19results about How to "Guaranteed transfer rate" patented technology

The invention relates to the technical field of satellite loads, in particular to a working method and device of a satellite communication remote sensing fusion system, a medium and a program product. The method comprises the following steps: realizing time synchronization among components of the system through a high-precision clock and a comprehensive task management and control unit; on the basis of time synchronization, the comprehensive task management and control unit receives a user remote sensing demand sent by a satellite-ground feed communication load or a satellite-ground user communication load and analyzes the user remote sensing demand to obtain an analysis result; the comprehensive task management and control unit sends an instruction to the remote sensing camera based on an analysis result; the remote sensing camera shoots according to the instruction and sends remote sensing data to the comprehensive task management and control unit; and the comprehensive task management and control unit determines spectrum selection for data downloading according to the spectrum sensing information and downloads the remote sensing data based on the determined spectrum when a preset condition is met. The system can reduce the data volume of remote sensing data transmission while guaranteeing the timeliness and transmission rate of remote sensing information transmission.

The invention discloses a display, a driving method and device and a storage medium, and belongs to the technical field of display. The display comprises a time schedule controller and a source driver. The time schedule controller is connected with the source driver through at least two data transmission channels; the time schedule controller is used for enabling at least one of the at least two data transmission channels according to a first display parameter. According to the method, the number of enabled data transmission channels between the time schedule controller and the source driver can be dynamically adjusted.

The invention discloses a space laser communication device, and relates to the technical field of laser communication. The system comprises a protocol stack module, an Aurora Ethernet data forwarding module, a ground monitoring instruction issuing module, an RS422 serial port transceiving module, an LVDS link state reporting module, a laser link channel monitoring module, a self-adaptive rate switching module, a rate gear identification module, a sending channel and a receiving channel. The sending channel comprises a first CRC verification module, a PN code filling module, an LDPC coding module, an interleaving module and a first GTX serial-parallel conversion module. The receiving channel comprises a second CRC verification module, a PN code deletion module, an LDPC decoding module, a de-interleaving module and a second GTX serial-parallel conversion module. According to the invention, an anti-turbulence effect can be achieved in a digital domain, so that high rate and low error code of data transmission are ensured; on the premise of ensuring the transmission rate, the reliability is improved, and the performance of the optical system is improved.

The invention relates to the technical field of lithium batteries, and discloses a negative plate, a preparation method thereof and a lithium battery. The negative plate comprises a current collector and an active layer arranged on the surface of the current collector; the active layer comprises a negative electrode active material, a conductive agent, an adhesive and an additive; the additive is a metal oxide with an inverse opal structure. The metal oxide with the inverse opal structure is added into the active layer of the negative electrode plate, and the metal oxide can endow the negative electrode plate with a special pore structure, so that the porosity of the negative electrode plate is improved, the wettability of an electrolyte to the negative electrode plate is improved, and the liquid retention capacity of the negative electrode plate is improved.

The embodiment of the utility model provides an optical module comprising a circuit board, one end of which is provided with a golden finger, and the golden finger is configured to transmit an electric signal; the golden fingers comprise a first row of golden fingers which are arranged on the first surface of the circuit board and are configured to be electrically connected with the first row of metal elastic sheets; the second row of golden fingers are arranged on the second surface of the circuit board, and the second row of golden fingers are configured to be electrically connected with the second row of metal elastic sheets; the second surface and the first surface are two opposite surfaces of the circuit board, and the first row of metal elastic sheets are opposite to the second row of metal elastic sheets; the surfaces of the first row of golden fingers and the second row of golden fingers have height difference, and the distance between the first row of metal elastic sheets and the second row of metal elastic sheets is smaller than the thickness of the circuit board; a first golden finger of the first row of golden fingers is provided with a first contact; a second golden finger of the second row of golden fingers is provided with a second contact; and the first contact and the second contact are arranged in a staggered manner, so that the first elastic sheet and the second elastic sheet are staggered.

The invention discloses an encryption communication method and system based on probability shaping and double single side band modulation, and the method comprises the steps: receiving an original bit stream and an initial secret key, and generating a chaotic sequence according to the initial secret key through employing a hyperchaotic model; calculating according to the chaos sequence to obtain a mask factor; performing constellation mapping processing on the original bit stream to obtain a constellation diagram; performing rotation encryption on the constellation diagram according to the mask factor to obtain an encrypted signal; performing QPSK modulation on the encrypted signal to obtain a left sideband carrier signal; performing constellation mapping after performing repeated superposition on the initial key to obtain a key signal; probabilistic shaping and QPSK modulation are carried out on the key signal to obtain a right sideband carrier signal; superposing the left sideband carrier signal and the right sideband carrier signal to obtain a mixed signal, and sending the mixed signal to a receiver through a transmitter; and the security and reliability of key transmission are improved while the signal transmission efficiency is ensured.

