The device for forestation by fixing dry sand comprises a plurality of water containers and gratings for fixing dry sand, wherein each water container is fixedly connected with the grating;
干沙土固土植树造林装置，包括多个聚水容器、用于固定干沙土的格栅，所述每个聚水容器均与格栅固定连接；
And that in Turin there are people who sleep on the pavements, over warm cellar gratings.
在都灵，有人睡在大街上，蜗居在地下室格子间。
Graduations manufactured with the SUPRADUR process act optically like three-dimensional phase gratings, but they have a planar structure and are therefore particularly insensitive to contamination.
毕业与制造过程中的行为SUPRADUR像光学三维相位光栅，但他们有一个平面结构，因此特别不敏感的污染。
Optic fiber gratings sensor has many unique advantages, and is one of the most applied sensors in recent years.
光纤光栅传感器具有许多独特优点，是近年来应用较多的一种传感器。
It also represents the influences of aluminum film thickness on blazed efficiencies of the ruling diffraction gratings and provides proper ranges of the thickness factors.
实验研究了铝膜厚度对衍射光栅闪耀效率的影响，给出了铝膜厚度系数的最佳范围。
Firstly, basic transmission equation of transmitted light is given using coupled-mode theory in Fiber Bragg Gratings and physics meaning of every parameter is given.
本文第一部分运用耦合模理论推导了在光纤光栅中传播的光的基本传输方程以及给出各个参数的物理意义。
We offer ruled and holographic diffraction gratings.
我们提供常规和全息衍射光栅。
The principle and method to improve the diffraction efficiency of relief holographic gratings by plasma etch is presented in this paper.
本文提出了用等离子体蚀刻法提高浮雕全息光栅衍射效率的原理和方法。
The forming mechanism, diffraction efficiency and polarization characteristic of phase gratings written in cross-linked azobenzene copolymer films under different holography modes were studied.
研究了不同偏振全息模式下基于交联偶氮苯聚合物薄膜的相位光栅的形成机理、衍射效率和偏振特性。
The design principle and the fabrication process of color separation gratings are studied.
介绍了色分离光栅的设计原理，并对其制作工艺进行了研究。
This review describes the fabrication of silicon gratings and the applications in different fields.
本文介绍了硅光栅的制作及其在不同领域的应用。
The numerical results show that picosecond pulses can be compressed effectively, if the parameters of gratings and pulses were chosen properly.
数值结果表明，适当选择光纤光栅及入射脉冲的参数，脉冲能够得到有效压缩。
To obtain larger dispersion, chirped fiber gratings with longer length and smaller chirp coefficient are required.
结果表明要获得较大的色散，要求光纤光栅有较长的长度和较小的啁啾。
The characteristic of arrayed waveguide gratings is analyzed with the linear systems theory and the optical grating equation is educed.
运用线性系统理论分析了阵列波导光栅的模场特性，导出器件传输的数学模型即光栅方程。
The law of variation in the signal with relative placement deviation of the two gratings is analysed and proved sufficiently. And a series of the equations about this law is given.
在此其础上，对“光栅付相对位置偏差——信号质量”变化规律进行了全面的分析验证，得出一系列表示这种变化规律的传递公式。
In this paper, the factors of affecting thermal fixing efficiency, and lifetimes of fixed gratings under both illumination and dark conditions are analyzed theoretically.
采用红光对单、双掺铌酸锂晶体中全息光栅的热固定效率及光擦除和暗存储寿命的特性进行了深入的实验研究。
The reflection spectrum, time delay, and group velocity dispersion (GVD) of the gratings are analyzed.
并对此种光栅的反射谱，时延及群速度色散进行了理论分析；
By using a laser cavity which consists of only two gratings and a resonant reflector, a N2-laser-pumped dye laser with a spectral linewidth of 1.3 GHz has been made.
利用仅由两个光栅和一个共振反射器组成的激光腔，就能得到线宽为1.3千兆赫的由N_2激光泵浦的染料激光。
Through the nonlinear coupling interactions between atomic waves, the structure appears as the matter wave gratings, and diffracts its surrounding atomic waves.
通过原子波之间非线性耦合相互作用，这种结构可以表现为物质波光栅，对其周期的原子波产生衍射现。
A novel all fiber interleave filter using Mach Zehnder based sampled fiber gratings was proposed and fabricated.
提出了一种基于光纤马赫曾德尔干涉仪和取样光纤光栅的新型全光纤梳状滤波器。
We investigate the fields of Gaussian beams scattered by reflection gratings and show that their behavior may differ considerably from that predicted by geometrical considerations.
本文研究了反射光栅散射的高斯光束的场分布，证明它们与几何预示的散射场有很大区别。
Optically induced anisotropy gratings and surface gratings on azobenzene polymer films are studied.
研究了偶氮苯聚合物的光致各向异性光栅与表面光栅。
In this paper the study on the dispersion theory, design, manufacture techniques, and efficiency test methods of diffraction gratings were made in a deep way.
本文对衍射光栅色散理论与光栅设计、制作工艺和效率检验方法做了较为深入的研究。
The holographic volume gratings and reflection holograms having high diffraction efficiencies and signal noise ratio are also fabricated in experiment.
实验中制作出了高衍射效率和信噪比的体积全息光栅和反射全息图。
The new development of flat field holographic gratings, monographs holographic gratings, toroidal holographic gratings, laser holographic gratings and blazed holographic gratings are discussed.
介绍了平场全息光栅、图象全息光栅、超环面全息光栅、激光全患光栅和闪耀全息光栅的新进展。
Dense wavelength division multiplexing (DWDM) is the key technology in optical fiber communication, and the arrayed waveguide gratings (AWG's) have wide applications in WDM systems.
密集波分复用(DWDM)是光纤通信中的关键技术，而阵列波导光栅(awg)在波分复用系统中有着广泛的应用。
The ultralinear characteristics of a bistable liquid crystal electro-optic modulator and the use of it for making various special amplitude gratings and the halftone screen are introduced.
本文介绍了双稳液晶电光调制器的超线性特性以及它在制作各类特殊振幅光栅和半色调屏上的应用。
The control system of the VLS gratings ruling engine is given also and a ruling experiment of the VLS gratings is made to examine the novel method.
提出了采用相位扫描方法加工变栅距（VLS）光栅的基本原理，给出了VLS光栅刻划机的控制系统，并通过刻划实验对这一新方法进行了验证。
The Polarization noise caused by gratings and Polarizers has been computed and mea- sured.
由于光栅引起的极化噪声与光栅的衍射效率有关。
The Polarization noise caused by gratings and Polarizers has been computed and mea- sured.
由于光栅引起的极化噪声与光栅的衍射效率有关。
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