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Based on the annual panel data of Beijing-Tianjin-Hebei area from 1985 to 2018, this paper established a Panel Vector Autoregressive Model, variance decomposition, and impulse response function analyzing the linkage effect between the transportation and regional economy. The conclusions are as follows: Beijing-Tianjin-Hebei transportation integration and regional economic integration development are mutually reinforcing, but the results of variance decomposition show that they have different pulling forces, and the latter is more effectively than the former. The impulse response analysis show that the development of railways has made greater contributions to regional economic development than highways. In summary, there is a close relationship between the transportation integration and regional economic integration in the Beijing- Tianjin-Hebei region. They promote and coordinate with each other, but how to strengthen the relationship between them to make the area develop faster, more further research is needed.

For the control of the robot arm of a medical delivery robot, firstly, the forward kinematic equations of this 7-degree-of-freedom redundant robot arm are constructed according to a modified D-H method. Secondly, the analytical solution of the inverse kinematics of the redundant robotic arm is solved using the parameterised arm angle. Thirdly, kinematic simulation experiments were carried out by gazebo and RVIZ in ROS to verify the correctness of the forward and inverse kinematic solution process. Finally, the Monte Carlo method was used to generate the point cloud map of the workspace of the redundant robotic arm within the allowed range of joints, and the boundary points of the workspace were extracted, and the extracted boundary points were fitted with least squares curves to find the workspace of the robotic arm, which laid the foundation for future research directions such as motion control and path planning of medical delivery robots.