查询词典 fractal dimension

The geological explanation of different fractal dimensions was presented via mathematical analyses.Two methods of estimation for fractal dimension,linear and n...

同时，通过模型及其分维值的数理分析，得出不同分维值的地学解释，讨论了分维的线性与非线性最小二乘回归估计法。

In this paper,a method to determine the fractal dimension of pore-solid interface in porous solid materials by the small angle X-ray scattering is introduced.This method is also used to determine the fractal structure of fly ash-cement pastes.

简要介绍了用X 射线小角散射分析技术测定多孔固体材料中气孔固体界面分形维数的理论，并将这一理论用于测定粉煤灰水泥浆体的分形结构。

In accordance with chaotic essence of speech signals , syllable segmentation in continuous speech is researched by fractal theory . an approach of syllable segmentation using variance fractal dimension is proposed , its performance is analyzed in detail . the method can discriminate between voiced and unvoiced , between surd and sonant , but it can hardly discriminate between sonant

本文根据语音信号的混沌本质，利用分形理论研究了汉语连续语音中的音节分割问题，提出了基于方差分形维数的音节分割方法，并详细分析了该方法的性能，它能很好地解决了无声与有声、浊音与清音间的分割问题，但很难解决浊音间的分割问题，当浊音相连且过渡段较短时，该方法无法实现它们之间的分割。

Studies were made of the calculation of fractal dimension of transverse impact fracture surface, and of the correlation between impact toughness of steel and parameters of free-cutting phase by means of the developed fractal geometry model of crack propagation.

通过建立裂纹扩展的分形几何模型，计算了冲击断口的分形维数，研究了冲击韧性与易切削相参数的相关性。

On the basis of summarizing current fractal dimension algorithms, the random midpoint replacement algorithm was employed to obtain interpolating point according to the fractal features of remote sensing image ,so the current widely used triangular prism method was improved.

在总结现有分形维数计算方法的基础上，根据遥感影像的分形特性，利用随机中点替代法获取插值点，从而对目前普遍使用的三棱柱面法进行了改进。

The fractal dimension of the different geotectonic elements was calculated and the relation between the fractal distribution and the damage evolvement was given in this paper.

计算了不同大地构造单元的断裂构造的分形维数，给出了其分形维数与损伤演化的关系。

After grain structure analysis, using the fractal theory we get the fractal dimension of granulometric composition of red soil with different pH.

通过对不同pH值红土试样的颗粒成分进行测试，借助分形理论得到不同pH值红土粒度成分分维值。

Based on DEM data of different development periods of a indoor watershed model obtained from the integration of artificial simulated rainfall experiment and high accuracy digital photogrammetry technique, the fractal dimensions of topographic feature under different development periods of the indoor watershed model based on variation method were calculated and the relationships between watershed topographic feature fractal dimension and topographic factors such as watershed gully density as well as ground lacerative degree was discussed preliminarily.

以室内流域模型人工模拟降雨试验和高精度摄影测量获得的模型流域不同发育时段的数字高程模型数据为基础，采用变分法计算了流域地貌形态分形维数，并对分形维数与地貌因子沟谷密度和地面割裂度的关系进行初步探讨。

Results show that the formation of inaccessible pores occurs in the initial reaction stage mostly; fractal dimensions decrease continuously in the process of sulfating, and the relationship between the fractal dimension and pore distribution meets the Friesen equation.

结果表明：脱硫剂中不可进入孔隙的形成主要出现在硫化反应的开始阶段；随着硫化反应的进行，脱硫剂孔结构的分形维数不断减小，且孔隙分布与分形维数之间满足Friesen关系方程。

Hydro-pneumatic suspension ; Mathematical model ; Nonlinear ; Computer simulation ; Stiffness ; Damping ; drilling machine ; fractal dimension ; fractal model

吉林大学；王智明油气悬挂；数学模型；非线性；计算机仿真；刚度；阻尼；钻机；分形维数；分形模型

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。