查询词典 fractal

Fractal and Chaos theories are among the most advanced sciences in the world. The application of Rescaled Range analysis in fractal characteristic of security market is researched in this paper.

分形和混沌理论是当今科学最前沿的学科，本文通过使用R/S分析方法，研究了中国股市的分形特征。

5By introducing the fractal theory to analyze logging curve's characteristics, the Rescaled Range Analysis method is used to calculate the fractal dimension on acoustic transit time, resistivity, natural gamma, spontaneous potential.

将分形理论引入到对测井曲线的特性分析之中，利用R/S分析方法对声波、电阻率、自然伽马和自然电位进行分维数计算，将计算结果与不同的水淹级别相联系，利用模糊综合评判方法对水淹层分级。

In chapter 4, the plane-radial and plane-parallel flows for Newtonian fluid in fractal porous media are analyzed. Based on the same assumption as that in chapter 3, the expressions for porosity, flow rate, velocity and permeability for both radial and parallel flows are developed. The proposed expressions are expressed as a function of tortuosity, fractal dimension, maximum and minimum pore diameters, and there are no empirical constant and every parameter has clear physical meaning in the proposed expressions.

第四部分研究了分形多孔介质中牛顿流体的平面径向和平行流动，考虑到实际毛细管的弯曲性和毛细管管径的分形分布，给出了径向和平行流动时的孔隙数目、孔隙率、流量、流速和渗透率的分形表达式；得到了分形多孔介质中微可压缩流体的压力分布方程；得到了无量纲的渗透率、压力和流速的解析表达式。

In this paper, the Principle of fractal geometry was applied to describe the fractal properties of poplar wood cell lumen distribution.

应用杨树木材横切面的细胞直径分布描述木材横切面空隙分布的分形特征。

According to simple computation, good anti-noise ability and low precision of Katz algorithm and complex computation and good precision of box-counting dimension and correlation dimension, an Improvement fractal algorithm Based on Wave is presented and analyzed through the fractal Brown curve and noisy speech according to the characteristic of the box dimension and Katz dimension.

摘要该文针对目前的分维计算方法——盒维、关联维等精度虽高，但计算复杂，Katz维计算简单、抗噪性能好、但精度不高的现状，提出了一种改进的基于波形的算法——IBW-FD，分析了对分形布朗曲线、含噪语音(高斯白噪声，三种非平稳噪声)的性能。

The simulation and test results show that the space-filling feature of Hilbert fractal structure antenna can be effectively transformed into the size-reducing feature, and that the RFID tag antenna with one-dimension Hilbert fractal structure is of higher efficiency.

仿真和实测结果表明，Hilbert分形结构天线的空间填充特性可有效转化为标签天线的尺寸缩减特性，而且一维Hilbert标签天线具有更高的天线效率。

Finally, we try to add a new concept of fractal, and find the correlation about antenna gain, antenna spectrum, and the space-filling properties of the fractal geometry.

最后尝试加入碎形之设计概念，并比较碎行程度对天线频谱与增益之影响。

a novel miniaturization bow tie rfid tag antenna is proposed based on the triangular sierpinski fractal microstrip.the port characteristics of the proposed antenna are presented by simulation.at the same time,the resonance frequency,the radiation pattern and the efficiency of the sierpinski tag antenna is given.the results of the simulation show that multiple frequency band can be obtained by varying the dimensions of the fractal structure.hence this kind of antenna can be used into the rfid tag antenna very conveniently.

摘 要：基于三角形sierpinski微带分形贴片，提出了一种新型的小尺寸领带结rfid标签天线设计。通过仿真，给出了该分形天线的端口特性，同时给出了该领带结型sierpinski标签天线的谐振频率、方向图以及天线效率。结果表明，采用不同维数的分形结构，可以实现多频段的工作特性，因而该天线可以很方便地应用于rfid电子标签中。

When the fractal dimensions are different, the oxygen contents of the surfaces after the dropwise condensations are different. And the fractal dimension of the magnesium surface becomes larger.

结果表明冷凝试件的表面形貌特征对初始滴状冷凝有较大影响，其分形维数不同，冷凝后镁表面氧含量也不同，冷凝后镁表面形貌的分形维数变大。

In this paper , we combine both Efficient Market Hypothesis and Fractal Market Hypothesis to test our bond markets return distribution , the main results are that the index of Chinese bond market process by fractional Brownian Motion, the orbit is stable Pareto Distribution with α character So, the fractal market hypothesis is more suitable than the efficient market hypothesise

本文结合有效市场假说与分形市场假说理论，通过对我国证券市场中收益率的分布收入研究发现：中国股票市场是以分数布朗运动方式进行的，所形成的运动轨迹呈现出典型的α＜2的稳定帕雷托分布。因此，应该说，&分性市场假说&比&有效市场假说&更适用于中国股票市场。

Great. What repertoire did you see?

太棒了。你看的是什么剧目？

I prepared not to accept such ridiculousness:"Please," I said to him.

我可不想理会这套荒谬的东西："请你通情达理一点儿。"