modulation 中文意思是什麼

音標 [ˌmɔdju'leiʃən]
modulation 解釋
n. 名詞 調整,調節;(聲調的)抑揚,變化;【音樂】轉調,變調;【無線電】調制。
amplitude modulation 振幅調制,調幅。
frequency modulation 頻率調制,調頻。
overmodulation 過(度)調(制)。

  1. And then facing the problem of the channel estimation of the adaptive modulation system, we conclude out the channel estimation algorithms on maximum likelihood ( ml ) estimation and maximum a posteriori ( map ) estimation under the condition of flat fading channel and selective fading channel in detail. to meet flat fading channel, we simulate the relationship of the ratio between the error covariance in map estimation and ml estimation and pilot symbol message length. the conclusion can be drawn from these results

    接著,對自適應調制系統中的通道估計問題難點,詳細推導了平衰落通道條件下和選擇性衰落通道條件下最大似然( ml )估計和最大后驗概率( map )估計演算法,針對平衰落通道,我們模擬了map估計和ml估計的方差與導頻符號長度的關系,模擬結果表明,錯誤方差受多譜勒頻率的變化影響最大,並且對實際的自適應調制系統,導頻符號長度的取值超過20個符號長度時, map通道估計明顯優于ml通道估計。
  2. Not only the neurons but also the as in the rat brain play a very important role in the process of the peripheral nociceptive stimulation ; ? he newly - found eda may be the functional intercommunication ultrastructure between neurons and as, through which the as could modulate the neurons in the pain signal processing ; @ as might play an active and important role for modulation of pain through a new pathway from the peripheral afferent nerve to the as, then to neurons via electron - dense areas forming the glia - neuron s ignaling network

    光、電鏡水平發現as與神經元之間有多種途徑進行信息交流,新發現的eda有可能是神經元與as之間信息交流的結構之一。阻斷as與神經元間信息交流連接后,前者對外周組織4第四軍醫大學博士學位論文損傷所致疼痛的反應不受影響,而後者的反應明顯受到抑制,提示在非病理性疼痛反應中,膠質細胞對神經元具有主動調控作用。
  3. Using ewb to simulate amplitude modulation and detection

    對振幅調制與檢波電路進行模擬
  4. Companding single sideband amplitude modulation cssb am

    壓擴單邊帶調幅
  5. Telephony using amplitude modulation single sideband full carrier

    單邊帶全載波調幅電話系統
  6. Amplitude modulation and demodulation circuit

    振幅復?調迴路
  7. Vsb - am estigial sideband - amplitude modulation

    殘留邊帶調幅
  8. Multi - level quadrature amplitude modulation

    多電平正交調幅
  9. Amssb amplitude modulation, single side - band

    單邊帶調幅
  10. Amdsb amplitude modulation double side band

    雙邊帶調幅
  11. Qam for quadrature amplitude modulation

    積分幅度調制
  12. Cap carrierless amplitude modulation

    無載波幅度調制
  13. Abstract : radiate thermometer uses a high definitive operation circuit in the modulation and linerization of weak optical signals. the theory of colorimetry was used in measuring the temperature. analogic channel and digital interfaces were added in order to expand the instrument. a kind of double channel ' s photocolorimeter including its hardware and software is introduced

    文摘:輻射測溫計採用高精度運算電路,對光弱信號進行調制和線性化處理,運用比色法原理對溫度進行檢測.為了便於儀器擴展,增加了模擬量輸出和數字介面,並對光纖式雙通道比色高溫儀的硬體與軟體的關鍵部分作了簡要介紹
  14. The research of base band ijf coding and modulation technologies

    編碼調制技術的研究
  15. This system of modifying the carrier waves is called "amplitude modulation, " or "am".

    這個改變載波的系統稱為「振幅調制」或縮寫為「AM」。
  16. This system of modifying the carrier waves is called " amplitude modulation, " or " am "

    這個改變載波的系統稱為「振幅調制」或縮寫為「 am 」 。
  17. Mixed modulation chloroprene rubber cr321, cr322

    混合調節型氯丁橡膠cr321 cr322
  18. Cr321 cr322 mixed modulation chloroprene rubber cr321, cr

    混合調節型氯丁橡膠
  19. Garcialafuente a, antolin m, guarner f, et al. modulation of colonic barrier function by the composition of the commensal flora in the rat j. gut, 2001, 48 ( 4 ) : 503507

    王新,周昱,楊彥民,等.麗珠腸樂治療直腸癌術后腸道菌群失調臨床療效觀察j .中國微生態學雜志, 1997 , 9 ( 4 ) : 4043
  20. On the base of researching the theory of the scheme and analyzing the signal feature, it is obtained that the existence manners and character of distance information in the differential frequency signal. at the same time, a new conclusion is gained that the technology of frequency agility can decrease the constant error of system. it is also to say that frequency agility and frequency modulation fixed - distance fuze has the similar feature to random period frequency modulation fixed - distance fuze. according to the theory of address coding in the hopping - frequency communication, the paper presents the principle of selecting the frequency agility sequence which fit to the radio fuze and constructs the frequency agility sequence family based on the rs codes

    在深入研究方案原理和分析信號特徵的基礎上,獲得了該體制引信差頻信號中,距離信息的存在形式和特點,得出了頻率捷變技術的引入降低了系統定距固定誤差這一新的結論,即頻率捷變調頻定距引信在定距性能上具有類似隨機周期調頻定距的特徵。本文引入跳頻通信地址編碼理論,結合無線電引信的具體特徵,提出了適用於無線電引信的頻率捷變序列的選擇原則,並構造了基於rs碼的寬間隔頻率捷變序列族。
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