振子

In this paper,the characteristics of Duffing Oscillators are analyzed,the application of weak signal detection based on Duffing Oscillators is researched.

分析了Duffing振子的特性，研究了Duffing振子在微弱正弦信号检测中的应用。

The photographing system, which is composed of scattered laser light photographic system with diffused background and near-forward scattered laser light photographic system, give photos that can be used to study the microcharacter and macrocharacter of a liquid jet in detail.

根据研究需要，本文设计了以PZT-4压电陶瓷振子作为激励源，包括振子激励系统、光学拍摄系统、恒压单次喷射系统和数字图象采集与处理系统的实验装置。

A novel kind of rectangle column monopole antenna is presented.The equivalent diameter of the antenna is thick due to the double rectangular radiation plates connected with the metalized holes.

一种PCB柱形接地单极振子天线，通过利用PCB双面板的特性，制作出一个双面柱形振子天线，增加了天线的等效直径，展宽了天线的阻抗带宽。

The arc array transmitter is composed of many ceramic flexural vibrators which are arranged in an annulus. Directional radiation is realized by controlling the vibrating phase of each vibrator.

声波测井圆弧阵发射换能器由多个压电振子沿着圆周排列，通过控制各个振子的激励时间可以实现向某个方位方向的声波辐射。

Results show that the small vibration of this ideal model is non-simple harmonic,and the period of vibration in x direction and y direction are inverse ratio to the amplitude inverse ratio to the amplitude respectively,but influenced a little by them,and the waveform that coul.

本文应用拉格朗日方程方法研究了理想对称四弹性振子做二维运动的变化规律，得到其微小振动的控制方程，用数值解法求解出了振动方程，得到了振子运动的时程响应和轨迹图样。

This thesis performs deep and micromesh work in the key problems of chaotic oscillator detection system, which include analysis, output identification, noise immunity and constructive principle of chaotic oscillator detection system.

本文对混沌振子检测系统中的几个关键问题展开了深入和细致的研究，主要包括混沌振子检测系统的一些特性分析、输出判别、噪声的免疫特性、构成原理这几方面的问题。

This BALUN can effectively compensate the series reactances by introducing a shunt resonant circuit and thus achieve the maximum bandwidth of microstrip dipole antenna.

该BALUN引入一个并联谐振电路，可以有效补偿半波振子的串联电抗而实现微带半波振子带宽的最大化。

In summary, various key experimental conditions in electron acoustic imaging of ferroelectric domains were systematically studied. The optimum experimental conditions to obtain EAI of domains with good quality and the factors important to image analysis have been presented. The piezoelectric vibrator model and calculation of motion equation are helpful for explaining the imaging mechanism and related experimental phenomena. The sample holder with variable electric field was designed. The domain movement of BaTiO〓 ceramics and crystal under lateral and longitudinal applied electric field and domain movement of PMN-PT crystal under longitudinal poling electric field were observed. The application of SEAM on revealing of ferroelastic domains, imaging of residual stress distribution in ceramics coatings and around the pores on the surface of ferroelectric ceramic composite have been reported respectively. All these works enriched the study of electron acoustic imaging and extended the application of SEAM in the characterization of materials.

综上所述，本文系统地研究了各项关键实验条件对电畴电声成像的影响，指出了获得最佳畴结构电声像的条件和成像分析中应当考虑的各种影响因素；提出了解释电畴电声成像的压电振子模型，在此基础上推导并求解了压电振子运动方程，并对一些实验现象作出了解释；成功地设计了可变电场的样品台，观察了BaTiO〓陶瓷和晶体在横向电场作用下的畴运动，PMN-PT晶体在纵向极化电场作用下的畴运动；探索了电声显微镜在铁弹畴成像，陶瓷涂层应力观察，陶瓷自然表面气孔周围应力成像的应用，这些研究，丰富了电声成像的学术内涵，拓展了电声显微镜的应用领域。

At last, we study two physical models including coupled oscillators and damped oscillators.

最后，我们用变形量子化方法处理了两个应用广泛的物理模型—耦合振子和阻尼振子。

The author designed a spring-mass system combined with a Pendulum, and an Oil Damper was fixed to the mass.

在本章中，作者采用了在弹簧振子上伸出立柱悬挂吊摆的方案，并在振子上安装油阻尼器。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了