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185results about How to "Reduce the number of requests" patented technology

Hybrid encrypted network data security method and system

The invention relates to a hybrid encrypted network data security method and system. The method comprises the steps that an RSA secret key pair is generated by a client terminal, request data are encrypted by utilizing a private key and the private key is stored, and the encrypted request data together with a public key are transmitted to a server; a cryptograph formed by the server via utilizing the generated AES secret key to encrypt returning data and a cryptograph formed via utilizing the public key to encrypt the AES secret key are received; the returning data are data obtained by the server via utilizing the public key to decrypt and perform the encrypted request data; and the client terminal utilizes the stored private key to decrypt the received cryptograph formed by encrypting the AES secret key via the public key so as to obtain the AES secret key, and the received cryptograph formed by encrypting the returning data via the AES secret key is decrypted by the AES secret key so that the returning data are obtained. A hybrid encryption mode of symmetric encryption and asymmetric encryption is adopted so that secret key leakage or decryption can be prevented, and network transmission data encryption can be increased. The client terminal controls the asymmetric secret key so that the number of requests can be reduced and efficiency can be enhanced.
Owner:GUANGDONG XIAOTIANCAI TECH CO LTD

Method and device for loading webpage in browser

The embodiment of the invention provides a method and a device for loading a webpage in a browser. The method comprises the following steps of parsing a webpage requested to be downloaded by the browser to obtain the DOM (document object model) tree structure data information of the webpage; acquiring a text of a webpage element of a specified type from the DOM tree structure data information, wherein the text of the webpage element comprises a source address; requesting the downloading of contents of the webpage element of the specified type to a specified-type webpage element storage server corresponding to the browser according to the source address of the webpage element of the specified type; when the webpage is rendered and loaded, performing rendering by using the webpage element of the specified type downloaded from the specified-type webpage element storage server, and loading the webpage element of the specified type in the webpage. According to the embodiment of the invention, paths for requesting for downloading to a webpage server are reduced, the network switching capacity is reduced, bandwidth resources are effectively saved, the downloading time of the webpage element is reduced, and the loading speed of the webpage is further increased.
Owner:北京鸿享技术服务有限公司

Method for partial combination clutter suppression in airborne MIMO radar three-dimensional beam space

The invention belongs to the technical field of radar signal processing, relates to localized suppression processing of radar clutters and discloses a method for partial combination clutter suppression in airborne MIMO radar three-dimensional beam space. The method comprises the steps that firstly, an expression of a space-time data vector x is obtained and a space-time two-dimensional guide vector of a target is established; secondly, an array element-pulse domain of the space-time data vector x is converted into a three-dimensional beam domain through three-dimensional discrete Fourier transform; thirdly, a space-time data vector z generated after dimensionality reduction and a space-time two-dimensional guide vector, generated after dimensionality reduction, of the target are obtained; fourthly, according to a cost function of dimensionality reduction space-time self-adaptive processing, a weight vector of a dimensionality reduction processor is calculated; fifthly, space-time data processed by clutter suppression are obtained through the weight vector of the dimensionality reduction processor. The method can solve the problems of the large operand and large sample requirements and is applied to the scene of radar clutter processing.
Owner:XIDIAN UNIV

DASH (Dynamic Adaptive Streaming over HTTP) streaming media live broadcast system and method based on proxy server

The invention provides a DASH (Dynamic Adaptive Streaming over HTTP) streaming media live broadcast system and method based on a proxy server. The system comprises a DASH server, the proxy server and a client, wherein the proxy server is used for requesting video fragments from the DASH server, storing the video fragments, adding a code rate significance table, and combining video requests of the client; the client is used for sending a video fragmenting request to the proxy server; and the client selects the video fragments by using a code rate switching method in order to efficiently utilize and cache a current bandwidth. A novel network topology mode based on the proxy server is designed; a code stream switching method of the DASH live broadcast system adapting to the current bandwidth is provided for the client; and a dynamical caching method is provided at a proxy server end. Through adoption of the DASH streaming media live broadcast system and method, the problem that code streams are switched frequently in the DASH live broadcast system is solved, and load pressure of a network is lowered, so that the QoE (Quality of Experience) performance and network performance of a DASH protocol in a live broadcast environment application are improved.
Owner:SHANGHAI JIAO TONG UNIV

