field fluctuation 中文意思是什麼

field fluctuation 解釋
磁通波動
  • field : n 菲爾德〈姓氏〉。n 1 原野，曠野；（海、空、冰雪等的）茫茫一片。2 田地，牧場；割草場；〈pl 〉〈集...
  • fluctuation : n. 1. 波動，起伏，漲落；【物理學】脈動。2. 動搖不定，躊躇。3. 【生物學】彷徨變異。
  1. At the same time, on the basis of above results, the stability problem of the polarization of particle self - spin is discussed in irregular magnetic field of accelerator. the discovery that the low degree polarization system is very sensitive to the irregular magnetic field while the high degree polarization system is very stable is found. the irregular fluctuation of the vertical ponderance is complementary to that of the horizontal ponderance due to the self - spin conservation

    同時，在此基礎上，利用su （ 2 ）代數動力學方程研究了加速器中帶自旋離子的極化對磁場的含時無規擾動的穩定性問題，發現：低度極化的系統對磁場無規擾動十分敏感，而高度極化的系統對磁場無規擾動十分穩定；自旋守恆導致自旋的縱向分量的無規漲落和橫向分量的無規漲落存在著互補性。
  2. Fluctuation of yield on high - yield field and desiccation of the soil on dryland

    旱作高產田產量波動性和土壤乾燥化
  3. Finally, coupled chaotic system is realized to measure the fluctuation of magnetic field. meanwhile, it is proved that coupled chaotic system could be used to reduce noise. this experiment also finds an efficient approach for noise reduction in chaotic measurement

    最後把耦合混沌測量系統用於磁場測量中，實現用多個混沌電路耦合的系統測量微弱的磁場變化，證實了耦合混沌系統有較好的抗干擾能力的結論，為混沌測量的抗干擾措施找到了一條比較有效的途徑。
  4. The first aspect is about the distribution function for fermions in quasi - equilibrium qgp which is perturbed by the fluctuation of the color field. neglecting the affect of the spin and the collision between the particles in qgp, the distribution function for fermions in quasi - equilibrium qgp has been obtained. further more, the physical " basses that decide the departure factor are analyzed

    第一，從qgp動力論出發，忽略自旋和碰撞效應，得到qgp在色場漲落擾動下偏離平衡態而處于近平衡時的分佈函數的二級近似以及偏離因子的物理表示，進而分析了決定偏離因子的物理因素。
  5. This study deals with butterfly diversity and assessing endangered species in natural reserve of baishuijiang in gansu province. the research includes field investigation, observation at certain time and places, captive breeding in experimental area, capture - recapture etc. the biology of four important butterfly species is studied, especially focusing on the natural population life table, habitats, population structure and mobility of byasa impediens. the population developing trend and key factor that result population decline and fluctuation of troides aeacus and byasa impediens are analysed

    本文在甘肅白水江自然保護區碧峰溝通過野外調查、定點定時觀察、實驗地飼養、標記重捕等方法研究了碧峰溝的蝶類多樣性並進行了局部瀕危評估；研究了四種重要蝶類的生物學特性；對長尾麝鳳蝶的生境、自然種群生命表、種群結構、種群移動性進行了深入研究，並估測了各種種群參數，分析了種群發展趨勢。
  6. The research result demonstrates that along with the increment of reynolds number, the root mean square value of outer fluctuating magnitude of the external diameter in fall frequency band increases, the root mean square value of fluctuating magnitude of the external diameter in high frequency band decreses, demonstrating that the fluctuation of flexible pipe wall changes fluctuation don field of original rigid pipe, large - size eddy motion increases and small - size eddy motion decreases, this reduces energy loss and increases friction reduction effectiveness

    研究結果表明：隨著雷諾數的增加，全頻帶的外徑脈動的均方根值加大，但高頻帶外徑脈動的均方根值減小，說明柔性管管壁脈動確實改變了原剛性管的脈動流場，大尺度渦的運動加劇，低尺度渦運動減弱，從而使得能量損失減少，減阻效果增大。
  7. The fluctuation of ion beam has been controlled within 20 %, significantly lower than that of 50 - 80 % for external - magnetic field mid of annular configuration and ion diode without magnetic field by using polymer anodes

