查询词典 tensor form

Numerical model tests show that the method proposed by this paper is as accurate as nine-point finite-difference when permeability tensor is in diagonal form, and it can simulate more complicated cases when permeability is in full-tensor form.

CVFE网格是非正交网格，本文混合运用有限差分和有限元方法计算折算压力梯度，得到与有限差分和PEBI网格不同的离散形式，提出了根据流量符号判定上游的方法，使模型更为合理。

Numerical model tests show that the method proposed by this paper is as accurate as nine-point finite-difference when permeability tensor is in diagonal form, and it can simulate more complicated cases when permeability is in full-tensor form. Its application prospect is more extensive in fine detailed reservoir simulation.

模型计算表明，对于形式简单的对角渗透率张量，本文方法可以与九点差分格式相比，精度是可靠的，并且该方法还能模拟完全各向异性渗透率张量，对于精细油藏数值模拟，其应用范围将更为广泛。

The mathematical form of material energy-momentum tensor is the same as a sum of the energymomentum tensor in elastic material and the Maxwell stress tensor in electromagnetic field Moreover, under infinitesimal symmetrical transformations, the infinitesimal invariance condition gives a balance of the field variables and material energy-momentum tensor.

另外，在无穷小对称变换条件下，它指出—种场变量与物质能量-动量张量的平衡关系。

They conclude their paper by showing how some partial differential equations and physical law can be expressed in tensor form.

他们在文章的末尾指出了如何把某些偏微分方程及物理规律表示成张量的形式。

Tensor form of permeability of fractured rock was studied.

以FracFlow为基础编制了相关的计算机程序。

According to the discrete material balance equation of control volume,a new numerical scheme based on PEBI grid and CVFE grid is provided,where absolute permeability is in tensor form.

根据所建立的单个控制体离散形式的物质平衡方程，基于 PEBI和 CVFE网格，采用任意形式的渗透率张量，建立了相应的数值算法。

Deducing material balance equation for unstructured grids based on percolation theory, where absolute permeability is in tensor form.

对CVFE网格，用有限元方式表达折算压力得到相应的数学模型，提出了新的上游权准则，使模型更为合理。

According to the discrete material balance equation of control-volume,a new numerical scheme based on PEBI grid and CVFE grid is provided,where absolute permeability is in tensor form.

摘 要：根据所建立的单个控制体离散形式的物质平衡方程，基于PEBI和CVFE网格，采用任意形式的渗透率张量，建立了相应的数值算法。

First, a non-negative tensor factorization algorithm is improved by imposing sparseness constraints on it. Secondly, the bispectral images of mechanical signals are obtained and stacked to form a third-order tensor. Thirdly, the improved algorithm is used to extract features, which are represented by a series of basis images from this tensor. Finally, coefficients indicating these basis images' weights in constituting original bispectral images are calculated for fault classification.

首先，改进已有的非负张量分解算法，加入稀疏度控制策略；其次，将机械振动信号的双谱图像堆叠为一个三阶张量；然后利用改进后的分解算法对该张量进行二次故障特征提取，得到代表局部特征的"基图像"；最后，通过计算得出基图像在构成原双谱图像中所占的权重，并将得到的权重向量用于故障分类。

Afterwards, using the spherical tensor form of many-electron atom Hamilton and the irreducible tensor theory, the relativistic and fine-structure energy correction to the non-relativistic energy of Boron-like atoms in the ground and the first excited states have been further investigated. A theoretically analytic way has been given as to the calculation of all the radial integrations and spin summations, which concern interactions such as orbit-orbit, spin-orbit, spin-spin and spin-other-orbit. Therefore, the whole process of calculating the many- electron atom energy structures has been explicitly revealed and the results are relatively precise and satisfactory.

在此基础上，利用多电子原子哈密顿算符的球张量形式和不可约张量理论，进一步研究了类硼离子基态和第一激发态非相对论能级的相对论修正和精细结构，给出了轨道-轨道、自旋-轨道、自旋-自旋、自旋-其它轨道等相互作用所涉及的所有角向积分和自旋求和的解析计算方法，清晰地展示了多电子原子结构计算的过程，得到了较为精确的理论计算结果。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。