We study the effect of a single impurity in a one dimensional system with incommensurate lattice potential.

本文将单点杂质引入到不可共度势一维体系中，用格林函数方法推导了杂质状态的能级和波函数。

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The numerical results show that, the conjugate gradient method can solve the absorption coefficient well in one dimensional system.

数值计算的结果表明，共轭梯度法可以比较好的反演辐射系统的吸收系数。

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Moreover, it is difficult to implement a description of the wave front and the transformation of three-dimensional system of coordinates.

其次有关波前面的描述和三维坐标系之间的变换也是个难点。

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Webzen is especially proud of its system for producing three-dimensional graphics.

ECONOMIST: Computer games

The vehicle has a built-in safety system that uses lasers and three-dimensional models of its surroundings to navigate obstacle-strewn warehouses.

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Kay wants to take computing forward with his next great invention, an operating system that puts the user in a three-dimensional graphic world with scores of other users, all computing collaboratively and communicating through audio and visual messaging.

FORBES: Croquet, Everyone?