Designing a variable sampling plan based on Taguchi's loss function

This paper discusses the problem of designing a new variable sampling plan. Suppose that the lot quality characteristic obeys an exponential distribution. Adopting Taguchi's loss function, the objective is to design a plan under which the producer's risk of rejecting a lot that has a specified average loss per item is no greater than alpha, and the consumer's risk of accepting a lot that has a specified average loss per item is no greater than beta. The method of designing this plan is an extension of the method used by Derman and Ross.     

Constructing optimal designs for fitting pharmacokinetic models

We consider some computational issues that arise when searching for optimal designs for pharmacokinetic (PK) studies. Special factors that distinguish these are (i) repeated observations are taken from each subject and the observations are usually described by a nonlinear mixed model (NLMM), (ii) design criteria depend on the model fitting procedure, (iii) in addition to providing efficient parameter estimates, the design must also permit model checking, (iv) in practice there are several design constraints, (v) the design criteria are computationally expensive to evaluate and often numerical integration is needed and finally (vi) local optimisation procedures may fail to converge or get trapped at local optima.We review current optimal design algorithms and explore the possibility of using global optimisation procedures. We use these latter procedures to find some optimal designs.For multi-purpose designs we suggest two surrogate design criteria for model checking and illustrate their use.     

韩国的金融政策与金融危机及对我国的警示

金融危机的爆发对经济发展的危害是巨大的,受这次金融风暴直接冲击的国家,其经济实力普遍倒退７至１０年。其中韩国因货币贬值五成,其经济规模已由世界排名第１２位降至第１７位,人均国民生产总值由１９９６年的１０５４８美元降至目前的６６６４美元,经济实力倒退了...     

直接消耗系数变动的比较分析

一、引言自从Ｗ．Ｌｅｏｎｔｉｅｆ提出投入产出技术以来,投入产出技术在分析经济问题时取得了很大的成功。由于投入产出表的编制及出版一般要滞后于编表年份大约５年左右,并且,投入产出技术的两个基本假定（比例性假定和同质性假定）以及用于实际预测时常假定直接消耗...     

以电磁感应及暂态过程理论指导和解释某些物理实验

本文从电磁感应及暂态过程理论出发对如何做好自感现象的实验给以理论上的阐述,从而指明了应选用具有怎样参数的仪器来做好这一实验.同时对跳圈实验给以理论上的解释.     

关于动力学理論中的扰动方法

本文讨论了动力学理论中求解Vlasov-Maxwell方程的扰动方法,证明了第一次线性化后的高阶分布函数对研究电磁波与带电粒子之间的互作用没有影响,并给出了第二次线性化后的Vlasov-Maxwell方程的一般求解方法.     

MUX級联网络的組合設計

利用MUX级联网络实现多变量逻辑函数时,为求得最简的级联系统,本文提出了利用剩余函数立方图求取变量划分的快速方法。该法无需借助卡诺图,也不需要进行复杂的运算。结果表明,该法行之有效而且十分方便。     

黄化型大麦的系列研究 Ⅲ南黄大麦生长发育的调查

本文系统地报道了南黄大麦与原品种早熟3号在生育期、植株高度、叶片长宽、分蘖数以及穗部性状等方面的比较.指出南黄大麦除出土时间,倒二叶的长宽与早熟3号基本一致,剑叶长宽略大于早熟3号外,其余性状差异显著.植株矮小,生长发育缓慢,这与黄化型大麦叶色浅,叶绿体的片层结构不发达,光合机能弱,光合产物少有关.     

在普通箱式炉中进行气体软氮化的研究

本文论述了以甲酰胺为渗剂,在普通箱式电炉中,对3 Cr 2 W 8 V 等钢进行气体软氮化的研究。成功地解决了3 Cr 2 W 8 V 钢压铸模热处理变形及模具在使用中的粘模问题。提高了模具的使用寿命。     

汽液两相喷嘴中临界流的简化数学模型

本文介绍了考虑汽液两相间的传热、传质与动量交换后,汽液两相喷嘴中临界质量流速的简化数学模型,并根据他人试验结果所作的近似假设,提供了喷嘴中汽液两相流的临界压比计算式。