157results about How to "Increase training difficulty" patented technology

The invention discloses a crowd density estimation method based on a multi-scale convolutional neural network, and in order to improve the accuracy of crowd density estimation in the field of video monitoring, the invention provides a network structure based on the multi-scale convolutional neural network, which can accurately predict a crowd density map in a scene. According to the method, feature fusion of different receptive field information is carried out by using the cavity convolution and the original convolution, and different levels of semantic information of the feature map under different resolutions are fused, so that the crowd density map with higher quality is generated. An experiment is carried out on a current popular ShanghaiTech data set, a UCF_CC_50 data set and a WorldExpo '10 data set, and an average absolute error (MAE) and a mean square error (MSE) are used as evaluation criteria. The result shows that compared with the previous method, the network model has theadvantages that the MAE value and the MSE value are reduced, and the crowd density estimation accuracy is improved.

The invention relates to ball serving equipment, in particular to table tennis ball serving equipment for sports training and aims at achieving the technical purpose of providing the table tennis ballserving equipment for sports training with a good training effect and a higher training difficulty. The invention provides the table tennis ball serving equipment for sports training. The equipment comprises a box body, a feeding hopper, a feeding tube, a ball discharging tube, a buffering cushion, an intermittent feeding device and the like; the feeding hopper is installed on the left side of the top of the box body, the feeding tube is installed below the feeding hopper, the feeding hopper is communicated with the feeding tube, the feeding tube is communicated with the box body, the ball discharging tube is horizontally installed in the middle of the left side face of the inside of the box body, openings are formed in the left and right ends of the ball discharging tube, and the buffering cushion is installed in the middle of the bottom of the ball discharging tube. According to the equipment, balls are constantly fed to the ball discharging tube by the intermittent feeding device,an ejecting device is driven by a driving device to eject the balls out so that table tennis training of a user can be conducted to achieve the effects of good training effect and higher training difficulty.

The invention provides a knowledge inference method and system of a knowledge graph based on meta-knowledge and a medium, the training difficulty does not significantly increase with the increase of the scale of the knowledge graph, the inference accuracy is more advantageous, and the method comprises the following steps: step 1, data set construction: establishing a data set composed of knowledgegraph triples: a head entity, a relationship and a tail entity; step 2, data re-processing: re-learning the initialized embedded vectors of the entities in the data set through a data re-processing model to obtain semantics of the entities and obtain final embedded vectors of the entities; step 3, model training: constructing a knowledge inference model, and inputting triples in the data set subjected to data reprocessing into the knowledge inference model for model training to obtain a trained knowledge inference model; and step 4, knowledge reasoning: scoring the alternative tail entities in the knowledge graph triad through the trained knowledge reasoning model, and selecting the tail entity with the highest score as a reasoning result of the knowledge reasoning model.

The invention relates to a ball server, in particular to a table tennis server. Therefore, the invention aims to provide a table tennis server which can prevent arm ache and improve serving efficiency. The table tennis server comprises a support, a stand, a stopping block, a swinging seat, a first ball tube, a funnel, a first spring, a launching device, a first strut, a sliding sleeve, a rack, a clamping rod, a third spring and the like; and the stand is mounted on the left side of the top of the support, the stopping block is fixed on the upper portion of the left side surface in the stand, the swinging seat is hinged to the right side of the upper portion of the stand, and the first ball tube capable of launching table tennis balls is arranged on the bottom of the swinging seat. Througha motor, a sector gear rotates clockwise, therefore, the table tennis balls can be launched through the launching device, people do not need to throw out the table tennis balls manually, thus, the labor intensity of people can be reduced, and the training efficiency can be improved; and by regulation of the launching angle of the table tennis balls, the difficulty of training for athletes can be increased.

The invention relates to serving equipment, in particular to table-tennis random-serving equipment. Through the table-tennis random-serving equipment, the technical aims that table tennis can be served out in different directions at random, the training effect is good, and the training requirements of training persons are met are achieved. The table-tennis random-serving equipment is characterizedby comprising a supporting base, a supporting rod, a containing frame, a 7-shaped plate, a first bearing base, a first rotating shaft, a hard tube, an arc plate, a discharging tube and the like; the7-shaped supporting plate is fixedly connected to the right side of the top of the supporting base, five emitting tubes are evenly and fixedly connected to the right side face of the 7-shaped supporting plate at intervals, and a feeding tube is connected to the left sides of the tops of the emitting tubes. According to the table-tennis random-serving equipment, the table tennis is put into the containing frame, falls into through holes at random through front-and-back swinging of the hard tube, and is emitted out through one emitting tube, randomness is better, the training difficulty is improved, the training effect is thus better, training persons do not need to look for other persons for sparring, and the training requirements are met.

