dimensional instability 中文意思是什麼

dimensional instability 解釋
尺寸不穩定性
  • dimensional : adj. 1. 尺寸的。2. 空間的。3. 【數學】因次的；…次（元）的。
  • instability : n. 動搖性，不穩定性；不堅決，反復無常，三心二意。 the instability of human affairs 人事滄桑。
  1. A new model was presented in a three dimensional geographic coodinate system to describe the linear growth of r - t instability so that the effects of magnetic inclination and declination were taken into accont. it is an generalization of former theories from equatorial to mid - latitude regions. from this model one can see the influence of magnetic strength, inclination and declination. due to the magnetic effects, the occurrence rate of the instability is not symmetric in longitudes even at the magnetic equator. some occurrence peaks or valleys will appear in certain places around the world

    從三維地理坐標系出發建立模型，考慮了地磁傾角和偏角的影響，研究spread - f現象的全球分佈特點，是對以前的研究從赤道地區向中低緯度地區的推廣。從該三維模型中可以看到地磁場的大小和位型的影響包括磁傾角和磁偏角的效應。由於地磁位型的不同，發生率的分佈並不具有經度對稱性，即使在磁赤道附近也如此。
  2. The transport of reb is examined by 2d3v particle simulation in the xy plane. the filamentation and coalescence of currents and related magnetic field pattern, caused by the two - dimensional electromagnetic - beam - plasma ( embp ) instability, are observed

    在xy平面上對電流輸運過程進行了2d3v粒子模擬，觀察到電流絲的形成、聚合和磁場產生。
  3. Secondly, nonlinear threshold of two - dimensional rt instability was analyzed in planar and cylindrical and spherical geometries. density amplitude was defined relating to instable interface and formulae of nonlinear threshold values for rt instability in three geometries were given, then the lared - s code was used to simulate two - dimensional rt instability in three geometries and simulation results agreed well with the formulae

    其次，討論了二維平面、柱和球幾何中rt不穩定性發生非線性偏離的閾值問題，給出了三種幾何中密度擾動振幅的非線性閉值公式，並且用lared一s程序進行了檢驗，計算結果表明柱和球幾何中的模藕合機制與平面幾何不同，存在幾何效應的影響。
  4. Furthermore, we employ iteration and predictor - corrector - approach to solve the nonlinear equations in order to implement the marching procedure. we investigate detailedly the process of the c - type instability for nonparallel boundary layers with three - dimensional disturbances. by investigating the nonparallel boundary layers of three - dimensional body, we

    文中通過對三維物體的非平行邊界層穩定性的研究，確定最不穩定波的擾動參數和最易失穩的流向、展向位置;對三維擾動的非平行非線性邊界層穩定性的研究，得到更精確的擾動放大因子值。
  5. The two - dimensional axisymmetric subsonic - transonic - supersonic flow in an experimental arcjet thruster is simulated numerically using flux vector splitting method. the profiles of density, velocity, temperature, pressure and mach number can be obtained by the computation. the computation grid and some computed results are given here. the test equipment such as power supply system, ignition system, propellant supply system, arcjet thruster, thrust measuring device and vacuum system are introduced briefly. some working phenomena of the arcjet are observed and discussed. three different kinds of instability appeared in the process of the experiments. except some important parameters are measured, it is found that the operating stability of argon is better than that of nitrogen

    對一實驗電弧加熱式發動機二維軸對稱亞跨超音速流動進行了數值模擬，所採用的方法是矢通量分裂演算法.通過計算可以得出密度、速度、溫度、壓力和馬赫數的分佈.給出了計算所使用的網格和一些計算結果.簡要介紹了實驗所使用的設備，如電源系統、點火系統、推進劑供給系統、電弧加熱式發動機、推力測量裝置和真空系統.對所觀察到的一些工作現象進行了討論.有三種不同的不穩定性出現于實驗過程.除了所測量的一些重要參數，通過實驗發現氬比氮工作更穩定
  6. The experimental investigations are performed on a three - dimensional boundary layer of a 45 degree swept back flat plate, which is subject to cross - flow instability

    =本文對承受橫流不穩定性的三維附面層進行了實驗研究。
  7. Numerical study for the resonant triad interaction and secondary instability in a two - dimensional supersonic boundary layer

    二維超音速邊界層中三波共振和二次失穩機制的數值模擬研究
  8. In this thesis, the parabolic stability equations ( pse ) in the different coordinate systems are driven from navier - stokes ( n - s ) equations. the stability problems of the boundary layers for three - dimensional body, and the spatial evolution process of the c - type instability are studied

    本文從navier - stokes （ n - s ）方程出發，導出了不同坐標系下的拋物化穩定性方程（ pse ） ，研究了三維物體的邊界層穩定性問題，以及三維擾動的c型失穩的空間演化過程。
  9. Firstly, two - dimensional rt instability in cylindrical geometry was simulated by the lared - s code and the results agreed well with the linear theory of rt instability in cylindrical geometry

    首先，利用lared - s程序模擬二維柱幾何中rt不穩定性的增長，計算結果與線性理論符合得很好，檢驗了程序的可靠性。
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