transition frequency 中文意思是什麼

transition frequency 解釋
過度頻率
  • transition : n 轉變，演變，變遷，變化；飛越；過渡期；【音樂】變調，轉調；【修辭學】語次轉變；【語法】轉換；【...
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  1. In light of market risk, there are sensitivity measurement method and volatility measurement method as well as the concepts about risk measurement, such as variance, duration, 3 - coefficient, 5 - coefficient and value at risk. and in light of credit risk, there are accounting - based ratio measurement method and volatility - based measurement method, as well as the related concepts, such as credit rating, z - score, transition matrix, expected default frequency

    其中，針對市場風險度量的方法包括靈敏度測量風險方法和波動性測量風險方法，與之相關的風險度量概念有方差、持續期、系數、類系數和在險價值；針對信用風險度量的方法包括基於財務比率的風險測量方法和基於波動性的風險測量方法，與之相關的風險度量概念有信用評級、 z分數、轉換矩陣、違約頻率。
  2. It is studied that the formation mechanism of taylor bubble and its control method in gas - liquid two - phase flow, which affects the pressure balance and mechanical driving efficiency in the flow of petroleum engineering. experiments show that the formation of taylor bubble in gas - liquid two - phase flow is due to the intensive congregation and amalgamation of small bubbles driven by void fraction waves and that the highly turbulent flow is able to restrain this formation. thus, the flow regime transition may be checked by increasing the flow turbulence and controlling the disturbed frequency

    對大管徑氣-液兩相流動中嚴重影響壓力平衡與機械驅動效率的段塞流生成機制和控制方法進行了研究，實驗證明段塞流的形成是由於空隙率波的大幅度增長使氣泡高度集中，並形成聚並所致。強湍流運動可以抑制taylor泡的形成。因此，通過強化湍流或控制擾動頻率可以對氣泡聚並起明顯的抑制作用。
  3. ( 2 ) the crack compares with one depth with the first steps and the second steps natural frequency vibration, crack position near crank arm and main shaft transition round natural frequency little place under crankshaft ; with the third steps and the fourth steps natural frequency vibration, the smaller close to the second crank arm of crankshaft and round place natural frequency of the main shaft transition the position is

    （ 2 ）裂紋同一深度比以第1階和第2階固有頻率振動，裂紋位置越靠近曲軸中間曲柄臂與主軸過渡圓處固有頻率越小；以第3階和第4階固有頻率振動，位置越靠近曲軸第二個曲柄臂與主軸過渡圓處固有頻率越小。
  4. On binary - ended forward converter with constant frequency zero voltage transition

    恆頻零電壓轉換雙端正激變換器研究
  5. Transitional feature of the arc and metal droplet in the welding process with steam shielded arc is investigated by means of analysing the waveforms of welding voltage and current under different welding regimes and it is found that there are two types of arc process behavor ? " arc starting - arc blowing out - short - circuiting " and " arc - starting - short - circuiting ". under the condition of constant diameter of welding wire and its feeding speed, the arc process behavor can be changed by adjusting the inductance of welding circuit as well as the voltage of power supply. if arc process behaves as alternative process of " arc starting - arc blowing out - short - circuiting " with minimum time duration of arc blowing out and maximum frequency of short - circuit transition, the welding process will be stable with less spatter and smooth weld bead

    通過分析不同焊接規范下的焊接電壓和電流的波形.研究了水蒸氣保護下電弧及熔滴過渡的特點，發現其電弧過程行為有「燃弧?熄弧?短路」和「燃弧?短路」兩種形式.在焊絲直徑和送絲速度一定的情況下，通過調節焊接迴路中的電感量和電源電壓，可以改變電弧的過程行為形式.若電弧過程呈「燃弧?熄弧?短路」交替進行，並且熄弧時間最短時，短路過渡頻率最高，在這種情況下，飛濺小，焊道成型好，焊接過程穩定
  6. Through the deep study of f. d. demello dynamic model of electromechanical transition and synchronous generator theory, we proposed a new control strategy of excitation device that can eliminate the negative - damping phenomenon, which is directly against the cause of producing negative - damping represented as low frequency oscillation in the system

    通過深入研究f . d . demello機電暫態的動力學模型以及同步發電機理論，針對系統產生負阻尼即低頻振蕩的原因，我們提出了一種新的可消除負阻尼現象的勵磁控制策略。
  7. In this paper, dynamic stability of parametrically excited flexible cam - follower system on the weakly nonlinear condition is investigated by using the combination of both the method of multiple scales and the technique of fourier series expansion. the equations of approximate transition curves in the plane of the dimensionless frequency and excitation ( amplitude ) parameter that separate stable from unstable solution are derived

