The fluorescence spectra of Eu~(3+) may be used to study the structure ofcompounds.The band shift of Nd~(3+) in its absorption spectra,the red-to-orangeintensity ratio of the Eu~(3+) emission(~5D_0→~7F_2)/(~5D_0→~7F_1)and the yellow-to-blue intensity ratio of the Dy~(3+) emission~4F_(9/2→~6H_(13/2)/~4F(9/2→~6H(15/2)intheir fluorescence spectra may be used to study the degree of covalency of theLn-O bond and its relation with the electronegativity of M in Ln-O-M.

本文介紹了利用 Eu~(3+)的熒光光譜研究化合物的結(jié)構(gòu)综合操逼网；利用 Nd~(3+)的吸收光譜的譜帶位移和 Eu~(3+)的熒光光譜的紅橙發(fā)射強度比(~5D_0→~7F_2)/(~5D_0→~7F_1)和 Dy~(3+)的黃蘭比~4F_(9/2→~6H_(13/2)/~4F_(9/2→~6H_(15/2)91视频首页，了解Ln—O—M中 Ln—O 化學(xué)鍵的共價程度以及 M 的電負(fù)性對共價程度的關(guān)系亚洲精彩视频一区二区三区；利用吸收光譜、熒光光譜和磁化率研究稀土的價態(tài)以及利用磁化率研究化合物的組成日韩综合精品1页在线观看。

For frequency information fluid identification technology:the basic theory of fluid identification based on frequency information has been introduced,for inner and external factor affecting frequency,some steps have been proposed to attain reserved amplitude and frequency analysis data with high resolution,high S/N ratio;through the comparison of time-frequency analysis method, the high accuracy time-frequency analysis method has been selected to extract time-frequency attributes;the analysis method flow of common single frequency fluid identification has been proposed,according to the data of full frequency band,several anomaly zone modes of common single frequency attribute have segregated; incorporating converted wave and compression wave,fluid identification method based on PS wave combined time-frequency analysis has been proposed;the AVO property of various fluid type in frequency domain has been studied;the generalized fourier analysis method,Proni absorption filter has been introduced,and researched for anti-noise and for the seismic processing interpretation flow.The above technology have been applied to fluid identification of organic reef in WBT area in the east of Sichuan and fluid identification of clastic rock in GUANGAN area in the middle of Sichuan,the results show that the above methods are effective.

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Concrete components have flaws, such as loose, hole, slit band and so on. These flaws not only lead to the change of acoustic velocity, but also have strong absorption and attenuation action to the acoustic wave. It is an effective method to detect engineering quality of concrete components by using acoustic velocity CT and attenuation CT combined detection technology.

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Based on chirality electromagnetism theory, the models of intrinsic chirality and screw structure which making carbon nanotubes wave-absorption in millimeter to centimeter wave band has been presented.

根據(jù)手性電磁理論另类激情视频，碳納米管的本征手性模型和螺旋結(jié)構(gòu)模型會產(chǎn)生毫米波段或厘米波段的吸收。

Erbium-doped glass showing the wider 1.5-μm emission band is reported in a novel oxide system TeO2-WOa-Nb2O5 and their thermal stability and optical properties such as absorption, emission spectra, crosssections and fluorescence lifetime were investigated.

[1]紹興托普信息職業(yè)技術(shù)學(xué)院基礎(chǔ)學(xué)部国产iGAO在线，浙江紹興312000 [2]杭州師范學(xué)院理學(xué)院物理系日本.www，浙江杭州310036 [3]寧波大學(xué)信息科學(xué)與工程學(xué)院91超碰国产在线，浙江寧波315211制備了一系列碲鈮酸鹽玻璃85TeO2-（15 -x）Nb2O5-xB2O3-1%Er2O3（TNBx=0精品视频在线免费观看看， 3， 6东京热官网入口， 9404亚洲免费在线视频， 12， 15）黄色免费高清视频一区二区三区。根據(jù)Judd-Ofelt和McCumber理論这里只有精品在线国产，討論和分析了B2O3含量對摻鉺碲鈮酸鹽玻璃熱穩(wěn)定性及光譜性質(zhì)影響。

Thirdly, we employ the air-core PCF structure to overcome the shortage of high material absorption loss of plastics. So mostly light wave can propagate in air core once the light frequency falling in the bandgap band.

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In the second chapter, during the study of compound x-ray refractive lenses, diffraction function of compound lens is derived in the light of refraction and absorption effect and the design theory of X-ray is deduced using diffraction theory in connection with the characteristic of X-ray band.

在第二章X射線聚焦組合透鏡的研究中亚洲手机小视频网站，針對X射線波段的特性超污污网站，綜合考慮折射和吸收效應(yīng)得出組合透鏡的衍射屏函數(shù)，利用衍射理論推導(dǎo)出X射線聚焦組合透鏡的設(shè)計理論并進行結(jié)構(gòu)設(shè)計與微細加工制作技術(shù)研究国产视频自拍视频。