布尔运算

We have simplified the algorithm of 3D Boolean Operation a lot, and improved the stability mentioned above.

使得三维布尔运算的算法大大简化，稳定性也得到了提高。

Use of the C language arbitrary polygon and complex Boolean operation perfunctory process and dynamic show.

利用C语言实现了任意复杂多边形的并交差布尔运算及动态过程显示。

Plane graphics Boolean operation of the plane and graphics, poor pay and make object-oriented programming design.

平面图形布尔运算，对平面图形的并、交和差做出面向对象的程序设计。

Then,it discusses the method of Parametric Design of E·P and Boolean operation in the parametric design.

阐述了建立电除尘器参数化模型的意义，介绍了ANSYS参数化设计语言APDL、ANSYS命令流及电除尘器的结构特点，并讨论了电除尘器参数化建模的方法及参数化建模中的布尔运算。

Recently, constructing entity based on computer aided modeling is one of the most efficient and most widely used method, and it has proved that Boolean Operation plays a very important role in such constructing process.

目前，通过计算机辅助建模生成物体是最高效也是最广泛应用的方法，布尔运算在建模过程中的作用显得尤为重要。

The paper also defines a kind of operation that is similar to Boolean operation and gives the matrix representation of the FINDU.

然后，定义了1种类布尔运算，并依此给出了FINDU网络的矩阵表示。

It will support the Boolean Operation and will be the key for second design of the STL models, because of the STL models has strict TOP information.

由于STL文件格式具有严格的拓扑信息，这正为布尔运算提供了支持，同时也是STL文件二次设计的关键。

After a brief introduction of Three Dimensional Boolean Operation concepts, we illustrated the way how to decrease the procedure from three dimension to two dimension, and discussed on those singular problems, so that we can get the three dimensional topological information.

在简要的描述三维布尔运算基本概念后，我们给出了具体的三维到二维的降维过程，讨论了在二维空间中解决奇异问题的方法，最后得到三维重构拓扑信息。

To construct a new model from the existing models is an important modeling method in digital enter- tainment. Boolean operation method for point models based on RBF is proposed in this paper.

由已有模型构造新的模型是数字娱乐领域的重要造型方法，提出了一种基于RBF的点模型布尔运算方法。

The gunports were made with boolean substraction operation.

炮眼的制作应用了布尔运算。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。