approximate equation 中文意思是什麼

approximate equation 解釋
近似方程
  • approximate : vt 1 使接近。2 接近；走近。3 近似，約計。4 模擬。5 估計。vi 近於。 His income this year approxima...
  • 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。
  1. The relation of radius of curvature and error as well as formulas of increasing parameters on condition of constant error are diverted. the equation of the line on the center of approximate circular arc is obtained ， and it can avoids the trouble that numerical solution owns possibility of no convergence and simplifies node calculation of non - circular curve

    導出了曲率半徑與逼近誤差之間的關系和等誤差條件下的參數遞推公式，建立了通過逼近圓弧圓心的直線方程和圓心坐標計算公式.按這種方法用圓弧逼近平面參數曲線，不需要求解非線性方程組，避免了計算可能不收斂的麻煩，簡化了非圓曲線的節點計算過程
  2. Applying the results to optimal controller to realize the minimizer of the cost function of mkdv - burgers equation under neumann and dirichlet boundary control. secondly, using inertial manifold and approximate inertial manifold theory, the approximate inertial manifold under fourier bases is given and we construct a set of odes of three modes to obtain the long - time dynamic behavior

    其次，利用慣性流形和近似慣性流形理論，給出mkdv - burgers方程在fourier基下的近似慣性流形，並且把這一方程所確定的無窮維動力系統約化為一組三模態下的常微分方程組，從而研究這一方程所確定的動力系統的長期動力學行為。
  3. And finally, with hllc and lax - friedrichs type approximate riemann solver for discretising conservative equations and a nonconservative equation, a simple accurate and fully eulerian numerical method is presented. compared with the numerical results of hll scheme, the hllc scheme has a high resolution for shock waves and avoiding the nonphysical oscillation of the hll scheme

    最後用lax ? friedrichs格式及hllc格式作為通量函數對守恆一維euler型方程組進行了離散，並將數值模擬結果和saurel的hll格式模擬結果進行了比較，發現：在兩相流數值模擬過程中，相對來說hllc格式對激波的解析度最高，結果最穩定，避免了hll格式在間斷處的非物理性數值振蕩。
  4. The main results achieved in this thesis can be summarized as follows : 1. by means of the fourier series expansion, an approximate analytical propagation equation of flattened gaussian beams ( fgbs ) passing through an apertured paraxial abcd optical system is derived, and illustrated with numerical examples, when the transmissivity of the aperture is t ( x ) = cos ( x )

    用傅立葉級數展開法研究了平頂高斯光束通過有光闌限制的近軸abcd光學系統的傳輸特性，導出了光闌透射率為t （ x ） = cos （ x ）時的近似解析傳輸公式，硬邊光闌的情況可作為= 0的特例得到。
  5. For the first time, the unified " hot " dispersion equation which can be used to analyze structures with different groove profiles is obtained by means of an approximate self - consistent field - theory

    採用近似自洽場論的方法，首次得到了適用於分析不同螺旋槽結構的統一的「熱」色散方程。
  6. To get so - called c - best - approximate solutin on a certain constrained set c, we employ the constrained regularization method to solve fredholm integral equation of the first kind with nonnegative constraints

    為得到所謂的帶約束的反問題在特定約束集c上的最優解，我們採用約束正則化方法解決非負約束情況下的第一類fredholm積分方程。
  7. In this paper, we expand eigenvalue of poisson equation using bilinear element, by the formulation of the error expanition, we can conclude that it is a upper bound. and by two numerical example, we computer the approximate eigenvalue of poisson equation in square and l - shape domains, then we analyses the approximate eigenvalue. we also extraplate the error expansion and enhance the accuracy of the eigenvalue form the second order to the forth order

