First,the mathematical model of tension for coil is built after making deep research on Flexible Forming Exact coil production process and operation flow of its entry section.

Finite element analysis of contact stress of helical gears with accurate model;

deflection routing,and puts forward both the approximate and the accurate models for the data loss analysis of single OBS node with and without wavelength conversion.

An existing work is extended to provide approximate and accurate models for the data loss analysis of single OBS node with and without wavelength conversion capability.

This article introduces a method with which AutoCAD programming language is used to Autolisp programme and automatically generate adumbration curve lines of involute gears with variables, and then by the functions of drawing figure transmit in Inventor to obtain precision sketch drawings in Inventor R2, so as to achieve precision molding of involute gears.

As for the requirement of guidance weapon counterwork simulation,the necessary and feasibility of the distribution simulation technology application were introduced,and the technology of the Real-time performance and the model exactness in network simulation system were analyzed.