A Design and Implementation of The Online Shopping System Abstract: Along with the development of the computer ,the database technique is widespread in the application of Internet, more and more , providing more thoughtful and humanized service

模拟地震记录，用的是雷克子波，模拟亮点响应，里面含有五种岩性，四个反射界面-Analog seismic records, using a Ricker wave simulation highlights the response, which contains five kinds of rock, four reflective interface

反射式血氧（SPO2）计算，包括基线滤波，脉搏波特征点提取，R值计算，可移植到单片机（STM32）-Reflective oximetry (SPO2) calculations, including baseline filtering, pulse wave feature point extraction, R value calculation, can be transplanted to the microcontroller (STM32)