最大最小距离的性质及计算

本文讨论了最大最小距离的一些性质，由此得到了最大最小距离的精确算法，并计算了一些常见的正交设计、均匀设计、ＬＨ设计和基于ＯＡ的ＬＨ设计的最大最小距离，进而进行了比较。     

有限奇异酉几何中的计数定理和PBIB设计的构作

设Ｆ＾２ｑ是ｑ＾２个元素的有限域，这里ｑ是一个素数的方幂。本文计算了Ｆ＾２ｑ上奇异酉几何中包含在一个固定的（ｍ，ｒ，ｋ）型子空间里的（ｍ１，ｒ１，ｋ１）型子空间的个数，从而得到一个计数定理；然后分别利用（１，０，０）型子空间及（１，１，０）型子空间作处理构作某些结合方案和ＰＢＩＢ设计。     

应用概率方法计算室内给水管道设计秒流量

本文在深入研究现有室内给水管道设计秒流量计算方法的基础上，应用概率论，以满足使用保证率的室内给水管道设计秒流量为出发点，提出了一种新的计算方法。通过实例计算，分析了使用保证率和卫生器具放水使用概率对设计秒流量的影响，与平方根法和已有概率法作了比较，说明了该方法的合理性和通用性。     

混水平均匀设计的构造

我们用离散偏差来度量部分因子设计的均匀性,本文的目的在于寻找一些构造混水平均匀设计的方法,这些方法比文献中已有的方法更简单且计算成本更低.我们得到了离散偏差的一个下界,如果一个U 型设计的离散偏差值达到这个下界,那么该设计是—个均匀设计.我们建立了均匀设计与组合设计理论中一致可分解设计之间的联系.通过一致可分解设计,我们提出了一些构造均匀设计的新方法,同时也给出了许多均匀设计存在的无穷类.     

可卷型L_2-偏差的水平置换方法构造混合水平设计

提出了一种通过置换因子的水平来构造具有较小可卷型L_2-偏差的混合水平均匀设计的新方法.首先建立了混合水平设计的平均可卷型L_2-偏差与广义字长型的定量关系,并以具有较小广义字长型的混合水平设计为初始设计,对其作水平置换,计算其可卷型L_2-偏差,找到具有最小的可卷型L_2-偏差的设计就是相对较好的设计.为了使算法更加有效,还运用了可卷型L_2-偏差的两个性质.数值结果显示通过这种方法构造的设计在可卷型L_2-偏差下表现良好.     

RAS法迭代误差的正交设计

本文应用正交试验设计手段，对编制投入产出表常用的方法──ＲＡＳ法，就有关传递误差进行了计算，这在国内外尚属首次。计算结果表明，ＲＡＳ的这代误差不可忽视，这一研究具有重要理论价值和实践意义。     

可分解不完全区组设计的若干结果

考虑某类可分解不完全区组设计——PRIB设计的均匀性. 在一离散偏差度量意义下, 得到了PRIB设计是最均匀设计的一个充要条件；证明了均匀PRIB设计是关联的；提出了用某类U-型设计构造这类区组设计的方法, 并给出了该类设计的一个存在性结果, 这一方法建立起了PRIB设计和U-型设计之间的一重要桥梁.     

十六行均匀设计表的结构

本文给出了十六行二至五列均匀设计的不同结构，并且计算出了这些结构的极大最小距离，得出了比文[2]中使用表的极大最小距离还小的均匀设计表．     

有限几何和PBIB设计(Ⅱ)

在有限辛几何中,取定一个(m,s)型子空间,并取与这个子空间正交且不含于这个子空间的一维子空间作处理,我们构作了一些结合方案和PBIB设计,并计算了它们的参数.     

特征不为2的有限正交几何与PBIB设计（Ⅱ）

在本文中,我们在特征不为2的有限正交几何中,取定一个(m,2s,s)型子空间P_0,再取不含于P_0且与P_0正交的(1,0,0)型子空间作处理,构作了一些结合方案和PBIB(3)、PBIB(2)设计,并计算了它们的参数.     

