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7056results about How to "Improve acceleration performance" patented technology

Method and system for evaluating network safety situation

The invention relates to a method for evaluating the security situation of a network and a system thereof. The system has a two-surface three-level framework and is provided with a public service surface and a service management surface for executing uniform coordinated management on each functional module of the system; according to a service logic processing flow, the system is divided into three levels: an acquisition level, an analysis level and an exhibition level for completing four evaluating operations of assets, frangibility, threat and security situation; the invention is based on the characteristic of service operation in the network, combines the prior risk evaluation method, the prior flow and the prior security detection tool and provides a set of a novel dynamic real-time evaluation method. The system can analyze the assets and service of the network and the risk of the whole network and carries out the evaluation of the security situation. The system can provide the security state of the whole network in macroscopy, can deepen to specific service and assets and know the specific security problem, thereby effectively helping network security personnel to analyze the root of the security problem and assisting to provide a security solution proposal and implement a defense measure.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Cluster distributed type lock management method based on storage area network SAN

A distributed lock management method based on a storage area network SAN belongs to the network storage field. The distributed lock management method is characterized in that all node servers of a cluster form multiple master-slave mode sub-clusters, namely, Quorum; one node in the sub-clusters is used as the master server and the other nodes are slave servers; the multiple sub-clusters include one State Quorum and a plurality of Lock Quorums, which are respectively in charge of the management of the birth-death state of the system nodes and the management of a read-write visit lock in a name space; the State Quorum is formed by all the nodes and the Lock Quorum is formed by nodes of arbitrary number, the sizes and the structures of the State Quorum and the Lock Quorum can be flexibly configured by the client; both the State Quorum and the Lock Quorum follow the sub-cluster detection protocol, and all the nodes can select the only master server in the Quorum through the protocol to configure a normal Quorum; all the Lock Quorums respectively manages the different sections of the name space, are not overlapped and are respectively vested with different weights according to different service capacities; all the Lock Quorums independently count the load conditions, therefore when the lock management task charged by one Lock Quorum is too heavy, the load balancing process is triggered to distribute part task of the Lock Quorum to the other Lock Quorums. The invention is easy for flexible configuration and has good properties, high extensibility and high reliability.
Owner:TSINGHUA UNIV

Pump potential cavitation fault detecting method based on quick spectrum kurtosis analysis

The invention discloses a pump potential cavitation fault detecting method based on quick spectrum kurtosis analysis. The pump potential cavitation fault detecting method comprises the steps that 1, vibration acceleration signals are collected to be subject to noise reduction to serve as to-be-processed signals; 2, according to the data size of the signals, the resolving order of signal processingis determined; 3, according to the quick spectrum kurtosis algorithm computation result, the optimal carrier frequency and bandwidth are selected; 4, the selected signals within the carrier frequencyand bandwidth are subject to Fourier transformation, and a frequency spectrum envelope diagram is obtained; and 5, an original signal time domain figure, a signal time domain figure treated through quick spectrum kurtosis filtering processing and the frequency spectrum envelope diagram obtained after selected zone Fourier transformation are compared, and cavitation trouble signal time and frequency characteristics are analyzed. By means of the method, more cavitation instant signals can be detected, information in the aspects of time domain and frequency domain is seen more clearly, and the normal state and the cavitation state of a pump can be distinguished obviously.
Owner:ZHEJIANG UNIV

Interface creating method and platform based on XML document description

InactiveCN101334728AReduce complexityImprove maintainability and scalabilitySpecific program execution arrangementsDocument preparationReusability
The invention provides an interface generating method and a platform based on the description of an XML document; the method comprises the following steps: an interface generating engine searches a composed interface request mapping file; a memory address of a description document of styles is obtained and the description document of styles is searched; a style document analytic module is called so as to generate a corresponding style model tree; the interface layout is set according to the attribute of root nodes of the style model tree and is traversed in a mode of depth-first; a reflection mechanism and a script mode are adopted to generate an executing code of the event of a sound monitor of an interface control corresponding to leaf nodes of the model tree, thus generating the interface control and forming the final interface; by adopting the style model cache interface style description document, the times of document reading of the interface generating engine are reduced and the executing efficiency of the interface generating engine is improved; the interface features in the specific application background are analyzed, and a module document which reflects the requirement of the common interface is composed in advance; by introducing the module document, the reusability of the existing work is improved and the workload of a secondary development period is reduced.
Owner:BEIHANG UNIV

