导数

If the measurement data are demarcated, the acceleration curve can also be calculated by solving the second order differential coefficient of measurement curve.

如果对测量值进行标定，还可以通过对测量值曲线求二次导数得到振源的加速度曲线。

The inflexion is the second differential of the speed curve and the physical meaning is the same to the jerk, so the jerk is introduced into the control model of anti-skid system.

拐点是制动曲线的三阶导数，它的物理意义和冲动不谋而合，这也是本文在防滑器控制模型中引入冲动物理量的原因之一。

Now let's discuss the solution of differential equation of the form y=f, and assume the function f has continuous partial derivative.

1现在讨论型如y=f的微分方程的解，这里假设函数f有连续的偏导数。

The boundary value problem for first-order differential equations with a parameter refers to the finite solution condition of equation which includes unknown quantity and its first-order derivative that not only relies on interval value but also relies on the parameter of the equation,which is always settled by fixed point theory or successive approximation method.

含一个参数的一阶微分方程边值问题是指：含有未知量及它的一阶导数的方程的定解条件不仅依赖于在区间端点的取值，而且依赖于方程中的参数。通常它用不动点定理或逐步逼近法来解决。

Again with an algorithm that has no explicit recourse to the directional derivative and for which ranking information is sufficient.

这是又一个不需要直接导数的算法，秩信息已经足够。

Using the domain derivative of the far-field pattern for eddy-current inverse problem with Dirichlet boundary condition,a new algorithm to recover the shape of cracks was constructed and some numerical examples were given.

运用Dirichlet边界条件下涡流检测反演的远场区域导数，构造了反演缺陷形状的一种新算法，并且给出了二维及三维的算例，数值反演的结果与实际缺陷吻合得较好。

Compared with the known results,the nonlinearity is allowed to change sign and is involved with the first-order derivative explicitly.In particular,the boundary condition includes the Dirichlet boundary condition and Robin boundary condition.

与现有工作相比，我们所考虑的动力方程不但非线性项可变号，而且包含一阶导数项，所考虑的边值条件更具一般性，比如可以包含Dirichlet及Robin边值条件等。

The match models were recalculated after the first derivative. Better results are achieved and the discriminability is remarkably enhanced, especially to the minimums distance model.

标 签 高光谱遥感地物光谱最小距离光谱角度匹配光谱相似度匹配导数 hyperspectral remote sensing spectral match model minimums distance SAM SCF derivative

As a result, it is interesting that all of the different displacement derivative BIE can be transformed to the natural BIE.

从而建立了这些位移导数边界积分方程之间的转换关系，它们均可以归结为自然边界积分方程。

Then after the author researches the interaction problem of the partial derivative operators with respect to the two points P and Q, analytical expressions as well as series expansions of the kernel function within disturbing gravity field elements are determined, and their explicit expressions which can be applied practically are given for the first time.

深入研究了关于 P 和 Q 两点局部导数算子的相互作用问题，得到了扰动场元之间核函数和协方差函数的解析与级数展开式，首次给出了较为实用的明晰表达式。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。