反射

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 result obtained is that the reflection characteristics a re affected by electron number density, plasma thickness, frequency and tran smitting directi on of the incident wave.

计算结果表明：电子数密度大小、等离子体层厚度、入射波频率和入射角是功率反射系数的主要影响因素，适当调整其中任何一个，都可以达到降低功率反射系数的效果。

A conclusion is given that the radiance responsivities of the spectroradiometer obtained through these two kinds of diffusers are consistent within 1%.

同时利用两种漫反射板对此修正进行了实验研究，得到了采用两种漫反射板标定的光谱辐射计亮度响应度有很好的一致性(1%)的结论。

Its specula reflection weakened while scattering reflection reinforced.

此时其镜面反射能力减弱，漫反射能力增强。

It considers the differences in surface reflection in different image regions, separates the image into Lambert surface and specula surface, then reconstructs the shapes respectively, fuses the two results, changes the illuminant direction and power, generates new image.

该方法考虑了图象中各部分表面反射模型的差异，通过将图象各区域划分成朗伯表面和镜面反射，分别进行三维重建，然后融合这两个结果，改变光照方向和强度，投影生成新的图象。

When the viewpoint is changing quickly, the rendering algorithm ignores some details of the diffuse component, otherwise the scene is rendered more precisely. The Specula highlight is dependent of the viewpoint, it must be processed in real time. We present an algorithm to get rid of the area that does not contain specula highlight quickly and calculate only the area that contains the specula highlight. In order to calculate the specula reflection and refraction component, we presented a new raytracing algorithm based on the environment map transformation. The environment maps are constructed at the sample points of the scene in the preprocessing phase. We add depth information in the environment maps and generate the exact reflection and refraction intensity with the transformation of a few pixels.

对于表面光亮度漫射分量，由于它与视点无关，可以把面片按照光照细节的分布预剖分成层次结构，然后在实时漫游时根据场景变化的快慢决定绘制的细致程度；对于镜面高光分量，由于它与视点有关，必须实时处理，我们提出了一种快速高光裁剪算法，通过简单测试，去除那些不包含高光的区域，只处理包含高光的区域；对于镜面反射分量和折射分量，我们提出了一种基于环境映照变换的快速光线跟踪算法，预先在场景的离散采样点处建立环境映照，然后根据入射点的位置，把邻近采样点处的环境映照上相关象素处的可见点变换过来，求取反射分量和折射分量。

The study is for diffusely emitting, diffusely and specularly reflecting inner wall of tube and its bottom black body surface of a fictitious circle burner....

圆管壁为漫发射、漫反射镜反射混合分布，管底部为假想的圆形黑体辐射器。

According to the acoustic admittance curve of stapedius,we wrote down the differential equation of the acoustic reflex dynamic system,and deduced the corresponding transfer function.

针对镫骨肌声反射的声导纳变化曲线，建立声反射动态系统的微分方程，进一步推导出相应的传递函数。

Since the decrease of the acoustic stapedius reflex amplitude is mediated by the auditory efferent system in sound field, in clinical practice the function of the auditory efferents can be evaluated by testing the change of acoustic stapedius reflex amplitude with the stimulation of the wide band noise in sound field.

声场下白噪声刺激可致镫骨肌声反射幅值降低，临床上可以通过检测声场下白噪声刺激后镫骨肌声反射幅值的变化评枯听觉传出神经的功能。

Based on the technique of PIV,We calculated the light intensity of the bubble interface and discovered that the intensities of lighr reflected or refracted twice succeedingly abide by the rules of geometric series , and the light will disappear after reflecting or refracting 4 times by the bubbles.

基于粒子成像测速的流体可视化技术，根据菲涅耳公式计算了入射到水中气泡界面的光强，得出点光源连续两次反射或折射的光强具有等比数列的规律，光线在气泡界面反射、折射4次就变成完全偏振光且光线几乎消失。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。