the output shaft of the motor is fixed at the side wall of the oil groove, and the output shaft of the motor is connected with the motor through a coupler. The double direction thrust bearing tester of the invention has simple installation and overhaul, and can effectively test and verify the performance of a double direction thrust bearing.

The invention discloses a condition determination method satisfying the similarity law of a multi-stage full-free-flying wind tunnel test. Based on the dynamics and kinematics, the similarity law is derived for the free flight test in a wind-like tunnel. For the first time, the similarity law is designed for the free flight test of two-level or even multi-level models for the shape of the lifting body, focusing on solving the similarity problem of the shape of the lifting body. When the wind tunnel test model meets the limiting conditions, it can ensure that the horizontal line displacement, vertical line displacement, and angular displacement curve obtained by the wind tunnel test are similar to the curves of the real aircraft, ensuring that the wind tunnel test can simulate the separation of the real aircraft. It solves the problem that there is no similarity law guidance for two-stage or even multi-stage full-free flight tests. There is a lack of similarity laws for two or more aircrafts that are completely free in wind tunnel free flight tests. The present invention aims at this aspect and obtains the conditions for satisfying the similarity laws of multi-level full free flight wind tunnel tests.

The invention discloses an ice hockey gate net hook. The ice hockey gate net hook comprises a hooking unit and a positioning unit which are arranged in a mirroring manner, wherein the positioning unitis assembled in the hooking unit; the hooking unit is divided into four portions including an arc-shaped clamping section, a hook-shaped supporting section, an annular hooking section and an arc transition section; one end of the arc-shaped clamping section is connected with the hook-shaped supporting section; the other end of the arc-shaped clamping section is connected with the arc transition section; one end of the hook-shaped supporting section is connected with the annular hooking section while the other end is connected with the arc transition section; the positioning unit comprises positioning reinforcing folded plates and a positioning clamping plate which are arranged symmetrically; the positioning reinforcing folded plates are symmetrically arranged at the upper end and the lower end of the positioning clamping plate; and a bolt positioning groove is formed in the positioning clamping plate. By a double-fixing mode, stationarity of a rope net on the hooking unit can be ensured effectively; when the rope net is subjected to impact force when an ice ball enters the net, it can be effectively ensured that the rope net does not drop; and a mode of welding steel tubes to steel wires is not required, and the ice hockey gate net hook is quite simple and convenient to operate, assemble and disassemble.