80results about How to "Play a positive role" patented technology

A split container is proposed for the preparation of a beverage, preferably espresso coffee, using a granular, water-extractable substance (KP). Here, between the container base (7) and the substance (KP) and between the container lid (4) and the substance (KP), a dispensing device provided with a large number of holes (8, 14) for dispensing water or beverages is arranged. elements or collecting elements (2, 3). The collecting element (2) and the distributing element (3) are provided with at least one groove (10, 15) pointing to the inside of the container, while the piercing member (20, 21) can penetrate the container bottom (7) or the container cover (4 ) then extend in the grooves (10, 15).

The invention provides a waterproof pavement structure and a construction method thereof. The waterproof pavement structure comprises a finishing coat, a basement layer, a water draining bedding layer and a roadbed from top to bottom, wherein a waterproof layer is arranged between the basement layer and the water draining bedding layer, the waterproof layer is naturally separated from the basement layer and the water draining bedding layer, and a permeable filter layer is arranged between the water draining bedding layer and the roadbed. The construction method of the structure comprises the step of: sequentially paving the roadbed, the permeable filter layer, the water draining bedding layer, the waterproof layer, the basement layer and the finishing layer from bottom to top. The pavement structure can effectively prevent the pavement and the road bed from the damages of road surface water and ground water, thereby prolonging the service life of the road.

The invention discloses a system for detecting formaldehyde emission rate of an artificial board, which comprises a detection box device, an air path device, a water path device, a cyclic sampling device and a system control system; wherein the detection box device has a hollow cavity therein for accommodating a sample to be detected; the air path device is used for filling air into the hollow cavity of the detection box to keep the pressure in the cavity at a standard test pressure; the water path device is used for providing a heat-insulation layer for the detection box device and heating the air filled into the detection box to keep the temperature in the cavity of the detection box device at the standard test temperature; the cyclic sampling device is used for collecting the mixture gas of air and formaldehyde emitted from the test sample in the detection box device and detecting the mixture gas sample to obtain the formaldehyde emission rate in the sample; and the system control device is used for respectively controlling the pressure, the temperature and the sampling sequence of the air path device, the water path device and the cyclic sampling device. The inventive detection system has the advantages of short detection time, high control accuracy, easy operation, etc.

The invention relates to an intelligent interactive puppet show playing system and a control method of the intelligent interactive puppet show playing system. With the adoption of the intelligent interactive puppet show playing system and the control method of the intelligent interactive puppet show playing system provided by the invention, the problem that the conventional puppet show is limited in a representation pattern can be solved. According to the main points of the technical scheme, a power supply module supplies power to the intelligent interactive puppet show playing system; the intelligent interactive puppet show playing system comprises a puppet and a stage; the intelligent interactive puppet show playing system further comprises a system main control device and puppet control devices assembled on puppets; each puppet control device comprises a puppet control chip, a puppet communication chip, at least one puppet joint control device and a puppet movement control device for controlling the puppet to move; the puppet control chips are connected with the system main control device in a communication manner through the puppet communication chips; the puppet movement control devices are electrically connected with the puppet control chips; and the puppet joint control devices are further electrically connected with the puppet control chips. With the adoption of the intelligent interactive puppet show playing system and the control method of the intelligent interactive puppet show playing system provided by the invention, a puppet show can be automatically played; the puppet play can be actually and entirely replayed; and the representation patterns are rich.

The invention provides a human-computer interaction system, method and equipment capable of regulating user emotion. The human-computer interaction system capable of regulating the user emotion comprises a face acquisition module, a face recognition module and a human-computer interface regulation module, wherein the face acquisition module collects the face information of the user; the face recognition module is connected with the face acquisition module to recognize the face information and determine an emotion type to which the face micro-expression of the user belongs; and the human-computer interface regulation module is connected with the face recognition module and regulates the display state of a human-computer interface according to the emotion type to which the face micro-expression of the user belongs. The user micro-expression is recognized mainly through a face recognition technology, the user emotion generated when the user uses the human-computer interaction system can be judged, so that the content of the human-computer interface is subjected to the switching of aspects including theme templates or colors and the like so as to achieve humanized color interface interaction, a user can regulate the emotion in a short time, and the human-computer interaction system positively influences the user.

