high attenuation 中文意思是什麼

high attenuation 解釋
高衰減量
  • high : adj 1 高的〈指物，形容人的身高用 tall〉；高處的；高地的。2 高級的，高等的，高位的，重要的。3 高尚...
  • attenuation : n. 1. 變薄，變細。2. 減少，減弱。3. 稀釋。4. 【物理學】衰減。
  1. Two kinds of filters are presented : by transferring the conventional waveguide cavity filter to the siw, a narrow bandstop filter is designed and simulated, get characteristic of narrow - band bandstop filtering. for example, relative bandwidth 1. 2 %, most attenuation of 48db in band. electromagnetic bandgap ( ebg ) structures present “ forbidden band ” characteristics, siw features high - pass characteristics, so bandpass filters can be composed by combing ebg and siw

    本論文提出了兩種基片集成波導濾波器結構:將傳統的腔體濾波器概念運用於基片集成波導結構，設計出了一種窄帶帶阻濾波器，對其進行模擬，得到了窄帶帶阻濾波特性，如相對帶寬為1 . 2 % ，最大衰減為48db 。
  2. As for a space - based cloud radar, the change of the radar reflectivity n and the change of attenuation rate along with the cloud liquid water content have been compared between 37 ghz and 94ghz. the transmittance t of single level cloud for different heights and liquid water content has also been calculated at 2 frequencies. by defining a = n tr, which combines both effects of radar reflectivity and transmittance, we have examined the values of a at 37ghz and 94ghz for high, middle and low cloud liquid water contents

    對空間測雲雷達，討論了37ghz和94ghz這兩個頻率的雷達反射率和衰減系數隨雲液水含量的變化；計算了不同高度的單層雲在不同頻率，不同含水量情況下的雲層透過率_ ；定義a = _來綜合考慮雷達反射率和透過率對空間測雲雷達回波的影響，分析比較了雲含水量高、中、低時37ghz和94ghz的a值大小。
  3. Attenuation mechanism and application study of high impulse electromagnatic wave propogation of gpr

    探地雷達高頻電磁波傳播衰減機理與應用實例
  4. Proved with the mixing rate using parameters tw and r ^ it showed that large amplitude and high frequency could greatly enhance the mixing rate. but at large st, the rate of attenuation appears to be in periodic fluctuation at the range of low frequency, so there must be some best partnership of amplitude and frequency

    用參數t _ w 、 r _ （ 15 ）表徵的混合效率表明：總的來說大振幅、高頻率有利於混合，但在st較大的低頻率區中衰減速度會有周期波動的特性，存在最佳的頻率振幅配對。
  5. It point out the resolving methods of the high frequency communication characteristic and its attenuation of the distribution network are the new research field

    指出電網的高頻通信特性及其抗干擾、抗衰耗對策是獨立於高性能載波晶元的研究領域。
  6. The analytic specific attenuation model for rain for use in prediction methods are developed, the specific rain attenuations calculated by the analytic model are in high agreement with those by the parameters tabulated in itu - r model, this model has presented to itu - r as a proposed revision to current itu - r model

    基於itu - r特徵雨衰減模式的列表參數，提出了特徵雨衰減的解析模式，該模式計算的特徵雨衰減與itu - r模式列表參數計算結果間有很好的一致性，並提交itu - r作為國際標準審議。
  7. Against the background of the continuing spread of digital tv broadcasting, tachii electric wire has developed the tcx - hfbl series and tcx - fws series of high - frequency coaxial cable products. both of these series are compatible with the us smpte standard 292mhdtv and the japanese arib standard btas - 004b and are products that exhibit excellent attenuation characteristics by controlling return losses at a low level

    普及數字高清晰度電視播放的同時開發了適合美國的smpte規格292mhdtv ，日本的arib規格btas - 004b的高頻同軸電纜： tcx - hfbl系列， tcx - fws系列，有效抑制損耗，改善衰減特性的產品。
  8. Generally speaking, the high group velocity and low attenuation factor and high qr in the same area, but relatively low group velocity and high attenuation factor and low qr in the same area in china is the general distribution

