80results about How to "Improve interference" patented technology

The invention relates to the technical field of machine learning, in particular to a keyboard key pressure identification method and device based on deep learning. The method comprises the following steps: acquiring initial pressing stroke data of a single key of a keyboard; performing pressure measurement on a single key corresponding to the initial pressing stroke data by using a pressure sensor to obtain keyboard key pressure measurement data; keyboard pressing effective stroke screening is carried out on the initial pressing stroke data of the single key of the keyboard through the keyboard key pressure measurement data, and keyboard pressing effective stroke data are obtained; obtaining keyboard key structure data; and performing three-dimensional pressing depth identification on the keyboard key pressure measurement data according to the keyboard pressing effective stroke data to generate keyboard three-dimensional pressing pressure identification data. According to the method, through a multi-step technology of accurate pressing stroke screening, three-dimensional pressure distribution identification, mistaken touch correction, contact optimization and the like, the accuracy and error interference of keyboard key pressure identification are improved.

The invention discloses an intelligent wave recording and traveling wave ranging integrated design method and system, relates to the technical field of power systems, and comprises heterogeneous data fusion processing including hardware isolation and independent acquisition, a clock synchronization mechanism, data caching and alignment, data format standardization, algorithm optimization and fusion, and data verification and correction. Large-capacity and multi-backup mixed storage is achieved, and combination of multiple storage media, data redundancy backup and improvement of data reliability are included; starting based on multivariate information collection, wherein the starting comprises analog quantity starting, switching value starting, GOOSE message starting and station control layer message starting; the comprehensive distance measurement algorithm comprises establishment of an electromagnetic-circuit framework model, construction of a comprehensive distance measurement model, solving of an objective function through an optimization algorithm, correction of a preliminary fault point coordinate estimation value, realization of a power fault accurate positioning system and support of computer equipment and a storage medium. The problem of single recorded data is solved, and the data processing speed and the flexibility of the system are improved.

The utility model relates to the field of air conditioner air outlet devices, in particular to a central air conditioner air outlet noise reduction device which comprises an air receiving barrel, a bucket-shaped air expanding cover, an air outlet cover, a noise reduction frame, an air direction guiding frame and a protection frame. A hopper-shaped air expanding cover is arranged at the lower end of the air receiving barrel, an air outlet cover is arranged at the lower end of the hopper-shaped air expanding cover, an embedded groove is formed in the end, away from the hopper-shaped air expanding cover, of the air outlet cover, and a noise reduction frame, an air direction guiding frame and a protection frame are sequentially arranged in the embedded groove. According to the air conditioner air outlet device, noise generated by airflow resonance is effectively reduced through the air expansion flow guide design of the hopper-shaped air expansion cover and the sound absorption cotton plate filling of the sound attenuation and noise reduction frame, airflow can be evenly and softly blown to a room through the design of the air direction guide frame, and the problems that airflow in a traditional air conditioner air outlet device is too strong and uneven in distribution are solved.

The invention provides an acousto-optic combined detection method for multi-angle inclined surface damage of an underwater facility, and belongs to the technical field of tests and tests. The method has the advantages that the problems that the influence of water quality on multi-angle inclined surface damage of underwater facilities is large when an optical means is adopted, the detection efficiency is low, and the detection resolution is low when a traditional image sonar means is adopted are solved. An acousto-optic combined detection module composed of a side-scan sonar, a ranging sonar and an underwater optical camera is carried in the detection direction of an underwater carrier, and a rotation steering engine in the pitching direction controls the overturning angle of the detection module, so that the detection direction of acousto-optic detection equipment is perpendicular to surfaces to be detected at different inclination angles. And the rotation of the side-scan sonar array is controlled by a rotary steering engine in the rolling direction relative to the pitching angle, so that the installation direction of the array is consistent with the maneuvering direction of the underwater carrier, and the maneuvering state of the carrier is controlled according to the data of the distance measurement sonar to keep the consistent distance from the detection mechanism to the surface of the facility, so as to obtain a high-resolution acoustic image. A suspected area where the damage is located is judged through an acoustic image, and after the carrier approaches, an optical camera and an underwater light source are adopted for sequentially photographing and judging suspected positions, so that the surface damage condition of the underwater facility is determined.

