数字罗盘HMC5883L的LPC1769

在电压过零点触发或截至可控硅的导通或闭合；有效通断电压；应用稳定可靠；-Triggering voltage zero-crossing point or at the turn-on SCR or closed the effective on-off voltage application of stable and reliable

在keil编程软件上实现对数码管的检测，P1口接数码管，500ms的间隔时间逐个点亮。

应用背景 Fifty Years of Shannon Theory： A brief chronicle is given of the historical development of the central problems in the theory of fundamental limits of data compression and reliable communication. 关键技术Shannon’s A mathematical theory of communication”published in July and October of 1948 is the Magna Carta of the information age. Shannon’s discoveryof the fundamental laws of data compression and transmission marks the birth of Information Theory. A unifying theory with profound intersections with Probability, Statistics, Computer Science, and other fields, Information Theory continues to set the stage for the development of communications, data storage and processing, and other information technologies.

线性方程组的两个程序，Guass－Jodan消去法和的，高斯塞德尔迭代法。-linear equations of the two procedures, Guass- Jodan elimination and the high Shisaideer iterative method.

建立一个排序二叉树-establish a ranking Binary Tree

四方定理描述： 在数论中有一个著名的“四方定理”，它的含义是： 所有自然数至多只要用四个数的平方和就可以表示。 要求： 该题是一个定理，我们不是去证明它，而是要求同学们编程 序来验证该定理的正确性。 输入： 用户从键盘任意输入一个自然数。 输出： 给出满足四方定理中的至多四个自然数。-Quartet theorem Description : Number Theory in a famous "Quartet Theorem," meaning it is : all natural number can use up to four the number of square and can be expressed. Requirements : The title is a theorem, we will prove it, but to require the students programmed to verify the correctness of the theorem. Input : arbitrary user input from the keyboard to a natural number. Output : the Quartet is to meet the theorem up to four natural number.

实现时间序列建模的marple算法，具体操作程序里有提示-Achieve time-series modeling marple algorithm, specific procedures have prompted

Calculadora booleana desarrollada en el 讲串口 utilizando el pic 16F887A

一个用来计算每年1月1号星期几的c小程序！实现比较简单，其实就是计算闰年的小程序，不过小程序可能有点小bug，希望大家包含！-one used to calculate the annual January 1 several weeks of c small program! Achieving a relatively simple calculation of leap year is actually a small, but a small program might have a small bug, we hope that contain!

php上传图片文件，多种格式，可显示是否上传成功，可以预览图片效果，直接在浏览器里输入Url，即可操作。up.phpup2.php，提供文件上传到哪个路径，可查看。