数字化变电站设计简述

文章介绍了桂林500 kV变电站柳桂乙线数字化间隔,对IEC 61850协议、智能开关、电子式互感器、数字式计量系统进行了分析,阐述了现阶段500kV数字化变电站的实施方案,分析了数字化变电站技术与常规变电站设计的区别,论述了建设该数字化变电站的先进性、安全性、可靠性,并指出了数字化变电站建设是变电站未来发展的必然趋势.     

SIP与H．323协议互通研究

在SIP网络出现之前,以IP网络为传输系统的H．323网络已得到广泛应用,因此,应用SIP网络时必须考虑SIP网络和H．323网络的互联问题。文章研究SIP网络与H．323网络互通的功能实体IWF（互通的功能实体称为IWF,即Inter Working Function互通功能体）,经测试此方案是合理可行的。     

SPECTRUM LICENSING AND FLEXIBLE BEAUTY CONTEST DESIGNS

McMillan's (1995) ‘flexibility’ proposition suggests a testable hypothesis about beauty contests spectrum assignments. Such flexibility purportedly allows regulators to pursue social welfare (network deployment) goals. A separate argument is that more competitive beauty contests enhance the probability of assignment. The study concludes that regulators do indeed focus on societal (network deployment) welfare goals. Initially, consideration is given in the immediate term where licenses are awarded based on operator aftermarket commitments. Subsequently, spectrum package attributes and financial performance obligations, specified in the tender documents, come into play to support the networks spread more widely through the population in a timely manner. Finally, the econometric results suggest that more competitive beauty contests enhance the probability of assignment.     

基于VMI的中低压配网物资协议库存采购模式研究

协议库存采购是国家电网公司为提高中低压配电工程物资供应的时效性对配网的部分物资实行协议库存采购货物招标的一种新的采购模式。为提高供应商的准时供货率,保障物资供应,在供应商管理库存（VMI）的基础上,将电网企业的物资采购与库存方式相结合,提出了VMI协议库存采购模式及具体的实施方式。     

Regulator flexibility and the administrative allocation licensing of 3G spectrum

Globally, most nations assign radio spectrum to provide 3G mobile services during the period 1999–2007. While there is consensus among most economists that auctions are the preferred assignment mechanism, the assignment mode is split, more or less, equally (in terms of the number of licences issued) between administrative allocations and auctions. With auction procedures tending to raise more revenue for governments (Cartelier, 2003) the question that naturally arises is: why are administrative allocations so popular a method to assign spectrum? McMillan (1995) conjectures that administrative allocations provide additional ‘flexibility’. Accordingly, this study examines the performance of 3G assignments in terms of an econometric analysis of a unique sample of national 3G spectrum administrative allocations. These outcomes are modelled as depending on spectrum package attributes, and post-award network deployment requirements.     

A cost-benefit analysis of the random assignment UK Employment Retention and Advancement Demonstration

This article presents a cost-benefit analysis of Britain’s Employment Retention and Advancement (ERA) demonstration, which was evaluated through the first large-scale randomized control trial in the UK. ERA used a combination of job coaching and financial incentives in attempting to help long-term unemployed men and low-income lone parents sustain employment and progress in work once they were employed. Using both administrative and survey data, ERA’s effects on benefits and costs were estimated through impact analyses, which exploited the experimental design. The findings indicated that ERA was cost beneficial for long-term unemployed adult men, but not for lone parents. The key findings appear robust to sensitivity tests. Uncertainty, as implied by the SEs of the estimated impacts, was addressed through a Monte Carlo analysis, an approach seldom previously used in cost-benefit analyses of social programs.     

Asterix Category 021协议的应用与分析

介绍了Asterix Category 021协议的数据项内容、用户应用程序框架（UAP）的结构、 报文数据块的布局,以及ADS-B系统应用该协议的方式,分析了该协议的实例应用和协议报 文 的解析,提出了处理报文的思路。研究与分析结果可为如何使用Asterix Category 021协议 生成与解析报文提供参考。     

基于航空公司飞机滑行油耗均衡原则的机场停机位分配算法

机位是机场的重要资源,高效、合理的分配机位是机场运行的一个重要环节,也是机场地面作业的一个重要任务。本文建立了以各航空公司飞机滑行耗油均衡的目标机位分配策略,并采用遗传算法进行求解。数据结果证明了模型的和算法的有效性,表明该分配策略具有一定的理论价值和实际意义。     

高速公路声音中央设备监控系统的设计与实现

某高速公路交通管制系统中设有声音中央设备,此设备具有周期性的从交通管制基干网接收其他设备事件信号、向声音应答设备提供文章等功能。声音中央设备的监控系统通过用户界面,可以实时的监视和方便的控制声音中央设备。监控系统通过使用网络Socket通信技术,实现在局域网之内进行高速数据通信;通过通信协议的设计,实现了数据交换的可靠性,异常恢复的快速性;通过双重热备份系统的设计,保证了系统的可用性和健壮性。     

福建省重点实验室发展研究

基础研究是科技进步的先导,是自主创新的源泉。重点实验室是基础研究的重要力量。本文从福建省重点实验室基本情况出发,对目前重点实验室发展进行综述分析;研究福建省重点实验室发展的思路与目标,在此基础上,分析重点实验室发展的主要任务,最后提出相关的对策建议。