Design invariants

This paper generalizes the results of Kohler concerning the construction of t-(v, k, ) designs having a group action. Difference families are defined for arbitrary groups and arbitrary design parameters. Furthermore, the results of Brand and Huffman concerning topological invariants of t=2 designs are generalized to arbitrary values of t.The research in this paper was partially supported by an NTSU Faculty Research Grant (# 35524).     

Design with L-splines

We recently obtained a criterion to decide whether a given space of parametrically continuous piecewise Chebyshevian splines (i.e., splines with pieces taken from different Extended Chebyshev spaces) could be used for geometric design. One important field of application is the class of L-splines, that is, splines with pieces taken from the null space of some fixed real linear differential operator, generally investigated under the strong requirement that the null space should be an Extended Chebyshev space on the support of each possible B-spline. In the present work, we want to show the practical interest of the criterion in question for designing with L-splines. With this in view, we apply it to a specific class of linear differential operators with real constant coefficients and odd/even characteristic polynomials. We will thus establish necessary and sufficient conditions for the associated splines to be suitable for design. Because our criterion was achieved via a blossoming approach, shape preservation will be inherent in the obtained conditions. One specific advantage of the class of operators we consider is that hyperbolic and trigonometric functions can be mixed within the null space on which the splines are based. We show that this produces interesting shape effects.     

关于容差设计

本文提出用参数设计和容差设计同时完成的新方法扩大产品原器件的容差，来改进生产。     

Patterned Systems Design

The explosion in the use of on-line computer systems has resulted in very large numbers of people being exposed to these systems and has added greatly to the importance of ‘user-friendliness’.In this paper, a fresh approach, which makes ‘option’ selection easier, is described. The approach not only leads to user-friendly systems but also aids the design process, program development and testing, and system maintenance.The essence of the approach is that it leads to systems which conform to familiar patterns.     

Design of designs

Representing a design graphically can make certain properties of a design obvious that otherwise would require tedious reasoning. This holds for symmetries, resolvability, and subdesign inclusion in appropriate cases. We describe how a graphical representation can be achieved in many cases and show several examples, in particular visualizations of the biplanes on up to 16 vertices and subdesigns of the large Witt design. © 2011 Wiley Periodicals, Inc. J Combin Designs 20:1–22, 2012     

正交试验设计法在EBM灭火器参数设计中的应用

应用正交试验设计法 ,完成了 EBM灭火器的技术创新项目 ,复动装置的结构参数优化成功 ,把 2 .5公斤装置提高到 4公斤装量 ,满足了用户提出的降低重量 ,减小体积的要求。为进一步开发管网式、吊挂式等新产品打下了良好的基础。这项成果 ,将为企业带来很高的经济效益     

关于正交设计与均匀设计的比较（Ⅱ）

本文通过对优化效率的比较，继续［１］说明在主要方面正交设计要比均匀设计更好。     

关于正交设计与均匀设计的比较（Ⅰ）

本文通过对优化效率的比较，说明在主要方面正交设计要比均匀设计更好。     

关于正交设计与均匀设计的比较（Ⅲ）

本文通过平均冒尖性（差值评分λ）和极大最小距离ｄ的比较，继续［１，２」说明正交设计的优化效率在主要方面要比均匀设计更好．另外，举反例表明“分散性带来冒尖性”并不绝对有序．     

Creative Systems Design.

Journal of the Operational Research Society -     

Deformable Smooth Surface Design

A new paradigm for designing smooth surfaces is described. A finite set of points with weights specifies a closed surface in space referred to as skin . It consists of one or more components, each tangent continuous and free of self-intersections and intersections with other components. The skin varies continuously with the weights and locations of the points, and the variation includes the possibility of a topology change facilitated by the violation of tangent continuity at a single point in space and time. Applications of the skin to molecular modeling and to geometric deformation are discussed. Received December 12, 1996, and in revised form December 4, 1997.     

基于CAIV/EA的武器装备经济可承受性优化设计

根据费用作为独立变量(CAIV)和渐进式采办(EA)策略的基本思想,研究了基于CAIV/EA的经济可承受性优化设计模型.根据多属性效用理论建立关于用户需求实现程度的综合效用目标函数;通过质量功能展开技术建立作战需求与设计参数的函数关系;依据"权衡空间"概念,确定约束条件.实践证明,该模型可以优化系统设计参数值,得出研制各批次的工作计划和资源分配规划,实现用户需求、资源能力和技术水平的平衡,从而提高装备经济可承受性.     

Design isomorphisms and group isomorphisms

In this paper conditions are given which imply that a design isomorphism between designs with group actions is in fact a group isomorphism. The conditions are geometric. Automorphism groups are then calculated for a family of designs using the geometric conditions.The research in the paper was conducted at Loyola University of Chicago.     

Dynamic Programming in Transformer Design

The paper shows how the technique of dynamic programming was applied to the problem of determining the optimum mix of widths of steel used to ‘pack’ a transformer coil.The approach enables the designer to specify and vary the number of widths to be incorporated into the design. It transpires that, beyond a relatively small number, the ‘coverage’ obtained is largely independent of the coil diameter.