1、

Variable velocity DMO formula which is analOgous to constant velocity DMO formula and Hale's squeezing DMO is derived from the time-distance equation of CRP gather data-The method is a revised version of constant velocity DMO;

本文从共反射点时距曲线方程出发,导出了类似于常速DMO公式的变速DMO公式(与Hale等称之的squeezingDMO相类似)。

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2、

Totally implicit difference scheme and linear iterative in each time step are used to solve the non-linear equation of coupled moisture and heat transfer.

应用系数效应滞后的全隐式有限差分格式并在每段时间采用线性迭代法来处理非线性水热耦合迁移方程。

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3、

The paper changes the non-linear equation into a non-linear parabolic equation by a kind of change and proves the blow up of solution of its initial boundary value problem in finite time by using convexity method and maximum principle.

本文以一种变换。化非线性方程为非线性抛物型方程,并利用凸性方法及最大值原理证明其初边值问题的解于有限时间内blow up。

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4、

The complex pressure distribution in the model makes the fluid flow computation of horizontal well be fairly complicated, so the non-linear equation describing fluid flow performance has been applied for space iterative computation followed by time iterative computation.

由于所用气藏模型压力分布较为复杂,使得水平井的流动计算变得相当复杂,应用表征流动特性的非线性方程对空间进行迭代计算,再向时间推进。

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5、

The calculation formulas for velocity coefficients φ_2 and φ_5 for the throat and throat inlet section were deduced from the theoretical research on the velocity coefficients in time-averaged basic equations by use of the unsteady momentum equation and time-averaged value calculation method.

运用非恒定的动量方程和时均值计算方法,对脉冲液体射流泵时均值基本方程中的流速系数进行了理论研究,推导出了喉管和喉管进口段流速系数φ2和φ5的计算式。

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7、

Solutions of the second mixed boundary value problems for the time fractional telegraph equation

时间分数阶电报方程第2类混合边值问题的解

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9、

This paper firstly introduces the theory of the calculation of crosstalk among lines, including basic principle of Finite Difference Time Domain Method, grid partition, numerical stability and absorbing boundary conditions, telegraph equation of transmission lines and the calculation of unit length parameter matrices.

论文先介绍了研究串扰问题的理论基础,包括时域有限差分法的基本原理、网格划分、数值稳定性和吸收边界条件以及多导体传输线理论的电报方程和单位长度参数矩阵的计算。

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10、

For the calculation of telegraph equation, we use barycentric rational interpolation collocation method. For the nodes of time domain and space domain, we approximate the unknown functions with rational interpolation. And we discrete the initial boundary value conditions with the same method.

对于电报方程的求解,我们采用重心有理插值配点法,对时间域和空间域上的节点均采用重心有理插值来近似未知函数,将初边值条件也进行相同的离散。

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11、

The tendency equation of disturbance energy is used to discuss the stability of disturbance in the different latitude zones over the Northern Hemisphere, and obtains that the disturbance energy decreases with time in middle and high latitudes over the Northern Hemisphere.

本文还用扰动能量发展方程讨论了北半球各纬度带扰动的稳定性问题,得出在中高纬度地区扰动的能量随时间是递减的,它满足了扰动稳定的充分条件。

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12、

Using separation theorem of convex set and the time terminal value function equation, we obtain the determining method of optimal terminal time as well as the Maximum principle.

由凸集分离定理及终端时间阈值函数方程,我们获得了最大值原理及最优控制时间的确定方法。

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13、

In this paper, we prove the existence and uniqueness of the solution to forward-backward stochastic differential equations, where the terminal time associated with the backward stochastic differential equation is a finite stopping time.

在这篇文章中,我们证明了正倒向随机微分方程的解的存在性和唯一性,其中,倒向随机微分方程的终端时为一有限的停时。

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14、

Using the equation, regarding the projection angle as a small quantity, neglecting the differentiation of the absolute value of the tangential velocity with respect to the time, the P.C. Chou formula was easily obtained.

利用爆轰驱动平板的抛射角方程,在小抛射角条件下,假设切向速度大小随时间的变化率为零,很容易得到周培基(P.C.Chou)公式。

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A physical model describing the heat and mass transfer processes of the evaporating thin film is set up and an evolution equation which shows the development regularity of dimensionless film thickness with time is obtained from the liquid vapor interfacial conditions.

论文对平面蒸发薄液膜的传热传质过程建立了物理模型,从汽液界面上的边界条件得到无量纲液膜厚度随时间变化的发展方程。

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16、

A new approach is presented to efficiently solve the three dimensional space time reactor dynamics equation which overcomes the disadvantages of current methods.

为快速求解反应堆三维时空动力学方程,克服已有方法的局限,提出了一种新的求解方法。

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17、

The set of ordinary differential equations is integrated with the Runge Kutta Gill method according to the required time accuracy. The same spatial discretion is adopted for the Poisson equation. The successive over relaxation method is used.

随时间变化的发展方程采用Runge Kutta Gill法求数值解,在空间上离散的Poisson差分方程采用超松弛迭代法求解。

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18、

The mathematical equation of spatial evolution and time advance, the immersed boundary method that are used to calculate the force between the fluid and the roughness element, and the set of entrance and exit boundary conditions are briefly introduced.

对于空间演化和时间推进的数学方程,计算流体与粗糙元之间作用采用的内嵌边界方法的原理和使用,入口和出口边界条件的设置等进行了简要的介绍说明。

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The relationships between elastic properties and gas hydrate/ free gas concentration are presented based on the models of weighted time average wood's equation, seismic wave propagation in three phases effective medium and elastic modulus.

基于时间平均-Wood加权方程、三相介质波传播理论模型和弹性模量模型,计算并阐述含天然气水合物岩石弹性参数与水合物饱和度、含游离气岩石弹性参数与游离气饱和度的关系;

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This paper presented a method that describes the state equation of maneuvering flying target as current statistical model, connects with bridge function, then realize the digital simulation stable, accurate and in real time.

因此,采用当前统计模型建立机动飞行目标的空间运动方程,并结合桥函数级数理论求解,实现了对机动飞行目标稳定、准确、实时地仿真计算。

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