DHT22_AM2302_STM32F103驱动，保证可用，程序完整，内含精准delay

Allegro 软件Pin Delay 导入导出及校验方法介绍

使用GGOS对流层产品解决对流层延迟的C项目 该项目原始路径为：E：\ Thesis \ RTKLIB_Workspace \ WorkSpace \ For_Thesis \ For_Thesis项目名称为For_Thesis（即= $ ============程序主要功能==============本程序的主要功能是基于GGOS对流层产品进行对流层延迟解算，并使用rtklib开源项目的二次开发及改进。是方便其他使用rtklib开源项目的GNSS研究者，提高其科研效率。基于rtklib2.4.3 b33版本进行二次开发，采用C语言编写，并在Win10，Visual Studio 2017平台上完成开发及调试，项目路径为：E：\ Thesis \ RTKLIB_Workspace \ WorkSpace \ For_Thesis \ For_Thesis分数于原项目，主要目标点为：1.增加

switch_delay_interrupt.c

tm4c123x入门LED switch_delay代码

时滞系统稳定性必备书That every problem in NP can be polynomially reduced to an NP-hard problem suggests a proof for NP-hardness. It follows that if a problem ℘1 is NP-hard and polynomially reducible to some problem ℘2, then ℘2 must also be NP-hard. In other words, if one is to prove that ℘2 is NP- hard, one may attempt to reduce polynomially a known NP-hard problem ℘1 to ℘2. In particular, it suffices to polynomially reduce ℘1 to just one instance of ℘2, since that particular instance of ℘2 is as difficult as any instance of ℘1, and therefore in the worst case, ℘2 must be as difficult as ℘1. A vast number of NP-hard and NP-complete problems have been discovered in this manner, among them notably are such classical problems as the satisÞability problem and the traveling salesman problem. The same strategy is adopted in our proof of the NP-hardness of the stability problem

STM32F103ZET6的毫秒和微妙的实现（参考多个大牛的程序，上传只为记录）

基于STM32的DHT22温湿度采集，附件程序文件，也适用于DHT11、DHT21模块

STC15系列万能delay延时。为了方便51单片机在不同晶振频率下，延时函数能正常使用而打包的延时函数。改变频率后只需改变一下宏定义即可。 delay.h #ifndef _DELAY_H #define _DELAY_H //注意时钟频率设置正确 //------------------------------------------ //晶振 #define xtal_0 5529600L //05.5290MHz #define xtal_1 6000000L //06.0000MHz #define xtal_2 8000000L //08.0000MHz #define xtal_3 11059200L //11.0592MHz #define xtal_4 12000000L //12.0000MHz #define xtal_5 18432000L //18.4320MHz #define xtal_6 22118400L //22.1184MHz #define xtal_7 24000000L //24.0000MHz #define xtal_8 27000000L //27.0000MHz #define xtal_9 30000000L //30.0000MHz #define xtal_10 33000000L //33.0000MHz #define xtal_11 33177600L //33.1776MHz //----------------------------------------- //时钟配置 #define OSC xtal_3 //晶振频率 void delay_us(unsigned int _us); //1us void delay_50us(unsigned int _50us);//50us void delay_ms(unsigned int _ms); //1ms void _1ms(); void _50us(); void _1us(); #endif

C# 查询SQLSERVER千万笔海量资料表不delay,含设计源码与范例.用分批捞资料给DataSet,用DataGridview来显示,一般会用Select Top ..Not In ..来分批,资料越大,效果越不好,其实修正一下语法,效果大大不同,省时又快速。