elasticity approach
2.With the theory of elasticity and thin shell,the principle of energy method and the approach of dis-crete load,the stress of flexspline was calculated,and the danger section and expression of the stress were pre-sented,also a comparison between calculated results and tested Ones was shown.
3.This paper examines the pricing of barrier options when the underlying asset follows the constant elasticity of variance (CEV) process. We construct a trinomial method to approximate the CEV process and use it to price barrier options, and demonstrate the accuracy of our approach for different parameter values of the CEV process.
4.This paper uses the methods of DEA and the cluster analysis to appraise on the scientific and technological progress of counties of Liaoning province. The DEA method is different from the traditional methods such as Solow and the Douglas production function approach from preventing the shortcomings of difficulty to ensure the elasticity, and is suitable to appraise a system with many input and output terms. The import of DEA is also the innovation of this paper.

