spectrum factor 中文意思是什麼

spectrum factor 解釋
頻譜因數
  • spectrum : n. （pl. -tra ）1. 【物理學】譜，光譜；波譜；能譜，質譜。2. 【無線電】射頻頻譜；無線電（信號）頻譜。3. 【心理學】（眼睛的）余像；殘像。4. 〈轉義〉范圍，幅度；（連續的）系列。
  • factor : n 1 〈英國〉經銷人；（代客買賣收取傭金的）經紀人；代理商；代辦人；〈蘇格蘭語〉 土地經管人。2 要素...
  1. By using ofdm technology, we can redu ce the baud rate with a high frequency spectrum utility factor. another advantage of this technology is that the transmission can combat the intersymbol interference ( isi ) at the receiver without complex adaptive equalizer

    Ofdm既有較高的頻譜利用率，也有效地降低了碼速率，在不使用復雜的通道均衡技術的條件下仍然可以較好地克服接收時由多徑效應帶來的碼間串擾（ isi ） 。
  2. In this thesis, for the merits of high frequency spectrum utility factor and high - speed data communication, the ofdm is introduced into the underwater acoustic communication. combined with fec to combat the frequency - selective fades and isi in the underwater acoustic channel, high speed data transmission is realized by employing ofdm technology

    本研究嘗試將ofdm技術引入水聲通信領域，利用該技術頻譜利用率高，多載波并行傳送的特點，結合通道編碼，以克服水聲通道多徑干擾引起的頻率選擇性衰落和碼間干擾，獲得高速率數據傳輸。
  3. Therefore, the crucial factor of technology of nucleus - detection is nuclear spectrum data collecting system whose core is the multi - channel analyzer ( mca )

    所以以多道脈沖幅度分析器為核心的核能譜數據採集系統，是核輻射探測技術的關鍵。
  4. Mean shape factor and rms shape factor distributed on the roof of the structure with b exposure are measured. based on using of a multi - point high - speed pressure scanning system on rigid model, wind - induced dynamic responses are discussed by the method of power spectrum analysis

    分析了在b類地貌類型下風荷載的分佈特性，並根據剛性模型同步測壓技術以及屋蓋結構風致響應的譜分析方法，分析討論了結構動態響應，並討論了結構前幾階模態對系統響應貢獻。
  5. The in - house system evaluation and field application showed that an excellent oil film for shielding temporary plugging could be formed near borehole wall and both plugging and recovering rates of permeability reached more than 90 % when the added amount of the broad spectrum oil film temporary plugging agent gpj reached 3 % ; skin factor decreased by 7. 4 to 10 times and production increased by 1. 82 to 2. 96 times compared with conventional technology

    結果表明，當廣譜「油膜」暫堵劑gpj的加量達到3 %時，可在近井壁處形成很好的屏蔽暫堵「油膜」帶，滲透率堵塞率和恢復率皆大於90 % ，與常規屏蔽暫堵技術相比，可使油層損害程度降低7 . 4 ~ 10倍，產量提高1 . 82 ~ 2 . 96倍，而且與油層滲透率和溫度無關。
  6. In addition, the study shows that the cmes " traveling direction is also an important factor, which influence the intensity of the geomagnetic storms. we also analyzed gcrs data from beijing super - neutron - monitor ( snm ) by using fft and power spectrum method

    我們對cme運動方向與磁暴強弱的關系進行了初步的研究，研究表明，同樣條件下，正對磁層頂的cme形成的磁暴更強，即cme的運動方向是影響磁暴強弱的一個重要因素。
  7. This paper introduces the development and present situation of vibration absorb technology in the world ; generally analysis the rubber - bearing ( rb ) and lrb " s operative mechanism, function and the calculation of parameter ; advance the concept of standardization to lrb ; on the basis of generally analyzing the connected factor such as the site category, the diameter of lead bar, the height of bearing, the designing carrying capacity, the span of bridge, the inherent period and the displacement of rb, determine the parameter, the absorbing vibration target, the method and the process of standardization to lrb ; then according to the two - step rule of resisting and defending earthquake, and combining with the response spectrum theory in the seismic vibration of bridge, make a lot of calculation and analysis of vibration absorb design to the real bridge collected and combined by finite element program ; at last, gives the result of standardization through diagram and explains to its usage

