795 results about "Transmission performance" patented technology

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 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 relates to the technical field of coal mine automation control, and discloses a coal flow windscreen wiper multi-device cooperative control method and system. The method comprises the following steps: obtaining an original environment data set of each sensor node in an underground environment, processing the original environment data set to obtain a communication quality index, calculating bandwidth demand change of each node in combination with historical transmission records of the nodes, and predicting a resource allocation proportion; when the current available network resources cannot meet the requirements, sorting the key data packets to obtain a priority transmission sequence; extracting high-priority data from the sequence, temporarily storing the high-priority data to a local cache unit, and determining the state of a buffer area; dynamically adjusting bandwidth allocation by adopting an intelligent optimization model, and updating communication resource configuration; and judging whether the resource configuration meets a load balance requirement, if so, sending a data packet through a wireless channel, determining a transmission performance index, and generating a resource management scheme of a next period. The cooperative work efficiency of multiple devices of the coal flow windscreen wiper in the high-dust and high-humidity environment is improved.

The invention discloses a rectangular waveguide sealing window structure for realizing broadband transmission, which belongs to a microwave signal detection device and comprises a first rectangular waveguide cavity, a second rectangular waveguide cavity and a rectangular dielectric block arranged between the first rectangular waveguide cavity and the second rectangular waveguide cavity, the first rectangular waveguide cavity comprises a first rectangular waveguide shell and two first stepped transition structures embedded into an inner cavity of the first rectangular waveguide cavity, and the second rectangular waveguide cavity comprises a second rectangular waveguide shell and two second stepped transition structures embedded into the second rectangular waveguide shell. The opposite side faces of the two first stepped transition structures and the two second stepped transition structures are provided with identical tooth-shaped steps, the second rectangular waveguide shell is further internally provided with an installation cavity communicated with the second I-shaped sliding groove, the two waveguide cavities are connected through screws, and the rectangular dielectric block is fixedly installed in the installation cavity. The vertically symmetrical multi-stage stepped impedance matching network provided by the invention realizes excellent transmission performance with low voltage standing-wave ratio in a wide frequency band, and is suitable for a millimeter wave system with high power and wide frequency band.

The invention discloses a cross-domain information distribution method and system for multi-link cooperative networking, and relates to the technical field of network communication, and the method applied to an information sending end comprises the following steps: obtaining a link quality prediction result of each data transmission link based on the computing power level of an information receiving end and the link quality prediction result of each data transmission link; and dynamically selecting a main transmission path and at least one backup path of cross-domain information from all data transmission links. And based on the link quality of the main transmission path, performing fragmentation processing and coding processing on the to-be-distributed data to obtain a plurality of to-be-distributed data packets. And transmitting the to-be-distributed data packet to an information receiving end through the main transmission path and the backup path, so that the information receiving end decodes and recombines the to-be-distributed data packet. According to the method, the stability, the real-time performance and the resource utilization efficiency of cross-domain information distribution for multi-link cooperative networking are effectively improved, and the transmission performance of cross-domain data transmission is remarkably improved.

The invention discloses an emergency communication system and method, and belongs to the field of emergency communication. The emergency communication method comprises the following steps of: acquiring a link performance parameter of a satellite communication link associated with an adjacent station node; based on the state information and the satellite communication link state of the local station node, executing at least one of the following scheduling operations on the service data: determining a first transmission performance index for transmitting data through the satellite communication link of the local station node, determining a first transmission performance index of a composite path from a wireless ad hoc network to the adjacent station node based on the state information, determining a second transmission performance index of a composite path from the wireless ad hoc network to the adjacent station node and transmitting data through a satellite communication link of the adjacent station node based on the state information, and selecting a forwarding path according to a comparison result of the first transmission performance index and the second transmission performance index; or, when the flow of the data to be transmitted meets the preset bandwidth aggregation condition, dividing the data to be transmitted into the first data part and the second data part.

The invention discloses a packaging structure, a packaging method and an electronic component, and relates to the technical field of semiconductors, and the packaging structure comprises a first chip, a second chip, a first electric connection part, a second electric connection part and a rewiring layer. Through the superposition cross layout of the first chip and the second chip, while the integration level is ensured, the wiring space is expanded by using the radial distribution of the non-overlapping area, and the coverage connection of the re-wiring layer is matched, so that the high-density interconnection is realized, and the parasitic inductance and parasitic capacitance are reduced; meanwhile, the signal transmission path is shortened through the combination of the cross layout and the rewiring layer, and the parasitic inductance and the parasitic capacitance are further reduced; besides, paths of different signals can be physically isolated through independent distribution of the non-overlapping areas, parasitic inductance and parasitic capacitance are further reduced, signal delay, reflection and coupling interference are reduced, and the problem of poor signal transmission performance caused by wiring limitation in traditional packaging is effectively solved.

