頻譜特性 的英文怎麼說

中文拼音 [bīnpǔtèxìng]
頻譜特性 英文
spectral characteristics
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 譜 : Ⅰ名詞[書面語]1 （按類別或系統編成的書或冊子等） table; chart; register 2 （指導練習的格式或圖形）...
  • 特 : Ⅰ形容詞（特殊; 超出一般） particular; special; exceptional; unusual Ⅱ副詞1 （特別） especially; v...
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 頻譜 : frequency spectrum; frequency content; spectrum; power density spectrum; power spectrum; [系統] s...
  • 特性 : characteristic（s）; character; performance; features; properties; behaviour; response; character...
  1. Conclusion this result shows that that the pinna and concha have almost no effect no sound localization in horizontal plane, which means spectral characteristic does not possihly dominate in horizorntal plane

    結論實驗表明耳廓和外耳道對水平方向的聲音定位幾乎無影響，也就是說在水平方向上的聲音定位，耳廓和外耳道的濾波、共振等改變聲波頻譜特性作用可能不明顯。
  2. It shows that hard layers barely affect the ground motion and can thus be neglected in general. the soft layers, on the other hand, can influence the ground motion greatly, i. e., seismic response will decreases when the period less than 0. 1s and it increases when period greater than 0. 3s, but it will not change significantly for the long period over 3s. therefore the whole effect of the soft layers on earthquake ground motion in fact depends on the characteristic frequencies input

    研究結果表明，硬夾層的影響很小，一般情況下，可以不予以考慮；軟夾層有較顯著的影響，其影響主要表現為：對周期小於0 . 1s的高頻段反應減小，對周期大於0 . 3s的較長周期段反應增大，而對周期長達3s及以上周期段反應幾乎無影響，因此，軟夾層對場地地震反應影響的總體作用是增大還是減小反應，取決于計算基底輸入地震動的頻譜特性。
  3. A large planar microphone array, which consists of 111 microphones, was successfully applied to obtain a two - dimensional mapping of the sound sources on a landing aircraft. the focus of study in this paper is on the landing gear noise source. the spectra, directivities and sound pressure levels of flap side - edge noise of 7 narrow - board commercial aircraft and 7 wide - board commercial aircraft are presented. it is found that the landing gear noise spectrum is broadband with some single tones in some cases. the directivity of the total sound pressure level of a landing gear noise resembles that of a horizontal dipole. the level differences between the various aircraft landing gears are larger than those expected from the airspeed differences. it is thus expected that the louder noise emission of the landing gears can be reduced by redesigning

    應用由111個傳聲器組成的平面傳聲器陣列對當前流行的民用客機進場著陸過程中的機體噪聲源進行了實驗測量，本文對七架窄體客機和七架寬體客機的起落架噪聲進行了分析，得到了起落架噪聲的頻譜特性、指向特性和聲級變化.研究發現，起落架噪聲的頻譜是由寬頻隨機噪聲與一些較為明顯的單音噪聲源組成，起落架噪聲的指向性類似於一個水平放置的偶極子.不同飛機起落架噪聲的聲級相差較大，這說明可以通過重新結構設計降低起落架噪聲。
  4. In order to investigate the unsteady flow frequency domain performances of an axial flow compressor at different mass flow, rotating speed and blade row spacing, plus inlet flow distortion, and considering aerodynamic characteristics and stability of the compressor, the low speed research compressor ( lsc ) at college of energy and power in nuaa is used to carry out the experiment studies. a large amount of test data has been gained through dynamic pressure transducers embedded in the stator blades at the tip, middle and hub section, then fast fourier transform algorithm ( fft ) is applied to calculate the frequency data

    為探討軸流壓氣機在工作流量、工作轉速及動?靜葉排軸向間距變化時的葉片排流場非定常頻譜特性變化規律，並耦合進氣畸變的影響，同時與壓氣機氣動性能和氣動穩定性相關聯，作者利用南京航空航天大學能源與動力學院的低速大尺寸軸流壓氣機（ lsc ）試驗器，採取在靜子葉片表面埋入動態壓力傳感器的實驗方法，對葉尖、葉中和葉根三個截面的動態壓力進行了測量，獲得了大量的可靠的實驗數據。
  5. Effect on the characteristics of fatigue life of composite soils and dynamic modulus were discussed. the deformation behavior of stabilized soil on static and dynamic loading were compared. the characteristics of frequency spectrum of composite soils were analyzed in the thesis

