By employing computational fluid dynamics software CFX to numerically simulate the process of a car trailing a container truck, a relative aerodynamic drag coefficient curve of the car in the process of trailing is obtained, and a study on the external flow field of the car is carried out.

When the leading bubble was steady,the relationship between instantaneous velocity,shape,acceleration of the trailing bubble and viscosity、 bubbles distance、bubble length was obtained.

By employing the Computer Fluid Dynamics(CFD) software to simulate the process of a car trailing a large truck,the aerodynamic drag coefficient and the aerodynamic lift coefficient of the car in the process of trailing were obtained.

Failure process for numerical control machine with random ending method;

Fault process for turret systems of CNC lathes with random ending;

The advances of random censoring data;

Fisher information matrix for random censoring model with incomplete information;

With the data of random censoring constant stress life test,the estimation of Bayes of three parameters is derived when the 3 parameter Weibull distribution is under the condition of squares loss.

Computational Simulation of External Flow Field of Truck in Tandem and Research on Its Fuel Economy;