查询词典 alternating tensor

After reviewing the basic concept of general relativity, this introduction discusses its mathematical background, including the necessary tools of tensor calculus and differential geometry.

在审查了广义相对论的基本概念，讨论了其今年推出的数学演算，包括张量和微分几何的必要工具的背景。

On the journey, you'll discover how tensor notation relates to vector calculus, how differential geometry is built on intuitive concepts, and how freeduan.com variational calculus leads to field theory.

在旅行时，你将发现tensor表达式与矢量微积分有关怎样，几何学建立直觉概念多么不同啊，和freeduan.com variational微积分怎样导致原野理论。

By the end of college, we had courses on analytical mechanics, strength of materials, mechanics of structures, theory of elasticity, theory of plasticity, theory of vibration, fracture mechanics, fluid dynamics, finite elements, plates and shells, tensor calculus.

年底的学院，我们的课程分析力学，材料力学，结构力学，弹性力学，塑性理论，振动理论，断裂力学，流体动力学，有限元，板壳，张演算。

What this really means : Since we know that the mass-energy density tensor determines the geometry of space, not considering the intrinsic spin makes the theory incomplete.

定时空几何的观点看来，这是不够全面的。在广义相对论中，若要考虑物质自旋的作用

The tensor quality of energy density function, which contains coordinate vector, is mathematically proofed.

考虑到模型中能量密度函数含有坐标轴方向向量一项，该文对能量密度函数的张量性进行了严格的数学证明，并将VMIB模型初步应用到脆性材料的单轴受压破坏。

Effective - mass tensor ; density of state ; electron velocity ; crystal momentum ; quasi classical partical ; constant - energy surface

有效质量张量；态密度；电子速度；晶体动量；准经典运动；等能面

A technique suitable for diffusion tensor imaging at high field strengths is presented in this thesis.

我们提出一种适合在高磁场下使用的扩散张量影像技术。

The SNR of DTI data is relatively low, which degrades the quality of visualized tensor field data.

由于DTI数据的信噪比较低，会影响张量场数据可视化的效果。

The existent form of pure gravitational field part of matter result in an energy-momentum tensor in gravitational field, which should belong to a part of dark matter because of it can not directly be observed .

以纯引力场形式存在的物质是不能被直接观察到的，因此这部分物质应属于暗物质的一种。

The comparison of objective results and subjective evaluation of the filtered images indicate that the proposed filtering method can effectively remove noise and keep tensor field details unchanged.

客观结果比较和滤波图像的主观评估表明：该滤波方法可在保持张量场细节不变的同时有效地消除噪声，是磁共振扩散张量场的一种有价值的滤波工具。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48