排序方式: 共有22条查询结果,搜索用时 0 毫秒
1.
3.
讲述如何集成ISAServer2006和Windows2003Server的RRAS实现具有高可用性和高安全性的VPN。 相似文献
4.
Performance indicators play some impor-tant roles in enterprise operation. Both researchers and managers have recently pointed out that the identification of correlation between different per-formance indicators may lead to a better under-standing of business. However, it is becoming more and more difficult to measure and analyze these in-dicators since the fast growing number of perform-ance indicators and the complex relationships be-tween them. The existing categories failed to reflect these changes in an adequate way, and the quantita-tive analysis methods for identifying the characters of those performance indicators are still worthy of investigation. The main objective of this paper is to propose a practical methodology for managing and analyzing performance indicators in enterprises, which focuses on building up a performance indica-tor system and discovering the characters of those performance indicators by applying complex net-work methods. The empirical results of a telecom-munication enterprise show that the proposed meth-od can be effective in understanding the correlations between performance indicators. 相似文献
5.
无线红外PPM(脉冲位置调制)通信技术是一种新兴的通信技术.它是采用PPM调制技术,以红外线作为通信载体,可用于室内外以实现点对点及无线红外局域网通信的技术.与其他无线通信方式相比,采用红外线作为通信载体具有宽带、高速、安全性高等优点.作者从平均光功率和频带利用率两方面比较了PPM调制和OOK调制、PAM调制方式.认为PPM调制是能量利用率较高的调制方式,但它是以提高频带带宽为代价的,所以较适宜用于红外无线局域网.作者给出了PPM调制、解调一种实现方式.考虑到IEE802.建议以4-PPM或16-PPM为无线局域网的调制方式,给出了一种即能完成4-PPM又能完成16-PPM调制、解调电路的逻辑电路原理图,并对其原理进行了分析. 相似文献
6.
我厂墙纸车间自行设计制造的墙纸上胶机,生产中不仅需要自动记录纸的卷绕长度,而且需要长度自动控制。为了便于改变长度控制设定,要求长度设定和长度显示单位化,即长度设定数和显示值是单位整数。这就要求送入计数器的计数信号是量化信号。要实现这一要求,可采用微电子技术转换处理,将墙纸长度信号转化为数只脉冲,使每一只脉冲对应设定的单位整数量。这种处理结构简单、精度高、具有独到的优点。本文将介绍我厂设计制造的带电路处理功能的单位化电子计数器。 相似文献
7.
“微信们”看似高枕无忧,其实心里有苦难言:盈利模式尚不明确,竞争对手又虎视眈眈,可谓内外交困。“钱景"在哪里,已成为移动社交类应用亟待解决的首要问题。 相似文献
9.
LTE全球主流运营商及产业链发展动态 总被引:1,自引:0,他引:1
本文以全球化的发展眼光,从网络部署建设,网络发展运营和产业链的角度,对全球LTE商用情况,主流运营商发展现状与发展策略,终端发展情况进行跟踪与分析,全面阐述LTE的发展现状与未来发展前景. 相似文献
10.