The invention provides a return difference measuring method and device of a gear transmission mechanism in a motor driving system. According to the return difference measurement method, the return difference measurement value is indirectly determined by identifying the critical point that the gear transmission mechanism starts to respond to the driving signal, the critical point marks that the gear transmission mechanism completes the change from the idle stroke state to the effective transmission state, and the return difference measurement value is calculated based on the position data before the critical point. The return difference measurement value is a comprehensive index which contains the comprehensive influence of the gear backlash, the elastic deformation of the transmission shaft and the static friction force and reflects the overall transmission performance of the system, so that the return difference measurement value which reflects the overall transmission performance of the system and is real and comprehensive is obtained through measurement according to the technical scheme of the invention. According to the method, the transmission lag characteristic of the system under the actual working condition can be represented more accurately, and a more reliable data basis is provided for subsequent high-precision motion control.

The invention discloses a smart city-oriented multi-modal data transmission optimization method. The method comprises the following steps of collecting and preprocessing multi-modal original data generated in a city; performing joint feature extraction by using an improved CorrNet network and outputting an importance label; collecting operation data and carrying out regular analysis on the urban network to generate network state information; the multi-modal features, the importance labels and the network state information are associated and analyzed, and a coding control instruction is generated; performing differential compression and coding processing on the multi-modal data to generate a to-be-transmitted data queue; path calculation and resource allocation analysis are carried out, and a scheduling control instruction is generated and implemented through a tabu search method; and generating and uploading a transmission performance evaluation result based on the feedback index and the network state information. According to the method, multi-modal feature extraction, differential coding and intelligent scheduling technologies are fused, efficient and reliable transmission of urban data is realized, and the method has the advantages of high accuracy, controllable time delay and high resource utilization rate.

The invention discloses a special inspection device and method for the performance of a reactor core measurement cable, and the device comprises a detection box which is internally provided with a cable which can be connected with transmission detection equipment and is of a J-shaped structure; the method comprises the following steps: S1, installing a cable in a detection box, opening environment endowing equipment, and providing a high-temperature, high-pressure and high-radiation independent environment or composite environment for the cable in the detection box; according to the invention, the equipment simulates a reactor core composite environment by setting an environment, applies bending, torsion and tensile / compressive stress to the cable in cooperation with the mechanical strength detection structure, detects the mechanical strength dynamic characteristics of the cable in the composite environment, and detects the transmission performance of the cable in combination with the transmission detection equipment. The performance of the reactor core measuring cable can be comprehensively and truly detected, the reliability and the residual service life of the cable can be more accurately evaluated, and a reliable basis is provided for quality control and use of the reactor core measuring cable.

The embodiment of the invention provides a wafer-level chip packaging structure and electronic equipment, relates to the field of semiconductors, and aims to improve the transmission performance between chips. The wafer-level chip packaging structure comprises an adapter plate and a wafer-level chip. The adapter plate comprises a first rewiring layer and a second rewiring layer which are arranged in a stacked mode, the first rewiring layer comprises an optical interconnection channel, and the second rewiring layer comprises an electric interconnection channel. The wafer level chip is arranged on the adapter plate. The wafer level chip includes a plurality of device regions, each device region including at least one chip. Along a first direction parallel to the adapter plate, the chips in the two adjacent device regions are connected through an electric interconnection channel, and the chips in the two device regions at the two ends are connected through an optical interconnection channel. Along a second direction parallel to the adapter plate, the chips in the two adjacent device regions are connected through an electric interconnection channel, the chips in the two device regions at the two ends are connected through an optical interconnection channel, and the first direction and the second direction are crossed.

