查询词典 fractal

Then, divided significant region into two groups:self-similarity and non-self-similarity blocks by fractal coding and pre-set threshold, picked up the robustest pseudo-Zernike moments among the pseudo-Zernike moments of the self-similarity blocks.Finally, embedded the watermark by quantizing the magnitudes of the robustest pseudo-Zernike moments.

算法首先利用归一化技术和不变质心理论在图像中提取出重要区域；然后利用分形编码及设置的阈值将重要区域分成自相似性块和非自相似性块并计算自相似性块的伪Zernike矩，从中选出最鲁棒的矩；最后通过量化调制伪Zernike矩幅值将水印嵌入其中。

By using the Rescaling Range analysis(R/S analysis),we analyse the multi-fractal features in the system of Shanghai and Shenzhen Stock Market Composite Index.We estimate the Hurst exponents in the above mentioned system.

本文根据沪、深两市综合指数收益率的真实时间序列，通过应用重标极差分分析法分析了沪、深股市中存在的分形特征，并得到了两个市场的Hurst指数。

Characteristics and principles of time clustering and frequency with a seismic sequence of more 380 years (1615 —1998) are performed using fractal theory and rescaling range analysis theory. It is concluded that the fiactal dimensions of seismic subset are similar to each other, the mean value is about 0.405, and interval of scale invariance can change 1-2 magnitude order. It is also found that the Hurst index ranges from 0.5412 to 0.5580. The results show that there is of statistical self-similar among different magnitude earthquakes in the area of bridge site.

应用分形理论和R/S分析原理，编写了程序，分析和研究了桥址区的380多年（1615～1998）地震序列的地震时间从集和地震频度特征及规律，得出桥址区不同震级范围的子集合具有近似相等的分维值，约为0.405，子集合无标度区可跨1～2数量级；不同震级层次的地震频度Hurst指数为0.5412～0.5580，都表明了桥址区不同震级层次的地震之间具有统计自相似性。

This paper introduces three methods calculating fractal dimension of log date:rescaled analysis,variogram analysis,power spectral analysis.

本文介绍了利用测井数据计算储层分维值的三种方法：变尺度分析法、变异函数分析法、功率谱分析法。

This paper put forward two methods of constructing randomizer in the Fractal applications:(1) The randomizer satisfing the Gauss normal distribution N(0,1) is constructed basing on central limit theorem of the probability theory;(2) The random sequence is created basing on the Chaos principle. There is not only randomness inside the random sequence but also in random sequence itself.

提出分形理论应用中构建随机数发生器的两种方法：根据概率论的中心极值定理，产生服从高斯正态分布N(0，1)的随机数；基于混沌学原理产生随机数，不仅随机数序列内部有随机性，而且随机数序列本身也具有随机性。

The pressure distribution equations for slightly compressible fluid flow in fractal porous media for the plane-radial and plane-parallel flows are presented, and they are found to be formally the same as those obtained by the conventional method.

分形多孔介质中径向和平行流动的压力分布方程在形式上与传统方法所得一致。

The crack and stress-strain of Chinese White Poplar were studied by the box counting method. The results showed that the cracks were obvious fractal and that the value of dimension D was determined to be between 1.2～1.5 by studying the crack propagation in the two dimensions. By comparing the crack propagation over a period of time, we found that the value of D increased as the crack increased.

运用数盒子法对裂纹发育带在二维平面内的分布进行了分形特征研究，发现木材裂纹具有明显的分形规律，分形维数为1.2～1.5；通过比较不同时间段的裂纹发育情况，发现裂纹的分形维数随着裂纹的扩展呈增加的趋势。

FRACTEID, as a portmanteau word, is used to describe a linguistic blend of "fractal" in its definition of fragmented geometric shapes that can be split into parts, and the Greek word Eidos (used for example in kaleidoscope) which refers to Plato's Ideal Forms and evokes the term "Eidetic memory," defined as the ability to recall images, sounds, or objects in memory with extreme accuracy and in abundant volume.

分形&FRACTEID&作为一个混成词，通常被用作形容不规则碎片在语言学上的混合，定义为可以被分成几个块或成碎片的几何形状，柏拉图理念形式所提及的古希腊词语理念，唤起&高级记忆&这个词语，定义为一种唤起记忆中极端准确的意象和物体，最顶峰值的声音。

Urban thermal surface ; profile line fractal ; significance ; Shanghai City

城市热表面；剖面线分形；意义；上海

In this dissertation, some researches are developed to overcome these disadvantages and to improve the image compressing quality with fractal Peano-hilbert scanning curve.

对此，本文结合DCT变换的特性，利用分形的Peano-hilbert扫描曲线，对基于DCT变换的图像编码方法进行了研究，并提出了改进方法。

We will see more and more activist government policies that distinguish economic activities according to the nationality of the actors.

我们将看到越来越多激进的政府政策，这些政策根据企业的国籍来区分经济活动。

If we can prove the independence of an axiomatic system, then we can guarantee the conciseness of this system, ie.

如果能够证明某个一阶谓词系统的独立性，那么就能够保证该系统的建立是精炼的，即没有任何一条公理或推理规则是多余的。