1943 results about "Transmission performance" patented technology

The invention provides a power system optimization control method and device based on power market transaction. The method comprises the following steps: acquiring real-time electricity price fluctuation data, load demand prediction data and dynamic topology connection data between power grid nodes; generating a simplified network structure adaptive to a transaction scene based on the data, and adjusting an equivalent impedance parameter of a key transmission path in real time; a node voltage amplitude and a phase angle are cooperatively regulated and controlled through a multi-stage regulation mechanism of the solid-state transformer, and a power distribution scheme is formed; monitoring operation data of the solid-state transformer in real time by utilizing an edge computing node, and generating a local control instruction by combining the current equivalent impedance parameter; and carrying out space-time mapping matching on the local instruction and the electricity price fluctuation data, generating a combined control strategy through collaborative priority ranking, and dynamically adjusting a power distribution scheme. According to the technical scheme provided by the invention, collaborative optimization of economical operation and physical transmission performance of the power system is realized.

The invention relates to a satellite-to-ground network adaptive image semantic communication method based on an NOMA technology, and the method comprises the following steps: S1, building a satellite-to-ground semantic communication frame integrated with the NOMA technology: carrying out the power superposition and serial interference elimination of different user transmission contents through the NOMA technology, a coding and decoding process is optimized through deep joint source channel coding based on hierarchical vision using a shift window; s2, establishing an adaptive semantic communication model: dynamically adjusting coding parameters based on a target bandwidth ratio and a signal-to-noise ratio of a satellite-ground channel; s3, proposing a dynamic weight adjustment algorithm: optimizing model convergence speed and transmission performance tradeoff under different channel conditions; and S4, designing a feature selection module: performing priority ranking on the image features, and selectively transmitting important features according to bandwidth resources. According to the method, the adaptive semantic communication model (ASeC-NOMA) which can be dynamically adjusted according to the target bandwidth ratio and the signal-to-noise ratio is constructed, and a large number of model storage parameters are saved while the transmission performance is ensured.

The invention provides a baseband radio frequency signal data feedback processing method based on vector modulation, and the method comprises the steps: firstly receiving a baseband signal data set transmitted by a target radio frequency link in a preset frequency band, and the baseband signal data set comprises a plurality of signal frame original modulation parameters and corresponding radio frequency feedback signal waveforms; calculating a feedback error index composed of a phase offset, an amplitude distortion factor and a spectrum leakage factor according to a radio frequency feedback signal waveform, quantifying a modulation error, carrying out time-frequency domain conjoint analysis on the feedback signal waveform, extracting an error feature vector, inputting the error feature vector into a pre-training model for cross-frame correlation learning, and carrying out the correlation learning; according to the method, a dynamic adjustment parameter sequence containing a time sequence dependency relationship is generated, and finally a closed-loop feedback control link is constructed based on the dynamic adjustment parameter sequence and original modulation parameters, so that precise processing and optimal control of baseband radio frequency signals are realized, and the signal transmission performance is effectively improved.

The invention discloses an antenna control method and device and electronic equipment, and relates to the field of multimode cooperative communication, and the method comprises the steps: analyzing the characteristics of the environment around an antenna, generating an optimal polarization strategy in combination with a characteristic analysis result and a polarization switching prediction algorithm, transmitting a test signal through an antenna array controller, and recording a channel impulse response, time inversion processing is carried out on the channel impulse response, a time inversion signal and a phase compensation parameter are combined to generate a reverse emission signal, the reverse emission signal is reemitted, an optimal polarization strategy is combined to adjust the polarization state of each array element, a beam forming parameter set is generated, and the phase and amplitude of antenna equipment are adjusted through a controller. And monitoring signal strength and transmission efficiency, and generating a signal transmission performance data report. The antenna polarization switching method and device solve the technical problems that an antenna polarization switching algorithm cannot adapt to a dynamic electromagnetic environment and a multipath effect, the stability is insufficient, the signal strength is unstable, and the communication quality is affected in the related technology.

