快速作文教学与传统作文教学之比较

文章从广东省惠阳市快速作文课堂训练十步法（ 简称“十步法”） 为例,分别从教学思想、教学目标、教学手段和教学效果四个方面与传统作文教学相比较。通过比较,消除对快速作文教学产生的误解,提高对快速作文教学的认识,把握好快速作文教学的方法,提高快速作文教学的水平     

Parallel computation approaches for flexible multibody dynamics simulations

Finite element based formulations for flexible multibody systems are becoming increasingly popular and as the complexity of the configurations to be treated increases, so does the computational cost. It seems natural to investigate the applicability of parallel processing to this type of problems; domain decomposition techniques have been used extensively for this purpose. In this approach, the computational domain is divided into non-overlapping sub-domains, and the continuity of the displacement field across sub-domain boundaries is enforced via the Lagrange multiplier technique. In the finite element literature, this approach is presented as a mathematical algorithm that enables parallel processing. In this paper, the divided system is viewed as a flexible multibody system, and the sub-domains are connected by kinematic constraints. Consequently, all the techniques applicable to the enforcement of constraints in multibody systems become applicable to the present problem. In particular, it is shown that a combination of the localized Lagrange multiplier technique with the augmented Lagrange formulation leads to interesting solution strategies.     

篮球防守快攻教学初探

随着篮球比赛速度的加快,快攻战术配合的成功率日显重要,但在日常教学中常常只重视进攻战术而忽视防守战术的教学与训练。文章运用文献资料的研究方法,为达到篮球运动的攻守均衡,应将防守快攻战术的思想和方法贯穿于教学之中,使学生掌握防守快攻战术的方法,并会在比赛中合理运用。     

遗传算法的研究与发展动向

遗传算法是建立在自然遗传学机理基础上的参数搜索方法，在许多优化问题中都有成功的应用。本文介绍了GA的思想来源及基本原理，理论研究状况，提高收敛速度的策略及其发展新动向，同时比较了GA与其它人工智能技术。     

在桌面虚拟化系统中实施国产密码算法

在分析现有主流桌面虚拟化方案的基础上,综合考虑中国在通信安全方面的法律要求,对虚拟桌面传输协议的特性进行分析与总结,同时对KVM方案的SPICE协议进行基于国产密码算法的安全性改造.通过在OpenSSL中添加国产密码算法SM3/SM4,用以替换SPICE协议中SSL使用的SHA1/AES算法,提供机密性和完整性保护.实验表明,该方案不仅能保证传输的安全性,同时能保持其性能,推广了国产密码算法的应用,符合国家相关管理条例.     

Une introduction non classique aux algorithmes d'addition et de soustraction

The aim of our study was to analyze a didactical sequence for the teaching of addition and subtraction procedures and algorithms. In the conception of that sequence, we have taken into account diagnostic and repair models for procedural bugs in addition and subtraction algorithms, as well as learning and teaching methods for multi digit additions and subtractions. The didactical sequence included situations involving many of the characteristics associated with procedural bugs; however, when the children encountered those situations they had many conceptual tools to detect their mistakes and correct them, giving that way a meaning to the actions made in addition and subtraction procedures and algorithms. Our teaching activities were submitted to second grade school children (7–8 years old). The didactical interactions and the procedures used by children in problem solving activities were analyzed in order to get a better understanding of the interaction between numbers, numeration and operations knowledge which are involved in the construction of addition and subtraction procedures and algorithms and to relate children's knowledge acquisition to the didactical situations. This revised version was published online in July 2006 with corrections to the Cover Date.     

基于约束的图形参数化方法研究

推出了一套几何约束求解的方法。该方法基于对工程图形的理解 ,能自动识别图形的尺寸约束和几何拓扑约束 ,并建立起以节点为核心的几何约束模型和几何约束图 ;然后通过归约算法进行几何推理 ,实现参数化设计 ,大大提高了求解效率     

一种细分格式生成极限曲面的法向量的求法

本文在Levin给出的三角域上生成极限曲面的法向量求法基础上 ,给出拟蝴蝶形细分在矩形域上生成极限曲面的情况 ,并得到了两个自由度 ,可以对法向量进行优化选取 ,这对讨论曲面的等距面有广泛的实际意义     

用快速傅里叶变换计算连续信号的频谱

介绍了按时间抽取的基-2快速傅里叶变换以及它的C语言实现,并进一步探讨了用快速傅里叶变换计算连续信号频谱的方法.     

中国男篮里约奥运小组赛与比赛对手快攻手段运用的对比分析

本文通过对里约奥运会中国男篮与参赛对手在快攻战术中的运用对比分析,重点关注长短传快攻在实际比赛中运用次数的统计、快攻的使用情况、特点及完成率。通过综合分析,找出比赛中快攻运用的最佳时机、成效,找出快攻战术在发动、推进及结束阶段的运用,发现快攻战术起始和结束的节点对于得分的积极促进作用。