By leading into the group orientation parameters,atomic characteristic valueβ_i of the side chain carbon and oxygen in ali- phatic alcohol molecules is modified.

The paper used a topological index(~mQ),and a orientating group parameter (S_(ox)).

The multi-dimensional scaling(MDS)method was applied to systematically study the quantitative structure-activity relationship of nitrobenzene derivatives which is based on their substituted group structure descriptor characterized with six group parameters.

Finally,when the wheels jumped up and down,wheel location parameters were simulated.

In this paper, based on the model of variance component, robust estimation of location parameters is discussed, and the formula for likeihood estimation of variance component is given, the robust estimation of variance component (the scale parameters ) that meets the Fisher s consistency is derived.

When the wheels jumped up and down,wheel location parameters were simulated.

In this paper,the quaternion is taken for positional parameters to control the attitude of a spacecraft.

It is shown that quaternion has combined the advantages and functions of other positional parameters and transformation algorithms, it can be applied not only to the dynamics of a rigid body, but also more generally to the mechanical analysis and the control for multi-body systems.

Review of researches on the front wheel alignment parameter of vehicles;

The wheel alignment parameters which can change with the travel of the wheel and influent the handling and stability and wear of tire and also puzzle the auto producers to design suspension are very important in the suspension system.

Then kinematic simulation and analysis of rigid bodies is carried out using the software ADAMS,and the change regularity of each alignment parameter of the suspension with jumping of wheels is obtained.