選擇衰減 的英文怎麼說

中文拼音 [xuǎnzháishuāijiǎn]
選擇衰減 英文
selective fading
  • 選 : Ⅰ動詞1. （挑選） select; choose; pick 2. （選舉） elect Ⅱ名詞（挑選出來編在一起的作品） selections; anthology
  • 擇 : 擇動詞（挑選） select; pick; choose
  • 衰 : 衰動詞（衰弱） decline; wane
  • 選擇 : select; choose; opt; election; choice; culling; alternative
  • 衰減 : attenuation; decay; damping; reduction; rejection; weakening; deamplification; dampening; dying o...
  1. The results show that : nano - nickel powder is not useful for mh electrode during the high rate discharge phase as a conductor or additive ; superfine nickel powder is applicable for the conductor of the negative because of the good performance especially the cyclic stability at 1c rate by using 5 % ( mass percentage ) nickel powder ; the utilization of alloy, specific mass and volume capacity are increased with the decreased particle size of nickel powder in negative, however, the capacity fading rate at 1c discharge rate is also increased, so the capacity and the cyclic stability should be taken into account to make a choice of the particle size

    結果表明： mh電極中加入納米鎳粉對負極的大電流放電性能不利。 mh電極中加入超細鎳粉后電極綜合性能好，尤其是1c循環穩定性，其最佳添加量為5wt 。減小鎳粉粒度提高了電極合金利用率、質量比容量、體積比容量，但增大了負極1c容量衰減率，因此鎳粉粒度的選擇應綜合考慮mh電極容量和循環穩定性。
  2. And the most advantage of ofdm is that it can convert high - rate data stream into the low - rate and reduce data bandwidth so that multi - path - fading can be transformed into flat fading in wireless circumstance

    這種調制技術的最大的好處就是將高速的數據流，變換成并行的低速數據流，減小了數據帶寬，從而可將無線環境中的多徑衰落（頻率選擇性率落）轉換成平坦衰落。
  3. In general, the thesis covers the following aspects : first, in accordance with the property of variable tuning optical attenuator ( voa ), which is analyzed and discovered through diffraction theory, selected block plate and made attenuator, and achieved satisfactory effect by experiment in light transportation circuit

    針對可調型機械擋光衰減器的擋光特點，從衍射理論的角度分析和發現該器件的衰減特徵，並根據該特徵選擇擋光片，製作了衰減器。在傳輸光路上試用，獲得了較好的效果。
  4. In the terms of interpolation, the image reconstructed from nearest interpolation or linear interpolation has good edge but serious noise ; reconstruction from 4 * 4cubic interpolation or three b - spline or three - order lagrange interpolations has better local character. 2 x 2cubic interpolations which has both better edge and local character is the ideal interpolation, the following is the basic principle during reconstruction : ( 1 ) the more width of interpolation, the more number of summation and the more order of interpolation polynomial, the higher of density resolution ; ( 2 ) the more of interpolation polynomial and width of interpolation, the more of reconstruction time simultaneously, aimed at eliminating the effects of noise contained in projection data, in this paper, author analysis cause and effects of common artifacts. importantly, discusses convolution back - projection reconstruction algorithm with a shift axis of rotation has been derived for correcting images that acquired with a divergence axis of rotation using the fan beam geometry with an angle - equaled detector

    在ct圖像重建時，選擇有限帶寬窗有較好的空間解析度，三角形窗有較好的密度解析度，選擇餘弦窗則使得空間解析度與密度解析度的折衷；從窗函數的頻譜角度來講，可以用於圖像重建的一個良好的卷積窗函數應該具備以下條件： （ ? ）小的3db帶寬b ，即最小的主瓣寬度； （ ? ）最小的旁瓣最大峰值a ； （ ? ）最大的旁瓣峰值衰減速度d ；就內插函數而言，臨近點內插與線性內插重建圖像噪聲大，但有較好的邊緣與細節； 4 4三次內插、三次b -樣條與四次拉格朗日多項式內插圖像平滑，局部特性較好。
  5. This can be a complex process that includes choosing appropriate signal conditioners, isolation circuitry, filtering, scaling, formatting, etc

    這可能是一個復雜的過程，包括選擇合適的信號調理裝置、隔離電路、濾波、衰減、格式化，等等。
  6. Characteristics of attenuating and absorbing of super wideband radar surface wave by means of radar absorbing coatings as well as radar absorbing coatings combined with frequency selective surfaces are studied and then reported here

    研究了雷達吸波塗層對寬頻段雷達表面波衰減吸收的規律以及頻率選擇表面與吸波塗層相結合的復合吸波塗層對寬頻段表面波衰減吸收的規律。
  7. We have demonstrated a novel voa based on high birefringence fiber loop mirror, which has many advantageous characteristics such as a simple structure, high flexibility, polarization independence, low insertion loss and low price, etc. experimental proof shows that it is convenient to realize the control of optical power by using this voa

    2 .利用雙折射光纖環鏡設計並製作了一個結構簡單的可調諧光纖衰減器，具有靈敏度高，偏振無關，低插入損耗和低成本等特性。實驗證明它可以很方便的控制光功率。 3 .提出了一種由布拉格光纖光柵和高雙折射光纖環鏡共同構成波長選擇器件的摻鉺光纖激光器。
  8. In order to avoid light degradation, low interstitial oxygen content and low boron concentration b - doped p - type cz - si material should be used, for example, the resistivity can be from 5 - 10. cm, the efficiency has reached to 22. 0 %

