Towards Enhancement of the Economy of a Thermal Power Generating System through Prediction of Plant Efficiency

The plant ‘Heat Rate’ (HR) is a measure of overall efficiency of a thermal power generating system. It depends on a large number of factors, some of which are non-measurable, while data relating to others are seldom available and recorded. However, coal quality (expressed in terms of ‘effective heat value’ (EHV) as kcal/kg) transpires to be one of the important factors that influences HR values and data on EHV are available in any thermal power generating system. In the present work, we propose a prediction interval of the HR values on the basis of only EHV, keeping in mind that coal quality is one of the important (but not the only) factors that have a pronounced effect on the combustion process and hence on HR. The underlying theory borrows the idea of providing simultaneous confidence interval (SCI) to the coefficients of a p-th p(≥1) order autoregressive model (AR(p)). The theory has been substantiated with the help of real life data from a power utility (after suitable base and scale transformation of the data to maintain the confidentiality of the classified document). Scope for formulating strategies to enhance the economy of a thermal power generating system has also been explored.     

Scheduling Updates of Probabilistic Risk Assessments: The Arkansas Nuclear One-Unit 1 Experience

This paper presents the results of a study that identified how often a probabilistic risk assessment (PRA)should be updated to accommodate the changes that take place at nuclear power plants. Based on a 7-year analysis of design and procedural changes at one plant, we consider 5 years to be the maximum interval for updating PRAs. This conclusion is preliminary because it is based on the review of changes that occurred at a single plant, and it addresses only PRAs that involve a Level 1 analysis (i.e., a PRA including calculation of core damage frequency only). Nevertheless, this conclusion indicates that maintaining a useful PRA requires periodic updating efforts. However, the need for this periodic update stems only partly from the number of changes that can be expected to take place at nuclear power plants–changes that individually have only a moderate to minor impact on the PRA, but whose combined impact is substantial and necessitates a PRA update. Additionally, a comparison of two generations of PRAs performed about 5 years apart indicates that PRAs must be periodically updated to reflect the evolution of PRA methods. The most desirable updating interval depends on these two technical considerations as well as the cost of updating the PRA. (Cost considerations, however, were beyond the scope of this study.)     

论红学的边界性

《红楼梦》自诞生以来，被当成各种属性的文本，它在不同的学科领域被接受，而对于任何一个学科来说，《红楼梦》的阅读现象都呈现出一种边界性。这根源于文本《红楼梦》的边界性，它本身具有小说学、经学、朴学的因素。这种边界性正是红学的生机之所在。边界性不等于混乱与无充，从方法论看，红学具有两个世界；事实还原的世界和意义诠释的世界。     

语篇分析与机器翻译

机译系统应该建立在具有语篇分析的大型语料库基础之上,语篇语料库内的原语和目的语文本不是单向、而应是双向或多向流动的网络系统。文本的译文也应该有历时和共时的区别,因为互文性已是翻译的某种本质特征。     

论李奎报散文中的禅学蕴涵

佛教在高丽时期极为兴盛,对李奎报的文学创作产生了很大影响,尤其是佛教禅宗。在李奎报的散文中,蕴涵着丰富的禅学思想,这主要体现在:(1)一些作品直接阐述禅理、禅意;(2)一些作品间接地表露出禅意、禅境;(3)在艺术手法方面,比喻和典故的大量运用,体现出李奎报对禅学思想的接受。     

论《说文》的方言研究

许慎在《说文》中引证方言俗语是自觉的。《说文》中的方言研究成果形式有显性的和隐性的两种 ,其价值有三 :一是为研究汉代方言保存了具有共时价值的材料 ,二是为后人提供了可资参考的方言研究成果 ,三是对后人研究方言具有方法论意义的启发。《说文》方言研究的主要贡献在于“方言文字学     

论缔约过失责任制度——兼评合同自由与合同正义

缔约过失责任制度的产生与发展是 19世纪下半叶尤其是 2 0世纪以来合同法走向现代化的重要标志之一。缔约过失责任制度的价值论基础 ,就在于诚实信用原则所体现的正义价值与合同自由原则所体现的自由价值构成相倚的两极 ,产生相互亲和的张力。加强对我国缔约过失责任制度的深入研究 ,评析其得失 ,有助于进一步完善我国缔约过失责任制度     

论王重民对敦煌文献整理研究的贡献

在20世纪中国敦煌学的研究发展进程中,王重民对敦煌典籍的寻访、辑轶和研究整理、书目编制等工作为后来该学科的“中国化”提供了全面而系统的史料;尤其在敦煌文献整理与具体学科相结合方面,他的诸多研究方法至今仍具有启示性价值。     

从当代翻译理论看唐代景教的译经模式

景教是基督教的一个异端支派,其在中国传播的200年间,有过大量的经籍翻译。但是,对于景教的翻译活动,学界的研究很不充分。从当代翻译理论的角度对其翻译进行研究,一方面可以为我们研究中国翻译史提供一个视角,同时,对我们进一步认识景教在中国的传播活动无疑是有益的。     

安乐死的立法思考

安乐死立法在我国现阶段会遇到很大的阻力 ,主要是 :首先 ,我国的经济发展极不平衡 ;其次 ,医疗技术和医务人员素质的低水平 ,导致了人们对医生诊断可信度的疑问 ;第三 ,对安乐死立法内容还缺乏科学的认识与把握。因此 ,应当用判例的形式解决当前社会中的安乐死案件 ,同时 ,在某些经济较发达地区制定颁布安乐死的地方性条例 ,待条件成熟时 ,再在全国推广