一种降低末级高速缓存污染的软件控制插入策略

 现有高速缓存替换算法大多无法有效识别数据的局部性特征,导致高速缓存内即将被访问到的数据可能被未来不会被访问到的数据所替换,造成高速缓存污染问题.末级高速缓存污染引发的性能损失随着处理器和存储器之间性能差距的扩大而不断增大,成为制约系统性能提升的重要瓶颈之一.本文针对末级高速缓存污染问题,在剖视分析访存密集型程序的页一级访存行为基础上,提出一种软件控制末级高速缓存插入策略.本方法通过控制和指导页一级数据插入位置,限制局部性差的数据页在末级高速缓存中的访问空间,达到降低末级高速缓存污染的目的.实验结果表明,相对于LRU和DIP策略,本文方法能够有效降低末级高速缓存失效率,提高程序性能.     

固定/移动融合网络统一策略控制平台研究

在对比研究不同策略控制方案的基础上,提出了一种以3GPPPCC架构为基础,固定和移动网络融合的统一策略控制平台,并根据不同演进阶段和策略,分别描述了协同类型和融合类型两种统一平台的实现方式。     

Evaluation and selection of hedging policies using stochastic reservoir simulation

A hedging policy is characterized by three parameters, namely, starting water availability (SWA), ending water availability (EWA) and hedging factor (HF). The effects of these three parameters on the reservoir performance indicators have been evaluated and discussed for a southwest monsoon-dependent within-year reservoir system in southern India. For the performance evaluation, synthetically generated periodic inflow sequences from a periodic autoregressive model have been used. Quite a number of the 1800 hedging policies considered for the reservoir system, yield a better overall performance compared to the standard operating policy (SOP). Reliability, Resilience and vulnerability are found to increase with SWA for a specified EWA. On the other hand, all these performance indicators are found to decrease with EWA for a specified SWA. Hence, it is desirable to start the hedging at reasonably high SWA. All performance indicators remain practically constant at higher ranges of EWA for a given SWA. If hedging is started when there is enough water in storage, reliability, resilience and average deficit increase with degree of hedging, whereas vulnerability decreases significantly up to a hedging factor of 0.3. An interactive computer program has been developed for the selection of compromising hedging policies, and its usefulness has been discussed.     

IMS域策略与计费控制接口的平滑演进

为了提供更好的基于流的计费和策略控制,3GPP在IMSR7版本中提出策略与计费控制体系架构,其基本思路是将IMSR6版本中的策略决策功能实体和计费策略功能实体合并为R7中的策略与计费规则功能实体。本文首先简要介绍了IMSR6和IMSR7控制模型;然后重点分析了与策略控制、计费控制相关Gx接口、Rx接口的接口消息及其参数。分析表明,通过定义特定AVP,实现了IMSR6向IMSR7策略控制和计费控制接口的平滑演进。     

从初装费的变化看我国通信网发展的不同阶段

本文介绍我国电话初装费在电话网不同发展阶段的情况。文章认为,我国在解放后很长一段时间内,由于实行低初装费政策,导致企业投资过低,电信网发展缓慢。１９７９年提高初装费标准后,保证了电话网建设的１／３的资源来源。１９７９年提高初装费标准后,保证了电话网建设约／３的资金来源。从现在起,我国将逐渐下调初装费,这将进一步促进电信市场的发展,另一方面,电信网建设的融资方式也将进一步市场化。     

Technological innovations and 3G mobile phone diffusion: Lessons learned from Japan

Technology and innovation become more important determinants of corporate competitiveness, and the telecommunications sector is no exception. A good example is found in the development of the mobile phones. Technological development, embodied in innovative functions developed from the first (1G) to third generation (3G) systems, has played significantly important roles in the growth and upheavals of the Japanese mobile phone market. In addition, development in contents, value-added services which are supplied by related firms formed in the vertical structure, charging systems, handset development; all these have made this small gadget an increasingly important part of daily life.     

谈谈DWDM及SDH光传输系统设备维护

介绍了OPTIX BWS 320G骨干DWDM及SDH光传输系统设备的总体结构、原理和功能、系统维护、故障处理的基本思路与方法.     

推动我国生产性互联网服务业发展的财税政策研究

全球经济危机过后,国家出台长期发展规划强调大力发展生产性服务业与互联网服务业,实现我国产业结构转型升级与培育经济发展增长点的突破。生产性互联网服务业作为信息产业中关键领域,现已出台一系列相关财税政策扶持企业成长发展。首先梳理了现有相关财税政策的整体情况,在此基础上深入分析目前财税政策体系的具体特征与存在的主要问题,并提出促进我国生产性互联网服务业发展的财税政策建议。     

PBNM技术在网络服务中的应用

随着现代互联网技术的高速发展,多样化的网络服务使得网络设备的种类和数量与日俱增,为增强网络服务的稳定性和可靠性,提高网络的可控制能力及快速响应能力,研究策略控制管理技术在网络服务中的应用也变得十分迫切,通过对PBNM技术在网络服务中的应用研究,给出了PB．NM系统架构、网络服务应用平台的介绍、网络服务系统中的PBNM技术应用设计及其应用效果。     

促进科普产业发展的政策体系研究

论文分析了建立健全科普产业发展政策体系的迫切性,对我国现有的促进科普产业发展的政策作了较为全面系统的梳理,指出了现有政策体系存在的问题,并从法制完善、政策制定、政策措施执行等方面提出了相应的对策建议。