The invention relates to a hollow-core anti-resonance optical fiber with a polygonal supporting structure, which comprises an outer cladding and an inner cladding, the inner cladding is composed of anti-resonance structure units, the anti-resonance structure units are arranged at intervals along the circumferential direction of the inner wall of the outer cladding and are connected with the inner wall of the outer cladding, a fiber core is formed by a central cavity coated by the inner cladding, and the fiber core is connected with the inner cladding. The anti-resonance structure unit comprises at least two layers of anti-resonance tubes including an outer anti-resonance tube and at least one inner anti-resonance tube, and is characterized in that at least one polygonal supporting piece is arranged at the joint of the outer anti-resonance tube and the inner anti-resonance tube and the joint of the inner anti-resonance tubes and is used for adjusting the distance and the orientation between the anti-resonance structure unit and the fiber core. By adjusting and limiting the radial occupied distance of the polygonal supporting piece, the interval between the inner anti-resonance tube and the outer anti-resonance tube can reach a better interval, the hollow-core optical fiber keeps good structural characteristics after being drawn, and therefore the transmission performance of the hollow-core optical fiber is improved and optimized.

A ribbon fiber optic cable, comprising a cable core, a water blocking layer (4), a steel tape (5) and an outer jacket (6) which are sequentially arranged from inside to outside. The cable core comprises a flexible foamed subunit (1) and tight-buffered subunits. Each tight-buffered subunit comprises a TPU loose tube (2) and optical fiber ribbons (3). A gap is formed between the water blocking layer (4) and the steel tape (5). By using the TPU loose tubes (2), due to a tight-buffered thin-wall structure, the tight-buffered subunits have a small size, thereby increasing the space utilization of optical fibers in the loose tubes and the fiber packing density of optical fibers in the fiber optic cable, and achieving a large core diameter ratio. The cable core uses the flexible foamed subunit (1), and when the tight-buffered subunits and the flexible foamed subunit (1) are stranded, the flexible foamed subunit (1) made of a soft material provides protection for the tight-buffered subunits when the fiber optic cable is in use, thereby ensuring the transmission performance of the fiber optic cable. A gap is formed between the water blocking layer (4) and the steel tape (5), so that there is certain spacing inside the fiber optic cable, and a loose structure is achieved, reducing the impact of outer jacket shrinkage of the fiber optic cable on the TPU loose tube (2) and the optical fiber ribbons (3), and solving the problem of additional fiber attenuation during loose coiling and thermal cycling of the fiber optic cable.

The invention relates to a method for predicting nutation transmission time-varying meshing thermal stiffness of a double-arc spiral bevel gear, which comprises the following steps of: setting convective heat transfer coefficients of a gear meshing surface, a non-meshing surface and a gear end surface in an interaction module according to boundary conditions, and applying surface heat flow in a load module according to an obtained meshing area, so as to predict the nutation transmission time-varying meshing thermal stiffness of the double-arc spiral bevel gear. A heat transfer DC3D8R grid is selected as a grid type, and according to a boundary formula, a temperature field during meshing of the double-arc spiral bevel gear is finally calculated; in a Model of ABAQUS software structure simulation, a load module applies a predefined temperature field, a temperature field odb file is loaded into the Model, and structure simulation is carried out; according to the method, temperature field distribution and meshing characteristics can be combined, the time-varying meshing thermal stiffness of the nutation transmission double-arc spiral bevel gear can be accurately predicted, a theoretical basis can be provided for transmission performance evaluation and service life prediction of a gear pair, and important engineering value is provided for design and optimization of a high-performance gear transmission system.

The utility model relates to the field of moxibustion instruments, in particular to a self-control thread moxibustion device which is characterized by comprising a positioning frame, a rotating power output mechanism, a rotating rod, a pull rod and a moxa stick bracket, the rotating power output mechanism is arranged on the positioning frame, and one end of the rotating rod is fixedly connected with a power output shaft of the rotating power output mechanism; the moxa stick bracket can be arranged on the positioning frame in a horizontal sliding mode, the two ends of the pull rod are hinged to the other end of the rotating rod and the moxa stick bracket respectively, and the rotating power output mechanism can drive the moxa stick bracket to horizontally slide on the positioning frame in a reciprocating mode through the rotating rod and the pull rod. The power transmission structure is not prone to abrasion, aging and deformation affecting transmission performance after being used for a long time, and therefore it can be guaranteed that power transmission keeps high accuracy and stability for a long time, and then it can be guaranteed that moxibustion keeps high quality for a long time; and the components of the automatic-control first-line moxibustion device do not need to be disassembled and maintained frequently, so that the trouble of a user can be solved.

