equation of diffusion 中文意思是什麼

equation of diffusion 解釋
擴散方程
  • equation : n. 1. 平衡，均衡；平均，相等。2. 【數學】方程式，等式。3. 【天文學】（時）差；均分，等分。4. 【化學】反應式。
  • of : OF ＝Old French 古法語。
  • diffusion : n. 1. 散布，發散。2. 傳播，普及。3. 冗長。4. 【化學】滲濾。5. 【物理學】擴散，漫射。
  1. Error estimates of characteristic finite element method for nonlinear advection - diffusion equation

    非線性對流擴散方程特徵有限元法的誤差估計
  2. The modified method of characteristics with adjusted advection based on weno interpolation for nonlinear convection - diffusion equation

    對流擴散方程的基於加權本質非振蕩插值的調整對流的修正特徵差分解法
  3. Proposal and test of the optimized boyd theca - diffusion equation

    膜擴散最優方程的提出和驗證
  4. The other type of initial value problem of interest for us is the diffusion equation.

    另一類我們感興趣的初值問題是擴散方程。
  5. Parallel algorithm of alternating band crank - nicolson method for the two - dimensional convecton diffusion equation

    求解二維對流擴散方程的交替分帶并行演算法
  6. The boundary condition at bed surface of diffusion equation of nonuniform sediment is derived based on the concept of exchange intensity of stochastic theory by the author

    摘要文中首先給出了由我們建立的床面泥沙交換理論導出的非均勻沙擴散方程的邊界條件。
  7. Firstly we deduce hyperbolic function transformation and then apply to a class of reaction diffusion equation and brusselator reaction diffusion model which has physics, chemistry and biology significance. thus we obtain many new exact and explicit solutions ( including solitary wave soluiton, peoiodic wave solution and rational functions solutions ) to above equations

    推導出了雙曲函數變換，利用此方法探討了一類反應擴散方程， brusselator反應擴散方程這些具有物理、化學、生物意義的方程的精確解（包括奇性孤波解，周期解和有理函數解） 。
  8. Factional step difference scheme for a class of nonlinear reaction - diffusion equation and systems

    一類非線性反應擴散方程及方程組的分數步長差分格式
  9. In this paper, some characteristics of flow movement and sediment transport are analyzed by using the flume experiment data. the cross section of compound channel can be divided into four regions : the undisturbed region in main channel, the interactive region between channel and plain, the undisturbed region in flood plain and the boundary region. in the undisturbed regions, the distribution of longitudinal velocity along the depth has the feature of lograithmic. whereas, in the interactive region, the longitudinal velocity does not obey the logarithmic distribution law, but it can expressed as a revised logarithmic function by using a wake function. on the basis of the kinematic equation the velocity distribution of transverse velocity is obtained. in the boundary region, the longitudinal velocity obeys the law of parabolic distribution. furthermore, according to the simplified diffusion equation, the transverse distribution of sediment concentration in the interactive region is deduced. the analysis is in good agreement with the measured data

    本文根據漫灘水流的運動特點，將漫灘水流的復式斷面分為主槽平衡區、灘槽交互區、灘地平衡區及邊壁區等4個區，並給出了各區寬度的經驗公式.根據灘槽交互區垂線流速分佈的變化特點，提出了附加尾流函數的對數流速分佈公式.在簡化水流運動方程和泥沙擴散方程的基礎上，對灘槽交互區內垂線平均流速及含沙量沿橫向分佈進行了理論分析，提出了反映灘槽水流動量交換強度的橫向渦量粘性系數及橫向擴散系數的表達式，得到了漫灘水流垂線平均流速及含沙量沿橫向分佈的解析解，並與實測資料吻合較好
  10. Modified alternating group methods of four points for the convection - diffusion equation

    對流擴散方程修正的交替分組四點方法
  11. Transport in the diffusion layers and catalyst layers are described by a superposition of knudsen diffusion and stefan - maxwell diffusion, and electrochemical kinetics for anodic methanol oxidation and cathodic oxygen reduction are described by tafel equation

    模型以stefan - maxwell擴散和knudsen擴散的疊加描述了氣體混合物在多孔電極中的擴散過程，以tafel方程描述了甲醇在陽極氧化和氧在陰極還原的電化學動力學。
  12. According to the computation process of the fem and assumption, associating of the fem mesh that have separated and the grouting stress diffusion equation, the integral stiffness matrix and the load matrix can be formatted, then the displacement of the nodal point can be got after solving the simultaneous linear equations. and then the grouting parameter can be computed and analyzed

