查询词典 gradient of scalar field

Using triple integral equation based on scalar Green function for forward modeling transient electromagnetic response to a 3 D anomalous body, a frequency response of electromagnetic field component has been evaluated first on frequency domain, then the evaluated results has been transformed into time domain by using fast numeric filtering algorithm.

用基于张量格林函数的体积分方程对三维异常体进行瞬变电磁响应的正演模拟，首先在频率域内计算电磁场分量的频率域响应；然后利用快速数字滤波技术将计算结果转换到时间域。

Firstly a fast direct computing 3kP algorithm in field was deduced,which only needed one inversion;the new double base number chain based on 1/2 and 3 could be integrated with high-speed direct computing 3kP and halving algorithm.Scalar multiplication based on the new chain only employed point addition,halving algorithm,triplication and direct...

在底层域推导出直接计算3kP的快速算法，该算法只需一次求逆；新设计的以1/2和3为基的双基数编码可结合高效的直接计算3kP和折半运算，基于该双基数编码的标量乘算法只涉及到点加运算、折半运算、三倍点和直接计算3kP，底层域运算复杂性得到降低，在NIST推荐的椭圆曲线上比Dimitrov算法效率提高70%以上，比Wong方法提高10%以上。

In the space without any electricity the static electric field can be described not only by scalar potential ,but also by vector potential.

讨论了在无电荷存在的自由空间，不仅可以用标势描述静电场，而且可以引用矢势描述静电场。

Based on the diffraction theory of the monochromatic scalar wave, an optical trap using a red-detuned small-hole diffracted light field is investigated.

以单色标量波衍射理论为基础，研究单色平面波由圆孔衍射产生实现冷分子光学囚禁的光阱。

Nonlinear Schrdinger equation of optical field in logarithmically saturable nonlinear media is derived firstly from scalar Helmholtz equation.

0引言近年来，光学孤子由于其独特的物理特性和广阔的应用前景，在光学领域引起了极大的关注[1~3]。

We also give a brief consideration about the renormalizability of NCQED. We should point out here that the reason why nonplanar diagrams appear in NCQED is thoroughly different from that in noncommutative scalar field theories.

最后我们还讨论了非对易规范场以及非对易规范场和费米场相互作用的最简单形式，对NCQED的两种不同处理方式以及NCQED的重整化等问题分别进行了研究。

The research work is mainly focused on the phase mask method, the characteristics of near-field diffraction of the phase mask are analyzed with scalar diffraction theory, and the properties of grating formation are studied specifically when the writting light beam incidents normally and slantly, respectively, with some important conclusions derived.

我们首先采用按理想波导模展开的方法建立了FBG中的模式耦合方程，并用模式耦合理论研究了FBG中的模式耦合现象，导出了FBG的反射光谱和透射光谱的理论表达式，采用数值模拟计算的方法研究了FBG的结构参数对其反射光谱特性的影响，得出了若干重要结论。

The mathematical model of the magnetic scalar potential of a system for a magnetic monopole and magnetic medium sphere are introduced We can solve magnetization, magnetizing field and force of this system by using the model.

通过建立磁荷与磁介质球系统磁标势的数学模型，从理论上构建磁荷与磁介质球系统的一般框架，利用该模型可以引导分析均匀磁场中磁介质球的磁标势，磁屏蔽以及均匀磁化铁球等问题。

On the numerical simulation platform of aerodynamic heating for aircraft with complicated shape developed by our institute, we realized the visualization of two and three-dimension data fields of structured grid and unstructured grid, drawing the nephograms and contours of scalar field and vector plots streamline of vector fields, and show the temperature distribution of structure fields as well.

VISC是利用现代计算机强大的图形功能把科学计算中产生的数字信息转变为直观的、以图像或图形信息表示的、随时间和空间变化的物理现象或物理量，从而形象地反映数据场量的分布情况，并提供交互处理工具与手段。

Besides finding the relationship between QNM of scalar field in this space-time background and time, we also got the difference between Quasi-Normal modes in AdS space-time and in asymptotically flat space-time.

我们还把此研究推广到了2+1维的随时间演化的BTZ黑洞，除了得到在这一时空背景中标量场似正规模与时间的依赖关系，还找到了AdS时空和渐进平坦时空标量场似正规模性质的区别。

We got alerted a couple of times while we were down south that HETs were on the way to bring us back up north because things were going to go hot again, but it was just rumors.

南下的途中我们不只一次得到警告说重型装备运输车将拉着我们重新北上，因为局势正在变得重新紧张起来，但这只是谣传。

It's the one where they find the ghost in the salt mine.

这一集是演他们在盐矿找到鬼