The invention provides a multi-component thin film evaporation film thickness monitoring and adjusting device and method and application, the multi-component thin film evaporation film thickness monitoring and adjusting device comprises a conveying module used for conveying a substrate so as to deposit a film layer on the moving substrate through a first evaporation source and a second evaporation source, the conveying module is provided with a position sensing module, and the position sensing module is used for sensing the position of the film layer on the moving substrate through the first evaporation source and the second evaporation source; a trigger signal is generated when the substrate enters the set area; the first film thickness monitoring module is used for acquiring the deposition speed of the first evaporation source and the thickness of a film layer deposited on the substrate; the second film thickness monitoring module is used for acquiring a reflection spectrum of the second evaporation source in a set area; and the control module is used for obtaining the film thickness according to the reflection spectrum of the second evaporation source through an inversion algorithm, and independently feeding back and controlling the real-time evaporation working condition. The thickness of materials with different evaporation rates is subjected to differential parallel monitoring, a closed-loop feedback system is formed, the film thickness monitoring accuracy is improved, and long-time operation of monitoring work is guaranteed.

The invention discloses an insulator for a direct current converter transformer and an online monitoring method thereof, and relates to the technical field of insulators. According to the insulator for the direct current converter transformer, the insulator body and the connection structure are internally integrated with a multi-stage state monitoring system comprising a first-stage sensing unit, a second-stage sensing unit and a third-stage sensing unit; according to the invention, three types of key state data of internal mechanical stress of the insulator, the connection state of the first metal accessory and the second metal accessory and the overall temperature distribution can be synchronously acquired in real time, real-time monitoring of the insulator and multi-dimensional comprehensive information acquisition are realized, early warning is realized based on the multi-dimensional comprehensive information, and the reliability of the insulator is improved. According to the method, preliminary early warning can be carried out according to single data, meanwhile, time-space alignment and comprehensive judgment can be carried out on multi-dimensional data, high-level fault early warning is carried out, the stability and reliability of the insulator are improved, and sudden faults are reduced.

The utility model provides a wire harness with a flame-retardant structure, which relates to the field of wire harnesses, and comprises an inner core assembly, the main body of the inner core assembly is a cable, and the outer side of the inner core assembly is wrapped with an inner insulating layer. In order to solve the problem that a corresponding flame-retardant structure needs to be arranged due to the fact that the cable is fractured when being worn and is easily subjected to detonation and other potential safety hazards when being connected with an external conductor at a high temperature, multiple insulation and shielding structures, namely an inner insulation layer, an outer insulation layer and a shielding layer, are arranged, so that the insulation performance and the anti-electromagnetic interference capability of the wire harness are greatly improved, and the service life of the wire harness is prolonged. The electric leakage risk caused by poor insulation is effectively reduced, the potential safety hazard of detonation caused by connection between high temperature and an external conductor is avoided, the safety performance of a traditional wire harness is innovatively improved, and the design of the spiral tensile assembly enhances the tensile capacity of the wire harness.

The application discloses a polyethylene pipe surface micro-defect real-time detection system based on machine vision, and relates to the technical field of monitoring and analysis, which comprises the following steps: constructing a dynamic deformation matrix by associating timestamp, three-dimensional height difference data and temperature drop gradient data; calculating the relative deformation rate corresponding to the unit temperature drop gradient data according to the dynamic deformation matrix; generating a bubble determination result when the three-dimensional height difference data represents inward collapse displacement, the relative deformation rate nonlinearly decreases with the increase of the temperature drop gradient data, and the difference value of the last section is lower than a preset stop threshold; generating an impurity determination result when the three-dimensional height difference data represents outward protrusion displacement, and the fluctuation variance of the relative deformation rate falls within a preset rigidity interval; establishing a corresponding relationship between the bubble determination result, the impurity determination result and the initial coordinates of the suspected target, and outputting detection result data. The application has the effect of improving the real-time detection efficiency of polyethylene pipe surface micro-defects.

