Analysis about processing error influencing the stability of gear;

Research of operating stability on the loader;

Gearshift Stability of Power Gear Governor;

Singularity and Stationarity Study of TPT - 2PTT Parallel Machine Tool;

Based on the fundament concept on stationary and ergodic stochastic process and lots of bore hole data,the authors examined the stationarity and ergodicity of spatial on static sounding test data.

The unit root test method in econometrics is used to examine the stationarity of five economic indexes about Zhongguancun Science Park.

Bayesian test for stationary of ARMA process;

Further,the theoretic discussion has been made for the result came from the stationary and cointegration study using the methods of econometrics statistic and the special softwares.

The functions of the model include to apply logarithm transformation for making the sequence more stationary,to construct a corresponding auto-regression model for reducing the herteroskedasticity of residual,to determine the component of the prime period by periodogram analysis.

Design and Implementation of the Test Apparatus for Measuring the Comfortableness and Smoothness of Trains;

The effects of spark on the combustion mode transition have been investigated in order to improve the smoothness of the transition.

This paper points out the force characteristics of continuous beam arch composite bridge,introduces basic meaning and evaluation criterion of train safety,comfort and smoothness,and calculates and analyzes train running safety,comfort and smoothness of Kunyang grand bridge in Wen-fu line based on space vibration computational model of train-bridge time-varying system.

Influence of mass location between primary suspension and secondary suspension on locomotive riding quality;

Through the semi-active suspension locomotive model built with sunshade control principle and dynamics simulation software SIMPACK, the riding quality under lateral, vertical semi-active and passive suspension are compared, as well as the dynamics performance of 300m curve negotiation.

It is pointed out that the high flexibility air spring is one of the key technologies for bolsterless bogie, andthat its lateral rigidity is decisive to the riding quality of vehicle and heavily influences the hunting stability.

Taking the carbody as a uniform Euler beam supported on secondary suspension,including the structure damping ratio and the flexible damper,a vertical model was built to research the effects of flexible damper on the vehicle ride quality by using the fast ride quality calculation algorithm.

The Ride quality of a typical high-speed passenger car installed with DVA was analyzed.

With this model and the fast calculation algorithm of ride quality of railway vehicles,the influence of carbody flexibility on ride quality is researched.