查询词典 contraction of tensor

Stop at a traffic signal we cannot express what is defective by saying that a muscular movement or contraction has occurred without a desire for it; ex hypothesi in the case of omissions no muscular movement or contraction need occur.

因为根据假定[MS30] ，在不作为的情况下，不需发生任何肌肉运动或收缩。

An implicit Curve reconstruction method is proposed which represents the curve with all algebraic tensor-product B-spline,and minimizes the tension ofthe B-spline and the approximate geometric distance between the curve and the point set.

提出一种以代数张量积样条曲线作为几何表示形式，基于近似几何误差和薄板能量极小化的隐式重构模型。

A frame to construct a blending surface among quadrics with the algebraic tensor-product B-spline surfaces was presented. A C^1 continuous algebraic spline surface was obtained that very smoothly joined the given quadrics.

给出了一种应用代数张量积B样条曲面构造blending曲面的框架并详细讨论了二次代数曲面间blending曲面的构造方法。

Linear algebra also plays an important part in analysis, notably, in the description of higher order derivatives in vector analysis and the study of tensor products and alternating maps.

这样向量可以用来表示物理量比如比力，可以做加法或和标量做乘法。如此形成了第一个例子：实数向量空间。

Objective To explore the clinical value of MRI and MR diffusion tensor imaging in amyotrophic lateral sclerosis.

目的探讨常规MRI检查和MR扩散张量成像新技术在肌萎缩侧索硬化症中的临床应用价值。

Objective To investigate the involvement of upper motor neuron in amyotrophic lateral sclerosis patients using diffusion tensor imaging.

目的采用DTI技术，定量检测肌萎缩侧索硬化症患者脑内上运动神经元的受累情况。

The computation of conformal rotational vector from rotational tensor and angular velocity is also studied, and the linearized formulation of angular velocity and acceleration is given.

为便于将该理论应用到多体系统动力学的建模中，还讨论了如何从转动张量和角速度中提取相应的保角转动矢量；以及角速度和角加速度的线性化问题。

We show that the differences between the results of our approach and the previous for the axial vector and vector vacuum susceptibilities are large, while that for the tensor vacuum susceptibility is small.

结果表明，我们的方法在计算轴矢量和矢量真空磁化率时与以前的方法相比数值差别是很大的，而张量真空磁化率的差别不大。

In studying the linear response of the dressed quark propagator in the presence of the variable external field, we derive a general expression for the vacuum susceptibility, based on the two-point external field formula in the Quantum Chromodynamical sum rule. The expressions we have derived for the calculation of vacuum susceptibility are model independent. Then we use the expressions to calculate the renormalised axial vector, vector and tensor vacuum susceptibilities.

接下来在研究夸克传播子在外场中的线性响应时，我们利用QCD求和规则两点外场公式推导出了一般的计算真空磁化率的公式（以变化的轴矢量外场为例），我们这里推导出的真空磁化率的计算公式是模型无关的。

The material's elastic constants for different orientations are obtained from the elastic constants along the axis of symmetry through the regular tensor transformation law.

不同旋转角度时材料的弹性常数是从晶轴坐标系下的弹性常数通过张量变换得来的。

I can do simple painting, carpentry and plumbing.

我能做简单的油漆、木工和修水管等工作。

The motivations, notations and outline of this work are also given in this chapter.

从这个意义上讲，这些时滞是无害的。然后用实例说明这三个定理的应用和互不包含性。