    離子束密度的波動不超過20 ，顯著低於同類陽極的無磁絕緣和環型結構外磁絕緣離子二極體的50 - 80 。
  8. In chapter 2, we analyzed the effect of the driving field phase fluctuation on the gain and dispersion and population differences in an open v - type three - level non - inversion lasing system and then discussed the effects of the incoherent pumping rate, the ratio of the atomic injection rates, the atomic exit rate, the rabi frequency of the probe and driving fields and their corresponding detuning on the gain, dispersion and population differences of the system, and got some important conclusions different from those in closed or other open systems

    第二章討論了驅動場的相位漲落對開放的v型三能級無反轉激光系統的影響，根據解析解的數值計算結果討論了非相干泵浦速率、粒子注入速率之比、粒子退出速率、探測場和驅動場的rabi頻率和相應失諧對系統增益、色散和粒子數差的影響，得到了一些不同於封閉的v型系統及其他開放的無反轉激光系統的重要結論。
  9. Artificial periodic disturbances are introduced to the outer field of turbulent boundary layer in an closed - circuit open water channel. statistical method is employed for analyzing the velocity - fluctuation - time - series. the effect of the disturbance to turbulent structure in boundary layer is studied

    在開口式循環水槽底部湍流邊界層外區中引入周期性擾動，對湍流場的速度脈動時間序列信號進行了統計分析，研究了湍流邊界層中周期性人工擾動對湍流結構的影響，結果表明高頻擾動的湍流中she - leveque簡稱sl湍流層次相似律成立。
  10. The numerical results show that the flow - field structures and main features of the compressible mixing layer including the distribution of mean velocity, turbulent fluctuation intensities, reynolds stress and growth rates agree well with experimental and other numerical results

    計算出的流場結構和主要的流動特徵包括平均速度、湍流脈動強度和雷諾應力的分佈以及混合層擴張率都同實驗測量和其他時間發展數值模擬結果符合得很好。
  11. By magnetoelectric coupling, the application of an electric field or ferroelectric polarization can change one or more of the parameters governing the ma gnetic behavior of the system. correspondingly, being possible magnetostrictive effect or electron - phonon interaction, the fluctuation of spin ordering may lead to a dielectric anomaly and ferroelectric relaxation

    通過磁電耦合，鐵電有序或外電場可導致自旋的再分佈而改變系統的磁性性質，同樣由於自旋有序的漲落通過磁致伸縮或可能的電-聲子作用可導致鐵電弛豫或介電異常。
  12. Methods by utilizing the principle of superposing states in quantum mechanics and the general theory of multimode squeezing states, the quantum fluctuation of the general both electronic and magnetic field component were figured

    方法根據量子力學中的態疊加原理並利用多模壓縮態理論，推出廣義電場和廣義磁場分量的量子漲落情況。
  13. Under a certain magnetic field, the density and stability of anode plasma determines the ion current density and its fluctuation

    在確定磁場強度下，陽極等離子體密度和穩定性決定了引出離子束流密度的大小及其波動幅度。
  14. Based on the self - consistent nonlinear theory of complex cavity gyrotron with gradual transition, a simulation code of self - consistent nonlinear beam - wave interaction has been made, in which the multiple modes interaction with an electron beam and the mode coupling are taken into account. the interaction between the electron beam and hsn - h521 rf field for third - harmonic gyrotron is simulated. the influences of the thickness and the velocity spread and the velocity ratio of the electron beam and the fluctuation of the magnetic field and the technologic errors of complex cavity on the multi - modes interaction with an electron beam are analyzed

    二、在漸變復合腔迴旋管多模自洽非線性理論的基礎上，編制了高次諧波漸變復合腔迴旋管多模注?波互作用自洽非線性模擬軟體，並對8mm波段三次諧波漸變結構復合腔迴旋管的注? ?波互作用進行了大量的自洽非線性數值模擬計算與研究，進而分析了電子注的厚度、速度零散、速度比值、磁場波動、腔體尺寸的加工誤差等等多種因素對互作用效率的影響。
  15. The second aspect : from qgp kinetic equations with collision integrals, by using the relaxation time approximation, we calculate the distribution functions to the second order correction. we obtain the distribution functions for quarks ( and anti - quarks ) and gluons under perturbation of the fluctuation of the color field. then in the high - temperature - low - density area, we discuss the characteristics of the distribution functions, and use t hem to get the net baryon density and the energy density

