振蕩常數 的英文怎麼說
中文拼音 [zhèndàngchángshǔ]
振蕩常數
英文
oscillation constant-
Motion controller composed of general chip series is developed and quadruple differential circuit utilizing dual monostable multivibrators with schmitt trigger inputs and dual 4 _ line to l _ line data selectors or multiplexers is put forward
本論文研製了一種用常規晶元系列組成的運動控制器，提出了採用單穩態多諧振蕩器和數據選擇器的四倍頻辨向電路。In order to verify the accuracy, credence and effectiveness of the unstructured overset grid algorithm, steady and unsteady flow field of naca0012 airfoil are simulated. the unsteady flow field is caused by the oscillation of the airfoil. the two computational results are both compatible well with the experimental data
為了驗證非結構重疊網格方法的正確性、可靠性和有效性，本文對基於非結構重疊網格的naca0012翼型的定常流場以及簡諧振蕩的非定常流場進行了數值模擬，均取得了與實驗數據符合良好的結果。The mice showed also ageing - associated decline in oocyte quality, as indicated by increased frequency of premature chromatid separation, spindle disruption and / or chromosome misalignments in mii oocytes of aged mice. the gv oocytes from aged mice normally matured in vitro. the percentages of pronuclear - stage embryos, 2 - cell embryos and blastocyst derived from mii oocytes of aged mice by in vitro fertilization ( ivf ) were comparable with ones of young mice, but pronuclei formed 1 h later in aged mice than in young mice
老齡小鼠gv期卵母細胞能正常體外成熟；老齡小鼠m期卵母細胞經體外受精后形成原核期胚、 2 -細胞期胚和囊胚的比率與年輕小鼠比較無顯著差異，但原核形成時間延遲1小時；在老齡小鼠卵母細胞，注射牛精子抽提物或sr ~ （ 2 + ）處理時所誘發的ca ~ （ 2 + ）振蕩以及在減數分裂成熟及早期胚胎中的pkc分佈未發生改變。The numerical simulation of axisymmetric two - dimensional shock tube is studied, which has a conical convergent section, and its driving gas is the hot product of hydrogen oxygen detonation. finite volume tvd scheme is adopted and the mesh is local orthogonal. the primitive equations are euler s equations of multi - component flow. the new method of eliminating numerical oscillation at the interface of two materials is extended to two dimensions. the mechanical character of this shock tube is analyzed
對由前向爆轟產生驅動氣體並具有局部錐形收縮截面的軸對稱激波管利用兩相常比熱完全氣體的歐拉方程組和有限體積tvd格式在局部正交的網格上進行了二維數值模擬。將消除兩種介質界面處數值振蕩的新方法成功地推廣到二維情況。分析了該激波管的力學特性。The coupling from the pulse jet in the nozzle to the unsteady flow in the tube was discussed. and the relations between the parameters of gas charge and discharge, structure, working, flowing in tube and ideal cooling efficiency were established. the theory foundation of the influence of pulse jet on the flowing in the tube and characteristic would be built
探討了脈動射流與管內非定常流動的耦合問題，建立了脈動射流有關參數如進、排氣參數、結構參數、運行參數等和振蕩管內流動參數及理想製冷效率之間的普遍聯系，為研究脈動射流參數對振蕩管內流動及其性能的影響打下了理論基礎。Therefore it is considered that the spontaneous emission of atom is caused by the fluctuation of dipole moment, not by the dipole moment oscillation of the atomic system
原子偶極矩的期待值總是零，但偶極矩的起伏恆等於一個不為零的常數，因此，原子的自發輻射是由偶極矩的漲落引起的，並非原子偶極矩振蕩造成的結果。Finally, the rules used to design the induction motor and set the inverter v / f curve are summarized to improve the stability of the system movement in the forth part of the dissertation, three measures are brought forward to eliminate the system low frequency oscillation. the first measure adopts pulse based dead time compensation to suppress the oscillation. as second measure, considering the motor and inverter as an integration, the discontinuous space vector modulated strategy named dpwm3 is proposed for the first time to suppress the oscillation
措施一是在總結常用死區補償方法的基礎上，提出脈沖為基礎的死區時間補償法（ pbdtc ）對死沈陽工業大學博士學位論文區進行補償，抑制系統的低頻振蕩;措施二是從逆變器與電機的機電一體化配合更加完善的角度，首次提出採用不連續空間矢量調制策略dpwm抑制系統的低頻振蕩;措施三是通過對系統中電機參數的調節，達到抑制系統低頻振蕩的目的;最後進行了實驗驗證。Uniformly high - order accurate eno ( essentially non - oscillatory ) schemes succeed in computing highly accurate numerical solutions to hyperbolic systems of conservation laws, typically second or three order in smooth regions, while maintaining sharp, oscillation free, numerical profiles at discontinuities, but usually their computational cost is quite large
