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fra n.〔意大利語〕 兄弟〔用在教士姓名前,作稱呼用〕。

fracas

At last , in term of the property of wide band of fra , the interference between channels of multi - channel amplification system is discussed . in multi - channel system , the relations between signal - interference ratio and input signal wave power , between signal - interference ratio and the number of channel and between signal - interference ratio and gain of fra have be discussed . the way of restraining the interference is produced 最后結合喇曼放大器寬帶寬的特性討論了在多信道系統中光纖喇曼放大器的串擾問題,研究了在多信道系統情況下,系統中的信擾比與信號輸入光功率、信道數以及放大器增益之間的關系,并提出了減小此串擾的方法。

The recent research and development situations of the optical fiber amplifier including erbium doped fiber amplifier ( edfa ) , thulium doped fiber amplifier ( tdfa ) , raman fiber amplifier ( fra ) and semiconductor optical amplifier ( soa ) domestic and abroad are described , and the trend of the amplifiers are discussed , the characteristics of them are compared 摘要介紹了國內外光放大器的最新研究動態,主要包括摻鉺光纖放大器、摻銩光纖放大器、光纖喇曼放大器及半導體光放大器,并指出相關放大器的發展趨勢,最后對光纖放大器的特性進行了比較分析。

To accelerate the development of next generation high dwdm system , the pape r also researches the property of gain . based on optical wave nonlinear transmission equation , the gain model of fra is established . by the way of numerical analysis , it is obtained that the gain of fra has relation with pump power , input signal wave power , the effective area and absorption of fiber . the obtained conclusion has definite instruction to the design of fra 為了促進下一代超高速dwdm密集波分復用技術的發展,本文還研究了光纖喇曼放大器的增益特性,根據光波非線性傳輸方程建立光纖喇曼放大器增益模型,通過數值模擬分析了泵浦波功率、信號輸入光功率、以及光纖有效面積和損耗對光纖喇曼放大器增益的影響,得出了一些對光纖喇曼放大器的設計有一定的指導意義的結論。

In or der to im prove the index precision , the keywords of classification on im age database is used for for m ing a three - level sem a ntics network , and then a unified fra m ework for sem a ntics and feature based relevance feedback in region - based im age retrieval is described , which is experim e nted by irrelatively adjusting the keywords and the weights in the distance m easuring 根據檢索要求,應用圖像庫的分類關鍵字建立圖像語義網絡,采用一種綜合圖像中多數區域特征的匹配策略,以及建立區域語義和低層特征無縫結合的相關反饋檢索框架,通過不斷調整檢索關鍵字、檢索向量與距離測度中的權重系數的方法提高檢索準確度。

Finally , for the multi - wavelength backward pumping fra problems , which are very hard to cope with , we proposed multi - dimension parallel shooting method . the simulation results demonstrate that this method is very useful in solving the raman coupled equations , which are representative of the highly nonlinear problems . the shooting can be converged in short time ( the shooting deviation can be less than 10 - 8 after 6 shooting when there are 8 pumping wavelengths ) 最后,對于最難求解的多波長后向泵浦fra問題,本文提出了多維并行打靶思想, matlab下數值仿真證明,該多維并行打靶法非常適合求解拉曼耦合方程這類高度非線性的問題,打靶過程收斂速度較快(八波長泵浦時只需打靶6次就可以使打靶偏差小于10 - 8 ) 。

The flame - retardant and mechanical properties of the frp specimens with different fra ratio were investigated . it is shown that the oxygen index of the resin with the ratio of 15wt % of the fra reachs 28 . the specimens are quenchable without any outer forces , however , the bending strength of the specimens decreases significantly 研究了不同阻燃劑含量frp的阻燃性能和力學性能,結果表明,阻燃劑加入量為15wt %時, frp氧指數達到了28以上,使該材料達到自熄級水平,但其彎曲強度下降較大。

Business scorecard manager 2005 update rollup 4 is a cumulative patch . it is available for all the released languages : chs , cht , enu , esn , dan , deu , fra , ita , jpn , kor , pol , and swe Business scorecard manager 2005更新匯總套件4為積存性套件,具備所有發行語言的版本:簡體中文繁體中文英文西班牙文丹麥文德文法文義大利文日文韓文波蘭文與瑞典文。

Flame resistance agents ( fra ) , namely , lfr - up , ath and ato , were added into the rtm resin to obtain uniform resin system with ideal flame - retardant property by optimized process 通過向rtm專用樹脂中添加磷酸酯(含氯) 、氫氧化鋁、氧化銻三種阻燃劑,采用優化的處理工藝,得到阻燃劑分散均勻、阻燃效果好的rtm專用樹脂體系。

Secondly , novel genetic algorithm is developed to optimize the wavelength and power value of the pumping sources in the mutli - wavelength backward pumping fra to get the best gain flatness 第二設計新型的遺傳算法,結合前面提到的多維并行打靶法來優化多波長后向泵浦fra各個泵浦光的波長、功率值,以得到更好的增益平坦度。

We outlined the history of optic amplifiers , analysed the advantages and disadvantages of edfa and fra , and the application area of rare earth doped tellurite glass amplification fiber 摘要文章介紹了光纖放大的研究歷史,分析了摻鉺光纖放大器( edfa )和光纖拉曼放大器的優勢和劣勢,指明了稀土摻雜碲酸鹽放大光纖的應用領城。

The eastern court ordered to estreat 250 , 000 cash surety from a senior executive of a subsidiary of guangnan holdings limited who was wanted by the icac in relation to alleged letters of credit fra 東區法院頒令充公一名廣南集團有限公司廣南附屬公司的高層人員二十五萬元人事擔保。

Forward rate agreement / fra a forward contract specifying an interest rate that will be paid on a future date . similar to futures , but more flexible in terms of dates 遠期利率協議/ fra詳細說明在未來某一日期將會支付一定利率的一份期貨合同。與期貨相似,但在日期上更靈活。

The equations describing the single wavelength and multi - wavelength forward pumping fra are solved through numerical methods by dividing fiber into many small sections 本文通過基于光纖分段思想的數值求解方法,解決了單波長、多波長前向泵浦fra耦合方程組的數值求解問題。

The addition amount of 0 . 01 % ~ 0 . 035 % can reduce the rough spicy taste , cover the intermixed taste , purify the liquor quality , balance and regulate the fra grance 添加量在0 . 01 % ~ 0 . 035 %就可降低酒體的糙辣味,緩沖和掩蓋雜味,可使其酒質綿甜爽凈,香味協調及平衡作用。

France , located in western europe , is one of the most beautiful and romantic country in the world . please join us to discover the wonderful fra . . 其中原因當然少不了是為了聞名遐爾的巴黎艾菲爾鐵塔蔚藍海岸cote d azur的沙灘冒著汽泡的香檳酒香脆的法

It is available for all the released languages : chs , enu , esp , deu , fra , and jpn 可適用于所有已發布的語言版本:簡體中文、英語、西班牙語、德語、法語和日語。

Forward rate agreement fra 遠期利率協定

Kb klip fra denne film 從這個電影中購買片段

Frame relay access device fra 訊框傳輸存取設備