The Bell Curve by Richard J. Herrnstein and Charles Murray Pirated Edition PART 1. THE EMERGENCE OF A COGNITIVE ELITE 1 Cognitive Class and Education, 1900-1990 29 2 Cognitive Partitioning by Occupation 51 3 The Economic Pressure to Partition 63 4 Steeper Ladders, Narrower Gates91 PART 2 COGNITIVE CLASSES AND SOCIAL BEHIOR 5 Poverty 127 6 Schooling 143 7 Unemployment, Idleness, and Injury155 8 Family Matters167 9 Welfare Dependency191 10 Parenting203 11 Crime 235 12 Civility and Citizenship 253 PART 3 THE NATIONAL CONTEXT 13 Ethnic Differences in Cognitive Ability 269 14 Ethnic Inequalities in Relation to IQ317 15 The Demography of Intelligence 341 16 Social Behavior and the Prevalence of Low Cognitive Ability 369 PART 4. LIVING TOGETHER 17 Raising Cognitive Ability389 18 The Leveling of American Education 417 19 Affirmative Action in Higher Education 447 20 Affirmative Action in the Workplace 479 21 The Way We Are Headed509 22 A Place for Everyone 527 APPENDIXES Statistics for People Who Are Sure They Can’t Learn Statistics 553 ù Technical Issues Regarding the National Longitudinal Survey of Youth 569 3Technical Issues Regarding the Armed Forces Qualification Test as a Measure of IQ 579 4 Regression Analyses from Part 2 593 5 Supplemental Material for Chapter 13 625 6 Regression Analyses from Chapter 14 645 7 The Evolution of Affirmative Action in the Workplace655 Notes 665 Bibliography 775 Index 833 some Bigots and Enthusiasts, and through Fear assented to by some wiser and better Men; it is this. They argue against a fair Discussion of popular Prejudices, because, say they, tho’they would be found without any reasonable Support, yet the Discovery might be productive of the most dangerous Consequences. Absurd and blasphemous Notion! As if all Happiness was not connected with the Practice of Virtue, which necessarily depends upon the Knowledge of Truth. EDMUND BURKE A Vindication of Natural Society

技术说明文档：基于分形理论的电树枝物理现象的计算机仿真研究

针对现阶段基于图像检测的板形识别在缺陷的检出率普遍较低以及检测速度慢等问题，文中提出了一种基于计算机图像处理的板形识别系统，其通过直方图均衡化与高帽变换对初始图像进行处理，并通过边缘检测算法提取轮廓，然后利用BP神经网络分类器进行缺陷识别与分类。其在实验及实际工业生产中，均具有较高的识别率，可达到约90%，且还具有较好的板形识别效果。

对流形学习的基本相关概念，流形学习可视化理解，流形学习的常用算法等进行了详细描述

在已知船舶K、T、δ的情况下，根据船舶操纵线性响应方程分析了阶跃操舵、线性操舵下船舶的运动，并将其应用到Z形操舵中，预报了船舶的运动.在小舵角情况下，预报结果与实船测试结果一致.该方法亦可用于鱼雷、潜艇的水平面操纵性预报.

fft快速傅里叶变换蝶形算法详解，非常详细

cad2004绘图形文件、线形，很难收集来的

Delphi中根据分类数据生成树形结构的方法

讲解非常详细，而且很容易理解！！！，并且在课件的后面还附加了课题，可以让你对上面的内容跟熟练。

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