The thermal treatment process for an aluminum-magnesium-manganese wrought aluminum alloy containing erbium belongs to the filed of metal alloys. The existing aluminum alloy thermal treatment process has the problems of strength reducing, corrosion resisting performance reducing after long term use, etc. The invention aims at providing the thermal treatment process for an aluminum-magnesium-manganese cold-rolled sheet containing erbium, which is realized by homogenizing annealing, hot rolling, cold rolling, stabilizing annealing and other process steps, wherein the stabilizing annealing process comprises the steps that, a cold-rolled sheet is annealed at the temperature of 100-400 DEG C and insulated for 1-48h; the annealing temperature and the insulating time are preferably 125-250 DEG C and 1-8h respectively. The thermal treatment process of the invention ensures the alloy to acquire excellent corrosion resisting performance under the condition that the high plasticity of the aluminum-magnesium-manganese cold-rolled sheet containing erbium is kept at a higher level; the treated alloy can be used for a long time with basically constant performance, and the service range of the alloy is wide.

The invention provides a method for myoelectrically controlling an artificial hand simulation system of a virtual robot. The method comprises the following steps: (1) collecting data of a right front arm of a tester; (2) adopting an electrode clung to a skin layer above related forearm muscle for collecting a myoelectricity signal; (3) performing signal pretreatment of rectifying, amplifying and filtering on the myoelectricity signal; (4) performing feature extraction on the myoelectricity signal and extracting a stable feature vector of the myoelectricity signal; (5) cutting the collected stable feature vector into a training set and a test set, utilizing the training set to train the selected classifier and then classifying the signals of the test set; (6) transferring the signal data after the signal classifying process to the after-treatment link; (7) after the after-treatment for the signal, namely, controlling a command signal and sending the command signal to a virtual hand simulation system; (8) assuming a visual feedback function by the virtual hand in the artificial hand simulation system of the robot and feeding the real-time state of the virtual hand to the brain; (9) judging if the hand action is an assumed action by a user through visual feedback.

The present invention relates to the field of building, bridge and harbor engineering, and provides a pre-stress FRP bush-FRP rib sea sand seawater expansion concrete combination column, which comprises an external FRP bush and internal FRP rib sea sand seawater expansion concrete, wherein the FRP bush wraps the sea sand seawater expansion concrete, self-stress is generated in the FRP bush and the concrete through the expansion of the concrete and the restriction of the FRP, uniformly distributed FRP longitudinal ribs are arranged on the periphery close to the sea sand seawater expansion concrete combination column, and penetrate through the sea sand seawater expansion concrete from top to bottom, and FRP spiral stirrups are bound around the FRP longitudinal ribs from the outer side along a top-to-bottom direction of the combination column according to the same interval and the same spiral angle. According to the present invention, the pre-tensile stress is generated in the FRP bush through the micro-expansion of the expanded concrete so as to effectively improve the axial limit bearing force of the combination column; and the river sand is replaced by the sea sand, the fresh water is replaced by the seawater, and the steel bar is replaced by the FRP rib, such that the performance of the combination column is improved, the limitation of the application of the sea sand seawater in the practical engineering is broken through, and the positive effect is provided in the protection of the ecological environment.

The invention relates to the field of casting production of internal cooling oil channel pistons, in particular to a flexible salt core taking, placing and positioning system based on visual recognition. The flexible salt core taking, placing and positioning system comprises a robot, a flexible taking-placing paw, an integrity degree detection visual system and positioning and recognition visual systems. According to the flexible salt core taking, placing and positioning system based on the visual recognition, the tough clamping force of three-jaw air cylinders is converted into the gentle clamping force of clamping springs, so that the damage to a salt core which is relatively low in strength and toughness and easy to break is avoided; limiting blocks are used for limiting the eccentricity of fingers, and the positioning precision is guaranteed within the allowable tolerance range; the integrity of the salt core is judged through the integrity detection visual system; the angle of thesalt core is accurately adjusted through the positioning and recognition visual systems and servo motors; and meanwhile, stroke adjusting nuts are adjusted so that the flexible salt core taking, placing and positioning system can be compatible with the salt cores of various specifications and sizes, and has a wider application range.

The invention discloses a flotation separation process for mixed copper and lead concentrate. The flotation separation process is characterized by comprising the steps of pretreatment, flotation separation and gravity concentration, and concretely comprises the following flows of performing ore grinding and reagent removal on raw ore; adding a combined inhibitor which consists of the combination of H2O2, ferric chlorate and sodium thiosulfate, a collecting agent and a foaming agent, and performing rough concentration, refining and scavenging to obtain lead concentrate and copper rough concentrate; performing the gravity concentration on the copper rough concentrate in a high centrifugal field after the gravity concentration is performed on the copper rough concentrate to obtain copper concentrate and middling products; returning the middling products to the step of the flotation separation for cycle operation after the ore grinding is performed on the middling products. According to the flotation separation process disclosed by the invention, in allusion to a joint separation process adopted by mixed copper sulfide and lead concentrate, the mixed copper and lead concentrate is effectively and comprehensively utilized and efficiently recovered; the process is simple, and the operation is convenient.