The invention discloses a high-precision and high-reliability harmonic reducer tooth profile simulation machining design method, and belongs to the field of precision transmission. A composite cycloid flexible gear tooth profile is designed by establishing a harmonic reducer geometrical relationship model, deducing a flexible gear deformation equation, an accurate rotation angle relationship and a meshing theory based on an envelope method, and a conjugate region and a conjugate tooth profile are calculated by utilizing MATLAB. Actual deformation and theoretical deformation errors of the flexible gear are analyzed through finite element simulation, flexible gear profile parameters are optimized, an actual neutral layer curve is generated, and then a rigid gear profile is enveloped and calculated. The tooth profile design adopts a non-zero inclination angle composite cycloid, so that the meshing area is expanded by more than 30%, and the maximum stress of the flexible gear is reduced by 22.75% in combination with a linear modification method and a finite element modification method. In addition, through a multi-physical field simulation verification system (including static deformation, dynamic contact and fatigue life prediction) and a neural network optimization tooth shape parameter, the transmission performance is remarkably improved. According to the method, the torsional rigidity can be improved by 66%, and the transmission error is controlled within a high-precision range.

The invention relates to the technical field of power transmission line monitoring, and discloses a power transmission line monitoring data transmission method based on Lora and 5G hybrid networking, and the method comprises the steps: determining a network access mode through a hybrid networking selection algorithm, and generating a communication link through dual-module networking configuration; original monitoring data are processed by using a data framing compression algorithm, and a path is selected and verified through dynamic routing optimization; the modulation format is adjusted through the space-time alignment data of the multi-modal data fusion model and the adaptive modulation technology; optimizing transmission by using an abnormal data filtering algorithm and a dynamic priority scheduling program; and feedback learning mechanism evaluation performance and updating algorithm parameters. According to the invention, network adaptability, data transmission efficiency and reliability are improved, data fusion processing is optimized, adaptive optimization of transmission performance is realized, operation and maintenance cost is reduced, and safe and stable operation of a power system is guaranteed.

This application relates to the field of wireless communication, and provides a communication method and apparatus, and a system, to implement continuous data transmission, thereby improving transmission performance. The method includes: A terminal device determines an available resource set SA corresponding to N pieces of data, where SA is located in a resource selection window, N parameter sets correspond to the N pieces of data, data i corresponds to a parameter set i, N is a positive integer greater than 1, i is an integer greater than or equal to 0 and less than N, and the parameter set i includes at least one of the following parameters: a sending priority prioTX,i, a data delay budget PDBi, a frequency domain resource unit LsubCH,i, or a channel access priority class CAPCi; and sends the N pieces of data on a resource in SA.

The invention discloses a layout method of a printed circuit board, a product, equipment and a readable storage medium, and relates to the technical field of PCB design, and the method comprises the steps: carrying out the optimization decoupling and optimization separation of a position layout and a rotation angle into independent stages of sequential execution, avoiding the mutual interference of two types of decisions, greatly reducing the search space, and improving the convergence efficiency. After newly-added elements are placed every time, all the placed elements on the current board are subjected to rotation optimization, the accumulated influence of default direction deviation of early-stage elements on subsequent layout is eliminated, the optimal solution is gradually approached through multi-round iteration, the total length of a finally-arranged wire net is reduced, the signal transmission performance of the PCB is remarkably improved, and the reliability of the PCB is improved. Therefore, the problem of irreversible influence of early decision on subsequent layout is solved, and the beneficial effects of improving layout quality and optimizing PCB circuit performance are achieved.

The invention discloses a zero-copy data transmission method and device, a medium and a product, and belongs to the technical field of data transmission, and the method comprises the steps that an application program requests a memory buffer area from a kernel module; the kernel module allocates a physical memory buffer area according to the request, and returns a specially designed descriptor (including a handle corresponding to an address pointer); the application program submits a descriptor to the kernel module and requests an address pointer of the memory buffer area; after the kernel module verifies the descriptor, the physical memory buffer area is mapped to a virtual address space of the application program, and a corresponding address pointer is returned; the application program writes data needing to be sent according to the address pointer, and after writing is completed, the descriptor is submitted to the kernel module and the written data is requested to be sent; after the kernel module verifies the descriptor, a DMA controller is configured and started, and the written data is directly read from the physical memory buffer area and pushed to a network card to be sent. According to the invention, the security and certainty can be improved while the transmission performance is ensured.

The embodiment of the invention provides a method for determining optical transmission performance, the method is applied to a first device, and the method comprises the following steps: receiving an optical signal sent by a second device through an optical module, and performing photoelectric conversion on the optical signal to obtain a first electric signal; adding first noise to the first electric signal to obtain a second electric signal. And performing FEC decoding on the second electric signal to determine a first bit error rate of the second electric signal. And determining an optical transmission performance parameter in combination with a quantitative relationship between the first bit error rate and the target bit error rate. The target bit error rate is a large bit error rate, and if the first bit error rate is equal to the target bit error rate, the bit error rate of the second electric signal is degraded to the target bit error rate after the first noise is added to the first electric signal, so that the first device can determine an optical transmission performance parameter for measuring the optical transmission performance according to the first noise. Therefore, by using the scheme of the embodiment of the invention, the optical transmission performance can be determined.

