The result of UV-visible spectroscopy show that the absorption band of the titanium dioxide hydrosol is extend to visible light region, what'more the absorption band in ultraviolet region is strong and wide.

紫外-可見光漫反射吸收光譜分析表明，該納米二氧化鈦水溶膠在紫外光區(qū)具有強而寬的吸收帶黑人与中国妞无码AV，且其吸收邊(500nm)擴展到了可見光區(qū)国产在线com，擴展了對光譜的吸收范圍。

The absorption spectrum center wavelength of dolomite is near 232 μm is shorter than 235 μm of limestone,and thus RBD7 and RBD8 can be employed effectively to identify dolomite and limestone,respectively. Felsic rocks show AlOH and Fe3+ absorption characteristics in the VNIRSWIR region,while the maficultramafic rocks show Fe2+ and Fe,MgOH absorption features,hence the use of different valence state of iron and secondary minerals can distinguish them:ASTER band2/band1 represent Fe3+ distribution,ASTER band2/band1 represent the Fe2+ distribution,RBD6 can estimate the AlOH mineral abundance. Psammitic/pelitic schist containing phengite,chlorite,stilpnomelane,as well as the weathered surface covered by clay minerals,exist characteristic absorption spectrum in the 221 μm(band 6),and has a high reflectance in 165 μm(band 4),while the blueschist/greenschist show high reflectance in the 221 μm(band 6),and it exit low reflectance in 165 μm(band 4),and blueschist/greenschist appear low ASTER band4/band6 ratio.

白云巖的CO2-3吸收譜帶中心波長位于232〖KG*3〗μm超碰国产人人操，與灰?guī)r的CO2-3 吸收譜帶中心波長位置235 μm相比欧美AAAAAA黄片，具有向短波長方向移動的特點，據(jù)此可以利用RBD7日本精品久久、RBD8分別有效的識別白云巖和灰?guī)r一级毛片高清免费视频；長英質(zhì)巖石顯示AlOH和Fe3+ VNIRSWIR吸收特征，而基性超基性巖石顯示Fe2+和Fe国产免费AA视频、MgOH特征欧美色图亚洲色图在线，利用不同的鐵價態(tài)和次要礦物可以區(qū)分它們：ASTER band2/band1代表了含F(xiàn)e3+礦物分布信息、ASTER band5/band4代表了含F(xiàn)e2+礦物分布信息乱伦色一区二区、RBD6可以估計AlOH礦物的豐度香港经典a毛片久久免费观看2；砂質(zhì)/泥質(zhì)片巖含較多的多硅白云母、綠泥石98超碰人人与人人欧美、黑硬綠泥石以及風化后表面覆蓋的其它粘土礦物先锋久久中文，在221 μm（band 6）存在有特征的吸收譜帶，并且在165 μm（band 4）具有較高的反射率偷自拍另类亚洲清纯唯美，而藍片/綠片巖在221 μm（band 6）反射率較高爱爱视频在哪里考，不具有明顯特征吸收譜帶，同時其在165 μm（band 4）反射率較低久久性生活视频免费，因此藍片/綠片巖ASTER band4/band6 比值低黑人一级婬片A片免费无码。

With the support of a major research grant of Zhejiang Province (No. 001101027) and the Plan of Promoting Education of Excellence of Zhejiang University in the 21st Century, this dissertation is devoted to address the above problems and fabricate an L-band EDFA with low cost, high performance and technological innovation.First the mechanism of an erbium doped fiber amplifier is introduced. Various theoretical models based on classical rate propagation equations are summarized and compared for their applications. We use a modified numerical model based on the Giles model, which agrees with the experimental results well. This serves as the theoretical base for the whole thesis and will be used to optimize the characteristics of EDFAs. A novel method based on a map of noise figure and gain is proposed to analyze efficiently the dependence of the noise figure and gain for EDFAs on the EDF length and the pump power. The characteristics of various EDFAs are studied and compared.Secondly, some important parameters are introduced to describe the characteristics of EDFAs. The methods and the experimental setups for measuring the gain and noise figure of an EDFA are emphasized. We introduce how to measure the characteristics of each component of an EDFA, especially the gain and absorption coefficient of an erbium doped fiber.Thirdly, four types of simple and novel L-band EDFA structures with low noise, high gain and low gain ripple are proposed to satisfy the requirement of a DWDM system. They can be classified into two categories. In the first category, a single ASE pumping is served asa secondary pump. This category includes the following three types. Type: a new construction using a fiber Bragg grating in an unpumped EDF section at the input side. Type: a new structure of L-Band EDFA with two-stage pumps, which utilizes the forward ASE as a second pump.

