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非线性不稳定
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  nonlinear instability
     In this paper the evolution of the radiation field from frequency bifurcation to chaos and the temporal and frequency characteristics of the nonlinear unsteady states are investigated, based on the threshold analysis of nonlinear instability for the radiation field in a traveling wave tube amplifier.
     以行波管放大器中辐射场的非线性不稳定阈值分析为基础 ,对辐射场从频率分叉到混沌的演化过程和不同区域这些非线性不稳定态的时间特性和频率特性进行了研究 .
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     This thesis also describes and compares some significant TCP congestion control algorisms and Active Queue Management (AQM) strategies in detail, and introdeces some novel research methods and results in the stability analysis of Internet congestion control with the perspective of classic control system, modern control system and nonlinear instability phenomena.
     本文研究了几种主要的TCP拥塞控制算法以及主动队列管理策略,并阐述了从经典控制理论、现代控制理论和非线性不稳定现象的角度研究网络拥塞控制系统稳定性的一些最新研究方法和研究成果。
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     when the atmosphere system occurs nonlinear instability in the subcritical instability region, it will split more wave resolutions than in the supercritical instability region and need more time to occur the subcritical instability, therefore it may have effect on the form and development of some synoptic system.
     大气系统在亚临界不稳定区发生非线性不稳定时,会比超临界不稳定区分裂出更多的波动解,而且发生亚临界不稳定需要更长的时间,因此它可能在某些天气系统的形成和发展过程中起到一定的作用。
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     Based on a general discussion about the nonlinear instability characters of the basic state or the seasonal cycle of the climate system, this paper studies the nonlinear interaction between interannual variability (or rather the ENSO) and the seasonal cycle. Oxford model, a coupled air sea model, is employed to demonstrate this theoretical analysis.
     文中从理论上论述了气候系统的基本态—季节循环的非线性不稳定特征 ,研究了年际气候变率特别是ENSO与季节循环间非线性相互作用 ,并通过Oxford海 气耦合模式数值实验具体展示了上述理论分析。
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     The results show that the nonlinear instability of system can appear in certain parameter region.
     表明了在一定的条件下,系统将出现非线性不稳定,这构成了论文的第二章。
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  nonlinear unstable
     Oscillation of Higher Order Nonlinear Unstable Type Difference Equations
     高阶非线性不稳定型差分方程的振动性(英文)
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     A nonlinear evolution equation for the radiation field in magnetically insulated transmission line oscillator (MILO) is derived and the threshold conditions of the nonlinear unstable solution are studied.
     导出了磁绝缘传输线振荡器 (MILO)中辐射场的非线性演化方程 ,并讨论了在临界值点附近可能出现非线性不稳定解的条件。
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  “非线性不稳定”译为未确定词的双语例句
     In this paper,the authors consider the oscillation for m-order self-conjugate unstable difference equation|Δ(anΔm-1(yn+gnyn-τ)) |αsgnΔ(anΔm-1(yn+gnyn-τ)) =∑ki =1q(n,i)f(yσ(n,i))Some oscillatory criteria for all bounded solutions of the equation are given.
     考虑高阶非线性不稳定型差分方程k|Δ(anΔm-1(yn+gnyn-τ))|αsgnΔ(anΔm-1(yn+gnyn-τ))=∑i=1q(n,i)f(yσ(n,i))得出此方程有界解振动的若干判断准则.
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     Study on nonlinear increasing procedure of Rijke thermoacoustical instability
     Rijke管热声非线性不稳定增长过程的研究
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     Finite Element Solution for Transient Nonlinear Heat Conduction
     非线性不稳定导热的有限元素法
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     The double inverted pendulum system is a nonlinear and unstable control problem.
     二级倒立摆控制是一个异常复杂而又对准确性、快速性要求很高的非线性不稳定系统控制问题。
短句来源
     In control field, there are so many difficult problems to overcome in modeling and controller design for nonlinear and unstable systems, which makes it necessary to do research in the lab first.
     在控制领域中,非线性不稳定系统的建模和控制器的设计有许多需要克服的难点问题,有必要首先在实验室中研究。
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  nonlinear instability
Nonlinear instability of a thin cylindrical layer of liquid
      
Nonlinear instability of a spontaneously radiating shock wave
      
Nonlinear instability of a stratified-fluid layer of finite depth
      
In the second case, the nonlinear instability dynamics can only be studied numerically.
      
A numerical analysis of the nonlinear instability of shock waves is presented for solid deuterium and for a model medium described by a properly constructed equation of state.
      
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  nonlinear unstable
A nonlinear integral equation that describes the time evolution of the amplitude of a nonlinear unstable wave on the flat uniform charged surface of an ideal incompressible liquid has been derived and solved.
      
Optimal algorithms for solving nonlinear unstable problems
      
Small-scale experiments on layered media show highly nonlinear unstable snap-back phenomena and large rotations in the physical response.
      


A three-level filtered spectral forecast model including orography has been developed, using the difference method, vertically, the degradation of dimensionality, and a perfect spectral method latitudinally and pseudo-spectra] methods longitudinally. The wave numbers taken along the parallels and the meridians are 15 and 13 respectively. In time integration, the time step is taken as a function of wave number. Since September in 1974, a number of examples have been computed, with fairly good results.

文中,非线性项的处理用了变维方法,纬向的“完全的谱方法”及经向的“准谱方法”,既有利于克服非线性不稳定,且能大大节省计算量及存储量,使之能在小型计算机上实现其程序设计。通过设计多个地形曲面的办法来考虑地形的作用。在时间差分格式中,将时间步长取成波数的函数,有利于节省计算量。这模式从一九七四年九月开始进行了较多个例的预报实验,其72小时以内的预报效果是比较好的。

In this paper, a time integral scheme based on variational principle is preseh-ted. The dimensionless form of the primitive equations is taken into account and the sum of the kinetic and available potential energies is used as the variational constraint condition in order to prevent the nonlinear instablity during long-term numerical integration. The results are comparable with those used by other integral methods.

将正压原始方程组无量纲化以后,把量级近似相当的动能与有效位能之和守恒作为变分约束条件,有效地控制了非线性不稳定,使长时间积分中能保持总能量守恒。其结果可和其它积分方法相比。

Considering the effects of adhesive layers and filaments supporting the composite resonator on the measurement of the internal friction and modulus, the accurate expressions for the internal friction and elastic modulus have been obtained by solving the partial differential equations of the correlative variations of composite resonators. The additional internal friction due to adhesive layer is proportional to the product of square of amplitude of the strain in the layer and the internal friction of adhesive....

Considering the effects of adhesive layers and filaments supporting the composite resonator on the measurement of the internal friction and modulus, the accurate expressions for the internal friction and elastic modulus have been obtained by solving the partial differential equations of the correlative variations of composite resonators. The additional internal friction due to adhesive layer is proportional to the product of square of amplitude of the strain in the layer and the internal friction of adhesive. The internal friction owing to supporting filaments is found to be proportional to the internal frictions of specimen and of quartz resonator.

考虑了组合振子法测量内耗(Q~(-1))和弹性模量时粘结层和支持导线的效应。求解了描述组合振子耦合振动的联立偏微分方程组,得出了试样内耗和弹性模量的精确表达式。粘结层附加内耗与粘结层中应变振幅平方及其内耗乘积成正比。支持导线附加内耗正比于细丝内耗和试样内耗乘积。粘结层一般减小振子共振频率。解释了小内耗试样测量中观察到的由粘结层流变和开裂所造成的非线性不稳定背景内耗现象,例如多重共振峰、呼吸现象等。提出了用Marx法准确测量的有效措施。

 
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