The invention discloses an eBPF-based kernel optimization method, system, equipment and medium, belongs to the technical field of Linux kernel network optimization, and aims to solve the technical problem of how to improve the transmission performance for a specific data stream and specify the data stream to carry out a special routing and transmission process so as to provide services for a special network adapter and improve the transmission performance of the specific data stream. According to the technical scheme, the method comprises the steps that data packet interception is carried out on a plurality of kernel eBPF loading points and program interception points selected by a user through an eBPF kernel hook program, routing query is carried out with a routing kernel module, and selection of an operation function and routing parameters is completed; the routing kernel module completes a routing decision based on various complex routing requirements, configuration conditions, data packet conditions and environment conditions, and returns a query result to the eBPF kernel hook program, and the query result is executed by the eBPF kernel hook program. The system comprises an eBPF user mode management program module, a user mode control tool, an eBPF kernel hook program module and a routing kernel module.

The invention provides a data processing priority scheduling method for high-speed satellite communication and related equipment, which can effectively improve the transmission performance of a high-speed satellite communication system so as to adapt to differentiated requirements of various communication scenes. The method comprises the following steps: acquiring cross-layer state information; calling a strategy matrix, wherein the strategy matrix is used for defining weight coefficients of different data types under different network states and channel qualities; calculating a target priority score for the to-be-transmitted data stream according to the cross-layer state information and the strategy matrix; sequencing the target priority scores from high to low to obtain a sequencing result; scheduling transmission queues of the data streams for transmission according to a sorting result, and allocating cache transmission queues for the data streams with high priority scores; when it is monitored that the priority score of the new data stream exceeds a preset emergency threshold value, the new data stream is inserted into a cache transmission queue of the transmission queue, and back pressure control is carried out on data streams of other priorities.

The invention relates to the technical field of intelligent substations, in particular to a rapid detection system, method and equipment for a process level switch of an intelligent substation, and aims to solve the problem that existing detection only depends on network transmission performance indexes and cannot comprehensively evaluate the business function correctness and operation reliability of the switch. The system, the method and the equipment comprise a power system fault scene modeling and message generation unit, a high-precision synchronous message injection and capture unit, a multi-dimensional state association and comprehensive judgment unit and a diagnosis report generation unit. According to the scheme, comprehensive detection, high-fidelity scene and deep diagnosis are realized, and service reliability determinacy evaluation is provided.

The invention provides a network data transmission management method and system based on artificial intelligence, and the method comprises the steps: collecting network node response data through transmitting a stress probe packet carrying a dyeing mark, so as to train an artificial intelligence model which can map a data flow feature into a node transmission stress memory state; before the actual service is transmitted, the model is utilized to predict a path stress map to be triggered by the service data flow on a predetermined path. And then, the system generates a neutralization sequence packet for counteracting the stress state according to the atlas, sends the neutralization sequence packet in advance according to a multi-hop delivery strategy, actively adjusts internal processing states of all nodes on a path, and pre-optimizes a network environment for an upcoming service data flow. According to the invention, passive response is changed into active intervention, so that prospective optimization management of network transmission performance is realized.

The invention provides a 2.5 D substrate packaging method and packaging structure. The 2.5 D substrate packaging method comprises the following steps: providing a substrate with a groove; wherein the groove is a step groove; the grooves comprise a first groove and a second groove which are communicated with each other, and the depth of the first groove is greater than that of the second groove. A conductive pillar is formed in a substrate. Etching the substrate to expose the conductive pillars; forming a first insulating layer on one side, where the conductive columns are exposed, of the substrate in an ion implantation mode; the first insulating layer covers the surface of the substrate and the end face and the side wall of the exposed part of the conductive column. Grinding the first insulating layer to expose the end surface of the conductive column; forming a dielectric layer with a wiring layer on one side, far away from the substrate, of the first insulating layer; the wiring layer is electrically connected with the conductive column. The bonding force between the conductive column and the substrate can be improved, the conductive column is prevented from being broken or layered with the substrate in the grinding process, and the transmission performance of the conductive column is improved.