而一致高階基本無振蕩格式可以成功計算出雙曲型守恆律的高精度數值解，在保持其間斷處陡峭、無振蕩的數值輪廓的同時，並在光滑區域通常達到二階或三階精度，但其計算量卻相當的大。If we apply the same input to an unstable system, the output will never settle down to a steady - state phase ; it will increase in an unbounded manner, usually exponentially or with oscillation of increasing amplitude
如果我們將同樣的輸入作用於不穩定的系統，其輸出將不會回到穩態，而是以無界的方式增長，通常其幅值是指數增長或者振蕩增長。It can been predicted by morlet wavelet transform that the 10 years after 2000 would appear an increasing rainfall trend in summer in northwest china. ( 5 ) the drought and flood have obviously interannual oscillatory variabilities. the climate is moist from 1980 ' s to early 1990 ' s. it ' s the extremely dry period in the 40 years when the rainfall is plentiful while drought happened now and then after 1995
（ 5 ）西北地區夏季旱澇異常區區域旱澇指數的時間演變特徵表明：青藏高原東北側和渭水流域的夏季旱澇以20a與8a的年代際變化為主，北疆主要存在8 9a的周期振蕩，河西走廊即有15a周期振蕩，又有8 10a的周期振蕩。The oocytes reconstructed by gv exchange between young and young or young and aged mice showed normal bovine sperm extract or sr2 + - induced ca2 + oscillations in mii stage and normal pkc a distribution in mii oocytes and early embryos. normal meiosis appeared in the oocytes reconstructed by gv exchange between young and young mice
在年輕小鼠卵母細胞之間以及年輕小鼠與老齡小鼠卵母細胞之間gv互換后的重組卵母細胞表現出正常的牛精子抽提物或sr ~ （ 2 + ）誘發的ca ~ （ 2 + ）振蕩，以及在減數分裂成熟和早期胚胎中表現出正常的pkc分佈。The main numerical method of this code is coming from scheme ( jameson, schimit and turkel ) : using cell - centered finite volume method as spatial discretization tools, and a system of ordinary differential equations for time variable is obtained, which is solved by utilizing five - step runge - kutta scheme as time marching method, introducing artificial dissipation to damp high frequency oscillations near the shock and stagnation point
本論文採用歐拉方程作為控制方程，利用中心有限體積法進行空間離散，得到對時間變量的常微分方程組，採用龍格庫塔多步法進行時間積分，加入人工粘性以消除激波和駐點附近的壓力振蕩等方法來對naca0012翼型的實際流動進行并行數值模擬。For an ev drive system, the variation of rotor time constant will bring on variation of torque and exorbitant line voltage even the field orientation may be destroyed. the varied torque will affect ev dynamic performance, and the higher voltage will limit the output power due to the bound of batteries in ev
對于電動汽車驅動系統來說，轉子時間常數的波動會導致輸出轉矩和電機電壓的波動，並且嚴重時會導致系統出現振蕩，轉矩的波動會影響汽車的動態性能，電機電壓的波動則會由於電池電壓的限制而影響電機的輸出功率，這些都是電動汽車的驅動系統應該避免的問題。You can make a very simple oscillator with one diac, cap and a resistor
你可以用一個交流數據輸入儀，電容和一個電阻做個非常簡單的振蕩器。6. the theoretics of flip - flop anomalous property is perfected, and the oscillatory state of flip - flop is analyzed and the oscillatory frequency calculating equator is provided ; the self - adapting data synchronizer practical circuit with 0 error rate is designed, which can be used to resolve the problem of data synchronizing. the data synchronizer in common use is realized
6 、對觸發器的不確定性理論作了改進，討論了觸發器的非穩態過程，給出了一些計算觸發器振蕩頻率的公式，設計了自適應數據同步器實現電路，理論誤碼率為0 ，為解決數據同步問題提供了新思路，實現了常用數據同步器。How to define the parameters of the generator to eliminate the oscillation is a very important project
如何合理選取電機的參數、避免振蕩現象的出現是一個非常重要的課題。As for the nonlinear problem, the predictor - corrector algorithm, which possess 2nd precision of numerical results, is presented. the application of adaptive pti method is also given
數值算例表明，精細積分方法有效池避兔了常規方法的數值振蕩現象，具有較高的計算精度，對于非線性熱傳導問題也民有良好的精度。It was observed from the inverse kinematics simulation results that the position, accelerate and velocity minimum - norm solution of joint 1, 3, 7 of the manipulator were controllable with no abnormal fluctuates, which satisfy the motion requirements. however, the position, the accelerate and the velocity of joint 2, 4, 5, 6 of the manipulator varied with time irregularly with high efficiency during the simulation time t = 4. 7197s ~ 5s, which would make the joint uncontrollable and result in the vibration of the manipulator system, hence the kinematic performance of manipulator should be improved
逆運動學模擬結果表明，關節1 、 3 、 7速度最小范數解、位置與加速度均滿足運動要求，無異常波動現象，能夠實現控制；而關節2 、 4 、 5 、 6速度在模擬時間t = [ 4 . 7197s ， 5s ]時速度、位置和加速度出現異常振蕩，關節運動失控，從而引起系統振動，其運動性能需進一步改進。分享友人