安溪凤城悬索桥设计探讨

安溪凤城悬索桥为三跨（６８ｍ＋１４８ｍ＋６８ｍ）钢筋砼悬索桥，设计时通过技术经济分析，选用较小的主孔跨径和较大的垂跨比以求得经济。采用钢筋砼肋板桥面系、斜拉索和抗风索以增加刚度，并对桥梁造型以及使用功能进行了探索。     

具有重特征值的弱阻尼系统的摄动法

利用约束广义逆方法，导出弱阻尼系统摄动法，该方法可处理原系统有重频时的一般情况，并且只需待摄退化模态信息，它是Ｋｗａｋ近期工作的改进和推广。     

四结点任意四边形的杂交／混合元

在给出平面上四结点任意四边形的杂交/混合元的应力及位移模式后,本文算出了它的矩阵〔H_e〕、〔G_e〕及〔R_e〕的具体表达式,为应用带来了方便.其次,还给出了采用高斯消去法来构造单元刚度矩阵的的理论依据及实施方案.算例一则,通过比较,显示出用杂交/混合元计算应力具有较高的精度.     

柔性工作流元模型及应用

随着企业竞争的加剧和政府对提高工作效率的迫切需要,工作流的柔性问题成为研究的热点.以元模型为基础,提出了一种实现柔性工作流的方法.以WfMC过程定义元模型为基础,提出了一种支持工作流柔性的元模型.在此基础上,通过引入ECA规则,对工作流中主要元素进行了形式化描述.以实例说明了该模型在实践中的应用.     

期权在供应链风险管理中的应用

探讨在市场需求不确定的情况下,期权在供应链风险管理中的应用.分析建立在一个单供应商、多分销商的供应链模型上.模型中,每一个分销商既可以从供应商那里直接购买产品,也可以购买期权.期权使得分销商有权选择是否购买额外数量的产品.首先分析了分销商的最优供给策略、供应商的最优生产策略,接着讨论了期权怎样增强信息流、促进风险共享从而提高供应链效率.文章还论述了怎样利用期权来协调供应链各合作伙伴的动机,来提高供应链对市场变化的响应能力.     

灰色评价方法在英语专业基础教学中的应用

个体化教学首先要求对学生当前的学习状况进行准确定位。本应用灰色评价方法，从评估指标和综合水平评价两方面同时入手，依据学生日常学习状况和历次考核成绩对英语专业低年级学生进行科学地，系统的水平定位，并从中分析出个别生的优势和弱项，从而为个别化教学提供可靠的依据。     

Structural biology of protein tyrosine kinases

Our current understanding of the structure, mechanism of action and modes of regulation of the protein tyrosine kinase family owes a great deal to structural biology. Structures are now available for more than 20 different tyrosine kinase domains, many of these in multiple conformational states. They form the basis for the design of experiments to further investigate the role of different structural elements in the normal function and regulation of the protein and in the pathogenesis of many human diseases. Once thought to be too similar to be specifically inhibited by a small molecule, structural differences between kinases allow the design of compounds which inhibit only an acceptable few. This review gives a general overview of protein tyrosine kinase structural biology, including a discussion of the strengths and limitations of the investigative methods involved. Received 2 May 2006; received after revision 21 June 2006; accepted 9 August 2006     

Protein flexibility: its role in structure and mechanism revealed by molecular simulations

Computer simulations at the atomic level have arrived at a stage where they provide realistic modeling of flexibility in proteins (and the mobility of their associated solvent) that is important in understanding the nature of molecular motions. This can now be extended to the molecular and atomic motions that are associated with protein mechanisms. Moreover, the derived data agree reasonably accurately with experimental measurements of several kinetic and thermodynamic parameters. Fundamental insights emerge on the roles that this intrinsic flexibility plays in the thermodynamic characteristics of macromolecules in solution; these equip the investigator to probe the consequences of cognate interactions and ligand binding on entropy and enthalpy. Thus simulations can now provide a powerful tool for investigating protein mechanisms that complements the existing and the emerging experimental techniques. Received 29 May 2005; received after revision 23 August 2005; accepted 21 October 2005     

商业广告翻译漫谈

近年来随着中国经济的迅速发展，商业广告的翻译在信息传播活动中的作用十分重要。现有的翻译原则如“忠实”与“通顺”等不能够确保商业广告翻译的质量，因为商业广告的翻译有其自身的艺术特色，译者应有翻译的敏感度，翻译时要体现出灵活性以及文字搭配的创造性和想象力。本文理论联系实际，就目前商业广告翻译的现状及应注意的一些问题进行广泛地探讨，提出一些见解。     

考虑努力及价格因素的弹性数量契约模型

在需求不确定且与努力水平和零售价格具有相关性的前提下,建立了弹性数量契约模型,通过引入回馈与惩罚策略,解决了单纯的弹性数量契约无法实现供应链协作这一问题。并重点探讨以下两个主要内容:(1)如何确保供应链协作;(2)如何确定最优的努力水平、零售价格和订购量。最后,通过数值例子对协作和分散两种模式进行了分析比较。