attenuation range 中文意思是什麼

attenuation range 解釋
衰減范圍
  • attenuation : n. 1. 變薄，變細。2. 減少，減弱。3. 稀釋。4. 【物理學】衰減。
  • range : vt 1 排列；整理（頭發等）。2 使歸類[班、行、隊]；把…分類。3 〈用被動形或反身形〉加入，站住…的一邊...
  1. According to the minimum detectable power required by the spaceborne laser altimeter for 200km maximum range and the analysis result of the effect between the maximum range and the equation ' s each parameter, the specifications for noncooperative regulable attenuation setting were fixed on

    根據月球探測激光高度計實現200km所需的最小可探測功率，各影響因子與最大測程關系的分析，確定非合作目標可調衰減法裝置的技術指標。
  2. The maximum range is the most important specification for a laser altimeter and 200km is the required level for the spaceborne laser altimeter in the lunar resources survey. in the paper, one kind of method and setting characterizing the laser altimeter ' s performance aiming at the specification of maximum range - noncooperative regulable attenuation was put forward and founded

    中科院知識創新重大方向?月球資源探測衛星激光高度計，要求實現200km的對月測距能力，本文以地面驗證激光高度計最大測程指標為目標，提出並建立一種激光高度計性能驗證方法?非合作目標可調衰減法和裝置。
  3. Based on the analysis of the effect on the maximum range of the equation ' s each parameter and the traditional method of extinction ratio, the noncooperative regulable attenuation - measure the minimum detectable power of laser altimeter on the condition of constant miss probability by attenuating the laser power transmitting to the diffuse reflected simulant target - was put forward

    在傳統的消光系數法基礎上，根據對月測距方程各系數的影響權重分析，提出了非合作目標可調衰減法，即：通過對漫反射模擬目標，衰減出射激光功率，在一定的漏警概率條件下測量激光高度計的最小可探測功率。
  4. Due to the uncertainty of factors such as far - range, atmospheric attenuation and operated target, a steady and reliable method and setting to characterize laser altimeter ' s performance is an important and difficult technology

    由於測程遠、大氣衰減、被測目標物等不確定性因素，建立一種穩定可靠的激光高度計性能指標驗證裝置和方法，是一項重要的、必須解決的技術難點。
  5. Electro - optical curves for lc cells have been analyzed and it has been shown mat a large attenuation range and a shallow attenuation slope can be achieved simultaneously for a variable optical attenuator based on a parallel - aligned lc cell with an appropriate surface anchoring strength. as compared with the existing liquid crystal - based voa structure ( using two cascaded lc cells with a particular material ), the present structure is simple and has no special requirement for the lc materials

    提出了基於弱錨定平行排列液晶盒的可變光衰減器（衰減范圍大、衰減曲線下降平緩以保證調節精度） ，與己有液晶型可變光衰減器結構（選用特定液晶材料、兩個液晶盒級聯結構）相比較，本論文提出的基於弱錨定平行排列液晶盒的可變光衰減器結構簡單，同時對于液晶材料無特殊要求。
  6. 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。
  7. Experiment contrast show, the prepared w - type planar hexaferrite microwave absorptive material appears two absorptive peaks in the frequency range of ( 7 ~ l2ghz ), its average attel1uation exceed 7db, the maximum absorptive attenuation is 24db, coat matching thickness is l. 21mm, especialy its curie temperature is 457c. so, it can meet practical demands in military camouflage field

    實驗結果表明，該種吸收材料在x波段內呈現兩個吸收峰，平均衰減量7db ，最大吸收峰為24db ，塗層匹配厚度為1 . 21mm ，特別是具有457的居里溫度。所以該種鐵氧體是一種性能優良的微波吸收材料，在軍事隱形技術中有實用價值。
  8. Atmospheric attenuation of scene contrast is studied theoretically on the basis of radiometric principles, and the relationships between the measured maximal detection range for a target and visibility distance under two possible conditions are obtained

    根據輻射度學原理，從理論上研究景物對比度在大氣傳輸中的衰減，得到了在兩種可能的條件下所測得的目標最大探測距離與能見距離的關系。
  9. The results show that these algorithms for attenuation correction can work well in the valid range and their effects on attenuation correction are almost identical. when attenuation is strong or measurement error of real echo is large, however, the result from the h - b algorithm for attenuation correction is not good

    結果表明：在有效的訂正范圍內，幾種訂正方法均能得到很好的訂正，並且訂正效果幾乎保持一致，但h - b演算法在衰減作用很強或實際回波測量值誤差很大時，其訂正結果就變得不可靠了，從而造成訂正能力下降。
  10. Firstly, the characteristics of radiation propagation and attenuation in the atmosphere, and the power response of a contrast - limited optoelectic system are analyzed, the apparent contrast model of a target is developed, and the detection range equation dependent on the aerosol extinction coefficient and range parameter are derived

