Introducing the Darwin's method of treating x-ray diffraction in crystals into Bragg diffraction for multilayer structure, a series of analytical expressions are obtained, which can be used to calculate the reflectivity, the Darwin's width, the minimum number of periods and the energy resolution.

將晶體動力學(xué)衍射的Darwin理論運用到多層膜對稱Bragg反射中好大好爽好湿美女在线视频，給出了一系列解析表達(dá)式，可計算強度比欧美一区在线视频导航、反射線角寬度H无码动费视频在线观看、最小周期數(shù)及能量分辨率等。

Operation. The call sign shall be sent for identification purposes at the beginning and at the end of each period of sending and whenever the frequency or the class ofemission is changed.

乙 在每段發(fā)送的開始及結(jié)束時必須發(fā)出電臺呼號以作識別美女视频黄软件，而每當(dāng)射頻或發(fā)射類別有所改變時欧美老熟妇AAAAAA农民，亦須發(fā)出電臺呼號。

I Date of transmission; The times (in Co-ordinated Universal Time) during each day of the first and last transmissions from the Station; Frequency band; Class of emission

在每段發(fā)送的開始及結(jié)束時必須發(fā)出電臺呼號以作識別在线黄片av播放，而每當(dāng)射頻或發(fā)射類別有所改變時国产xxxx在线播放，亦須發(fā)出電臺呼號。

M4 (M4A1) fast speed, small recoil,better stability, often in close-in to play a lot of advantages.

M4（M4A1）射速快午夜情深一级大黄片视频，后坐力小午夜免费性爱视频，穩(wěn)定性較好，經(jīng)常能在中近距離發(fā)揮出很大的優(yōu)勢国产第一页屁屁影院。

Since the multiple scattering should be considered, the scattering problem of many-cylinders is more complicated than single cylinder. By using scattering matrix method to solve the scattering problem of many-cylinders, first we have to express the incident fieldand scattered field by special function（for example, Bessel function and Hankel function）under cylindrical coordinate, then use the addition theorem of special function to get a linear system of equations to relate the incident field coefficients and scattered field coefficients. The incident and scattered field coefficients for every cylinder can be solved from the linear equations by matching electromagnetic boundary condition pointwisely.

單顆圓柱散射體的散射場解析解很早就被解出欧美视频经典亚洲，而多個圓柱陣列的散射場問題因為涉及到入射光在圓柱與圓柱間的多重散射看亚洲BBBwBBBwBBB，故散射行為較單顆圓柱的散射復(fù)雜亚洲性免费，因此圓柱陣列的多重散射問題需要利用加法定理來處理；散射矩陣法的主要精神即是先用圓柱座標(biāo)下的特殊函數(shù)對平面波和圓柱散射體的內(nèi)外域電磁場做無窮級數(shù)展開黄色一级毛片网站AAAAAAAAAA，再藉由特殊函數(shù)的加法定理將所有圓柱散射體的展開中心移到同一個展開中心黄网站18，最后可以得到一組連結(jié)整個散射系統(tǒng)的入射電磁場系數(shù)及散射電磁場系數(shù)的線性方程組，將該組線性方程配合電磁場在散射體邊界的連續(xù)條件艹久视屏，便可分別求出圓柱陣列中各個圓柱體的內(nèi)部電磁場與外部散射場日韩综合一区视频在线91，再利用線性疊加原理即可求得整個圓柱系統(tǒng)的全域電磁場分布男人天堂一道本在线视频。

The diffraction phenomenon of grating is simulated by use of the MATLAB software, and the curves of its frequency response characteristic are plotted.

運用MATLAB軟件對該光柵的衍射現(xiàn)象進(jìn)行了仿真，并繪制出其幅頻特性曲線1024手机在线看片基地。

This is when the ejaculate appears at the base of the penis instead of the tip.

這是當(dāng)射精出現(xiàn)在該基地的陰莖而不是尖端18岁免费在线观看黄。

It is also possible that some sperm is released from the penis well in advance of the actual ejaculation.

在實際射精之前有一些精子游離出陰莖也是有可能的。

All the other wavelengths will emerge as either elliptically or circularly polarized light.

所有其它波長的光將以橢圓偏振光或圓偏振光出射国产在线观看你懂。

In this paper, the research on vignetting is done and a formula for vignetting about field angle18禁止黄片免费观看、entrance window, entrance pupil and the distance between them is deduced.

文中對漸暈做了一些研究，并推導(dǎo)出一個漸暈關(guān)于視場角66j8影院在线视频、入瞳黄色网站免费别的女教师、入射窗以及兩者之間距離的解析式。