The invention relates to a taxi service system and method based on two-dimensional codes. The taxi service system comprises a customer communication terminal and a public taxi requisition platform, wherein the customer communication terminal comprises an acquisition and analysis module, a taxi requisition information communication module and an information receiving module; and the public taxi requisition platform comprises an information communication module and an information sending module. The taxis service method comprises the following steps: the customer communication terminal acquires a two-dimensional code picture; the customer communication terminal analyzes the acquired two-dimensional code picture to obtain taxi using information; the customer communication terminal sends taxi requisition information to the public taxi requisition platform according to the obtained taxi using information; the public taxi requisition platform receives the taxi requisition information and sends the taxi requisition information to a confirmed taxi dispatching platform according to the taxi requisition information; the public taxi requisition platform receives feedback information sent by the taxi dispatching platform; and the public taxi requisition platform sends the received feedback information to the customer communication terminal. According to the taxi service system and method disclosed by the invention, the dispatching capability of a taxi company can be improved, the deadhead kilometers of a taxi are reduced, and convenience is provided for a passenger to take a taxi.

The invention discloses system and method for monitoring users of playing games from third party. The monitoring system includes device of processing information of games, game server, and device of processing monitored information through the game server for monitoring users of playing games. Building monitoring relation between user of playing games and the monitoring party makes the device of processing monitored information possible to obtain game information of the device of processing monitored information. Based on obtained game information, the device of processing monitored information controls operations of the device of processing information of games. Therefore, the said third party can monitor actions of users of playing games so as to make users of playing games obtain fun from games but not abandon themselves to games. The invention prevents negative influence from games and gave play to positive influence from games.

The invention discloses an ecological method and an application for controlling quantity of spirogyra biomass in lakes. The ecological method comprises the steps of: breading tilapias in lakes where submerged plants are grown; controlling the quantity of the tilapias to minimize influence of the tilapias on the submerged plants and effectively control spirogyra. The ecological method provided by the invention can prevent chemical toxicity brought by chemical method for controlling spirogyra and reduce manpower and property waste caused by manually catching sponge; and the harvested tilapias can bring a certain economic benefit; furthermore, the ecological method also can effectively control the quantity of pomacea canaliculata. As can be seen, the ecological method and application for controlling the quantity of the spirogyra biomass in lakes can be applied to maintaining the lake ecosystem, and is environment-friendly.

The invention relates to the technical field of piston processing, in particular to a flexible gripping mechanism for salt cores. The flexible gripping mechanism comprises a connecting flange, a three-jaw cylinder, a limiting press-putting assembly and a claw finger assembly. According to the flexible gripping mechanism for the salt cores, movement of fingers is limited by limiting blocks, clamping is soft, and the salt cores which are easy to break and low in strength and toughness are prevented from being damaged during clamping; the height of the limiting blocks on a center rod can be adjusted, so that the flexible gripping mechanism for the salt cores can be suitable for the salt cores of various specifications and sizes; and meanwhile, downward-press springs and downward-press platespress the salt cores, the salt cores are stable without moving and rotating when clamped, and the salt cores can be pressed into a mold and put in place when the salt cores are placed.

The invention relates to a plant composition capable of delaying skin aging. The plant composition comprises extracts of the following raw materials by weight: 30-70 parts of radix asparagi, 10-50 parts of ginseng, 10-50 parts of grape seeds, 10-50 parts of Angelica sinensis, 10-50 parts of almonds, 10-50 parts of rhizoma polygonatum, 10-50 parts of radix ophiopogonis, 10-50 parts of radix astragali, 10-50 parts of bletilla striata, 10-50 parts of pria cocos and 10-50 parts of lily. The plant composition provided by the invention can play a role of delaying skin ageing and is safe in use.

