51results about How to "Practical value" patented technology

A nonvolatile memory element which can be initialized at low voltage includes a variable resistance layer (116) located between a lower electrode (105) and an upper electrode (107) and having a resistance value that reversibly changes based on electrical signals applied between these electrodes. The variable resistance layer (116) includes at least two layers: a first variable resistance layer (1161) including a first transition metal oxide (116b); and a second variable resistance layer (1162) including a second transition metal oxide (116a) and a third transition metal oxide (116c). The second transition metal oxide (116a) has an oxygen deficiency higher than either oxygen deficiency of the first transition metal oxide (116b) or the third transition metal oxide (116c), and the second transition metal oxide (116a) and the third transition metal oxide (116c) are in contact with the first variable resistance layer (1161).

The invention discloses a deep coal bed gas and heat co-extraction method. The method comprises the steps that 1, a first vertical drilling well is constructed, a heat-preserving casing pipe is adopted for carrying out gas sealing and heat isolating protection for a well hole; 2, construction of a layering horizontal well is carried out according to the thickness of a coal bed, the layering numberK is determined according to the coal bed real thickness M and the gas drainage radius R, and K is equal to M / 2R; 3, a second vertical drilling well is constructed; 4, circumferential dispersing holes of the horizontal well are constructed, and then first extraction of gas is carried out; 5, hydraulic fracturing is carried out on all the drilled holes, a three-dimensional fracture mesh is formed,and then second extraction of the gas is carried out; 6, the first vertical drilling well serves as a water injecting well, the second vertical drilling well serves as a steam output well, the wateris injected into the deep coal bed, the principle of heat transfer is utilized for transferring geothermal energy into the water steam, and the water steam is extracted and utilized. According to themethod, gas extraction and geothermal energy exploitation can be carried out for the deep coal bed which is 1500-3000 meters, the geothermal extraction efficiency is improved, energy is saved, emission is reduced, and the geological environment problems of water and soil pollution, thermal pollution and the like are prevented.

The invention discloses a compressed sensing-based multi-input and multi-output radar two-dimensional angle estimation method. The main objective of the invention is to solve the problems of low accuracy and large computation amount in MIMO (multi-input and multi-output) radar two-dimensional angle estimation in the prior art. The method includes the following steps that: 1) a uniform linear array model is established, and uniform array output signals are obtained; 2) a direction of arrival output uniform linear matrix and an emission angle output uniform linear matrix are respectively constructed through the output signals, and a direction-of-arrival covariance matrix and an emission angle covariance matrix are calculated; 3) a direction of arrival observation vector and an emission angle observation vector as well as a direction of arrival fitting error and an emission angle fitting error are respectively constructed through the elements of the direction of arrival covariance matrix and the emission angle covariance matrix, and a direction of arrival super complete set and an emission angle super complete set are constructed; and 4) the optimal sparse solution of the directions of arrival and the optimal sparse solution of emission angles can be calculated according to the spare relationship between the direction of arrival and emission angle observation vector and the direction of arrival and emission angle super complete set, and a direction of arrival amplitude spectrogram and an emission angle amplitude spectrogram are drawn. With the method of the invention adopted, the operating rate of passive direction finding and angle estimation accuracy under a low signal to noise ratio can be improved. The method can be used for target detection and passive location.

The invention includes reinforced composite container flooring with resin-impregnated veneers, a core layer which may be formed from a structural stone-based panel or a multi-layer wood veneer panel, and its manufacturing processes.