A double-lane millimeter wave vehicle networking safety transmission method, system, device and medium based on STAR-RIS, the method comprising: constructing a STAR-RIS assisted double-lane millimeter wave vehicle networking communication scene; based on the propagation characteristics of millimeter wave signals, combining the channel fading characteristics under the conditions of line-of-sight and non-line-of-sight transmission and the transmission and reflection functions of STAR-RIS, calculating the channel gain of the cascaded channel of the STAR-RIS assisted link; based on the random geometry theory, respectively calculating the probability density functions of the associated distances of the direct link, the STAR-RIS reflection link and the STAR-RIS transmission link; constructing a dynamic link association strategy supporting ternary selection; establishing a signal-to-interference-and-noise ratio model under three association modes; combining the physical layer security performance index definition, calculating the closed-form analytical expressions of the connection interruption probability and the secrecy interruption probability, and verifying the security gain of STAR-RIS; the present application has the advantages of effectively overcoming the half-space coverage blind area of the traditional reflective RIS, and improving the link connection reliability and physical layer safety transmission performance under the double-lane complex shielding environment.

The application relates to an optical signal transmission device. The optical signal transmission device comprises an optical emission module, an optical fiber connection module and an optical receiving module; the optical emission module is integrated on a silicon optical chip; the optical emission module comprises a modulator and a plurality of lasers; the modulator couples received electrical signals and optical signals emitted by the lasers; the modulated optical signals are sent to the optical fiber connection module; the optical fiber connection module sends the modulated optical signals to the optical receiving module; and the optical receiving module outputs to-be-recovered electrical signals based on the modulated optical signals. The optical signal transmission device can save chip manufacturing costs, realize high-bandwidth transmission, and balance transmission performance and costs.

The invention relates to an auxiliary information reporting method and system, a terminal and a computer readable storage medium. The auxiliary information reporting method comprises the steps that auxiliary information is reported to network side equipment based on a control element MAC-CE of a media access control layer, the auxiliary information is used for reference of uplink waveform switching of the network side equipment, and the auxiliary information comprises power related information. The terminal disclosed by the invention can report the terminal auxiliary information to the network in real time, so that the network equipment correctly schedules the waveform of the PUSCH, thereby ensuring the uplink transmission performance and improving the network coverage capability.

The invention relates to the field of omnidirectional radiation, and discloses a high-gain omnidirectional radiation metasurface device which comprises a supporting ball and a feed source antenna, the feed source antenna is located in the geometric center of the supporting ball, the feed source antenna is an omnidirectional radiation antenna, the supporting ball is of a godberg polyhedral structure, and a plurality of metasurface units are arranged on the supporting ball. Each metasurface unit is arranged on one hexagonal surface of the supporting ball; determining the aperture phase of each metasurface unit according to the position of each metasurface unit, and selecting the metasurface unit corresponding to the transmission phase according to the aperture phase of each unit; the feed source antenna radiates electromagnetic waves to the metasurface unit, and the metasurface unit is used for changing the amplitude and phase of the electromagnetic waves, so that transmission waves are focused on a horizontal plane, and horizontal omnidirectional high-gain radiation is realized. Compared with a traditional horizontal omnidirectional array, the feed structure is simple. Compared with a horizontal omnidirectional cylindrical conformal metasurface, the problem that the transmission performance of the edge units is deteriorated due to oblique incidence is solved.

The application discloses a cryptographic algorithm debugging data hierarchical grouping compression method for a reconfigurable cryptographic chip. In the debugging work of the reconfigurable cryptographic chip, the debugging data is divided into reconfigurable cryptographic algorithm configuration information and operation intermediate data. The debugging data is processed by hierarchical grouping, the debugging data of each level module is divided into one or more groups, then the debugging data is filled or spliced, and then the reconfigurable debugging data is compressed by using a Huffman coding mode. After the hierarchical grouping compression method of the debugging data is used, the transmission performance of the debugging data can be effectively improved while the storage resource of the debugging data is reduced.

This application provides a data transmission method and system based on satellite communication. The key technical points include: Step S1: Obtaining the terminal location range based on the terminal device's location data; Step S2: Obtaining candidate satellites based on the satellite coverage range of the transmitting satellite and the terminal location range; Step S3: Obtaining the transmission distance trajectory between the candidate satellite and the terminal device, and the transmission trajectory coefficient of the candidate satellite; Step S4: Obtaining the transmission performance coefficient of the candidate satellite based on the performance requirements parameters of the terminal device and the network performance parameters of the candidate satellite; Step S5: Obtaining the comprehensive transmission coefficient of the candidate satellite based on the transmission trajectory weight and transmission trajectory coefficient, and the transmission performance weight and transmission performance coefficient; Step S6: Obtaining the target transmitting satellite for the terminal device based on the comprehensive transmission coefficient, and transmitting the terminal device's transmission content data based on the target transmitting satellite. This application improves the data transmission efficiency of terminal devices based on satellite communication.

