数值分析用抛物线y=a+bx+cx 拟合给定数据

calc大数库，实现了所有的基本大数运算功能-calc library of large numbers, realize all the basic computing functions of large numbers

大学里必学的一门课程，数值分析的一个必做的程序，拉格朗日一次插值-universities will learn a curriculum, a numerical analysis of the process will do, Lagrange interpolation.

LEACH算法是一种无线传感器网络路由协议,leach协议算法基本思想是:以循环的方式随机选择簇头节点，将整个网络的能量负载平均分配到每个传感器节点中，从而达到降低网络能源消耗、提高网络整体生存时间的目的。仿真表明，与一般的平面多跳路由协议和静态分层算法相比，LEACH分簇协议可以将网络生命周期延长15%。

小四轴的源码以及原理图    #include "led.h"#include "delay.h"#include "sys.h"#include "key.h"#include "usart.h"#include "exti.h"#include "wdg.h"#include "timer.h"#include "pwm.h"#include "lcd.h"#include "MPU6050.h"#include "lsm330.h"u8 SPI1_Buffer_Rx1[6]="432423";s16 SPI1_Buffer_Rx[30];u8  k = 0;void SPI_Configuration(){ SPI_InitTypeDef   SPI_InitStructure;   /* SPI1 Config -------------------------------------------------------------*/  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;  SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;  SPI_

二维屏幕上表现三维点的绘制方法――适合图形编程的数字运算方法原理-2D screen performance 3D Rendering point-- suitable for graphical programming method of calculation principle

学编程没多久，没事写着连习。-school program not long, with nothing to read even Xi.

Lacoally weighted Regression source code

1．简介 本程序是用纯C语言编的一个基于菜单命令行的数据库系统。可以创建多个数据库，数据库表，字段。其中字段的类型只能为整形，浮点型，字符型和字符串型（最大长度确定，不能改变）。 2．功能 a)数据库存储： 一个数据库存储于一个文件中，打开文件将数据库载入到内存。 保存时将内存中数据重新写到文件中去。 b)数据库管理： 提供数据库的创建，表的创建，字段的创建 提供对数据的查询，删除，修改，排序功能 c)支持SQL部分语句： 支持SELECT 和DELETE语句-1. Introduction of this program is pure C language based on a series of menu command-line database system. You can create multiple databases, database tables, fields. The type field which can only plastic, floating point, character and string (maximum length and can not be changed). 2. A function) database storage : a database stored in a document, the document will open the database to include memory. When will preserve memory data re-wrote a document. B) database management : to provide database creation, table creation, the field for the creation of data inquiries, delete, modify, sequencing feature c) some support SQL statement : support DELETE and SELECT statements

《算法和复杂度》（英文版）-"algorithms and complexity" (English version)