The invention relates to the technical field of cables, and discloses a power shielding cable stranding device for a top drive of an oil platform and a production process, the power shielding cable stranding device comprises a supporting assembly, the upper part of the supporting assembly is provided with a wire feeding assembly, a stranding assembly, a guide assembly and a traction assembly, and the wire feeding assembly is located at the side part of the upper part of the supporting assembly; the stranding assembly, the guiding assembly and the traction assembly are transversely arranged on the upper portion of the supporting assembly along the supporting assembly, the supporting assembly comprises a bottom plate, and a first driving motor is installed on the upper portion of the bottom plate. By arranging an adjusting plate, the problem that a stranded wire is locally bent due to improper storage and carrying or material rigidity difference can be solved. Precise correction is achieved by sensing local deformation of the stranded wire and applying extrusion and drawing force, the situation that the cross section structure of the cable is not uniform due to deflection of a bent part after stranding is avoided, the structural strength of the cable is guaranteed, electric energy loss is reduced, the power transmission efficiency is improved, and the structural stability and transmission performance of the stranded cable are guaranteed.

According to the automatic driving data transmission scheduling method and device, the equipment and the readable storage medium, dynamic priority weights are generated in a mode of combining reinforcement learning and a rule engine, and bandwidth demand changes, historical transmission performance and queue occupation states of all sensors can be adapted in real time; the problem that a low-priority sensor cannot acquire the bandwidth at a high load is effectively avoided, and meanwhile, efficient utilization of bandwidth resources can be realized through dynamic weight adjustment when a high-priority sensor is idle, so that the bandwidth utilization rate in a vehicle-mounted multi-sensor data transmission process is remarkably improved; the real-time performance and reliability of data transmission required by automatic driving decision making are guaranteed, and then the overall performance of an automatic driving system is improved.

The invention provides a dynamic adaptive encryption protocol selection mechanism. The mechanism comprises a network condition monitoring module, a data sensitivity evaluation module, an encryption protocol dynamic selection module and a performance feedback adjustment module. Indexes such as network bandwidth and delay are monitored in real time, and the network condition is evaluated; evaluating a sensitivity level of the data to be transmitted; dynamically selecting the most suitable encryption protocol from the encryption protocol library according to the network condition and the data sensitivity; encrypting and transmitting data by using the selected encryption protocol; and monitoring the transmission performance, and adjusting an encryption protocol selection strategy according to feedback. The method can automatically judge network and data conditions, dynamically select an encryption protocol, optimize network performance and resource utilization efficiency on the premise of ensuring data security, improve transmission efficiency and reduce calculation overhead, and has the advantages of automation, security, performance optimization, efficient resource utilization and the like; the method is suitable for the field of network communication with high requirements for safety and performance.

The invention discloses an unmanned aerial vehicle cluster authentication method based on a certificateless homomorphic network coding signature, and belongs to the field of cryptography and network security. In an unmanned aerial vehicle network system comprising a KGC, a source node, an intermediate node and an authentication server CS, the following steps are executed: the KGC generates system parameters and a master key; the source node registers to the KGC and requests part of private keys; the source node carries out vector splitting and expansion on the authentication message, randomly selects a message identifier, executes a signature algorithm to respectively calculate the signature of each vector, and sends the vectors and the signatures to the intermediate node; and the intermediate node executes a verification algorithm to judge the validity of the currently received data packet, discards the invalid data packet, calculates to obtain a signature of the combined vector, and forwards the signature to the adjacent intermediate node. When the CS obtains a sufficient number of valid data packets, the original authentication message can be recovered and an authentication success message is sent to the source node unmanned aerial vehicle. According to the invention, the transmission performance and reliability of the unmanned aerial vehicle network are improved.

The invention discloses a multi-antenna joint precoding Gbit wireless transmission system, which relates to the technical field of wireless communication and comprises a frequency spectrum channel acquisition module, a signal preprocessing module, a precoding joint optimization module, a transmission performance evaluation module and a closed-loop parameter control module. The spectrum channel acquisition module acquires signal data and evaluates a transmission bit error rate and a signal-to-noise ratio by using a spectrum analyzer; the signal preprocessing module performs denoising and normalization and constructs a channel model; the precoding joint optimization module dynamically adjusts precoding and suppresses bit error diffusion; the transmission performance evaluation module calculates a data rate and optimizes protocol design; and the closed-loop parameter control module dynamically configures system parameters to guarantee closed-loop optimization. According to the method, the transmission efficiency and the stability of a Gbit wireless transmission system are remarkably improved, a complex channel environment is effectively dealt with, the bit error rate is reduced, the data rate is improved, a transmission protocol is optimized, intelligent dynamic adjustment of system parameters is realized, and the optimal performance of a multi-antenna joint precoding technology is ensured to be exerted.