    第二，從有碰撞項的qgp動力論方程出發，忽略自旋，在色漲落擾動下，利用弛豫時間近似，得到夸克和膠子分佈函數的二級修正，通過數值分析重點討論了高溫低密情況下qgp中成分粒子分佈函數的特性，並且由分佈函數得到凈重子數密度和能量密度。
  16. We put our emphases on four sections : the opening of the energy gap and its effects on the thermodynamic properties in low temperature, quantum fluctuation and the hidden long - distance order parameters, the magnetization and the specific heat properties under the extern magnetic field of the ferromagnetic chain, and the energy spectrum of the ferromagnetic ladder

    著重研究在一維量子自旋系統中的能隙的打開、以及能隙對系統熱力學性質的影響；量子漲落和系統隱含的序參量；亞鐵磁的在外場下的磁化性質以及比熱性質；和亞鐵磁雙鏈系統中的能譜。
  17. This paper takes the exchange rate fluctuation in the international finance as the main object of study, introducing and appraising various theories of the exchange rate determination, which have theoretical influence and practical significance heretofore in the field of international finance firstly. these theories include traditional exchange rate determination theories and modern monetarist models

    本文視匯率波動問題為研究主題，在簡要評述主要匯率決定理論基礎上，不僅分析了以購買力平價理論、利率平價理論為代表的傳統匯率決定理論，而且討論了以粘性價格模型、靈活價格貨幣模型、實際利差貨幣模型等現代匯率決定模型。
  18. In addition, this paper has analyzed and calculated the wave - guide mode theory, got the quantum well laser photic - field distribution ' s fluctuation equation, deduced the far - field distribution ' s mathematics model by the method of stepwise approached, and simulated the near - field and far - field about the laser with computer software. we utilized a pair of mode expand layers which can restricted in photic - field to narrowed the far - field comer about quantum well laser material structure ( the corner was about 21 ?

    另外本文還對光波導模式理論進行了理論分析和計算，得到了量子阱激光器光場分佈的波動方程，利用逐步逼近的方法推導出了遠場分佈的數值模型，通過計算機軟體模擬出了激光器遠近場分布圖，並利用模式擴展層對光場的限製作用得到了窄遠場發散角（約為21 ）的量子阱激光器材料結構。
  19. Based on the work of the former people, in this paper, we mainly studied the effect of the driving field phase fluctuation, the effect of gaussian transverse profile of the driving and laser fields, the doppler effect and so on for the open v - type lwi system

    本文在前人工作的基礎上主要討論了開放的v型三能級系統中驅動場的相位漲落、驅動場與激光場的橫向效應以及doppler展寬對產生無反轉激光的影響，並討論了系統其他各種參數的作用。
  20. The analytical solutions of the gain, dispersion and population difference in the steady state of an open ladder lasing without inversion ( lwi ) system are at first given when the phase fluctuation of the driving field is considered. then the effects of the driving field phase fluctuation on the gain, dispersion and population difference are analyzed by the numerical results from the analytical solutions. our research shows that the phase fluctuation of the driving field will results in a finite line width ; with the line width increasing, the gain decreases monotonously, however, variation of the dispersion isn ? t monotonous, it has a maximum value when the line width takes some value ; the line width varying can ? t lead to change lasing from without to with population inversion

    給出了有驅動場位相漲落的開放的梯型無粒子數反轉激光（ lwi ）系統增益、色散和布居數差的定態解析解，進而用得到的數值計算結果分析了驅動場位相漲落對增益、色散和布居數差的影響.研究結果表明，驅動場位相漲落將導致有限線寬;隨著線寬的增加，系統增益單調地減小，但系統色散的變化並不是單調的，當線寬取某個值時，色散有極大值;線寬的變化不能導致無反轉激光向反轉激光的轉變
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