70results about How to "Reduce transmission cost" patented technology

The invention relates to a data center energy saving method based on a central processing unit (CPU) dynamic frequency modulation technology. The method includes two stages of initialization arrangement and dynamic management of a virtual machine. The method is different from methods in the prior art, a virtual machine arrangement technology used by energy saving of a data center is divided into the two stages of initialization arrangement and dynamic management. The initialization arrangement is applicable to the occasions of operation beginning and regular integral adjustment of the data center. The adopted method achieves the overall effect and the long-term effect due to time permission. The dynamic management is used for local management or moving facing different tasks during data center operation. The adopted method relates to local resource and ensures real-time performance.

The invention discloses an authenticated encryption method and a system, relating to the field of communication security. The restorable signature of a message and the symmetric encryption technologyare combined; a commitment value which only can be calculated by a designated message receiving end is used as a session key encryption message; and the message receiving end validates the validity ofthe message by the restorable signature, thus realizing encryption and authentication in one logical step. A key generation unit of a sending end generates a session key of the sending end; an encryption unit encrypts a message to be sent; the receiving end generates a session key of the receiving end; a decryption unit utilizes the session key of the receiving end to decrypts the encrypted message; and the authentication and confirmation message is generated according to the decrypted message, thus validating the validity of the message. When disputes occur, the message receiving end transforms the authenticated and encrypted message signature into a common signature so as to lead a third party to validate the validity of the signature. The invention has the advantages of high security,low calculated amount and transmission cost, and the like.

The invention discloses a method for calculating node similarity of a chart in a distributing manner and belongs to the field of computer data mining. The method comprises the following steps: a distributed calculating platform is built by adopting a master / slave mode, object data is read by a master computer, a graph model is built and sent to slave computers, tasks are divided by the master computer, slave tasks are assigned to the slave computers, the slave computers calculate task nodes and send the calculating results to the similarity incremental calculation values of the node pairs of the graph model respectively, the master computer calculates a deviation ratio and sends the calculating results to corresponding slave computers, the slave computers amend the similarity incremental calculation values of the nodes of local tasks, sum the similarity incremental calculation values and send the calculating results to the master computer, the master computer integrates the similarities of the nodes of the graph model to obtain the similarity of the nodes of the graph model finally. According to the invention, compared with the traditional SimRank calculating method, the transmission cost is low, the calculating time is short, and the efficiency is obviously improved.

The invention provides an equipment fault three-level bidirectional early warning method and system based on edge computing, and the method comprises the steps: building a first-level bidirectional data sensing prediction model based on an adaptive exponential smoothing algorithm, predicting the data of a collection node, carrying out preliminary screening of a fault signal, uploading the fault signal, and reducing the cost of normal signal transmission; a second-stage bidirectional data perception prediction model of an autoregressive moving average algorithm based on extended Kalman filtering is constructed, and is used for further confirming the accuracy of a fault signal, reducing the false alarm rate and reducing the communication cost between a side end and a cloud end; creating a third-stage bidirectional data perception prediction model based on LSTM and BP neural network combination so that strong computing power is achieved based on edge equipment, he accuracy of data is enhanced, underlying requirements are timely responded, thus reducing time delay of cloud layer transmission. According to the invention, bandwidth and time delay consumed in a data acoustic wave communication transmission process are greatly reduced, and early warning is effectively carried out on a fault signal.

The invention discloses a compressed-sensing-based de-artifact fusion method of a high-dynamic-range image. Compressed sampling is carried out on an inputted multi-exposure image sequence; reconstruction is carried out by using a reconstruction method to obtain multi-exposure image sequence after compressed sensing; and then an image set after compressed sensing is normalized, multi-exposure imagede-artifact fusion based on PatchMatch and a rank minimization algorithm is carried out on the image set to obtain a high-dynamic-range (HDR) image of a target. According to the invention, on the basis of latest research results of K-SVD dictionary learning, compressed sensing and de-artifact fusion, the sampling rate, the storage space and the computational complexity are reduced effectively; and a de-artifact de-blurring HDR image is obtained.

The invention discloses a two-level policy decision-based access control method and a two-level policy decision-based access control system, and belongs to the field of access control in information safety. In the method, a local policy decision point (PDP) is deployed at a policy enforcement point (PEP) end, and the local PDP makes a decision for an access request according to a local policy cache, and if the local PDP cannot determine that the decision is a deterministic decision, a central PDP finally finishes the decision according to a system policy library. The system comprises a policydecision server, an attribute publishing point and a plurality of resource servers, wherein a policy enforcement point (PEP) and a local policy decision point (PDP) are deployed on each resource server; and a central policy decision point (PDP) is deployed on the policy decision server. The invention has a good dynamically adjusted elastic system framework, fully utilizes the computing resources of the PEP end, lightens the burden of the central PDP, reduces the network transmission overhead and effectively improves the access control efficiency at extremely low policy update cost.

