体积分形维数,volume fractal dimension
1)volume fractal dimension体积分形维数
1.Porevolume fractal dimensions of fly ash - cement paste at different ages and its porevolume fractal dimensions were determined by MIP(mercury intrusion porosimetry) on experiments.采用压汞法对不同龄期粉煤灰-水泥浆体的孔分形结构进行了实验研究,测定了复合浆体孔体积分形维数,探讨了孔体积分形维数与孔隙率,孔表面积、平均孔径、孔分布及宏观力学性能的关系。
2.The relationship of porevolume fractal dimension with porosity,pore area,pore size distribution and phosphate slag content are investigated.研究表明,磷渣-水泥浆体的孔结构具有明显的分形特征,孔体积分形维数在2。
英文短句/例句
1.Influence of Pore Diameter Distribution on Porous Nickel"s Pore Volume Fractal Dimention孔径分布对多孔镍孔体积分形维数的影响
2.The Fractional Calculus of a Type of Fractal Function and the Dimension;一类分形函数的分数阶微积分及其维数
3.Natural Frequencies of Composite Beams Having Variable Fiber Volume Fraction Including Rotary Inertia and Shear Deformation纤维体积分数可变的复合材料梁计及转动惯量和剪切变形时的固有频率
4.Analysis on Fractal Dimensions of Liquid Front During Explosion Dispersion爆炸分散液体前锋形态的分形维数分析
5.The McShane and Henstock Integrals of Fuzzy-Number-Valued Functions in n Dimensions;n维模糊数值函数的McShane积分和Henstock积分
6.Effects of Structural Parameters on Fiber Volume Fraction of 3D Woven Composites;结构参数对三维机织复合材料纤维体积分数的影响
7.Effect of Different Volume Fraction of Martensite on Deformation Behavior of Dual Phase Steels马氏体体积分数对双相钢变形行为的影响
8.Arithmetic Research of Fractal Dimension with Image Face Based on Fractional Brownian Motion基于图像表面积的分形布朗运动分数维算法研究
9.Integrals extend to higher dimensions through multiple integrals.积分借着重积分扩展到较高的维数。
10.The fractal measurement of aerosol equivalent volume based on counting signal悬浮颗粒计数信号等效体积的分形测度
11.Numerical Simulation of Effect of Jetting Speed on 2-D Ni Dendrite Fractal Growth in Jet-electrodeposition with Point Anode射流速度对点阳极电沉积二维镍枝晶分形生长影响的数值模拟
12.On the Boundary Type Cubature in Multiple Numerical Integration;高维数值积分边界型求积公式的研究
13.Form is sometimes referred to as area, mass or shape. Three-dimensional forms are solids. Two-dimensional forms with length and width are plane forms.形体有时被认为是面积、体积或形状。三维形体是实体。具有长和宽的二维形体是平面。
14.A Prospectively Randomized Study of Clinical Target Volume Margins for Three-dimensional Conformal Radiotherapy in Patients with Squamous Cell Carcinoma of Thoracic Esophagus;食管癌三维适形放射治疗临床靶体积前瞻性随机分组临床研究
15.Three-dimensional Digitalized Visualization of Necrotic Volume, Distribution and Morphology and Collapse Identification on ONFH三维CT重建股骨头坏死体积、分布、形状的测定及塌陷预测
16.Effect of Martensite Volume Fraction on Deformation Dislocation Structure and Fracture for Hot Rolled Dual-Phase Steel马氏体体积分数对热轧双相钢形变位错结构和断裂的影响
17.Finite Volume Method and Its Application of the Two-dimensional Numerical Simulation in the Narrowed Riverway Flow Field During Construction Diversion;有限体积法在分期导流束窄河道流场二维数值模拟中的应用研究
