查询词典 hyperbolic

This process is modelled as a free boundary problem for a nonlinear system of hyperbolic differential equations, where the free boundary is the surface of the tumor.

上述过程可用一个双曲偏微分方程系统的自由边界问题来刻画，其中自由边界是肿瘤的表面。

Evolution system; hyperbolic type; solution; existence

发展系统；双曲型；发展方程；解；存在性

Transfer operator; Young's nonuniformly hyperbolic system; rational map; central limit theorem; large deviation

转移算子； Young非一致双曲系统；有理映射；中心极限定理；大偏差定理

Moreover, the life span of blow-up solution is estimated. Chapter4 is for the Cauchy problem of hyperbolic system with weak damping.

在第四章，我们研究一类弱阻尼非线性双曲型方程组的Cauchy问题。

Numerical experiments show that because Navier-Stokes equations at highReynolds number are a hyperbolic system,the boundary conditions are appli-cable to prescribe their boundary problems.

数值实验表明，在高Reynolds数下，由于Navier-Stokes方程呈现出很强的双曲型方程的性质，上述经过某些线性化处理得到的无反射边界条件是可以用来指定其边界值问题的。

The whole ticket hall is a roofing frame system of hyperbolic variable cross-section steel truss and monolayer steel net shell.

整个出发办票大厅为60米跨双曲变截面空间钢桁架和候机指廊，连廊的无拉杆相贯线单层钢网壳的屋面结构体系。

In the proof of the theorem we reduce theestimate of solutions to hyperbolic system to the corresponding case fora scalar pseudodifferential equation of the first order, then weestablish the required estimate by using microlocal analysis.

在定理的证明中我们将双曲组化到相应的一阶拟微分方程的情形，进而利用微局部分析建立所需要的估计。

A L(superscript ∞) bound estimate is provided on the solutions of a semi-linear parabolic system by the theory of phase transitions. The existence of solutions of corresponding hyperbolic system of conservation laws is studied by viscosity methods and compensated compactness framework.

讨论来源于物理相变理论的一类半线性抛物型方程组解的一致L估计，该结果是利用粘性法和补偿列紧框架研究相应的双曲型守恒律解的存在性的重要内容。

A L∞bound estimate is provided on the solutions of a semi-linear parabolic system by the theory of phase transitions.The existence of solutions of corresponding hyperbolic system of conservation laws is studied by viscosity methods and compensated compactness framework.

讨论来源于物理相变理论的一类半线性抛物型方程组解的一致L∞估计，该结果是利用粘性法和补偿列紧框架研究相应的双曲型守恒律解的存在性的重要内容。

Chapter 2 deals with some refinements of the central limit theorem for a class of non-uniformly hyperbolic dynamical systems called Youngs system, such as local central limit theorem and so-called Berry-Esseen theorem giving the rate of convergence in the central limit theorem.

在第二、三章中，我们考虑一类重要的非一致双曲动力系统的统计性质-中心极限定理，及其进一步的精细结果如局部中心极限定理，带有收敛速度的中心极限定理。

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。