    對水泥?水玻璃加固土進行循環荷載下的疲勞試驗研究，分析水泥?水玻璃加固土的疲勞壽命及其影響因素，以及固結土的動模量特徵，並對水泥土在動、靜荷載作用下的變形特徵進行比較，分析對比不同振幅與頻率的動荷載作用下的水泥加固土的應變響應及其頻譜特性。
  6. This dissertation mainly studies the pulse compression waveform designing and signal processing, including the following aspects : firstly, by the pulse compression basic theory, the linear frequency modulation signal ( lfm ), binary phase - coded signal ( bc ) and stepped - frequency ( sf ) signal are discussed respectively including the ambiguity function, pulse compression and spectrum characteristic

    本文主要進行脈沖壓縮雷達波形設計以及信號處理方面的研究，主要體現在以下幾個方面:首先，從脈沖壓縮基本理論出發，分別給出了線性調頻、二相編碼和頻率步進信號的模糊函數、脈沖壓縮以及頻譜特性，對多普勒性能進行了簡要分析。
  7. Abstract : a large planar microphone array, which consists of 111 microphones, was successfully applied to obtain a two - dimensional mapping of the sound sources on a landing aircraft. the focus of study in this paper is on the landing gear noise source. the spectra, directivities and sound pressure levels of flap side - edge noise of 7 narrow - board commercial aircraft and 7 wide - board commercial aircraft are presented. it is found that the landing gear noise spectrum is broadband with some single tones in some cases. the directivity of the total sound pressure level of a landing gear noise resembles that of a horizontal dipole. the level differences between the various aircraft landing gears are larger than those expected from the airspeed differences. it is thus expected that the louder noise emission of the landing gears can be reduced by redesigning

    文摘:應用由111個傳聲器組成的平面傳聲器陣列對當前流行的民用客機進場著陸過程中的機體噪聲源進行了實驗測量，本文對七架窄體客機和七架寬體客機的起落架噪聲進行了分析，得到了起落架噪聲的頻譜特性、指向特性和聲級變化.研究發現，起落架噪聲的頻譜是由寬頻隨機噪聲與一些較為明顯的單音噪聲源組成，起落架噪聲的指向性類似於一個水平放置的偶極子.不同飛機起落架噪聲的聲級相差較大，這說明可以通過重新結構設計降低起落架噪聲。
  8. The outputs of tests on the thin plate under different inputs have been investigated for testifying the system. different solutions have been compared according to the frequency - spectrum characters and structure modal parameters. it is indicated that the solutions in this paper are consistent with the solution of the fea methods

    以薄鋼板為實例，探討了不同激勵條件下，包括正弦穩態激勵、正弦慢掃描、單次錘擊和隨機錘擊激勵，薄鋼板振動系統的響應情況，以頻譜特性和模態參數為參考，將各種方法的求解結果作了比較，結果表明：本系統得出的結果與有限元解具有一致性。
  9. The analysis on unilateral, bilateral and lateral - torsional coupled seismic response of base - isolated structures with combined isolation systems is carried out, and the control of lateral - torsional coupled seismic response of structures is discussed. the energy analysis on base - isolated structures is conducted by energy method. the influence on the total input earthquake energy owing to the frequency, intensity and lasting - time of earthquake and so on is studied

    採用能量方法，建立基礎隔震結構能量反應方程，對基礎隔震結構地震反應進行能量分析，研究地震動的頻譜特性、幅值、持時、上部結構自振周期及隔震系統動力性能等因素對結構總輸入能量的影響;並對基礎隔震結構進行耗能分析，研究結構總輸入能量在結構中的分配，為基礎隔震結構能量設計提供依據。
  10. Experimental study on frequency spectrum characteristics of blast vibration wave

    爆破振動頻譜特性實驗研究
  11. The gas - particles two - phase flows in the horizontal pipe and u - beam separator were also studied in this thesis. electrical capacitance tomography ( ect ) is a new method to measure the volume distribution of solids. it is not affected by the opacity of particles

    實驗測量上，本文採用電容層析成象技術測量了旋風分離器內部顆粒的濃度分佈，分析了顆粒在分離器錐體部分的濃度分佈規律、概率及頻譜特性。
  12. The experimental results show that the unsteady flow frequency domain performances of the axial flow compressor will be varied with mass flow, rotating speed, blade row spacing and inlet distortion