    本論文對poisson方程的特徵值採用雙線性元進行展開，得到了誤差展開式，通過誤差展開式，我們能得到特徵值是上界。通過數值算例，計算方形與l形區域上的poisson方程的近似特徵值，並對數據進行分析，驗證了理論的正確性，然後通過對誤差展開式外推，收斂級數可以從二階提高到四階，得到了高精度的解。
  8. Based on the research and model test, the head loss of flap valves is analyzed by both mathematical physics method and the equation of criterion, and the impulsive force and open angle of flap valve are researched. the flap valve approximate - calculation method is the emphases in this paper. the design methods and using effect of air - filled floating flap valve are studied in the paper by combining with engineering example

    在總結前人研究的基礎上，對照試驗結果，通過數理解析和準則方程分析了拍門水頭損失，研究了拍門水流沖力的求解和拍門開啟角度的求解，著重研究分析了拍門近似計算方法，分析拍門在水中的運動規律，並結合工程實例，研究探討充氣浮箱式拍門的配重方法及其使用效果，為今後開拓充氣浮箱式拍門的運用領域作些探討研究。
  9. Essential to their utility is the requirement that the evolution of the basic functions through the propagation environment constitutes a simplified problem with an exact or approximate closed form solution to the original wave equation. the evolution of a spatial fourier harmonic through a homogeneous medium is governed by a reduced wave equation, obtained by applying the fourier transform to the helmholtz equation, with a simple and well - known solution - the plane wave

    這些方法均採用一組具有全局特性的基本函數對波場進行分解，如占據整個空間的富氏調諧函數或充滿各個方向的dirac函數（點源） ，並通過求解基本函數滿足波動方程的精確解或近似解來達到波場外推的目的。
  10. Ph linearization method is employed to solve a nonlinear reynolds equation for a steady state and micro - scale flow field, and the approximate function expressions of gas dynamic pressure and velocity in the spiral groove are obtained

    摘要應用ph線性化方法、迭代法，近似求解了螺旋槽內穩態微尺度流動場的非線性雷諾方程，求得了氣體動壓和速度分佈的解析解。
  11. The comparison of application of wilson equation and regular solution model in the al - based liquid alloys shows that the suitability of regular solution model is restricted because it is only fit for the systems in which the components has the approximate size and structure

    Wilson方程和正規溶液模型在二元及多元鋁基液態合金體系中的比較研究表明：正規溶液模型因為原則上只適用於組元的分子大小和結構相近的體系，其適用范圍受到了限制。
  12. Use the equidistant alternating theory to calculate the approximate equation of gear tooth profile about spiral bevel gear

    計算螺旋錐齒輪近似齒廓方程等距變換法
  13. Quark medium is regarded as non - harmonic oscillator model, discussing its response to su ( 2 ) non - abelia field, the perturlation expansion method is used to find the first, second and third order approximate solutions to the response equation, and some nonlinear features of the response are preliminarily displayed

    將夸克介質視為非簡諧振子模型，討論了它對su （ 2 ）非阿貝爾場的響應，採用微擾迭代法解出了方程的一、二、三級近似解，初步得出了這種響應的一些非線性特徵
  14. We transformed the nonlinear equation of the light - wave envelope in lossy dispersion - managed optical fibers and obtained numerical curve of the equation with the use of mathematical software, then the approximate solution was found by fitting of the curve, also the envelope propagation of the quasi - soliton was analysed

    摘要對有損耗的色散光纖中光波包絡的非線性方程進行變換，藉助數學軟體得到非線性方程的數值曲線，並通過對曲線的擬合得到方程的近似解，對色散管理類明孤子的傳輸進行了分析。
  15. The water quality respond relation of input - output measurements are established by systematic theory in this paper. according to the peculiarity of hydrology and the necessity of water quality inverse problem the multi - parameter inverse problem model based on ordinary differential equation is developed. the existence and uniqueness of the solution of the ordinary differential equation about two parameters or multi - parameter are to be proved. the unstability depending on errors between monitoring data and interpolation approximate data are analyzed and demonstrated. cubic spline interpolation function, the least two multiply and positive rule method are conjoined for obtained solution of multi - parameter. the results from this algorithm indicats its efficient to the multi - parameter identification in water quality modeling