The utility model provides a kind of multifunctional flip type mobile phone shielding box, including box and soundproofing module, box includes outer storehouse body and the flip of rotation connection in outer storehouse body, soundproofing module is composed of outer soundproofing layer and inner soundproofing layer, and inner soundproofing layer is equipped with the mobile phone accommodating cavity of accommodating, mobile phone accommodating cavity bottom is equipped with the sound interference collection recording interference module of interference sound and wireless charging module;Outer storehouse body inside is equipped with storage chamber, and soundproofing module is arranged in storage chamber, the inner wall of the chamber box is equipped with shielding component, when the flip is covered on outer storehouse body, the shielding component and soundproofing module hinder mobile phone accommodating cavity and the sound and signal transmission of outside. The utility model reduces the sound pickup effect of mobile phone to outside sound by recording interference, electromagnetic shielding and independent soundproofing module cooperation, improves the recording interference and electromagnetic shielding effect of shielding box.

The invention relates to the technical field of oil and gas fracturing flow-back fluid treatment, and particularly discloses a boron-doped diamond electrode electrooxidation system and method for treating fracturing flow-back fluid. According to the method for treating the fracturing flow-back fluid, before the fracturing flow-back fluid enters an electrooxidation unit, sulfide is efficiently removed, poison and competitive oxidation of the fracturing flow-back fluid to an electrode are eliminated, a BDD electrode is protected, a foaming agent is synchronously removed through aeration enrichment, the problem of foam interference in the flow-back fluid treatment process is fundamentally solved, and continuous and stable operation of a system is guaranteed; after the electro-oxidation unit, active chlorine (pypocholoride / chlorine) is effectively removed and recycled, so that waste is treated by waste, the oxidation efficiency is improved, and the dosage of chemicals is reduced. Through the collaborative design, the interference and foam problems of sulfide with high chloride ion content and strong reducibility are collaboratively optimized, and the treatment efficiency, economical efficiency and stability of the system are integrally improved.

The present application relates to the technical field of machine learning, and more particularly to a classroom student behavior detection optimization method based on deep learning, which extracts features from each frame of image of student video in the classroom, obtains corresponding high-dimensional semantic feature vectors, reduces the dimension of the high-dimensional semantic feature vectors of each frame of image, maps the three-dimensional feature vectors of each frame of image to a three-dimensional clustering space, obtains corresponding data points, filters the data points in the three-dimensional clustering space to obtain a target clustering space, and according to the multi-frame continuity similar features and the similar light environment features of any two data points, the distance measurement of any two data points in the target clustering space is enhanced and clustered, and a plurality of image categories are obtained, the deep learning model is trained using the plurality of image categories, and a trained deep learning model is obtained, which is used for classroom student behavior detection, and improves the interference ability and detection recognition accuracy of the deep learning model.

The utility model relates to fluid control technical field especially relates to a flow path control valve and fluid control device, including the support plate, the flow guide plate, the frame board and the bottom plate that form the overall structure in turn layering together along the thickness direction, the frame board has the opening part, still include the valve plate, the valve plate has the deformation part and the junction part that connect, the valve plate is fixed in the bottom plate through the junction part, and the outer peripheral edge of deformation part exists a part as the free area, and the deformation part can produce the elastic deformation under the pressure effect, the utility model discloses flow path control valve is advantageous to further promote the thin degree of the air leakage valve on one hand, the other hand makes the overflow passage formed after the deformation of deformation part not depending on the hole structure of deformation part can realize the communication of inlet hole and flow guide hole, and therefore deformation part can realize maintaining the overall structure, can better inhibit the risk that deformation part appears the deformation even the cracking because of setting the hole structure, ensure the stability and reliability of control valve work, improve the service life.

