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C# 分组查询数据库内容，可将查询条件分组后进行整合查询，有效提升查询性能，本源码仅是提供一种思路，实际应用时，需要对代码进一步完善。

商业源码，友思SCO在线售卡网(.Net开源版) V1.1[Access]-commercial source, the Friends of thinking SCO online Vending Network (. Net revenue version) V1.1 [Access]

对数据的处理，和对具体项目的研发，基于C语言的策划和程序设计-Treatment of data, and research and development for specific projects, based on the C language, planning and program design

三维数据同化中关于背景误差协方差的求解方法(The solution of background error covariance in 3d data assimilation)

说明：  包括跳频通信系统的整个工作流程，调制，跳频，解跳，解调。 忽略同步相关的问题，包括跳频同步，帧同步，定时同步，载波同步等。 其中，调制采用MSK调制方式，解调采用复差分解调方式。(Including the whole work flow of frequency hopping communication system, modulation, frequency hopping, de hopping, demodulation. Ignore the synchronization related problems, including frequency hopping synchronization, frame synchronization, timing synchronization, carrier synchronization and so on. Among them, MSK modulation is used for modulation and complex differential demodulation is used for demodulation.)

说明：  惯性导航+DVL的组合导航算法，采用四种融合方法（参考文献在附主代码）。包括仿真数据的产生与信息融合部分。(Inertial navigation and Doppler velocity log integrated navigation algorithm, adopt four fusion methods (references are attached to the main code ). It includes the generation of simulation data and information fusion.)

说明：  2007年硕士论文，基于混沌的数字图像和视频加密算法研究(Master' s thesis in 2007, based on the chaos of the digital image and video encryption algorithm)

扫雷游戏在vc++下的源代码，对C++初学者会有很大帮助-Mine game under vc++ source code, for C++ will be of great help for beginners

提供两个函数专门对powerbuidler10生成的交叉报表进行表格画线,达到正常自由表格式线条效果.-provide two specialized function powerbuidler10 generation of the intersection statements form line drawing achieve normal free format lines results.

说明：  我们在整个游戏中，看到的所有内容，我们都理解为游戏对象。 那么每一个游戏对象，都是由一个单独的类创建而来。 为了便于我们程序的可扩展性，减少冗余代码，我们写一个父类，让这些游戏对象的子类 来继承我的父类，我在父类中，将子类中所共有的成员全部都封装起来。 应该记录游戏对象的横纵坐标 需要记录游戏对象的高度和宽度(All the content we see in the whole game is understood as the object of the game. Then every game object is created by a separate class. In order to facilitate the scalability of our program and reduce redundant code, we write a parent class to let the children of these game objects. To inherit my parent class, I encapsulate all the members that are common in the subclass. The abscissa and ordinate coordinates of the game object should be recorded You need to record the height and width of the game object)