| 6 | 1/1 | 返回列表 |
| 查看: 1020 | 回復(fù): 5 | ||
11hours銅蟲(chóng) (小有名氣)
|
[求助]
什么是 first order approximation?
|
|
| first order approximation 是什么意思?第一近似么?麻煩詳細(xì)解釋一下。 |
銅蟲(chóng) (小有名氣)
|
文獻(xiàn) 《Numerical Analysis of Hydrogen Transport Near a Blunting Crack Tip》 作者 P.Sofronis 等 語(yǔ)境 討論H擴(kuò)散通量勢(shì)函數(shù)中應(yīng)力勢(shì)函數(shù)部分。應(yīng)力部分的勢(shì)函數(shù)等于平均應(yīng)力乘以H偏摩爾體積。下面跟的這一句“the assumption of dilational distortion is known to be correct to a first order approximation (Hirth, 1977 )” |

銅蟲(chóng) (小有名氣)
銅蟲(chóng) (小有名氣)
|
維基 order of approximation In science, engineering, and other quantitative disciplines, orders of approximation refer to formal or informal terms for how precise an approximation is, and to indicate progressively more refined approximations: in increasing order of precision, a zeroth order approximation, a first order approximation, a second order approximation, and so forth. Formally, an nth order approximation is one where the order of magnitude of the error is at most xn, or in terms of big O notation, the error is O(xn). In suitable circumstances, approximating a function by a Taylor polynomial of degree n yields an nth order approximation, by Taylor's theorem: a first order approximation is a linear approximation, and so forth. |
| 6 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 348求調(diào)劑 +6 | 小懶蟲(chóng)不懶了 2026-03-28 | 6/300 |
|
|---|---|---|---|---|
|
[考研] 309求調(diào)劑 +10 | 誰(shuí)不是少年 2026-03-29 | 10/500 |
|
|
[考研] 求調(diào)劑 +5 | 青春裁為三截 2026-03-29 | 5/250 |
|
|
[考研] 材料與化工304求B區(qū)調(diào)劑 +4 | 邱gl 2026-03-26 | 7/350 |
|
|
[考研] 294分080500材料科學(xué)與工程求調(diào)劑 +8 | 柳溪邊 2026-03-26 | 8/400 |
|
|
[考研] 0856材料化工調(diào)劑 總分330 +14 | zhubinhao 2026-03-27 | 14/700 |
|
|
[考研] 329求調(diào)劑 +7 | 星野? 2026-03-26 | 7/350 |
|
|
[考研] 317求調(diào)劑 +6 | 十閑wx 2026-03-24 | 6/300 |
|
|
[考研] 材料277求調(diào)劑 +7 | min3 2026-03-24 | 7/350 |
|
|
[考研]
|
18419759900 2026-03-25 | 8/400 |
|
|
[考研] 085600材料與化工調(diào)劑 +10 | A-哆啦Z夢(mèng) 2026-03-23 | 16/800 |
|
|
[考研] 322求調(diào)劑 +4 | 我真的很想學(xué)習(xí) 2026-03-23 | 4/200 |
|
|
[考研] 081200-11408-276學(xué)碩求調(diào)劑 +3 | 崔wj 2026-03-26 | 3/150 |
|
|
[考研] 中國(guó)科學(xué)院深圳先進(jìn)技術(shù)研究院-光纖傳感課題組招生-中國(guó)科學(xué)院大學(xué)、深圳理工大學(xué)聯(lián)培 +5 | YangTyu1 2026-03-26 | 5/250 |
|
|
[考研] 309求調(diào)劑 +4 | gajsj 2026-03-25 | 5/250 |
|
|
[考研] 一志愿南航 335分 | 0856材料化工 | GPA 4.07 | 有科研經(jīng)歷 +6 | cccchenso 2026-03-23 | 6/300 |
|
|
[考研] 290分調(diào)劑求助 +3 | 吉祥止止陳 2026-03-25 | 3/150 |
|
|
[考研] 347求調(diào)劑 +4 | L when 2026-03-25 | 4/200 |
|
|
[考研] 材料專碩331求調(diào)劑 +4 | 鮮當(dāng)牛 2026-03-24 | 4/200 |
|
|
[考研] 269求調(diào)劑 +4 | 我想讀研11 2026-03-23 | 4/200 |
|