third harmonic 中文意思是什麼

third harmonic 解釋
第三次諧波
  • third : n 1 〈the third〉第三。2 第三者〈指人〉。3 （時間或角度的）一秒的六十分之一。4 〈the third〉（某...
  • harmonic : n 1 【音樂】泛音；和聲。2 〈 pl 〉【數學】諧函數，調和函數。3 【物理學】諧波，諧音。adj 1 和睦的...
  1. Third, according to an example, the influence on soil displacement stress etc under harmonic vibration load induced by infiltration coefficient and loads frequency variation is studied numerically in dissertation. finally, the difference of layered saturated soils consolidation between rectangle and harmonic vibration loads is studied in this dissertation

    再次，以數值方法研究了簡諧荷載作用下成層飽和地基二維biot固結的一般規律，同時還研究了固結情況受滲透系數，頻率等參數影響的規律。
  2. With the third harmonic 355nm nd : yag laser as the exposal source, the lithography of su - 8 photoresist is studied

    本文採用波長為355nm的三倍頻nd : yag激光作為曝光光源，對su - 8光刻膠進行光刻研究。
  3. After a series of experiments, primary parameters of output are theoretically achivevd approximately gradually. its output, after second and third harmonic generation, will be appliedin great space ; and its function in the area of anti - laser and anti - ccd detection is not neglectable

    輸出激光經過二倍頻、三倍頻后，有極其廣泛的應用空間；在激光對抗與反ccd探測方面，它的作用更不容忽視。
  4. To resolve the situation that the sensitivity of present ground fault protection schemes is low for the large - sized hydro - generators, a kind of protection scheme based on the fault component of third - harmonic voltage and two kinds of protection scheme based on the fault component of zero - sequence voltage at the terminals and neutral are developed, and they can obtain higher sensitivity and reliability and provide 100 % protection for the stator windings. the influence of noise on the stator ground fault protection based on the local modulus maximum of wavelet transform is analyzed

    針對目前大型水輪發電機定子繞組單相接地保護靈敏度偏低的問題，通過分析單相接地故障后機端和中性點零序電壓的變化特點，提出了一種基於機端和中性點三次諧波電壓故障分量和兩種基於機端和中性點零序電壓故障分量的高靈敏度、高可靠性保護方案，並實現定子繞組的100 %保護。
  5. The detail study on the interaction between the electron beam and standing wave of complex cavity gyrotron with gradual transition and gyroklystron has been done in this dissertation, supported by the pre - study important items " the study on 8mm third harmonic gyrotron with a permanent magnet system " and " the study on 8mm high power gyroklystron ". the main works of this dissertation are listed as following : 1. the study on the rf distribution of the complex cavity with gradual transition is presented, in which the multi - modes coupling are taken into account

    本論文就是結合該課題組的「九?五」重點項目「 8mm三次諧波永磁包裝迴旋管技術的研究」及「十?五」重點項目「 8mm高功率迴旋速調管技術的研究」 ，對以諧振腔為互作用高頻系統的迴旋脈塞器件中兩種典型的器件? ?迴旋振蕩管及迴旋速調管中電子注與駐波場的互作用進行了深入細致的探討和研究，其中迴旋振蕩管採用的是漸變復合腔。
  6. Quark medium is regarded as non - harmonic oscillator model, discussing its response to su ( 2 ) non - abelia field, the perturlation expansion method is used to find the first, second and third order approximate solutions to the response equation, and some nonlinear features of the response are preliminarily displayed

    將夸克介質視為非簡諧振子模型，討論了它對su （ 2 ）非阿貝爾場的響應，採用微擾迭代法解出了方程的一、二、三級近似解，初步得出了這種響應的一些非線性特徵
  7. Have studied generator ground model mostly used in detail for middle and big domestic generator units. calculates and deduces fault current as grounding of single phase and third harmonic fault protection schemes. first time contributes overall knowledge about generator neutral grounding of distribution transformer with secondary resistor, in which considered inductance of the transformer to people

