first derivative

Some first order time derivative terms are contained in the equations.

方程中含有强迫场的一阶时间导数项。

Meanwhile, the internal force vector and the element tangent stiffness matrix could be obtained from calculating directly the first derivative and second derivative of the element strain energy with respect to the nodal variables, respectively.

同时，采用矢量型转动变量，可以直接从计算单元应变能泛函对节点变量的一阶和二阶偏微分得到单元内力矢量和切线刚度矩阵。

The Tesla Roadster Sport is the first derivative of Tesla's proprietary, patented powertrain.

特斯拉跑车的运动,是特斯拉的专利, 专利的一次微分动力系统.

For the first time, derivative distribution of velocity in cell is presented and some new conclusions are obtained.

首次给出了电池内的速度导数分布，得出了一些新的结论。

It is first discovered that guazatine can react with benzoin and its derivative has strong fluorescence.

首次发现双胍辛胺与安息香可发生反应,产物具极强的萤光活性.

Peakon solutions have discontinuous first derivative on the peaks and can be described by Dirac function.

Peakon解在波峰处一阶导数不连续,但可用Dirac 广义函数表示.

It was also found that first derivative spectrometric value of polysaccharide-phenol-sulfuric acid reaction system is directly proportional to the content of polysaccharides.

本文研究还发现多糖苯酚硫酸显色反应体系的一阶导数光谱值与多糖含量成正比，据此建立了苯酚硫酸显色导数光谱分析多糖的方法。

Identification of spillage oil at sea with first derivative fluorescence spectra was discussed.

一阶导数荧光光谱鉴别海面溢油，其光谱特征用模糊数学方法作了分析；计算了各种油之间的模糊相似程度；

The doxycycline hydrochloride and its preparations were determinated by first derivative differential pulse polarography.

建立了盐酸多西环素及制剂的一阶导数差示脉冲极谱测定法。

The partial derivatives of second order to the innovation time and spillover effect for the expected net revenue function were obtained to establish the partial derivative of first order for the correlation between the optimal innovation time and spillover coefficient.

将该收益函数对创新时间和溢出效应系数变量求出二阶偏导数以建立最优创新时间和溢出效应系数之间的一阶导数关系。

At the same time, the inversion algorithm of Central Loop Transient Electromagnetic Method ( CLTEM) for all time apparent vertical conductance and apparent depth was proposed by using EMF and its first derivative.

通过利用感应电动势及其一阶导数表达式作简单数学推导，给出了全区视纵向电导与视深度的反演算法。

Monte Carlo technique has two obvious advantages, the first is very flexible and easy to implement and the second is estimated error and convergence rate and independence of dimension of solving problem, which can be able to solve multiple high-dimensional derivative securities pricing.

其中蒙特卡罗技术由于具有比较灵活且易于实现、估计误差及收敛速度与解决问题的维数独立等两个明显优势，从而能够较好地解决基于多标的变量的高维衍生证券的定价问题。

Spectra of 700 typical samples were collected to develop the calibration models, among which the raw spectra were pretreated with first derivative and partial least square.

收集700个具有代表性样品的光谱，建立其相应指标的近红外模型。

The difference between an ordinary and a partial derivative was at first not explicitly recongized.

通常的导数与偏导数的区别在一开始并未被人们明确地认识.

Time-fractional order reaction-diffusion equation was considered, which obtained from the standard reaction-diffusion equation by replacing the first-order time derivative by a fractional derivation of order α( 0 < α < 1).

考虑时间分数阶反应-扩散方程，它是从标准的反应-扩散方程中用分数阶导数α（0

Making use of the fourth-order compact difference formula of the first derivative term, anew high accuracy difference scheme for the two-dimensional convection reaction equation is proposed.

利用一阶偏导数项的四阶紧致差分算子，直接推导出了数值求解二维对流反应方程的一种新的高精度紧致差分格式。