参数方程

In this paper,we mainly discuss inverse problems for ellipticpartial differential equations,and parameter inversion and free boundary problemin elliptic equations have been paid much attention to many scientists for a longtime.

我们主要讨论椭圆型偏微分方程中的反问题，而在椭圆型方程的反问题中参数反演及其自由边界问题一直受到人们的关注，本文主要从事这方面研究，全文分为两部分。

In this paper, a new computed framework of social rationality is constructed based on the principle of synergetic and point the physical significance of parameters. The authors shell parameter's computing divi...

基于协同学原理，指出模型的物理意义是系统的序参量，并将参数的计算分为 4步：近似线性化、确定序参量、使用支配原理建立微分方程和解微分方程。

We study the existence of nonlinear elliptic equation by variational method and critical point theory, combined with sub- and sup-solution method.

第二章我们考虑非线性椭圆方程和带有局部p-凹凸非线性项的p-Laplace方程解的存在性，其中λ是正参数，0＜p＜1＜q。

A set of formula of conical surface double enveloping worm gearing had been derived and its figures,posi- tion and distribution had been depicted by graphs.

推导了锥面二次包络圆柱蜗杆传动过程中的啮合方程和主要啮合性能指标方程，以图表表示出在不同参数下其接触线、啮合界限线、根切界限线的分布图，对此种蜗杆副在砂轮的不同半径下的啮合特性进行了比较，为这类蜗杆传动中蜗轮滚刀的设计制造提供了理论基础。

A constant in an equation that varies in other equations of the same general form, especially such a constant in the equation of a curve or surface that can be varied to represent a family of curves or surfaces.

参数，参量在相同一般类型的等式中取值变化的等式中的常数或常量，尤其是曲线方程和平面方程中能代表一类曲线或平面的常量

For this metric, the field equations can be reduced to the Ernst equation with the parameter.

通过适当的手续，场方程化为带有参数的Ernst方程。

The error equation of the observer is transformed into state matrix according to the characteristics of the system. The parameters of the observer are designed using the eigenvalues of the matrix, and this idea is used to prove the stability of the system.

通过系统特性把观测器系统误差方程转换为状态矩阵方程的形式，根据矩阵特征值的特点设计观测器参数，并把这一思想用到观测器控制器系统的稳定性证明中。

The experimental results indicate that the particle size distribution has great influence on the attrition behavior of the catalysts tested, and a mixed attrition mechanism consisting of abrasion and fragmentation is identified for all the catalysts in terms of attrition loss rate evaluation, after-attrition morphology characterization and particle size distribution analysis. It is shown that the attrition of particles was found to evolute following Gwyn's kinetic model and the difference of attrition mechanism of various particles can be categorized with parameters of the Gwyn equation.

实验结果表明，不同粒径的催化剂颗粒具有不同的磨损行为；所有测试催化剂的磨损均由表面剥层磨损和体断裂磨损组成的混合磨损机制所支配；磨损的发展过程符合Gwyn磨损动力学方程，不同颗粒磨损规律的差别可由Gwyn方程的各参数来描述。

With the combination of the physical model based on excavation roadway during gas explosion,the gaseous phase detonation parameters are deduced on the conditions of the known gas congestion position,volume and concentration.

结合所建立的掘进巷道瓦斯爆炸的物理模型，当已知瓦斯聚积位置、体积和浓度时，利用Hugoniot方程和Rayleigh方程推导出了瓦斯爆轰参数的公式。

In the case ofreflectionlessness,after determining the gauge transformation,expressions of multi-soliton solutions of the L-L equation with an easy plane are obtained explicitly bysolving the linear algebraic equations with the aid of the well-known Binet-Canchyformula.

由于要克服因Jost解在参数趋于无穷时不独立于L-L方程的解的困难，必须引进规范变换，这是不涉及微分方程的Riemann问题方法无法解决的。

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。