超声波测距的原理图。9个按键，一个液晶。

零耗时低频宽脉冲软PWM信号控制C51演示程序-zero time-consuming low-bandwidth pulses soft PWM control signal C51 Demonstration Program

无线传感器网络（wireless sensor network , WSN）就是由部署在检测区域内大量的廉价微型传感器节点组成，通过无线通信的方式形成的一个多跳得自组织的网络系统，其目的是协作地感知、采集和处理检测区域的信息，并报告给基站[1]。-Wireless sensor networks (wireless sensor network, WSN) is deployed in the region detected a large quantity of cheap micro-sensor nodes through wireless communications, the formation of more than one way to jump self-organizing network with the aim of collaboration and awareness, Detection of regional collection and processing of information, and report to the base station [1].

吉林大学的 dsp ppt教程，适合初学习dsp的人。-Jilin University of dsp ppt tutorials, suitable for early learning dsp people.

通过一句 的问答方式，详细讲解了LINUX的一些操作。-through one ask after one ask ,insight the operation of linux system.

这是一个lm339资料，希望能对你有所帮助。-This is a LM339 in the hopes of your help.

a pictures for desktop

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this a java example,it is concernging array instance,give some different type form-this a java example, it is concernging array instance, give some different type form

包括了java的基本函数的用法，方便查询！-including the basic function of usage, to facilitate inquiries!

游戏策划文档,可以作为设计游戏时的参考。-game design document