振动型

Based on the fundamental theory of impulsive differential systems, employing Green formula, Gauss divergence theorem, Jensen inequality and Gronwall-Bellman inequality with impulse, we discuss the oscillation of impulsive partial differential systems by adopting reduction to absurdity and the stability in via of comparison theorem, respectively. Especially, we take an in-depth study on the oscillation of neutral impulsive parabolic systems and the stability of a class of nonlinear impulsive partial differential equations and obtain some useful conclusions.

本学位论文以脉冲微分系统基本理论为基础，利用反证法的分析方法和比较定理，结合Green公式、Gauss散度定理、Jensen不等式、含脉冲的Gronwall-Bellman不等式以及相关数学工具研究了脉冲偏微分系统的振动理论和稳定性理论，特别对中立型脉冲时滞抛物系统的振动性和一类非线性脉冲偏微分系统的稳定性作了较为深入的研究，给出了一些有用的结论。

In chapter 2 we obtain existence and joint continuity of the local time foradditive Lévy process under some conditions and discuss the upper bounds andlower bounds for the Holder laws of local times processes,the probability of somerare events ralated to small fluctuation of the sample functions and sojourn times insmall balls.Finally some liminf's results about the local and uniform oscillationsof additive stable process are acquired.

第二章给出了可加Lévy过程的局部时存在和联合连续的条件，讨论了其局部时过程的〓律上界和下界，以及可加Lévy stable过程跟样本函数局部振动相关事件的概率和停留在小球上的逗留时问题，同时对可加Lévy stable过程的样本轨道的局部和一致振动证明了一些liminf型结果。

The relation between the result accuracy and the element number of the system is studied and shows the minimal element number to ensure the response result accuracy is determined by the excitation frequency and the modal modes of the system.

研究指出，保证计算结果精确性的最小网格划分数目与激励频率及管道系统的振动模态有很大关系，即由对管系响应贡献较大的最高阶模态振型决定，这一研究成果对实际管道系统振动响应计算中时间与空间节点的划分提供了理论依据。

The natural frequencies, the equation of motion and the node of vibration are discussed for the vibration system of a cradle dynamic balancing machine. Some general remarks concerning the design are make. An analysis by the method of four measuring plane are given together with the actual electric circuits. Furthermore, the general ideas about the KQD-1 type cra-dle dynamic balancing machine are introduced as an example.

本文讨论了框架式动平衡机振动系统的自然频率运动方程、振动中心等问题；指出设计时应注意的事项，对四测量平面法作了理论分析，并给出其实际电路：以KQD—1型框架式动平衡机为实例作简要的介绍。

Some sufficient conditions for oscillation of neutral differential equation with positive and negative coefficients are obtained.

利用数学分析和不动点原理，研究了具有正负系数的中立型时滞微分方程的振动性，得到了方程所有解振动的充分条件。

By the finite element method model, Natural frequency and vibration model of some project fin-stabilitde sabot-discarded penetrator during launching are calculated and analyzed.

利用建立的三维有限元模型，计算分析了30阶尾翼稳定脱壳穿甲弹的振动固有特性，得到了各阶振动的固有频率及响应振型。

This dissertation researches in the vibrant clipped data of a plane, proposes regression analysis, BP learning algorithm and cubic spline interpolation to forecast the clipped data.

以国产某型无人机空飞时振动传感器测得的振动削波数据为研究对象，选用回归分析法、BP神经网络法和三次样条插值法对削波数据进行预测恢复。

Programs, AFITA and SHET, are developed, which can be used to compute the critical velocity for straight tube arrays and U-tube arrays of all sorts of tube arrangements in uniform and non—uniform flow and to calculate the response of tube due to flow induced vibration.

6开发了软件AFITA、SHET，能进行三角形、矩形排列的U型管和直管管阵、均匀流和非均匀流的临界流速分析，单根管自由振动和湍流诱发振动分析。

Secondly, the cutter of the machine was studied from reducing vibration, emphasis on knives array, homeostasis. To apply "ANSYS"method, At the same time, it was known that inherent frequency of the main axis was so far higher than vibratory frequency, and the machine main axis'rotational speed won't cause sympathetic vibration.

其次，本文从减少振动入手对9LRZ-80型秸秆揉切机的关键部件切碎器进行分析，着重对动刀片的排列、动平衡等进行分析研究，并通过有限元分析，得到切碎器主轴固有频率远远大于机器振动频率，机具的转速不会造成共振的危害。

The calculations of torsional vibration of crankshaft systems of 12V240ZJ6E diesel engines were carried out with TVCA programme and I deas software to obtain system natural vibration frequencies, vibration amplitudes of various concentric masses at different rotational speeds, and torques and torsional stress es of various crankshaft sections at different rotational speeds.

运用TVCA程序和Ⅰ deas软件对 12V2 4 0ZJ6E型柴油机轴系的扭转振动进行计算，求出系统的自振频率、各集中质量在不同转速下的振幅和各轴段在不同转速下的扭矩、扭转应力值，对自振频率、自由端振幅和扭转应力最大轴段进行了分析，对轴系的扭转振动情况作出总结与评

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。