18.3D-FLIT and its application to linear feature extraction of ICT cubic data三维有限线积分变换及其在工业CT体数据线特征提取中的应用
相关短句/例句
pore volume fractal dimention孔体积分形维数
1.Porous nickel\"spore volume fractal dimention is determined by data of MIP based on Menger-sponge model,pore structures of porous nickel is found to have typical fractal nature and the values of fractal dimension are between 2.用压汞法对用粉末冶金法制备的多孔镍试件进行了测试,得到了多孔镍试件的孔隙率及孔径分布曲线,并以Menger海绵体模型为基础,根据压汞实验数据确定了多孔镍试件的孔体积分形维数,发现多孔镍的孔隙结构具有明显的分形特征,分形维数在2。
3)steel fiber content钢纤维体积分数
4)fiber volume fraction纤维体积分数
1.Effect offiber volume fraction on friction and wear properties of C/C composites;纤维体积分数对炭/炭复合材料摩擦磨损性能的影响
2.Calculation offiber volume fraction for multidirectional filament wound glass-fiber/epoxy tubes;多向纤维缠绕玻璃钢管的纤维体积分数
3.The relationships of the loop length, stitch density and thickness of fabrics to yarn linear density were analyzed with the experiment data, and thefiber volume fraction of glass fiber plain knitted fabrics was estimated theoretically.通过对针织物结构参数的研究,分析了玻璃纤维针织物线圈长度、密度以及厚度与纱线线密度的关系,并从理论上推导了纬平针织物的纤维体积分数。
5)fibre volume fraction纤维体积分数
1.Effects of variousfibre volume fraction on the performances of C/C composite;纤维体积分数对炭/炭复合材料性能的影响
2.In this paper, the effects of thefibre volume fraction on mechanical properties of K 3D/MCPA composites are presented.本文研究了纤维体积分数对三维编织芳纶纤维增强铸性尼龙 (简称K3D MCPA)复合材料力学性能的影响。
6)fiber volume content纤维体积分数
1.Based on three group of integer felts with differentfiber volume content were densified with CVD pyrolytic carbon, and a model of gas transport within a integer felt on the course of CVD process, the effect of carbonfiber volume content on the densification course of CVD (chemical vapor deposition) was investigated.将3组不同纤维体积分数的整体毡采用等温CVD进行沉积热解炭增密,结合CVD沉积过程中整体毡内气体传质数学模型,研究了整体毡的纤维体积分数对CVD增密过程的影响,研究结果表明:纤维体积低的整体毡沉积时增重率高;纤维体积分数高的整体毡容易获得较高密度的C/C复合材料;纤维体积分数超过35％的整体毡经过300 h的化学气相沉积,坯体的体积密度能达到1。
2.The geometry model formular is used to deduce the length of yarns,the oridentation angle of the nodulated yarns and thefiber volume content on some typical 2.借助模型推导出纱线在几种典型结构(浅交弯联、浅交直联、深角联)的单元体结构内的纱线长度、接结经的取向角和纤维体积分数,并对材料进行拉伸、压缩性能预测。
延伸阅读
分形维数分形维数fractaldimension描述分形最主要的参量。简称分维。通常欧几里德几何中，直线或曲线是1维的，平面或球面是2维的，具有长、宽、高的形体是3维的；然而对于分形如海岸线、科赫曲线、射尔宾斯基海绵等的复杂性无法用维数等于1、2、3这样的数值来描述。科赫曲线第一次变换将1英尺的每边换成4个各长4英寸的线段，总长度变为3×4/3＝4英尺；每一次变换使总长度变为乘以4/3，如此无限延续下去，曲线本身将是无限长的。这是一条连续的回线，永远不会自我相交，回线所围的面积是有限的，它小于一个外接圆的面积。因此科赫曲线以它无限长度挤在有限的面积之内，确实是占有空间的，它比1维要多，但不及2维图形，也就是说它的维数在1和2之间，维数是分数。同样，谢尔宾斯基海绵内部全是大大小小的空洞，表面积是无限大，而占有的3维空间是有限的，其维数在2和3之间。计算分形维数的公式是，式中ε是小立方体一边的长度，N（ε）是用此小立方体覆盖被测形体所得的数目，维数公式意味着通过用边长为ε的小立方体覆盖被测形体来确定形体的维数。对于通常的规则物体，覆盖一根单位长度的线段所需的数目要N（ε）＝1/ε2，覆盖一个单位边长的正方形，N(ε)＝（1/ε）2，覆盖单位边长的立方体，N（ε）＝（1/ε）3。从这三个式子可见维数公式也适用于通常的维数含义。利用维数公式可算得科赫曲线的维数d＝1.2618，谢尔宾斯基海绵的维数d＝2.7268。对于无规分形，可用不同的近似方法予以计算，也可用一定的适当方法予以测定。分维反映了复杂形体占有空间的有效性，它是复杂形体不规则性的量度。
