蛋白质loop区域闭合数值方法分析与比较

针对蛋白质loop区域的闭合问题,比较分析了两种来源于机器人学的数值方法——循环坐标下降法（CCD）和雅可比矩阵方法,进行了实现并设计实验。在计算时间和闭合效率方面循环坐标下降法要明显优于雅可比矩阵方法,而雅可比矩阵方法则可以较平均地改变每一个二面角值。     

基于ICCE-IC的中国产业发展及减排策略研究

从宏观层面综合评价某一国家或地区的产业碳排放及其影响力,系统地提出产业低碳经济发展策略,已经成为一项关键工作。本文在投入产出模型和生态投入产出模型的基础上,提出了产业碳排放影响力系数-产业影响力系数(ICCE-IC)矩阵理论,根据象限分布将产业划分为高排放/高影响、高排放/低影响、较高排放/高影响、较高排放/低影响、低排放/高影响、低排放/低影响6种类型,并分别界定低碳经济发展策略;利用我国2007年投入产出表和按行业分能源消费量,分析我国43个产业部门二氧化碳排放量的ICCE-IC组合矩阵分布结构,研究和探索既可降低碳排放、又能保持经济稳定增长的产业结构调整策略。     

附加桥壳加工夹具的设计

简要介绍了附加桥壳加工夹具的设计,并利用CATIA三维建模软件进行模拟与仿真操作,使工件在夹具上一次装夹,便完成桥壳所有尺寸的加工。     

Three-dimensional anthropometric analysis: Differences between elite Australian rowers and the general population

Abstract

The aim of this study was to quantify the anthropometric differences between elite senior Australian rowers and the Australian adult population using three-dimensional (3D) whole-body scanning. The dimensions of senior rowers competing at the 2007–2008 Australian Rowing Championships were compared with those of an age-matched sample of Australian adults. Mass, height, and sitting height were measured before the participants underwent a 3D whole-body scan, with lengths, breadths, girths, cross-sectional and surface areas, and volumes extracted from each scan. Differences in means and variability between the two groups were expressed as standardized effect sizes and ratios of coefficients of variation. Heavyweight rowers were generally much larger than the general population in absolute size, with 3D dimensions and height and mass showing the largest effects. In contrast, lightweight rowers were generally similar or smaller in absolute and proportional size. The dimensions of rowers, especially the lightweights, were also generally less variable than those of the general population. The greatest differences between elite rowers and the general population were seen in dimensions that could not be captured without 3D scanning, such as segmental volumes and cross-sectional areas.     

特殊子空间上矩阵方程有解的判定

利用矩阵的广义逆和Kronecker积，给出了矩阵方程AXB=C在中心对称矩阵空间中有解的充要条件.     

基于MATLAB的电路参数影响的分析

电路元件参数的变化会导致电路中各电压及电流的变化，要确定所有的变化关系用手工计算往往比较困难。借助于MATLAB的矩阵运算不仅能获取这些变化关系，而且利用MATLAB的图形功能还能将这些变化关系用曲线描述出来，使其形象直观。     

结构动力响应仿真计算

本文提出了一种新的求解结构动力响应的仿真算法。算法原理基于求解状态方程的增广矩阵法。该算法能够给出精度今人十分满意的计算结果。     

具有泛分解态射的加权 Moore-Penrose 逆

研究了范畴￡中具有泛分解的态射 f pgq?关于对称态射,??的加权 Moore-Penrose 逆,并给出了其存在的充要条件及其表达式.     

农村职业教育与“三农”互动分析

在广大农村全面建设小康社会、推进城乡一体化,关键就是要解决农业、农村、农民即"三农"问题。农村职业教育与农村经济发展有十分密切的联系,在解决"三农"问题,在提高农业产业化水平、加快农村城镇化进程、提高农民收入方面发挥着不可替代的作用。农村职业教育与"三农"互动关系分析,给出二者互动的实质,提出互动关系模型,打破了以往单纯从职业教育或"三农"的角度看问题的框架,具有一定的现实意义。     

多项式最大公因式的数值矩阵求法

求多项式的最大公因式常用分解因式和辗转相除法,分解因式对次数较高的多项式有一定难度,而辗转相除法又比较繁琐,根据矩阵的性质提出了一种求两个及两个以上多项式的最大公因式的方法——数值矩阵法。