無振蕩的 的英文怎麼說

中文拼音 [zhèndàngde]
無振蕩的 英文
deadbeat
  • : 無Ⅰ動詞(沒有) not have; there is not; be without Ⅱ名詞1 (沒有) nothing; nil 2 (姓氏) a surn...
  • : 動詞1. (搖動; 揮動) shake; flap; wield 2. (奮起) brace up; rise with force and spirit
  • : 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...
  • : 4次方是 The fourth power of 2 is direction
  1. The poem swung in majestic rhythm to the cool tumult of interstellar conflict, to the onset of starry hosts, to the impact of cold suns and the flaming up of nebular in the darkened void ; and through it all, unceasing and faint, like a silver shuttle, ran the frail, piping voice of man, a querulous chirp amid the screaming of planets and the crash of systems

    那詩以莊重節奏起伏,伴隨著星際沖突清冷波濤萬千星宿前進步伐和數冷冰冰太陽沖擊,伴隨著最黑暗空虛望星雲燃燒而在這一切之間,卻傳來了入類微弱細小聲音,有如一支銀梭,不斷地力地吶喊著,在星球呼嘯和天體撞擊聲中只不過是幾聲哀怨悲嗟唧唧啾鳴。
  2. In this paper, high - order accurate weighted essentially non - oscillatory ( weno ) schemes are investigated and their applications in hyperbolic conservation laws are discussed. based on this, a new weno difference scheme which based on dispersion - relation - preserving relation is developed, and representative test cases with this scheme for computational aeroacoustics ( caa ) problems has been implemented and compared in order to test capability of wave capturing ; in addition, weno schemes generally do not converge at high order in the presence of contact discontinuity of euler equations, so a conservative front tracking technique coupling weno schemes and level set method to simulate the translating density profile is presented here, and numerical simulation with this technique for representative test case has been implemented and results show the desired accuracy

    本文研究了高階精度加權基本( weno )格式及其在雙曲守恆律方程中應用,在此基礎上作了兩個方面工作:一是針對高頻聲波問題構造出一種基於保色散關系( drp )weno有限差分格式,並對計算氣動聲學( caa )問題代表性算例進行了大量數值實驗,比較了該格式捕捉波數能力;另外,針對高階weno格式在處理euler方程接觸間斷時精度有所降低問題,研究了利用界面追蹤技術levelset方法和高階激波捕捉weno格式相結合一種守恆追蹤方法,並且給出有代表性密度滑移面問題算例,得到一致高階精度數值模擬結果。
  3. In this paper, we develop the high - order accurate essentially non - oscillatory ( eno ) schemes on one and two - dimensional structured meshes in the finite volume formulation, and discuss their applications in hyperbolic conservation laws

    本文構造了一維、二維結構網格中高階精度基本( eno )有限體積格式,並且討論了它在雙曲守恆型方程中應用。
  4. 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自發發射問題.由於量子干涉和光局域化作用,兩個上能級中占據數將具有周期或準周期性質,這不僅依賴于兩個上能級與禁帶相對位置,同時也依賴于原子初始狀態,而且還與驅動場強度、驅動場入射位相有關.這些性質既與真空中帶有驅動場原子自發發射性質不同,也有別于驅動場作用下光子晶體中三能級原子自發發射性質
  5. These lashings, like the chords of a stringed instrument, resounded as if vibrated by a violin bow

    這些鋼索彷彿是樂器上弦,被一張弓拉著發出颼嗦響聲。
  6. The characteristics of damping shows that the uncompensated parallel ac transmission line can release the coupling between the hvdc and generator and improve the damping of the system, hence the possibility of subsynchronous oscillation decrease. in such a system scheme, the hvdc system dominates the changes of damping due to the small magnitude of the damping provided by ac line. when the ac transmission line is compensated with a fixed series capacitor, the situation will be totally different

    其中,並列運行串補交流輸電線路可以緩解hvdc與其臨近機組之間機電耦合程度,改善hvdc電氣負阻尼特性,從浙江大學博士學位論文摘要而減輕機組發生次同步危險性,此時系統整體電氣阻尼特性由hvdc性質決定;但若交流線路中存在串聯補償電容,則系統幅值較大電氣負阻尼不僅可能使整流站機組發生次同步,逆變站附近機組同樣存在發生次同步可能性,此時系統整體阻尼特性由串聯補償電容性質決定。
  7. The characteristics of precipitation anomalies in summer, previous and simultaneous ssta and preceding winter accumulated snow depth anomalies corresponding to positive and negative phases of 10 - yr mode and 25 - 30 - yr mode are discussed respectively. no matter for 10 - yr mode or for 25 - 30 - yr mode, reverse characteristics corresponding to positive phases and negative phases appear in the above fields. it proves that the decadal variation of sah have a good relation to the decadal variation of other key element of climate system and we can regard sah as a strong signal of the anomalies in the climate system

    ( 4 )夏季南亞高壓東西具有明顯年代際變化特徵,本文分別討論了對應於10年周期態正位相年和負位相年及25 - 30年周期態正位相年和負位相年時夏季我國降水距平、前期及同期海溫距平及前冬青藏高原積雪距平分佈特徵,發現論是10年周期態還是25 - 30年周期態,對于夏季南亞高壓東西正位相年和負位相年以上各要素場呈現為很好反位相特徵,說明夏季南亞高壓年代際變化與氣候系統中其他要素年代際變化具有很好關聯性,可將南亞高壓看作氣候系統中大氣子系統異常強信號,通過分析南亞高壓年代際異常可以更直接地研究和預測區域氣候異常。
  8. The damped solutions are very complicated. there are unoscillatory damped solutions and oscillatory damped solutions. the damped solutions are almost strongly damped, particularly in the degenerated situation