    上述研究工作表明：為了避免光衰減，提高矽片少子壽命，應該選擇低氧濃度的矽片，並降低硼的摻雜濃度，即：使用高阻材料製作太陽電池。
  9. This paper relates to some problems about the determination of design ground motion parameters, which include the choice of the attenuation relationship of rock horizontal acceleration response spectrum, the impact of focal depth to rock peak horizontal acceleration and rock response spectrum curves, the choice of intensity envelops function and random input phase, the choice of soil nonlinearity and shear wave velocity, scale of design ground motion response spectrum etc. in the researches of relative aspect, based on a typical section plane of the engineering site, influence of the change of some parameters on design ground motion parameters and the existing errors and corresponding rules are studied by using the method of one dimension model of equivalent linearization

    摘要研究了確定設計地震動參數中涉及的若干問題，其中包括基巖水平加速度反應譜衰減關系的選擇、震源深度對基巖水平加速度峰值及基巖反應譜曲線的影響、強度包絡線函數及輸入隨機相位的選擇、土體非線性特性參數和土層剪切波速值的選擇、設計地震動反應譜的標定等問題。
  10. It including the choice of factors and decision of weight value, the calculation of factors of land grading, the choice of calculation models and declining models

    具體介紹了各種定級因素的選擇及權重的確定，因素作用分的計算，定級因素因子計算模型和衰減模型的選擇。
  11. The results show that thinner radar absorbing coatings can strongly attenuate high frequency surface waves, while alternate using of thin radar absorbing coatings and thin radar absorbing coatings compounded by frequency selective surfaces can strongly attenuate wideband surface wave and it is possible that high performance balanced stealth of super wideband can be reached using the alternate radar absorbing coatings

    實驗結果表明，低厚度的雷達吸波塗層就可以實現高頻表面波的強衰減吸收，而頻率選擇表面與低厚度雷達吸波塗層相結合的復合塗層與雷達吸波塗層共同交替使用可以實現寬頻段表面波的強衰減吸收，有望實現目標物體在寬頻段范圍內的高性能均衡雷達隱身。
  12. All records are classified into three site conditions. for the two components of a record, two energy equivalent spectra are calculated, and the geometric mean of the two spectra are adopted to analysis by two - stage regression method using an attenuation model. then the attenuation law is attained

    對每一條記錄，取了兩個分量所計算的能量譜的幾何平均值，選擇了衰減模型，利用兩步回歸法，對這些能量等效速度譜做了統計擬合分析，得出了地震動四種能量反應譜隨震級、距離等參數的衰減規律。
  13. According to studying these influences, which are cauced by economic developing level, changes of life style and the regularities of distance deceding in tourist demand, distribution of time and psychology of choosing destination, this article analyses the fundamental conditions for developing lushan tourist and the temporary situation in tourist market, then discusses methods for further development

    本文通過研究經濟發展水平、生活方式變動等因素對旅遊消費的影響，旅遊需求的距離衰減規律、時間分佈規律和目的地選擇心理規律等的基礎上，分析了廬山旅遊開發的基礎條件、旅遊市場目前的狀況，探討廬山旅遊市場進一步開發的途徑。
  14. The west of usa where there are not only plenty of strong ground motion records but also attenuation relationship of intensities is selected as the reference region and the attenuation relationship of ground motion in china are transformed from corresponding attenuation relationship of intensities

    選擇既有豐富的強震記錄又有烈度衰減關系的美國西部地區作為參?區，並利用本文確定的分區地震烈度衰減關系轉換得到相應的地震動衰減關系式。
  15. The financial secretary has, in fact, heeded recent public opinions and maintained a higher expenditure growth of 3. 5 percent. this reflects the fact that at a time of economic recession, the immediate demand for social services may increase rather than decrease. but instead, it will add pressure to a more drastic reduction in expenditures during the next two years in order to broadly balance the budget

    去年預算案中的預測數字顯示，公共開支的增長在今年將大幅回落至1 . 2 % ，但結果財政司順應民意，現時選擇了仍將開支訂定於3 . 5 %增長，除了反映經濟衰退時，社會服務需求可能不減反增的現象外，亦在未來兩年的中期內，有更大延遲壓力，去調低開支，求取預算的大致平衡。
  16. In the optical fiber transmitting system, attenuation of fiber affects transmitting efficiency directly, the lower attenuation is very important because it affects the sensitivity frequently. the choice of join form and fixation method is also important for it will make large wastage. so we must pay attention to the join and fixation form when designing sensors

    從分析中得出，在光纖傳輸系統中，光纖的衰減直接影響光纖的傳輸效率，低衰減特性非常重要，因為它常常會影響測量靈敏度；光纖與光探測器之間的連接形式和固定方法如果選擇不好也會造成較大損耗，為此在設計傳感器的同時，特別注意了與光纖的連接和固定方式。
  17. The third chapter in the paper presents a method that we can select suitable ultrasonic frequence in the analysis of the ultrasonic attenuation

    在論文第四章對超聲波在液壓缸中衰減的分析中提出了選擇合適超聲頻率的一種方法。
  18. On the ground of mpda algorithm and the conclusion of its steady - state performance evaluation, the choice of the detection threshold becomes a matter of optimization under the condition of properly chosen detection model and hypothesis. and the analytic expression of auto - adjusted detection threshold can be deduced via approximate fitting attenuation factor derived from the conclusion of performance estimation. it presents a novel approach for the optimization of detection - tracking system

    基於mpda演算法及其穩態性能估計的結論，在適當選擇檢測模型和一定假設條件下，將自適應檢測門限的選擇歸結為一個最優化問題，通過近似擬合性能估計結論中的衰減因子，得到了最佳檢測門限自適應調整的解析表達式，為檢測?跟蹤系統的聯合優化設計提供了一種新思路。
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