C #写网络五子棋，可以实现双人对弈，聊天功能

Qt4数据库应用-东软培训资料，对初学者很有用。这是第四部分。(Qt4 database applications- Neusoft training materials, useful for beginners. This is the fourth part.)

说明：  手机AT modem的处理流程,包含at 命令的读取,解析和编码(Mobile phone AT modem processing process, including at command reading, parsing and coding)

用哈夫曼算法对图像进行压缩， 1.颜色模式转换及采样； 2．DCT变换（离散余弦变换）； 3．量化；4．编码（有算术编码和哈夫曼编码两种，这里采用哈夫曼编码）

【实例简介】

HMC5883L STM32驱动代码，采用I2C总线进行通信的。(HMC5883L STM32 driver code, using the I2C bus communication.)

基于STM32F4的四轴航拍平台。以STM32F407为控制核心，四轴飞行器为载体，辅以云台的航拍系统。硬件上由飞控电路，电源管理，通信模块，动力系统，机架，云台伺服系统组成。算法上采用简洁稳定的四元数加互补滤波作为姿态解算算法，PID作为控制器，实现飞行，云台增稳等功能(Four axis aerial platform based on STM32F4. Taking STM32F407 as the control core, the four axis flying vehicle as the carrier, and the aerial camera system with ptz. The hardware is composed of flight control circuit, power management module, communication module, power system, frame and PTZ servo system. The algorithm uses a simple and stable four yuan number plus complementary filtering as the attitude calculation algorithm, and PID is used as a controller to achieve flight, PTZ stability, and other functions)

SERPSK SERPAM SERQAM

电梯：

说明：  地形渲染，使用OPENGL 和 C++，使用ROAM经典算法，LOD算法化简提高效率,完成对场景的浏览。(Rendering, use the OPENGL and C++, using the classical algorithm ROAM, LOD algorithm is simplified to improve efficiency, complete view of the scene.)