自振蕩 的英文怎麼說

中文拼音 [zìzhèndàng]
自振蕩 英文
self oscillation
  • 自 : Ⅰ代詞（自己） self; oneself; one s own Ⅱ副詞（自然;當然） certainly; of course; naturally; willin...
  • 振 : 動詞1. （搖動; 揮動） shake; flap; wield 2. （奮起） brace up; rise with force and spirit
  • 蕩 : Ⅰ動詞1 （搖動; 擺動） swing; sway; wave 2 （無事走來走去; 閑逛） loaf; wander; roam; loiter; go a...
  1. Amplifier self-oscillates at a frequency depending on the velocity of the fluid.

    放大器自激振蕩的頻率就取決于流體的速度。
  2. A method to eliminate self - oscillation in testing hfe of low power uhf audion

    時自激振蕩的一種消除方法
  3. Self - modulation of intense relativistic annular electron beam in equipotential resonant cavity

    強流相對論環形電子束自調制振蕩研究
  4. But sometimes self - excited oscillations and noise may appear in hydraulic flapper - nozzle servo - valve if its construction is not selected very correctly. if self - excited oscillations and noise appear in hydraulic servo - valve, the performance of hydraulic control systems may lose stability

    因它具有非常快的響應速度，所以是目前應用最廣泛的伺服閥，但它也存在自激現象，容易產生自激噪聲和振蕩，嚴重影響伺服控制系統的穩定性。
  5. This dissertation is devoted to the investigation of the influence of self - excited oscillation jet on heat transfer enhancement

    本課題將helmholtz共振腔所產生的自激振蕩脈沖射流引入換熱器以實現強化換熱。
  6. The effect of joule heat and mineral matter on conductivity of coal

    偏轉特性對自激振蕩射流的影響
  7. Bias voltage, which are related to the superlattice structural paraments, the doped densities and the applied bias voltage. we have also investigated the characteristics of superlattice under hydrostatic pressure by simulations

    超晶格的負微分電導區還導致出現固定偏壓下隨時間變化的電流自維持振蕩，振蕩產生的條件依賴于其結構參數，摻雜濃度和外加偏壓的大小。
  8. One obtain a description of the vibrational modes in terms of self-consistent oscillations of the nuclear density and potential.

    藉助核密度和勢的自洽振蕩我們便得到振動模式的描述。
  9. 2. hi some of the neurons with spontaneous activities, veratridine can transform isi series to oscillation type

    在有自發放電的神經元，栗蘆堿可使部分神經元的isi序列轉變為振蕩形式。
  10. Self - oscillation can be generated under suitable configuration and waterpower parameters

    在合適的結構參數和水力參數，就可以產生自激振蕩。
  11. Aim to eliminate the influences of backlash nonlinear characteristics, a second generation adaptive pid controller based on single neuron is given. the result of simulation and the debug of actual digital servo system shows that the controller can effectively get rid of the sustained oscillation of the system caused by the backlash characteristics, and can improve the system accuracy

    隨后，採用改進型單神經元自適應pid控制器來消除間隙非線性對系統的影響，模擬結果表明所採用的方法能有效消除間隙特性引起的系統自振蕩，並且能夠提高系統的跟蹤精度。
  12. This machine uses reciprocating piston topour, sort caps out with electromagnetic shaking, pricks caps with blade. it not only can automatically finish the bottle - feeding, pouring, arranging caps, sending caps, pricking caps, but also not pout and arrange caps without bottle. it is a perfect equipment of little measure oral liquid pouring and cap - pricking

    本機採用往復式活塞泵進行灌裝，電磁振蕩理蓋，刀片軋蓋。能自動完成進瓶灌裝理蓋送蓋軋蓋工序，且無瓶不灌裝無瓶不理蓋。
  13. Section ii describes the design approach and implementation of speech module on mcf5249 coldfire core. the speech codec optimizes g. 729a codes and added voice activity detection of g. 729b to save bandwidth ; the implementation of acoustic echo cancellation uses nlms algorithm and it can reduce echo though designing adaptive fir filter and speech detector ; the dtmf and cpt generate signal using two second order digital sinusoidal oscillators and detect signal by picking up the frequency information. but only get the frequency information is not enough in cpt detector, this thesis introduces a method

