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approximating function中文什么意思

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  1. This feature reflects the physical phenomenon of breaking of waves and development of shock waves . in the fields of fulid dynamics , ( 0 . 2 . 1 ) is an approximation of small visvosity phenomenon . if viscosity ( or the diffusion term , two derivatives ) are added to ( 0 . 2 . 1 ) , it can be researched in the classical way which say that the solutions become very smooth immediately even for coarse inital data because of the diffusion of viscosity . a natural idea ( method of regularity ) is obtained as follows : solutions of the viscous convection - diffusion pr oblem approachs to the solutions of ( 0 . 2 . 1 ) when the viscosity goes to zeros . another method is numerical method such as difference methods , finite element method , spectrum method or finite volume method etc . numerical solutions which is constructed from the numerical scheme approximate to the solutions of the hyperbolic con - ervation laws ( 0 . 2 . 1 ) as the discretation parameter goes to zero . the aim of these two methods is to construct approximate solutions and then to conside the stability of approximate so - lutions ( i , e . the upper bound of approximate solutions in the suitable norms , especally for that independent of the approximate parameters ) . using the compactness framework ( such as bv compactness , l1 compactness and compensated compactness etc ) and the fact that the truncation is small , the approximate function consquence approch to a function which is exactly the solutions of ( 0 . 2 . 1 ) in some sense of definiton
    當(dāng)考慮粘性后,即在數(shù)學(xué)上反映為( 0 . 1 . 1 )中多了擴(kuò)散項(xiàng)(二階導(dǎo)數(shù)項(xiàng)) ,即使很粗糙的初始數(shù)據(jù),解在瞬間內(nèi)變的很光滑,這由于流體的粘性擴(kuò)散引起,這種對(duì)流-擴(kuò)散問(wèn)題可用古典的微分方程來(lái)研究。自然的想法就是當(dāng)粘性趨于零時(shí),帶粘性的對(duì)流-擴(kuò)散問(wèn)題的解在某意義下趨于無(wú)粘性問(wèn)題( 0 . 1 . 1 )的解,這就是正則化方法。另一辦法從離散(數(shù)值)角度上研究?jī)H有對(duì)流項(xiàng)的守恒律( 0 . 1 . 1 ) ,如構(gòu)造它的差分格式,甚至更一般的有限體積格式,有限元及譜方法等,從這些格式構(gòu)造近似解(常表現(xiàn)為分片多項(xiàng)式)來(lái)逼近原守恒律的解。

相關(guān)詞匯

        approximate:    vt. 1.使接近。 2.接近;走近。 3.近似,約計(jì)。 ...
        function:    n. 1.功能,官能,機(jī)能,作用。 2.〔常 pl.〕職 ...
        approximating sequence:    近似序列
        approximating spline:    逼近樣條函數(shù)
        approximating variances:    近似方差
        method of approximating:    近似法
        approximating normal distribution:    近似正態(tài)分布
        approximating optimum allocation:    近似最優(yōu)配置
        a function:    絕對(duì)函數(shù)
        and function:    “與”功能; 及函數(shù); 與酌; 與作用
        and to or function:    或作用; 與-或"作用
        and-function:    "與"作用
        function:    n. 1.功能,官能,機(jī)能,作用。 2.〔常 pl.〕職務(wù),職責(zé)。 3.慶祝儀式;(盛大的)集會(huì),宴會(huì)。 4.【數(shù)學(xué)】函數(shù);與其他因素有密切關(guān)系的事。 The function of the ear is to listen. 耳的功能是聽(tīng)。 the function of education 教育的功能。 discharge one's functions 盡職。 the functions and powers of the National Congress 全國(guó)代表大會(huì)的職權(quán)。 a controllable function【火箭】遙控程序。 public [social] function招待會(huì),文娛晚會(huì),社交集會(huì)。 vital functions 生命機(jī)能。 vi. (器官等)活動(dòng),(機(jī)器等)運(yùn)行,發(fā)揮作用。 function as teacher 擔(dān)任教師。 a sofa functioning as a bed 兼當(dāng)床用的沙發(fā)。 The lathe doesn't function well. 這臺(tái)車(chē)床有毛病。 function digit [letter] 【計(jì)算機(jī)】操作數(shù)碼[字碼]。
        function of:    function迭函數(shù); function合成函數(shù); 元函數(shù)
        no function:    不動(dòng)作(動(dòng)作遲鈍)
        not function:    "非"作用; 非門(mén); 非邏輯操作非功能; 邏輯"非"函數(shù); 邏輯“非”函數(shù)
        not-function:    非功能
        or function:    "或"操作, "或"功能; “或”邏輯函數(shù); 或功能
        s function:    軸功能
        t function:    統(tǒng)計(jì)系數(shù)于標(biāo)準(zhǔn)誤差比率
        function group function grouping:    功能群令
        function of function rule:    復(fù)合函數(shù)法則
        function, function key:    功能,功能鍵
        function-defining function:    定義函數(shù)的函數(shù)
        gamma function; γ function:    伽瑪函數(shù)

其他語(yǔ)言

相鄰詞匯

  1. approximately equivalent 什么意思
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  3. approximately normal distribution 什么意思
  4. approximately semicontinuous 什么意思
  5. approximately-estimated cost 什么意思
  6. approximating normal distribution 什么意思
  7. approximating optimum allocation 什么意思
  8. approximating sequence 什么意思
  9. approximating spline 什么意思
  10. approximating variances 什么意思
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