The invention relates to a temporary attachment link processing method and device and electronic equipment, and the method is realized based on an asymmetric encryption algorithm, and comprises the following steps: obtaining a public key and private key pair from a key realization interface; environment variables of key and attachment link failure time are configured in background environment variables; the link request data is subjected to asymmetric encryption according to the public key, the link request data comprises a parameter of attachment link generation time, and then the link request data is put into a temporary parameter, subjected to base64 coding and then used as a link parameter to be packaged and transmitted; generating and requesting an attachment link, and performing decryption verification on link request data when the attachment link is accessed; judging whether the attachment link is an effective link within the time limit or not according to a decoding verification result, and if yes, downloading or previewing the attachment according to the attachment link; otherwise, returning corresponding link failure prompt information. Compared with the prior art, the method has the advantages that the temporary attachment link based on the attachment link generation time is realized, and the like.

The invention relates to the technical field of tinplate machining, in particular to a tinplate cold rolling device which comprises a rack. The controller is fixedly connected to the outer side wall of the rack; a flattening mechanism; an electric push rod is started to drive a lifting frame to move, the lifting frame drives an upper working roller to move when moving, a pressure sensor is pressed when the lifting frame moves, and the pressure at the moment is monitored through the pressure sensor; when the tinned plate passes through the second upper working roller, a second electric push rod is controlled under the action of the controller, the electric push rod drives the connected lifting frame to move through the output end, the lifting frame drives the connected upper working roller to move when moving, and the lifting frame presses the corresponding pressure sensor when moving; the pressure sensor is used for monitoring the pressure at the moment, and when the difference value of the two pressures is not smaller than 1500 KN, the controller controls the second electric push rod to be closed, so that the rolling force of the two leveling mechanisms is adjusted, and the uniformity and stability of the roughness of the tin plate are kept.

The utility model provides a separated MXM display card expansion structure, and aims to solve the technical problems that an MXM display card is troublesome to disassemble and assemble when being replaced according to different requirements due to the integrated design of an existing mainboard and an MXM carrier plate, and an output interface needs to be replaced at the same time when the MXM display card is replaced. The separated MXM display card expansion structure comprises a main board and an MXM carrier board which are separated from each other, an MXM display card is installed on the MXM carrier board, an SFF8654-8I connector I is arranged on the main board, an SFF8654-8I connector II is arranged on the MXM carrier board, the SFF8654-8I connector I of the main board and the SFF8654-8I connector II of the MXM carrier board are connected through a flexible flat cable, and the main board and the MXM carrier board are connected through a flexible flat cable. Wherein the connection mode is that the PCIE x8 signal is transmitted from the main board end to the MXM carrier board end through an SFF8654-8I cable.

The invention relates to a multi-time scale-based RAN (Radio Access Network) slice hierarchical wireless resource management method, which comprises the following steps of: allowing a service model 1 and a service model 2 to transmit on a resource block by utilizing an orthogonal multiple access punching mechanism and a punching mechanism consisting of a power domain non-orthogonal multiple access technology and a spatial domain non-orthogonal multiple access technology; the user of the service model 1 and the user of the service model 2 can utilize the wireless resource more efficiently or share the same wireless resource. On the basis, the invention provides a combination of a high-level control model and an optimal bottom-level control model to form a multi-time-scale wireless resource management strategy, and the strategy is also combined with deep reinforcement learning, so that the multi-time-scale wireless resource management is realized. The problem of solving a target function can be converted into a Gaussian Markov decision process by using an option-approver framework on a large time scale, and different service requirements correspond to sub-targets.

The invention belongs to the field of communication transmission, and discloses a power multimedia exchange network hybrid transmission rate optimization method and a related device, and the method comprises the steps: obtaining a to-be-transmitted data volume; solving a preset mixed transmission rate optimization model according to the to-be-transmitted data volume to obtain scheduling information of each transmission time slot of a circuit packet switching (EPS) switch and an optical circuit switching (OCS) switch of the electric power multimedia switching network; dispatching an EPS switch and an OCS switch of the power multimedia exchange network according to the dispatching information of each transmission time slot of the EPS switch and the OCS switch of the power multimedia exchange network; wherein the hybrid transmission rate optimization model is constructed in combination with a series of constraint conditions by taking maximization of the average transmission rate of all transmission time slots of the hybrid switching network as an optimization target. By using the EPS switch and the OCS switch in the hybrid switching network to the maximum extent, the problem of composite path scheduling in the hybrid switching network can be effectively solved, and the data transmission efficiency of the electric power multimedia switching network is effectively improved.

The embodiment of the invention discloses a memory management method and device, equipment and a computer storage medium, and the method comprises the steps that network equipment allocates a first memory space corresponding to a first window threshold value for a radio link control layer (RLC, Radio Link Control) entity in an acknowledgement mode; the first window threshold value is smaller than or equal to the size of a sending window of the RLC entity; when the use condition of the first memory space meets a first condition, allocating a second memory space; the first memory space and the second memory space are both used for caching related data of an RLC entity sent to a terminal by the network equipment.

