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In this topic, the dynamic analysis methods for piezoelectric vibrator are studied systematically based on the theoretical model, FEM numerical experimentation and FEM governing equation for given compound-mode vibrator, and some valuable conclusions are obtained. The main work accomplished is summarized as follows: 1.Elaborate the main modeling methods for piezoelectric vibrator and the significance and necessity to study the dynamic characteristics of piezoelectric vibrator which emphasize the urgency of this paper. 2.Take the bending deformation induced by piezoelectric ceramic as example, the energy transfer mechanism of electric energy to mechanical energy are analyzed; the motion and force transfer mechanism are analyzed for the longitudinal-bending vibrator. 3.Based on mode assumption and Hamilton principle, the coupling model of piezoelectric vibrator of linear USM is built; moreover, the equivalent circuit model is obtained and a coupling equation represents the relation between electric parameters and mechanical parameters is derived which provides foundation to match the vibrator and driving circuit. 4.Combine the constitutive equation of piezoelectric ceramic with elastic-dynamical equation, geometric equation in force field and the Maxwell equation in electric field and the corresponding boundary condition equation, the FEM control equation for piezoelectric vibrator of USM to solve dynamic electro-mechanical coupling field is established by employing the principle of virtual displacement. The equation lays the foundation to study the non-linear constitutive equation of piezoelectric ceramic driven by high-power. 5.Define the dynamic indexes of characteristic of vibrator and carry out variable parameters simulation by calculating the model parameters and the electric characteristics of vibrator are simulated according to the equivalent circuit model. By numerical experimentation, the working mode of vibration of vibrator and the shock excitation results of the working frequency band which provides the mode frequency to realize bimodal are analyzed. Detailed calculation of the electro-mechanical coupling field parameters is made by programming the FEM control equation.

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如果您正在尋找一個(gè)更詳盡的計(jì)劃日韩高清视频在免费线，對音樂的認(rèn)識免费在线观看青春草，了解我們的widi識別系統(tǒng)專業(yè)影院理伦。

The aim of this study is to further elaborate upon the complex Seediq pronominal system.

本研究的目的希望能更進(jìn)一步說明復(fù)雜的賽德克語代名詞系統(tǒng)。

The prayers are longer, the ceremonies have become more elaborate, incense is used continually, and the preparation is already on the way to become the complicated service of the Byzantine Prothesis.

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He proposed an elaborate program of public works.

他提出了一個(gè)周密的公共工程計(jì)劃99在线精品免费视频。

This article according to summarize the phenomenon of corruption of power, elaborate its existing manifestation, character and performing, and explore how and why it pullulate and reveal its harmfulness to society, for the purpose of putting forward countermeasure to resolve it.

本文旨在通過對權(quán)力腐敗現(xiàn)象的研究分析，歸納了現(xiàn)階段我國權(quán)力腐敗表現(xiàn)形式黄页网站欧美在线观看免费、特點(diǎn)和運(yùn)行規(guī)律哦美黄色视频，尋找出當(dāng)前我國權(quán)力腐敗的根源，揭露權(quán)力腐敗的社會危害性精品自拍偷拍，提出治理權(quán)力腐敗的治理對策人人干人人插吧高潮。

"Change " is " Wen Xindiao dragon " in an important academic category, different investigator is having each not identical understanding to this, but be opposite of this concept elaborate on very punch-drunk.

梗概： "通變"是《文心雕龍》中一個(gè)重要的理論范疇，不同的探究者對此有著各不相同的理解毛片最新网址发布页，但在對這個(gè)概念的闡述上都很模糊不清亚洲免费一级视频。

A great cultural heritage is a living memory. Moreover, traditional Chinese elaborate-style painting and ink-wash painting can arouse incredible responses in the hearts of these outsiders who are familiar with Chinese art tradition because of their graceful and profound performance. Such response is the joint product of aesthetic ideal and material quality. The form is sometimes the content, which are purely inseparable.

一種偉大的文化遺跡是活的記憶，包括在熟悉中國藝術(shù)傳統(tǒng)的外人心中yw193.com，中國傳統(tǒng)工筆和水墨因爲(wèi)其優(yōu)美深邃的表現(xiàn)国产三级手机在线观看，能夠引起妙不可言的反響，這種反應(yīng)是由審美理想和材質(zhì)共同作用的国产在线永久免费，形式有時(shí)就是它的內(nèi)容国产精选视频一区，是不好割離的。

More elaborate and magnificent still were the great triennial and quinquennial feasts given by the king to his ghostly ancestors.

更詳細(xì)和宏偉的仍然是偉大的三年期和五年期節(jié)日所給予他的國王幽靈的祖先人人操人人捖人人看。