The invention discloses a device for acquiring field data of various kinds of harmful gas. The device comprises a sensor group, a data acquisition module, a multi-channel sensor interface, a data storage unit, a data analysis processing module, a voice alarm prompt unit, a display unit, a parameter setting unit and a data communication interface, wherein an alarm threshold value under the condition that various kinds of harmful gas exist separately, a plurality of danger levels under the condition that various kinds of harmful gas exist simultaneously, and a harmful gas parameter comparison table which corresponds to each danger level are stored in the data storage unit; the data analysis processing module analyzes monitoring information; and the display unit synchronously displays the data which is acquired by the sensor group and the danger level of a monitored area environment at each moment. The device is simple in structure, reasonable in design and easy to use and operate, has full functions, a good monitoring effect and wide application range, can detect whether a kind of harmful gas exceeds the standard, and can analyze, judge and synchronously display the danger level of environment quality under the condition that various kinds of harmful gas exist simultaneously.

The invention discloses a follow-up tracking WIFI transmission device and a control method thereof. The device includes a cloud deck controller, and an acceleration sensor, a geomagnetic sensor, a Beidou navigation receiver, a wireless communication unit, a WIFI unit and an antenna cloud deck connected to the cloud deck controller. The device also includes a directional antenna arranged on the antenna cloud deck. The directional antenna is connected to the WIFI unit. The control method includes determining the coordinates of the device itself through Beidou satellite signals and sending the coordinate information to other access points; determining an optimal communication chain according to the combination of a routing algorithm and the coordinate information of the whole communication access point combined; determining the posture information of the device itself through the geomagnetic sensor; calculating the antenna azimuth angle and controlling the antenna cloud deck for antenna alignment. According to the invention, long range WIFI communication is realized and a problem of dynamic moving network construction of multiple access points when using the directional antenna is solved. Effects in aspects of prolonging WIFI communication distance, improving communication security, improving network invulnerability, reducing electromagnetic interference and the like are obvious.

The synchronous optical pen electronic whiteboard system in the present invention introduces an image sensor with a global shutter, optical pen pulsing light-emission and synchronizing signal transmitter and receiver. The light pulsing of the optical pen and the exposure of the image sensor coincide by synchronizing signal so as to realize the object of increasing signal-to-noise-ratio. A synchronizing signal sender can be arranged in the optical pen and a synchronizing signal receiver arranged in a signal receiving device, or a synchronizing signal sender can be arranged in the signal receiving device and a synchronizing signal receiver arranged in the optical pen. The coincidence of light pulsing and the exposure can be realized in the two solutions, thereby realizing the object of the present invention. By using the solution of the present invention, the power consumption of the optical pen can be reduced effectively and the signal to noise ratio of the system can be effectively increased in the meanwhile.

The invention discloses a method for stimulating a goaf ignition process under U-shaped ventilation. The method is characterized in that grain flow based PFC3D is used as a stimulation platform in consideration of a residual coal seam having a loose and porous structure caused by mining, and the loose and porous structure is in favor of a contact reaction of oxygen and coal in order to stimulate the temperature distribution and energy migration of the residual coal seam in a natural ignition process; extremely small grains are used to stimulate the flow of oxygen and the reaction of oxygen and coal, and the process is realized through FISH; and the method comprises the steps of residual coal seam model construction, stimulation of oxygen in the residual coal seam, and temperature field stimulation effect obtaining and analysis. The method is very suitable for the researches on the determination of the ignition process of the residual coal seam under normal propulsion under U-shaped ventilation.

This invention relates to process cover plastic door and window shape materials device, which belongs to shaping device technique field and comprises core material extrusion machine, core module probe and plane material co-extrusion machine. The invention is characterized by the following: locating a connection cover between the core material extrusion machine and core material module probe; locating core materials main flow and plane co-extrusion at the connection cover; the core main flow left end is connected to core materials extrusion machine cylinder and its right end is connected to the core materials module probes; the ring core materials main flow is located with co-extrusion flow; the plane material co-extrusion flow is connected to the co-extrusion machine through flow guide channel.

The invention relates to a self-locking nut which comprises a nut body and an elastic part, wherein the cross section of the elastic part is a hollow circular shape, the bottom side of the elastic part is fixed on the nut body, and the outer diameter of the bottom side is larger than that of the top; the top is provided with an opening, the size of which is equivalent to the large diameter of a screw hole of the nut body; and one or more rabbet(s) is / are arranged from the opening to the bottom side. The self-locking nut has fewer parts, easy installation and firm locking, so as to shorten the operation time, improve the working efficiency and enhance the fastness of a locking piece.

