RS(10,8)编码器的FPGA实现

RS码是一类重要的线性分组码,具有很强的纠错能力,被广泛地应用于各种现代通信系统中.本文在分析有限域运算的基础上,设计了一种能纠正一位错误的RS(10,8)编码器,并给出了FPGA实现过程.     

乘法游戏教学实例分析与应用策略探研

在数学教学中应用游戏教学法,可以让学生真正感受到数学学习的乐趣与魅力,激发学生的学习兴趣,活跃课堂气氛,达到更好的教学效果。在数学乘法教学中,教师应通过小组讨论强化学生记忆,创设趣味教学情境,激发学生兴趣,注重能力培养,促进学生素质提高,并以生为本,关注学生实际,使学生更好地掌握数学知识。     

Strategic development of multiplication problem solving: Patterns of students' strategy choices

Low mathematics achievement is a persistent problem in the United States, and multiplication is a fundamental area in which many students manifest learning difficulties. This study examined the strategic developmental levels of multiplication problem solving among 121 elementary school students in Grades 3 through 5. A latent class analysis modeling was used to identify three valid groups representing different patterns of strategy choices for each of three types of multiplication problems. Findings indicated intra-group variability for problem-solving accuracy, for frequency of using different strategies, and for accuracy of executing direct retrieval/algorithm (DR/AG) strategies. Students demonstrated relative consistency in their strategy choices for solving the three problem types. Students who used DR/AG strategies most frequently showed the highest problem-solving accuracy and the highest accuracy of executing the DR/AG strategies. Students who most frequently relied on incorrect operations or who indicated they did not know how to solve problems demonstrated the lowest problem-solving accuracy among the three groups; the number of students in this group increased with problem difficulty levels. Implications are discussed in terms of identifying students' strategic developmental levels and providing differentiated instruction based on the identified levels.     

椭圆曲线上的快速算法

点乘是椭圆曲线密码的基本操作,它的主要性能指标是运算高效性。本算法设计灵活,且适应不同应用要求;执行的结果非常高效,适应于大多数椭圆曲线参数。     

关于培育第三部门的思考

改革开放20多年以来,我国经历了由传统的、封闭的农业社会向现代的开放的工业社会转型,在社会主义市场经济体制、民主政治体制已初步建立起来的同时,民间组织也迅速崛起成为独立于政府、企业之外的名副其实的第三部门。对构成现代社会"三足鼎立"的三类实体组织互动关系作初步探讨,旨在说明作为克服"政府失灵"和"市场失灵"的制度创新与组织创新的产物,民间组织必将同政府和企业一起推动我国的经济社会发展。     

关于条件概率的几点注记

给出了条件概率的加法公式，乘法公式和—般的全概率公式。     

论价值观多元化背景下社会主义核心价值体系建构的现实针对性

新世纪新阶段,我国各种思想和价值观念相互交织、相互碰撞、此消彼长,呈现出"一元主导,多元并存"、错综复杂、不断演进的发展态势。价值观多元化在很大程度上给社会主义主导价值体系带来冲击。社会主义核心价值体系的建构对巩固和发展社会主义价值体系的主导地位,巩固全党全国各族人民团结奋斗的共同思想基础,不仅具有深远的历史意义,而且具有极强的现实针对性。社会主义核心价值体系的构建是人民当家作主的体现,更是人民当家作主的必然要求;社会主义核心价值体系的建构是遏制和清除剥削阶级腐朽价值观的历史抉择,是改造传统社会小资产阶级价值观的必要条件,也是民族传统价值观扬弃的正确路径。     

大学校园问题的社会学分析

当代大学的校园矛盾,与社会结构的变迁密不可分。社会转型过程中,由社会分化、就业市场化、价值多元化等所引发的社会矛盾,进入大学校园,导致了今日大学的“校园问题”。     

Laurant展开的技巧

数学物理方法教材只提供复变函数洛朗 (Laurant)展开的基本方法 ,实际将任给复变函数展开成为洛朗级数的过程都比较复杂 .通过深入研究 ,我们发现洛朗展开有一定的技巧性 .我们给出洛朗展开的技巧性方法和用计算机系统来展开的方法     

IMAGE PROCESSING METHOD FOR PHOTOCARRIER SPECKLE FRINGE

In the present paper,a new image processing method for photocarrierspeckle fringe is proposed.A simple and fast filter is designed for different kinds of specklefringe with certain direction to eliminate the speckle effect.Fringe multiplication is carriedout with personal computer.The procedure of photocarrier speckle image collecting,pro-cessing,calculating and verifying is described with a practical example.