excitation frequency 中文意思是什麼

excitation frequency 解釋
激動頻率
  • excitation : n. 1. 刺激，興奮，激發，鼓舞。2. 【物理學】激發；【電學】激勵、勵磁。3. 【植物；植物學】激感（現象）。
  • 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. Fourthly, according with the analyzing of flow measurement, we research the main problems needed to be solve in the process of measurement, such as analysis and measurement of the internal resistance, selection of excitation frequency, stable signal datum mark and restraining common mode interference, restraining for serial mode interference and working frequency interference ; transporting and shielding the flow signal, constant current excitation and magnetic field equalizing, flow measuring

    第四，根據對流量測量問題分析的，深入研究了設計過程中需要解決的主要問題。如內阻分析與測量;勵磁頻率的選擇;穩定信號基準點與抑制共模干擾;串模干擾與工頻干擾抑制;流量信號傳輸與屏蔽;恆流勵磁與磁場補償;流量測量點的選擇等。
  2. This controllable compound excitation is suitable for the small moveable power station driving by internal combustion engine, the land or marine generating sets for the industrial frequency power of moving force or lightening also can be used for power generator in other stage

    該相復勵發電機適用於由內燃機拖動組成移動電站、陸用發電機組、作為動力或照明的工頻電源，亦可用於其它場合作為電源發電機。
  3. Its principle is : a laminated structure ( beam or plate ) with delamination consists of undelaminated region and delaminted region which can be divided to upper and lower parts. when a low - amplitude and high - frequency excitation has the frequency close to some part ' s natural frequency, this part will resonate and certain amount of mechanical energy will convert to heat so that the delaminated region ' s temperature exceeds greatly that of the undelaminated region. therefore the delamination can be located by means of infrared thermograph

    其原理是具有脫層的層合材料構件（梁或板）包含脫層區域及未脫層區域，脫層區域分為上下兩部分，若對層合材料構件施加小振幅、高頻率的振動激勵，當激勵頻率恰好接近其中一部分的固有頻率時，該部分就會產生共振響應，部分機械能將轉化為熱能，使脫層區域的溫度遠高於未脫層區域，藉助紅外熱像儀即可顯示出脫層的位置。
  4. The matrix can be applied for the research of the vibrating frequency domain characteristics of the artillery system which is caused by the excitation of the plainness road surface. this method can also be applied to more complicated input spectrum of the wheel - system vehicles, and it has general signification

    該矩陣可用於研究火炮牽引列車系統受路面不平度激勵所產生振動的頻域特性，該方法可以推廣到更復雜的輪系車輛輸入譜的推導，具有一般意義。
  5. These data indicate that gabaergic inhibition makes an important contribution to the direction - dependent frequency tuning of most ic neurons. corticofugal modulation of the excitatory and inhibitory ftcs of most ic neurons was more pronounced at one sound direction than the other. sound direction effects on frequency tuning characteristics may undergo a postnatal development due to the development of excitation and inhibition integration

    通過對幼年（出生后第四周）和成年蝙蝠下丘聽神經元頻率調諧的方向敏感性的比較，發現幼年蝙蝠頻率調諧的方向敏感性比成年蝙蝠差，並認為可能是動物發育過程中，下丘的興奮性和抑制性輸入的整合也有一個發育的過程。
  6. Second, through employing the 3 - d finite element model and the dual objective function inversion method developed in this paper, and taking the measured fundamental frequency of system and the structure response to a harmonic excitation at the top of structure in field as the reversion objectives, the linear material parameter inversion is performed in ansys by using ansys parameter design language ( apdl )

    第二，採用三維實體有限元模型和本文提出的雙目標函數反演方法，把現場測試得到的系統基頻和頂部激振下實測的結構動力響應作為反演目標，利用ansys參數設計語言（ apdl ） ，在ansys軟體中實現了系統材料線性參數的反演。
  7. Based on vibration principle, the paper establishes dynamics analysis model of output shaft with elastic support, according to fourer series spread principle of periodic function, the dynamic response formula is derived by separating complex vibration force into sum of many simple harmonic excitation function of whole number times frequency relations. the result shows that response of both sides support is synchronous when load distribution non - uniform coefficient is 1

