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tf–idf, short for term frequency–inverse document frequency, is a numerical statistic that is intended to reflect how important a word is to a document in a collection or corpus.[1]:8 It is often used as a weighting factor in information retrieval and text mining. The tf-idf value increases proportionally to the number of times a word appears in the document, but is offset by the frequency of the word in the corpus, which helps to control for the fact that some words are generally more common than others. Variations of the tf–idf weighting scheme are often used by search engines as a central tool in scoring and ranking a document s relevance given a user query. tf–idf can be successfully used for stop-words filtering in various subject fields including text summarization and classification. One of the simplest ranking functions is computed by summing the tf–idf for each query term many more sophisticated ranking functions are variants of this simple model.

图片处理程序:仿windows画图，画矩形、画圆形、箭头、画笔、裁剪、缩放和旋转。(Picture Processing Program: Imitate windows drawing, draw rectangle, circle, arrow, brush, clipping, zooming and rotation.)

这是一个基于Linux平台开发的2410-LED驱动程序(This is a Linux-based platform developed 2410-led driver)

程序中含有各种排序算法，包括了数据结构的常见算法，在处理一些排序的问题时由很大帮助(the program has several sort methods which are useful in solving problems.)

地球物理科学中的SEGY地震数据文件格式转换程序(Geophysical science SEGY seismic data file format conversion process)

EVC---WM服务程序编写，开机自动运行(EVC--- WM services, programming, start to run automatically)

电位移控制台介绍和详细说明介绍了各种型号和实验(The electric displacement console and detailed description of the various models and experimental)

说明：  Windows - IoT - Core - Graphics - Library - master

枚举当前系统中所有的已经安装的设备！ 原创呀！(All has been installed in the enumeration of the current system of equipment!)

进程的创建与撤销，能在VC6.0中运行，简单的学习进程的创建与撤销相关内容(Creation and revocation of the process can be run in VC6.0, the creation of simple learning process and revocations)