查询词典 nonlinear oscillations

The optical nonlinearities, including the nonlinear absorption, the nonlinear refraction and the third-order nonlinear polarizability of 2-(2′-hydroxyphenyl)benzothiazole in cyclohexane, have been investigated using a single-beam Z-scan technique.

以532 nm皮秒脉冲作泵浦光，采用单光束Z-扫描技术对具有激发态分子内质子转移效应的有机分子2-(2′-羟基苯基)苯并噻唑在其双光子吸收区的非线性光学特性进行了详细地研究。

Two kinds of manipulative methods are applied to heating furnace systems, they belong to classical PID ,nonlinear PID .From comparing with them,we can find that the nonlinear PID method which is presented by this paper, not only has the characteristic of high "robustness and adaptability" that nonlinear PID controller has,but also has higher corresponsive speed and shorter regulating time.

基于这种非线性PID，结合加热炉的特性，设计出了一种非线性PID控制器，并分别用普通PID、非线性PID对其控制，通过系统仿真比较发现，本文提出的非线性PID不仅具有高鲁棒性和适应性特点，同时使调节时间更短，响应速度更快。

The paper aim at the three-phase voltage source SPMW-inverter, which is applied in variable-speed wind turbines system, adopts the theory of nonlinear counterchange and nonlinear feedback, creates the three-phase voltage source PWM-inverter's nonlinear model, and deduces it's feedback linearization equation, consequently, the three-phase voltage source PWM-inverter active and reactive current decoupling control is proposed.

该文针对变速风力发电机组系统所用的三相电压型SPWM 逆变器，采用非线性变换和非线性反馈理论，建立了三相电压型 PWM 逆变器非线性数学模型，推导出其反馈线性化方程，从而得出三相电压型 PWM 逆变器有功电流和无功电流的解耦控制策略。

Based on the analysis of the process of free orthogonal metal cutting, the theory of elastic-plastic distortion and temperature field was discussed. Yield rule, intensify rule, fluxion rule, types of contact and diathermanous model of metal cutting were also analyzed detailedly. The FEA model of stress field and temperature field of free orthogonal metal cutting were established by the fundamental idea of FEA. State nonlinear, material nonlinear and geometry nonlinear thermal-stress coupling were analyzed by FEA technology. The separate criterion of chip and dispose of contact types were research emphatically.

本文在直角自由切削过程分析的基础上，讨论了金属切削过程中的弹塑性变形理论和温度场理论，详细分析了屈服准则、强化准则、流动准则、金属切削传热模型、接触类型等问题，并利用有限元的基本思想，建立了直角自由切削应力场和温度场的有限元模型，进行了状态非线性、材料非线性和几何非线性的热力耦合分析，重点研究了切屑分离标准的确定、表面接触类型的处理等问题。

In (1), the nonlinear function f is a known nonlinear continuous function of x , and the control gain g is a known nonlinear continuous and locally invertible function of x .

在（1）中， f是一个关于已知的非线性连续函数 x 的非线性函数，控制增益 g是关于 x 的已知的连续非线性的函数。

Nonlinear wave equation; nonlinear intensity; solitary wave solution; nonlinear differential-difference system; compacton; peakon; noncontinuous solitary solution; bifurcation

非线性波动方程；非线性强度；奇异孤立波；非线性微分—差分系统；紧孤立了；尖峰孤立子；不连续孤立波；分岔

In this paper, we study nonlinear perturbation analysis of mesoscale verticalcirculation and evolution equation by means of f plane, non-hydrostatic balance andfilter model. Outstanding nonlinear characteristic of mesoscale disturbance invertical direction, we obtain nonlinear symmetric disturbance equation anddisturbance amplitude s evolution equation by use of multi-scale and singularperturbation technique.

中文摘要：本文采用f平面、非静力平衡、滤声波模式，讨论了大气中尺度非线性动力学方程，通过尺度分析重点突出了扰动在垂直方向上的非线性特征，从而得到了对称扰动非线性方程，运用多重尺度方法和摄动分析讨论了对称扰动非线性重力惯性波的演化过程，得到非线性重力惯性波振幅演化服从广义的非线性Schrdinger方程。

In the third chapter, using the methods of nonlinear feedback functions and Lyapunov functions and combining analytical with numerical methods, the nonlinear feedback methods are introduced and the synchronizations of chaos in Hadley system of aerographs and LFRBM system of physics are realized. Some of nonlinear feedback functions are constructed.

第三章在介绍非线性反馈方法原理的基础上，应用非线性控制的基本思想及Lyapunov函数方法，将解析法与数值法相结合，分别对气象学中著名的Hadley环流和物理学中的LFRBM系统进行研究，找到了一类非线性反馈函数，实现了混沌自同步，并利用Mathematica软件进行仿真实验，数值结果说明了该方法的有效性。

There are many nonlinear factors, such as the flections and out of shape of the FMS axes, the gaps of the transmission fraction, that make the FMS to be nonlinear dynamic system. Those nonlinear factors reduce the performance level of the FMS.

随着飞行器的性能的提高，对飞行转台系统也提出了许多更高的技术要求，从国内外发展趋势来看，&高频响、高精度、高鲁棒性、高可靠性&是伺服转台系统主要性能指标和发展方向。

ABSTRACT Rough sea surfaces are formed with the interaction, which is nonlinear, of seasurface wind and gravity and surface-tension of sea water. Also nonlinear is the interaction of sea surfaces with electromagnetic waves. So nonlinear theory and method should be employed in the study of EM scattering from rough sea surfaces.

粗糙海面是在海面风、海水的重力和海水表面的张力的相互作用下形成的，这种相互作用是非线性的；电磁波照射到海面后，电磁波与海面的相互作用也是非线性的；因此采用非线性的理论和方法研究电磁波与海面的相互作用更能反映其物理本质。

Now she was hungry and angry.She began to smoulder.

现在她又饿又气，她开始流露难以抑制的怒火。

You have placed our iniquities before You, Our secret sins in the light of Your presence.

诗90：8 你将我们的罪孽摆在你面前、将我们的隐恶摆在你面光之中。