Flight simulation system with high instantaneity

The invention discloses a flight simulation system with high instantaneity, which is composed of two parts of a three-axis flight simulation turntable system and an external control computer system, wherein, the position and connection relation of the three-axis flight simulation turntable system and the external control computer system is as follows: the three-axis flight simulation turntable system is an actuating mechanism of a physical effect; and the external control computer system is a command sender of the physical effect; the external control computer system transmits the stimulated gesture result to the three-axis flight simulation turntable system through a reflected optical network; and the three-axis flight simulation turntable system carries out real-time gesture response. The five advantages of the flight simulation system of the invention are as follows: Matlab/Simulink is utilized to establish a stimulation model; a CPCI bus type is adopted in computer hardware, a fiber switch is utilized to build a reflection memory optical network; an interrupt response mechanism is adopted in the communication of the stimulation and the turntable system through the optical network, and AppSim stimulation software is used. The flight simulation system has practical value and wide application prospect in the technical fields of flight control and simulation.
Owner:BEIHANG UNIV

Terminal-cloud cooperative computing architecture, task scheduling device and task scheduling method

The invention discloses a terminal-cloud cooperative computing architecture, a task scheduling device and a task scheduling method. The terminal-cloud cooperative computing architecture under an edge cloud computing platform and the task scheduling method under the architecture provided in the invention aim to solve the problems that the load of the existing edge cloud platform is high and the communication overhead when a task is submitted to a remote end is high in the rapid development cloud application time. Different from the traditional cloud computing platform, the terminal-cloud cooperative computing architecture disclosed by the invention is as follows: terminals, which are safely certificated and accessed to the system and have a certain computing capability, are also added into a computing resource pool, so that a terminal cluster is formed; the terminal cluster has relatively high expansibility; the cloud expansibility is increased; the terminal cluster and a service node cluster in static cloud complete a previous task computed by a single cloud platform together; the traditional cloud platform is optimized; the load of the cloud side is effectively reduced; the architecture has the real-time and rapid characteristics of edge cloud; and furthermore, relatively high and steady services of large data applications, such as the internet of things, can be provided.
Owner:XIDIAN UNIV

Silane-modified white carbon black-carbon black composite filling and preparation method thereof

The invention discloses a silane-modified white carbon black-carbon black composite filling and a preparation method thereof. The method is characterized in comprising the following steps of: (1) adding white carbon black which is prepared by means of precipitation and white carbon black which is prepared by means of gas phase into a high-speed mixer according to the weight ratio of 3:1-3:2, slowly and evenly adding silane polysulfide in a spraying way, and gradually heating up at 100-120 DEG C to promote the surface modification reaction to be thoroughly performed; and (2) adding carbon black and mixing for 60-180min according to the weight ratio of the carbon black to the white carbon black which is prepared by means of gas phase and the white carbon black which is prepared by means of precipitation of 1:5-1:10 under the condition of continuous stirring and temperature persevering, and cooling by means of temperature reducing to obtain the silane-modified white carbon black-carbon black composite filling. The silane-modified white carbon black-carbon black composite filling which is prepared by the method improves the dispersibility of the white carbon black which is prepared by means of gas phase in rubber, reduces the charging time of a production field, obviously improves the operation environment, is used for the prescription of a tread rubber of a tire, can obviously reduce the rolling resistance of the tire, and saves the gasoline.
Owner:HUBEI HUIFU NANOMATERIAL CO LTD

City emergency evacuation simulation system based on multi intelligent agent

A city emergency evacuation simulation system based on multi intelligent agent belongs to the complex system simulation in the technical field of computerized emulation and solves the problems of single function of emergency simulation systems of all kinds and lack of intelligence of code of conduct of emergency entity. The system comprise a database module, a communication module, a parameter configuration interface module, a data management module, an intelligent agent generation module, a program execution module, a simulation module, a commanding and decision-making module and an assessment module. The database module comprises a generalized database, a knowledge base and a model base; wherein, the generalized database comprises a dangerous source subdatabase, a resource subdatabase, a foundational geodata subdatabase. The system can establish an efficient intelligent model, describes the precise behavioral process of emergent intelligent agents of all kinds in the state of disasters and emergency from two levels of macroscopy and microcosmic, can custom-make a parameter and expanded intelligent model, has commonality and expansibility, and makes up the shortage and deficiency of the city emergency evacuation simulation study in regionality and comparatively large ranges.
Owner:HUAZHONG UNIV OF SCI & TECH
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