The invention relates to the technical field of flexible electronics, in particular to a flexible conductive film and a preparation method and application thereof. The flexible conductive film is obtained by drying a solution containing PEDOT: PSS, a water-soluble polymer, a viscous auxiliary agent, a humectant and a polar solvent, in the solution, the mass content of the PEDOT: PSS is 0.1%-1%, the mass content of the water-soluble polymer is 0.2%-3%, the mass content of the viscous additive is 0.5%-10%, the mass content of the humectant is 1%-10%, and the mass content of the polar solvent is 1%-8%. The flexible conductive thin film provided by the invention has relatively good flexibility, stretchability and adhesion, also shows excellent properties such as good biocompatibility and motion interference resistance, and is suitable for long-range monitoring of electrophysiological signals.

This disclosure relates to a camera module and an electronic device. The camera module includes: a first decorative member having an accommodating space for accommodating a first lens group of the camera module; wherein the first decorative member has a grounded conductive portion; a second decorative member disposed on the first decorative member and having a light-transmitting area aligned with the opening of the accommodating space; the second lens group of the camera module covering the light-transmitting area; and conductive adhesive disposed between the first decorative member and the second decorative member, and electrically connected to the conductive portion and the second decorative member respectively. By providing conductive adhesive and grounding it, embodiments of this disclosure can reduce electrostatic interference generated by the electrical portion of the second decorative member on the camera module, and also achieve connection stability between the first and second decorative members.

This application discloses a composite fixing structure for fixing a PCB, comprising: a carrier plate with multiple adsorption holes; a first abutment edge and a second abutment edge fixedly disposed on the periphery of the carrier plate; multiple pressure blocks disposed on the first abutment edge; a venting plate fixedly disposed below the carrier plate, the venting plate including a normally venting area and a first venting area; a first through hole in the first venting area selectively connected to or disconnected from a vacuum pump, and the first through hole in the first venting area opens or closes progressively from the side closer to the normally venting area to the side farther away from the normally venting area; and a pressure plate movably disposed above the carrier plate; the projection of the pressure plate on the carrier plate in a first direction is longer than the length of the carrier plate in the first direction, and the projection at least covers a portion of the first venting area. This composite fixing structure organically integrates vacuum adsorption and mechanical pressing, and can adaptively adjust the adsorption area and pressing position according to the PCB size, ensuring fixing reliability.

The application provides a method and device for planning drone swarm interference, electronic equipment and storage medium. The method comprises the following steps: constructing an interference planning objective function based on the path length and interference benefit of the drone swarm, and constructing an interference constraint condition based on a preset drone interference rule; determining an interference planning population of the drone swarm including at least one interference planning result based on the interference constraint condition and a target to be interfered; the interference planning result includes an interference path and an interference duration of at least one drone; determining a target interference planning result based on the interference planning population, a population expansion rule and a population selection rule; the population selection rule includes a rule for selecting based on an interference function value of each interference planning result calculated by using the interference planning objective function. According to the scheme, the interference path and the interference duration of the drone swarm are planned at the same time, the optimization of the drone path and the interference duration is realized, and the interference cost of the drone is reduced.

The utility model relates to the field of unmanned aerial vehicles, in particular to fixed unmanned aerial vehicle interference equipment, and aims to overcome the defects that in the prior art, the angle cannot be automatically adjusted, the direction cannot be automatically adjusted, and the interference range is small. The base is fixedly connected to the top of the fixing plate, and the top of the base is rotationally connected with a supporting column; the supporting plate is fixedly connected to the top of the base, and one side of the supporting plate is fixedly connected with a first motor; the first transmission shaft is fixedly connected to an output shaft of the first motor, and one end of the first transmission shaft is fixedly connected with a worm; and the transmission assembly is meshed on the worm. Furthermore, the transmission assembly comprises a worm gear meshed with the worm, a second transmission shaft is fixedly connected to the worm gear, the angle can be automatically adjusted, the direction can be automatically adjusted, and the interference range is expanded.

