Firstly,the analysis methods at present are reviewed and classified,the applicability and characteristics of screening methods,local sensitivity analysis methods and global sensitivity analysis methods are brought forward.

The global sensitivity analysis(SA) is the important methods that was used to analysis effect of the uncertain inputs to the output.

Generalization of Wintner s Theorem and Global Smooth Linearization;

Global Topological Linearization in Critical Case;

This paper proposes a particle swarm optimization based on local and global combined search.

Efficient interval-genetic algorithm for multi-peak global optimization;

Improved evolutionary algorithm for global optimization based on a smooth function;

Application of a new global optimization to displacement back analysis for geotechnical engineering;

Taking the main shaft system of a hydraulic turbine-generator u- nit as object,the nonlinear global coupling dynamic equations were established by using finite element method.

On the basis of a thorough analysis of the methods of declaration and accessing to the static data member in C++ language,authors point out the abuse of utilizing global variable to implement the shared data in program design,and at the same time give out the ways how a static data member replaces the global variable and questions to be paid attention to in using static data member.

The article starts from discussing the concept of global variable in C#,extends to the definition and usage of global used variables with detailed analysis and explanations from different angle and level.