Study on the Design of Hengtong Eco-industrial Park;

To calculate the aerodynamic forces on the vehicle and grid-fins, we use time-dependent method to solve the Navier-Stokes equation of ideal gas, and flux conservational multizones method to divide the complex vehicle and grid-fins into eight computational zones which are relatively independent, and correlative with each other at once with satisfactory results.

On the basis of working principle of asynchronous motor,this paperproves that the slip frequency control for the constant magnetic flux has similarcontrol mechanism with DC regulating speed system by theor etical analysis,andpoints limitations of the control method.

In order to detect whether there is a base gap between the explosive charge and the inner cone of a shell and ensure its fighting performance, this paper puts forward an ultrasonic inspection method of base gap based on the principle of conservation of sound flux in propagation and according to the special construction of the shell.