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.     

Temporal pattern in number of staff on sick leave: the effect of downsizing

Summary.  The pattern of absenteeism in the downsizing process of companies is a topic in focus in economics and social science. A general question is whether employees who are frequently absent are more likely to be selected to be laid off or in contrast whether employees to be dismissed are more likely to be absent for the remaining time of their working contract. We pursue an empirical and microeconomic investigation of these theses. We analyse longitudinal data that were collected in a German company over several years. We fit a semiparametric transition model based on a mixture Poisson distribution for the days of absenteeism per month. Prediction intervals are considered and the primary focus is on the period of downsizing. The data reveal clear evidence for the hypothesis that employees who are to be laid off are more frequently absent before leaving the company. Interestingly, though, no clear evidence is seen that employees being selected to leave the company are those with a bad absenteeism profile.     

论袁枚诗歌的民主意识

袁枚生活的乾嘉时期 ,民主意识随着资本主义因素的增长而有所发展 ,袁枚在他的诗歌理论和创作中突出地表现了这种可贵的民主意识。这主要体现在五个方面 :对儒学及其传统的叛逆 ;反对等级特权 ,提倡平等 ,尊重女性 ;批判封建礼教 ,大胆表现男女之情 ;“唯我是适” ,追求精神自由与个性解放 ;“不讳好财” ,“九州添设富民侯”的金钱观念。它们代表着袁枚“性灵”诗歌所独有的思想价值。     

论公司价值的创造

公司价值最大化已经成为公司管理的终极目标,如何实现价值创造便成为公司管理的现实目标。公司战略、公司治理和公司理财对公司价值的三个价值推动要素都有很大的影响,因此,需要融合公司战略、公司治理和公司理财来实现价值创造。     

上市公司并购重组与企业整体资产评估

随着我国证券市场的日益发展和完善,上市公司间的兼并、收购和资产重组等经济活动日趋频繁,企业整体资产评估是并购重组过程中资产业务的基础,是资产或产权交易的前提条件。尽管实践中可以通过多种估价方法来估测企业整体资产的价值,但由于我国资产评估市场尚不成熟,企业整体资产评估缺乏科学、可行的评估体系,评估结果难以真正地反映企业整体资产的内在价值。因此,必须采取有效措施规范资产评估市场,提高整体资产评估的质量,为证券市场的健康发展打下良好的基础。     

我国市场经济的价值取向--思想政治教育内容探讨之二

文章根据我国市场经济的性质以及市场经济在发展过程中对社会生活各方面所产生的不同影响,分析论证了我国市场经济的价值取向是经济价值、政治价值和思想文化价值三者的统一.     

编辑的文化视野与价值取向

编辑的文化视野、社会角色、知识结构与精神产品密切相关。反映时代主流的文化视野决定了编辑对精神产品的取舍更多地指向现实和未来;关注社会现实的文化视野决定了编辑对精神产品的取舍服从于社会现实,并着力体现出社会的主流文化和价值导向;导向性的文化视野决定了编辑在对精神产品的选择、加工活动中引导并影响人们的价值取向。编辑的社会角色有社会的规范性角色、学科权威角色和内化式角色,编辑对自己社会角色的认识过程决定了其对精神产品选择时的价值取向。编辑运用自己的知识结构对精神产品的内容进行取舍和加工,同时又通过这一活动丰富、升华自己的知识结构。     

小说《恶心》的思与诗

萨特的存在主义哲学是阐释生命意义的诗性学说,萨特的存在主义文学是追问人生价值的哲学言说。小说《恶心》就是思与诗密切相依的典范。它昭示了人如何从萨特哲学对本质所界定的事实性否定命题通向对存在所设想的价值性肯定命题。     

马克思价值形态理论的形成与发展

马克思价值形态理论是其劳动价值论区别于古典学派劳动价值论的根本特征之一,也是其货币理论的基础。科学地分析和论证马克思的价值形态理论和货币基础理论的形成,有助于人们深刻认识和理解其经济学理论。     

Seemingly unrelated regression on the autoregressive (Ar(p)) singular equation system

This paper studies the estimation of seemingly unrelated regressions (SUR) of singular equation systems with an autoregressive error process (AR(p)) for each equation.Parameter estimates of the autoregressive singular equation system are not generally invariant to the equation deleted. Under the model specification restriction on the autoregressive parameters, the invariance property is preserved, and this paper shows that a single equation generalized least squares (GLS) estimation for a general autoregressive error process is equivalent to the SURGLS estimation of the AR(p) singular equation system.