高功率电池碳棒漏液的探讨

本文着重分析ZnCl_2型电池在生产线上有出水漏液的主要原因,并就此问题的解决,提出了相应的技术措施。     

黑龙江二五科区钾质火山岩地球化学特征及成因

基于岩石化学、微量元素、同位素资料,探讨了黑龙江省二克山-五大连池-科洛钾质火山岩带的岩石成因与演化。该区钾质岩浆直接来源于含金云母的地幔,且在浅源岩浆房中曾发生过分离结晶与同化混染作用,但两种作用均不强烈,且后者更弱。白榴苦橄碧玄超基性岩浆是原生岩浆,而白榴碧玄基性岩浆是次生岩浆。它们在浅源岩浆房内分离结晶的矿物相主要为橄榄石和单斜辉石。同化混染的岩石主要是海西期或燕山期花岗岩。     

基于残差符合信息识别残差污染

残差污染的存在对正确检测与辨识坏数据的危害很大,而用一种统一的方法,根据量测残差识别出残差污染,从而准确地检测了与辨识坏数据一直非常困难。文中基于残差符号信息研究状态估计中的残差污染问题,了基于残差灵敏度矩阵和残差符号判断存在严重的残差污染的可能性,在此基础上,提出了利用残差符号信息识别严重的残差污染的方法,用简单的图示直观地描述了这一方法,ＩＥＥＥ３０节点系统上的试验证实了所提出的方法提出了检测     

PMOS-2000电力市场结算子系统

根据中国当前发电侧开放电力市场试点的技术需求,介绍了发电侧开放的电力市场技术支持系统中结算子系统的目标、系统设计原则,以及包括现货市场的结算,差价合约的结算,各类辅助服务的结算、市场价格管制与中止期间的结算及市场成员违背市场交易规则的处罚结算等子系统,总结了该系统在浙江电网发电市场的应用情况。     

变电站自动化分布式通信控制系统的设计

在概述了变电站自动化系统的发展历程之后,提出一种新的分布式通信控制系统。整个系统由若干通信子系统通过以太网构成,除具备常规通信管理功能外,还具有元件级自诊断、远方诊断、网络管理、电压无功控制（VQC）、双机热备用等功能。采用多主网络结构,各通信子系统相对独立,避免了硬件的重复设置。以较低造价实现多32位CPU并行高速运行,远优于单CPU,具有很高的可靠性。     

Finding shrink critical section refactoring opportunities for the evolution of concurrent code in trustworthy software

With the keyword synchronized,Java provides a simple but often over-used synchronization mechanism.Many programmers tend to use a big synchronized section to protect a large block of statements even if many of them are unnecessarily synchronized.Such coarse-gained synchronizations may increase lock contention and thereby decrease the performance of a program,especially in a multi-core environment.The decrease in performance may affect the quality of service provided by the software and hence make the software less trustworthy.To ensure trustworthiness,this paper proposes a source-code level refactoring approach to optimize coarse-gained synchronizations.It exploits dependence and escape information to search for shrinkable critical sections and can transform them into smaller ones automatically.The approach can be used to gradually evolve concurrent code for better quality.In the approach,to achieve more optimizations,we develop a new escape analysis,named escape state analysis,which can not only tell us whether an object finally escapes but also determine the escape states of objects at each program site.With such an analysis,more refactoring opportunities can be found.We build a tool and test our refactoring approach on several benchmark programs.The results show that the proposed approach does make effective refactoring suggestions for the users.     

位置PID控制在望远镜控制系统中的应用

本文分析了位置控制在望远镜控制系统中的应用。并详细介绍了位置PID控制在望远镜控制系统中的设计方法与步骤。实验表明采用位置PID控制方法可以改善望远镜的控制性能,达到更高的控制精度。     

Robust cooperative spectrum sensing schemes for fading channels in cognitive radio networks

In cognitive radio systems, cooperative spectrum sensing can detect the presence of the primary user accurately. In practice, however, since the sensing observations are forwarded to a data collector through fading channels, the sensing performance is severely degraded. To deal with this problem, in this paper, we first propose a secondary user selection based cooperative spectrum sensing method to improve sensing performance by decreasing the reporting errors introduced by the fading channels. Mo...     

在认知中继网络中基于放大转发与最佳中继的最优功率分配算法

由于受认知无线电与中继通信技术的启发,提出了一种认知中继网络模型.该模型由源节点、目的节点、认知中继节点及主用户(primary user,PU)构成.认知中继节点以与PU共存的方式为源节点辅助传输信息到目的节点,只要保证其对PU通信造成的干扰在PU干扰门限值以下.假设源节点、目的节点和认知中继节点之间的瞬时信道边信息(channel side information,CSI)和认知中继节点到主用户之间的均值信道增益已知的前提下,研究该模型中的认知中继节点分别采用放大转发(amplify-and-forward,AF)和基于AF的中继选择(selection AF,S-AF)下的功率分配策略,该策略以最小化系统中断概率为目标,同时也满足认知中继节点的发射功率约束(包括总发射功率和个体发射功率约束)和对主用户的干扰功率约束.最后,通过数值仿真来验证推导出的功率分配策略.仿真结果表明:本文提出的最优功率分配策略,无论在AF,还是S-AF下,均能明显的改善系统的中断性能和平均吞吐量;同时在S-AF下最优分配策略可以得到更高的平均吞吐量,因此中断概率更小.