Design of a 6.25 Gbps backplane SerDes with adaptive decision feedback equalization

A 6.25 Gbps SerDes core used in the high speed backplane communication receiver has been designedbased on the OIF-CEI-02.0 standard. To counteract the serious Inter-Symbol-Interference (ISI),the core employed a half-rate four-tap decision feedback equalizer (DFE). The equalizer used the Sign-signleast mean-squared (SS-LMS) algorithm to realize the coefficient adaptation. An automatic gain control(AGC) amplifier with the sign least mean-squared (S-LMS) algorithm has been used to compensatethe transmissio...     

半P集合(X~■,X)与■-导航数据的路径匹配

在海上台风预警搜救系统中,存在数据丢失现象,为了能够正确地、实时地显示船舶在电子海图上的当前位置,应用半P-集合,提出■-导航数据与■-匹配度概念,给出辨识■-导航数据的定理、■-导航数据的恢复定理、导航数据的稳态匹配度定理、导航数据在电子海图路径上的匹配准则,最后给出■-导航数据在电子海图上的路径匹配应用。     

An adaptive handoff management for fault tolerant mobile computing

<正> Due to the mobility of mobile hosts,checkpoints and message logs of the computing process may disperseover different mobile support stations in the checkpointing and rollback recovery protocol for mobilecomputing.Three existing checkpoint handoff schemes do not give well consideration to the efficiency offailure-free process execution and the recovery speed of the failure process at the same time.A dynamicadaptive handoff management of the checkpointing and rollback recovery protocol for mobile computing isproposed in this paper.According to the individual feature and current state of each mobile host,differentimplementations are selected dynamically to complete the handoff process upon the handoff event.Performance analyses show that the proposed handoff management incurs a low loss of performance duringfailure-free and achieves a quick recovery upon the process fault.     

强化开采及油气重新运移聚集形成剩余油机理研究

运用流体势原理和油气运移成藏理论,研究了油田注水开发中强化开采及油气重新运移聚集形成剩余油机理和剩余油的分布规律。认为以储层非均质性和构造为主的静态因素与水动力、重力、浮力和毛细管力以及摩擦力等构成的动态因素共同控制剩余油的分布。其中水动力和浮力为油气重新运移聚集的主控因素。油藏内剩余油运移聚集遵循由高势区向低势区运聚的流体势原理。油藏内的低势闭合区是油气重新运移聚集的有利区域。研究结果表明,高含水后期剩余油分布总体上可以总结为"普遍分布、局部富集"。     

一种远程容灾系统的设计与实现

设计和实现了一种异地容灾系统,系统采用本地冗余和异地冗余相结合,服务和存储相分离的结构,采用本地控制中心作为事件处理中心和数据转发的缓存。并且设计了一种动态的失效检测算法,算法综合考虑了消息的延迟、丢失、当前网络状况和当前系统状况,能够有效的降低误判率和加快服务自动恢复速度。测试表明该系统的数据恢复速度和服务切换速度有了明显的提高。实际应用中系统运行稳定,性能良好,达到了高级别容灾系统要求。     

"污水处理回收"在张天渠油田油井注水中的应用

介绍了“污水处理回收”在张天渠油田油井注水中的应用，阐述了其流程方案、流程特点和效果以及取得的效益。     

利用软件故障注入提高软件测试覆盖率

软件测试过程是软件生命周期中提高软件质量的重要阶段，但无论结构测试还是接收测试（AT），都很难测试程序的所有分枝，对于容错软件的异常处理和故障恢复代码的测试尤其困难。使得这些代码中可能包含软件故障，反而成为软件质量的隐患，为此采用程序变异的方法对被测软件进行故障注入，用强制的方法执行被测分支，从而提高软件的测试覆盖率。     

节点分析法在分层注采系统中的应用研究

针对二层油藏分层注采实际情况,在分析水平管流、垂直管流、配水嘴嘴流等沿程压降的基础上,基于节点分析原理,建立了二层油藏分层注采系统节点分析数学模型,考虑了层间、注采井间相互作用,大大提高了节点分析的可靠性;通过理论分析和实例计算,确定了分层配产配注量和注入压力,使注采系统处于平衡生产状态,并对多层油藏的节点分析具有一定借鉴意义和理论意义。     

35 ka BP climate simulations in East Asia and probing the mechanisms of climate changes

Interglacial or postglacial climates are all of charac-teristic of warmer conditions. However, if condition asso-ciated with the warm feature is wetter or drier than today,it would produce different impacts on natural environ-ments and human society. Quaternary studies found thatclimate with warm-dry or warm-wet conditions had oc-curred in China during the last 40—30 ka BP[1]. For ex-ample, it was warmer than the present during themid-Holocene (3—8 ka BP) and the late phases of MarineIsot…     

采取综合措施提高煤矿资源回收率

介绍了南阳煤矿通过采取优化设计、合并工作面、减少煤柱的个数、改进放煤操作方式及做好地质预测等措施,最大限度地减少采区煤柱损失、提高煤矿资源回收率的经验。