    依據振動理論建立了具有彈性支撐的輸出軸的動力學分析模型，根據周期函數的傅里葉級數展開原理，將復雜的激振力分解成為多個頻率成整倍數關系的簡諧激勵函數，導出了動態響應表達式，結果表明，當載荷分配不均勻系數為1 . 0時的輸出軸兩端支撐同步。
  8. In soft - photon approximation, the average excitation energy only appears in the first and second order terms of field frequency

    在軟光子近似下，平均激發能僅出現在光場頻率的一階和二階項上。
  9. Abstract : the paper presents the study on problems of self - excitation ， over - voltage ， frequency and voltage stability ， organizational measures and arrangement in the course of black start and restoration of the system. through simulation of black start on east china power system ， above problems are analyzed and solved ， it shows that working out strict black start scheme may not only speed up system restoration ， reduce outage losses ， but also have important significance to emergency release or power system islanding

    文摘:研究電力系統黑啟動的過程及恢復中存在的自勵磁、過電壓、頻率和電壓穩定、組織措施及安排等問題，並通過華東系統黑啟動模擬對上述問題進行分析和解決，證明制定嚴格的黑啟動計劃不僅可以迅速恢復系統、降低事故損失，而且對處理緊急狀態或地區性解裂有重要意義。
  10. 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。
  11. Based on mass - spring model, a method of automatic mode - selecting method is presented to solve the difficulties of selecting corresponding modes close to the excitation frequency, in adaptive perturbation for mistuned bladed disks

    摘要針對自適應攝動法在失諧葉盤受迫振動分析中，選擇接近激振力頻率的相應模態數目難于控制的問題，基於質量彈簧模型，提出一種自動選擇模態的方法。
  12. The stator of aceg is connected to the grid and the three symmetrical excitation windings in the rotor are fed by converter. the magnitude and frequency and phase and phase sequence of excitation voltage can be controlled, so the magnitude and position of excitation mmf as well as the speed of rotor can be controlled. therefore, acegs have superior performances by contrast with conventional synchronous generators and induction generators, such as upstanding stability, power generation of variable speed constant frequency ( vscf ), adjusting active power and reactive power independently, and absorbing lag reactive power deeply

    交流勵磁發電機的基本結構與繞線式異步電機相同，其定子側接電網，轉子上採用三相對稱分佈的勵磁繞組，由變頻器提供對稱交流電勵磁，且勵磁電壓的幅值大小、頻率、相位、相序都可根據要求加以控制，從而可以控制發電機勵磁磁場大小、相對于轉子的位置和電機的轉速，使得交流勵磁發電機具有良好的穩定性及轉速適應能力、獨立的有功與無功調節能力和較強的進相運行能力，性能超越傳統同步發電機和感應發電機，因而有著廣闊的應用前景。
  13. In the four parameters the frequency of excitation force is most significant to the horizontal and vertical velocity of seedlings. the amplitude of excitation force is less significant

    四個因子中，頻率對缽苗的推送速度影響最為顯著，其次是激振力幅值f 。
  14. 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。
  15. Fluorescence power transfer function, three - dimensional point spread function ( 3d - psf ) and three - dimensional optical transfer function ( sd - otf ) for the various fluorescent wavelength of the two kinds of fluorescence confocal scanning microscopy are calculated in this paper by using fourier imaging theory. the results show that the fluorescent wavelength has influence on imaging property of confocal microscopy such as spatial cut - off frequency, resolution and 3d - otf. there is a different missing - cone in the 3 - d space of otf when the ratio of excitation wavelength to fluorescent wavelength decreases