This invention discloses a hardware device and control method for automatic charging of robots, aiming to solve the technical problems of poor charging contact reliability, disconnect between software and hardware protection, and lack of authentication in existing technologies. The device includes a control unit (CMU), a contact quality detection sensor, and an independent hardware gate circuit. Furthermore, the device has a low-voltage wake-up function, actively outputting a small voltage supply when the robot's battery is depleted. The CMU is configured to perform a digital handshake for authentication and a contact quality check before main charging; main charging only starts after both are successful. The independent hardware gate circuit forcibly disconnects the main power switch when the CMU fails (e.g., fails to send a heartbeat signal). This invention significantly reduces the risk of charging-related safety accidents, improves charging connection stability, and avoids accidental charging of incompatible batteries through a dual-layer software and hardware protection closed loop.

This utility model relates to a testing device for optical lenses, including a base, an outer sleeve and a sleeve assembly coaxially disposed above the base. The outer sleeve is rotatably mounted on the base via a first rotation drive assembly. A clamping assembly is provided on the top of the inner sleeve for clamping the optical lens to be tested. A pattern card holder is fixedly installed at the center of the base for providing standard test patterns. Several testing cameras are distributed circumferentially on the inner wall of the outer sleeve, with the shooting ends of the testing cameras all pointing towards the concentric axis of the device. This utility model uses a composite motion control system, where the first rotation drive assembly drives the outer sleeve to rotate, the second rotation drive assembly drives the inner sleeve to rotate independently, and a lifting drive assembly controls the overall height. The high-speed rotation of the inner sleeve and the synchronous or differential rotation of the inner and outer sleeves meet the testing requirements under different dynamic conditions, ensuring the accuracy of the testing results.

The present invention provides an on-orbit calibration method for a space target posture measurement system that integrates vision and laser, which is used to solve the technical problems that the existing calibration methods based on special calibration objects such as chessboards have poor versatility in setting calibration objects for specific usage scenarios, or the existing calibration methods based on ordinary scenarios have large computational complexity and high requirements for computing resources. The on-orbit calibration method for a space target posture measurement system that integrates vision and laser provided by the present invention first establishes a joint calibration model of a visual sensor and a laser rangefinder, and on this basis, improves the traditional orthogonal iteration algorithm from two aspects: calculation of iterative initial values ​​and simplification of iterative algorithms, so as to solve and optimize the posture conversion relationship between the laser coordinate system and the visual coordinate system. It only uses a part of a non-cooperative target in space as a laser projection target, and can achieve on-orbit high-precision calibration of the joint posture measurement system of a visual sensor and a laser rangefinder.

The invention provides a time service interference method and device, and the method comprises the steps: constructing a multi-composite time service interference signal, and simulating a multi-source time service interference condition; and multiple composite time service interference signals are transmitted, so that the real time service signals are unlocked by the target time-consuming equipment, and the multi-frequency takeover interference signals are locked. The invention further comprises a device for implementing the method. According to the invention, the time service interference signal in a complex environment is simulated and generated, and a test basis is provided for improving the time service interference resistance and time safety guarantee performance of the target time-consuming equipment.

The invention provides an optical microcavity dispersion measurement method based on dispersion linetype real-time calibration, which is applied to the technical field of microcavity dispersion measurement, and comprises the following steps: converting the position extraction of an optical sideband into the position extraction of a dispersion linetype, and demodulating the optical sideband through a frequency mixer to obtain a sideband harmonic peak of a specific dispersion linetype; adjusting the phase difference between a modulation signal and a demodulation signal of the high-stability radio frequency source, identifying the position of a dispersion line type sideband harmonic peak, and extracting the frequency interval of the sideband harmonic peaks on the two sides of each resonance mode; dynamically calibrating the optical fiber Mach-Zehnder interferometer based on the number of sinusoidal signal cycles in the frequency interval of the dispersion line type sideband resonance peaks on the two sides of each resonance mode to obtain a calibrated Mach-Zehnder interferometer; and generating a dispersion measurement result of the optical microcavity according to the calibrated Mach-Zehnder interferometer interference signal. According to the invention, the dispersion measurement precision and the automation level can be improved.