The present invention discloses a cluster device software management method and device, and relates to the application field of embedded devices. The steps of the method include: step A, splitting the software package of each device into multiple sub-software packages, placing all sub-software packages in a unified format, and each sub-software package has a unique directory name; step B, creating a device software package, the directory information of the device software package includes specific device information, and each specific device information will be associated with the placement location of the required sub-software package; step C, deploying the device software package and all sub-software packages to form a download source for cluster devices to download and synchronize. The present invention not only reduces the storage requirements, but also unifies the storage form, the local storage is consistent with the server storage form, and is managed through a synchronization mechanism for easy maintenance. At the same time, the present invention also realizes that the management mode of any server is exactly the same regardless of where it is deployed, simplifying the management process.

The invention provides a droplet driving structure and a preparation method thereof, and relates to the technical field of driving structures. The liquid drop driving structure comprises a series wedge-shaped groove structure; the series wedge-shaped groove structure comprises a plurality of wedge-shaped grooves which are connected in sequence; in the driving direction of liquid drops, the narrow end of one wedge-shaped groove is connected with the wide end of the other wedge-shaped groove; the contact interface of the series wedge-shaped groove structure and the liquid drop is a wettability gradient interface, and the wettability of the contact interface of each wedge-shaped groove and the liquid drop is different, so that the liquid drop is driven to move from the narrow end of one wedge-shaped groove to the wide end of the other wedge-shaped groove. According to the invention, the potential barrier at the joint of the wedge-shaped grooves can be reduced, and continuous driving force is provided for liquid drops, so that the liquid drops move from the narrow end of one wedge-shaped groove to the wide end of the other wedge-shaped groove, the liquid drops are promoted to be better continuously transported, and long-distance continuous transportation of the liquid drops is better realized.

The invention relates to an extensible semi-physical simulation platform for a large remote sensing satellite, and the platform is characterized in that a time reference module is used for providing a unified time reference to drive the simulation platform and an on-satellite equivalent service simulator, and achieves the time alignment of the on-satellite equivalent service simulator; the comprehensive expansion and interface unit module is used for providing CAN (Controller Area Network) and SpaceWire bus interface board cards; the simulation main control unit sends a remote control instruction to the CAN bus interface board card, the CAN bus interface board card sends the remote control instruction to the on-satellite equivalent service simulator through instruction format conversion, and the on-satellite equivalent service simulator sends telemetry information to the simulation main control unit through the CAN bus interface board card after receiving the instruction; and receiving the on-satellite equivalent service simulator service data transmitted by the SpaceWire bus board card, and realizing state monitoring and service data precision analysis of the on-satellite equivalent service simulator. The ground simulation task closed-loop test and on-orbit task deduction of the remote sensing satellite are completed, various on-satellite problems are found and solved in advance, and the development efficiency of the whole satellite is effectively improved.

This invention provides a method for preparing a mixed matrix membrane for CO2 separation, including the preparation of an electrospinning precursor solution and electrospinning, the preparation of hollow ZnO nanotubes, the preparation of ZIF-8 hollow nanotubes, the preparation of a modified IL@MOF composite material, the preparation of a casting precursor solution and coating, and the preparation of a mixed matrix membrane for CO2 separation. The mixed matrix membrane for CO2 separation prepared by this invention has high permeability and high adsorption selectivity, and has high promotion and commercialization value.

The application discloses a traditional Chinese medicine crushing device for premature ovarian failure, which comprises a supporting base, a motor, a crushing component, a screening cylinder, a rolling component and an isolation cylinder.

The invention discloses a method for designing a secure transmission scheme in a rate division multiple access system, which aims at a scene that part of messages sent to users need to be kept secret among the users, only non-confidential messages are transmitted in a public stream, and the non-confidential messages and confidential messages are transmitted in a time-sharing manner in a private stream. On the premise of ensuring the confidential message transmission rate, joint optimization is carried out on precoding vector sending, rate segmentation, private stream non-confidential and confidential message transmission duration distribution and the like of each message stream, and non-confidential message transmission and rate are maximized. In the optimization problem solving process, an original optimization problem is decomposed into two layers of optimization problems, and then the decomposed optimization problems are converted and solved through binary search, slack variables, continuous convex approximation and other methods. Simulation results show that compared with comparison schemes such as rate division multiple access, time-sharing space division multiple access and the like that private streams only transmit confidential messages, the scheme provided by the invention can obtain a higher non-confidential message transmission rate.

The invention relates to a network resource allocation method for an electric power intelligent sensor relay backhaul network. The method comprises the following steps: for a sensor group formed by an S2S pair sharing the same channel, according to communication performance parameters of each sensor device in the sensor group and noise signal power of the channel, determining a signal interference noise ratio of the sensor group, and under the condition that the type of interference suffered by an interfered sensor in the sensor group is accumulated interference, determining a signal interference noise ratio of the interfered sensor in the sensor group; determining interference weights corresponding to the interfered sensors according to the signal interference noise ratios, constructing an interference hypergraph model based on the interference weights corresponding to all the interfered sensors, determining the maximum interference degree of the sensor network according to the interference hypergraph model, and determining a resource allocation scheme based on the maximum interference degree. Therefore, the network resource distribution of the power sensor is realized. By adopting the method, the optimal resource allocation scheme can be adaptively selected, and the resource allocation is effectively realized.