The algorithm simulates excitation wave propagating based on Huygens principle not only in homogeneous medium but also in inhomogeneous medium.
矢量仿真算法不仅可以实现基于惠更斯原理的兴奋波在均匀介质中的传播，也可以方便地仿真兴奋波在非均匀介质中的传播。
Based on the extended Huygens-Fresnel principle, the Hufnagel-Valley profile model of the turbulence which is dependent on altitude, and the wave structure function under all conditions of atmospheric turbulence, the mutual coherence function of quasi-monochromatic Gaussian Schell-model beams propagating in the slant path through turbulent atmosphere is derived analytically.
由广义惠更斯菲涅耳原理、随高度变化的Hufnagel-Valley湍流廓线模型以及波结构函数在任意湍流条件下的近似表达式，导出了斜程传输时准单色高斯谢尔光束互相干函数的解析式。
Based on the extended Huygens-Fresnel principle and the quadratic approximation of phase structure function, the theoretical modal of optical intensity distribution on the focal plane for focused hollow vortex beams with a Gaussian background propagating in turbulent atmosphere was investigated and obtained. The effects of atmospheric index structure constant C2n, topological charge, focal length and beam wavelength on optical intensity distribution on the focal plane were analyzed.
运用广义惠更斯-菲涅耳原理和相位结构函数的平方近似，研究了聚焦高斯空心涡旋光束通过湍流大气传输后在焦平面内的光强分布的理论模型，同时分析了不同大气折射率结构常数C2n、聚焦距离、光束拓扑荷和湍流外尺度对焦面光强分布特性的影响。
The main features of these methods are that they aren't limited by the descriptions of the travel-time and raytracing of the seism wave. They set out directly from the principle of Huygens and the Fermat theory and then descript the features of the seism wave fields by adopting the equivalent fore-waves.
这些方法的主要特点在于不再局限于地震波的射线路径描述，而是直接从Huygens原理或者Fermat原理出发，采用等价波前描述地震波场的特征。
Based on the extended Huygens-Fresnel principle and the quadratic approximation of phase structure function, we have derived the analyticl expression of the spatial degree of coherence for partially coherent flattened beams propagating through the slant turbulent atmosphere with the help of tensor integral, then analyzed the effects of different zenith angle, propagation distance, coherence of source and outer scale of turbulence on the spatial degree of coherence on the receiver.
基于广义惠更斯-菲涅耳原理和相位结构函数的平方近似，运用张量积分的方法导出了部分相干平顶光束通过斜程湍流大气传输后接收面光束空间相干度的解析表达式，分析了不同天顶角、传输距离、光源相干性以及湍流外尺度对接收面光束空间相干度的影响。
As an initial approach to the problem, Let's reconsider Huygens'principle.
作为探索这个问题的第一步，让我们重新考察惠更斯原理。
Let us now apply Huygens'principle to compute the distribution of light on the screen.
我们现在用惠更斯原理计算一下光线在屏上的分布状态。
In order to study the effect of different zenith angles, propagation distances, coherence of source and outer scale of turbulence on the spatial coherence on the receiver, based on the extended Huygens-Fresnel principle and the quadratic approximation of phase structure function, the expression of the spatial coherence for partially coherent flat-topped beam propagating through slant turbulent atmosphere was derived with the help of tensor integral.
为了研究不同天顶角、传输距离、光源相干性以及湍流外尺度对接收面光束空间相干度的影响，采用广义惠更斯-菲涅耳原理和相位结构函数的平方近似，并运用张量积分的方法，得到了部分相干平顶光束通过斜程湍流大气传输后接收面光束空间相干度的解析表达式。
Expression of Huygens'principle for active gases
激活气体中Huygens原理的表达式
It is a special and important conclusion of the propagation of light in the uniaxial crystal. In the paper, two analytic methods to prove this conclusion are given respectively from Huygens principle and Fermat's principle.
这是单轴晶体里光传播的特殊而重要的结论，本文拟对此结论分别从惠更斯原理和费马原理出发，给出两种解析证明。
A detailed explanation of the anomalous refraction in material with a negative refractive index using the Huygens principle is presented. The differences of the design of optical devices of the negative refractive material and that of regular material are also analyzed.
用惠更斯原理解释了负折射材料的折射规律，并分析了负折射材料制作的一些常用光学元件与传统材料制作的相应光学元件的不同作用。
According to Huygens Principle, the computation of the second rank field of a flat plane can be solved by calling the first rank field function twice, so ray trace is the key.
根据惠更斯原理，平板二阶场的求场可以转化为一阶场的迭加，因此射线追踪就是平板二阶场计算的关键。
According to Huygens-Fresnel principle, the distribution of light intensity for single slit Fraunhofer diffraction is deduced by method of summation of series in this paper.
根据惠更斯-菲涅耳原理，利用级数求和的方法，推导单缝夫琅和费衍射的光强分布。
The way is simple and visual, the physical thinking of Huygens-Fresnel principle is incarnated fully, it helps to understand the quiddity of single slit Fraunhofer diffraction.
该方法简单、直观，充分体现了惠更斯-菲涅耳原理的物理思想，有助于更好地认识和理解单缝夫琅和费衍射的实质。
Based on Huygens principle of wave propagation, a numerical simulation method on CFD software unstructured mesh was founded so as to calculate burning surface regression directly.
根据惠更斯波传播原理，构建了一种在通用CFD软件的非结构网格系统上直接计算燃面推进的数值方法。
Numerical results demonstrate the validity and accuracy of the proposed method. Next, the sheath helix model and Huygens principle are developed for investigating the scattering of plane wave by conducting finite helix.
数字结果表明了我们提出方法的合理性及准确性。其次，借助于sheath螺旋管模型和Huygens准则，本文进行了线性极化的有限长螺线管的平面波散射分析。
The general formulation of double refraction or internal double reflection with different directions of propagation vector and wave vector in a uniaxial crystal is analyzed in terms of the Huygens principle.
根据惠更斯定理，给出了单轴晶体内双折射与全内双反射的光线方向和光波法线方向的普遍公式。
The input signals of the equivalent spherical waves are expressed as spherical wave input filed array (SWIFA) according Huygens principle. Then the calculation speed is increased largely.
将各物体间的互偶处理为等效球面波照射，采用惠更斯原理，等效球面波激励信号可处理为球面波入射场阵列（SWIFA），大幅度提高了计算速度；
Based on the simplified solution, the Huygens'principle and its application is discussed.
文中据此对惠更斯原理及其应用作了比较深入分析和讨论。
In this paper, it is studied that the angular spectral method for electromagnetic wave propagation is equivalent to Huygens'principle.
证明了平面电磁波传播的角谱法与惠更斯原理是完全等效的。