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超声波测距，测量精度为1cm，可以使机器人安全避障。(Ultrasonic distance measurement accuracy of 1cm, can make the robot obstacle avoidance safety.)

好的声文同步程序，值得学习，适合于初学者，给大家共同分享(Good sound text synchronization process, it is worth learning, suitable for beginners, for everyone to share)

marmousi模型的sgy数据体，地震偏移成像必备模型，本模型的sgy格式支持有/无卷头微机和有卷头工作站格式，欢迎广大地震工作者下载(This is the Marmousi model in sgy format,which is essential for Seismic migration imaging.)

双馈风电机组的PSCAD模型，是通用模型，有助于帮助解决双馈风电机组建模问题(PSCAD doubly-fed motor model)

GPS导航系统 c语言 51单片机开发(in-vehicle GPS navigation system)

单片机常用芯片手册,非常实用,初学者适合(Commonly used single-chip chip manual, very practical, suitable for beginners)

显示器功能 加快程序开发初学者的进步脚步。让他们了解简单的显示程序的写法(Monitor function to accelerate the pace of progress in program development for beginners. So that they understand the simple display program wording)

MultiThread DB - ADO CMTDaoDatabase CMTDaoRecordset

在单片机上运行的简单的颜色跟踪算法,中文注释(Running on the microcontroller simple color tracking algorithm, Chinese Notes)

步进电机是将电脉冲信号转变为角位移或线位移的开环控制电机，是现代数字程序控制系统中的主要执行元件，应用极为广泛。。在非超载的情况下，电机的转速、停止的位置只取决于脉冲信号的频率和脉冲数，而不受负载变化的影响，当步进驱动器接收到一个脉冲信号，它就驱动步进电机按设定的方向转动一个固定的角度，称为“步距角”，它的旋转是以固定的角度一步一步运行的。可以通过控制脉冲个数来控制角位移量，从而达到准确定位的目的；同时可以通过控制脉冲频率来控制电机转动的速度和加速度，从而达到调速的目的。(Stepper motor is an open loop control motor which transforms electrical pulse signal into angular displacement or linear displacement. It is the main executive element in modern digital control system, and is widely applied. In the case of non overloaded, the motor speed and stop position depends only on the pulse frequency and pulse number, regardless of load changes, when the stepper driver receives a pulse signal, it drives stepper motor to set the direction of rotation of a fixed angle, called "step", it is the rotation of the fixed point of the operation step by step. We can control the angular displacement by controlling the number of pulses, so as to achieve the goal of accurate positioning. At the same time, we can control the speed and acceleration of motor rotation by controlling the pulse frequency, so as to achieve the purpose of speed regulation.)