The invention provides an electronic stand-alone service life analysis method and related equipment, and the analysis method comprises the following steps: obtaining a to-be-analyzed electronic stand-alone, and determining a plurality of functional circuit units in the to-be-analyzed electronic stand-alone; determining at least one target functional circuit unit in the plurality of functional circuit units; obtaining a basic parameter of the target functional circuit unit, and obtaining a degradation time sequence parameter of the target functional circuit unit degraded along with time; determining the service life of the to-be-analyzed electronic single machine based on the basic parameter and the degradation time sequence parameter of the at least one target functional circuit unit; wherein the basic parameter and the degradation time sequence parameter are both used for representing the signal transmission performance of the functional circuit unit. The electronic stand-alone service life analysis method is accurate and rapid in electronic stand-alone service life analysis and effectively meets the requirement for rapid evaluation of the service life of the electronic stand-alone in the development stage.

The invention discloses a symbiotic radio system design and optimization method based on multiple active intelligent reflection surfaces. According to the method, high-efficiency backscatter communication is realized while the performance of the main transmission system is enhanced by using the intelligent reflection surface. A plurality of active intelligent reflecting surfaces are configured in the system, the main transmission performance is enhanced, and meanwhile, the active intelligent reflecting surfaces serve as backscattering equipment in turn, and transmission of secondary information is achieved by conducting scattering modulation on incident main signals. The method aims at maximizing the main transmission rate of the system, and jointly optimizes the base station sending power, the active beam forming vector and the reflection coefficient of the intelligent reflection surface. An original non-convex optimization problem is decomposed into a plurality of sub-problems, semi-definite relaxation, continuous convex approximation and other methods are adopted for conversion, and finally an optimal solution is obtained through iterative solution. Compared with a scheme based on a passive intelligent reflection surface and an active intelligent reflection surface scheme based on phase random, a higher main transmission rate can be realized under the condition of ensuring the same secondary symbol signal to interference plus noise ratio.

The invention provides a communication performance monitoring method and device, electronic equipment, a chip and a storage medium, and relates to the field of communication, and the method comprises the steps: determining at least one monitoring time slot for transmitting a to-be-monitored target communication service according to the timeout time associated with the to-be-monitored target communication service; in the monitoring time slot, performing monitoring and performance statistics on the AXI transaction associated with the target communication service transmitted on the AXI bus to be monitored to obtain an actual statistical result of the monitoring time slot; wherein the actual statistical result is used for indicating the transmission performance of the target communication service. Therefore, fine-grained and service-aware performance analysis with the communication slot as granularity can be realized, the target communication service and the AXI bus behavior can be accurately associated, and whether the target communication service is transmitted in the specified slot or not can be effectively judged, so that the actual transmission performance of the target communication service is truly reflected, and a reliable basis is provided for system scheduling optimization and QoS (Quality of Service) guarantee.

The present application relates to the technical field of electronic devices, and particularly relates to an electric connector, which comprises an insulating body, two rows of terminals, a plurality of inner shielding sheets and two outer shielding sheets; the insulating body is provided with two side walls and a butt joint groove between the side walls; the terminal comprises a main body, an elastic arm and a pin, and the elastic arm is provided with a contact part protruding into the butt joint groove; each row of terminals comprises a plurality of signal terminal pairs and two ground terminals on both sides of each signal terminal pair; each inner shielding sheet is integrally connected with the two ground terminals on both sides of the corresponding signal terminal pair and is located at the inner side of one row of terminals; each outer shielding sheet is located at the outer side of one row of terminals and contacts the ground terminal. In the present application, each signal terminal pair is located between the inner shielding sheet and the outer shielding sheet, which can effectively reduce the interference of internal and external noise on the signal terminal pair, and the inner and outer shielding sheets are both electrically connected with the ground terminal, so that multiple common grounds are achieved, the resonance effect is effectively improved, and the high-frequency high-speed signal transmission performance is improved.

