c#实现课程笔记管理系统窗体应用程序系统源代码

两份基于51单片机的交通灯，包括原理图，proteus仿真，PCB，实训报告等。是我单片机实训时的成品，调试成功的。(Based on 51 single two traffic lights, including schematics, proteus simulation, PCB, training reports. SCM training when I was finished, debugging success.)

基于STC15F104W与DS18B20的温度采集。用LED小灯输出(Collection based STC15F104W with DS18B20 temperature. Output with LED lights)

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.

STM32 驱动OV7670  代码简单   需要参考引脚设置

一个求多边形面积的程序 也许会对某些人有用(Area of a polygon for the procedure may be useful to some people)

说明：  舵机转动180 直接调用已经封装号函数有dug(Direct Invocation of Steering Engine Rotation 180)

它给我从路由器启动，并显示目的地

说明：  C++ IIR滤波器源代码，速度远高于matlab(C++ IIR filter source code, faster than matlab)

24CXX的读写代码,适用于于51单片机SCM.可直接使用。 (24CXX the read and write code, suitable for 51 MCU the SCM can be used directly.)

a digital phase locked loop