Stability and Accuracy Analysis for Taylor Series Numerical Method

The Taylor series numerical method (TSNM) is a time integration method for solving problems in structural dynamics. In this paper, a detailed analysis of the stability behavior and accuracy characteristics of this method is given. It is proven by a spectral decomposition method that TSNM is conditionally stable and belongs to the category of explicit time integration methods. By a similar analysis, the characteristic indicators of time integration methods, the percentage period elongation and the amplitude decay of TSNM, are derived in a closed form. The analysis plays an important role in implementing a procedure for automatic searching and finding convergence radii of TSNM. Finally, a linear single degree of freedom undamped system is analyzed to test the properties of the method.     

A Constrained Interval-Valued Linear Regression Model: A New Heteroscedasticity Estimation Method

Linear regression models for interval-valued data have been widely studied. Most literatures are to split an interval into two real numbers, i.e., the left- and right-endpoints or the center and radius of this interval, and fit two separate real-valued or two dimension linear regression models. This paper is focused on the bias-corrected and heteroscedasticity-adjusted modeling by imposing order constraint to the endpoints of the response interval and weighted linear least squares with estimated covariance matrix, based on a generalized linear model for interval-valued data. A three step estimation method is proposed. Theoretical conclusions and numerical evaluations show that the proposed estimator has higher efficiency than previous estimators.

     

结构必要联系的研究与应用

论述结构中必要联系的性质.通过对工程实际问题的分析，指出正确运用这些性质来处理一些丁程问题是十分重要的。     

加快档案信息自动化建设

对提高档案管理人员的素质、加快档案信息自动化建设的各项工作作简单介绍,并提出个人的一些体会及建议。     

加快档案信息自动化建设

对提高档案管理人员的素质、加快档案信息自动化建设的各项工作作简单介绍,并提出个人的一些体会及建议。     

空间铰接链杆体系几何组成性质分析的解析方法

采用解析方法．通过对结点位移性质的论证，提出了空间铰接链杆体系几何组成性质分析的解析方法．用此方法来分析网架、塔架及类似空间结构的几何组成，将会有十分有益的工程意义．     

结构力学课程建设与教学改革的研究

介绍了房屋建筑工程专业结构力学课程教学的基本要求、基本方法、教材与试题库建设、计算机应用等课程建设与教学改革方面的研究成果。     

加快档案信息自动化建设

对提高档案管理人员的素质、加快档案信息自动化建设的各项工作作简单介绍,并提出个人的一些体会及建议.     

Numerical Simulation and Analysis of Residual Stress in Machine Tool Bed Casting

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压铸充型过程模拟并行搜索算法

压铸过程充型模拟技术存在的主要问题之一是迭代过程缓慢而导致计算效率较低。该文通过对压铸充型的数学模型和计算模型进行分析 ,利用机群计算平台 ,提出并建立了一种并行搜索计算模型。该模型在原有串行算法的基础上 ,通过效率参数的适当选择和调整 ,实现了利用并行计算优化串行过程的目的。这种算法可以充分发挥各个结点的计算能力 ,有效降低结点之间的通信时间。通过对实际压铸零件进行的计算测试表明 ,该算法在保证原有计算精度的前提下 ,可以在一定范围内极大地提高计算效率。