Hadoop

说明：  德卡读卡程序，与D8读卡器相匹配，能够对MIFARE系列的卡进行操作(Deka card reader program, matched with D8 card reader, can operate MIFARE series cards)

hadoop 权威指南，详细介绍了hadoop的工作原理和编程方法(hadoop java c++ work)

说明：  VFP开发的主控程序，其中用了多种方法和技巧实现对用户权限的控制和选择。(VFP development of the control procedures, which use a variety of methods and techniques to achieve competence of the user control and choice.)

此代码是针对数据库教材的源代码，包括求“输入的两个数的最大公约数和最小公倍数”、“输入工资输出工资水平”。程序在Access上得到了验证，也可以移植到其他数据库上。(This code is aimed at teaching book of source code, including database for "input the two Numbers when the largest and smallest LCD", "input output wages." wages Program in the Access is verified, also can be transplanted into other database.)

说明：  此压缩文件包含2002年-2017年200多个地级市资本存量的数据，里面有详细的计算过程与说明。(This document contains the capital stock data of more than 200 cities in 2002-2017, including detailed calculation process and description, which is convenient for scholars to understand and master)

PowerBuilder的一些实例，适合初学者学习使用(Learning source code)

memory mapped noSQL database engine

Handling null fields in SQL queries

数据库功能展示，vc连接access数据库，实现增删查找功能(Database function display, vc connection access database, add or delete search function to achieve)

说明：  小巧的天气预报实时显示系统，采用GDI+技术开发，实现了基本且简单的功能，能在图片上实时显示温度/气温等天气预报情况，并能进行数据的维护更新。小巧的天气预报实时显示系统，采用GDI+技术开发，实现了基本且简单的功能，能在图片上实时显示温度/气温等天气预报情况，并能进行数据的维护更新。(compact real-time weather display system using GDI technology development, achieve the basic and simple functions, in real-time pictures show that the temperature/weather conditions such as temperature, and for the maintenance and update of data. The compact, real-time weather system, using GDI technology development, achieve the basic and simple functions, in real-time pictures show that the temperature/weather conditions such as temperature, and for the maintenance and update of data.)