    本文在sheppard和gumin等人的理論基礎上，利用fourier光學成像理論，討論了不同熒光波長對單光子和雙光子共焦顯微鏡成像特性的影響，導出了單光子和雙光子共焦顯微鏡的熒光功率傳輸函數、三維脈沖響應函數和三維光學傳遞函數，得到了它們在不同激發波長與熒光波長比值時具體的表達式，並且通過數值計算，得到了它們的曲線圖，結果表明：隨著激發波長與熒光波長比值的增加，焦斑的橫向分佈和縱向分佈變窄，橫向解析度和縱向解析度提高，系統的成像效果變好，當激發波長與熒光波長的比值下降到一定程度時，可以看到不同程度的失錐現象。
  16. At last, in according to the experiment results, the interpretation of the mechanism of the slip phenomenon of prepressing - contact spring - damping system was given in this dissertation. further more, the relationship among the limit frequency, the value of prepressing, excitation frequency, the amplitude of excitation and the materiel parameter was analyzed. base on the theory analysis the limit frequency formula was given, and the contact - slip condition for engineering application was concluded

    最後根據理論研究與試驗分析的結果，分析預緊接觸式彈簧阻尼系統產生滑移現象的機理以及共振峰值漂移現象的理論解釋，並通過定性分析接觸分離時的頻率與預緊量、激勵頻率、激勵力幅值以及墊層的材料參數之間的關系，提出能定量描述系統出現滑移現象的極限頻率公式，總結了預緊接觸式結構始終保持接觸的條件。
  17. Based on the results of previous researchers, the following instigations have been carried out in this paper : ( 1 ) employing a reasonable local resonance model which can accurately embody the heat - generation behavior due to resonance and vibration - heat mode in delaminated region, the dynamic response and temperature distribution in the small delamination region of a laminated beam are formulated. influence of the excitation frequency on the temperature gradient formation is analyzed numerically, and several meaningful conclusions are drawn. ( 2 ) for laminated plates with delaminations, due to complexity of the analytical solution, the finite element method is employed to analyze their temperature distributions and satisfactory results are also obtained

    本文在前人研究的基礎上，對此方法進行了進一步的探討，主要做了以下的工作： （ 1 ）選取合理的、能夠準確反映由共振而產生熱量的行為的局部響應模型，以及合理的振動熱模式，推導了一維層合梁小脫層區域的振動響應及梁的溫度分佈，並編製程序計算了該層合梁在激勵一段時間后的溫度分佈趨勢，分析了激勵頻率對溫度梯度形成的影響，得到了一些有意義的結論； （ 2 ）對於二維層合板，由於解析解的形式異常復雜，本文採用有限元計算軟體對其溫度分佈進行了分析，也得到了較為滿意的結果。
  18. In this paper periodically perturbed hopf bifurcation to lienard equation with limited time delay is sdudied in detail. that is, the influence of small periodic perturbations on system exhibiting hopf bifurcation is sdudied. in particular, the excitation frequency and the critical natural frequency of hopf bifurcation in the cases of harmonic resonance. subharmonic resonance, ultraharmonic resonance, and ultrasubharmonic resonance is discussed. it is shown that in some parameter regions the sestyms exhibit harmonic solution bifurcation, subharmonic solution bifurcation, ultraharmonic solution bifurcation, ultrasubharmonic solution bifurcation and quasi - periodic solution

    本文詳細研究了具有限時滯li nard方程的周期擾動hopf分支，即在該系統經歷hopf分支時，研究小周期擾動對系統的影響，特別是討論了擾動頻率與hopf分支周期解的固有頻率在共振、次調和共振、超調和共振、超次調和共振的情形。
  19. Based on mechanical vibration theory, with the torque divider ' s structure unchanged, there exist two kinds of approach to reduce the resonance : one is keeping the bending vibration frequency away from the excitation frequency, the other is increasing the modal damp

    根據機械振動理論，在不改變分動器結構設計的條件下，採用兩種方法降低螺栓共振響應：一種是將彎曲模態頻率移出激勵頻帶；另一種是提高彎曲模態的阻尼比。
  20. Acording to the relationship between the natural frequency and the excitation frequency, those corresponding modes mostly close to the excitation frequency can be selected automatically

    該方法可根據激振力頻率與基系統固有頻率集的關系，自動選擇最接近激振力頻率的相應模態個數。
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