    首先，分析了紅外波段大氣輻射傳輸與衰減、對比度限制光電成像系統功率響應特性，建立了目標表現觀對比度模型，並推導出了由氣溶膠消光系數和距離參量確定的探測距離方程。
  11. The attenuation indexes of vertical direction components and level radial components of blast earthquake wave in the condition of far range are all larger than the one in the condition of close range. based on upwards analysises, relevant control ways and safety defending technology of blast vibration are given from the aspects of blast equipments, blast parameters, landform physiognomy, blast methods. and taking the practical data from blast scene as the sample, the blast shockproofness are forecasted by the feedforward nerve network model based on the prior knowledge of blast shockproofness, the regress analysis method and experience formula method, which supply the technology gist for

    並且，以爆破現場的實測數據為樣本，採用基於爆破震動強度先驗知識的前饋網路神經模型、回歸分析法及經驗公式法分別對爆破震動強度進行了預測研究，為爆破施工參數的確定提供了技術依據，確保整個爆破工程順利安全進行，並對這三種方法的預測結果進行了對比分析;對比分析表明，三種預測方法計算出來的結果精度相差甚大，從檢驗樣本值與預測結果值之間的相對誤差可以看出，人工神經網路法預測的結果較其他方法更接近於實際值，回歸分析預測法的精度又要高於經驗公式預測法。
  12. This property represents an attenuation constant as a fixed - point value with the valid values range from zero to

    此屬性是一個定點值，表示衰減常數，該常數的有效值范圍為零到
  13. The laboratory offers calibration service for coaxial fixed and step attenuators. the frequency range covers 300 khz to 18 ghz and attenuation range of 0 to 70 db

    本所可為同軸的固定及階調衰減器提供校正服務。頻段由300khz至18ghz ；衰減幅度由0至70db 。
  14. The system designing of fvisar are discussed in detail in charpter three. especially, the quantitative analysis and simulation research of the velocity range, fringe constant selection and attenuation of fiber delay line are intruduced

    第三章對全光纖速度速度傳感器的系統設計做了詳盡的討論，包括系統光源的選擇、條紋常數分析、光纖延遲線的損耗對調制度的影響、光信號接收單元、數據處理單元。
  15. On our conjecture, gene 3a, a highly conserved sequence, may be the determinant of the virulence of fmdv. changes in 3a have been associated with altered host range. a deletion in 3a has been associated with bovine attenuation of fmdv

    我們根據已有資料推測， 3a基因可能是口蹄疫病毒的毒力決定簇，它具有高度保守性，其變異和部分缺失對病毒在牛體內的致弱和宿主嗜性發生改變起重要作用。
  16. Acoustics - methods for measuring the longitudinal sound speed and attenuation coefficient of rubbers and plastics in the frequency range 1mhz to 10mhz

    聲學1 10mhz頻率范圍內橡膠和塑料縱波聲速與衰減系數的測量方法
  17. 2. one voltage controlling manner is presented. this manner combines amplification and attenuation, and fine control and coarse control can be operated separately, it can adjust the amplitude by 1mv step in the range of 50mv to 10vpp conveniently

    2 .提出一種放大與衰減相結合，精細控制和粗略控制分別進行的電壓控制方式，可以方便地實現信號幅度在50mv ? 10vpp之間以1mv的步進改變。
  18. Real - time characteristics of data transmission, remarkable transmission, error - detection and automatic retransmission built in can protocol make it a good option for power line carrier communication, which has some obvious drawbacks such as wide - range variant input impedance, interference and signal attenuation

    Can協議中數據的實時傳輸、卓越的錯誤檢出及自動重發功能為建立高效的基於電力線載波（電力線介質存在著大范圍變化的輸入阻抗，較強的干擾和信號衰減）的can通信系統提供了方便。
  19. Besides this, a bypass multi - mode waveguide were used to improve attenuation efficiency and reduce power consumption. based on buried channel structure, the simulation software beamprop ? produced by rsoft corp shows some better results than the original device : attenuation range over 20 higher, insertion loss merely 1db higher and the calculated power consumption is only 25mw

    加入的旁路吸收波導和多模區間距為零時最大衰減對應的溫度為60 ，衰減增加了20db以上，功耗也增加了1倍，插入損耗比間距為1 ， 2 m時增加約0 . 4db ，比沒有旁路波導時插入損耗增加了約ldb 。
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