水库水面蒸发量计算方法的研究

根据水库水面蒸发机制，结合前人研究成果，提出一种新的水库水面蒸发量计算模型，利用不同气候区多站资料确定模型参数，并利用全国各地30多个水库漂浮蒸发站实验资料，对模型进行拟合检验与移用检验，结果表明，该模型的适应性很强，有推广前景。对模型特性较深入的分析说明，该模型较过去常用的几种模型有许多更合理之处。     

关于DEA有效性理论的一点探索

给出经典的基于输入和输出的DEA模型,把基于DEA模型相结合的相对效率模型引入评价证券相对有效性,以风险作为输入,期望收益率作为输出,便可以用DEA模型评价每只证券相对有效性。     

考虑地基变形影响的高墩柱抗推刚度的解析方法

对高薄壁墩墩底弹性和墩底固结时的抗推刚度和结构内力进行了分析,通过对两种结果的比较,给出了主墩合理截面的确定方法。针对基础形式,考虑地基弹性变形影响,用能量法原理对桥墩竖向受压稳定临界力作了详细的讨论.结合算例分析,得出了一些有益结论。     

三峡左右岸电站机组稳定性能和能量特性的试验与研究

稳定性能和能量特性一直是检验和评价水轮发电机组好坏的关键性指标,也是水电站安全和经济运行的基础.对三峡左右岸电站水电机组进行了大量的真机试验,对5种机型的压力脉动、振动和摆度、稳定运行区、出力和效率曲线进行了对比分析,掌握了三峡左右岸电站5种机型的稳定性能和能量特性,为指导三峡电站机组的安全稳定和经济运行奠定了基础.     

基于Eclipse的Scal模块实现毛管力和相渗数据合并的方法

在应用研究Eclipse软件的基础上,提出了利用Eclipse软件提供的Scal模块按照油藏模拟器要求把毛管力和相渗数据合并成一个新的以相饱和度相联系的饱和度函数表的新方法。实践表明,该方法简便实用。     

COMPETITIVENESS AND STABILITY OF COLLUSIVE BEHAVIOR

We investigate the relationship between the degree of competition and the stability of collusive behaviour, by introducing the element of relative performance in the objective functions of the firms. We show that an increase in the degree of competition destabilizes the collusion. This relation differs starkly in the standard symmetric Cournot and Bertrand duopoly models, with the former being more unstable than the latter.     

下动式折弯机几何精度调整

文章以AMADA公司生产的RG系列折弯机为例,介绍下动式折弯机几何精度调整的方法,为同类设备精度调整提供了参考。     

Reciprocity in Ranked Relationships: Does Social Structure Influence Social Reasoning?

Many economic and evolutionary theories have modeled cooperation as the evolutionary outcome of decisions made by autonomous, self-interested agents operating in a social vacuum. In this paper we consider the implications for cooperative interactions when prior social structures and corresponding social norms exist. In particular we investigate the influence of social rank/status on perceptions of fairness and tolerance of cheating. We review evidence from a series of experiments employing the Wason selection task (a test of conditional reasoning) and the ledger task (a decision making task) suggesting that people cued to adopt a perspective of high social rank are more tolerant of cheating and simultaneously believe that they have been more fairly treated (even when cheated) than people cued to adopt a perspective of low social rank. However, the evidence also suggests interesting cross-cultural differences in perceptions of fairness and tolerance of cheating in ranked relationships. This revised version was published online in August 2006 with corrections to the Cover Date.     

中小企业竞争力与其学习机制探析

在激烈的市场竞争环境中,中小企业在自己比较擅长的领域中对知识进行不断地积累和持续地学习是培育其核心能力、获得内在竞争优势与长期发展的关键。中小企业对于外部环境、市场信息和技术变化能够迅速捕捉到资讯,在此基础上进行有序的跟踪和学习,其效果直接和本企业的学习机制密切相关,企业学习机制的运行状况同时受到多种因素的综合影响,了解各因素的作用机理有助于企业调整学习机制运行方式以达到更好的效果。