    在不同周期，面波衰減系數或品質因子在整個中國大陸區域分佈是不均勻的；總體表現為高群速度分佈的區域呈現高叢和低衰減系數、低群速度分佈的區域呈現低叢和高衰減系數分佈的特點。
  9. Ct usually demonstrates a high attenuation region surrounded by a halo of abnormally low attenuation, consistent with acute hemorrhage and secondary edema, respectively

    Ct上經常顯示一個高信號衰減區外周圍繞一圈低信號衰減光暈，這種影像與相應的出血和繼發性水腫是相一致的。
  10. High attenuation to low frequency, excellent perform ance of common mode and differential mode interfere nce suppression

    極佳的低頻段衰減特性，具有良好的共模和差模干擾抑制性能。
  11. According to structural characteristics of multi - phased alloy steels and the properties of ultrasonic propagation, microstructures characterization with different heat treatment processes ( normalizing, quenching / annealing, quenching plus low tempering, quenching plus high tempering ) for three steels ( 40cr, 38crmoal, gcrlssimn ) was studied experimentally by using ultrasonic methods. ultrasonic velocity, relative attenuation coefficient, and power spectral analyses were researched on the same samples respectively, on the basis of theory and experiment, the sensitivity and other characterizations of the three methods used to distinguish different microstructures were compared

    根據具有多種相結構合金鋼不同熱處理轉變產物的組織特點，以及超聲波在其中的傳播規律，利用超聲波速度、相對衰減系數以及功率譜分析三種方法，對三種鋼（ 40cr 、 38crmoal及gcr15simn ）不同熱處理（正火、淬火退火、淬火+低溫回火及淬火+高溫回火）轉變產物的顯微組織進行了超聲表徵研究。
  12. Space optical communication has much advantage such as much greater communi - cations capacity, high - bit - rate, high secrecy, high anti - electromagnetic disturbance, small size and low attenuation. it is a lively branch of communication. so each country attaches important attention to space optical communication, and achieves great progress

    空間激光通信具有大通信容量、高傳輸速率、保密性好、高抗電磁干擾能力、終端設備體積小、功耗低等優點，是通信領域內一個富有生命力的分支，因此各個國家都非常重視對空間激光通信的研究工作，並取得了可喜的進展。
  13. ( c ) land natural productivity increase from 7843 kg / ( hm2 - a ) to 17335 kg / ( hm2 - a ) relate to altitude closely, and the mean rate of enhancing yield is 23. 53 percent in this region with annual enhancing - rate of 0. 64 percent in last 15 years. ( d ) there are many facters that have been influe ncing soil effective coefficient that ' s soil organic matter, total nitrogen, effective phosphine and soil texture in turn. in a word, attenuation cause of land productivity is the result of water and soil. ( e ) the forestland potential productivity change from 3986 kg / hm2 to 15034 kg / hm2, but it has a high distinction between southern aera and north area in yaan city. ( f ) the grassland potential productivity increase from 4085 kg / ( hm2 - a ) to 16973 kg / ( hm2 - a ), but it has a high classification of potential productivity, ( g ) ditribution map was formed of potential land productivity. ( h ) it could be act as decision support for agriculture development, national land planning and ecotop constructive, etc

    5 、土地自然生產潛力水平的主要土壤限制因素為有機質、全氮，其次為速效磷和土壤質地；區域潛在生產力差異的制約因素，主要為土壤，次為水分，水、土兩項衰減合計為45 . 99 ，石棉、漢源兩縣水、土衰減達到60左右。 6 、林地潛力在3986 15034kg / hm ~ 2之間，高等級林地比重小，以大相嶺為界，北部的各縣林地生產力水平高，南部的兩縣林地生產力水平較低。 7 、天然草地生產潛力水平高，潛力在16973 4085kg / （ hm ~ 2 ? a ）之間，以高產的一、二、三級草地為主，且近10年來該比例變化不大。
  14. The key points of this paper can be concluding as follows : 1. the regulations of vibration attenuation of a subway are concluded by analyzing the situ data. in the zone near rail, the high - frequency vibration is stronger than other weight, and in the zone far away from railway, the results is opposite

