approximate vt. 1.使接近。 2.接近;走近。 3.近似,約計(jì)。 4.模擬。 5.估計(jì)。 approximate a solution to a problem 使問(wèn)題近于解決。 approximate something to perfection 使某物臻于完善。 The total income this year approximates 10,000 dollors. 今年總收入接近一萬(wàn)元。 approximate the motions of the stars in a planetarium 在天文館中模擬行星的運(yùn)行情況。 We approximated the distance at 100 miles. 我們估計(jì)行程距離為100英里。 vi. 近于。 His income this year approximates to 8,000 dollars. 他今年的收入接近八千美元。 adj. 近似的,大概的。 an approximate account 簡(jiǎn)要的說(shuō)明。 an approximate date 大約的日期。 the approximate estimate 大概的估計(jì)。 an approximate number 概數(shù)。 an approximate value 近似值。 adv. -ly 大體,大致。
Study on data approximate approach of spiral surface profile 螺旋曲面廓型的數(shù)值擬合方法研究
( 2 ) the theory basis and realization methods of the computer simulation approximate approach are discussed in this paper ( 2 )研究了計(jì)算機(jī)模擬逼近法的理論依據(jù)和實(shí)施的技術(shù)方法。
However , the computer simulation approximate approach not only clearly indicates the changes of mechanism position , velocity and acceleration orientation by means of figures , but also obtains the closely same accuracy of the analytics without the boring calculation 計(jì)算機(jī)模擬逼近法既能以圖的形式展示機(jī)構(gòu)位置、速度加速度的方位變化,又能得到與解析法非常相近的求解精度,又不需推導(dǎo)繁瑣的解析公式。
Lastly , aiming at the poor results which all current algorithms do for directional textures , and cannot synthesis texture directly , aiming at the particularity of this kind of textures , we bring forward the conceptions of non frontal parallel textures and frontal parallel textures . by analyzing texture ' s direction through fourier spectrum , we introduce the conception of main direction , and solve the approximation value of texture ' s main direction by discrete approximated approach . by this way , we can synthesis indirectly simple structural non frontal parallel textures 最后針對(duì)現(xiàn)有算法對(duì)帶有方向的紋理合成效果差,無(wú)法直接合成紋理圖像的難點(diǎn),本論文首先提出了非正平行紋理與正平行紋理的概念,分析了它們之間的內(nèi)在聯(lián)系,引入了兩個(gè)角度參數(shù)來(lái)描述紋理的朝向,采用傅立葉頻譜法分析紋理的方向特性,并提出了紋理主方向的概念,本論文引入離散逼近的方法來(lái)求解出紋理主方向的近似值,這樣我們就能用一種間接的方法合成簡(jiǎn)單的結(jié)構(gòu)性非正平行紋理。
Using the method of parabolic regularization , we first study the existence of the optimal control of nondegenerate systems governed by where and jn is mollifying sequence in r . by de giorgi - nash ' s technique , we obtain some uniformly estimates of solutions of regularizing prob - lem , from compactness , we prove the existence of the optimal control of degenerate system by a approximate approach 利用拋物正則化方法,我們首先研究了非退化系統(tǒng)最優(yōu)控制的存在性,其中而j _ n是r上的軟化子。利用degiorgi - nash技巧,對(duì)正則化問(wèn)題的解可以得到一些一致估計(jì),利用緊性,通過(guò)一個(gè)逼近過(guò)程我們得到了退化系統(tǒng)最優(yōu)控制的存在性。