quantity n. 1.量 (opp. quality); 分量,數(shù)量;額;【物理學(xué)】值,參量。 2.〔pl.〕大量,大宗,大批,許多。 3.定量,定額。 4.【數(shù)學(xué)】量;表示量的數(shù)字[符號(hào)];【邏輯學(xué)】(名詞、特別是命題主語(yǔ)的)量。 5.【音韻學(xué)】音節(jié)的長(zhǎng)短;表示音節(jié)長(zhǎng)短的符號(hào);【語(yǔ)音】(元[母]、音節(jié)等的)音量。 6.【法律】期限。 a known quantity 已知數(shù)。 an unknown quantity 未知數(shù);〔比喻〕難預(yù)測(cè)的人[物]。 a negligible quantity 可忽略的量;〔比喻〕無足輕重的人〔物〕;可忽略的因素。 a quantity of 一些。 in quantities 大量。 in quantity 很多。
variable adj. 1.易變的,變化無常的,無定的 (opp. constant, steady)。 2.可變的,能變的;變換的。 3.【數(shù)學(xué)】變量的;【天文學(xué)】變光的;【生物學(xué)】變異的。 Prices are variable according to the exchanges. 物價(jià)跟著匯率變動(dòng)。 a man of variable character 反復(fù)無常的人。 a rod of variable length (伸縮)如意棒。 a word of variable construction 可以作種種解釋的詞。 variable capital 可變資本。 a variable budget 臨時(shí)預(yù)算。 n. 1.易變的東西。 2.【數(shù)學(xué)】變量,變數(shù),變項(xiàng),變?cè)?(opp. constant);【天文學(xué)】變星 (=variable star);【航海】(方向不定的)變風(fēng),不定風(fēng) (opp. trade wind); 〔pl.〕 (貿(mào)易風(fēng)帶中的)變風(fēng)帶。 adv. -ably ,-ness n.
He now called a variable quantity a fluent . 他現(xiàn)在把變量叫做流。
He now called a variable quantity a fluent and its rate of change, the fluxion . 他現(xiàn)在把變量叫做流,變量的變化率叫做流數(shù)。
How to vary the two variable quantity of the buck - boost basic circuit on the high frequency switching and whether or not their varying laws are fit for their theoretical conclusion 高頻開關(guān)下的buck - boost電路中各個(gè)變量的動(dòng)態(tài)變化如何,其變化規(guī)律是否與理論上的推導(dǎo)一致。
Secondly , agreement between the result from the mentioned eigenvalue arithmetic and the result from numerical calculation in the airfoil differential equation with runge - kutta method which obtain the trend of physical variable quantity demonstrate the fact that the assumed model and the given equations are valid 其次,通過用龍格?庫(kù)塔的數(shù)值方法對(duì)微分方程進(jìn)行迭代,所求出的系統(tǒng)各振動(dòng)量變化規(guī)律和上述算例的特征值對(duì)比,結(jié)果是一致的。這就驗(yàn)證了建模的合理性和方程推導(dǎo)的正確性。
The slope geometry is variable quantities , and the reliable safety and reliability are main limiting factors . according to the above factors , a optimized model for designing high loess slope is established . this model ' s concept is precise , and its physical meaning is confirm , people who do designing work can see this model as a means 最后,為了使邊坡設(shè)計(jì)獲得最佳工程效果,本文在崔政權(quán)建立的優(yōu)化公式: c = a + pf ? b的基礎(chǔ)上,全面考慮施工造價(jià)和風(fēng)險(xiǎn)造價(jià),運(yùn)用數(shù)學(xué)原理和優(yōu)化理論,用費(fèi)用?效益分析方法,以最小總期望造價(jià)為目標(biāo)函數(shù);以坡型、坡比為設(shè)計(jì)變量,以安全可靠為主要約束條件,建立了黃土高邊坡的優(yōu)化模型。
At first , buck - boost circuit is detailed analyzed and derived strictly in the theory , and on the base , the current of the inductance and the output voltage are analyzed elaborately . when the input voltage is the ac voltage with the nomal frequency , the two variable quantity are analyzed and some conclusions are concluded by means of equal length separation methods and introducing function methods and derivative - equation methods . and this is the basis of the next proceeding 首先,對(duì)buck - boost電路進(jìn)行了嚴(yán)謹(jǐn)?shù)乩碚撏茖?dǎo),先對(duì)buck - boost電路在輸入為直流電壓時(shí)的工作情況進(jìn)行了分析;在此基礎(chǔ)上,對(duì)輸入為工頻交流電壓時(shí)的電感電流、輸出電壓作了詳細(xì)分析,利用等間距離散化方法、引入函數(shù)法、微分方程法分別對(duì)變量進(jìn)行了推導(dǎo)和總結(jié),為下一步工作奠定了理論基礎(chǔ)。
英文解釋
a quantity that can assume any of a set of values 同義詞:variable,