    本文應用系統理論，建立了水質多參數輸入輸出之間的響應關系；根據河流水文水質變化特點和參數反問題的需求，建立了水質常微分方程多參數反問題模型.根據常微分方程參數反問題的數學理論，作者給出了兩參數和多參數水質常微分方程反問題的解的存在性、唯一性的理論證明過程和結論；還針對水質現有監測資料的測驗誤差和插值近似計算誤差造成參數反問題的不穩定性，將三次樣條插值函數、超定方程最小二乘法和正則化演算法有機地結合使用，成功地給出了水質參數反問題的穩定化演算法.最後給出了應用計算結果
  16. By combining the linearization of the governing equation with the method of harmonic balance, we have established analytical approximate formulas for the period and the periodic solution

    將控制方程的線性化與調和平衡法組合起來，建立周期及周期解的解析逼近公式。
  17. And beginning with a perturbed nls equation, using a multi - scales perturbation expansion, we get the zero order and the first order equations, discuss the eigenstates of the operator in the equations, induct relevant " derivative states ", form the completeness of the bounded eigenstates of the associated operator in li space, and expand the corresponding parameters in the closure, get a series evolution equations of the coefficients in the expanded formulas, find the first order approximate solution by researching the evolution equations. this paper also gives the basis of this method - the completeness we have formed and the singular perturbation technique

    ） dinser方程的求解問題，討論了自伴運算元的本徵函數的正交性和完備性，介紹了尋求微分方程的近似解常用的攝動方法，並從帶有某種擾動項的nls方程出發，利用多重尺度的攝動方法得到了方程的零級近似方程和一級近似方程，通過對近似方程中運算元的特徵態的討論，引入適當的「導出態」 ，建立了運算元在l _ 2空間的特徵態的完備性。
  18. At this time, the approximate mechanical model of devices has been put forward, which frequency is 70 mhz, then we analyzed the euler ? bernoulli equation, find that the frequency is determined by the resonator ’ s density thickness and length ; the free - free - beam 、 coupled beam 、 support beam 、 transducer have been designed ; the model was simulated and modal analyzed on the coventorware and were consistent with the designed parameter. the silicon surface microfabrication process was developed and emphatically introduced several key surface microfabrication technologies, and was simulated by coventorware

    本文通過分析歐拉-貝努立方程，得出濾波器的共振頻率主要由諧振梁的密度、厚度和長度決定，考慮切變形和轉動慣量的情況下，完成微機械諧振梁、支撐梁、驅動電容的設計;在coventorware軟體上進行模擬，分析結果與理論設計比較好地吻合;對微機械濾波器的加工工藝進行設計，給出器件的完整的工藝流程，重點介紹微機械表面加工工藝，並在coventorware上進行模擬。
  19. Based on the nonlinear parabolic approximate wave reflection - diffraction equation of mild slope, a model of wave propagation on a fan - shaped coordinate is put forward considering winds, bottom friction and wave breaking, etc. the existing calculation shows that the model can be employed to determine wave fields in large water areas

    接著以非線性的拋物型近似波浪緩坡方程為基礎，提出了扇形坐標下的波浪傳播模型，模型包括了風、底摩阻、波浪破碎等因素的影響，可以用於大水域的波浪場的確定；文章最後介紹了一些計算算例。
  20. This paper explorates the method of nonlinear approximate equation root of " secant line rule " in theory, and disusses two vertexes of secant line rule and one vertex of secant line rule with two kinds of different thought methods and in order to clear some suspicions of learners, which is used as a reference

    現對「割線法」求解非線性方程近似根的方法，從理論上進行了探討，並用兩種不同的思維方式雙點割線法和單點割線法進行討論，來澄清學習者的一些疑惑，以供參考。
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