精馏过程的节能和优化设计的探讨

精馏过程的节能,对于减少能源消耗,降低生产成本和保护环境具有十分重要的意义.在精馏过程中可以采用最适宜回流比操作和最佳进料状态,使用中间冷凝器和中间再沸器,高效精馏、热泵精馏.合理安排多组分物料分离流程,直接利用过程热量及开发应用高效换热器等措施.本文从最佳回流比R的选择、进料温度及进料状态的确定等方面,详细的分析了在精馏塔的设计过程中,如何实现设计的优化问题,以实现节能降耗.     

试论邮政企业计划财务管理

为更好地适应邮政企业的改革发展,文章从集中化管理、内部经济核算体系、信息化管理、专业化经营以及投资计划管理五个方面探讨了邮政企业计划财务发展的新思路。     

会计准则国际趋同的报告

全球六家主要的国际会计师事务所在2003年2月12日发布了一份最新的国际财务报告准则(IFRS)调查报告:《会计准则的国际趋同报告——2002年全球调查》。该项调查的目的是评价世界各国采纳《国际财务报告准则》的情况和完备程度。调查背景介绍随着国际投资者越来越多地在全球范围内考虑其投资决策,对一个全球一致的财务会计框架的要求也越来越强烈。2001年4月,国际资本市场提出,改组后的国际会计准则委员会应该担负起制定全球统一的、高质量会计准则的使命。世界上主要的会计师事务所对国际会计准则委员会在制定全球统一的会计准则方面所作出…     

济南直选“小巷总理”

前不久举行的济南市历下区佛山苑社区第六届社区居委会选举具有特殊的意义,因为这次的居委会成员将由社区居民代表直接投票选举产生,这一选举方式受到了居民的热烈欢迎.     

新时期加强教师职业道德建设的若干思考

新时期加强都职业道德建设具有重要的意义，要从教师职业特点出发，突出重点，抓住关键环节，搞好教师职业道德教育。     

American-style Indexed Executive Stock Options

This paper develops a new pricing model for American-style indexed executive stock options. We rely on a basic model framework and an indexation scheme first proposed by Johnson and Tian (2000a) in their analysis of European-style indexed options. Our derivation of the valuation formula represents an instructive example of the usefulness of the change-of-numeraire technique. In the paper's numerical section we implement the valuation formula and demonstrate that not only may the early exercise premium be significant but also that the delta of the American-style option is typically much larger than the delta of the otherwise identical (value-matched) European-style option. Vega is higher for indexed options than for conventional options but largely independent of whether the options are European- or American-style. This has important implications for the design of executive compensation contracts. We finally extend the analysis to cover the case where the option contracts are subject to delayed vesting. We show that for realistic parameter values, delayed vesting leads only to a moderate reduction in the value of the American-style indexed executive stock option.     

与时俱进 遵循规律 坚持创新

如何在世纪之初的新形势下切实地贯彻“三个代表”思想,做好行业协会工作,中电联常务副理事长刘宏在山西调研时就此提出自己的见解,现予摘登,以飨读者。     

Computing equilibria of GEI by relocalization on a Grassmann manifold

An algorithm is described to compute equilibria of the general economic model with incomplete asset markets, that is, of GEI. The algorithm is based on the existence of a route of zeros of a homotopy whose domain includes the price simplex and a Grassmann Manifold. This route is followed, in effect, by localizing and following diffeomorphic pieces in Euclidean space, and by relocalizing as is necessary.     

Hiroshima and Nagasaki in Japanese guidebooks

This study investigates the presentations of Hiroshima and Nagasaki as postwar tourism destinations in a selection of Japanese-language guidebooks. Comparison is made between commonly voiced criticisms of Japanese attitudes toward the two atom-bombed sites and the tourism activities suggested by the publications themselves. An expected presentation emphasizing Japanese suffering as a result of the atom bombs is not found in the guides, but neither is an openness to discussion of the war. The conclusions reached find Hiroshima standing as emblematic of the rebuilding nation as a whole, while Nagasaki remains largely outside of the social and cultural dynamics of postwar Japan.