本文针对电子商务以及网络通信过程中的安全问题,提出了SSL协议(安全套接层协议),为探究SSL协议的工作过程,在Windows sever 2003上搭建了SSL安全协议模型配置了安全证书并进行了抓包分析,研究表明,SSL协议为网络安全通信及电子商务交...本文针对电子商务以及网络通信过程中的安全问题,提出了SSL协议(安全套接层协议),为探究SSL协议的工作过程,在Windows sever 2003上搭建了SSL安全协议模型配置了安全证书并进行了抓包分析,研究表明,SSL协议为网络安全通信及电子商务交易提供了安全保障,是一种较为可靠的安全通信协议,对电子商务及网络通信的发展起到了促进作用。展开更多
Wireless sensor nodes have the advantage of being low-cost,easily deployed and of good mobility.If deployed in an underground mine with existing underground transmission systems a wireless sensor network can improve t...Wireless sensor nodes have the advantage of being low-cost,easily deployed and of good mobility.If deployed in an underground mine with existing underground transmission systems a wireless sensor network can improve the collection of information.To get good transmission performance for 2.4 GHz wireless sensor nodes at the working face we calculated the reflection properties of electromagnetic waves from a flat metal plate.Using the cascade impedance method(CIM),we studied transmission attenuation and compared the results to actual tests.The results show that the effective transmission distance of 2.4 GHz wireless sensor nodes meets the stipulations of the ZigBee protocol.展开更多
To solve the issue of downloading speed and application scenarios limitation of current JTAGLink debugger, this paper presents a new scheme of ARM debugger with the feature of Ethemet interface implemented by pure har...To solve the issue of downloading speed and application scenarios limitation of current JTAGLink debugger, this paper presents a new scheme of ARM debugger with the feature of Ethemet interface implemented by pure hardware logic design. This paper outlines the principle of the scheme, blocks of logic design, and protocols design. The scheme provides higher downloading speed, wider flexibility on application, and improves work efficiency evidently. Key words： JTAGLink Debugger; Ethernet; FPGA; Logic Design展开更多
Based on the methods of acquaintance cache and group-based intelligent forwarding of service recommendations,a novel group-based active service(GAS) protocol for migrating workflows was proposed.This protocol did not ...Based on the methods of acquaintance cache and group-based intelligent forwarding of service recommendations,a novel group-based active service(GAS) protocol for migrating workflows was proposed.This protocol did not require service requesters to discover services or resources.The semantic acquaintance knowledge representation was exploited to describe service groups and this semantic information was used to recommend service to respective clients.The experimental results show that the new protocol proposed offers better performance than other protocols in terms of first-response-time,success-scope and ratio of success-packet-number to total-packet-number.When the number of service request packet is 20,the first-response-time of GAS protocol is only 5.1 s,which is significantly lower than that of other protocols.The success-scope of GAS protocol is 49.1%,showing that GAS protocol can effectively improve the reliability of mobile transactions.And the ratio of success-packet-number to total-packet-number of GAS protocol is up to 0.080,which is obviously higher than that of other protocols.展开更多
文摘本文针对电子商务以及网络通信过程中的安全问题,提出了SSL协议(安全套接层协议),为探究SSL协议的工作过程,在Windows sever 2003上搭建了SSL安全协议模型配置了安全证书并进行了抓包分析,研究表明,SSL协议为网络安全通信及电子商务交易提供了安全保障,是一种较为可靠的安全通信协议,对电子商务及网络通信的发展起到了促进作用。
基金Project 60774090 supported by the National Natural Science Foundation of China
文摘Wireless sensor nodes have the advantage of being low-cost,easily deployed and of good mobility.If deployed in an underground mine with existing underground transmission systems a wireless sensor network can improve the collection of information.To get good transmission performance for 2.4 GHz wireless sensor nodes at the working face we calculated the reflection properties of electromagnetic waves from a flat metal plate.Using the cascade impedance method(CIM),we studied transmission attenuation and compared the results to actual tests.The results show that the effective transmission distance of 2.4 GHz wireless sensor nodes meets the stipulations of the ZigBee protocol.
文摘To solve the issue of downloading speed and application scenarios limitation of current JTAGLink debugger, this paper presents a new scheme of ARM debugger with the feature of Ethemet interface implemented by pure hardware logic design. This paper outlines the principle of the scheme, blocks of logic design, and protocols design. The scheme provides higher downloading speed, wider flexibility on application, and improves work efficiency evidently. Key words： JTAGLink Debugger; Ethernet; FPGA; Logic Design
基金Project(60573169) supported by the National Natural Science Foundation of China
文摘Based on the methods of acquaintance cache and group-based intelligent forwarding of service recommendations,a novel group-based active service(GAS) protocol for migrating workflows was proposed.This protocol did not require service requesters to discover services or resources.The semantic acquaintance knowledge representation was exploited to describe service groups and this semantic information was used to recommend service to respective clients.The experimental results show that the new protocol proposed offers better performance than other protocols in terms of first-response-time,success-scope and ratio of success-packet-number to total-packet-number.When the number of service request packet is 20,the first-response-time of GAS protocol is only 5.1 s,which is significantly lower than that of other protocols.The success-scope of GAS protocol is 49.1%,showing that GAS protocol can effectively improve the reliability of mobile transactions.And the ratio of success-packet-number to total-packet-number of GAS protocol is up to 0.080,which is obviously higher than that of other protocols.
