协变和逆变的区别对于张量的计算尤为重要，这往往会出现混合方差。
The distinction between covariance and contravariance is important for computations with tensors, which often have mixed variance.
在2008 ~ 2009年，研究人员对63名因爆炸而患有轻微脑损伤的现役军人进行弥散张量成像扫描，除了其中一名，其他62名军人的常规扫描都没有发现异常。
In 2008 and 2009, the researchers performed diffusion tensor imaging on 63 men who had recently sustained mild traumatic brain injuries from blasts; all but one had normal results on a standard m.
为了进行对照，还有21名最近同样经历过爆炸，但没有脑震荡症状的军人也进行了弥散张量成像扫描。
R. I. For comparison, 21 control subjects were also scanned — men exposed to blasts recently but with no symptoms of concussion.
这种特殊形式的核磁共振成像技术被称为弥散张量成像，对这种技术的也用来提高诊断脑震荡的精确度。
The special M.R.I. technique, known as diffusion tensor imaging, is also being studied to help improve the diagnosis of concussions.
这种特殊形式的核磁共振成像技术被称为弥散张量成像，对这种技术的也用来提高诊断脑震荡的精确度。
The special M. R. I. technique, known as diffusion tensor imaging, is also being studied to help improve the diagnosis of concussions.
如果说特殊目的载体就是为缓解市场的紧张量身打造的，那它还没有达到它的目的。
If the SPV was designed to calm nerves, it hasn't worked yet.
电场和磁场可以用统一的电磁张量来描述。
Magnetic field and electric field is described by unified electromagnetic tensor.
在最一般的情况下，热导率是一个具有六个分量的张量。
In the most general case the thermal conductivity is a tensor with six components.
混凝土墙、钢梁和张量组成结构，用自身美学标识立面，在工业和现代的建筑外观上表现螺栓和焊接的结构。
Concrete walls, steel beams and tensors compose the structure that marks the facade with its own aesthetics, showing the bolts and welding on an industrial and contemporary look.
可是，另外还有一个可能取代广义相对论的理论称为张量-矢量-标量引力(TeVeS)了，它与我们的新发现有冲突。
However, another alternative theory, called tensor-vector-scalar gravity (TeVeS), does conflict with the new findings.
本文应用张量电网络理论所建立的无刷励磁机通用仿真模型，对11相无刷励磁机进行了额定工况及故障工况的仿真研究。
The paper analyzes the rated case and fault cases of a 11 phase brushless exciter by general simulation model of exciter, which is based on Kron's tensor circuit.
研究人员使用“扩张量”核磁共振技术，即描述组织中的水分子的扩散或者置换程度。
The researchers used 'diffusion tensor' magnetic resonance imaging (MRI), which depicts the diffusion, or displacement, of water molecules through tissue.
提出了多磁化中心锁式态工作的非均匀磁化系统中铁氧体张量磁导率的概念。
A concept of the tensor permeability in the multicenter-magnetized inhomogeneous magnetized systems in a latching state is proposed.
本文讨论了这类非互易旋光张量下的波矢面及简正模的基本形式。
This paper discussed the basic form of the wave-vector surface and normal mode of nonreciprocal gyrotropic dielectric tensor.
此外，在实验中，还直接观察到了轻空穴对电导张量分量的贡献。
In addition, we directly observe the contribution of the light hole to the conductivity tensor component.
通过把高阶张量写成若干逆变和协变矢量的乘积，直接从变换入手，给出了定义高阶张量协变导数的另一种方法。
This paper discusses another way, which is rewritten as product of a few contravariant vectors and covariant vectors, to define higher order tensors covariant derivative through transformations.
根据能量原理，推导出了一个求解等效总体损伤张量的公式，适用于多个损伤张量求和。
A formula to solve the equivalent global damage tensor by summing up the damage tensors of individual joint sets is derived based on the energy principle.
微分几何包含这样的概念：纤维束和流形上的微积分，特别是矢量与张量微积分。
Within differential geometry are the concepts of fiber bundles and calculus on manifolds, in particular, vector and tensor calculus.
最后，还介绍了单晶化学位移张量的常规测量方法。
The common methods for measuring single crystal chemical shielding tensor are also discussed.
计算了流体力学相互作用对转动扩散张量的二体贡献和首项三体贡献。
The two-body and leading three-body contributions of hydrodynamic interaction to the diffusion tensor are calculated.
主要包括两视点结构中基本矩阵及三视点结构中三焦张量的计算。
It consist of computation of fundamental matrix in two views and of trifocal tensor in three views.
从而可以得到不同扩散张量的适用范围。
Accordingly, the applicable range for these diffusion tensors is acquired.
这种分解可以给出高阶张量协变导数的另一种定义。
This decomposition may give another definition of high order tensor's covariant derivative.
提出了基于数学形态学的幻想脸重建算法，设计了表达图像特征的张量结构，介绍了幻想脸的重建步骤。
The algorithm designed a tensor structure to represent image features and shows the detailed process of hallucinating face reconstruction.
对于三维晶体，其介电参数为与晶体结构以及外电场频率密切相关的张量。
Meanwile , the corresponding relationship of the crystal structure and model parameters is solved.
提出了应力张量与位移梯度张量的对偶关系。
A dual relationship between stress tensor and displacement grads tensor is presented.
讨论了一个二维黑洞的能量应力张量的相干态表示，并将这样得到的结果与已有的结果进行比较和讨论。
In this paper we turn out the coherent-state expression of energy-momentum stress tensor in two dimensional Schwarzschild black holes. The results have been discussed as well.
讨论了一个二维黑洞的能量应力张量的相干态表示，并将这样得到的结果与已有的结果进行比较和讨论。
In this paper we turn out the coherent-state expression of energy-momentum stress tensor in two dimensional Schwarzschild black holes. The results have been discussed as well.
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