含有三个非球面的卡塞格林系统光学设计

介绍了一种含三个非球面的卡塞格林系统的设计思想，给出了一个设计结果。焦距２．８ｍ，Ｆ／５．６，视场３．２°，主镜、次镜均为６次方非球面，场镜含一４次方非球面，成像质量接近衍射极限，畸变也得到了校正。     

离心泵叶轮轴面流道计算新方法

现有的两类一元理论离心泵叶轮水力设计方法存在试凑性工作量大或盖板形状不为简单曲线的缺陷。本文提出了符合一元理论的离心泵叶轮轴面流道过流断面的一种新的分布规律,并给出了按照此分布规律计算叶轮轴面流道过流面积的计算方法和公式。将其与传统的两类设计方法做了比较。     

Adding more observations to saturated D‐optimal resolution III two‐level factorial designs

We consider the class of saturated main effect plans for the 2^k factorial. With these saturated designs, the overall mean and all main effects can be unbiasedly estimated provided that there are no interactions. However, there is no way to estimate the error variance with such designs. Because of this and other reasons, we like to add some additional runs to the set of (k+1) runs in the D‐optimal design in this class. Our goals here are: (1) to search for s additional runs so that the resulting design based on (k+s+1) runs yields a D‐optimal design in the class of augmented designs; (2) to classify all the runs into equivalent classes so that the runs in the same equivalent class give us the same value of the determinant of the information matrix. This allows us to trade runs for runs if this becomes necessary; (3) to obtain upper bounds for determinant of the information matrices of augmented designs. In this article we shall address these approaches and present some new results. © 2002 Wiley Periodicals, Inc. J Combin Designs 11: 51–77, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/jcd.10026     

Fatigue failure criteria and degradation rules for composites under multiaxial loadings

To develop design rules for dynamically loaded composite structures, extensive static and cyclic tension/compression-torsion tests were carried out on carbon-fibre-reinforced composites, in which especially the important influence of multiaxial loading conditions on their fatigue behaviour was investigated. Physically based failure criteria for static loadings are modified for multiaxial cyclic loadings, and a good agreement with experiments is achieved. Russian translation published in Mekhanika Kompozitnykh Materialov, Vol. 42, No. 5, pp. 631–641, September–October, 2006.     

High-accuracy surface position sensor based on a two-lens system

Two optical lenses are used to compose a surface position measuring system. A measurand is positioned near the front focal point of the first lens. At the output end of the other lens, a beam splitter is used to split the beam into two paths. One photodetector is positioned before the focal point of the lens in one path and another after the focal point in the other so that the intensities falling onto the two detectors can be adjusted to be equal when the first lens is in focus. This device provides a compact and high-accuracy surface sensor. In this paper, the design and experimental study of the sensor system is described. It is shown that such a sensor embodiment can lead to a resolution of 1 μm.     

四值单稳态触发器设计

在二值单稳态触发器设计的基础上，提出了四值单稳态触发器的设计方案．经过PSPICE模拟，所设计的电路具有正确的逻辑功能，并能由此方法推广到基值更高的单稳态触发器的设计．与二值单稳态触发器相比，四值单稳态触发器具有更强的功能．     

Designing and reporting on computational experiments with heuristic methods

This article discusses the design of computational experiments to test heuristic methods and provides reporting guidelines for such experimentation. The goal is to promote thoughtful, well-planned, and extensive testing of heuristics, full disclosure of experimental conditions, and integrity in and reproducibility of the reported results.     

用Mathematica解一个系统的优化设计问题

Mathem atica软件 [1 ] 拥有符号运算、数值计算、和图形演示等广泛的数学计算功能 .本文用Mathematica解决了一个系统的优化设计问题 .通过对各容差搭配方案下目标值 y的方差估计和计算机随机模拟两种方法 ,得到了该系统的最优设计方案 .这两种方法也适用于一般的系统最优设计问题     

结构试验台座的选型与设计计算

综述了各类结构试验台座的特点。介绍了结构试验台座的设计计算方法，结合实例进行了台座的选型，并对台座的基础，板厚，锚固骨架进行具体设计计算。