光线的

When propagating light\|ray passes through two fixed points in the gradient index mediums and a cuspidal variable\|point （at this point the trace equation of propagating light\|ray is non\|differentiable） at the borderline of two different GRIN mediums, the mathematical relationship, which the trace equation of propagating light\|ray and borderline equation of two different GRIN mediums should satisfy, is derived by the Fermat's principle and calculus of variation.

当光线通过梯度折射率介质中两个固定点和两个GRIN介质界线上的可动尖点（光线轨迹方程的不可微点）时，由费马原理和变分法运算推得传输光线的轨迹方程与两种不同GRIN介质的界线方程应满足的微分关系式。

It indicates that the extinction capability and concentration of bubble solvent can seriously influence the light absorption in some wavebands, bubbles can change the direction of light propagation and reduce the energy density, the transmission intensity and light energy decrease rapidly with the increase of times that the light passes through the bubbles, and bubbles′ floating nature can cause the uncertainty in the emergent ray direction and energy distribution.

结果显示：泡沫溶液的溶质/溶剂的消光能力、浓度等对特定波段光波的吸收产生关键影响；泡沫通过改变光线的传播方向，大大分散出射光线的能量密度；随着光线穿过泡沫液膜界面的次数增多，透射光强迅速衰减，透射能量迅速下降；其漂浮运动还将导致出射光线方向和能量密度分布的不确定性。

It then calculates the intersections of this ray and the imaginary sphere circumscribed by the particle quad.

然后计算球和光线的交点，如果没有交点的话，这条光线就被取消。

Considering the effect of the change of ambient light on the navigation system of the car, an image processing algorithm with adaptive dynamic threshold is proposed to track the change of ambient light and provide an anti-jamming way for the navigation system with short operating time required.

考虑到环境光线的变化会影响导航效果，提出了一种自适应动态阈值图像处理算法；该算法运算量小，能跟踪环境光线的变化。

Of, relating to, or arranged like rays or radii .

光线的，射线的属于或关于光线或辐光线的，象光线或辐光线一样排列的

According to the spatial coherence, a fast algorithm for ray tracing is proposed for rendering implicit surfaces.

根据光线的空间相关性，本文提出了一种基于图像空间剖分的隐式曲面快速光线跟踪算法。

Ray depth specifies the maximum number of times a light ray can be reflected and, or refracted and still cause an object to cast a shadow . Transparent objects between those points in which the ray changes direction will have no affect on the light ray's termination.

光线跟踪深度决定了一个光线在让一个物体产生阴影之前，可以被反射或者折射的最大次数，在光线改变方向的点之间，透明的物体将不会对光线的终止产生作用。

When solar cells are absorbing light, the amount of light gathering depends on the size of the solar cell and it still causes light reflection.

因为太阳能电池在吸收光线中，光线的面积必须是由太阳能电池本身的面积去做考量，并且光线会有反射的情况发生。

At last, all related problems due to ship type and towing speed influencing the quality of captured images and results were discussed. A ship model with V-shape bottom and protruding keel might cause some disadvantages for PIV measurements. The use of longer laser light ducts extending deeper is a possible solution. A ship model with light yellow paint will cause the unproportionate of light and will cause white background on captured images. It is suggested to re-paint the ship model in black or dark colors to solve this problem. In high-speed test conditions, a ship model's bow waves entrain large amount of air bubbles into water and those bubbles will block the view of camera causing some random black spots in the images. Thus, it is necessary to remove the useless black spot data and repeat the same test condition if statistics requires enough number of images.

本文讨论建立此系统之技术及实验方法，设备的架置方式和配置为一可调性调整之开放式架构，质点施放方法以一自制的施放架於实验前先布置於测试段中，并制定一实验流程规范，再分别针对实验所得滑航型及排水量型船模的流线方向及切流线方向各不同位置及船速之速度进行流场分析；实验结果发现不同船型会造成不同的实验困难：船形上突起之龙骨及V形船底会遮住照明光线，可利用较深之导管调整光页角度改善；而浅色船模表面会造成光线的不均匀，可以更改船模涂装颜色改善；高速实验的气泡会不定点的遮住光线，须先除去无资料区域并使用更多资料组数来改善。

As to straight texels, we study the local relative coordinate equation of a light line in a texel coordinate system, and the concrete shape of light line when mapped to texel space, so that quick check could be made for the intersection of light line with hairs. This becomes the straight texel rendering method of global smoothness for all hairs and can be used to long hairs.

对于直形纹元，研究了直纹元体内光线的局部相对坐标方程，和影射到纹元空间后的具体形状，并给出拟合纹元空间中光线曲线的方法以及它投影到纹元底面的曲线的形状，以便使用快速方法判断光线与头发的相交情况，进而给出在整体上具有头发光滑效果的直纹元的绘制方法。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了