    而阻尼解一般都較復雜,即存在阻尼解,也存在阻尼解,阻尼解幾乎都是強阻尼
  9. In these regions, an expensive high - order accurate eno scheme is applied to evaluate the numerical flux at cell boundaries. and hi smooth regions a cheap spline interpolation is used to get the value of the numerical divergence from values previously obtained on lower resolution scales to save the computational cost

    在這些奇性區域,我們利用代價昂貴高階基本格式計算單元邊界數值通量;而在解光滑區域,則用廉價樣條插值根據先前低分辨尺度上得到值來計算出其數值散度,從而減少計算工作量。
  10. In chapter 3, we studied the effect of gaussian transverse profile for the driving and laser fields on lasing without population inversion ( lwi ) in a closed v - type system and an open v - type system. moreover, we discussed also the effect of the unsaturated gain coefficient, the cavity - damping rate, the ratio of the atomic injection rates and atomic exit rate on the corresponding systems. in chapter 4, we mainly discussed the effect of doppler broadening on the gain, dispersion and the frequency up - conversion of the open v - type lwi system and compared the differences and the same between the open system and the corresponding closed system

    發現: ( 1 )在考慮doppler展寬情況下,通過選取合適實驗室條件(比如合適原子環境溫度等)可得到合適doppler展寬值,從而使系統獲得最佳增益; ( 2 )要想實現系統頻率上轉換,同時又要獲得足夠強反轉激光增益,則系統頻率轉換比不能選取太大; ( 3 )對于開放系統,比較小粒子注入速率比與退出速率對產生反轉激光是有利碩士學位論文摘要: ( 4 )由於dopp1oy展寬存在,當探測場與驅動場傳播方向相反時,增益在探測場失諧某一段區域產生,且幅、頻率失諧范圍大小與dopper展寬取值有關。
  11. Eno schemes are based on the approximation theory, which achieve high - order spatial accuracy by reconstructing piecewise smooth high - order approximate polynomial from the cell - averaging values. during the reconstruction, adaptive stencil technology, which automatically chooses the relatively smoothest stencil from all possible stencils, is adopted to guarantee essentially non - oscillation near the discontinuity

    Eno格式基於近似理論,採用自適應基架技術(即自動選取所有基架中相對最為光滑基架) ,對網格平均值構造分段光滑高階多項式來獲得高階空間精度,同時保證格式在間斷附近具有基本性質。
  12. Next, the effects of the electron - beam quality on the characteristics of the vircator are investigated with simulation method. the simulation results show that the front edge of the beam pulse has almost no effect on the saturated microwave output, while good front edges can accelerate the saturation of the virtual cathode oscillation, and beam quality ( except its energy spread ) has almost no effect on microwave frequency, and so on

    結果表明:上凸形束脈沖前沿可使虛陰極器達到飽和時間縮短但對微波飽和功率基本影響;束流脈寬應足夠大,否則虛陰極器不能達到飽和(對應本文中模型,束脈寬應大於16ns ) ;能散度影響不可忽視,當能散度為5時,束波轉換效率從單能束時3 . 8降至1 . 5 ;束流質量(除能散度外)對微波頻率基本上沒有影響等。
  13. All the collapsed solutions are not oscillatory and the equal amplitude oscillatory solutions do not exit

    所有塌縮解都是解,不存在等幅解。
  14. 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

    而一致高階基本格式可以成功計算出雙曲型守恆律高精度數值解,在保持其間斷處陡峭、無振蕩的數值輪廓同時,並在光滑區域通常達到二階或三階精度,但其計算量卻相當大。
  15. So far, however, people mainly paid their attention to those functions of asvg, such as compensating reactive power or damping surge of power system

    在迄今為止應用和研究中,側重於考慮靜止功發生器補償系統功功率或阻尼系統功能。
  16. The dynamic simulating system used to do the research of governor control had been established by the device. the dynamic simulating tests of gahc used on steam turbine and hydro turbine had been done with the device. the tests were three phases short circuit, restoring synchronous operation and restraining low frequency oscillation in three - machines system

    利用該裝置對gahc在汽輪發電機和水輪發電機上控制進行了以下動模實驗:單機窮大系統中三相短路故障實驗和發電機發生失步故障后再同步實驗、三機窮大系統中抑制低頻動模實驗。
  17. Although light waves in the regime of classical optics can have electric fields as strong as those near bolts of lightning, these fields are not effective for accelerating particles on their own, because they oscillate transversely

    在古典光學中,雖然光波電場有可能大到如閃電雷擊程度,但因為電場是以橫向,所以法有效用來加速粒子。
  18. A second - order non - uniform grid essentially non - oscillatory difference scheme

    一個基於非均勻網格上二階基本差分格式
  19. An exponential transformation method for constructing high - order schemes of convection - diffusion equations on non - uniform difference grids

    構造了一個二階基本
  20. A semi - discrete form of our scheme is also presented. this new reconstruction is a third order accuracy in smooth regions and non - oscillations at cell interfaces. our scheme enjoys the main advantage of the central schemes - simplicity, namely it does not employ riemann solvers and hence the intricate and time - consuming characteristic decomposition are avoided

    本文針對一維雙曲型守恆律初值問題,研究了二階和三階中心差分格式,提出了一種改進三階中心差分格式及其半離散形式,主要是引入了一種新重構,並證明了這種重構在光滑區域具有三階精度且在網格邊界,所提格式保持了中心差分格式簡單優點,不需要求解黎曼問題,避免了復雜且耗時特徵分解過程。
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