Jacobi与Gauss—Seidel迭代法求解线性方程组收敛性比较与研究

Jacobi迭代法和Gauss-Seidel迭代法是计算机求解线性方程组常用的两种迭代法,但是这两种方法对方程的收敛性要求很严,大部分方程组均不能用以求解.给出一些基本技巧:对于简单的2阶方程组,若Jacobi法与Gauss-Seidel法均发散,可交换其两行求得其解;对一般性方程,给出一个应用性较强的定理,将方程Ax=b ATAx=ATb,可以用Gauss-Seidel求得任何｜A｜≠0方程组的解.     

范德瓦耳斯气体的临界指数β=1/3

从范德瓦耳斯气体的对比态方程出发,推导出临界指数的数值为1/3,与实验值相近。     

中立型泛函微分方程正周期解的存在性

应用锥上不动点理论讨论了一类包含许多时滞人口模型的泛函微分方程的正周期解的存在性.     

新时期高校档案的服务创新

新形势下高校档案服务社会化全面展开，促使高校档案馆必须树立新的服务理念，创新服务模式，改进服务手段，革新评价体系。本文基于高校档案管理服务创新理念，提出档案服务创新方法，用服务质量评估衡量高校档案服务是否到位，促进高校档案馆合理生存，顺向发展。     

Idea generation in biomedical engineering courses using Design Heuristics

ABSTRACT

With increasing demand for improved medical equipment and healthcare, next-generation biomedical engineers need strong design skills. Equipping biomedical engineering students with tools for idea generation and development can increase student design success. Design Heuristics are an ideation tool developed through empirical studies of product designs. While identified in the mechanical engineering space, Design Heuristics may be applicable in biomedical engineering design. In our study, we implemented a Design Heuristics session during upper-level undergraduate and first-year graduate biomedical engineering design courses. We examined the applicability of Design Heuristics within individual and team concept generation contexts. The findings demonstrated that biomedical engineering students were able to use Design Heuristics to generate multiple concepts, and that initial concepts produced using Design Heuristics were carried over into final team design. The results support the applicability of Design Heuristics to student idea generation in biomedical engineering design.     

The effect of television viewing on ethnic prejudice against immigrants: A study in the Italian context

Television viewers construct many different meanings from the programs they watch. Here, we investigated whether ethnic prejudice is differentially influenced by the genre of television programs in their portrayal of ethnic minorities. We also wanted to determine whether a higher educational level reduces ethnic prejudice and television use. A self-reported questionnaire was administered to 401 Italian adults. Structural equation modeling was used to analyze the relationships between ethnic prejudice and television program contents and educational level. Viewing Reality and Variety Shows was positively related to ethnic prejudice, News and Public Affairs was negatively related, and Films and TV series had no apparent influence on prejudice. Educational level was negatively related to both ethnic prejudice and watching Reality and Variety Shows, and positively related to viewing News and Public Affairs and Films and TV series programs.     

延安精神对高校思想政治理论课教育教学的启示

延安是中国革命的圣地和新中国的摇篮,也是中国共产党人的精神家园。中国共产党不仅在延安时期实现了马克思主义中国化的第一次历史性飞跃,确立了毛泽东思想的指导地位,而且培育和形成了伟大的延安精神。在党和国家高度重视大学生思想政治教育、进一步加强和改进高校思想政治理论课教育教学的新形势下,弘扬延安精神既是思想政治理论课教育教学的重要内容,也对高质量地开展思想政治理论课教育教学具有深刻的启示和方法论指导。     

一类时滞双曲型微分方程系统的振动性

建立了一类具有连续分布滞量的双曲型微分方程系统解的振动的若干充分条件 ,并对主要结果举例说明     

Zui说上善门－《清明上河图》答问

《清明上河图》中的城门楼，是该图形象体系的组成部分；它是对生活真实的艺术反映，而不是对北宋东京外城上那座上善门的机械摹写。“上善”一词典出《老子》，体现了道家的比德观念。宋太宗以“上善”为城门赐名，主要出于宗教观念。     

"先富"带"共富"仍然是社会主义初级阶段的主导思想

近期部分收入差距拉大的问题引起人们的普遍重视，有的人甚至认为邓小平同志的“先富”带共富的思想过时了甚至失误了。笔者认为，邓的这一思想并没过时，仍然社会主义初级阶段的主导思想。目前的部分收入差距过大现象的产生有其客观现实的原因，与邓小平同志的“先富”带“共富”的思想并没有直接的因果关系。