java开发，30个常用工具类总结，全部来自项目实践中用到的工具类：dateUtils、StringUtils、CalendarUtils、FileUtil、RandomUtil等

包括行政边界、建筑物、路网、河流、交通点等信息，从OSM上下载的。上传资源想免费的，但是好像只能选择最少1积分。有需要可以自行下载，也可以从OSM自行下载~

来自麻省理工的正则化最小二乘法讲义，讲得精炼而且较为易懂！

这是一篇来自science杂志的论文，非常经典！介绍了测地距离在流行降维中的应用。 Scientists working with large volumes of high-dimensional data, such as global climate patterns, stellar spectra, or human gene distributions, regularly confront the problem of dimensionality reduction: Þnding meaningful low-dimensional structures hidden in their high-dimensional observations. The human brain confronts the same problem in everyday perception, extracting from its high-dimensional sensory inputsÑ30,000 auditory nerve Þbers or 106 optic nerve ÞbersÑa manageably small number of perceptually relevant features. Here we describe an approach to solving dimensionality reduction problems that uses easily measured local metric information to learn the underlying global geometry of a data set. Unlike classical techniques such as principal component analysis (PCA) and multidimensional scaling (MDS), our approach is capable of discovering the nonlinear degrees of freedom that underlie complex natural observations, such as human handwriting or images of a face under different viewing conditions. In contrast to previous algorithms for nonlinear dimensionality reduction, ours efÞciently computes a globally optimal solution, and, for an important class of data manifolds, is guaranteed to converge asymptotically to the true structure.

来自国外的一款超牛免杀远程控制，采用C++编程技术，【支持全部WIN系统上线】 ，主控端和服务端完全免杀国内主流杀软

为了做分类信息，从58那里辛苦复制粘贴来的全国省市数据，包含了各个省，市，地区，希望对需要的程序员有用，阿门

拱桥：悬链线坐标计算程序，计算坐标值！只要有参数就可以了，非常不错偶！

朴素贝叶斯算法（C语言实现）（来自网络）

chi_sim.traineddata 从github仓库下的， https://github.com/tesseract-ocr/tessdata_fast,可以自己上去下，不过它需要才能单独下，不然你就慢慢把整个仓库下下来。大小40多M，识别率比17M的强大

包含原作者所有四个commit中前三个的完整信息，便于大家研究历史。 最后第四个commit是添加README.md，我直接把文件放入。 原作者第四个commit的时间是 Wed Feb 7 16:08:42 2018 +0100 9d6c4c282c8ac00cf8a28537e3680d1aefc65165 iBoot_Github.tgz 找了一晚上，比普通的zip包信息全。