摘要本文利用次线性项在零点附近的凹性和可积性，用移动平面法给出了一类次线性椭圆方程正解的对称性。
With the concavity and integrability of sublinear terms near zero, the symmetry results for a class of sublinear elliptic equations are given by making use of the moving-plane method.
结论三次项曲线对MTS法细胞毒试验的细胞数od关系有很高拟合度且优于线性曲线模型。
CONCLUSION For the relations of cell number-OD in MTS cytotoxicity assay, the fitness of cubic curves are better than the linear model.
证明了一类非线性项受幂函数控制的次线性分数微分方程的正解存在性。
The existence of positive solution is proved for a class of sublinear fractional differential equations where the nonlinear terms subject to the power functions.
在非线性偏微分方程中，根据弱可压缩液体的假设，忽略二次梯度项，在试井较长时间内将产生误差。
According to the assumption of slightly compressible fluid, neglected the quadratic gradient term in nonlinear partial differential equation is usually lead to error.
和线性热力学不同的是方程中含有高次项。
The equation is different from that of linear thermodynamics theory because of its high term.
二维平行壁面剪切流动进入混沌的现象可用含二次非线性项的强迫振动方程来描述。
The bifurcation and chaotic process of two-dimensional parallel wall shear flows are described by the forced oscillation equation containing a square nonlinear term.
线性回归模型的误差项不服从正态分布或存在多个离群点时，可以将残差秩次的某些函数作为权重引入估计模型来减少离群点的不良影响。
When multiple outliers occur in linear regression model or the distribution of residuals is not normal, we can use residuals rank as weight function to get some resist estimator.
这种方法同样也适用于求解具有更高次非线性项的其他非线性波方程。
This method used in the paper can be also be applied to other nonlinear wave equations with higher-order nonlinear terms.
另一方面又利用矩阵理论等推导出含有二次项的非线性函数的协方差传播公式的矩阵形式。
On the other hand, it also derives the covariance propagation formula of non-linear function containing quadratic term in matrix form using the matrix theory etc.
此方法同样适用于其他非线性方程，特别对那些带有高次非线性项的方程，该方法具有独特的优点。
The method in this paper can also be applied to other nonlinear equation. For those nonlinear equations with higher order nonlinear terms the method has its extraordinary advantages.
考虑了二次梯度项影响的非线性径向流动问题的无限大地层和有界地层渗流模型。
The models of the nonlinear radial flow for the infinite and finite reservoirs including a quadratic gradient term were presented.
本文研究了用与受迫力谐波共振的周期摄动抑制含二次非线性项受迫振动系统中的混沌。
In this paper, suppression of chaos in a forced vibration system with a square term by resonant periodic perturbations is studied.
本文给出了化不含平方项的两类特殊二次型为标准形的一种直接选取满秩线性变换法。
The paper teus a direct way to select nonsingular linear transformation by changing two special quadratic forms without square terms to the standard form.
用MLP方法求解一类同时具有二次和三次项的强非线性系统的自由振动问题，得到其二级近似解。
The Solutions of a kind of strongly nonlinear system with quadratic and cubic nonlinearities are derived by means of the MLP method, and its second order approximate solutions are obtained.
研究了具有三次非线性项的多阶梯梁的振动。
Vibrations of multiple stepped beams with cubic nonlinearities were considered.
考虑了二次梯度项的非线性双重介质模型。
A nonlinear dual-porosity model considering a quadratic gradient term is presented.
本文将非线性观测值函数泰勒级数展开，并取至二次项，得到线性一二次项形式。
This paper expands the non-linear observation function in Taylor's series, takes to the quadratic term and obtains the form of the linear-quadratic term.
该方程组不仅包含二次及三次非线性项，而且体现了参数激励与外激励的联合作用。
The equations of motion of beam, which includes not only quadratic and cubic nonlinearities but also parametric and forced excitations are derived using Kane's equation.
考虑一类对角型椭圆组，它的非线性项关于未知解的梯度为二次增长。
Consider an elliptic system in diagonal form of which the nonlinear terms are of quadratical growth respect to the gradient of the unknown solution.
本文仅就满足齐次线性递推关系序列，给出它一般项求法。
This Paper gives Only a method to find the general term u_n of a Sequences Which Satisfies homogeneous Linear recurrence relations.
线性方程中的所有项均为一次项。
All of the terms in a linear equation are of the first degree.
该方法对非齐次项属于该类函数的线性常微分方程行之有效。
This method is effective for linear ordinary differential equations whose non-homogeneous term belongs to the set described above.
本文研究找出一个已知的线性齐次递推数列的一般项的基础解组的问题。
This paper explores the problem of finding a fundamental system of solutions for the general term of a given linear homogeneous recursive sequence.
本文研究找出一个已知的线性齐次递推数列的一般项的基础解组的问题。
This paper explores the problem of finding a fundamental system of solutions for the general term of a given linear homogeneous recursive sequence.
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