微分

At the same time the velocity, acceleration and period of vibrating can be calculated by differentiation matrix and barycentric Lagrange interpolation, respectively.

同时，利用微分矩阵和重心Lagrange插值可以方便地求出非线性振动的速度、加速度和振动周期。

For the beam buckling problem, this paper presents the Barycentric Lagrange interpolation collocation method to get the differentiation Matrix of unknown function.

采用重心Lagrange插值多项式建立未知函数的微分矩阵，采用配点法将梁的控制方程表示为代数方程组。

Differential matrices are obtained on the element in accordance with continuous intervals of discontinuous boundary value problem to divide the computing elements and approximating unknown function on the element in term of barycentric Lagrange interpolation.

按照间断边值问题的连续区间划分计算单元，在每一个单元上采用重心Lagrange插值近似未知函数，得到每一个单元上的微分矩阵。

Obtaining the displacement of vibration, the velocity and acceleration are directly computed by differentiation matrices. The period of nonlinear vibration is computed by barycentric Lagrange interpolation collocation method.

计算得到振动位移后，采用微分矩阵和重心Lagrange插值计算非线性振动的速度、加速度和振动周期。

Barycentric rational interpolation collocation method ; rectangular plates ; free vibrations ; differential equation

重心有理插值配点法；矩形板；自由振动；微分方程

And that method is different from the adding base point method and impact method from importing derivatives of higher order.

他与增加基点数目的方法和引入高阶导数的紧致方法不同，是微分方程差分近似高精度化的一种新方法。

In this paper,we use differential-integral algorithm for optimal design of the binary-optics beam splitter.

提出将微分-积分法用于二元光学分束器的设计，以改善其输出对输入变化的敏感性。

ABSTRACT In this paper,we use differential-integral algorithm for optimal design of the binary-optics beam splitter.

摘 要 提出将微分-积分法用于二元光学分束器的设计，以改善其输出对输入变化的敏感性。

Secondly,we give a class of invariant differential operators forCartan domain R of dimension n:If the Bergman metric of R is?

其次，我们对维数为n 的Cartan 域R，给出了一类不变微分算子：若R 的Bergman 度量为ds~2=？

In this paper, we study the pricing problem of the perpetual Bermudan option with jump-diffusion by PDE method.

采用偏微分方程方法讨论了带跳扩散项的永久百慕大期权定价问题。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。