系数问题

This paper discusses the upper estimates of weighted eigenvalues for Dirichlet problem of membrane vibration.

考虑膜振动Dirichlet问题的带权特征值上界估计，利用试验函数、分部积分以及不等式估计等方法，建立了用前n个特征值来估计第n+1个特征值的上界估计，其估计系数与区域度量无关。

In this paper,a numerical well test method is presented to study the inter-well interference effect on the well test curve,which used PEBI grid and gave the discrete control equations of oil-water-phase flow .

本文用数值试井方法研究了井间干扰对试井曲线的影响，采用PEB I网格技术，给出了在PEB I网格下油水两相流动控制方程的离散形式，并耦合了井筒存储和表皮系数公式，得到了压力降落数值试井问题的产量模型。

Chapter 2 is started from the basic theory of elastodynamics, the zero and the first order reflection and transmission coefficients of rough interface are derived in theory, and some numerical examples are given. Also dispersion characters of diffraction waves are discussed in the case of micro-rough interface in deep layers.

第二章从弹性动力学的基本理论出发，通过求解波动方程的定解问题，从理论上导出了地震波在粗糙界面上的零阶和一阶反射透射系数，并给出了数值算例；该章还讨论了深层微粗糙界面的绕射波的频散特征。

A numerical method of solving 2-D inverse problem of determining coefficients in elliptic equations is studied.

本文讨论了二维的决定椭圆型方程系数反问题的数值求解方法。

A new mixed finite element method for an elliptic problem with degenerate coefficients is presented.

对一个具有退化系数的椭圆问题提出了一种新的混合有限元法。

As the economic and social development, food gradually weakened, the Engel index has been developed areas to relatively low levels.

而随着社会经济的发展，食品问题逐步淡化，发达地区的恩格尔系数已经降到相当低的程度。

The applicability of Engel coefficient in China is an important academic topic.

摘要恩格尔系数在我国的适用性问题是学术界重要议题之一。

This method solves the problems of choosing coefficient matrices, and it does not need to satisfy a terminal state equality constraint. A PL system example shows that the method is valid and feasible.

该方法解决了系数矩阵的选择问题，不需要满足最终状态等式约束一个分段线性系统的实例证明了该方法是可行的。

The nonlinear equation of heat conduction is transformed into a Laplace′s equation by applying the Kirchhoff transformation ,and an analytic approximate solution of the equation is derived.

当介质的导热系数是温度的函数时，热传导方程是非线性偏微分方程，作者采用基尔霍夫变换把它变成拉普拉斯方程，于是可以找到原问题的近似解析解。

In this paper, some researches on estimator of parameters in the growth curve model are considered.

本文主要研究了生长曲线模型中回归系数的参数估计问题。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。