    實驗結果表明，工作流量、工作轉速、動?靜葉排軸向間距以及進氣畸變均對壓氣機的非定常頻譜特性產生影響。
  13. This paper is mainly about land clutter and sea clutter. it meanly introduced scatter character, radar echo signal range, and power spectrum model. in the end, a hardware realization of producing a specified power spectrum is given

    本文主要研究了地、海雜波的散射特性、回波幅度特性和頻譜分佈模型，並且給出了一種硬體實現產生具有一定頻譜特性的雜波的方案。
  14. First, this dissertation analyses the waveform of chirp - subpulse stepped frequency signal, studies and simulates the ambiguity characteristics, the spectrum structure and the basic process to obtain high resolution range profiles, and discuss this signal ’ s high range resolution characteristic and wide spectrum characteristic

    首先，本文對chirp子脈沖頻率步進信號進行了波形分析，研究了chirp子脈沖頻率步進信號的模糊特性、頻譜結構以及合成高分辨距離像的基本過程，討論了chirp子脈沖頻率步進信號的高距離分辨力和寬帶頻譜特性。
  15. On the other hand, the calculation on difference earthquake wave show : the spectrum of earthquake wave will affect dynamic property of structure like long period of xiao wan dam

    另外，不同性質的地震動輸入所得的計算結果表明，地震波的頻譜特性對于小灣大壩這樣的長周期結構的動力反應特別是位移反應有明顯的影響。
  16. We also use fourth runge - kutta method simulate the opcpa process in the case of considering signal and pump temporal profile and phase mismatching and get gain and spectra properties at different pump temporal profile

    我們還在考慮時間波形和相位失配的情況下，利用四階龍格-庫塔法對光參量啁啾脈沖放大進行了數值模擬計算，得到了不同泵浦光時間波形時的增益與頻譜特性。
  17. From the experimental results, we studied the relationship between the diameter of fiber, the composition of s s and the impacts upon the electromagnetic parameter of fibers. get following conclusions : both the complex permeability and the complex permittivity of ss fibers decreased with the increase of diameter in some region, the complex permittivity of 304 ss fibers, 2 m in diameter, could be up to 2. 5 at the 2 ghz, the 302 ss fibers had better frequency dispersion properties than others, agreed with the requirements of the wide - band radar absorbing material in the range of 2ghz ~ 12ghz

    西安建築科技大學碩士學位論文討論了影響不銀矜岡纖維電磁參數的幾個因素，實驗結果出發研究了纖維直徑、成分對纖維電磁參數的影響，得到以下結論:不鉀練岡纖維的微波磁導率隨纖維直徑的減小而增大; 2微米的304不銹鋼纖維的復數磁導率p 』 『在zgi ]吃處達到2 . 5 ; 302不韌矜岡纖維電磁勝能明顯優于其它兩種，且頻譜特性在2 ~ 1zghz范圍內符合對吸收劑頻譜特性的要求。
  18. Meanwhile through analyzing the characteristic of the frequency spectrum of real seismic load, the influence of sismic load ' s feature period on dynamic response result of the grotto rock 15 revealed

    並通過對地震荷載的頻譜特性分析，揭示了地震荷載的特徵周期對錨索加固石窟圍巖的動力響應結果的影響。
  19. 1 in the research of design of radar waveform, one kind of hybrid radar waveform obtained by combining the chirp waveform with the non - periodic pseudorandom sequences is discussed. through the theoretical analysis and computer simulation, several main characteristics of this kinds of hybrid waveforms are discussed, such as the ambiguity function, ambiguity graph, the spectrum, the weighting methods, the response of the processing filter and the low probability of interception. those are showing the effectiveness of the new hybrid waveforms on the performance of high resolution and low probability of interception

    作者在以下幾個方面的研究工作中取得了進展及創新： 1 、在雷達波形設計中，介紹了一類新的線性調頻信號與非周期隨機編碼信號相結合的組合波形的組合形式，通過理論分析和大量的計算機模擬研究了這類組合波形的模糊函數（圖） 、頻譜特性、多普勒頻移特性、加權輸出特性、低截獲等方面的特點，證明了新型的組合波形在高分辨、低截獲等方面的有效性。
  20. The intersystem frequency interference among 3g communication systems secondly, lemp was researched. mechanism and spectral characteristic of lemp were analyzed in detail. the attacking form of lemp to base station was discussed

    第二，對雷電電磁脈沖進行了研究，詳細分析了雷電電磁脈沖的產生機理以及雷電電磁脈沖的頻譜特性，討論了雷電電磁脈沖對寬帶無線接入基站的襲擊形式。
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