成功拉取项目（前端后端都是如此) 前端项目注意依赖下载使用 npm install 或者 yarn install （ Vscode 或者 Webstorm ) 后端项目注意 maven 依赖下载（ IDEA (推荐)或者 Ecplise ) 前端 npm 镜像源建议淘宝镜像源，后端 maven 镜像源推荐阿里云镜像源（非必选，但更换后下载快速) ...

In order to minimize the cost of installation and maintenance, the use of ultrasonic sensor for traffic flow has also been proposed. However, its challenges are the horizontal mount of sensors which ...