The invention discloses a method for improving cadmium-contaminated orchard soil remediation capability of solanum photeinocarpum and belongs to the field of remediation of heavy metal pollution environment. The method includes the following steps: planting mining ecotype solanum photeinocarpum in cadmium-contaminated orchard soil by means of direct transplantation or direct seed broadcasting, and after the mining ecotype solanum photeinocarpum enters a rapid growth stage, spraying 1-20umol / L abscisic acid solution on leaf surfaces; at least 30 days after spraying, harvesting overground parts of the mining ecotype solanum photeinocarpum. The method for improving cadmium-contaminated orchard remediation of hyperaccumulator is low in cost, high in operability, environment friendly and effective.

The invention discloses a design method for a transverse electric / transverse magnetic (TE / TM) mode separator based on a photonic crystal imperfect tape. A coupling microcavity wave guiding structure is formed by leading in defect states in a photonic crystal structure periodically, and separation of the TE / TM mode is achieved by controlling the incidence angle of electromagnetic wave. The coupling microcavity wave guiding structure is formed by leading in defect states in the photonic crystal structure periodically, and due to different locality effect of the TE mode and the TM mode in the imperfect tape, waves of the TE mode and the TM mode can be separated under proper incidence angles, the division angle reduces along with increasing of the dielectric constant of the imperfect tape, the division of the two modes can be achieved under the circumference that the incidence angle of the electromagnetic wave is smaller than or equal to 10 degrees, and the design method is suitable for manufacture of the TE / TM mode separator. The design method has large potential application value in the field of physical electronics, optics, materials science, micromotor systems and the like.

The invention discloses a steel tube composite pile and a design method thereof. The design method of the steel tube composite pile comprises the steps that the rigidity, the vertical bearing capacity and the horizontal bearing capacity of the steel tube composite pile are calculated; the steel tube composite pile meeting the requirement for the rigidity, the vertical bearing capacity and the horizontal bearing capacity is designed according to the obtained rigidity, the obtained vertical bearing capacity and the obtained horizontal bearing capacity of the steel tube composite pile. The steel tube composite pile comprises a steel tube, shearing rings, an ant-corrosion coating, a slurry cake and a steel concrete pile body. The design method is suitable for calculating the internal strength ultimate bearing capacity of the steel tube composite pile with the common action of the slurry cake, the anti-corrosion coating and the shearing rings, and positive application value for the calculation of the internal strength ultimate bearing capacity of the steel tube composite pile with the slurry cake, the anti-corrosion coating and the shearing rings is achieved.

The invention discloses a porous silicon micron tube and a preparation method thereof. The porous silicon micron tube comprises the main structural component of porous silicon, the porous silicon micron tube is in a non-sealed round tubular structure surrounded by the porous silicon, the diameter of the porous silicon micron tube is 10-20 microns, and the length of the porous silicon micron tube is 100-600 microns. The porous silicon micron tube is characterized in that a high-porosity porous silicon layer is prepared by a proper preparation condition, and the porous silicon micron tube is obtained by self-breakage and self-bending processes according to the uneven characteristics of stress in porous silicon by a special drying technology. Because the porous silicon has a special structure characteristic, the porous silicon has a bigger specific surface area as well as good mechanical property and maneuverability once the tubular structure is formed, and the porous silicon has a great potential application value in various fields, such as physical electronics and optics, biomedicine and chemistry, materialogy, micromotor systems and the like.