The invention discloses a psychological accompanying robot and an emotion supporting method. The psychological accompanying robot comprises an emotion recognizing module, an emotion comforting and supporting module, an operational analysis control module and a data transmission module, wherein all the modules are integrated to a mechanical shell and are arranged in a doll cotton cover. The psychological accompanying robot acquires the information such as the expressions, actions and languages of a user through the emotion recognizing module, analyzes and judges the emotions through the operational analysis control module, generates an emotion supporting strategy and then achieves psychological accompanying through the emotion comforting and supporting module. Communication between the robot doll and a mobile phone can be achieved through the data transmission module, and integration of all the information and sharing of equipment hardware can be achieved. According to the psychologicalaccompanying robot and the emotion supporting method, the psychological accompanying robot can be carried along as a mascot or a pendant, interaction can be achieved through the modes such as the expressions, actions and sounds to carry out psychological accompanying and emotion comforting, and the psychological accompanying robot can become a most faithful friend and a companion of the user.

The invention relates to a medical beating apparatus and a manufacturing method thereof, in order to solve the problems of like products which, although taking a certain effect on beating parts and pulse positions of a body, fail to achieve an ideal bodybuilding purpose due to different structures. The medical beating apparatus provided by the invention is subject to two design schemes. The medical beating apparatus of both the first design scheme and the second design scheme comprises a beating frame and a beating layer, wherein the beating frame is covered by the beating layer and an outer layer, and the beating layer is composed of a cotton yarn layer and a gauze layer; according to the first design scheme, the medical beating apparatus has a beating net, while according to the second design scheme, the medical beating apparatus is not provided with the beating net. The medical beating apparatus disclosed by the invention has the advantages that the beating apparatus is reasonable in structural design and is relatively accurate to beat the pulse positions in the body; the manufacturing method is feasible, and the medical beating apparatus can take a certain positive effect and can achieve a function of boosting immunity. Meanwhile, the medical beating apparatus is also suitable for the technical transformation of existing like products, and the beating apparatus is capable of taking a positive enlightening role.

Production of polyether polybasic alcohol for subfluoride hard foaming is carried out by: adding mixture of alditol and alcohol amine with weight ratio 2.03-2.77:1-1.77 into reacting pot with agitator and internal cooling coil pipe as initiator, adding alkali hydroxide 0.1-1wt% as catalyst, heating to 80-100deg.C, polymerizing, adding olefine oxide 2.55-3.65 proportions into reacting pot with reacting pressure 0.2-0.8Mpa and reacting time 3-10hrs, aging for 1.5-3.5hrs with temperature 80-130deg.C, dewatering, neutralizing, taking organic acid solution as neutralizing agent, or taking mixture of sodium hydropyrophosphate and phosphoric acid as neutralizing agent with neutralizing temperature 110-130deg.C for 1.5hrs, adsorptive dewatering, removing ion including K+ and Na+ by hexamagnesium silicate adsorbent, dewatering under vacuum, filtering and filtering impurity. It achieves simple process and material, low viscosity and no environmental protection.

The invention discloses three-directional roll riveting equipment of a through-flow fan blade, and belongs to the technical field of the roll riveting equipment of the through-flow fan blade. The three-directional roll riveting equipment comprises a base, a roll riveting system, a fixing and driving system, a guiding system and a conduction system, wherein the roll riveting system comprises a roller row; the roller row is arranged parallel to the base and comprises an upper roller row, a lower front roller row and a lower rear roller row; the upper roller row is arranged over a machined blade wheel and is provided with an upper roll riveting hob set of which a hob edge is vertically downward; the lower front roller row and the lower rear roller row are symmetrically arranged at two sides of a vertical plane on which a center line of the machined blade wheel is positioned and are provided with a lower front roll riveting hob set and a lower rear roll riveting hob set of which hob edges are obliquely upward respectively; and the upper roll riveting hob set, the lower front roll riveting hob set and the lower rear roll riveting hob set form a three-directional roll riveting structure. During machining, the blade wheel is uniformly stressed in three directions so as to ensure that machining pressure is always aligned with the center, the coaxial heights of central discs of the blade wheel are consistent, and the blade wheel is prevented from performing circular runout.

