頻率變換 的英文怎麼說

中文拼音 [bīnlǜbiànhuàn]
頻率變換 英文
channel rotation
  • 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...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 換 : 動詞1. （給人東西同時從他那裡取得別的東西） exchange; barter; trade 2. （變換; 更換） change 3. （兌換） exchange; cash
  • 頻率 : frequency; rate
  1. Commutator frequency changer

    整流子頻率變換器
  2. For more information about electric motors, frequency changer or slip ring motors please call the company woelf

    在生產商和服務商woelf出色的網頁上可以找到價廉物美的頻率變換器，電動機，集電環（繞線）型轉子電動機、繞線轉子異步電動機。
  3. The main works are as follows : 1. the paper systematically describes basic concepts and theories that form the foundation for design of general microwave filters. the topics will cover filter transfer function, lowpass prototype filters, frequency transformations, immittance inverters and the passband insertion loss under the influence of the dissipation of filter elements 2

    現總結如下: 1 .對微波濾波器的設計理論進行系統的分析，闡述了微波濾波器的傳輸函數、低通原型、頻率變換、倒置變換器以及元件損耗對帶內插損的影響等方面。
  4. At present, people usually use birefrigence and quasi - phase - matching methods to achieve higher effiency in the process of conversion. a significant advantage of quasi - phase - matching method is that the interaction is occurred through the largest element of the x ( 2 ) tensor ; the period of optical superlattice can be designed randomly, and any interaction can be matched without walk - off angle ; they are fitted to be used in frequency conversion of lower power especially. the quasi - phase - matching method has some advantages over birefrigence method, improving the efficiency of frequency conversion ; the range of frequency conversion covers its whole transperant wavelength

    由於準相位匹配技術有其獨特的優勢，可以利用非線性光學晶體的最大二階極化張量，如ppln 、 pplt 、 ppktp用的非線性極化張量都是d _ （ 33 ） ，其有效非線性系數高出普通非線性光學介質（如bbo 、 lbo 、 ktp ）一個數量級，而且可以人為靈活設計調制周期，通過周期設計其頻率變換范圍可以覆蓋準相位匹配介質的整個透明波段，選擇無走離效應，解決了常規pm難以解決的問題，拓寬了非線性晶體的應用范圍，極大地提高了頻率轉換效率，已成為非線性光學材料和固體激光器的研究熱點之一。
  5. So qpm enlarge the application range of the crystal in existence. presently diode pumped all - solid - state lasers have been developing quickly, which provides an ideal pump source for qpm. so lower power all - solid - state laser frequency conversion by qpm has been becoming a research focus

    近年來，隨著激光二極體（ ld ）技術的發展，小功率全固態激光器已經十分成熟，為準相位匹配提供了優質的泵源，因此，小功率全固態激光器的準相位匹配頻率變換成為目前的一個研究熱點。
  6. Frequency - conversion circuit

    頻率變換電路
  7. Quantum frequency conversion

    量子頻率變換
  8. Nonlinear - frequency - conversion is one of the best ways in widening wavelength of laser

    拓寬激光輸出波長范圍，最常用、最有效的方法之一是利用非線性晶體的頻率變換技術。
  9. In various high performance, wide dynamic range frequency convertings, phase noise is a main limiting factor

    在各種高性能、寬動態范圍的頻率變換中，相位噪聲是一個主要的限制因素。
  10. Another aspect of this paper is to expand the working band of hartmann - shack wavefront sensor through frequency transfer of nonlinear optics

    另一方面，我們又對利用非線性光學頻率變換方法拓寬探測器件的響應波段，做了探索性的工作。
  11. Utilizing quasi - phasematched ( qpm ) technique to achieve a given useful laser frequency conversion is a practical and challenging topic

    利用準相位匹配（ qpm ）技術在光學超晶格中實現特定的可實用化的激光頻率變換，在目前是一個富有實際意義和挑戰性的課題。
  12. Recently, with the development of good quality nonlinear frequency - conversion crystals and solid - state laser used as pump source, research activities in this area is heating up

    近年來，隨著高質量非線性頻率變換晶體和固體激光器抽運源的快速發展，這一領域的研究異常活躍。
  13. We all know that the output of ultraviolet ( uv ) laser mostly depends on the conversion of nonlinear frequency, thus a new kind of excellent nonlinear optics ( nlo ) crystal is very important for the output of new wavelength

    紫外波段激光的輸出主要採用頻率變換技術來實現，因此一種好的非線性光學晶體對于產生新的波長是非常重要的。
  14. In this thesis, the main contents are following : 1. reviewing the theory of nonlinear frequency conversion. quasi - phase - matching is discused. presenting the method for configuring periodically poled as well as multiple period superlattice

    闡述了非線性頻率變換的原理，討論了相位匹配和準相位匹配技術，著重說明了周期和準周期光學超晶格的工作原理。
  15. Indonesia : any of the regional radio republik indonesia stations, especially jambi in sumatra on 4925 khz, palangkaraya in borneo on 3325 khz, palu in sulawesi varying 3945 - 3960 khz

    印度尼西亞:一些印度尼西亞共和國電臺的區域廣播，特別是蘇門答臘的占碑用4925千赫的廣播，婆羅洲的帕朗卡拉亞用3325千赫的廣播，蘇拉威西的帕盧用3945到3960千赫的頻率變換廣播。
  16. Direct modulator converts baseband signal to rf signal without upconvertion. the system design is relatively simple compared to upconversion. so direct modulator provides adventages of compact size, low cost and low spurious response

    直接調制將基帶信號直接轉換為射頻信號，不需要二次頻率變換，與上變頻方式相比系統結構簡單，降低了對濾波器的要求，具有體積小，重量輕，成本低等明顯的優點。
  17. Liquid pumps - pump units with frequency inverters - guarantee and compatibility tests ; german version en 12483 : 1999

    液體泵.帶頻率變換器的泵組件.擔保和相容性試驗
  18. It shows that when walk - off and diffraction effects could be ignored approximately estimation of the phase distribution of second - harmonic wave could be done. the far field divergent angle and second moment radius of harmonic wave will vary with the aberration of fundamental wave, but the far field divergent angle will be obviously smaller than that of fundamental wave. the phase distribution of both fundamental and harmonic wave is measured using hartmann - shack wave front sensor in the experiment with 1064nm and 790nm lasers, respectively

    這說明利用非線性光學頻率變換方法拓寬波前傳感器件的響應波段是很難實現的，但是，通常三波相互作用過程的研究均是建立在平面波和理想高斯光束之上，因此我們對于位相畸變倍頻過程的研究是非線性光學領域一個重要而有意義的新課題，它有助於人們更加深入理解非線性光學效應，為進一步合理利用之奠定了理論和實驗的基礎。
  19. The three - phase high - frequency ac pulse density modulation ( pdm ) converter, which is proposed in this paper, can efficiently synthesize low - distortion variable frequency variable amplitude low frequency voltage signals from the fixed - frequency voltage of the high frequency link

    本文闡述的高頻交流脈沖密度調制（ pdm ）的控制策略能夠較容易地將高頻交流信號低失真地合成幅值和頻率變換的低頻信號。
  20. Introduction and analysis of methods of measuring the group delay of frequency - translating devices

    頻率變換器件群時延測量方法的探討與分析
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