The invention relates to a method for detecting the moving state of an obstacle in real time by a mobile robot in an environment. The method consists of a computer and a mobile robot system. A single-chip microcomputer control unit of the mobile robot system controls an ultrasonic generator to emit multiple groups of pairwise continuous ultrasonic waves to the same front obstacle. The obtained time difference of every two echoes is transmitted to a computer through a data acquisition card or in a wireless mode, and the moving speed, direction and distance of the measured obstacle in the moving direction of the robot are calculated through a calculation formula derived by the method. By calculating multiple groups of echo signals, the fusion speed or the average moving speed can be obtained, so that the moving speed of the measured obstacle with high measurement precision is obtained. The bottleneck that the mobile robot must move slowly to detect the moving speed of the obstacle in an approximately static mode is broken through, the speed measurement method is accurate and efficient, the moving flexibility of the mobile robot is enhanced, and effective obstacle avoidance is achieved. The method is particularly suitable for a micro-miniature mobile robot system.

The invention relates to a coupling joint for a plane joint robot and manufacturing equipment for the coupling joint. The coupling joint is provided with a connecting column body. The upper end of theconnecting column body is in a bulb shape, and the lower end of the connecting column body is in a column shape. A lubricating sleeve and a connecting shell are arranged at the outer side of the bulb-shaped portion of the upper end of the connecting column body in sequence from inside to outside. The manufacturing equipment is provided with an initial station, a filling device A, a lubricating oil application device, a filling device B, an extruding device and a separating device, wherein the initial station is used for allowing the connecting shell to be placed thereon; the filling device Ais used for allowing the lubricating sleeve to be mounted thereon; and the filling device B is used for allowing the connecting column body to be mounted thereon. By means of the coupling joint, the traditional design of similar bearing structures is changed; the wear resistance and lubrication effects of a graphene coating are fully utilized; the bearing capacity in the vertical direction can beremarkably increased on the basis of structure simplification; meanwhile, the better self-adaptive adjustment and support capacities are achieved in the horizontal plane direction, and the extremely high practical value is achieved; and meanwhile, the manufacturing equipment for the coupling joint is efficient, convenient and fast to use, and the whole coupling joint can be implemented conveniently.

The invention relates to a photoelectric mousetrap adopting a computer. The photoelectric mousetrap comprises a touch control panel and an electronic control panel, wherein a rotating shaft driven by an electric motor is arranged in the central area of the touch control panel; a mouse trapping casing is mounted on the rotating shaft, open at one end and adopts a hollow structure; the mouse trapping casing is gradually enlarged from one end to the other end in the horizontal direction; the opening end part is the larger end part of the mouse trapping casing; and an electric lifting door capable of vertically moving up and down is arranged at the opening end part of the mouse trapping casing. The photoelectric mousetrap adopting the computer is simple in structure and reasonable in design, sufficiently utilizes sensing of the touch control panel to the mouse, and can be embedded into a wall corner of a large warehouse; meanwhile, the opening position of the mouse trapping casing is adjusted through control of a computer chip in the electronic control panel according to the movement position of the mouse, the mouse is guided to enter the mouse trapping casing, and then the mouse can be trapped after the electric lifting door is closed rapidly; and the photoelectric mousetrap is simple and efficient and has a great practical value.

The invention provides a small wind-light-stored energy supplementary power generation cluster autonomous control system based on a wireless sensor network. The operation condition of a wind-light-stored energy supplementary power generation cluster is monitored in real time through the ZigBee wireless sensor network technology, wireless networking is achieved through the ZigBee technology, the network is formed through all the wind-light-stored energy subsystem monitoring points, a ZigBee network center node communicates with a monitoring center in a GPRS mode, and therefore a distributed type remote transmission communication monitoring system based on ZigBee and the GPRS is established. The system is mainly formed by integrating multiple distributed measurement and control RTU intelligent units of the power generation cluster. Each distributed measurement and control RTU intelligent unit is composed of a distributed intelligent control unit, a data acquisition unit module, a relay route module, a concentrator module, a ZigBee wireless communication module, a ZigBee relay route module and a GPRS communication module. Potential advantages of light, wind and stored energy multi-energy supplementary micro-grid system are used, the autonomous control system is in a main mode of distributed new power operation in future, a research system has the practical value, the application prospect of the wind-light-stored energy supplementary power generation cluster autonomous control system is wide, and the application number is large.

