相关知识点: 试题来源: 解析 A。在方程中,“coefficient”指的是与变量相乘的数字,即“系数”,B 选项“常数”是不与变量相乘的固定值;C 选项“未知数”通常指的是 x 这样的变量;D 选项“等式”是整个方程的表述,不是“coefficient”的意思。反馈 收藏 ...
Advances in Water ResourcesLowe B. D. (1991), A numerical method for determining a coefficient in an elliptic equation, Adv. in Water Res. 14(2), pp. 64-68.B. D. Lowe, A numerical method for determining a coefficient in an elliptic equation. Parameter identification in ground water ...
In a chemical equation, the coefficient of substance C is 4 and the coefficient of substance D is 2. What is the ratio of the number of moles of C to D? A. 1:2 B. 2:1 C. 3:1 D. 4:1 相关知识点: 试题来源: 解析 B。系数之比等于物质的量之比,所以 C 和 D 的物质的量之...
The distribution coefficient equation is still valid for any value of n. 对任一级n,分配系数关系式仍然是成立的. 辞典例句 Solenoid valve flow coefficient generally small, and the work of a very small pressure difference. 电磁阀一般流通系数很小, 而且工作压力差很小. 期刊摘选 Make coefficient of ...
An optimal estimation approach for distributed Manning roughness coefficient in an overland flow based on the adjoint method is here proposed. Through some appropriate assumptions and simplifications, the governing equation describing the system is derived from the first continuity equation of the well-kno...
1.A number or symbol multiplied with a variable or an unknown quantity in an algebraic term, as 4 in the term 4x,orxin the termx(a+b). 2.A numerical measure of a physical or chemical property that is constant for a system under specified conditions, such as the coefficient of friction...
An equation relating the father wavelet (scaling function) or mother wavelet to translates and dilations of the father wavelet. Dilation equations generate the coefficients of filters. Filter Operators on signals that act via averaging and differencing to produce new signals. A nested sequence of inn...
Determination of a coefficient in an acoustic equation with a single measurement For the solution u(p) = u(p)(t, x) to ?t2 u(t, x) ? div(p(x)?u(t, x)) = 0 in (0, T) ×Ω with given u|(0,T)×?Ω, u(0, ) and ?t u(0, ), we......
N is the number of equations, see Equations You Can Solve Using Partial Differential Equation Toolbox. To write the coefficient c for inclusion in the PDE model via specifyCoefficients, give c as either of the following: If c is constant, give a column vector representing the elements in ...
Bessel's equation: (17.16)x2d2ydx2+xdydx+(λ2x2−n2)y=0 Legendre's equation: (17.17)(1−x2)d2ydx2−2xdydx+n(n+1)y=0 In certain other cases an equation with variable coefficients can be converted into one with constant coefficients by means of a change of variable. In ge...