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This project mainly dealt with the existence and multiplicity of periodic solutions and the boundedness of solutions of nonlinear oscillations.

本项目主要研究非线性振动中周期解的存在性、多解性及解的有界性、无界性。

Clearance ; vibro-impact ; periodic motion ; stability ; codimension two bifurcation ; chaos

间隙;冲击振动;周期运动;稳定性;余维二分岔;混沌

A theoretical description of the deformed state of QCs requires a combined consideration of interrelated phonon and phason field. The phonon field describes the motion of lattices in physical space, while the phason field describes the quasiperiodic arrangement of atoms in the complementary orthogonal space, which interact with one another. Owing to the existence of phason field, the elasticity of QCs is more complex than that of the conventional crystals.

准晶弹性的刻画不仅需要描写晶格振动的声子场,还需要刻画原子准周期排列的相位子场,而且二者是相互耦合的,所以准晶的弹性较经典的一般晶体的弹性复杂的多。

Limit cycle flutter of a two-dimensional airfoil in cubic nonlinear aeroelastic system in incompressible flow is investigated.

引 言 在不可压缩流中的二元机翼是一个典型的自激振动的例子,在该系统中引入非线性项一般会产生如Hopf分岔,极限环颤振[1],周期倍化及混沌等现象。

It can be concluded that the feature of position curve of water in jig is the same as the curve of typical damped vibration. In the equations the motion parameters of water in jig, such as velocity, acceleration, force etc. are in a direct proportion to the air pressure, and have a definite non-linear relationship with jigging cycle, thickness, and mobility of jig bed.

结果表明,水流运动的位移曲线特性符合阻尼强迫振动规律,水流运动的位移、速度、加速度、受力、动能等运动参数与跳汰机风压有直接的线性关系,与跳汰周期、阻力、床层松散度等跳汰参数有明确的非线性关系。

First of all, the method of Fredholm alternative is used to obtain the approximate solution of the first order for the bifurcating periodic solutions of a nonlinear system with delayed velocity feedback. The bifurcation direction and the stability of the bifurcating periodic solution are also determined.

首先,用Fredholm择一方法分析了一具有时滞速度反馈的非线性振动系统的Hopf分叉,得到了局部分叉周期解的近似表达式,确定了分叉解的分叉方向及稳定性。

Two harmonically excited systems with symmetrical rigid constraints are considered.

研究了两类含对称刚性约束振动系统的周期运动和分岔。

During the plate vibrationcourse , angular point generate the homologize periodic change counterforce .

在板振动过程中,柱支角点要产生相应周期变化支反力。

In this paper, we consider neutral functional differential equations and study the global existence of their solutions, stable subspaces and unstable subspaces of linear autonomous dynamical systems, local stable manifolds and local unstable manifolds of near hyperbolic equilibrium point of nonlinear autonomous dynamical systems, periodic solutions and oscillation of the neutral equations.

本文主要研究中立型泛函微分方程解的整体存在性,自治线性动力系统的稳定子空间与不稳定子空间、自治非线性动力系统在双曲平衡点的局部稳定流与局部不稳定流,周期解与解的振动性。

The appropriate sound vibration complex is major cycle.

RA :我是拉。适当的声音振动复合体是主周期。

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In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国,慢性酒精中毒,肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题,你可以随时联系我。

Very pretty, but the airport looks more fascinating The other party wisecracked.

很漂亮,不过停机坪更迷人。那人俏皮地答道。