The invention discloses a link selection method for data scheduling of a P2P video living transmission system, which comprises the steps that: the data request nodes registers to a login server, and the login server distributes neighbor nodes to the request nodes; the request nodes establish connections with the distributed neighbor nodes, and the neighbor nodes are graded into different levels according to the link-cost; the request nodes acquire the request data from the neighbor nodes according to the different levels of the neighbor nodes and based on the information of data content and data transmitting performance. In the same data scheduling order, the method can make better use of network resources, thereby remarkably reducing the flux of going through NAT and the flux of stepping over autonomous system and backbone network of internet service providers.

The invention discloses a method for designing a compression imaging system based on a coded aperture lens array. The compression imaging system comprises a field stop array, a coded aperture template array, a sub-aperture splicing lens array, a coded sampling template array and a detector image surface array, wherein the field stop array partitions a large scene; the coded aperture template array performs spatial light modulation on rays from a scene target; the modulated rays are converged by the sub-aperture splicing lens array; the converged rays are spatially sampled by the coded sampling template array which is positioned at the front end of a focal plane; and the detector image surface array is used for compression imaging. The compression imaging system based on the coded aperture lens array can synchronously compress and sample the target scene, the sampling frequency of an image signal and data storage and transmission cost can be greatly reduced, a storage space required by a measurement matrix can be greatly reduced by partitioning and imaging the large scene through the sub-aperture splicing lens array, and the calibration working amount of an optical system is greatly reduced.

The present invention relates to a multi-network coverage apparatus and a multi-network coverage method having a network selection function. The multi-network coverage apparatus comprises a core processing module, a wireless communication module and an energy supply module; wherein the core processing module is used for controlling the multi-network coverage apparatus to achieve self-organized networking with other network apparatuses, and selecting a corresponding communication mode for performing data transmission according to attributes of data to be transmitted when there is data needing to be transmitted after the networking; the wireless communication module is used for providing a plurality of wireless communication modes for the core processing module to select during networking and data transmission; and the energy supply module is used for providing energy supply for the multi-network coverage apparatus. The multi-network coverage apparatus and the multi-network coverage method of the present invention improve a survival capability, an expansion capability and reliability of a network in a complex environment, reduce the number of various apparatuses in the network, facilitate management of the network, and reduce investment cost of the apparatuses.

The invention, which relates to the technical field of image compression, discloses a color image compression method. An RGB color image is converted into a YCbCr image in a 4-to-4-to-4 format by an image color space conversion method; changing, quantification, sorting, and coding are carried out on a brightness Y component and chrominance Cb component and Cr components in the YCbCr image; and then the compressed RGB color image is synthesized again. On the premise that the encoding rate is controlled effectively, the quantization error of the YCbCr image is adjusted by processing the brightness Y component and chrominance Cb component and Cr components, thereby reducing the encoding distortion of the RGB image and guaranteeing the optimal quality of the RGB image after compression; and the encoding rate of directional quantification processing is low, the storage space is small, and the transmission cost is low.

The invention discloses a network coding based weak security multicast transmission topology construction method facing integer transmission rates. The method includes the following steps: parametersof the network can be obtained; the network is expressed as a digraph, the digraph consists of nodes and edges, the nodes include source nodes, intermediate nodes and destination nodes, if a communication link exists between two nodes, an edge is connected between the two nodes in the communication link direction, the capacity of each directed edge is equal to the capacity of the corresponding communication link, and the cost of each directed edge is equal to the cost of the corresponding communication link; a mathematical model of the network coding based weak security multicast transmissiontopology of the integer transmission rates can be built according to the digraph; solving can be performed by adopting an integer linear programming solution; and a network coding based weak securitymulticast transmission topology construction plan of the integer transmission rates can be obtained. The construction of transmission topology can be achieved under the condition that the network coding based weak security multicast of the integer transmission rates meets weak security needs, secure transmission throughput in network can be reached to maximum, and at the same time, minimum transmission cost at the maximum throughput can be guaranteed, and efficiency and cost optimization of the network can be achieved.