Bistatic radar multichannel combination dimension reduction clutter suppression method based on MIMO

The invention discloses a bistatic radar multichannel combination dimension reduction clutter suppression method based on MIMO. By using a current bistatic MIMO radar distance dependence clutter suppression method, an operation amount is large and the number of needed independent identically distributed samples is high. By using the method of the invention, the above problems are mainly solved. Realization steps are characterized in that (1) a transmitted waveform is used to carry out matched filtering on echo data of the radar; (2) a multichannel combination dimension reduction matrix is constructed and dimension reduction processing is performed on the received data; (3) the data after the dimension reduction is used to estimate a clutter covariance matrix; (4) according to a space-time adaptive processing principle, an optimal weight vector is obtained; (5) the optimal weight is used to weight the data after the dimension reduction, the background clutter is suppressed and a target signal is detected. Compared to an existing full-dimension processing method, by using the method of the invention, there are the advantages that a computation complexity is low; a requirement to the number of the independent identically distributed samples is low and clutter suppression performance is good. The method can be used in bistatic radar ground target detection of the MIMO.
Owner:XIDIAN UNIV

Environment-adaptive device-free target positioning method

The invention discloses an environment-adaptive device-free target positioning method. The environment-adaptive device-free target positioning method includes the steps that a positioning system is established, and the value of strength of a received signal of a receiving end in a link formed between every two wireless communication nodes is obtained; a positioning area is divided into N lattice points, and a sparse positioning model is constructed according to the influence of occurrence of a target at a certain lattice point on the value of strength of the received signal of the receiving end in each link; the weight of influence of changes of the strength of the signal at each lattice point on the value of strength of the received signal of the receiving end in the corresponding link is determined according to an elliptical shadow model to obtain an ideal dictionary; the ideal dictionary is updated and sparsely restored alternately according to changes of the value of strength of the received signal of the receiving end in each link; the position of the lattice point corresponding to a non-zero value in updated sparse vectors is the position of a positioned device-free target. Through the environment-adaptive device-free target positioning method, online dynamic dictionary adjustment and sparse restoration can be performed according to changes for adapting to the environment, changes of the environment can be adapted to dynamically, misjudgment of a target is effectively avoided, and positioning precision is effectively improved.
Owner:智邮开源通信研究院(北京)有限公司

Grading treatment method and system based on Lucene fragmentation structure

InactiveCN103455619AThe sorting effect is reasonableSolve the disadvantages of inconsistent idfSpecial data processing applicationsRelevant informationUser input
The invention discloses a grading treatment method and system based on a Lucene fragmentation structure. The method comprises the following steps: performing data splitting on an index file to form index file fragmentation data, and distributing the index file fragmentation data on various fragmentation processors, so as to complete initialization operation; receiving query information input by users through a searching processor, and performing word segmentation treatment on the query information to form searching lexical items; looking up in a global information buffer according to the searching lexical items in sequence to judge whether the information related to a current searching lexical item exists or not; if the information related to a current searching lexical item does not exist, directly sending the searching item to the fragmentation processors to be treated; if the information related to a current searching lexical item exists, acquiring the global information of the searching lexical item from the global information buffer by the searching processor, and then sending the searching lexical item to the fragmentation processors to be treated. According to the invention, the global information is treated through multiple requests to enable various fragmentation to share the global information, so that the problem that the computed scores of one lexical item in different fragmentation are different is solved, and the sequence of searching results is more reasonable.
Owner:FOCUS TECH
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