Based on the Volume of Fluid Method, the wave damping absorber of the numerical wave flume for irregular waves has been investigated. Setting the Turbulence motion equation and the Renault equation as the governing equations and using the wall function technique in the near-wall region, an absorbing wave-maker is set at the left side of the flume.

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With the algebraic result in form of piecewise function expressions, the excitation and propagation processes of stress waves, including the longitudinal wave, the transverse wave, and Rayleigh-wave, are discussed in detail.

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PartⅡ,Applying the developed and extended direct algebraic methods that presented in recent years and based on the 2+1 dimensional variable separation solutions,abundant Jacobi elliptic function doubly periodic waves and periodic propagating wave patterns for many 2+1 dimensional nonlinear wave models are obtained,and in long wave limit solitary waves are derived as well.

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Nonlinear flexural wave equation is solved by the Jacobi elliptic function expansion method. Two kinds of exact periodic solutions of the nonlinear equations are obtained, that is, the shock wave solution and the solitary wave solution. The necessary condition for existence of exact periodic solutions, shock solution and solitary solution is discussed, which is consistent with the qualitative analysis.

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Using algebraic methods which include extended Tanh-method,some new solitary solutions to the DBM and Log-DBM equation,such as singular solitary solutions,double singular peakon solitary wave solutions,double solitary wave solution with peakon and singular periodic solitary wave solutions are obtained..With the aid of an auxilitary function combined with the elliptic integral of the first kind,periodic solitary solution,singular and periodic singular solitary solutions can be obtained.

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The other function is to wave, sine wave and triangular wave statistical analysis.

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The structure beam response control method based on the traveling wave model was discussed theoretically. The theoretical traveling wave model was applied to a long thin beam with piezocrystal actuators and the traveling wave active control law for the condition of making measurement upstream and performing control downstream was derived and the control compensator formula of the flexural waveguide in the form of transcendental function was deduced.

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Regarding to the Mechanical wave on Physics teaching, the traditional method usually fail to offer a direct and clear description and demonstration on the effectiveness of Mechanical wave, for this reason the MathCAD software has been adopted, with the various functions the MathCAD software offers, such as calculation, function chart drawing and cartoon designing, men can describe and demonstrate exactly how the Mechanical wave transmits, intervenes and superposes, and define and research the Doppler effect.

物理學(xué)在處理機(jī)械波的教學(xué)過(guò)程中，傳統(tǒng)方法讀其現(xiàn)象的描繪和演示不直觀也不方便玖玖网在线视频，現(xiàn)利用MathCAD提供的強(qiáng)大數(shù)值計(jì)算性爱视频在线欧美、函數(shù)圖像創(chuàng)建和快速靈活的動(dòng)畫(huà)設(shè)計(jì)功能對(duì)機(jī)械波的傳播、干涉和迭加進(jìn)行了精確描述和動(dòng)畫(huà)演示黄色网站拍拍，并對(duì)阻尼

In this paper an algorithm of finite element modelling is discussed for elastic wave propagating in two dimensional media. Two analytical formulas of the initial motion and wave form of P wave are derived in time domain for a point force source directing vertically down as a function of time with a bell shape.

本文討論了二維介質(zhì)中彈性波有限元模擬的一種方法www.日本免费看；導(dǎo)出了二維無(wú)界空間中集中力點(diǎn)源的理論初動(dòng)表達(dá)式和位移波形表達(dá)式，并和相似情況下的有限元結(jié)果進(jìn)行了比較亚洲日韩一区二区在线视频；對(duì)用有限元方法算得的幾個(gè)中小模型的節(jié)點(diǎn)位移進(jìn)行了分析久久又99精品。

Under certain ratio of signal-to-noise and through the computer simulations and calculations, the performances in Mbius digital base band communication system of five often used modem function set, those are the even and odd symmetrical triangle wave, even and odd symmetrical square wave and saw-tooth wave and their inverse transforms, are simulated 10000 times, and the fluctuation ranges of the error rate P(subscript b are observed.

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