    本論文介紹了國內外減震技術的發展和現狀；綜合分析了普通板式橡膠支座和鉛銷橡膠支座的工作機理、性能及參數的計算；提出了鉛銷橡膠支座標準化的概念；在綜合分析場地土、鉛銷直徑、支座高度、設計承載力、橋梁跨徑、固有周期以及支座變位等影響因素的基礎上，確定了鉛銷橡膠支座標準化的參數、減震目標、方法和過程；並根據抗震設防兩階段原則，結合橋梁地震振動理論的反應譜法，運用有限元程序對收集和組合的實橋進行了大量減震設計的計算和分析；最後以圖表的形式給出了鉛銷橡膠支座標準化的結果，並說明了其使用方法。
  8. To accommodate more users with limited spectrum, the radius of new cellular will be much smaller, the factor of spectrum reuse will be more tight

    為了在有限頻譜范圍內滿足更多的用戶需要，通信系統的蜂窩半徑越來越小，頻率復用密度越來越高。
  9. The angle spectrum of inputting optical signals is received by the input surface of arrayed waveguides. whereas the diffraction process of light beam outputed in slab waveguide is a process of " composing frequency and generating image ". the reason that fraunhofer diffractive pattern can be gained on outputting waveguide surface is that output ends of arrayed waveguide distribute on the arch structure which leads bent phase factor to offset the quadratic phase factor in fresnel diffraction

    輸入平板波導內光束的衍射過程是「分頻成譜」的過程，在陣列波導的輸入面接收到的是輸入光信息的角譜；而輸出平板波導內光束的衍射過程則是「合頻成像」的過程，正是由於陣列波導輸出口排列分佈在圓弧形結構上，其彎曲位相因子消去了菲涅耳衍射中的二次位相因子，從而在輸出波導面上能夠得到夫瑯和費衍射圖樣。
  10. Our results suggested the accumulation of ft in muscle was not the only factor that affected " spectrum shift " during muscle fatigue. the decline of the firing rate of motor units, the synchronization of motor units and an inadequate cns drive may be the important mechanisms that attributed to the change of semg signal during isometric contractions

    本研究認為肌肉疲勞過程中h ~ +濃度升高不是導致肌電功率譜曲線左移的唯一因素，運動單位放電頻率下降、中樞驅動減弱和運動單位活動的有序性或同步化可能是肌肉活動時肌電信號變化的一種重要機制。
  11. By testing some parameters, such as the maximum non - seizure load, the shape and diameter of wear scar, the friction factor, the nanometer caco3 particles " properties of extreme pressure, anti - wear and friction reduction have been tested and analyzed. the properties of the nanometer caco3 particles " tribology chemistry have been analyzed through x - ray photoelectron spectrum test. also the nanometer caco3 particles " mechanism of anti - wear and friction reduction has been studied systematically

