查询词典 fractal

First a hierarchically structured genotype is applied to represent cycloid parameters, and selection and mutation operators with evolutionary art are used to generate diverse patterns. Those with higher user rating are stored into the pattern database. Then fractal theory is introduced to configure these patterns on the basis of two distinct methods-Pythagoras tree design and Curlicue Fractal design.

采用层次结构化基因型表示摆线参数，使用进化艺术思想进行选择、变异操作，生成造型各异的花形图案，将用户评分较高的图案存入图案数据库；引入分形理论将图案库中的元件进行组装，提出基于Pythagoras树和花体分形原理的2套组装方案。

For the purpose of classification, the fractal scales and the fractal dimensions along horizontal, vertical and diagonal directions are obtained to form a feature set with six parameters. The probabilistic neural network is used as the texture classifier. Results have shown satisfied classification of natural textures.

文中利用纹理图像在水平、垂直和对角3个方向上的分形尺度和分形维数作为特征集，采用概率神经网络作为分类器进行自然纹理图像分类，得到准确的分类结果。

Microstructure properties of gas diffusion layer in PEM fuel cells were described by fractal dimension s in fractal theory.

采用分形理论中的重要参数分形维对质子交换膜燃料电池扩散层的微结构特征进行描述。

The variation regularity of joint size and the shear strength of fractal rock joints with different fractal dimensions were subsequently studied by using the numerical direct shear test method.

为了研究岩石节理抗剪强度参数取值中的尺寸效应问题，采用随机分形方法，重构了岩石节理剖面线，在此基础上，应用数值直剪试验方法，研究了不同分维值岩石分形节理抗剪强度参数随节理尺寸的变化规律。

According to the principle of fractal geometry, the fractal models for describing the pore size distribution and capillary pressure curve were developed.

应用分形几何的原理，推导了储层岩石不同孔隙分布和毛细管压力曲线的分形几何模型。

Because of the distribution of macropore exhibit fractal rule, fractal theory can be used to study the structure of macropore.

由于土壤大孔隙的分布呈现分形规律，因此可以采用分形理论研究土壤大孔隙结构。

Regular icosahedron ; regular dodecahedron ; quasicrystal ; conjugate fractal structural model ; conjugate fractal structural model of quasicrystal ; Penrose pattern ; high resolution structural image by electron microscopy.

正十二面体；正二十面体；准晶体；共轭分数维模型；准晶共轭结构模型； Penrose拼图；高分辨电子显微结构图

The boundary of the crack domain is constructed with the standard Koch fractal curve and the elastic strain energy of the plate is given out by using the perimeter-area relation of the fractal crack domain.

以标准Koch分形曲线构造裂纹的边界，并由分形区域周长与面积的关系推导出平板的弹性应变能。

The elegancy and singularity of fractal pictures attract the attention of more and more fractal fans.Fractality is not only used for enjoyment,but also is a new research direction of geometry which is the research on anomalous geometry objects.

分形图形的优美与玄妙吸引着越来越多的分形爱好者，它不仅仅是用来欣赏的，而且代表着几何学的一个新的研究方向，即对非规整几何对象的研究［1］。

Fractal and fractal dimension theories applied on catalysts were introduced in this paper.

介绍了分形和分形维数在催化剂研究中的应用。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。