The invention relates to a self-tensile strength measuring mold of a flame-spraying nylon coating layer. The self-tensile strength measuring mold comprises a mold body; and a through hole is formed inthe middle of the mold body. A cylinder is arranged at one end of the mold body; a cylindrical boss is arranged at the other end of the mold body; and a cooperating hole is formed in the cylindricalboss, wherein the inner diameter of the cooperating hole is larger than the outer diameter of the cylinder by 1mm. The self-tensile strength measuring mold has advantages of actual practical value, great convenience, high practicability, and accurate testing.

The invention discloses a medical automatic turn-over bed. The medical automatic turn-over bed comprises a bed frame and a bed plate, wherein the bed plate is formed by splicing two secondary bed plates; the secondary bed plates are positioned on sides of the middle part of the bed frame and are hinged to the bed frame; and edges of the outer sides of the two secondary bed plates are respectively connected with overturning mechanisms. When needing to turn over, a patient can start a motor through a wireless remote controller of the overturning mechanisms, the secondary bed plate on one side is overturned and lifted at a certain angle through the corresponding overturning mechanism, the overturning lifting process is stable, the medical automatic turn-over bed is safe and convenient to use, the patient can turn over when unattended, and meanwhile, each secondary bed plate is further provided with a socket powered by solar cells. The medical automatic turn-over bed is convenient to use, is energy-saving and environmentally friendly, and meets requirements of the patient to power consumption of charging of mobile phones and the like.

The invention discloses an AUV (Autonomous Underwater Vehicle) autonomous obstacle avoidance method based on reinforcement learning. The method comprises the following steps: firstly, setting an AUV seabed navigation autonomous obstacle avoidance logic rule; if the foresight sonar cannot detect the obstacle, enabling the AUV to keep the existing navigation height to pass through the obstacle; if the foresight sonar detects the obstacle and the height of the obstacle can be determined, determining the height of the obstacle, and pulling up the AUV to enable the navigation height of the AUV to exceed the obstacle to pass through the obstacle; if the foresight sonar detects an obstacle and the height of the obstacle cannot be determined, enabling the AUV to start an autonomous yaw strategy and bypasses the obstacle in a yaw mode; and enabling the AUV autonomous yaw strategy to adopt a reinforcement learning model based on strategy gradient to determine an optimal yaw angle to bypass an obstacle. According to the method, various factors such as the task execution time, the angle deviating from the main route and the obstacle distance are comprehensively considered, and optimal strategy obstacle avoidance which is autonomously achieved under various constraints is achieved.

The present invention relates to a self-locking nut which comprises a nut body and an elastic part, wherein the cross section of the elastic part is a hollow circular shape, the bottom side of the elastic part is fixed on the nut body, and the outer diameter of the bottom side is larger than that of the top; the top is provided with an opening, the size of which is equivalent to the large diameter of a screw hole of the nut body; and one or more rabbet(s) is / are arranged from the opening to the bottom side; the joint part of the bottom side of elastic part and the nut body is arc-shaped. The self-locking nut has fewer parts, easy installation and firm locking, so as to shorten the operation time, improve the working efficiency and enhance the fastness of a locking piece.

A mouse with replaceable wires includes a mouse body, a transmission line and a clamping structure; the mouse body is provided with a clamping space, and a body connecting port is arranged adjacent to the clamping space; the transmission line includes a first connecting end and a second connecting end. Two connection ends, the first connection end has a first connection port for plugging into the body connection port of the fastening space, and the second connection end has a second connection port for plugging into the computer host; the fastening structure It is set at the first connection end of the transmission line, and is used to fasten the first connection end to the fastening space of the mouse body; the user can operate the fastening structure to disassemble the transmission line from the mouse body, and replace it with different lengths as needed transmission line.