平稳的

The far field sound pressure levels of the cylindrical shell and spherical shell excited by an exterior point load are measured, and a good agreement between the theoretical results and the test results shows that the theoretical method and corresponding results in this dissertation are correct.

主要研究内容：(1)建立了考虑流固耦合作用并在流体流动条件下部分充液或者部分浸没圆柱壳体运动方程，应用波数域法和传递矩阵法得到了该类壳体振动响应的径向波数域速度，进而应用平稳相位法得到了该类壳体辐射声场的预估理论模型。

A new method of modal decomposition based on time-frequency filter is proposed in this paper.

应用非平稳信号的时频滤波进行多自由度时变线性系统的模态分解。

Mathematical model of non-stationary time series with finite length has to be studied for the theoretical studies.

在对茧丝纤度曲线的预测理论研究中，将不可避免地要研究有限长度非平稳时间序列的数学模型。

Therefore the emphasis of this task is to study auto-regressive model of non-stationary time series with finite length.

所以，有限长度非平稳时一间序列的自回归模型，是本课题理论研究的重点。

Size curves of cocoon filaments can be regarded as non-stationary time series with finite length varying at random.

摘要茧丝纤度曲线的预测研究茧丝纤度曲线可视为是长度有限且随机变动的非平稳时间序列。

The comprehensive track state managing method to reduce the rail cracks around the bolt holes is proposed based on the vehicle/track nonstationary random vibration analysis and the track transfer characteristic, and is further modified through the comprehensive dynamics experiment in a railway worksite and the rail strains analysis due to the rail-fishplate interaction and the compression of fishbolt to rail bolt hole.

基于轮轨非平稳随机振动分析和轨道动态传递特性研究结果，本文提出综合整治钢轨螺栓孔裂损的措施，并分析了钢轨鱼尾板联结和螺栓杆挤压造成的钢轨螺孔应变，结合现场轨道动力学试验，完善这些措施。

6"Ball cover, Features beauty,refinement; The precise step enters the electrical engineering to drive, go placidity,go to nicety;shift aptitude, Horizontal speed 0.5°/s---240°/s ,Vertical speed 0.5°/s---200°/s;Vertical running have function to "Auto-flip, 360°continous horizontal flip;Dome speedauto-shift--- The speed of housing become the zoom lens depth to increase its speed pro rata lower gradually, a little bit on guard function; Auto-focus,auto-iris,Tum to surge and lightning strike protector;Menu setup and control function,estate memory before break off electricity and auto-resume

6英寸球罩，外型美观、精巧；精密步进电机驱动，运转平稳，定位准确；智能变速，0.5°/S－240°/S水平变速，0.5°/S-200°/S垂直变速；垂直转动有"自动翻转"功能， 360度持续水平转动；云台速度自动调整—云台的速度随变焦镜头深度的增加其速度按比例逐渐降低，守望点功能；自动聚焦，自动光圈，内置浪涌及雷击保护装置；菜单设置及控制功能，断电前状态记忆及来电自动恢复功能；64个预置点

6"Ball cover, Features beauty,refinement; The precise step enters the electrical engineering to drive, go placidity,go to nicety;shift aptitude, Horizontal speed 0.5°/s---240°/s ,Vertical speed 0.5°/s---200°/s;Vertical running have function to "Auto-flip, 360°continous horizontal flip;Dome speed auto-shift--- The speed of housing become the zoom lens depth to increase its speed pro rata lower gradually, a little bit on guard function; Auto-focus,auto-iris,Tum to surge and lightning strike protector;Menu setup and control function,estate memory before break off electricity and auto-resume fuction in come to electricity; 64initialize spots,5 auto-patrol path;Contain multi-confer;485standard communcation interface;Function to give an alarm to linkage.

6英寸球罩，外型美观，精巧；精密步进电机驱动，运转平稳，定位准确；智能变速，0.5°/S-240°/S水平变速，0.5°/S-200°/S垂直变速；垂直转动有"自动翻转"功能， 360度持续水平转动；云台速度自动调整—云台的速度随变焦镜头深度的增加其速度按比例逐渐降低，守望点功能；自动聚焦，自动光圈，内置浪涌及雷击保护装置；菜单设置及控制功能，断电前状态记忆及来电自动恢复功能；64个预置点， 5条自动巡视路径；兼容多种协议；标准485通讯接口；报警联动功能。具有球机环境温度和摄像机角度数显功能。

The location of the metacenter is an indication of the stability of a floating body.

定倾中心的位置表明了这一浮体的平稳性

Wavelet transform is an analysis method for non-stationary signal ,which overcomes the disadvantages of traditional Fourier analysis.

小波变换是80年代末发展起来的一个处理非平稳信号的方法。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！