The invention discloses a distributed speech enhancement method based on distributed uniformity and MVDR (minimum variance distortionless response) beam forming. The distributed speech enhancement method includes S1, generating coordinates of sensor network nodes according to an improved random acoustic sensor network generation algorithm, and calculating connection matrixes, degrees and adjacent node collections of the nodes; S2, receiving noise-containing speech signals by a sensor network generated in the S1, performing MVDR preprocessing on the noise-containing speech signals received by the nodes to acquire a speech preprocessing matrix (0) and a noise preprocessing matrix (0); S3, performing distributed uniformity iteration according to the connection matrixes, the degrees and the adjacent node collections, which are acquired in the S1, of the nodes and the speech preprocessing matrix (0) and the noise preprocessing matrix (0) which are acquired in the S2 to enable the nodes to acquire uniform speech signals zi(t) of an MVDR speech enhancement time domain.

The invention relates to a file recovery system. The system comprises a BM-SC and a via network element, wherein, the system is also provided with a file recovery node which is connected with the via network element which controls the file recovery node, and the file recovery node is used for storing corresponding data block in dialog information forwarded by the via network element for realizing file recovery; the via network element which controls the file recovery node also comprises a calculation module which is used for calculating the usable resource information of the file recovery nodes and a report module which is connected with the calculation module and used for reporting the status information of the file recovery node to the BM-SC; the BM-SC also comprises a distribution module which is used for generating the list of the file recovery node. The invention also relates to a file recovery method which comprises the steps of distributing dialog information and the file recovery node list by the BM-SC, storing the corresponding data block by the file recovery node and requesting file recovery from a terminal. The file recovery system reduces communication traffic when data is distributed and downloaded to the file recovery node and avoids the overload of the file recovery node.

The invention discloses a multi-keyword searchable encryption method and system supporting a Boolean access control strategy, and the method comprises the steps of firstly enabling a trusted authorityto generate a system public key, a main key and an IlGamal private key, carrying out the cloud disclosure of the system public key, and transmitting the private key to a data user; then enabling thedata owner to generate an index ciphertext and a data ciphertext for the document and upload the index ciphertext and the data ciphertext to the cloud; uploading the attribute set and the query keyword predicate of the data user to a credible authority to verify whether the identity of the user is legal or not during data user retrieval, and generating a retrieval token and sending the retrieval token to the data user if the identity of the user is legal; enabling the data user to receive the retrieval token and upload the retrieval token to the cloud; after receiving the token, enabling the cloud server to check whether each index ciphertext is matched with the retrieval token or not by using a system public key, and send the matched data ciphertext to a data user; and enabling the data user to recover the data ciphertext into plaintext content by using the private key. According to the invention, fine-grained Boolean access control, Brillouin keyword search and constant-level systemkey length can be realized.

The invention discloses a dynamic mining method for distributed data streaming, which comprises the following steps of: S1, by each local node, collecting current data blocks at a current t moment andcarrying out micro cluster processing; S2, by each local node, carrying out incremental micro cluster updating of a local mode; S3, executing a local mode transmission stage, i.e., uploading the local mode of each local node at the t moment to a central node; S4, by the central node, after receiving the local modes of all the local nodes at the t moment, reconstructing a global sample data set onthe basis of a micro cluster; and S5, by the central node, executing a basic learner for new learning on the basis of the global sample data set, and carrying out incremental updating of a global mode in a current state on the basic learner for new learning. According to the invention, in a local mining mode, data can be processed locally to the greatest extent, so as to reduce the probability that the data is discarded.

The invention belongs to the crossing field of image information security and digital image signal processing, and discloses a line art picture hiding and recovering method and equipment, and a storage medium. A blindage image is converted into a multi-order halftone image, secret information is subjected to multiple backups, a secret information embedding position is positioned according to a user secret key, the secret information and blindage pixels are coded in combination with the thickness of a line graph, and a secret-containing line graph is generated. The secret information is decodedaccording to the key, and the accuracy of secret information recovery is improved through a secret information recovery strategy based on multiple backups. Compared with the existing method, the method according to the invention is advantageous in that the hiding and recovering process strictly depends on a user secret key, the certain attack tolerance capacity and recovering capacity are achieved, the secret embedding capacity is high, the transmission cost is low, the generated secret embedding shelter is a special carrier, an original shelter is not transmitted in a channel, detection of asecret analyzer based on natural image statistical characteristics can be resisted, and high safety is achieved.

The invention discloses a multi-sensor multi-frame joint detection algorithm based on posteriori information fusion. The method comprises steps that S1, system parameters are initialized, including the number M of sensors included in a system, the size Nx*Ny of a sensor echo data plane and the number K of algorithm joint processing cycles, and a variable k=1 is initialized; S2, echo data is received; S3, local posteriori probability density function calculation is performed; S4, a posterior probability density function represents approximate calculation of parameters; S5, information transmission is performed; S6, global posteriori probability density calculation is performed; and S7, target track estimation is performed. The algorithm is advantaged in that advantages of both multi-sensorinformation fusion technology and the multi-frame joint detection technology can be performed, detection and tracking performance of the algorithm for weak targets is further improved, transmission cost of the algorithm is reduced through Gaussian mixture approximation, algorithm implementation efficiency is improved while algorithm performance is guaranteed, and the algorithm can be widely applied to the networking radar, MIMO radar, array sonar and other fields.

