基于层次分析法的高校贫困生灰色综合认定方法

针对高校家庭经济困难学生资格认定的问题,提出了运用层次分析法来确定评定指标权重;引入灰色系统理论,建立了科学的高校家庭经济困难学生资格等级认定方法,以期实现对学生经济困难程度的准确判定.     

基于REVIT族的刚接柱脚BIM方法研究

基于REVIT族的图形辅助编译功能,可实现参数化驱动图形的建模;通过嵌套族的关联驱动,特别适合于复杂的组合构件族的开发。通过创建刚接柱脚组合构件的嵌套族,阐述了REVIT族在参数的驱动、关联和传递方面的应用优势,探索复杂组合构件的BIM设计方法及其参数控制技巧,为BIM标准化构件信息资讯平台的建立提供必要的探索。     

产品族架构与竞争优势关联影响分析

产品族竞争优势是产品族在市场上比其他同类产品更能带来利润或效益的优势。产品族以大规模定制的方式实现了大规模生产不具备的定制化优势和单一方式不具备的规模优势。通过梳理产品族架构的过程,提出产品族架构的金字塔结构,并分析了影响产品族架构的其他因素;分析了产品族竞争优势,将产品族竞争优势分为规模优势和定制化优势;描述了产品族架构与市场、供应链、企业技术能力、企业制造能力等影响因素对产品族竞争优势的影响的分析模型。     

留守与出走的困境--从巴金的《家》与《寒夜》审视女性与家庭的关系

由于历史的原因，中国女性被束缚在家庭中，这就成了女性在生活和情感上对家庭的强烈依恋。随着女性解放的进行，对于家是留恋还是离开使女性在选择时陷入困境，巴金《家》与《寒夜》就体现了这种选择的尴尬，通过女性生存处境的描写也使我们看到了女性解放过程的艰难。     

基于Pro/E机床夹具三维标准件库的研究与实现

通过对目前现有标准件建库方法的分析对比,采用族表这一非编程建库工具,建立了Pro/E环境下机床夹具三维参数化标准件库.介绍了通过菜单索引文件提供的搜索和注释功能,及如何使这些功能对库内文件进行的有效管理和配置.该方法简单实用,对于实现提高机床夹具的设计水平和设计效率都是非常有效的.     

家族企业社会化变迁模式研究

家族企业被认为是最具普遍意义的企业类型。论述了家族企业可持续经营的脆弱性,使家族企业一直被看作是一种落后的企业制度,从而使理论界忽视了对家族企业成长模式的研究。因此,系统而深入地研究家族企业成长路径及其制约因素,找出不同环境下的企业变迁模式和方法,实现中国家族企业可持续发展,避免从上演到谢幕"各领风骚三五年"的悲剧,这对中国经济来讲,具有重要的理论意义与现实意义。     

变径球面族包络曲面的应用研究

利用变径球面族包络曲面参数式方程研究水利水电工程中的弯管、圆柱岔管过渡带曲面等数学模型，并进行了计算机辅助几何设计．     

Improved activity and thermostability of Candida antarctica lipase B by DNA family shuffling

DNA family shuffling was used to create chimeric lipase B proteins with improved activity toward the hydrolysis of diethyl 3-(3',4'-dichlorophenyl)glutarate (DDG). Three homologous lipases from Candida antarctica ATCC 32657, Hyphozyma sp. CBS 648.91 and Crytococcus tsukubaensis ATCC 24555 were cloned and shuffled to generate a diverse gene library. A high-throughput screening assay was developed and used successfully to identify chimeric lipase B proteins having a 20-fold higher activity toward DDG than lipase B from C.antarctica ATCC 32657 and a 13-fold higher activity than the most active parent derived from C.tsukubaensis ATCC 24555. In addition, the stability characteristics of several highly active chimeric proteins were also improved as a result of family shuffling. For example, the half-life at 45 degrees C and melting point (T(m)) of one chimera exceeded those of lipase B from C.antarctica ATCC 32657 by 11-fold and 6.4 degrees C, respectively, which closely approached the stability characteristics of the most thermostable parent derived from Hyphozyma sp. CBS 648.91.     

A Modification of schwarz's sequential likelihood ratio tests in multivariate sequential analysis

By developing and applying certain results on boundary crossing probabilities of generalized likelihood ratio statistics in multiparameter exponential families, we show that Lai's (1988a) modification of Schwarz's (1962) sequential likelihood ratio tests of one-sided hypotheses in the one-parameter case can be extended to general hypotheses in the multiparameter case. Such tests are shown to be asymptotically optimal, from both frequentist and Bayesian points of view, and numerical results are also given to demonstrate their performance.     

Remark on the modified kiefeer-weiss problem for exponntial families

During his investigations of the modified kiefer-weiss problem Lorden (1980) considered the (auxiliary) problem of minimizing a weighted sum of the error Probabilites and the expected sample size. He derived a compiete solution for one-parameter exponential famlies and "inner" parameter points. Here we treat the remaining case of external points. It turns out that the optimal stopping rules fail to be finite a.s.. An additional example shows that this may happen also for other types of distributions.