反射

Using the dynamical reflexion theory,the selective reflection characters of cholesteric liquid crystals are analyzed.

利用动态反射法对手性液晶材料的选择性反射特性进行了分析。

They are reflexive, just like most people typically flinch without thinking about it, reflexively, when startled.

他们对此有反射性，正如大多数人受到惊吓的时候，反射性地，不加以考虑就退缩了。

These options control the number of times a ray can reflect/refract before it is removed from further calculations.

这些选项控制光线可以反射/折射的次数，在进一步计算之前这些反射/折射就要计算完成。

As the orientation of optical axis is arbitrary, the polarization states and the amplitudes of the o ray and e ray and the refracted ray were given, and the theoretical expressions of the reflectivity and the transmissivity representing energy relations between the rays were obtained, which provide a theoretical basis for developing and applying crystal devices.

在晶体光轴取向任意的条件下，给出了反射的o光、e光以及折射光的偏振状态和振幅以及表明各光束间能量关系的折射率和反射率的理论表达式，为晶体器件特性的研究提供了有力的理论工具。

Incident shock wave ; regular reflection ; Mach reflection ; laminar boundary layer ; separation

入射激波；规则反射；马赫反射；层流边界层；分离

It was observed that there are two types of shock interaction from the edge of the reflector which are known as the diffraction shocks. For weaker shock diffraction, both shocks are crossing each other which is corresponding to the regular reflection.

在绕射震波的型态观察方面则有交叉和不交叉的两种结果：当绕射震波强度较强时，绕射震波不交叉，为马赫反射的结果；绕射震波强度较弱时，则绕射震波相交叉，为正规反射的结果。

The image characteristics of circular structured light stripe in a micro-object inner surface vision inspection system are analyzed and the false stripes can be divided into two kinds of diffuse reflection and regular reflection.

分析微小物体内表面视觉检测系统中圆形结构光光条图像特徵，将干扰光条分为漫反射和镜面反射两类。

Numerical results demonstrated that there are three kinds of the instability for the under-expanded supersonic jets according to their shock cell structure patterns:(1) the regular reflection shock cell with a single shear layer,(2) the Mach reflection shock cell with two shear layers and (3) the curved Mach stem with a relatively high expansion ratio.

计算结果表明欠膨胀超声速射流的失稳机制根据射流激波结构的特征可分为3种失稳模式：具有规则反射激波结构和单一剪切层特征的射流不稳定性；带有马赫反射激波结构和双剪切层特征的射流不稳定性；具有弯曲马赫杆和高度欠膨胀射流的不稳定性。

In this few decades, scholars paid attention to the research of Bragg reflection in regular waves. Thus, this study aimed to discuss the Bragg reflection in irregular waves. EEMSE is a numerical model based on evolution equation for mild-slope equation developed by Hsu et al.

以往关於系列潜堤之布拉格反射研究，在规则波方面的理论、数值研究与分析都渐趋成熟，而实际应用於海岸保护时需考虑波浪为不规则波，因此本文之重点在於探讨不规则波下之布拉格反射。

The comparisons show the present model are in agreement with available theories and experiments.In particular, the model is further applied to investigate the wave reflection properties of regular waves propagating over sinusoidal topography on sloping beaches.

此外本文探讨 Booij's ramp (1983)不同坡度底床地形及欧等人(2007)沙涟试验造成反射波之反射率，结果显示於适当坡度范围内本文模式可呈现优於传统缓坡方程式计算结果并与试验结果相近。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。