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采样率小于一个连续时间信号最大频率的2倍时就叫undersampling，欠采样，根据抽样定理，当fs>=2fmax，也就是oversampling，过采样时，数字信号才能重建成原来的模拟信号，欠采样重建会发生混叠-Sampling rate of a continuous-time signal is less than the maximum frequency of 2 times is called undersampling, bandpass sampling, according to sampling theorem, when fs

本文结合555Datasheet，图文并茂地的介绍了如何阅读集成电路的Datasheet-555Datasheet this paper, the illustrations of how to read IC Datasheet

简易无线电遥控系统利用高频载频信号将调制信号经由发射端天线送出，在接收端经接收天线接收，再经过解调和解码恢复原信号用来控制发光二极管的亮灭。-Simple radio-controlled system uses high-frequency modulated carrier frequency signal to the antenna signal sent by the transmitter, the receiver antenna by the receiver, after demodulation and decoding to restore the original signal used to control the light to eliminate light-emitting diodes.

AVI作为一种常用文件格式，这是AVI文件格式的详细介绍-AVI as a common file format, which is the AVI file format detailed

3COM的使用和帮助文件，是将交换器的说明，图例集全。-3COM use and help files is to exchange the note Figure throughout.

OpenCV 4下的图像变换，可以进行图像的旋转操作。-OpenCV 4 transform the image, the image can operate rotation.

dxf2000的数据格式，从国外网站下载的-dxf2000 data formats and downloaded from the web

学术论文的撰写规范与要求. 希望帮助大家完成标准的论文写作.-academic writing norms and requirements. We hope to help complete the standard of academic writing.

详细描述关于U盘的文件系统的开发，资料绝对很有用-write up flash disk file system developing,it is very useful for you.

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