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The relationship between acoustic wave direction,laser incident angle,and laser diffraction angle of TeO2 acousto-optical deflector with acoustic frequency was analyzed based on the TeO2 crystal acousto-optical characteristic and Dixon equations under abnormal Bragg diffraction.

根据晶体的声光特性以及反常布喇格衍射的Dixon方程,得出了氧化碲声光偏转器在反常布拉格衍射条件下的参量矢量关系。分析了超声波方向、入射光角度、衍射光角度与声波频率之间的关系。

X-ray diffraction, reflection high energy electron diffraction and Phi scan of grazing incidence X-ray diffraction with synchrotron radiation were employed to investigate the structure properties of ZnO thin film.

利用X射线衍射,反射式高能电子衍射和同步辐射掠入射X射线衍射φ扫描等实验技术研究了ZnO薄膜的结构。

The algorithm only needs to solve an ill-posed linear system and a well-posed minimization problem and requires only the knowledge of the near field measurements of the scattered fields due to point source fields at a finite number of incidence and observation points distributed over a limited aperture.

该算法只需求解一个不适定的线性系和一个适定的非线性最小化问题,而且只需要点源入射场的散射场在某个有限孔径中若干有限个入射和测量点上的近场测量信息。

The state of the expanding metallic vapor, 2-D temperature, density and ionization in target, is determined by the energy deposit of EB and the ionization rate due to injecting electrons.

其中根据入射电子束的沉积能量及入射电子的电离率等计算随时间变化的靶区二维宏观参数。

The transit time and gain curves are obtained in the simulation.

获得了光电子的倍增次数随入射时刻而变化,并在考虑了入射电子为一高斯电子脉冲的情况下,分析了选通脉冲的幅度、宽度和波形对选通特性的影响。

The accuracy of present numerical model is verified by the simulation of a rectangular harbor with constant water depth. For Taipei Harbor calculations, three incident wave directions, namely, WNW, N and NNE, together with constant water depth of 10m are considered.

接著考虑台北港第三期配置,使用三个波波浪入射方向与代表性水深(10m),配合港区码头位置的选定,计算入射波浪周期与波高放大因子的关系,同时由共振周期计算港域波浪场的分布情形,藉以了解台北港第三期规划案港池振荡的特性。

After deriving the equations of reflectance spectrum of compressional and shear waves for thin beds at an arbitrary incidence angle , the equations of reflectance spectrum of compressional wave for a thin bed are reduced at zero incidence angle .

该文在推导出任意入射入射条件下的多个薄层纵、横波反射系数谱理论基础上,进一步简化出了单个薄层垂直入射时的纵波反射系数谱计算公式,从而获得了在薄层条件下不同频率成分的纵波反射系数谱数学关系式。

When 1053 nm 20 ns Nd:YLF laser was used as pump in a 3∶1 inverse expansion system are using attenuators to adjust input energy in the rang of 2 to 92 mJ, the rules of transmitted energy and waveform versus input energy are acquired, and compared with the results of focusing pump.

以波长1053nm、脉宽20 ns的Nd:YLF激光器为光源,采用3∶1的缩束系统,通过衰减片调整入射光能量在2mJ—92mJ变化,获得了透射光能量和功率波形随入射能量变化的规律,并与聚焦条件下的结果进行了比较。

The number of iterations and multiplications required by this method is approximately 10% that required by the available methods when only one path is received and this will be further reduced to 2% that when two paths exist.

单信号入射时本方法的迭代次数和乘法次数约为同类方法的10%,双信号入射时的计算量进一步减小至同类方法的2%。

Using one detector and few electronic elements, the invention realizes detecting azimuth and pitch angle of incident beam in high speed, and large field of view. Beam-splitting for incident beam is not needed.

本发明中使用一个探测器及少量电子元件就能实现对入射光束的方位和俯仰角进行高速度、大视域的检测,并不需要对入射光束进行分束。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力