电力系统潮流计算的模拟进化方法

将模拟进化方法引入电力系统潮流计算。与传统方法比较结果表明,模拟进化方法中的进化策略法可以有效地解决电力系统病态潮流问题。文中还对几种模拟进化方法进行了比较,结果表明：进化策略法用地潮流计算比较成功;基因算法和进化规划法由于方法本身的缺陷,不太适合于潮流计算。     

四元体系Na2B4O7—Na2CO3—NaCl—H2O在0℃时的等温溶度研究

第一次用等温方法测定了含硼酸盐的三元边界体系Ｎａ２Ｂ４Ｏ７－ＮａＣｌ－Ｈ２Ｏ和四元体系Ｎａ２Ｂ４Ｏ７－Ｎａ２ＣＯ３－ＮａＣｌ－Ｈ２Ｏ在０℃时的溶度。结果发现它们都是低共饱型体系。在三元体系中共饱点组成为ＮａＣｌ２６．１９％,Ｎａ２Ｂ４Ｏ７０．３６％（质量）;四元体系中共饱点组成为ＮａＣｌ２３．５５％,Ｎａ２Ｂ４Ｏ７０．６２％,Ｎａ２ＣＯ３４．０７％（质量）,并且绘出了四元体系中的溶度图和等水线。     

季节性商品供应商的生产库存及定价策略研究

针对需求率对价格敏感的季节性商品,研究了其供应链上制造商为主动调控零售商的采购量、平稳需求及减少库存等而应采用的最佳定价及生产库存策略;给出了寻优的迭代算法和应用实例,说明了所给策略确实能让供应商和销售商获得更多的利润。     

重庆市热处理产业废弃物处理处置现状与对策

在对重庆市热处理产业废弃物的类型、特性、产生量及处理情况等进行大量调研的基础上,对其废弃物的危害特性及环境影响状况进行了分析,并针对重庆市热处理行业的生产现状和发展趋势,提出了其废弃物的处置对策是:加强政府有关部门的统筹规划和政策性指导,督促热处理生产企业对所产生的废弃物进行合理化、减量化和循环再生利用。     

实质重于形式原则对所得税的影响

《企业会计制度》中新增加的实质重于形式原则，要求企业应当按照交易或事项的经济实质进行会计核算，而不应当仅仅按照它们的法律形式作为会计核算的依据。实质重于形式原则的运用使得会计制度与税法在融资租入固定资产的确认与计价、借款费用资本化的确认、收入的确认和资产减值准备的计提等方面的处理存在差异，当企业向税务机关缴纳所得税时，必须将企业的会计所得调整为纳税所得。     

玉米候选抗病相关基因片段的克隆

根据已经克隆的植物抗病基因和候选抗病基因的保守序列P-loop、Kinase-2及GLPLAL设计一系列简并引物，利用同源序列扩增法，对玉米的基因组DNA进行PCR扩增，并对5个扩增产物的克隆进行测序．测序结果在Gen—Bank内进行BLAST检索，发现A9克隆序列与玉米BAC库中的206C17克隆的部分序列有很高的相似性，并且距离GenBank内注册的玉米抗锈病基因rpl位点中的rpl-3基因、rpl-4基因分别约有66Kb、20Kb，且A9克隆序列在玉米基因组中是单拷贝的．这为玉米抗锈病性状的分子标记辅助选择和抗锈病基因的克隆奠定了良好的基础。     

Lightning activity on the central Tibetan Plateau and its response to convective available potential energy

Lightning flash activities on the central Tibetan Plateau have been studied by using the satellite-based Lightning Imaging Sensor(LIS)database from January 1998 to July 2002.The lightning activity shows a clear diurnal variation on the central Plateau.The peak lightning activity appears at about 17:00 which is 3 h earlier than that in Jingxhou,Hubei in the same latitude belt nearby,indicating that the lightning activity is a sensitive indicator of solar heating on the Plateau.The lightning discharge is weaker on the Plateau than Jingzhou.Hubei and other low-altitude continental regions because of the lower convective available potential energy(CAPE)on the Plateau.The CAPE on the Plateau is 12 times lower than that in Jingzhou,Hubei,and 20 times lower than that in the sea-level region,such as Guangzhou and Florida.However,the sensitivity of lightning activity to CAPE changes on the Plateau is up to 30 times more sensitive than other prominent low-altitude regions.     

C－isotope composition and significance of the Sinian on the Tarim plate

102 samples of limestones,mudrocks shales and tillites from the Sinian in Kuluketage have been analyzed ,Four formations in the Sinian belong to glacial deposits in which the differences in δ^13C are distinct (-14.7‰- 4.2‰),Distinctly negative δ^13C excursions for three times support the viwe of three glacial deposits in this area suggested by previous authors,except for the durations of them ,δ^13C values are generally positive in the Beiyixi Formation of lower part of the Lower Sinian ,representing probably the rock records of a continental rift related to break-up of the Rodinian supercontinent,There are three times of distinct excursions of δ^13C curve in all strata,The first one is from positive values at the bottom to about -5‰ at the top of the Beiyixi Formation ,The second one,from 0‰-3‰ in the Arletonggou Formation of upper part of the Lower Sinian to -3.4‰---14.4‰ in the Teruiaiken Formation.The third one,from positive values in the Zhamoketi Formation of lower part of the Upper Sinian to negative values in glacial varves at the top of the Hankeerqiaoke Formation.     

A new Euprox from the Late Miocene of Yuanmou,Yunnan Province,China,with interpretation of its paleoenvironment

The Yuanmou Basin of Yunnan Province is a hotspot for the research of early homind evolution and its environmental background.During the implementation of the Program“Research of the Origin and Evolution of Early Man and Its Environmental Baqckground” from 1998 to 2001,a huge quantity of hominoid and mammal fossils were collected.The present report systematically describes an Euprox robustus sp.nov.identified during the recent laboratory work on the collected material.Euprox is a group of earliest cervids with true antlers.The new species is the third one of the genus discovered in China.Judged by its morphologic characteristics,the new species feed on juicy and tender leaves of dicotyledon.It implies that the vegetation of its epoch in the Yuanmou Basin is a kind of southern subtropical evergreen forest and the climate is humid and temperate with evident seasonality.The latter is mostly influenced by the monsoon and secondly by the latitude.     

Inorganic chemical composition and source signature of PM2.5 in Beijing during ACE-Asia period

Aerosol samples for PM2.5 were collected in Beijing for 38 consecutive days from March to April 2001 using an IMPROVE Sampler. Concentrations of 20 elements in PM2.5 were determined using a PIXE method. Results show that the average mineral dust concentration of PM2.5 was 14.6 Ilg/m3 during the observation period. On the sand-dust event days of March 21 and April 10, dust PM2.5 mass concentrations were 62.4 and 54.1 μg/m^3, respectively.These demonstrate that fine particle pollution by dust event in Beijing was very severe. The enrichment factors of S and Cu reached minimums on the dusty days and were high on the non-dusty days. It is considered that enrichment factors of elements in PM2.5, which are associated with human activities, can probably provide an effective method to distinguish local sources from external sources of dust. Factor analysis on the chemical composition in PM2.5 shows that sources of crustal matters, anthropogenic emission, and oil combustion contributed to PM2.5 levels in air in the springtime of 2001 in Beijing.