first harmonic wave 中文意思是什麼

first harmonic wave 解釋
或稱一次諧波
  • first : adj 1 最初的，最早的。2 最上等的，第一流的。3 基本的，概要的。4 高音（調）的。n 1 最初，第一；第...
  • 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...
  • wave : n 〈美海軍〉女志願軍人〈見 WAVES 條〉。n 1 波浪；碎浪； 〈the wave（s）〉 〈詩〉海。2 波動；波狀...
  1. Mixers are the key components of many microwave and millimeter - wave systems. the super - heterodyne receiver is always applied in modern communication system, mixer becomes the key component as is at the first part of system. but it is more and more difficult to get the choiceness lo source of the same band with the system is working at high frequency especially in the millimeter - wave. sub - harmonic mixer is a good solution to this problem now. in this circuit we need just half 、 quarter 、 even 1 / 8 of the rf signal frequency. in this paper the design and fabricate of sub - harmonic hmic mixers ( 2, 4 ) at w - band are introduced

    混頻器是微波通信、射電天文學、雷達、等離子物理、遙控、遙感、電子對抗，以及許多微波測量系統中至關重要的部件。在現代通信系統中，毫米波頻段通常採用超外差接收機，混頻器作為第一級就成為關鍵部件。由於在毫米波頻段，同頻段高性能的本振源成本高，技術難度大，採用分諧波混頻技術是解決此問題的有效途徑，只需射頻頻率1 / 2 、 1 / 4甚至1 / 8的本振頻率即可實現混頻。
  2. Observed tidal harmonic constants in many stations are used to verify the astronomical tides in the compound fluid model. the wave model is tested by a set of wave flume data at first. then the results are compared by the actual processes of significant wave height in gauging stations

    其中復合流場模型中的天文潮利用眾多測站的實測調和常數進行驗證；波浪模型首先進行了水槽實驗的檢驗，然後在臺風過程中，進行了測站有效波高過程線的比較。
  3. At first, the character of millimeter wave and frequency multipliers in millimeter wave band is introduced. based on the principle of harmonic frequency extraction in nonlinear device, we present the avalanche diode high order frequency multipliers in w band

    利用雪崩效應中強烈的非線性電感特性，基於非線性器件諧波提取的思想，對倍頻器電路進行了優化模擬，採用雪崩倍頻二極體研製了w波段雪崩高次倍頻器。
  4. First, we concisely recall the formation and development of bose - einstein condensa - tion ' s theory and it ' s experimentation. secondly, we briefly intro - duce some properties of weakly interactive bose gases, and derive the nonlinear gross - pitaevskii equation that is the condensate macroscopic wave function ' s equation. thirdly, we give a exam - pie, an approximation analytical solution of the gross - pitaevskii equation in a spherical symmetric harmonic trap is derived by a perturbation theory approach, this solution is consistent with that numerically obtained

    全文共分為四章：第一章首先簡要的介紹和回顧了玻色-愛因斯坦凝聚理論的產生和發展，以及其實驗研究的過程，然後著重介紹了弱相互作用的玻色氣體的一些性質，並推導出了凝聚體宏觀波函數滿足非線性的gp方程，還以球對稱的諧振子勢為例，用標準的微擾方法求出了定態的gp方程近似解，發現其與已知的數值結果符合得很好。
  5. Choose the proper sample and compare by two means. first is to compare actual value to the calculated, and second is analysis of the effect on harmonic wave. take fast fourier transform algorithm to the samples fore - and - aft integral, and compare the amplitude and angle

    首先是直接比較實際值與還原值，其次是分析各種演算法對諧波的影響：分別對積分前後的采樣值進行快速傅立葉變換，比較各次諧波幅值和相位的變化。
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