The embodiment of the invention provides a congestion control method and device, an RDMA network card and electronic equipment, and is applied to the RDMA network card of a sending end, and the method comprises the steps: responding to the received WQE, and based on the current sending rate, sending a data packet to a receiving end through an RDMA communication link; transmission performance characterization information of the RDMA communication link in a time window is determined, the transmission performance characterization information comprises the minimum round-trip time and the maximum transmission bandwidth, and the time window is set based on the determined last minimum round-trip time; updating the current sending rate based on the transmission performance characterization information; and sending the data packet to the receiving end through the RDMA communication link based on the updated current sending rate. By applying the scheme provided by the embodiment of the invention, the packet loss rate during data transmission between equipment based on the RDMA technology can be reduced.

The invention discloses a hierarchical coordinate flipping coding method, device and system based on constellation joint shaping, and the method comprises the steps: carrying out the probability shaping of an original pseudo-random binary sequence, and generating a binary sequence with non-uniform probability distribution; performing serial-parallel conversion on the binary sequence with non-uniform probability distribution, and mapping the binary sequence to a pre-generated three-dimensional constellation; the method comprises the following steps: generating four different chaotic sequences by using a secret key and a four-dimensional multiphase hyperchaotic system, encrypting subcarriers and symbols by using two of the chaotic sequences, combining the other two of the chaotic sequences into a new chaotic sequence, and performing coordinate flipping on constellation points on a three-dimensional constellation by using the new chaotic sequence to obtain a three-dimensional constellation. And completing constellation point encryption. According to the invention, the security of the communication system can be ensured, and the damage to the transmission performance can be effectively reduced.

The invention relates to the technical field of antenna control, and discloses a control method for a leaky-wave antenna and a communication device. The method comprises the following steps: measuring the dispersion characteristic of the leaky-wave antenna, establishing a second-order nonlinear mapping relation between a propagation constant and a control voltage, and obtaining a dispersion control parameter group; reversely deducing the target beam directional angle to obtain a target propagation constant, and calculating an initial voltage value of each control unit in combination with the parameter group to form a voltage gradient control sequence; correcting the propagation constant of each unit by adopting a distance compensation algorithm, and recalculating to obtain distance self-adaptive voltage distribution data; and detecting a beam quality factor in real time, updating voltage distribution data through a gradient descent algorithm when the beam quality factor deviates from a target value, and outputting a control voltage sequence to drive each control unit. The leaky-wave antenna control method and device solve the problems that in an existing leaky-wave antenna control technology, the beam quality is reduced and the data rate is sharply attenuated during long-distance transmission, and the beam control precision and the long-distance transmission performance of the leaky-wave antenna in the terahertz frequency band are improved.

The invention relates to an adapter, a connecting assembly and a ventricular assist system. The adapter comprises a shell, a circuit board and a cable assembly. The shell is provided with an accommodating cavity and two connecting ends positioned on the shell, and the two connecting ends can be connected with a connector; the circuit board is arranged in the accommodating cavity of the shell, the circuit board comprises two side plate bodies which are spaced from each other, and the two side plate bodies correspond to the two connecting ends respectively and can be electrically connected with the connectors connected to the connecting ends; the cable assembly is fixedly connected with the shell, the cable assembly comprises a connecting line, and the connecting line is electrically connected with the circuit board. The adapter has high signal transmission performance, the operation stability of the ventricular auxiliary system can be improved, and then the operation reliability of the ventricular auxiliary system is improved.

The present invention provides a flat ribbon flexible cable, the flat ribbon flexible cable having a bending surface, and a plurality of shunt channels are sequentially formed near the bending surface of the flat ribbon flexible cable; when the flat ribbon flexible cable is bent, a corresponding pre-bending section can be formed, and a pressure change occurs in the shunt channels at the pre-bending section, so that the flat ribbon flexible cable is bent along a preset direction or has a tendency to be bent along the preset direction, thereby reducing the driving force required for bending in the preset direction, avoiding affecting the motion accuracy and efficiency of the device, avoiding the phenomenon of accelerating the fatigue of the cable structure due to repeated stress concentration, causing deterioration of signal transmission performance and even the risk of fracture, and meeting the requirements of high-efficiency, reliable and long-life operation of the device.

