In the first edition, models initially developed to describe wave propagation in porous media saturated by heavy fluids are used to predict the acoustical performances of air saturated sound absorbing porous media. In this expanded and revised edition, we have retained, with slight modifications, most of the basic material of the first edition and expanded it by revisiting several original topics and adding new topics to integrate recent developments in the domain of wave propagation in porous media and practical numerical prediction methods that are widley used by researchers and engineers. Chapters 1 to 3 dealing with sound propagation in solids and fluid and Chapter 9 dealing with the modelling of perforated facings were slightly modified. Chapters 4 to 6 were greatly revisited. A more detailed description of sound propagation in cylindrical pores is presented (Chapter 4), related to the more general presentation of new parameters and new models for sound propagation in rigid-framed porous media (Chapter 5). Also in Chapter 5 a short presentation of homogenization, with some results concerning double porosity media, is added. In Chapter 6, different formulations of the Biot theory for poroelastic media are given, with a simplified version for the case of media with a limp frame. In Chapter 11 we have revisited the original representation of the modelling of layered media (Chapter 7 of the first edition) and extended it to cover the systematic modelling of layered media using the Transfer Matrix Method (TMM). In particular, a step by step presentation of the numerical implementation of the method is given with several application examples. Major additions include five new chapters. Chapter 7 discusses the acoustic field created by a point source above a rigid framed porous layer, with recent advances concerning the poles of the reflection coefficient and the reflected field at grazing incidence. Chapter 8 is concerned by the poroelastic layers excited by a point source in air or by a localized stress source on the free face of the layer, with a description of the Rayleigh waves and the resonances. Axisymmetrical poroelastic media are studied in Chapter 10. In Chapter 12, complements to the transfer matrix method are given. They concern mainly the effect of the finite lateral extend, and the excitation by point loads, of sound pack- ages. Several examples illustrating the practical importance of these extensions are given (e.g. size effects on the random incidence absorption and transmission loss of porous media; airborne vs. structure borne insertion loss of sound packages). In Chapter 13, an introduction to the finite element modelling of poroelastic media is presented. Emphasis is put on the use of the mixed displacement-pressure formulation of the Biot theory, xiv PREFACE TO THE SECOND EDITION which appears in the Appendix of Chap. 6. Detailed description of coupling conditions between various domains including a waveguide are presented together with sections on the breakdown of the power dissipation mechanisms within a porous media and radiation conditions. Several applications are chosen to illustrate the practical use of the presented methods including modelling of double porosity materials and smart foams. As in the first edition, the goal of the book remains to provide in a concrete manner a physical basis, as simple as possible, and the developments, analytical calculations and numerical methods, that will be useful in different fields where sound absorption and transmission and vibration damping by air saturated porous media are concerned.

如果您刚刚安装的操作系统，电脑上没有安装QQ影音、暴风等播放器的话，那么看DVD的时候用XP系统自带Windows Media Player 9不能播放出来，是吧，那就下载这个纯净的Windows Media Player 9 DVD解码器吧。 英文名：DVD Decoder Pak for Windows XP

BS ISO_IEC 23008-2-2015Information technology. High efficiency coding and media HEVC H.265

以找到各种H3C产品的图标。这些产品包括路由器、IPv6路由器、SOHO路由器、中低端路由器、核心路由器、普通路由器等。同时，还提供了竞争对手的路由器和VRP多功能路由平台的图标。用户只需将PPTX后缀改为ZIP或RAR解压，即可在解压出来的PPT文件夹中的media目录中找到所需的图标。

几种调用window media player方式.显示不一样。

计算机图形学英文教材,侧重理论与算法,浅显易懂,习题丰富,适合入门级学习

非官方的Windows Media Foundation示例 官样都可以和简要概述网页。 2020年9月更新：已在创建了一个新的官方Media Foundation样本存储库。 一组最小的示例应用程序，它们演示了如何使用Microsoft的Windows Media Foundation API的某些部分。 这些样本的最初动机是试图找到一种方法，以通过RTP从编码为H264和/或VP8的网络摄像头流式传输音频和视频，然后在远程目标上进行渲染。 截至2020年1月，MFWebCamRtp样本已用于将H264样本从网络摄像头源流式传输到ffplay。 渲染图 MFAudio-从扬声器上的文件播放音频。 MFAudioCaptureToSAR-在默认音频捕获设备（麦克风）上捕获并在默认音频输出设备（扬声器）上播放。 MFBitmapMftToEVR-对位图字节数组执行颜色转换，然后在增强

windows media player的详细使用！

Cannot resolve javax.media:jai_core:1.1.3（pdf文件转换为图片的依赖出错）

P2P媒体加载器 P2P Media Loader是一个开放源代码JavaScript库，它使用现代Web浏览器（即HTML5视频和WebRTC）的功能通过P2P传递媒体并通过与许多流行HTML5视频播放器集成来进行播放。 它不需要任何Web浏览器插件或插件即可运行（请参阅）。 它允许创建点对点网络（也称为P2P CDN或P2PTV），以便在通过HLS或MPEG-DASH协议实时观看同一媒体流或VOD的用户（对等）之间共享流量。 它可以大大减少传统的CDN流量和成本，同时将媒体流交付给更多用户。 相关项目 tracker-高性能WebTorrent跟踪器 -Web的流torrent客户端 有用的链接 API文档 JS CDN npm软件包 主要特点 通过HLS或MPEG-DASH协议支持实时和VOD流 支持多个HTML5视频播放器和引擎： 引擎：Hls.js，Shaka Player 视频播放器：JWPlayer，Clappr，Flowplayer，MediaElement，VideoJS，Plyr，DPlayer，Player.js等 支持HLS和MPEG-DASH协议