ti-idf算法，实现对英文文档的检索，把多篇文档中的词（英文单词），按照权值从小到大进行排列-ti-idf算法

收集的SPI文档，有些老了，有新版本的请通知一下，我下好重新放上去。。以下为凑50字内容。

互联网搜索引擎课设二部分

The topic of this article, the singular value decomposition, is one that should be a part of the standard mathematics undergraduate curriculum but all too often slips between the cracks. Besides being rather intuitive, these decompositions are incredibly useful. For instance, Netflix, the online movie rental company, is currently offering a $1 million prize for anyone who can improve the accuracy of its movie recommendation system by 10%. Surprisingly, this seemingly modest problem turns out to be quite challenging, and the groups involved are now using rather sophisticated techniques. At the heart of all of them is the singular value decomposition. A singular value decomposition provides a convenient way for breaking a matrix, which perhaps contains some data we are interested in, into simpler, meaningful pieces. In this article, we will offer a geometric explanation of singular value decompositions and look at some of the applications of them.

3.0版本的官方文档资源，比较全，不需要到处找了

Percona Toolkit 3.2 官方英文文档 Percona Toolkit 是一组高级的命令行工具，用来管理 MySQL 和系统任务，主要包括： 验证主节点和复制数据的一致性 有效的对记录行进行归档 找出重复的索引 总结 MySQL 服务器 从日志和 tcpdump 中分析查询 问题发生时收集重要的系统信息

苹果登录Sign in with Apple官方文档说明

这是一篇关于 步进电机加减速的 文档及代码，有较高的参考价值 纯c代码方便移植，亲测可用，有需要欢迎交流

spring-boot 2.6.3官方英文文档：spring-boot-reference.pdf

vivado fft ip核 V9.1版本，英文官网手册