理工科学生英语写作中冠词冗余实证研究

根据信息论的观点,冗余与信息量成反比,冗余越多,真正有用的信息就越少。写作中的冗余信息越多,反映出写作者文章中有效的信息量越少,写作传达的有效信息就越少。文章是关于理工科学生英语写作中冠词冗余的一个实证研究。该研究的目的是帮助理工科学生在写作中摒弃冗余信息,有效传达信息量。     

汉语羡余现象类型与语言演变理据思考

新中国建立后汉语羡余现象是语言研究的一个热点,对于汉语中是否存在“羡余”以及“羡余”包括哪些形式、具有哪些功能等问题一直处在讨论中。文章将对汉语词法和句法组构中已有研究的羡余形式加以分析,归纳汉语“形式羡余”类型,并说明语言的羡余性是语言发展演交的重要理据。     

元代冗官述论

元代冗官,不仅普遍存在,还以官府名目繁多重叠、多员制泛滥和高官剧增肆虐于政坛,从而成为继两宋以后又一个官府冗滥甚为突出的时期。蒙、汉政治文化二元体制下的汉地官与蒙古游牧官的拼加混合,直接导致了官府叠床架屋。蒙古忽里台贵族会议旧俗和统治者视官爵如赏赐的放纵政策,又为多员制泛滥和高官剧增推波助澜。蒙古皇室贵族及怯薛近侍等在冗官浪潮中扮演了不光彩的角色。     

A Problem of Dimensionality in Normal Mixture Analysis

Suppose the p -variate random vector W , partitioned into q variables W₁ and p - q variables W₂, follows a multivariate normal mixture distribution. If the investigator is mainly interested in estimation of the parameters of the distribution of W₁, there are two possibilities: (1) use only the data on W₁ for estimation, and (2) estimate the parameters of the p -variate mixture distribution, and then extract the estimates of the marginal distribution of W₁. In this article we study the choice between these two possibilities mainly for the case of two mixture components with identical covariance matrices. We find the asymptotic distribution of the linear discriminant function coefficients using the work of Efron (1975 ) and O'Neill (1978 ), and give a Wald–test for redundancy of W₂. A simulation study gives further insights into conditions under which W₂ should be used in the analysis: in summary, the inclusion of W₂ seems justified if Δ 2.1, the Mahalanobis distance between the two component distributions based on the conditional distribution of W₂ given W₁, is at least 2.     

Redundancy in Designs

The author contends that a previous Risk Analysis article overemphasized the pitfalls of incorporating redundancy into designs. Relevant aspects of that article are reviewed and commented upon, then the potentials and pitfalls of redundancy in systems and procedures are more broadly discussed. To provide a solid foundation for that discussion, some definitions for systems risk analysis terminology are presented. It is shown that pairs and larger sets of related failures (the physical causes of shortfalls in redundancy effectiveness) can be divided into two types: (1) cascading/induced failures and (2) common-external-cause failures. Each type has its own physical characteristics and implications for mathematical modeling. Service experience with large-commercial-airplane jet-engine propulsion systems is used to illustrate the two types of related failures. Finally, an overview is provided of event-sequence analysis, an alternative approach to systems risk analysis. When the possibility of related failures of mutually-redundant system elements must be accounted for, event-sequence analysis can usually do that better than fault-tree analysis.     

《计算机系统容错技术》课程教学研究与探讨

《计算机系统容错技术》是计算机科学与技术专业一门新的课程,本文分析了《计算机系统容错技术》课程性质与特点,对教学过程的重点难点进行了研究和探讨,以达到提高教学质量和教学效果的目的。     

汉英双宾语句的类型差异

汉英双宾语句式在语言共性基础上存在成系统的对立,汉语里没有英语里常见的表制作服务义的双宾语句式,英语里没有汉语里常见的表获取义的双宾语句式。从动词的及物性强度、语义冗余以及论元增容等三个方面出发,在前人研究的基础上对双宾语句的类型差异进行更进一步的解释。     

语言冗余与英汉翻译

冗余现象广泛存在于各种语言中,英语也不例外。冗余信息是制约翻译过程的一个很重要的问题,它直接影响了交际效率。本文详细阐述并分析了英汉两种语言中冗余信息的类型及其形成的原因,着重探讨了语义性冗余信息的各种表现形式,说明如何在具体翻译实践中对冗余信息进行翻译。同时,不同文体冗余信息需要不同的翻译手段来进行合理的处理,以提高交际效率,达到语言流畅。     

财务冗余对企业并购活动的影响研究

以2016—2017年制造业上市公司为研究样本,采用目标法度量财务冗余,运用逻辑回归分析研究财务冗余、现金冗余及负债冗余对企业并购活动的影响。研究结果表明,财务冗余显著促进企业并购活动,现金冗余和负债冗余与企业并购活动存在显著正相关关系。     

基于三重冗余的ETS控制系统设计及可靠性评估

针对汽轮机安全保护系统的高可靠度和高安全度要求,提出了基于三重化冗余容错技术的危急跳闸系统(ETS)设计方案。系统从输入模块、传输总线、主控制器到输出模块均采用硬件三重化无耦合设计。通过通道内自监测和通道间互监测及同步策略实现系统的故障处理与隔离。通过设立输入、输出数据表决面及H型结构硬件表决器表决面,根据可预设的表决适应方案使系统实现了二次故障工作、三次故障安全,以较少的余度实现较高的容错能力。考虑可修复条件下建立了系统的马尔可夫可靠性模型,并进行了系统的可靠度和安全度分析。仿真结果验证了该系统具有很高的可靠性和安全性。通过现场调试和长时间通电实验,验证了系统满足汽轮机组安全保护装置的要求。