This utility model discloses an automatic loading and unloading device for metal quenching, including a lifting frame, a clamping frame below the lifting frame, a locking rod on the outside of the clamping frame, a locking sleeve on the outside of the locking rod, a releasing sleeve rotatably located on the outside of the locking sleeve, a top block on the outside of the releasing sleeve, a rotating sleeve slidingly located on the outside of the locking sleeve, an inclined block on the outside of the rotating sleeve, a push spring movably located on the outside of the locking sleeve, multiple moving blocks movably located on one side of the releasing sleeve, a moving sleeve located on the outside of the locking sleeve, an interactive plate on one side of the moving sleeve, a transverse plate on one side of the interactive plate, a configuration plate rotatably located on the outside of the locking sleeve, a configuration slot on the configuration plate, moving springs between the moving blocks, multiple locking blocks on the outside of the locking sleeve, a flexible groove on the inside of the rotating sleeve, a flexible block movably located in the flexible groove, and a locking frame on one side of the flexible block. This utility model realizes tool-free and convenient adjustment of the position of the clamping frame, while ensuring the structural stability of the clamping frame after the position is adjusted.

This invention discloses a method for preparing a spatially confined copper-based catalyst for activating persulfate degradation of organic pollutants in water: (1) Dissolve nano-oxide materials and carbon sources in a solvent, stir thoroughly, centrifuge, dry, and then calcine the resulting powder at high temperature. After cooling, etch with an etching solution, centrifuge, and dry to obtain spatially confined carbon spheres; (2) Disperse the spatially confined carbon spheres obtained in step (1) with copper salt and precipitant in water, centrifuge, dry, and then calcine the resulting powder at high temperature. After cooling, the spatially confined copper-based catalyst is obtained. This invention also includes the spatially confined copper-based catalyst prepared by the above method and its application in activating persulfate degradation of organic pollutants in water. By constructing a carbon sphere-CuO heterostructure catalytic structure with spatial confinement effect, the synergistic effect of spatial confinement, interfacial electronic coupling, and active sites is fully utilized, achieving multiple synergistic regulation of pollutant enrichment, rapid electron transport, and selective activation of persulfate. Compared with traditional copper-based catalytic systems, this invention can effectively regulate the generation pathway of reactive oxygen species, significantly improve the utilization efficiency of persulfate and the selectivity of pollutant degradation, and significantly enhance the stability, anti-interference ability and recycling performance of the catalyst. It can be widely used in the deep purification of recalcitrant organic pollutants such as pesticides, antibiotics, and phenols, as well as in the treatment of complex wastewater.

The application discloses a kind of automatic adjustment methods of adhesive film baking machine roller temperature, to solve the problem of existing roller temperature regulation exists lag and deviation.The method comprises: real-time acquisition of the working condition data of roller group;Based on the working condition data, call material flow property online identification model iterative calculation melt viscosity and solidification conversion rate, generate boundary constraint condition;Synchronous simulation heat conduction, heat convection and roller surface deformation process is constructed to digital twin multi-physics field coupling simulation model, pre-computes the temperature disturbance value of future control period;Temperature disturbance value and boundary constraint condition are input into composite control model, and the temperature set value is optimized using model predictive control algorithm rolling, and the control output is generated by adaptive disturbance observer to compensate for unmodeled disturbance;According to the priority of control output, dynamically allocate bus bandwidth, and issue temperature adjustment command to heating execution unit.The application realizes the advance compensation of roller temperature field distribution deviation, reduces the adjustment lag and deviation.

The utility model relates to the technical field of cell culture, and specifically discloses an online sterile filtering device for cell culture medium, which comprises: a liquid preparation mechanism; a filtering mechanism, which comprises a first filter and a second filter, the first filter is connected to the liquid preparation mechanism through a first pipeline, the first filter is connected to the second filter through a second pipeline, the second filter is externally connected to a third pipeline, and the first filter and the second filter are provided with filter cores; the third pipeline is connected to a first reactor; a functional mechanism, which comprises a steam pipeline connected to the first pipeline; and a control mechanism connected to the liquid preparation mechanism, the first filter, the second filter and the steam pipeline. The utility model realizes complete sterility of the second filter, and overcomes the defects of pollution hazards and incomplete cleaning in the online filtering of the cell culture medium in the prior art.