    通過測試最大無卡咬負荷、觀察磨斑表面形貌和測定磨斑直徑以及測試摩擦系數，對納米碳酸鈣粒子的極壓性能和抗磨減摩性能進行了分析和研究；通過xps測試對納米碳酸鈣潤滑油添加劑進行了摩擦化學的分析和研究，對于納米碳酸鈣粒子的抗磨減摩機理做了系統的分析。
  12. Under the horizontal earthquake action and wind force, aim at " the pure frame structure with rectangle columns ", " the pure frame structure with special - shaped columns ", " the frame - truss structure with special - shaped columns " and " frame - shear wall structure with special - shaped columns ", earthquake action analysis was done by the spacial finite element method through the changes structural parameter. analyzing systematically " structure vibration mode ", " vibration period ", " structure lateral rigidity ", " seismic action force ", " seismic response force ", " floor seismic shear force ", " lateral horizontal displacement of structure " and " members internal force ". results indicate : ( 1 ) based on equal area, the special - shaped columns replaced the rectangle columns, the structural lateral rigidity enlarges, the lateral displacement minishes obviously, the earthquake response increase slightly, the biggest increasing amount of frame columns axis - compress ratio is smaller than 0. 08. the whole aseismic performance of structure has improved ; ( 2 ) when the section ' s length and section ' s thickness ratio of special - shaped columns is smaller than 3. 6, the structure benefits to resist seismic action ; ( 3 ) the angle of horizontal seismic action with the whole coordinate is 0 degree, structure earthquake response is bigger, belonging to a control factor of structure aseismic design ; ( 4 ) the frame - truss structure with special - shaped columns and the " a " - brace has the biggest lateral rigidity ; ( 5 ) the frame - shear wall structure with special - shaped columns have bigger lateral rigidity and smaller displacement, members internal force enlarged just rightly, have much superiority of resisting seismic action ; ( 6 ) in the higher seismic fortification criterion region ( 8 degree of seismic fortification intensity ), aseismic disadvantageous building site ( iii type site ), adopting special - shaped columns structure system, should reduce possibly the building ' s self - weight in order to reduce the earthquake response ; ( 7 ) the response spectrum method of computing seismic response and the time - history analysis method have similar analysis result

    西安理工大學碩士學位論文在水平地震作用下，並考慮風荷載組合，分別對「矩形柱純框架結構」 、 「異型柱純框架結構」 、 「異型柱框一析架結構」及「異型柱框-剪結構」等四種結構體系，通過改變結構參數，運用空間有限元方法，進行地震作用計算。系統地分析研究「結構振型」 、 「振動周期」 、 「結構側向剛度」 、 「結構地震反應力」 、 「樓層地震剪力」 、 「結構側向位移」 、 「層間位移角」 ，以及「構件內力」 。結果表明:在等面積原則下，異型柱代換矩形柱后，結構剛度增大，側向位移明顯減小，地震反應力略有增加，框架柱軸壓比最大增幅小於8 % ，結構整體抗震性能有所提高;當異型柱肢長肢厚比小於等於3 . 6時，結構有利於抗震;水平地震作用力與整體坐標夾角為0度時，結構地震作用效應較大，屬結構設計的控制因素之一;異型柱框一析架結構採用「人」字斜撐，側向剛度大於「八」字斜撐和「人一八」字混合斜撐;異型柱框一剪結構側向剛度大、位移小，構件內力增大適中，是一種抗震性能優越的結構體系:在抗震設防烈度較高地區（ 8度）和抗震不利的建築場地（ m類場地） ，採用異型柱結構體系時，應盡可能減輕結構自重，降低地震作用力;分別採用「振型分解反應譜」法和「時程分析」法進行地震作用計算，兩種方法所得結果基本一致。
  13. The inelastic demand spectra are established according to the new chinese seismic design code for buildings by means of force reduction factor r and ductility factor u, thus, a simple and practical method is established for seismic damage assessment in combination with capacity spectrum method ; the structure ' s push - over curve of second earthquake is gained by cutting the curve of quasi - test reversal load pattern method, thus, the structure ' s cumulate damage level can be computed by the capacity spectrum method too ; the results of an example are compared with the facts, and the validity and simplicity of this method is approved

    利用r -關系基於抗震規范彈性反應譜建立了能力譜方法中的需求譜，並將該法和能力譜方法結合，建立了一種簡單實用的結構損傷評估方法；對擬靜力循環往復加載曲線的截取，得到了第二次地震作用的push - over曲線，從而能夠繼續使用能力譜方法得到結構物的累積損傷值；通過算例闡述了該法的計算步驟，所得結果符合基本規律，且具有概念明確、簡單實用的優點。
  14. As a result, the low - frequency contents increase as the centroid of signal spectrum experiences a downshift, in case that frequency is independent on quality factor, the offset of the centroid frequency is proportional to the integral of attenuation factor along wavepath, thus can he used to reconstruct the attenuation distribution

