1)  equation [英][ɪ'kweɪʒn]  [美][ɪ'kweʒən]

1.
Study on the equation of scale-inhibiting efficiency of polyaspartic acid;

2.
A modified equation for correlating experimental data——nonintegral power polynomial equation;

2)  equations [英][i'kweiʃən]  [美][ɪ'kweʃən]

1.
At first,the limitation of the general heat conduction equation is discussed and then,nonlinear heat conduction equations are derived,when we consider that thermal conductivity,specific heat capacity and density are dependent of temperature.

2.
In a polynomial system of equations (PS)=0,let m>0 be the number of equations,and n>0 be the number of variables.

3.
A mathematical model of parametric equations of theoretical and practical tooth profiles is established.

3)  formula [英]['fɔ:mjələ]  [美]['fɔrmjələ]

1.
The empiric formula is derived for the friction coefficient of bearing, thus providing the basis for the design of machines.

2.
The purpose of this study was to study energy expenditure of different walking speed in order to get formulas which can calculate energy expenditure of walking and daily physical activity.

4)  WAS equation
WAS方程
5)  ∨ ∧ equation
∨-∧方程
6)  equation/KdV equation

 方程equation    含有未知数的等式。例如，求使等式x2－4x＋3＝0成立的数x这个问题中 ，等式x2－4x＋3＝0是一个方程。方程的一般形式是 F（x，y，…，z）＝G（x，y，…，z），字母x，y，…，z代表未知数 ，等号两边是解析式。含n 个未知数的方程叫做n 元方程。能够使方程两边解析式的值相等的未知数的值，叫做方程的解（或根）。求解的过程叫解方程。    根据方程两边解析式的类型，方程有相应的分类。两边都是代数式的方程叫做代数方程；只要有一边是超越式，就叫超越方程。按同样原则，代数方程又分为有理方程和无理方程。有理方程还可分为整式方程和分式方程。   对于一元整式方程，等式两边的整式次数中的最大者，称为所给方程的次数。例如x－3＝5是一次方程，x3－x＝x2＋5是三次方程。一元一次方程ax＋b ＝0（a≠0）的解是x＝－a/b。一元二次方程ax2＋bx＋c＝0（a≠0）的解是 说明：补充资料仅用于学习参考，请勿用于其它任何用途。 参考词条 ©2011 dictall.com