The invention relates to the technical field of martial art training devices, in particular to a simulated training system for martial art. The system comprises a chassis, a supporting column is arranged on the chassis, and the supporting column is connected with the chassis through an elastic piece; a striking body is arranged on the supporting column, a striking arm is arranged on the striking body, and the striking arm is hinged with the striking body; elastic structures are arranged on the outer surfaces of the striking body and the striking arm, the elastic structures comprise elastic sleeves, and a plurality of first elastic airbags and second elastic airbags are arranged on the elastic sleeves; air inlets are formed in the first elastic airbags and the second elastic airbags, a plurality of air outlet pipes are arranged on the first elastic airbags and used for being communicated with other first elastic airbags or the second elastic airbags, and second air outlet pipes communicated with the outside are arranged on the first elastic airbags and the second elastic airbags. The provided simulated training system for martial art can solve the problems that an existing trainingdevice is more inflexible, the confrontation effect cannot be provided, and the training effect is poor.

The invention discloses auxiliary equipment for boxing training teaching, and relates to the technical field of boxing training equipment. The auxiliary equipment comprises a base, an electric telescopic column is fixedly installed at the top of the base, a supporting frame is rotatably connected to one side of the electric telescopic column, a first sliding groove is formed in the supporting frame, and a lead screw is rotatably connected to the interior of the first sliding groove; a first motor is fixedly installed on one side of the supporting frame, and the output end of the first motor is fixedly connected with the lead screw. The auxiliary equipment for boxing training teaching has the beneficial effects that the hanging ball is combined with the support, the equipment is convenient to install and move, and the moving device is installed at the top of the hanging ball and located on one side of the support, so that when the hanging ball rebounds under the action of force, the hanging ball can move back and forth, the auxiliary equipment is matched with a pulley block and a motor at the top of the hanging ball, and the lifting and rotation of the boxing hanging ball are controlled, so that the real boxing condition is simulated to the greatest extent, and the reaction capability and sensitivity of a user are improved.

The invention relates to a 360-degree omni-directional intelligent movable target drone, and belongs to the field of shooting training equipment including target drone equipment for military training,athlete training, outward training and the like. The 360-degree omni-directional intelligent movable target drone comprises a fixing seat and a movable base. The fixing seat is carried by the movablebase and is provided with target plates by the aid of a target frame, the movable base is provided with travel wheels, the travel wheels are Mecanum wheels and are connected with travel driving devices, and a control system is connected with the travel driving devices. The 360-degree omni-directional intelligent movable target drone has the advantages that the Mecanum wheels are used as the travel wheels, accordingly, the 360-degree omni-directional intelligent movable target drone can omni-directionally move, the target plates carried on the 360-degree omni-directional intelligent movable target drone can flexibly move, and the training difficulty can be increased for trainees during training.

The invention belongs to the technical field of a sport appliance, and particularly relates to a tennis training device for training response of a tennis player. The tennis training device for training the response of the tennis player comprises a moving base, a position regulating mechanism, an angle regulating mechanism, a tennis emitting mechanism, a tennis adding mechanism and a tennis collecting mechanism, wherein the position regulating mechanism is fixed on the top of the moving base and is used for driving the angle regulating mechanism, the tennis emitting mechanism, the tennis addingmechanism and the tennis collecting mechanism to perform position regulation in the transverse linear direction. Through the moving base, the position regulating mechanism, the angle regulating mechanism, the tennis emitting mechanism, the tennis adding mechanism and the tennis collecting mechanism can be conveniently driven to move, so that the tennis training device can conveniently move in indoor and outdoor positions; when the tennis training device is not used, the tennis training device can be moved to the indoor position for storage; and through the arrangement of the position regulating mechanism, the transverse positions of the angle regulating mechanism, the tennis emitting mechanism, the tennis adding mechanism and the tennis collecting mechanism can be regulated so as to realize cooperation with the angle regulating mechanism.

