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查询linux系统安装时间ls -lact --full-time /etc | tail -1 | awk ‘{print $6,$7}’

setPreferableBackend和setPreferableTarget环境opencv4.4.0setPreferableBackend()函数原型/** * @brief Ask network to use specific computation backend where it supported. * @param[in] backendId backend identifier. * @see Backend * * If OpenCV is compiled w

ubuntu16.04安装cudnn一、环境操作系统：ubuntu16.04内核：4.4.0-98-genericnvidia显卡驱动版本：450.66CUDA版本：10.2.89二、下载cudnn各版本选择最新的8.0.5版本。三、安装sudo dpkg -i libcudnn8_8.0.5.39-1+cuda10.2_amd64.debsudo dpkg -i libcudnn8-dev_8.0.5.39-1+cuda10.2_amd64.debsudo dpkg -i lib

ubuntu16.04安装cuda参考：https://docs.nvidia.com/cuda/cuda-installation-guide-linux/#introduction安装之前确认系统是否具有支持CUDA的GPU。确认系统正在运行受支持的Linux版本。验证系统已安装gcc。验证系统是否安装了正确的内核头文件和开发包。下载NVIDIA CUDA工具包。处理冲突的安装方法。...

ROS发布栅格地图nav_msgs/OccupancyGrid数据并在rviz中显示wiki:DisplayTypes/Map实验环境Ubuntu20.04 ROS(noetic)1.新建工程mkdir -p catkin_ws/srccd catkin_ws/srccatkin_create_pkg map_demo roscpp rospy nav_msgscd ..catkin_make 2.编辑主函数路径：map_demo/src/mappublish.cpptopic名字

rviz用History Length显示PointStamped点的运动轨迹1.发送节点发布PointStamped数据到topic。创建工程的方法见ROS发布话题PointStamped数据并在rviz中显示#include <ros/ros.h> #include <geometry_msgs/PointStamped.h>int main (int argc, char **argv) { // 初始化ROS节点 节点名字 ros::init (a

catkin_create_pkg rosopencv sensor_msgs cv_bridge roscpp std_msgs image_transportcatkin_create_pkg camera_demo sensor_msgs roscpp std_msgs

ROS发布PointStamped话题数据并在rviz中显示wiki:rvizDisplayTypesPolygon实验环境Ubuntu20.04 ROS(noetic)1.新建工程mkdir -p catkin_ws/srccd catkin_ws/srccatkin_create_pkg polygon_demo roscpp geometry_msgs cd ..catkin_make 2.编辑主函数路径：polygon_demo/src/publisher.cpptopic

ROS创建PointStamped数据并在rviz中显示实验环境Ubuntu16.04 ROS(kinetic)1.新建工程mkdir -p catkin_ws/srccd catkin_ws/srccatkin_create_pkg point_demo roscpp rospy geometry_msgs std_msgscd ..catkin_make 2.编辑主函数路径：point_demo/src/create.cpptopic名字为outputframe_id为map

linux系统c读写文件函数open write read lseek用法实例