查询词典 delta function

The pseudo delta function in seismic method is used to simulate the electric dipole source in finite element simulation, In this paper, the author extend it into three-dimensional case from which singularity from source is eliminated, and also the the stability of the equation is remarkably.

把应用于地震模拟中的伪delta函数引入到可控源电磁法中的有限元模拟中，并把其扩展到三维情况下，用源周围的小块区域代替偶极子源，从而消除了源点的奇异性，提高了方程组的稳定性。

It turned out that hematopoietic stem cells be immortalized by constitutive Notch1 and Delta has the function as the mitogenic regulators of hematopoietic stem cells.

研究人员将活化形式Notch受体导入造血干细胞，使其获得了细胞因子依赖性的"永生"；另外，Notch的配体Delta、Jagged具有类有丝分裂因子作用，可保持造血干细胞的自我更新能力，促进其体外增殖。

However, its accuracy is not much high in interpolation. On the other hand, interpolation functions in the point interpolation method have delta function property, and it is convenient to apply the essential boundary conditions.

而点插值方法的插值函数具有Delta函数性质，可以很方便的施加本质边界条件，不利之处是在计算插值函数时矩阵易于奇异。

We studied the influence of single magnetic impurity on the spin orientation of an incident electron, the scattering barrier can be expressed by the Rashba Hamitonian and delta function.

研究局域化磁性杂质引发的散射势对入射电子自旋取向的影响，该势可用Rashbah哈密顿项表示。

The nature of the culture formation in Pearl caver Delta is seeking function and benefit. Its characteristic is commercial vulgar culture, Its structure consists of four factors: the culture of south of the Five Ridges, the culture of HongKong and Macao and the culture of the Western countries.

珠江三角洲文化形态论纲戢斗勇摘要珠江三角洲文化形态的性质是务实求利；其特征是商业俗文化；其结构由岭南文化、中原文化、港澳文化和西方文化四因素构成；其地位是有中国特色的社会主义新文化的"曙光"，是中华民族大一统文化的"中介"。

The calculated results indicate that the choice of the limiter function in TVD scheme has an important influence on the numerical simulation which is carried out on the delta wing flow structure.

计算结果表明： TVD格式中限制器函数的选取对于三角翼绕流结构的计算结果具有较重要的影响。

For functions of them ,the delta method implies the following result, proved in Section 14.1.4: Let denote a differentiable function of , with sample value for a multinomial sample.

为作用的他们，三角洲方法暗示以下结果，被证明在部分14.1.4：让表示一个能区分的作用，以样品价值为一个多项式样品。

Boundary polynomial point interpolation mesh-free method and boundary radial point interpolation mesh-free method were presented, based on polynomial basis and radial basis respectively for transient eddy current analysis, and their interpolation shape functions satisfy the Kronecker delta function and the essential boundary conditions can be directly imposed on the boundary nodes. An example on analyzing transient eddy current of a square metal column was set to prove the validity of the proposed methods, and a comparison on accuracy between BPPIM and BRPIM was analyzed as well.

运用多项式点插值法和径向基点插值法构造形函数，推导了适合于工程电磁场瞬态涡流问题的多项式基点插值边界无单元方法和径向基点播值边界无单元方法，这两种方法的空间插值形函数满足Kronecker delta条件，从而强加边界条件可以直接施加在边界点上，以金属长方柱的瞬态涡流分析作为数值算例，证实了两种方法的正确性和有效性，并对两种基类的点插值法进行了精度分析和比较。

Smooth pictures with a RGB delta arrangement Supports NTSC/PAL Built-in picture quality improvement circuit Up/down and/or right/left inverse display function LR surface treatment provides an easy-to-see display even outdoors Dirt-resistant surface treatment Narrow frame

与一个RGB三角洲安排支持NTSC / PAL制式平滑图片内置图像质量的改善电路上/下和/或左/右逆显示功能的LR表面处理提供了一个易于看到显示器，即使在户外越野性表面处理窄框

In modeling heavy tails,we focus on multivariate t distributions and derive the moment generating function of the quadratic approximation.Then we use Fourier transform,Chebychev's Inequality and numerical technique inversion to approximate VaR value of portfolio,compared with Cornish-Fisher Expansions normal model and Delta-Normal model.

在推导出多个外汇期权的投资组合的二次近拟的矩母函数表达式基础上，本文使用傅里叶变换、切比雪夫不等式、数值转换计算求出投资组合的VaR的值，并和基于多元正态分布Cornish-Fisher模型以及基于Delta-正态模型计算所得的VaR值了进行比较。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样