The invention relates to the technical field of fitness equipment. The invention discloses a balance training instrument capable of adjusting the training difficulty. The balance training instrument comprises a base, a protective baffle is fixedly connected to the upper surface of the base, a motor is fixedly connected to the interior of the base, a first rotating shaft is fixedly connected to theouter side of the motor, a first transmission gear is fixedly connected to the surface of the first rotating shaft, and a second transmission gear is fixedly connected to the outer side of the firsttransmission gear. The rotating handle is rotationally arranged on the reversing device, the reversing device is meshed with the sliding rod, the sliding rod moves left and right, the sliding rod drives the speed adjusting gear to move left and right, the rotating speed is increased when the speed adjusting gear is meshed with the second transmission gear, and the rotating speed is decreased whenthe speed adjusting gear is meshed with the third transmission gear, so that the effects that the exercise difficulty can be improved by adjusting the rotating speed, and the fitness equipment can besuitable for different crowds or crowds in different exercise stages are achieved.

The invention provides an abdominal muscle exerciser with an adjustable headrest, comprising a base, a supporting column, a seat bracket, a seat, a backrest bracket, a backrest, a foot bar bracket, a first foot bar and a second foot bar, wherein the base is fixedly connected with the lower end of the supporting column; a rotary pair part is arranged at the upper end of the supporting column; the front end of the rotary pair part is connected with the seat bracket and the seat; the front end of the seat bracket is connected with the foot bar bracket; the foot bar bracket is provided with the first foot bar and the second foot bar; the back end of the rotary pair part is connected with the backrest bracket and the backrest; hand rest brackets are arranged at the two sides of the lower part of the backrest and the backrest can rotate up and down along the rotary pair part; a triangular positioning frame and a load bearing bracket are arranged below the backrest bracket; and a loading disc is arranged on the load bearing bracket. The abdominal muscle exerciser disclosed by the invention is a special fitness machine which can increase the load and improve the exercising difficulty, and is used for exercising abdominal muscle.

The invention belongs to the field of machinery, and particularly relates to a mechanical badminton training device. The technical problem to be solved is to provide a more practical mechanical badminton training device capable of increasing training difficulty. The device comprises a box body, vertical plates, a first motor, a first bearing seat, a lead screw, a nut, a sliding rail and the like;the vertical plates are connected with both left and right sides of the top of the box body, the first motor is installed on the right side of the vertical plate arranged on the left side, the first bearing seat is installed on the left side of the vertical plate arranged on the right side, the lead screw is connected with the interior of the first bearing seat, the nut is movably arranged on thelead screw, the left end of the lead screw is connected with the output shaft of the first motor, and the sliding rail is installed on the top of the box body. According to the device, an elliptical plate can be driven to move left and right through the forward and backward rotations of the first motor to hit badminton balls towards the elliptical plate to perform training, the elliptical plate isdriven to rotate slowly through the slowly rotation of the second motor, and therefore the training difficulty can be increased.

The invention discloses a boxing practice response training device for students, and relates to the technical field of training instruments. The training device comprises a base, a supporting column is fixedly installed at the top of the base, a supporting rod is slidably connected into the supporting column, a connecting block is slidably connected to the top of the supporting rod, a first motor is fixedly installed on one side of the connecting block, an eccentric cam is fixedly installed at the output end of the first motor, and one side of the eccentric cam is rotationally connected with a connecting rod. The boxing practice response training device for students has the beneficial effects that: an electric telescopic rod in a training plate is matched with a telescopic frame, the electric telescopic rod is used for driving the telescopic frame to enable a stress plate to extend out of limiting holes, the attention of a trainee is attracted, the trainee cannot predict the motion trails of the stress plate in the multiple limiting holes, and the device helps to improve the sensitivity of the trainee; and a pressure sensor is installed in the stress plate, and the punching strength of the trainee each time can be recorded.

An agile ladder structure for football training, comprising a fixed ladder frame, a hurdle and a storage mobile car; the structure body is provided with a fixed ladder frame; The distance adjustment placement groove and the ladder frame connecting groove are formed; the side wall of one end of the fixed ladder frame is provided with a ladder frame connecting block; the other end of the fixed ladder frame is provided with a ladder frame connecting groove; the upper end of the fixed ladder frame Ladder distance adjustment placement slots are symmetrically opened; ladder bars are installed inside the ladder distance adjustment placement slots; the upper end of the fixed ladder frame is also symmetrically connected and installed with hurdles; wheel composition. The agile ladder structure used for football training is provided with a ladder frame connecting block that fits closely with the ladder frame connecting groove, and the ladder frame connecting block can be embedded and installed inside the ladder frame connecting groove. The side is inserted into the connecting groove of the ladder frame for fixed connection, which is convenient for the lengthening and use of the structure body.