The invention discloses a cloud edge cooperative multi-channel converged communication control method and system, belongs to the technical field of wireless communication networks, and aims to improve the high efficiency, reliability and real-time performance of multi-channel converged communication in a complex scene. The method specifically comprises the following steps: constructing a hierarchical collaborative architecture of a cloud end and an edge end; the edge end collects network state parameters of various communication channels, outputs a channel quality evaluation value based on a time sequence prediction model, and performs multi-channel data transmission through an extended communication protocol when triggering channel switching; the edge end executes network parameter configuration, flow priority scheduling and running state data acquisition operation, and the cloud end generates a soft routing optimization instruction based on running state data and issues the soft routing optimization instruction to the edge end to execute and adjust network transmission performance parameters; and monitoring the container operation state and the equipment state of the edge end in real time, when a monitoring result is matched with a preset abnormal rule, generating alarm information by the edge end, returning the alarm information to the cloud end to generate a global security policy, and issuing the global security policy to the edge end to update the preset abnormal rule.

The invention discloses a fluid internal particle motion simulation method based on CFD-DEM coupling. Comprising the following steps: constructing a three-dimensional model, and exporting the three-dimensional model as a. Step file; grid division is carried out on the solid and the grid between the solid and the drainage basin, and a. Msh file is generated; a dynamic grid motion control file is generated, and a. Model file is reserved; the. Msh file is imported into DEM simulation software, and a. Case file with the initial time being 0 is exported; and performing fluid mechanics and discrete phase calculation on the. Model file in CFD simulation software, and exporting a particle motion track and a variable change curve. According to the method, control over the moving part is more accurate, the movement trend of particles in the three-dimensional model can be accurately simulated, and particle movement simulation animation and variable data of more real points are output; the obtained simulation coupling result not only can judge the movement condition of the abrasive particles, but also can improve the structure according to a fluid mechanics (CFD) calculation result, optimize work and design parameters, reduce power loss and improve transmission performance.

The invention discloses a cache, a control chip, a debugging method and an upper computer. The cache is connected between a central processing unit and a bus, the bus is also connected with a memory, the central processing unit works at a first frequency, the bus and the memory work at a second frequency, and the first frequency is greater than the second frequency; the cache comprises at least one cache block, any one cache block is used for storing any one data block in at least one data block in the memory, the cache block and the data block are the same in size, each cache block is divided into at least two cache sub-blocks, and each cache sub-block is divided into at least two cache sub-blocks; the at least two cache sub-blocks in the cache block and the at least two data sub-blocks in the data block are in one-to-one mapping. According to the invention, the transmission performance and the power consumption between the central processing unit and the bus are balanced, and the utilization rate of the cache is improved.

The invention relates to the technical field of intelligent detection of board cards, in particular to a multichannel board card detection method and system, electronic equipment and a storage medium. The detection method comprises the following steps: inputting a standard test signal to each channel of the multi-channel board card in a normal environment, analyzing the output signal accuracy, the signal triggering time punctuality and the anti-crosstalk level of adjacent channel pairs, and judging the signal transmission performance; when the signal transmission performance is qualified, environments with different temperatures and vibration conditions are simulated, testing is repeated, performance data in the normal environment and performance data in the simulated environment are compared, and an applicable environment set is determined; and comparing with a corresponding allowed use environment set, and judging the environment adaptation performance. The anti-crosstalk capability quantitative detection and multi-environment adaptation evaluation of the multi-channel board card are realized, so that the signal independence of the multi-channel board card is ensured, the system operation stability is improved, and the reliability of the board card in a complex scene is ensured.

A broadband low-transmittance and high-absorption wave absorption and transmission integrated frequency selection surface comprises three wave absorption layers and two wave transmission layers which are sequentially stacked from top to bottom, and the three wave absorption layers are sequentially divided into an upper wave absorption layer, a middle wave absorption layer and a lower wave absorption layer from top to bottom; the two wave-transparent layers are sequentially divided into an upper wave-transparent layer and a lower wave-transparent layer from top to bottom; the multi-layer composite structure design is adopted, collaborative optimization of the wave absorbing performance and the wave transmitting performance is achieved by combining the two wave transmitting layers on the lower portion and the three wave absorbing layers on the upper portion, through organic combination of the upper layer structure and the lower layer structure, dual performance improvement of broadband wave absorbing and broadband wave transmitting is achieved, and a transition zone between a wave absorbing zone and a wave transmitting zone is greatly reduced.