基于不同摄像机配置的空间点检测模型及精度研究

针对空间点检测问题给出了一种简便而精确的空间点检测方法并建立了实验环境下的数学模型,提出了视差为零时,所测得的空间点深度最接近真实值的假设,并得到如下结论：给定空间点,深度不变,基线越短,光轴的夹角越小；深度改变时,基线一定,则深度越长,夹角越小。推导出在不同基线、不同深度下摄像机光轴之间理想夹角的数学模型并通过实验进行了验证。该方法对实际双目检测系统的摄像机配置有一定的指导作用。     

Determination of the rheological behavior of epoxy–amine thermosets by dynamic mechanical analysis: Isothermal methods versus nonisothermal methods

The reticulation process of an epoxy resin using an amine as a cure agent was studied at different temperatures and concentrations of the cure agent with dynamic mechanical thermal analysis. The study was performed under both isothermal and nonisothermal conditions, and a temperature–time–transformation diagram was obtained. The measurements from the two modes gave similar results, although the nonisothermal mode required fewer experiments. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 1965–1977, 2003     

Simultaneous Pseudo-Timestepping for PDE-Model Based Optimization Problems

In this paper we present a new method for the solution of optimization problems with PDE constraints. It is based on simultaneous pseudo-time stepping for evolution equations. The new method can be viewed as a continuous reduced SQP method in the sense that it uses a preconditioner derived from that method. The reduced Hessian in the preconditioner is approximated by a pseudo-differential operator, whose symbol can be investigated analytically. We apply our method to a boundary control model problem. The new optimization method needs 3.2-times the overall computational effort of the solution of simulation problem alone.     

300 MN水压机垫板组力学行为规律研究

针对巨型水压机多层垫板组力学行为的多维非线性特征,本文应用作者开发的多体接触有限元程序,分析了300MN水压机垫板组力学行为规律,揭示了垫板组加载方式为几何空间状态与力学行为的相关性,说明了垫板组异常变形机制,提出了垫板组设计和使用的几点准则。     

光照与彩陶俑表面色变关系的实验研究

本文以秦彩俑表面色彩为研究对象,通过光照实验与色彩变化的色度测量,分析了光照引起彩俑颜料色变的规律,为秦彩俑这一大型重点文物的色彩保护提供了科学理论依据.     

关于锂原子基态能量的双参数变分计算

采用了双参数变分方法，计算了锂原子的基态能量，其结果较用单参数变分方法在精度上有所提高。