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)
The characteristic of cubic - hermite interpolating function indicates that it can approach to the highway horizontal alignment curve with a high degree , and simple in calculation 埃爾米特插值函數(shù)的特點(diǎn)決定其能很好地逼近被插值函數(shù),且計(jì)算過(guò)程簡(jiǎn)便。
This article establishes a highway horizontal alignment design method bused on cubic - hermite interpolating function , which has a practical reference for future work 本研究建立了公路平面線形設(shè)計(jì)的埃爾米特插值函數(shù)方法,可供公路平面線形設(shè)計(jì)工作參考。
For the variables with greater gradient , a high - precision interpolating function , such as quasi - consistence hexahedral element method , is naturally necessary to be adopt 開(kāi)邊界給定方式宜采用速度dirichlet條件和流動(dòng)壓力neumann條件,以利用壓力無(wú)反射條件,加快計(jì)算收斂速度。
To improve computing precision , the latter applies interpolating function of curved - quadrilateral element containing six npdes to thicking the influence surface of grillage . compared with lagrangian interpolation for rectangular element and triangle plane interpolation , this way not only improves computing precision but be more suitable for the curved - bar grillage analyzing method introduced this paper 為了提高計(jì)算精度,本文應(yīng)用六結(jié)點(diǎn)曲邊四邊形單元插值函數(shù)加密梁格影響面,與矩形單元拉格朗日插值及三角平面插值方法相比,不但提高了計(jì)算精度,且更適于曲桿梁格分析。
The verification of the algorithm is performed using a gauss - distributed concentration ball and a stock wave at steady flow in an open channel . the comparison with an analytical problem solution shows that the precision and the stability of quasi - consistence hexahedral element method is as good as that of consistence hexahedral element method , better than that of the linear interpolating function method 6 、比較分析了網(wǎng)格布置形式對(duì)圓管流動(dòng)和臺(tái)階突擴(kuò)流動(dòng)計(jì)算結(jié)果的影響后表明,應(yīng)在物理量梯度變化較大的區(qū)域適當(dāng)加密網(wǎng)格,才能較好地模擬這些區(qū)域的流動(dòng)特性以及壁面對(duì)整個(gè)流動(dòng)的影響。
The solution algorithm involves tracing the characteristic lines backwards in time from a upwind element of an interior point . two advanced mehtods , quasi - consistence and consistence hexahedral element method , for three - dimensional advective problem are developed . and comparison of these two methods with linear interpolating function method is implemented 當(dāng)re 400時(shí),流動(dòng)明顯地具有二維性; re 800時(shí),流動(dòng)具有一定程度的三維性,而且出現(xiàn)了次回流區(qū); re 1000時(shí),流動(dòng)則具有明顯的三維性。
Important missing aspects are : turbulent flow , numerical discretization techniques specially the relevant and difficult topic of numerical treatment of advection and related numerical methods of solution , variable property fluids , boundary layers , stability , etc . rather , it focuses on more primitive and fundamental issues of numerical treatment of advective equation and proper formulation of initial boundary value ( ib vp ) . numerical problems associated with advective dominated transport include spurious oscillation , numerical dispersion , peak clipping , and grid oriention . however , the key of numerical solution of three - dimensional advective problem is searching for a high - precision interpolating function , which can keep the computational stability and low damping 3 、針對(duì)三維純對(duì)流方程提出了實(shí)用的擬協(xié)調(diào)單元模式,并與線性插值模式和協(xié)調(diào)單元模式比較后表明,在物理量大梯度變化的情況下,線性插值模式會(huì)產(chǎn)生較大的數(shù)值阻尼,導(dǎo)致解的失真;協(xié)調(diào)單元模式具有極高的計(jì)算精度和良好的計(jì)算穩(wěn)定性,還可較好地克服數(shù)值阻尼,但由于計(jì)及物理量的二階導(dǎo)數(shù)項(xiàng),計(jì)算工作量大,邊界條件給定尚存在一定的困難;而擬協(xié)調(diào)單元模式不僅具有協(xié)調(diào)單元模式計(jì)算精度高的優(yōu)點(diǎn),還避免了物理量的二階導(dǎo)數(shù)項(xiàng),可大大地減少計(jì)算工作量。
Secondly , a new adaptive osculatory rational interpolation kernel function is constructed from the point of approximating the ideal interpolating function , the function ' s characteristics , i . e . , the space properties , the spectral properties , and the efficiency are analyzed , and the comparision it with other interpolation methods is made 然后,在圖像采樣和圖像重建理論的基礎(chǔ)上,基于逼近理想插值核函數(shù)的思想,構(gòu)造了一種自適應(yīng)切觸有理插值函數(shù),對(duì)其空域和頻域的性能進(jìn)行了分析,并與傳統(tǒng)的圖像插值核函數(shù)進(jìn)行了比較。