The invention relates to a bodybuilding beat and a manufacturing method thereof, in order to solve the problems of like products which, although taking a certain effect on beating parts and pulse positions of a body, fail to achieve an ideal bodybuilding purpose due to different structures. The bodybuilding beat provided by the invention is subject to three design schemes. The beat of both the first design scheme, the second design scheme and the third design scheme comprises a beating frame and a beating layer, wherein the beating frame is covered by the beating layer and an outer layer, and the beating layer is composed of a cotton yarn layer and a gauze layer; according to the first design scheme, the beat has a beating net, according to the second design scheme, the beat is not provided with the beating net and according to the third design scheme, an adjustable beating layer strap is arranged on the beating layer. The bodybuilding beat disclosed by the invention has the advantages that the beat is reasonable in structural design and is relatively accurate to beat the pulse positions in the body; the manufacturing method is feasible, and the beat can take a certain positive effect and can achieve an ideal bodybuilding purpose. Meanwhile, the bodybuilding beat is also suitable for the technical transformation of existing like products, and the beat is capable of taking a positive enlightening role.

The invention discloses a board edge sealing device with an automatic feeding function in the technical field of board edge sealing. The device comprises a worktable and boards; an electric roller anda driven roller are in transmission through a transmission belt; stop devices are uniformly arranged on the outer side wall of the transmission belt; a pressing device is hinged to the front side ofthe top of the worktable; an edge sealing strip shelf is arranged on the front side of the worktable; a gluing nozzle is arranged at the top of the worktable; a glue box is arranged at the bottom of the worktable; a conveying belt drives the boards to move to the right side at constant speed; the gluing nozzle sprays glue to the side edges of the boards at constant speed, so that the glue is uniformly coated on the front side edges of the boards, the edge sealing strips are bonded firmly, the waste of the glue is prevented, the labor intensity of workers is reduced, and the working efficiencyis improved; the end, far from support blocks, of a baffle plate on the left sides of the boards is pulled by a return plate; and the baffle plate shields the left sides of the boards to prevent sliding of the boards to the left side.

The invention relates to a wind turbine generator blade unmanned aerial vehicle inspection defect detection method and device and a storage medium. The method comprises the following steps: utilizing an unmanned aerial vehicle to inspect and collect an original image of a wind turbine generator blade, and carrying out image segmentation on the original image along the blade direction to obtain a plurality of segmented sub-images containing blade areas; inputting the plurality of segmented sub-images into a blade defect detection network model, and performing blade defect detection to obtain defect information of the segmented sub-images; and according to the defect information of the segmented sub-images, obtaining the type and the position of the defect on the wind turbine generator blade, wherein the blade defect detection network model is obtained by constructing a blade defect detection network and performing network training, and the blade defect detection network adopts a Yolo v4 neural network. According to the method, the Yolo V4 neural network is adopted for identifying the major defects of the blade, and compared with a traditional computer vision algorithm, the method is more stable.

The invention relates to main pipe press-fitting equipment for an automobile engine. The main pipe press-fitting equipment for the automobile engine comprises a bottom board, a main pipe positioning device installed in the middle of the bottom board, an inner sleeve positioning device arranged below the main pipe positioning device, upper sleeve positioning block devices, lower sleeve positioning block devices and pushing devices, wherein the upper sleeve positioning block devices, the lower sleeve positioning block devices and the pushing devices are symmetrically arranged on the two sides of the main pipe positioning device. Compared with the prior art, the stability is good, and torsion or generation of gaps between threads of an inner sleeve and an upper sleeve as well as between the threads of the inner sleeve and a lower sleeve is avoided.

The invention provides a prawn pond ecological polyculture method. Before water is introduced into the pond, a purse net is arranged at the central region of the pond; after water is introduced into the pond, prawns are bred outside the purse net, then omnivorous fishes are bred inside the purse net, meanwhile, a small amount of carnivorous fishes are bred outside the purse net in a cooperation machine, and finally, shellfishes are bred outside the purse net in a handing manner. A water drainage hole is formed in the bottom of the center of the pond, and in the cultivation process, the pond isaerated by adopting an aerator, and water in the pond rotates around the water drainage hole. According to the method, through the arrangement of the purse net, multispecies of fishes are cultured inpartition in the pond in a mixing manner, the omnivorous fishes in the purse net is beneficial to improve the water quality of the aquaculture pond and can not swim to a prawn culturing area outsidethe purse net to eat prawn feed;a proper amount of the carnivorous fishes are cultured outside the purse net in a mixing manner to eat sick and weak prawns and dead prawns, so that the propagation ofprawn diseases can be prevented and controlled; the shellfishes are cultured in the prawn culturing area in a mixing manner, so that the filter-feeding effect on organic debris and plankton can be enhanced, and further the water can be cleaned; due to polyculture of multispecies of fishes at the different partitions in the same pond, the ecological niche of the water body in the pond can be reasonably utilized, and the overall ecological benefits of culture can be improved.