    然後，依據有限元法的計算步驟和所作的假設，結合已經離散化了的網格、灌漿壓力擴散衰減公式，形成整體剛度矩陣、荷載矩陣，經求解后得到結點的位移，並依此計算分析灌漿參數。
  13. Thirdly, this paper set up the diffusion model of innovation including variant latent consumers such as adopters, possible ones and unknown ones. then given the differential diffusion equation according to the study of the transmission of these three parts and discussed the stability of solution and controllability and measurability of this system. finally described the influence of the economy and government to the innovation diffusion

    再次，本文將創新產品的所有潛在採用者分為可能者、採用者以及未知者三類，並通過分析這三者之間的轉化關系，得出了這三類採用者隨時間變化的微分方程，並運用控制論的方法對方程進行了穩態分析和可控、可測性評價，分析了國家政策等外部因素對加速創新擴散的影響。
  14. Experiment results show that the diffusion equation can be used to describe the transportation process of near infrared photons accurately in scattering media. however, a relatively large error exists for the case of low scattering tissue, and as a result, this model can not be employed for the ot reconstruction in this case

    實驗結果表明，擴散方程可以較為準確地描述光子在強散射介質中的輸運過程;但對弱散射介質擴散方程模型卻存在較大的誤差，因而不適用於該種情況下的圖像重建。
  15. Finally, this paper set up the substitute model between the new technology and the old one and studied characteristic of the diffusion system applied system dynamic method such as the stable points and phase portrait and hopf bifurcation and limit cycle of it. then studied the probability distribution function of them, and the probabilistic equation of this system

    最後建立了四川大學碩士畢業論文創新技術和舊技術的技術更替模型，並運用系統動力學的方法分析了擴散系統在其不動點附近的變化特徵和相圖以及改進系統的hopf分支、極限環等性質，討論了新舊技術的概率分佈，並且將動力學方程轉化為概率方程進行分析。
  16. According to the study of bass equation, it described the distribution features of incubation time, studied the relations between diffusion rate and the coefficient of innovation and imitation, and the time to peak sales and the point of inflection of diffusion function and the maximum diffusion rate

    通過對bass方程的分析，描述了技術創新擴散的生長曲線方程，探討了技術創新擴散率同創新系數和模仿系數的關系以及銷售峰值的到達時間和最大擴散率等醞釀期的擴散特性。
  17. Retrospective time integration scheme of diffusion equation

    擴散方程的回溯時間積分格式
  18. On the basis of distribution of radioactive elements and geological background, the theory equation of radon exhalation rate is derived from the decay rule of radioactive elements and gas diffusion

    根據放射性元素分佈規律、地質背景及放射性元素衰變等，建立了計算氡析出率的理論公式。
  19. The relationship of chloride ions diffusion coefficient with time conforms to power function according to chloride ions " content in each layer of different concrete. based on the relationship, a mathematical model equation of chloride ions diffusion in concrete was deduced as follow : test results show that chloride ions diffusion coefficient decreases with the water / binder ratio reducing. when fly ash or slag is properly blended, chloride ions diffusion coefficient will also drop

    通過取樣測得不同技術條件混凝土各層氯離子含量，得到氯離子擴散系數與時間成冪函數關系，據此推出氯離子在混凝土中擴散的數學模型式為：試驗結果表明，氯離子的擴散系數隨著水膠比的減小而降低，適當地摻入粉煤灰或礦渣粉可以有效地降低氯離子的擴散系數。
  20. By solving the equation numerically, the effects of diffusion on the property of the self - deflection of the photorefractive solitons are studied. the results show that the spatial shifts of bright screening solitons and sp solitons depend directly on the voltage factor. for dark solitons, the stronger the input intensity is, the larger the bending - angle is, whereas bright solitons depend on the input intensity nonlinearly

    在考慮一階擴散效應后，通過數值計算分析和比較了三種光折變空間孤子的自偏轉特性，得出屏蔽和屏蔽光伏明孤子的偏轉量與分壓系數成近似線性關系，與入射光強成非線性關系，而暗孤子偏轉量隨入射光強的增加而增加。
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