A tennis ball serving device solves the problems that an existing tennis ball serving device is single in function and low in application range, and different training modes cannot be adjusted according to the levels of different learners to improve the tennis technology of the learners. The tennis ball serving deviceincludes a lifting frame, an angle-adjustable launching cylinder, a driving shaft and a racket frame capable of rapidly swinging back and forth, an ejection rod is arranged in the launching cylinder, an ejection rack is fixedly connected to the ejection rod and meshed with an incomplete gear, the incomplete gear is coaxially and fixedly connected with a first regular polygon prism, and the first regular polygon prism is rotationally connected with a shell. The driving shaft is provided with a plurality of driving teeth which are circumferentially and uniformly distributed, the front ends of the driving teeth are flush, the lengths of the rear ends of the driving teeth are sequentially increased, and the first regular polygon prism is provided with an adjustable driven gear. The tennis ball serving device is diversified in function, different modes can be switched for training, the training difficulty and the training intensity can be adjusted according to the level of a learner, the application range is wide, and the tennis skill of the learner can be improved conveniently.

The invention discloses a multifunctional balance rehabilitation training machine based on a Stewart platform. The machine comprises a base, the Stewart platform, a pedal and armrests; the armrests and the Stewart platform are mounted on the base, and the pedal is fixed on the Stewart platform. The multifunctional balance rehabilitation training machine is high in structural stability and motion precision, the motion in the six-degree-of-freedom direction of the three-dimensional space can be achieved, balance training with different strengths can be designed according to demands of people, and the multifunctional balance rehabilitation training machine integrates the functions of massaging the feet and promoting balance training.

The invention relates to a multifunctional intelligent target machine. A base, a rotation disc and an installing disc are included. Four universal wheels symmetrically distributed are fixedly arrangedat the bottom of the base. The rotation disc is fixedly arranged on the top of the base. The bottom of the rotation disc is fixedly provided with a linkage rod located in the base. The outer portionof the linkage rod is movably provided with a transmission mechanism. The installing disc is located on the top of the rotation disc. A fixing mechanism is movably arranged in the installing disc. A target rod is movably arranged on the top of the installing disc, and a fixing table is fixedly arranged on the top of the target rod. Through the arrangement of a clamping-fit mechanism, a target plate can be placed in the fixing table and abuts against coinciding blocks, the two sides of the target plate extrude the coinciding blocks, springs conduct bounce and clamping, and the installing process is simpler and more convenient. By utilization of the arranged transmission mechanism and the arranged rotation disc, when shooting personnel conducts shooting, a motor drives the rotation disc to rotate through transmission, the target plate can rotate, the shooting difficulty is increased for the shooting personnel, and the shooting training effect of the shooting personnel is better.

The invention discloses a balance beam core stable strength training and monitoring device based on a projector, and relates to a balance training device. The device solves the problems that an existing balance beam is single in training means, and lacks the balance beam core stable strength training and monitoring means combined with a projection system. The balance beam core stable strength training and monitoring device based on the projector conducts image transmission on a surrounding projection screen through the projector to enable a trainer to conduct training under the visual impact environment, so that the aim of intercoordination whole between the visual sense and the body is achieved. The device can reflect the balance state of the trainer in real time and enable the trainer to know the balance state of himself in real time, and therefore the trainer can adjust the training state of himself initiatively. The device has the communication function and can transmit the detected balance state in the training process to other devices. The balance beam core stable strength training and monitoring device based on the projector is suitable for the fields such as physical education, medical treatment, aviation and navigation.

The invention belongs to the field of sport equipment, and particularly discloses an intelligent ping-pong ball serving machine. The machine comprises a base frame vehicle, a ball serving mechanism, aball serving motor, an allocating mechanism, a ball conveying part and a controller. The ball serving mechanism comprises a ball distributing plate and a ball serving ring. The ball distributing plate comprises a ball inlet in the center of the ball distributing plate, a ball sliding tube and a ball driving part and is suitable for sliding ping-pong balls from the ball inlet to an edge part to beserved; a sliding groove matched with the ball driving part is arranged in the ball serving ring, and a ball serving tube is arranged on the edge. The allocating mechanism and the ball distributing plate are fixed to distribute and block the ping-ping balls. The ball distributing plate is assembled in the ball serving ring and is fixed to a support of the base frame vehicle through a shaft connecting part, and the ball distributing plate rotates around the axis of the ball serving ring and relative to the ball serving ring. The ball conveying tube of the ball conveying ball is communicated with the shaft connecting part on one side, and is suitable for the ping-pong balls to be conveyed to the ball inlet through the shaft connecting part. The control device controls the ball serving machine to change ball serving positions and adjust the longitudinal and transverse serving angles, so that serving modes are complex, the training difficulty is high, and training requirements of different levels and different persons are met.