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 簡要的說明。 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。
Abstract : in this paper, the authors study the initial value problems of a class of weakly nonlinear differential equation . the first and the second order approximate solutions are obtained . their accuracies are high and the more the approximate order is high, the more the accuracy is high . if the regular perturbation method is used to solve the same problems, then, when the independent variable is big, so is the error of the solution 文摘:用插值攝動法1研究一類弱非線性常微分方程的初值問題,得到了一級及二級近似解.解的精度很高,并逐級提高.如果用正則攝動法求解此類問題,則當(dāng)自變量較大時,誤差很大