This paper presents the origin, expression and principle of six traditional hysteretic nonlinear models, which are dry friction model, bilinear model, Davidenkov model, Bouc-Wen model, trace method model and Bingham model, and analyzes their advantages, disadvantages and applications.

Moreover impact models and trajectory models are built up to simulate and analyze accidents, therefore computer - aided accident reconstruction can be realized.

The research aim of this thesis is to establish the whole trajectory model of representing the Moving Objects position, and to solve the tec.

Helicopter track prediction methods are thorough ly analyzed, and helicopter track model, decorrelation track model a nd their prediction analysis are also presented .

Research on the new locus shaping method to machine aspheric optical parts;

Precision analysis of precisely grinding machining machine for locus shaping method;

The factors affecting on the accuracy of surface figure of a spherical part made by new locus shaping method are analyzed and the measures, by which the accuracy needed for optical surface is achieved, are given.

Calculation of tourism environmental carrying capacity on tourist ecological footprint model;

Debate and development of ecological footprint model during the last 10 years;

Tourism environmental capacity of Gansu Province based on ecological footprint model