reflection n. 1.【物,計】反射;反射波[光,熱,音,色]。 2.反映;反影,映像,(映在水等中的)影像;〔比喻〕學(xué)人樣的人,極像…的人,逼肖的形象[言語、動作、思想]。 3.反省,熟慮,沉思,回顧;〔pl.〕感想,意見;【心理學(xué)】(神經(jīng)等的)反射作用。 4.非難,譴責(zé);丟臉,恥辱 (on, upon)。 5.折轉(zhuǎn);彈回;【解剖學(xué)】翻轉(zhuǎn)(處),折轉(zhuǎn)(處)。 theory of reflection 反映論。 an angle of reflection 反射角。 He is simply a reflection of his father.他完全是他父親的復(fù)本。 I have a few reflections to offer on what you have said. 我對你的發(fā)言提供幾點意見。 be lost in reflection 沉思。 cast a reflection on 譴責(zé)…,成為…的恥辱。 on [upon] reflection 仔細想,反?。粚Α焕?,使…名譽受影響,使…蒙受恥辱;中傷,影射(On reflection, I doubt whether I was right. 細細想起來我倒懷疑我講的是否正確了)。 without (due) reflection 不經(jīng)思考,輕率。 adj. -al
at a loss 不知所措,困惑;虧本地; 不知怎辦; 虧本的,茫然不知所措的; 困惑, 虧本地; 困惑,不知所措; 困惑,不追所措,虧本地; 困惑;茫然不知所措; 困惑不解,茫然不知所措; 茫然不知所措
loss n. 1.喪失;丟失,遺失。 2.減損,損失,虧損(額);損耗;減少,下降。 3.失??;輸?shù)簟?4.錯過;浪費。 5.損毀;【軍事】傷亡;〔pl.〕 傷亡及被俘人數(shù)。 loss of sight 失明。 copper loss【電學(xué)】銅耗。 core [iron] loss【電學(xué)】鐵耗。 a dead loss凈虧,純損。 an idling loss空轉(zhuǎn)損耗。 a total loss總損失。 His death is a great loss to the country. 他的死是國家的大損失。 profit and loss盈虧。 suffer heavy losses 遭受重大損失。 loss of pressure 壓力下降。 loss in weight 重量[體重]減少。 loss of weight 失重。 the loss of a war 戰(zhàn)敗。 loss of opportunity 錯過機會。 at a loss 1. 無辦法,為難 (I am at a loss what to do. 我就是不知道怎樣辦才好)。 2. (獵犬)失去獵物嗅跡。 3. 虧本地 (sell sth. at a loss賠本賣出某物)。 cut a [the] loss 趕緊脫手以免多受損失。 for a loss 處于苦惱中 (throw them for a loss 使他們苦惱)。 make a loss 虧損。 without (any) loss of time 即刻,馬上。
The filters should be cemented together, thus minimizing the surface reflection losses . 為了盡量減少表面的反射損失,應(yīng)該把這些濾色鏡膠合在一起。
They have high reflection losses and isolates degree , lower insertion loss 具有高的反射損耗和隔離度,較低的插入損耗。
In the situation that the reflection loss of the duct inwall was not in considering , even condensed the pump beam 100 times , it could realize the output efficiency of more than 70 % , this was that the other coupling way hardly to accomplish 在不考慮內(nèi)壁反射損耗的情況下,即使將泵浦光束縮束100倍,也能夠?qū)崿F(xiàn)70 %以上的輸出效率,這是現(xiàn)有其他耦合方式難以實現(xiàn)的。
The lichtenecher formula is used to culculate the electromagnetic parameters of radar absorbing coatings which are respectively made up of some adhesive and various radar - absorbing ingredients , the reflection loss formula ( rlf ) applicable to the homogeneous radar absorbing coatings is deduced according to the electromagnetic theory . accdingly , a radar - absorbing model which is proved reasonable is set up applicable to radar absorbing coatings . on the base , the prediction to performance , the electromagnetic analysis and the optimized designs of rams of various thickness , various absorbers and volume percentages are performed by programmed using basic and c + + 本文利用lichtenecker性能加和公式對涂層的等效電磁參數(shù)進行了模擬計算和分析,并根據(jù)電磁理論詳細推導(dǎo)了涂層的反射損耗與其等效電磁參數(shù)之間的關(guān)系,建立了由膠粘劑和不同種類、不同體積分數(shù)的吸收劑組成的多層吸波涂層的吸波模型,并通過實驗驗證了該吸波模型的合理性。
The numerical simulation equations of the border curves in term of and as well as the matching rules and the frequency dependence of microwave electromagnetic parameters of a broad - band homogeneous absorbing coating with a finite value of reflection loss are available . these results pointed out the direction to develop rams " . according to the radar - absorbing model , the optimized design of rams with thin - layer , light - weight , broadband and strong - absorbing is available by the simple genetic algorithms , which can effectively conduct the research work of rams to the detail . small but completely , the electromagnetic parameter ' s databases of rams that based on actual microwave absorbers have been set up , the object function has been constructed which conform to the involved goals , the adaptive coding measure is taken which extends the coding length dynamically adapting to the condition of the number of actual absorbers or the precision of thickness and absorber - volume - percentage , the decoding technique is initiated which satisfies light - weight and strong - absorbing as well as thin - layer and broadband by adopting of tracing variable restricting conditions dynamically to control total thickness . when decoding , the variable restricting conditions of thickness are dynamically traced , so gain the radar absorbing coatings of light - weight multiple - layer single - ingredient . similary , of thickness and absorber - volume - percentage , of light - weight multiple - layer multiple - ingredient . also , the rams ' demand to radar - absorb performance as frequency is met making use of the penalty function 作為遺傳算法的具體實施:根據(jù)本實驗室近來研制的吸波材料,建立了吸波材料的相關(guān)數(shù)據(jù)庫;構(gòu)造了能真實體現(xiàn)“薄、輕、寬、強”優(yōu)化目標的目標函數(shù);根據(jù)材料的實際數(shù)量以及涂層厚度精度要求、吸收劑體積分數(shù)精度要求,建立了能動態(tài)擴展相應(yīng)碼長的自適應(yīng)編碼方法;首創(chuàng)了通過動態(tài)跟蹤變量的約束條件來控制涂層總厚度的解碼技術(shù),以此實現(xiàn)了在不弱化寬頻、高強的吸波性能目標的同時,兼顧到薄層、輕質(zhì)的使用性能要求;在解碼時通過動態(tài)跟蹤厚度變量的約束條件,實現(xiàn)了多層單組分吸波涂層對重量輕的要求;通過動態(tài)跟蹤厚度變量的約束條件和吸收劑體積分數(shù)的約束條件,實現(xiàn)了多層多組分吸波涂層對重量輕的要求;使用權(quán)重系數(shù)變化法,實現(xiàn)了吸波涂層的分頻段吸波性能要求。