The invention relates to the technical field of 3D printing, in particular to a three-dimensional model forming method in a 3D printing method and the 3D printing method, and the three-dimensional model forming method is used for forming a three-dimensional model of a target substance in an object. The method comprises the following steps: carrying out tomographic scanning on the object to obtaina plurality of tomographic images of the object; decoloring the plurality of tomographic images to obtain gray tomographic images; scanning and analyzing the plurality of gray tomographic images, anddetermining a selection threshold of the target substance in the gray tomographic images; according to the selection threshold, carrying out batch processing on the plurality of gray tomographic images, removing image information outside the area determined by the selection threshold in each tomographic image, and obtaining a plurality of tomographic images of the target substance; and generatingthe three-dimensional model of the target substance according to reverse scanning of the plurality of tomographic images of the target substance. By using the method, the model can be conveniently formed by using the tomographic images in a bitmap format, and the three-dimensional model of the target substance can be directly formed.

The system is composed of data terminal of automatic teller machine (ATM), monitor room, entrance guard controller, electric control lock, video recording monitor, talk back device, magnetic card reading header, go-off pushbutton and ATM as well as housing cap of ATM. When alarming code input is occurred in ATM, alarming link gear recognizing the code, which is same as the withdrawal cipher code, starts up automatically, and locks the door of housing cap of ATM so as to control illegal withdrawal and prevent offender from escaping.

The invention relates to a rare earth coating for preventing high-temperature oxidation corrosion of an electrolytic anode and a preparation method. The rare earth coating for preventing high-temperature oxidation corrosion of the electrolytic anode comprises the following raw materials in parts by weight: 20-60 parts of a binder, 25-50 parts of a modified high-temperature filler, 5-15 parts of ahigh-temperature self-healing filler, 0.5-10 parts of a functional rare earth filler and 0.5-5 parts of an inorganic suspending agent. The preparation method comprises the following steps of: mixing all the raw materials, homogenizing for 1-3 hours under a high-speed stirring condition, and grinding until D50 is less than or equal to 2 mum. According to the rare earth coating for preventing high-temperature oxidation corrosion of the electrolytic anode, emission of carbon dioxide and fluorocarbon can be reduced, rare earth elements are introduced into the coating, and the quality of electrolytic metal can be improved while the performance of the coating is improved.

The embodiment of the invention discloses an air inlet device for an atomic layer deposition technology and an atomic layer deposition device. The air inlet device comprises a first air inlet block and a second air inlet block, the first air inlet block is inserted into a second center air inlet through hole formed in the second air inlet block, a first annular sealing cavity area and a second annular sealing cavity area which are isolated from each other are formed between the inner wall of the second center air inlet through hole and the side wall of the first air inlet block, the side wallof the first air inlet block is provided with a first air inlet hole used for enabling the first sealing cavity area to communicate with a first center air inlet through hole and enabling the second sealing cavity area to communicate with the first center air inlet through hole, and the side wall of the second air inlet block is provided with a second air inlet hole which communicates with the first sealing cavity area and the second sealing cavity area. By means of the air inlet device and the atomic layer deposition device, the problem that two kinds of precursors are chemically reacted in the primary stage of the air inlet end due to mixing can be prevented, granules produced by the air inlet end in the atomic layer deposition technology can be effectively reduced, and a positive effectis achieved on technology stability.

The invention provides a deep ultraviolet LED and a manufacturing method thereof. The deep ultraviolet LED comprises a substrate; an N-type semiconductor layer, a multi-quantum well layer, an electron blocking layer and a P-type semiconductor layer which are sequentially arranged on one side of the substrate, wherein the electron blocking layer is made of diluted magnetic materials. The electron blocking layer of the diluted magnetic material can block electrons and also has a forward effect on hole injection, space wave function overlapping of the electrons and the holes is improved, and then the light emitting efficiency of the deep ultraviolet LED is improved.

The invention discloses a simple and easy ampere force demonstrator, which comprises a magnet, wherein the magnet is in a horizontal U shape; a horizontal rail is arranged in an opening of the magnet; and a hollow aluminum pipe capable of moving along the horizontal rail is arranged on the horizontal rail, and is connected with a direct current power supply through a switch. The simple and easy ampere force demonstrator has the characteristics of simple structure and convenience for manufacturing. When used in teaching, the simple and easy ampere force demonstrator can intuitively demonstrate an effect generated by ampere force, can increase the learning interest of students, and plays an active role in learning.