    隨后，本文採用多尺度法並結合fourier級數展開，分析了不同的凸輪從動件運動規律和不同的凸輪的升程、停程以及回程的時間分配規律下，無間隙的周期時變凸輪系統模型的穩定性，獲得了各種規律下的凸輪系統的穩定區間圖。
  8. The main works and results we have accomplished are as follows : 1 ) red - detuned locking of cooling / trapping laser to the cycling transition of cesium cooling has been accomplished by means of a double - passed acoustic - optical frequency shifting system and the technique of saturated absorption spectroscopy. the short - term residual frequency jitter is less than 350khz ; 2 ) automatic controlling system by computer programs has been established for laser cooling and trapping and cavity qed experiment. the laser and magnetic fields can be controlled by the acoustic - optical modulator and the electronic - controlled logic gate respectively

    具體如下： 1 ）採用了往返兩次通過的聲光頻移系統結合飽和吸收光譜技術的實驗方案，實現了冷卻俘獲激光頻率相對于銫原子冷卻循環躍遷的負失諧鎖定，短期頻率穩定度約在350khz以內，並可方便地調節其負失諧量而無須對后續光路再作調整； 2 ）建立了一套基於計算機程序控制的、銫原子激光冷卻與俘獲實驗所需的時序控制系統。
  9. These rules are based on the extraction of all parasitic parameters of the layout and device modeling, including transition behavior, high frequency characteristics of the different materials, and electrostatic couplings to printed circuit board ( pcb ) conductors and to the ground

    這些規則是基於抽取pcb的敷線和器件模型的所有寄生參數而建立的，寄生參數的抽取考慮到了瞬態行為，不同材料的高頻特性， pcb不同導體和各導體對地間的靜電耦合。
  10. Calculated the aggregation frequency for the crown - shaped liquid droplets on condersor at > 90 in light of the properties of liquid droplets distribution function, and the detailed balance equation is derived for liquid - vapour phase transition

    摘要根據冷凝壁面液滴分佈函數的概念和性質，計算了> 90時冷凝壁面球冠形液滴的融並頻率；導出純氣液相變下冷凝壁面的細致平衡方程。
  11. With time - evolution - operator, it is proved that the population of upper level is in circumstance of cyclic oscillation by laser pulses pair of gaussian line - shape in a homogeneous broadening two - level system. the oscillatory time oxide is the delay time between the laser pulse pairs and the oscillatory frequency equals the one of transition between the lower and upper level

    引入時間演化算符，證明均勻增寬二能級體系在飛秒激光脈沖對作用下上能級激發態布居是周期性變化的，它以飛秒脈沖對之間的延時為時間軸，以該原子能級之間的躍遷頻率為振蕩頻率
  12. To solve these issues, a new idea i. e. co - frequency transmission technique is proposed. it can not only realize the smooth transition from 2g to 3g but also optimize spectrum efficiency and expand system capacity to accommodate more users in major metropolitan markets

    本文的同頻傳輸技術就是為了解決上述問題而提出來的一種全新的技術構想，它不僅可以實現由第二代系統向第三代系統的平滑過渡，而且可以更有效地利用現有的頻譜資源，解決現階段嚴重的頻率資源不足問題。
  13. Finally, a large number of experiments are done in this paper, such as the experiments of constant voltage and constant frequency, the current waveform of rotor, different carried - wave ratio, the transition smoothly and connecting electricity web etc. the theoretics and experiments results show that the design of control system is rational, terse and steady ; the analysis of control strategy and system experiments are successful basically

    最後，本文對系統進行了大量的試驗研究。其中主要包括：恆頻恆壓，轉子電流波形，不同載波比，同步速過渡及其並網試驗等。理論及其試驗結果表明：本控制系統的設計是合理、簡潔、穩定的；控制策略的分析和試驗基本上是成功的。
  14. This thesis deals with design and application of a multiprocessor made of four dsps in monitoring receiver. the broadband monitoring receiver requires a kind of chip with high performance because of complicated intermediate frequency signal processing. the author selects a kind of digital signal processor called adsp21160. during the process of design, the author uses cpld, fpga and some special cpus to finish signal, processing in the monitoring receiver. cluster multiprocessor based on vxibus made of four adsp21160 is put forward. the task distribution of four dsps is solved too. furthermore, data transition methods between chips at a high speed through link ports and chip extension mode using external port are recommended. the author debugs, emulates the program in one adsp - 21160 ez - kit lite and simulates the multiprocessor program in visualdsp + +