OTL电路中点电压稳定性三次择优

本文用“稳健设计”的观点，分别对ＯＴＬ电路中点电压稳定性“系统择优”，“参数择优”及“容差择优”作出较为系统的介绍     

A new methodology for evaluating sustainable product design performance with two-stage network data envelopment analysis

Sustainable product design has been considered as one of the most important practices for achieving sustainability. To improve the environmental performances of a product through product design, however, a firm often needs to deal with some difficult technical trade-offs between traditional and environmental attributes which require new design concepts and engineering specifications. In this paper, we propose a novel use of the two-stage network Data Envelopment Analysis (DEA) to evaluate sustainable product design performances. We conceptualize “design efficiency” as a key measurement of design performance in terms of how well multiple product specifications and attributes are combined in a product design that leads to lower environmental impacts or better environmental performances. A two-stage network DEA model is developed for sustainable design performance evaluation with an “industrial design module” and a “bio design module.” To demonstrate the applications of our DEA-based methodology, we use data of key engineering specifications, product attributes, and emissions performances in the vehicle emissions testing database published by the US EPA to evaluate the sustainable design performances of different automobile manufacturers. Our test results show that sustainable design does not need to mean compromise between traditional and environmental attributes. Through addressing the interrelatedness of subsystems in product design, a firm can find the most efficient way to combine product specifications and attributes which leads to lower environmental impacts or better environmental performances. This paper contributes to the existing literature by developing a new research framework for evaluating sustainable design performances as well as by proposing an innovative application of the two-stage network DEA for finding the most eco-efficient way to achieve better environmental performances through product design.     

关于最小偏差LH设计

:本文对 LH设计编差的计算进行了研究 ,并得到了 LH设计偏差的下界 ,对寻求整体最优 LH设计进行了讨论     

偏差的误用

［１］第３．４节使用偏差Ｄ作为度量指标,按照Ｄ值的大小作出“均匀设计明显地优于正交设计,并可节省四至十几倍的试验”的结语。本文接着［２］第三节继续剖析偏差Ｄ的组成要素,通过偏差的分解式进一步说明这种评判不合理,是一种“把较优的正交设计评成较差”的数学魔术     

Design Element Concept of squeeze casting process

Design sensitivity analysis and the application of Design Element Concept have been explored. Exploration has focused on expressed sensitivity with respect to material property and shape of the coolant channel. The Design Element Concept has been applied to the die domain, since the design elements can be considered as a direct mapping of the blocks that make up a die. Analytical methods such as Direct Differentiation Method (DDM) and Adjoint Variable Method (AVM) have been employed in calculating the design element sensitivities. All the calculated design element sensitivities were verified with the Finite Difference Method and the results showed close agreement. From the design element sensitivities distribution in the die, the results show that convergence can be observed as more design elements are employed.     

ρ—混合序列加权和的完全收敛性

对混合速度不作限制下，讨论了ρ－混合序列加权和Ｔｎ＝Σ（ｎ，ｋ＝１）αｎｋＸｋ的完全收敛性，推广了Ｗ．Ｆ．Ｓｔｏｕｒｔ的结果。将此新结果应用于线性模型参数β的估计中，得出β的最小二乘估计βｎ的强相合性     

A five facets frame for the design of heuristics

The author suggested to distinguish between the ‘engineering approach’ and the ‘mathematical approach’ in connection with the design of heuristics. Stainton and Papoulias extended the scope by suggesting the ‘relational approach’. Based upon this extension, a five facets frame is presented here which is suggested to precede and accompany the ‘technical’ design of the heuristic. The facets are: coverage by participation, experience by doing, abstraction by structuring, extension by comparison, exploration by creativity.     

Computational methods for aerodynamic shape design

In this paper, various computational methods for shape design in aerodynamics are reviewed. A classification system based on the mathematical structure of the methods is introduced. The fundamental ideas of different formulations are discussed, and the algorithms are described. The advantages and well-known disadvantages of different methods are also briefly discussed.     

搜索区传递2-（q，4，1）设计

对于区传递但非旗传递的可解2-（q，4，1）设计，Camina指出，当q=13，37，61，109，157，181时有具体的例子，但是否有更多的q产生具体例子有待研究。主要结果：设q是素数幂且q=13（mod24），则对于每个q〈2000，总存在区传递但非旗传递的2-（q，4，1）设计。     

变参数随机服务系统最优设计

利用排队理论，建立了一个到达率递增、服务率不变、服务台数量递减的变参数随机服务系统最优设计模型。给出了满足投资有限，在一定时期内设备使用率和用户服务质量满足给定的要求，使用寿命达到设计的服务系统最优设计方案。