通过分析mcnp中子学模型文本描述和构造立体几何表示法的关系，指出从构造立体几何表示法到CAD模型的转换是MCNP中子学模型可视化的关键所在。
Analysis on the relationship between the text description of MCNP neutronics model and the CSG shows that the conversion from CSG to CAD model is the key issue of the visualization.
亚式期权有两种理论上的表示方式，即采用算术平均法计算资产价格的平均值和采用几何平均法计算资产价格的平均值。
There are two means to measure the average prices of the assets in an Asian option theoretically: with the arithmetic average and with the geometric average.
针对高维几何布局问题中布局物体的建模问题，提出2-叉树方法，在一般维度下系统地给出了抽象物体的叉树表示法的构造。
With the modeling problem of layout items in high dimensional layout problem as the application object, this paper introduces the concept of 2n-tree representation.
应用光程函数法计算出旋转对称电子光学系统的7级几何像差，给出旋转对称电磁场同时存在情况下的系统7级几何像差表示式。
The 7th order geometrical aberration of rotationally symmetrical electron optic system and their expressions are given by using the eikonal method when the electric and magnetic fields exit.
在细微边界元识别和细微特征分解交替进行的过程中，任意用边界表示法表示的几何模型可逐步简化到任意程度。
In the cycle of detailed boundary entities recognition and detail feature decomposition, an arbitrary solid model which is represented as B-Rep model can be simplified to any level.
结果证明：基于图元表示法对常见手绘几何图形识别速度快、准确率高；
The results prove that:our system has a high speed and accuracy.
结果证明：基于图元表示法对常见手绘几何图形识别速度快、准确率高；
The results prove that:our system has a high speed and accuracy.
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