各向异性分数,Fractional anisotropy
1)Fractional anisotropy各向异性分数
1.The fractional anisotropy(FA)values of white matter in AD patients were measured respectively in parietal lobe and the genu of corpus callosum.方法 对 22例AD 患者和 22例健康老年人进行脑部 DTI 扫描后,测量顶叶和胼胝体膝部的各向异性分数值 (fractional anisotropyFA ),应用成组 t检验对 AD 组和正常对照组的相应区域进行比较,并用部分相关性检验对 AD 患者脑中各部位相应取值与临床认知评价量表之间的关系进行统计。
英文短句/例句

1.Fractional Anisotropy Using Diffusion Tensor MRI in Patients with Astrocytoma;弥散张量各向异性分数在脑星形细胞瘤诊断中的定量研究
2.Sensitivity Analysis on Parameter Characteristics for 3-dimensional Anisotropic Random Seepage Field三维各向异性随机渗流场参数敏感性分析
3.quasi-anisotropic layered medium准各向异性分层媒质
4.Computation of reflection and transmission coefficients for layered lossy anisotropic media;分层各向异性有耗介质的反射和透射系数计算
5.Numerical Simulation and Experiment on Interfacial Damage of Anisotropic Conductive Film Bonding各向异性导电胶膜损伤破坏试验与数值分析
6.isotropy and anisotropy各向同性和各向异性
7.Numerical Solution of the Singular Integral Equation of the Anisotropic Medium with Inclined Cracks;含斜裂纹各向异性介质的奇异积分方程数值解法
8.PFC NUMERICAL SIMULATION ON ANISOTROPIC PROPERTIES OF COHESIVE SOIL粘性土各向异性特性的PFC数值模拟
9.Approximation of Anisotropic Q_1 Element for Viscoelasticity Type Equations with Varying Coefficients;变系数黏弹性方程各向异性Q_1元逼近
10.The expriment on drawing metal board was conducted, and affection of the strain ratio of width and thickness and aeolotropism index upon the forming by drawing was analyzed.通过金属板料的拉伸试验,分析了厚向异性指数和各向异性指数对金属板料拉延变形的影响。
11.Study of Numerical Simulation and Characteristics of Multi-component Induction Logging Response in Anisotropic Media;各向异性介质中多分量感应测井响应数值模拟与特性研究
12.Material Parameter Identification of Orthotropic Composite Structure by the Finite Element Method;基于有限元分析的正交各向异性复合材料结构材料参数识别
13.Integral Equation Method for 3-D Electromagnetic Modeling in Layered Anisotropic Earth and Its Applications各向异性地层中电磁场三维数值模拟的积分方程算法及其应用
14.Using Fourier Series Method Analyze the Bucking of Rectangular Moderately-thick Plates with Multi-Edges采用傅立叶级数法分析各向异性矩形中厚板在多种边界下的屈曲
15.Three-dimensional numerical modeling of marine controlled-source electromagnetic responses in a layered anisotropic seabed using integral equation method各向异性海底地层海洋可控源电磁响应三维积分方程法数值模拟
16.Analysis on Mechanical Property of Anisotropy of Crystal CaF_2 and Simulation of Cutting Process in the Ductile ModeCaF_2晶体各向异性特性分析及切削仿真
17.Affection of Aeolotropism Index and the Strain Ratio of Width and Thickness upon the Forming metal board by Drawing;各向异性指数和厚向异性指数对金属板料拉延成形的影响
18.Anisotropic Analysis of Arbitrary Order Lagrange Finite Elements in Two and Three Dimention Spaces;二维、三维任意次Lagrange元各向异性分析
相关短句/例句

Fractional anisotropy分数各向异性
1.Methods Fractional anisotropy(FA)of 6 cases of CD and 6 healthy controls(HC)were compared with voxel-based analysis(VBA)in a whole brain manner.方法对6名先天性耳聋患者和6名正常人进行脑部DTI扫描,应用基于体素的分析(VBA)对CD组和正常对照(HC)组的全脑分数各向异性(FA)值进行比较,计算样本感兴趣区(ROI)Brodmann(BA)41、BA22和BA44区的平均FA值。
3)fractional anisotropy coefficient部分各向异性系数
4)fraction anisotropy部分各向异性指数
5)anisotropy parameter各向异性参数
1.The relationship of VTI media P-SV wave converted Point and anisotropy parameters;VTI介质中P-SV波转换点与各向异性参数关系
6)anisotropic parameter各向异性参数
1.When the exponent M of the yield function equaled two,the new yield criteria reduced to Hill48 criterion,especially if all the three anisotropic parameters(r0,.当屈服函数指数M=2时,改进的Barlat-Lian屈服准则可以退化成Hill48屈服准则,当各向异性参数r0=r45=r90=1时,可退化成Von Mises屈服准则。
2.The effects of anisotropic parameters, such as fibrous orientation angles and longitudinal or transverse elastic modulus in every layer, on the loss factor of anisotropic laminated damping plates for different laminated structures and modes were studied by methods of orthogonal experiments and with theory of anisotropic laminated damping structure.运用各向异性层合阻尼结构理论分析方法,考察了在不同结构、不同振动模态下各层纤维铺设角度、纵横剪切模量和纵横拉伸模量等各向异性参数对各向异性层合阻尼薄板损耗因子的影响。
3.We find that there is a critical exchange anisotropic parameter γ C=3 293 when B=0.当外场为零时存在一个临界交换作用各向异性参数γC。
延伸阅读

各向同性和各向异性  物理性质可以在不同的方向进行测量。如果各个方向的测量结果是相同的,说明其物理性质与取向无关,就称为各向同性。如果物理性质和取向密切相关,不同取向的测量结果迥异,就称为各向异性。造成这种差别的内在因素是材料结构的对称性。在气体、液体或非晶态固体中,原子排列是混乱的,因而就各个方向而言,统计结果是等同的,所以其物理性质必然是各向同性的。而晶体中原子具有规则排列,结构上等同的方向只限于晶体对称性所决定的某些特定方向。所以一般而言,物理性质是各向异性的。例如, α-铁的磁化难易方向如图所示。铝的弹性模量E沿[111]最大(7700kgf/mm2),沿[100]最小(6400kgf/mm2)。对称性较低的晶体(如水晶、方解石)沿空间不同方向有不同的折射率。而非晶体(过冷液体),其折射率和弹性模量则是各向同性的。晶体的对称性很高时,某些物理性质(例如电导率等)会转变成各向同性。当物体是由许多位向紊乱无章的小单晶组成时,其表观物理性质是各向同性的。一般合金的强度就利用了这一点。倘若由于特殊加工使多晶体中的小单晶沿特定位向排列(例如金属的形变"织构"、定向生长的两相晶体混合物等),则虽然是多晶体其性能也会呈现各向异性。硅钢片就是这种性质的具体应用。    介于液体和固体之间的液晶,有的虽然分子的位置是无序的,但分子取向却是有序的。这样,它的物理性质也具有了各向异性。