The application relates to the technical field of power electronics, and discloses a multi-mode redundant power supply system based on a bidirectional inverter power board, which comprises a topological structure acquisition module, which is used for acquiring a reconfigurable circuit topological structure; an optimal structure generation module, which is used for generating an optimal topological structure according to the reconfigurable circuit topological structure and a multi-parameter real-time monitoring system; a parameter acquisition module, which is used for dynamically adjusting control parameters under different temperature conditions according to a temperature characteristic model library; a predicted state acquisition module, which is used for obtaining a predicted state of the multi-mode redundant power supply system in a future time period according to a preset digital twin model; and a predicted control module, which is used for controlling the multi-mode redundant power supply system according to the predicted state. Through the fusion of multi-stage topological structures, wide-bandgap device characteristic optimization and digital twin technology, the application realizes efficient operation in a wide load range, strong adaptability under extreme environmental conditions and high reliability in long-term operation.

The invention belongs to the technical field of pressure measurement. The dynamic pressure sensor resistant to the temperature of 850 DEG C and excellent in temperature stability comprises a closed inner cavity defined by an upper shell, a middle shell, a lower shell and a diaphragm, and a piezoelectric sensitive assembly arranged on the inner side of the diaphragm. The piezoelectric sensitive assembly comprises an upper crystal group and a lower crystal group which are composed of high-temperature piezoelectric crystals, a mass block in the middle and thermal expansion matching ceramic chips at the two ends, and is axially pre-tightened through a bolt and nut assembly. The upper and lower crystal groups are output in parallel with opposite polarities to realize active acceleration compensation; the thermal expansion matching ceramic chip is made of YBP series ceramic, so that high-temperature thermal stress is effectively relieved; all metal pieces are made of 316L stainless steel and are sealed through laser welding, internal signals penetrate through the aluminum oxide ceramic tube through the electrode plates and the nickel wires to be led to the signal output contact pin, the sensor is provided with an active acceleration compensation and thermal expansion matching structure, and high-stability and high-sensitivity dynamic pressure measurement under the high-temperature severe environment is achieved.

This application provides a reference signal transmission method and transmission apparatus. The transmission method includes: obtaining, by a network device, reference information of a terminal device, where the reference information includes at least one of an identifier of the terminal device and scheduling information of the terminal device; determining, by the network device, a transmission parameter of a phase tracking reference signal PTRS of the terminal device based on the reference information, where the transmission parameter includes at least one of a sequence of the PTRS and a frequency domain position of the PTRS; and transmitting, by the network device, the PTRS with the terminal device based on the transmission parameter. According to the reference signal transmission method and transmission apparatus provided in embodiments of this application, interference to the PTRS can be randomized.

The utility model discloses a computer case easy to assemble, which belongs to the technical field of computer cases, and comprises a case frame and a plurality of case panels, the plurality of case panels are laid on the surface of the cuboid case frame, the case frame comprises a plurality of frame rods and a plurality of triangular joints, and the triangular joints are arranged on the frame rods. Each triangular connector is arranged at the vertex angle of the case frame and connected with three frame rods, panel connecting grooves capable of being connected with a case panel are formed in the frame rods, and a fan with the position capable of being adjusted is installed on the back of the case control panel through an adjusting assembly. The computer case has the advantages that the case body portion of the computer case is composed of the frame rods, the triangular connectors and the case panel, after the panel is laid on the case frame composed of the frame rods, the panel can be connected and fixed to the top corners of the case body through the triangular connectors and is tightly connected with the frame rods, and therefore the computer case is easy to assemble and splice, and the computer case is convenient to use. And convenience is provided for convenient assembly and use of the case.