    針對大中型發電機的兩種主要接地方式進行了分析，進行了接地故障電流、三次諧波保護的計算推導，首次在接地變高阻接地方式有關公式推導中計入接地變感抗，從而使人們對接地變高阻接地認識更為全面。
  8. Combining with the practical project, the development of an instrument for multi - channel harmonic detection and analysis were described in the third chapter, including the system structure, hardware and software of the device. then the technology of multi - channel data gathering was discussed, and some key techniques have been presented including high precision 、 high speed sampling of the voltage and current, fast flourier transform ( fft ), data compression and storage techniques, planar graphic fitting, three dimensional graphic projection, multithreading and the computer graphics techniques

    第三章結合多通道諧波監測及故障錄波一體化裝置的研製這一課題，介紹了裝置的體系結構和硬體、軟體構成，詳細介紹了在裝置研究過程中所提出的關鍵技術，主要包括電流電壓信號高精度、高速采樣技術，快速傅立葉變換fft 、數據壓縮存儲技術，多線程技術，二維圖形擬合、三維圖形投影技術及海量存儲技術，計算機圖形技術等。
  9. It mainly includes following aspects : in this paper, firstly implication of wavelet analysis in signal harmonic component extraction is presented in detail, and on this foundation signal given frequency band component extraction method is proposed. then we investigate frequency aliasing phenomenon, reason why frequency aliasing phenomenon is easy happened when wavelet is implied in field of motor fault diagnosis, and frequency bands where frequency aliasing phenomenon is easer happened, and put forward approved morlet wavelet analysis method which can effectively alleviates frequency aliasing phenomenon. third we set up vibration signal detected system, design experiments to obtain three groups of fault signals : eccentricity fault, mixed fault of eccentricity plus mild rub, mixed fault of eccentricity plus moderate rub, and process these data using analysis method proposed in this paper

    首先對論文的選題以及相關背景進行了探討，並對相關的小波基礎理論進行了闡述，主要針對感應電動機的偏心故障和偏心+碰摩復合故障形式及相關的應用演算法進行了詳細探討，主要工作內容包括下面幾個方面:在論文中，首先對小波分析在信號的諧波分量提取中的應用進行了研究，在此基礎上，提出了信號的特定頻帶成分的提取方法;研究了小波分析的頻域混疊現象，探討了小波分析應用於電機故障診斷領域時易發生頻域混疊現象的原因，以及混疊現象較易發生的頻帶，提出了可以有效減輕頻域混疊現象的改進的morlet小波分析方法;搭建了振動信號檢測系統，設計實驗採集得到三組故障數據:偏心故障，偏心+輕微碰摩復合故障，偏心+中度碰摩復合故障，並對這些數據應用本文提出的分析方法進行信號處理，提取出的特徵參數可有效區分這兩種故障形式;研究了基於matlab和labview的混合編程方法，完成了電機故障檢測系統的軟體開發。
  10. Variable frequency speed regulation system based on the voltage space - vector is researched in this paper, the principle of the voltage space - vector is presented, and the third part " s software strategy of voltage space - vector is analyzed, the method of the third part " s software of voltage space - vector is imitated with simulink. at the same time, the duty time and duty order of the two zero - vector are analyzed and showed that the voltage space - vector pwm is actually a modulated method by adding the harmonic to the sine wave

    本文對基於空間電壓矢量的變頻調速系統進行了研究，敘述了空間電壓矢量的原理，對ti公司第三方軟體的對稱空間電壓矢量的演算法進行了分析，並用simulink對該方法進行了模擬，對兩個零矢量的作用時間和作用順序進行了分析，指出空間電壓矢量pwm實質上是一種諧波注入的調制方法。
  11. Based on the self - consistent nonlinear theory of complex cavity gyrotron with gradual transition, a simulation code of self - consistent nonlinear beam - wave interaction has been made, in which the multiple modes interaction with an electron beam and the mode coupling are taken into account. the interaction between the electron beam and hsn - h521 rf field for third - harmonic gyrotron is simulated. the influences of the thickness and the velocity spread and the velocity ratio of the electron beam and the fluctuation of the magnetic field and the technologic errors of complex cavity on the multi - modes interaction with an electron beam are analyzed

