查询词典 diffraction

Combining the electro-optically cavity-dumped technology with MOPA system could realize the laser output with nanosecond pulse width, gigawatt peak power and nearly diffraction limited beam quality.

通过将电光腔倒空技术和MOPA结构放大器系统相结合可以实现ns级脉宽、GW级峰值功率以及近衍射极限的高光束质量激光输出。

Firstly, we research the Vlasov antenna with reflector mainly. A new method to calculate the radiation of the antenna is founded with Vectorial Theory of Diffraction, and the corresponding program is made. The reflective characters of Vlasov antenna are studied with Moment Methods, and the results show that the total reflected energy is less than 0.25%. The radiation patterns of the antenna are analyzed, and the formulas to estimate the wave beam parameters and to design the antenna are provided. The feasibility of radiating high-order modes by Vlasov antenna is also discussed and verified. The hermetization of the Vlasov antenna is researched and the results show that with such kinds of hermetization the antenna can work under gigawatt level. The design of the mode converter from TEM to TMoi is studied, which is useful when the TEM coaxial mode is radiated by Vlasov antenna. At last, the flared-end Vlasov antenna is also discussed.

在Vlasov天线方面：用矢量绕射理论建立了天线辐射场的计算模型并编写了计算程序，该程序计算结果在主瓣上与实验测量吻合良好，近旁瓣也基本一致；利用矩量法计算了天线的反射系数，表明该天线有较小的反射，总的能量反射小于0.25％；详细分析了天线的辐射特性，给出了天线辐射波束相关参数的估算公式和天线设计公式；进一步研究和论证了Vlasov天线辐射高阶轴对称模的可行性；对天线的密封方式和功率容量进行了讨论，结果表明在不需很大密封罩的情况下可以获得GW级的功率容量；为了用Vlasov天线辐射同轴TEM模，研究了TEM-TM_(01)模式转换器的设计，得到了一些基本规律；最后，介绍和分析了带有锥形喇叭的Vlasov天线。

This paper suggests a new method for rapid and automatic measuring the spectral diffraction efficiency of gratings.

提出了一种快速自动测试光栅光谱衍射效率的新方法。

The results show that intensity of combined beams is closely related with diffraction efficiency and location of two gratings.

分析表明汇合级光强与两光栅具体的衍射效率和双光栅成像时的位置密切相关。

To solve the multipath effect , the NSS based on Geometrical Theory of Diffraction for approach landing systems is presented, including the methods that have been applied, and the simulation results for hangars problem.

针对进近着陆系统对于环境的影响十分敏感的问题，采用几何绕射理论仿真分析了进近着陆系统的多径效应，给出了跑道旁边的机棚造成多径问题的仿真结果，从而为评估环境对着陆系统的影响提供了一种有效的技术途径。

The synthesized MnO_2 material under different heat-treat temperatures were tested by X-ray diffraction and scanning electron microscopy.The results indicated that the MnO_2 material was granular and had particle size of about 200nm.

采用循环伏安法对MnO_2电极材料进行测试，在1mol/L Na_2SO_4电解液、-0.2～+0.8V扫描电位内，不同扫描速率下电极均表现出理想的电容特性，当扫描速率等于1mV/s时得到最大比容量

The traditional refitted ignition products (for example, high-pressure cylinder line without diffraction, refittedly-complicated products that mix the spark plug and ignition power) are the primang products with no dynamic adjusted ability, which can't meet different requirements of motor under different conditions, thus impossibly causing the motor to be in the best condition.

传统点火改装产品（如：无内阻高压缸线、改装用火花塞及仿冒点火王动力复合仪等产品）均为无动态调节能力的初级改装产品，无法动态满足发动机在不同工况下的不同需求，因而无法使发动机持续工作在最佳状态。

High-resolved X-ray diffraction measurements show that the crystal quality of high aluminum mole fraction(x=0.1) is poor and it may cause a large dark current. The window layer acts as a band-choice role. It induces a high responsivity and a wide response band for a higher aluminum mole fraction.

高分辨率X射线衍射仪对材料的测试结果表明，高铝组分(0.1)窗口层薄膜材料的晶体质量较差，导致暗电流增大，而其窗口层的窗口选择作用则可以得到较高的响应率和较宽的响应波段。

The selected area electron diffraction shows that the direction of exsolution lamellar structure is ( 15 3) which nearly parallel to (010). The uniform interference color may have different calcic content, it varies from place to place and from environment to environment.

受环境影响，结构层不一定绝对平行，表面也并不完全平坦，因而同一颗晶体的晕彩色可能变化多样，或出现有如地形图上等高线似的干涉色。

Diffraction and interference phenomenon in the halftone mask fine pattern forming process was analyzed.

针对使用半色调掩膜技术的TFT LCD玻璃基板曝光过程中的衍射和干涉现象进行了分析。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"