    其中對語音編解碼器的設計採用優化g . 729a代碼達到設計要求，並在此基礎上加入g . 729b的靜音檢測模塊，以進一步降低網路傳輸帶寬;對回聲消除器的設計採用nlms演算法，通過設計自適應fir濾波器和語音檢測器達到回聲消除目的;對雙音多頻設計，信號發生端採用構造靜態參數表並通過二階正弦振蕩器產生信號，信號檢測端提取頻率信息以檢測信號;對呼叫進程音設計，除了類似雙音多頻的信號發生及頻率檢測設計外，還需要檢測信號持續時間，作者設計了一種基於匹配狀態表的方法以檢測信號持續時間。
  14. Conclusion a systematic method for preparation of enzyme - mannanse is established, a high productive strain was got after seducing and selecting from nature, confirmed as brachybacterium spa6 research were conducted on medium and culture method of the strain in order to get the suitable cultural condition of fermentation, the experiment result shows the optimium condition is ph7. 0, temperature 36c ; carbon content 2. 5 %, ventilation in abundence, agitation speed 200r / min

    結論1 、以從自然界中篩選出的菌株為出發株，經誘變、篩選，得一高產葡甘聚糖酶菌株，初步鑒定為短桿菌屬brachybacteriumspa6 2 、經誘變、三角瓶培養，該菌株的最適培養條件：培養基ph值7 . 0 ，碳源2 . 5 ，振蕩培養， 200r min ，培養溫度36 ，培養48h 。
  15. The expresson of phase balance among the degenerate amplifier of self - excitation and oscillator

    相位平衡條件在負反饋放大器的自激與振蕩器中的表述
  16. Abstract : we have studied the spontaneous emission from a three - level atom with an external - driving field in a photonic crystal. as a result of quantum interference and photon localization, the population in the two upper levels displays quasi - oscillatory oroscillatory behavior. this depends on the initial atomic state and the relative positions of the two upper levels from the forbidden gap. the intensity and the phase of the external field can affect spontaneous emission from the atom. the properties are different from a three - level atom either in vacuum or in aphotonic crystal without an external driving field

    文摘:討論了在雙光子驅動場作用下，三能級原子在光子晶體中的自發發射問題.由於量子干涉和光的局域化作用，兩個上能級中的占據數將具有周期振蕩或準周期振蕩的性質，這不僅依賴于兩個上能級與禁帶的相對位置，同時也依賴于原子的初始狀態，而且還與驅動場的強度、驅動場的入射位相有關.這些性質既與真空中帶有驅動場的原子的自發發射性質不同，也有別于無驅動場作用下光子晶體中三能級原子的自發發射性質
  17. According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d

    本文首先介紹了ld泵浦nd ： yag激光器的發展狀況、主要特性及其應用，從四能級速率方程出發，推導了ld泵浦nd ： yag激光器的閾值、輸出功率和斜效率的表達式，並簡述了激光器的工作原理、結構型式和倍頻方法；其次，以空間相關的速率方程為基礎，提出了ld端面泵浦nd ： yag激光器的設計方法，給出了一定泵浦耦合方式下，振蕩光模尺寸、最佳輸出耦合率、泵浦光模尺寸、泵浦光焦斑位置等參數的選取依據，以此為依據，設計了自聚焦透鏡耦合小功率ld泵浦nd ： yag激光器和透鏡組耦合高功率ld泵浦nd ： yag激光器，對激光器的輸出功率和功率穩定性等特性進行了實驗研究；再次，在帶尾纖輸出的高功率ld泵浦nd ： yag激光腔內插入一隻空液晶盒，觀察到了激光器以單縱模運轉；最後，根據泵浦光焦斑端面位置對激光輸出功率的影響規律，提出了ld端面泵浦nd ： yag激光位移傳感新方法，並進行了理論和實驗研究，研究結果表明：當激光晶體內泵浦光平均光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時，激光輸出功率的自然指數與泵浦光焦斑的縱向位置成高斯變化規律，測量范圍和靈敏度依賴于泵浦功率，隨著泵浦功率的增加，測量范圍擴大，靈敏度提高，當端面泵浦功率為7 . 24w （最大輸出功率為1 . 926w ）時，激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。
  18. Because the self - oscillation, the dynamic accuracy of the servo system is not only correlative with servo system parameters but also influenced by the input signal amplitude, frequency and the system self - oscillation state

    由於自振蕩狀態的存在，伺服系統的動態精度不僅與伺服系統的參數有關，還受到輸入信號幅值、頻率以及自振蕩頻率的影響。
  19. For the amplitude - frequency response at the self - oscillation frequency is one, a method to calculate the dynamic accuracy and the index of the servo system is provided, by comparing them, the scheme to design the verifying unit is presented

    利用伺服系統在自振蕩頻率點的幅頻特性為1這一特點，將輸入信號頻率、幅值、系統的自振蕩狀態和系統的參數聯系起來，構建了伺服系統動態精度的計算公式和指標估算經驗公式，並根據兩者的關系提出動態精度校正方案。
  20. The device has a built - in oscillator with the frequency that can be programmed using external resistor and capacitor, typically 40 ~ 50 khz

    該晶元具有自振蕩功能，振蕩頻率可以通過外部元件設定，典型振蕩頻率為40 50khz 。
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