    二、在漸變復合腔迴旋管多模自洽非線性理論的基礎上，編制了高次諧波漸變復合腔迴旋管多模注?波互作用自洽非線性模擬軟體，並對8mm波段三次諧波漸變結構復合腔迴旋管的注? ?波互作用進行了大量的自洽非線性數值模擬計算與研究，進而分析了電子注的厚度、速度零散、速度比值、磁場波動、腔體尺寸的加工誤差等等多種因素對互作用效率的影響。
  12. ( 3 ) the frequency may transit from the second harmonic oscillating frequency to the third one when the hot temperature is higher than the specific temperature and the pressure is higher than the specific pressure

    在實驗中發現，在一定的加熱溫度和工作壓力下，系統的自激振蕩的頻率從第二諧振頻率跳變到第三諧振頻率。
  13. 3. based on the simulation, a 8mm third harmonic complex cavity gyrotron with gradual transition, to which a permanent magnet system could be used, is designed and tested

    三、在數值模擬研究的基礎上，設計了用於永磁包裝的8mm波段三次諧波漸變結構復合腔迴旋管互作用腔體及有關工作參量，並進行了測試。
  14. In the third chapter, we analyzed the second harmonic generation ( shg ) in theory just like the second chapter and get diffe rent results in different conditions

    在本文第三章，如同第二章討論，對倍頻（ shg ）調諧特性也作了理論計算分析，得到了在各種條件下的不同結果。
  15. We have carried out thoroughly theoretical investigation of the conversion efficiency and the field distribution of the second harmonic generation ( shg ) and the third harmonic generation ( thg ) on the flattened gaussian beam

    本文圍繞著河北省教委基金項目，對平頂高斯光束用於倍頻和混頻的轉換效率以及變頻后的諧波場分佈進行了理論研究。
  16. Computer simulation of a triode magnetron injection gun for 8mm third harmonic gyrotron

    三次諧波迴旋管雙陽極電子槍計算機模擬
  17. At home, in the later of 1970s, prof. liu shenggang began the research on electron cyclotron maser, and later, the group leaded by prof. li hongfu has done much research work on gyrotron also, and successfully developed a first ka band third harmonic gyrotron oscillator with a permanent magnet system. and later, they have began the research on a kind of gyrotron amplifier - gyroklystron

    在國內，中國電子科技大學在70年代後期，劉盛綱院士開辟了迴旋脈塞器件的研究方向，以後李宏福教授帶領下的課題組也對迴旋管進行了大量研究工作，並在「九?五」期間，成功地研製出了世界上第一支8mm三次諧波永磁包裝迴旋管。
  18. The method for third harmonic generation of large - aperture high - power solid laser is described which is the second nonlinear effect of two cascade crystals in this paper

    摘要敘述了大口徑高功率固體激光器，利用兩塊級聯晶體的二階非線性效應，對激光輸出進行諧波轉換，實現三次諧波輸出的方法。
  19. Brings out some new and different viewpoint on issues of transient and dynamic voltages for generator single phase fault as well as third harmonic fault protection.

    在暫態過電壓和三次諧波保護等問題上，提出了一些不同觀點。
  20. To ensure the beam quality reach the requirement of high efficiency third harmonic conversion and small focal spot size, the correction of wave - front aberration had to be considered in the design of high power solid - state laser facility

    在高功率固體激光系統總體設計中，為了使光束質量滿足高效率三倍頻和小孔進腔打靶的要求，必須對激光的波前畸變進行校正。
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