The invention discloses a task unloading method for location privacy protection. The method comprises the following steps: S1, generating an annular virtual position space by taking a real position of a user as a circle center, and selecting a virtual position according to an initial random probability; S2, acquiring a position of a base station deployed with an edge server nearby by using the virtual position, and constructing a server selection matrix; S3, according to the server selection matrix, preferentially selecting a server to send a task unloading request; S4, allocating bandwidth, and calculating related parameters of task processing; and S5, selecting a task which can be processed within task tolerance time, saves the most energy and time and has the maximum income and unloading the task to an edge node to be executed. According to the method, a task is unloaded by considering the location privacy problem of a user, the location privacy of the user can be effectively protected, the service quality can be obtained as much as possible, a task unloading decision is made by using a reinforcement learning algorithm, and an unloading strategy is dynamically adjusted through online learning.

The invention belongs to the field of data identification, particularly relates to a distributed language relationship identification method, system and device based on federated learning, and aims tosolve the problem that a plurality of participants are difficult to perform joint modeling on the basis of not sharing data. The method comprises the steps that each local platform obtains to-be-recognized data and local training data with labels, a local classifier model is trained according to the local training data, the trained classifier models are integrated into a global classifier model,the local classifier model is initialized through the global classifier model, and to-be-identified data is identified by using the initialized local classification model to obtain a language relationship prediction result. According to the method, the local platform is combined with other platforms to perform data use and machine learning modeling on the basis of not sharing data, so that the training collaboration of the natural language recognition model is improved, the problem of data islands is solved, and the total amount and requirements of training data required for training the modelby each platform are reduced.

The invention relates to a compressed sensing compensation method based on an edge extraction and image fusion technology. The compressed sensing compensation method based on an edge extraction and image fusion technology comprises the following steps: at a sending end, inputting an original image I to be transmitted, extracting in advance an edge feature of the original image I in two stages, and obtaining a sparse matrix BW1 containing edge information of the original image; executing space-domain random sampling on the original image I by adopting a compressed sensing measurement method, and obtaining a low-dimensional projection matrix BW2 of the original image; integrating element information in the sparse matrix BW1 containing edge information of the original image and in the low-dimensional projection matrix BW2 of the original image, and transmitting the integrated element information; at a receiving end, executing edge decoding on transmission data, and reconstructing the low-dimensional projection matrix of the original image; executing registration on two images obtained, executing fusion on them by using a space-domain fusion principle, and outputting a final result BW3. The compressed sensing compensation method based on an edge extraction and image fusion technology has the advantages of the lower transmission cost and better ability of noise resistance.

The invention discloses a ship network routing algorithm based on social familiarity, and particularly relates to the technical field of data transmission of marine ship ad hoc networks. The defect that existing research is not based on real ship trajectory data, most simulators are adopted to simulate the motion of ships, and only simple route simulation can be achieved is overcome. According tothe ship network routing algorithm based on the social familiarity, the social relation between ships is calculated according to historical navigation information of the ships, so that a ship social network is constructed, and the next hop selection of routing is guided according to the encountering probability between the ships reflected in the ship social network information. The algorithm mainly comprises the following steps that: firstly, ships upload historical and real-time navigation information to the Internet of ships to generate a ship social network formed by social familiarity among the ships; secondly, the probability of meeting between ships is calculated according to the ship social network graph; and finally, the ship with the highest meeting probability with the target ship in the nearby ships is selected as the next hop.

The invention discloses a method using information loaded by Mpeg II video stream to establish a reliable transmission channel. A loader and an unloader are respectively arranged in a centralized control type simulcast system architecture, and the technical scheme utilized by the method is as follows: (1) constituting scattered bits obtained during a video loading process into a bit stream; (2) designing a protocol data unit on the basis of the bit stream; and (3) establishing a transport protocol to realize a reliable and stable transport channel through data unit synchronization and various error control. The invention has the advantages that the transmission channel can cover and transmit to areas capable of being covered by satellite signals along with television signals and satellites, which has wide obtained coverage, small transmission cost and good synchronization, thus facilitating a center emitting signals to centrally control the subsystems to load important information and realizing the control on far simulcast subsystems within the coverage area of satellite signals.