    主要研究內容和結果如下: 1 .對某地鐵線路環境振動實測數據進行了分析，得到了振動波在土中的傳播規律:地鐵運營誘發振動傳播過程中，近軌區域以高頻振動為主，遠軌區域以低頻振動為主。
  15. Ct method uses array linear detectors to perform high - resolution tomography and yield relative image of linear attenuation coefficient

    測出的線衰減系數是相對的，成像要求高分辨。 tgs裝置用的是同軸大體積hpge探測器。
  16. Rolling bearing ’ s vibration signal has a strong background yawp, the different fault cause the different characteristic of vibration. particularly the scathing fault, will not only cause the low frequency impact vibration, but also rise the high frequency inherence attenuation vibration of the bearing

    滾動軸承振動信號具有背景噪聲強、不同故障引起不同特徵振動的特點。尤其是損傷類故障，不但會引起低頻沖擊振動，還會激起軸承系統的高頻固有衰減振動。
  17. It has made the strong basis for further studying mechanism of replication, virulence and determinant, attenuation, pathogenesis, functions of genetic products, specific diagnosis, cell and host tropism, development of dna vaccine and marker vaccine of csfv, and provided an excellent tool for molecular virology. main research contents include : based on published nucleotide sequences of csfv and by the help of computer analysis software, high conservative regions and single restriction enzyme sites of genome were selected. utilizing rt - pcr and nested - pcr techniques, 7 overlapping cdna fragments covering the full genome of csfv c - strain were successfully amplified

    中國豬瘟兔化毒（脾淋毒）基因組cdna文庫的構建、序列分析：根據已發表的豬瘟病毒（ csfv ）核苷酸序列，藉助計算機軟體分析，選擇高保守區段和基因組中的單一限制性酶切位點，利用rt - pcr及nested - pcr和helf - nestedpcr技術，成功地擴增出了覆蓋c -株全基因組的7個cdna重疊片段f1 f7 ，分別克隆到pmd - 18t或pgem - teasy載體進行測序后，拼接出了其核苷酸序列。
  18. System scheme of speech coding plus spread spectrum communication was presented based on a full analysis of noise characteristic, attenuation characteristic and impedance characteristic of low - voltage power line. spread spectrum carrier ( abbreviated as ssc ) technology is adopted to overcome problems existing in signal transmission over power line. high quality, low rate mbe compression algorithm was used to complete speech encoding and decoding

    在對低壓電力線路的噪聲特性、衰減特性和阻抗特性三個方面充分分析的基礎上，本文提出一種語音編碼+擴頻傳輸的系統總體方案，採用擴頻載波（ spreadspectrumcarrier ，縮寫為ssc ）技術克服電力線傳輸信號存在的問題，採用語音合成質量高並具有較低碼率的mbe壓縮演算法完成語音信號的編解碼。
  19. A series of geologic models are set up. basing on those models the computer simulation is finished, the results prove that the improved data acquisition system can compensate the absorbtion and attenuation, high ten the resolution as well

    結果證明，改進后的採集系統在很大程度上補償了由於地層吸收衰減等因素所造成的能量和頻率的衰減，同時提高了解析度，效果明顯。
  20. Those kinds of waveguide have got the ability that could be used to deliver high energy ir light with low attenuation. but these attenuation phenomena ca n ' t be explained by current theory about character in hollow waveguide

    雖然這些光纖已經被廣泛用於在較低損耗下傳輸紅外激光能量，但是現有的關于空芯光纖的傳輸理論還不能很好地解釋空芯光纖中的損耗與模式特性。
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