    假設介質的品質因子與頻率無關，地震波主頻的偏移量與吸收系數對傳播路徑的積分成比例，則通過它們之間的關系可以估測介質的吸收系數。
  15. It is reported in this paper that by using the absorption spectrum of the interfering component as the denominator factor, the first derivative ratio spectra of the component mixture can be obtained, and the inter ference of one of the components can thus be eliminated

    利用混合物的波譜除以干擾組分的波譜得比值波譜，對波長求導得比值導數波譜，由此可消除干擾組分的吸光度疊加效應。
  16. ( 3 ) the spectral matching factor of nea phothocathodes for reflecting spectrum of objects under night sky radiation has been studied. the spectral matching factors of typical phothocathodes, such as gaas nea photocathode, s _ ( 251 ) and s _ ( 252 ) photocathode, are calculated and compared. the factors give the explanation of high detection performance of the low - light - level night vision equipments

    （ 3 ）研究了nea光電陰極和夜天光照射下景物反射輻射的光譜匹配系數，計算了gaasnea光電陰極的光譜匹配系數，並將之與s _ （ 251 ） 、 s _ （ 252 ）光電陰極的計算結果作了比較，揭示了三代微光夜視儀具有優良探測性能的原因。
  17. The layer analysis model of the three - dimensional limit equilibrium analysis of slope stability based on the similar mechanics of bishop ' s method and spencer ' s method, and the corresponding concepts of image of slide resistance factor spectrum of slide resistance factor n image of pull force distribution and spectrum of pull force distribution are introduced

    在此基礎上，介紹了以類似bishop法和spencer法的力學假定為條件的三維極限平衡的層分析模型，以及抗滑系數圖、抗滑系數譜、推力分布圖和推力分佈譜的概念。
  18. In this paper the author first analysed the wind effects on bridges, and wind - induced vibration is described in particular. second, two methods for wind effects on bridges are discussed, which include the method of gust response factors and the method of buffeting response spectrum. thirdly, from the requirement of practical engineering, the accurate analysis method is simplified according through the parametric analysis, the formula for engineering application of the second method is presented. finally, a realengineering example illustrate the usage of the two methods. and the result of the engineering example show that the stress calculated by buffeting response spectrum method is larger than which calculated from the gust response factor methed, also the temporary method of wind resistant ways for bridge in cantilever state is presented

    第二，分析了橋梁抗風分析的兩種方法，包括基於陣風系數的陣風分析法和抖振反應譜分析法。第三，從工程實際應用出發，通過參數分析，對精確方法進行適當簡化，推導出了橋梁在懸臂施工中的抖振反應譜法的實用計算公式。最後，通過工程實例，採用兩種抗風分析方法分別進行了分析計算，實例分析的計算結果說明反應譜法計算得到的內力大於按陣風系數法得到的內力；同時提出了在懸臂施工狀態工程施工中的臨時抗風措施。
  19. We revised frequency spectrum functions by using weighting factor - the distance between direct component and alternating component, and improved the acuity of focus measure curve

    提出用交流分量到直流分量的距離作為加權因子對頻譜評價函數進行改進，有效地提高了對焦評價曲線的靈敏度。
  20. The article studies the reflection and radiation light spectrum of the object under the night sky light or with the aid of laser, calculates and analyzes the spectrum matching factor of typical optoelectronic cathode to the common objects and the effect on the light contrast and give the detailed mechanical design of the low light night observing instrument on helmet

    摘要本文研究了夜天光照射及激光助視下的景物反射輻射光譜特性，計算並分析了典型光電陰極對常見景物反射的光譜匹配系數及其對照度、對比度等參數的影響，並詳細對頭盔式微光夜視儀進行結構設計。
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