查询词典 fractal

Fractal dimensions of images have been calculted using usual methods such as triangular prism method, fractal Brownian motion method, DBC box-counting method and multi-fractal method.

实现了常用的三角棱柱法、分形布朗运动法、DBC计盒法和多重分形法等分维数计算。

This paper researched the Fractal theory and suggested that it can be applied in Packing CAD System. The parameter design of fractal image was realized to stimulate anomalous scenes and draw typical fractal pictures.The paper aimed to upholster packing products,to publicize packing merchandises and to defend fake brands.

本文通过对分形理论的研究，提出将分形理论应用到包装CAD系统，并实现参数化设计，在计算机上模拟不规则的自然景物和典型的分形图案，目的是借助分形图案的自相似和无限延展的特性，帮助我们进行包装产品的装潢设计、包装商品的宣传及包装商标的防伪。

Two novel fractal network microchannel heat sinks are originated, namely, the biomimetic fractal tree-like microchannel net born of mammiferous aspiratory system and the biomimetic fractal comby microchannel net born of natural honeycomb.

首次提出并加工出了树状分形结构微管道网络换热器和仿蜂巢结构微管道网络换热器；分别对2种硅制分形结构微管道网络换热器的流动与换热特性进行分析，并与平行阵列型微管道换热器进行了对比。

In addition, the paper analyzed the influence of fractal dimension values on the compaction characteristics, and indicated that the fractal dimension values was the representation of gradation, the gradations with different fractal dimension values had different compaction process and energy dissipation, but the trend of compaction curve was consilient.

通过分析分维值对级配压实特性的影响，认为分维数是级配的表征，不同分维数级配的压实过程以及压实耗能也不一样，但其压实曲线变化趋势一致。

The generalized fractal dimension model of openings perimeter in jointed rock mass is put forward. The relation between erecting parameters and generalized fraetal dimension of openings perimeter is analyzed. According to the fractal theory, the relation between overbreak as well as underbreak and generalized fractal dimension of openings perimeter is built.

块体理论是研究洞室超欠挖的重要工具，它是从拓扑几何学的角度来研究洞室中的关键块体，但关键块体与超挖块体之间存在区别，文中对超挖块体和关键块体之间的关系进行分析研究，应用块体理论和结构面网络模拟技术相结合的方法预测了洞室超挖块体的大小。

Because change of volume reflected eroding process of watershed and surface change reflected change of topography surface, this model described relationship between watershed topograph and erosion.iv As a quantitative index of wateshed topography, topograph fractal demension can represent surface shape information of watershed topography in the round. Reseach find that watershed model and actual watershed show good fractal character. Topography fractal dimension related with process of development of watershed physiognomy and represented degree of watershed development, v Sediment yield intensity of watershed model reflected erosion characteristic of watershed model in different development phase.

流域模型产沙强度的变化反映了流域模型在不同发育阶段的侵蚀特征，模拟试验研究结果表明：在整个流域模型地貌地貌的发育过程中，其产沙强度呈现由小到大，然后又逐渐减小的总体趋势，流域模型单位降雨产沙率及平均输沙率与地形分维数表现为Gaussian模型关系，其关系形式与结论3中相对体积和表面积之间关系相似，进一步说明了以地形分维数表达地形变化的合理性。

And their fractal figures have been drawn. Meanwhile, to obtain a better visual effect and simulate actual natural scene, software adopts the real color and color palette to enrich figures, and color animated cartoon to change them. To show the self-similarity and infinitive tractility of fractal figures, partial zoom has been made on them. In addition, the software also provides several groups of graphic parameters. Very different fractal figure can be created through slightly changing such parameters.

本文运用分形理论实现多种分形算法，在计算机上生成Mandelbrot集，Julia集，L系统，IFS迭代函数系统等典型的分形图形，同时运用真彩色及调色板技术丰富图形的色彩，实现了色彩动画，使其更真实的模拟自然景物；运用鼠标编程技术实现对图形局部的放大和缩小，体现分形图形的自相似性和无限延展性；提供多组参数，利用分形图形的混沌特性，通过微小的参数变化，生成完全不同的分形图形。

In both sampling period and fractal computing dimension,the signal is fuzzed to construct fractal dimension subordinating degree. A novel correct method,the fuzzy neural network diagnosis method,was proposed,in which the input is the fractal dimension subordinating degree, and the output is the unit matrix. A gearing system was diagnosed by using the modeling.

以多时间尺度采样所获得的分形维数隶属度作为网络输入，单位矩阵为网络输出的分形模糊神经网络，建立了时域精确诊断新方法，通过对典型齿轮系统故障进行精确诊断，结果表明分形模糊神经网络诊断方法的有效性。

In chapter 2, we proposed a fractal image coding method based on genetic algorithms. The searching scheme problem of domain block in fractal image coding is well solved by applying a robust genetic algorithm with well-selected populations and revised genetic operators. Experimental result has show that it can increase fractal image coding speed by this method.

第二章在简介分形图象编码和遗传算法的基础上，提出了基于遗传算法的分形图象压缩编码方法；通过有目的选择初始群体、改造遗传算子等手段，较好地解决了分形图象编码中的定义域块搜索策略问题，大大提高了分形编码的速度。

It is revealed that there is an evident fractal character for urban thermal surface profiles. The fractal dimensions in eight directions are between 1.530 0 and 1.780 6, which reveal the complexity of different thermal profiles. By analyzing the factors to UHI, thermal fractal characters are mainly due to the scope and shape of builtup area and land surface properties.

热场表面剖面线的分维数揭示了3个方面的意义：首先不同的分维数反映热场不同方向上温度变化的复杂程度；其次，相对于城市中心，反映不同方向上城市边界形态的差异性；第三，进一步揭示不同方向上，下垫面土地利用类型空间组合变化的复杂程度。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。