本論文本著科技創(chuàng)新、服務(wù)于生產(chǎn)實踐的精神秋霞人成午夜免费大片麻豆，以設(shè)計價格低廉欧美日韩国产无线码一区，性能優(yōu)越、結(jié)構(gòu)合理簡單的L-band EDFA為目標国模视频，依托浙江省科技廳重大科學基金資助項目(001101027)和浙江大學振興教育計劃資助的全光網(wǎng)絡(luò)的搭建—《光通信技術(shù)》課程實驗建設(shè)項目性无码专区一级，展開了如下工作：首先，介紹了摻鉺光纖放大器的工作原理国产免费性生活视频，歸納總結(jié)了基于速率方程基礎(chǔ)的EDFA的各種理論模型又色又爽又黄的黄网站18禁，分析比較了各個模型的特點和適用場合，最終選擇完善的Giles理論模型作為本論文分析設(shè)計EDFA的理論基礎(chǔ)欧美日韩操；針對實際實驗條件提出了修正的EDFA模型的數(shù)值計算方法欧美日韩国产啊啊啊；創(chuàng)新地提出了增益—噪聲系數(shù)全局分析法在线黄色网站大全，直觀有效地分析了EDFA的增益和噪聲系數(shù)與摻鉺光纖長度和泵浦功率的依賴關(guān)系，并對各種EDFA的性能作了全面的比較91在线精彩；第二日韩黄片AV，介紹了摻鉺光纖放大器特性參數(shù)的定義與測量方法，重點介紹了噪聲系數(shù)和增益系數(shù)的測量方法及實驗裝置亚洲最新的黄色网站；介紹了組成摻鉺光纖放大器各組件的特性測量方法97一级毛片全部免费播放，重點介紹了測量摻鉺光纖參數(shù)的方法和實驗裝置；第三人人干人人操国产，針對WDM系統(tǒng)對L-band EDFA譜平坦99久久九九国产精品、低噪聲、高增益的要求日韩A片一级无码专区网址，我們創(chuàng)新地提出了四種不同的L-band EDFA結(jié)構(gòu)饥渴熟妇高潮喷水，按設(shè)計思路可以分為兩大類：一類是基于單抽運二級泵浦法，這一類包括在未泵浦摻鉺光纖的輸入端插入一根布拉格光纖光柵的兩段L-band的EDFA的新結(jié)構(gòu)又大又硬又粗视频网站免费观看；基于前向ASE光作為二級泵浦源推動下一級EDF工作的泵浦分配美女污疼视频网站、兩段級聯(lián)L-band的EDFA的新結(jié)構(gòu)；基于單根光纖光柵欧美性免费、泵浦分配黄色在线网站视频、兩段級聯(lián)的EDFA；另一類則是基于同時應(yīng)用前后向C-band ASE作二級泵浦源的雙抽運法wwwwxxxx在线观看免费黄色视频，如基于前后向ASE光作為二級泵浦源的三段級聯(lián)L-band的EDFA的新結(jié)構(gòu)手机看片1024精品国产。

NMR absorption line：核磁共振吸收線

NMR absorption band,核磁共振吸收帶 | NMR absorption line,核磁共振吸收線 | NMR equipment,核磁共振儀

absorption cell：吸收盒

"吸收[譜]帶","absorption band" | "吸收盒","absorption cell " | "吸收系數(shù)","absorption coefficient"

absorption bands：吸收頻帶

氫感應(yīng)吸收帶 absorption band,hydrogen induced | 吸收頻帶 absorption bands | 光導體吸收系數(shù) absorption coefficient,photoconductors