    本文主要探討了監測接收機中多dsp處理模塊的設計與應用，寬帶監測接收機的中頻處理數據量大、實時性高，這樣，對dsp晶元提出了很高的要求，作者通過比較選擇了最適用於監測接收機的數字信號處理器adsp21160 ，並結合使用了cpld 、 fpga以及一些專用的cpu來完成監測接收機中的數據處理。作者提出了由四片adsp21160組成的簇式多dsp處理模塊的結構並配以了vxi總線，論述了簇式結構的特點，解決了多dsp處理模塊中四片adsp21160的任務分配問題。
  15. It ' s most important performance is low insertion loss and facility of realization. utilizing ridge waveguide we have designed a waveguide - microstrip transition, in 32ghz ~ 37ghz frequency range, which have a loss less than 0. 2db

    在波導作為常用傳輸線的毫米波系統中，波導-微帶轉換結構是必不可少的部件，其關鍵性能指標是低損耗以及結構實現的容易性。
  16. The rigid and flexible trusses were simulated respectively. the dependences of the attitude angle degree and angle velocity of the spacecraft on the rigid and flexible situation in the deployment process and drive velocities loaded on the joints were derived. the frequency - amplitude characteristic curves were gained from the attitude angle velocity curves of the deployment of the flexible truss and locked flexible truss after deployment through the fast fourier transition ( fft ) method

    文中給出了展開前後的動力學固有特性;對展開過程中分別為剛性桁架和柔性桁架兩種情況進行了模擬計算，對比了兩種情況的桁架展開過程中衛星姿態角及姿態角速度的變化;比較了柔性桁架不同展開速度對衛星姿態角及姿態角速度的影響;分析了柔性桁架展開過程對衛星非展開方向的姿態角度及角速度的影響及原因;對柔性桁架展開過程中及展開鎖定后的衛星姿態角速度的變化曲線進行快速傅立葉變換，得到柔性桁架展開過程即展開鎖定后衛星姿態角速度的頻幅特性曲線。
  17. The atv - tvb supplementary response also emphasised that smooth transition should be the priority in formulating dtt policies and the seriousness of the problems of the proposed channels 35 and 37 and multiple frequency networks ( mfns )

    電視的補充回應強調在厘訂數碼地面電視政策時，順利過渡應為首要；以及指出選用第35及第37頻道和多頻網路數碼頻道（ mfns ）的問題的嚴重性。
  18. In this paper, we first investigate the impurity effect ( ba2 + ) on the dielectric and phase transition properties in srtio3 within the framework of the transverse - field ising model ( tim ). then a possible coupling mechanism between the magnetism and dielectric properties in eutio3 is discussed and the magnetic influence on the frequency of the soft - phonon mode is investigated via the heisenberg model, soft - mode theory under the mean field approximation, the second quantization theory and the perturbation theory. and we proceed further investigation on eu1 - xbaxtio3 of

    我們發現baxeul _ xtio3 （ o 『 x 『 0 . 2 ）的介電常數和由內察的偏置場導致的電極化除了隨雜質濃度產生相應的變化，同時在磁和介電性質的藕合作用影響下在低溫下偏離通常的量子順電體行為，在尼爾溫度附近出現異常，且磁場通過對最近鄰自旋關聯的作用來影響介電常數和電極化。
  19. We also show the relationships between the frequency of the external laser fields and the transition of the qubit in the two - qubit conditional geometric quantum phase - shift gate, explaining in detail how the transition of the qubit depends on the the external laser fields and the states of the controlling qubit. we also detail the theoretical ideas which explain how to control effectivly the two - qubit conditional geometric quantum phase - shift gates through external laser fields

    我們得到了外加激光場頻率跟兩量子位條件幾何量子相移門中的量子位躍遷之間的關系，詳細地說明了量子位的躍遷是怎樣依賴于外加激光場和控制量子位的狀態的，從理論上解釋了如何利用外加激光場有效的控制兩量子位條件幾何量子相移門。
  20. The response calculation of labyrinth gas seals with damping sleeve is done by the time - frequency transition method, which includes of the merits of harmonic balance method, dynamic softness method and tracking motion method

    採用一種將柔度系數法、諧波平衡法與求解摩擦力的數值跟蹤法相結合的時頻轉換方法，對帶阻尼套筒的蓖齒封嚴結構的響應進行計算。
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