The main work of this paper is done within the study of clock synchronization in the distributed system and researches mainly from three major aspects including the selected precise clock source,the algorithm of calcu...
详细信息
The main work of this paper is done within the study of clock synchronization in the distributed system and researches mainly from three major aspects including the selected precise clock source,the algorithm of calculating the clock flow,and the optimization of local clock correction algorithms. Mainly to improve and optimize the clock accuracy and stability of the algorithm, and propose a set of relatively complete distributed system theory of clock synchronization algorithms and programs. This makes the distributed system clock synchronization technology more systematic and complete. Finally, according to the similarities and differences of cloud computing and distributed systems, proposes that the distributed clock synchronization algorithm that has been optimized does apply to the cloud computing environments, and prospects the use of the distributed clock synchronization algorithm in the cloud environment.
About culture, it has a very broad definition, with its unique ideology, the value evaluation system of physical goods cannot be applied on it, which effects its currencyThis paper studied the culture from its value, ...
详细信息
ISBN:
(纸本)9781510803121
About culture, it has a very broad definition, with its unique ideology, the value evaluation system of physical goods cannot be applied on it, which effects its currencyThis paper studied the culture from its value, tried to know the distribution of culture, using AHP（Analytic Hierarchy Process）, Fuzzy Comprehensive Evaluation Method or any other methods to make sure the weights of the evaluation factorsAt last, got a reasonable value evaluation system of cultural resources, and chose one example to test if it’s right.
The secure local area networks(LAN) system based on transparence computer lacks the ability to prevent malicious attacks. Once a client being invaded, the important data maybe leaked or destroyed by malicious attacks,...
详细信息
The secure local area networks(LAN) system based on transparence computer lacks the ability to prevent malicious attacks. Once a client being invaded, the important data maybe leaked or destroyed by malicious attacks, and the servers of secure LAN system maybe attacked by Dos virus. This paper presented a framework of distributed networks intrusion prevention system(NIPS) based on deep packet inspection(DPI) to improve secure LAN's ability of preventing attacks. The request packets which matched with dynamic black-list been thrown away on clients to prevent Dos attacks, and the others which no matched with white-list and its rules been thrown away on the NIPS gateway to prevent data leak or destroy. Experiment results proved that the new approach has ability to prevent wrongful operations on server's files, and to prevent Dos attacks to server.
En terprise Application Integration systems integration technology is widely used at present and it's definitely future tendency of the development, but integration in business management and financial decision-ma...
详细信息
En terprise Application Integration systems integration technology is widely used at present and it's definitely future tendency of the development, but integration in business management and financial decision-making aspects is still in innovation and development stage. this thesis expatiate how Enterprise Application Integration system integration technology effectively achieve the seamless link of the ERP and FDSS systems also satisfactorily solve the data sharing &characteristics complementarily of enterprise resource planning management and financial decision support, the results of the application will enable enterprise performance management and business decision-making toward a new step.
The future wireless mobile communication systems are aim to provide high-quality and high-rate mobile multimedia transmission. However, hostile multipath fading and time varying of radio conditions bring about complex...
详细信息
ISBN:
(纸本)9781510803084
The future wireless mobile communication systems are aim to provide high-quality and high-rate mobile multimedia transmission. However, hostile multipath fading and time varying of radio conditions bring about complexity in channel character tracking. Orthogonal Frequency Division Multiplexing(OFDM), which is inherently resistant against inter-symbol interference(ISI), has therefore become the key technology of broadband high-speed wireless communication in future. Nevertheless, OFDM system is too vulnerable to channel estimation error. It is of great importance to estimate channel efficiently in OFDM system. And that is what this issue intended to do.
The paper describes deployment experience of a decision support system for planning fuel supplies within a network of gas stations,which is based on simulation,multi-agent and expert *** focus on various methods used ...
详细信息
ISBN:
(纸本)9781510805750
The paper describes deployment experience of a decision support system for planning fuel supplies within a network of gas stations,which is based on simulation,multi-agent and expert *** focus on various methods used in decision support system *** the system is used by logistical management and planning *** system implement such features as forecasting next day fuel sales,searching for effective fuel supply plan,planning trips for each fuel *** model estimates fuel *** is implemented in *** on the basis of logical output visual machine,based on UML diagrams and T-SQL language *** results prove effectiveness of decisions:sales volume can be increased by optimizing usage of fuel tankers.
service-oriented software system is facing a challenge to regulate itself promptly because of the evolving Internet environment and user requirements. In order to effectively control software of SOA dynamic evolution,...
详细信息
service-oriented software system is facing a challenge to regulate itself promptly because of the evolving Internet environment and user requirements. In order to effectively control software of SOA dynamic evolution, by the formal tool Workflow-net, software of SOA model which is composed of four basic structure is put forward, on the basis of which, two types of software of SOA evolution is proposed.
Vehicle logo detection(VLD) is one of the crucial parts of intelligent transportation system(ITS).VLD methods are mostly based on learning progress or the relative position of vehicle logo and license plate. However, ...
详细信息
ISBN:
(纸本)9781510818972
Vehicle logo detection(VLD) is one of the crucial parts of intelligent transportation system(ITS).VLD methods are mostly based on learning progress or the relative position of vehicle logo and license plate. However, the learning progress is time-consuming, and the relative position above limits the application of VLD, especially when the license plate is removed. In this paper, a novel VLD method, based on the features of vehicle logo using saliency detection is proposed and solved the two problems above. Three dataset containing totally 3000 images is generated to assess the accuracy of this system. A detection rate of 92.27% is finally obtained, demonstrating the robustness and efficiency of our method.
Innovation and entrepreneurship education is a teaching idea and mode adapted to the development strategy of the national economic *** on the concept and connotation of innovation and entrepreneurship education,the re...
详细信息
Innovation and entrepreneurship education is a teaching idea and mode adapted to the development strategy of the national economic *** on the concept and connotation of innovation and entrepreneurship education,the reform ideas of the teaching system of higher education were *** with the characteristics of environmental engineering specialty,the reform ideas of innovation and entrepreneurship education curriculum system of environmental engineering were studied,and will provide guidelines and references for the improvement of culture of innovation engineering talents.
Application's frequent access to some parts of a file in the distributed file system will cause hotspot *** there exist many hotspots in the system,traditional static I/O scheduling method based on round-robin or ...
详细信息
Application's frequent access to some parts of a file in the distributed file system will cause hotspot *** there exist many hotspots in the system,traditional static I/O scheduling method based on round-robin or randomized policy cannot discover and avoid the hotspots during I/O request dispatching,which will degrade the overall I/O *** this paper,we propose an I/O scheduling method based on the busy degree of I/O *** proposed method acquires and maintains the busy degree information in a hierarchical manner with low communication overhead,which could avoid the management node becoming a performance *** order to address the problem of blindness in the global distributed scheduling strategy,we design a distributed and cooperative scheduling algorithm which uses probabilistic *** test results show that the proposed method can effectively improve global I/O performance when hotspots exist in the system.
暂无评论