This utility model provides a positioning device for improving the transmission accuracy of a torque converter assembly, belonging to the field of mechanical engineering technology. It includes a mounting mechanism and a mounting component. The mounting component has a chassis and a mounting groove formed on the chassis. The torque converter assembly is detachably mounted in the mounting groove. The positioning mechanism includes a drive component and a limiting component. This utility model, through improved structural design of the positioning device, effectively solves the problems of low positioning accuracy, unstable clamping, and easy damage to the workpiece surface in traditional torque converter assembly positioning methods. It adopts a flexible protection mechanism combining an elastic contact surface and a buffer pad layer, which not only improves clamping stability but also reduces the risk of wear on the torque converter assembly surface. Simultaneously, by using a knob to drive the limiting component, it achieves simultaneous improvement in operational convenience and positioning accuracy, effectively ensuring the transmission performance and service life of the torque converter assembly and meeting the needs of high-precision assembly and efficient production.

The utility model discloses a head-swinging wiring mechanism, which comprises a rotary tank chain, a rotary shaft, a rotary shaft pipeline, a partition plate and a fixed seat, the movable end of the rotating tank chain is fixedly mounted on the rotating shaft, and the fixed end of the rotating tank chain is fixedly mounted on the fixed seat; the rotating shaft drives the movable end of the rotating tank chain to do + / -180-degree circumferential rotation when doing circular motion; the rotating shaft pipeline enters the rotating tank chain after being fixed at the movable end of the rotating tank chain, is led out from the fixed end of the rotating tank chain and is fixed, and the rotating shaft pipeline is driven to rotate simultaneously when the rotating tank chain rotates; and the partition plate is mounted on the fixed seat. The rotary tank chain wiring structure of the swinging head wiring mechanism is simple, a pipeline is free of friction in the moving process, the problem of pipeline abrasion is greatly solved, the failure rate is reduced, and it is ensured that the stable connection and transmission performance of the wire can be kept in the swinging head moving process.

The invention discloses a high-speed communication cable and a preparation method thereof. The cable comprises an inner core conductor, an insulation unit, a shielding layer and an outer protection layer. Each inner core conductor is formed by twisting one or more silver-plated copper alloy wires, the number of the inner core conductors is at least two, and the adjacent inner core conductors are arranged in parallel; each insulation unit comprises an insulation layer wrapping the outer side of each inner core conductor and an inner sheath wrapping the outer side of the insulation layer. The shielding layer wraps the outer side of the inner sheath, and the shielding layer is an aluminum foil mylar layer. And the outer protection layers are wound and coated on the outer side of the shielding layer, and the two outer protection layers are simultaneously wound in opposite directions. On the basis of realizing the small size of the cable, the high-speed transmission performance is ensured, the flexibility is high, and the cable can be conveniently bent and used in narrow spaces such as the interior of an automobile and a cabinet.

The invention discloses a welding spot testing method and system and a computer program product, and relates to the technical field of electronic packaging, and the method comprises the steps: constructing a single welding spot testing architecture through a to-be-tested single welding spot of a chip unit, and determining a transmission parameter matrix according to a scattering parameter matrix of the single welding spot testing architecture; combined de-embedding calculation is carried out by combining a substrate open circuit transmission matrix, a substrate short circuit transmission matrix and a chip short circuit transmission matrix which are measured when the single welding spot test framework is in an open circuit structure and a short circuit structure, so that the parasitic effect of the test substrate and the chip unit and the crosstalk of adjacent structures are accurately stripped; therefore, transmission performance parameters which only reflect intrinsic characteristics of the to-be-tested single welding spot can be directly extracted, signal superposition interference and approximate estimation limitation existing in a traditional multi-point series connection test or parameter equalization method are broken through, systematic errors are eliminated, accurate measurement and fault location of electrical characteristics of the to-be-tested single welding spot are achieved, and the method is suitable for large-scale popularization and application. And the accuracy and the reliability of the welding spot test in the packaging body are obviously improved.

This disclosure relates to the field of wireless communication technology, and in particular to a mobility handover method, apparatus, electronic device, and computer program product. The method includes: sending a first message to a terminal device, wherein the first message instructs the terminal device to perform a state or function transition, the terminal device being in an energy-saving state or having an energy-saving function enabled. This disclosure proposes to perform state transitions in advance for terminal devices in an energy-saving state or with energy-saving functions enabled, thereby reducing transmission performance losses due to mobility; and to provide advance configuration for the terminal device, enabling the terminal device to remain in and / or switch to an energy-saving state, achieving mobility handover between the terminal device and / or the network under deep energy-saving conditions through low-power signal interaction.