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一种新的流媒体网络质量分析系统
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作者 钟开文 《电信快报(网络与通信)》 2010年第4期21-23,共3页
对基于WCDMA的流媒体关键问题进行分析和研究,针对流媒体业务中网络传输质量这一关键问题,给出了一种新的网络质量分析系统。该系统不仅能实时获取当前的网络情况,还能根据定量分析,实时地对编码端参数以及信道参数进行调整,使传输情况... 对基于WCDMA的流媒体关键问题进行分析和研究,针对流媒体业务中网络传输质量这一关键问题,给出了一种新的网络质量分析系统。该系统不仅能实时获取当前的网络情况,还能根据定量分析,实时地对编码端参数以及信道参数进行调整,使传输情况的变化不会严重影响流媒体业务感受。通过试验可以看出,该系统能很好地避免媒体流的丢包,能进行码率、分包大小的控制,使得流媒体传输更加顺畅。 展开更多
关键词 WCDMA 流媒体 信道监控 传输质量分析
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Mixed convective heat and mass transfer analysis for peristaltic transport in an asymmetric channel with Soret and Dufour effects 被引量:5
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作者 F.M.Abbasi A.Alsaedi T.Hayat 《Journal of Central South University》 SCIE EI CAS 2014年第12期4585-4591,共7页
The present investigation addresses the simultaneous effects of heat and mass transfer in the mixed convection peristaltic flow of viscous fluid in an asymmetric channel. The channel walls exhibit the convective bound... The present investigation addresses the simultaneous effects of heat and mass transfer in the mixed convection peristaltic flow of viscous fluid in an asymmetric channel. The channel walls exhibit the convective boundary conditions. In addition, the effects due to Soret and Dufour are taken into consideration. Resulting problems are solved for the series solutions. Numerical values of heat and mass transfer rates are displayed and studied. Results indicate that the concentration and temperature of the fluid increase whereas the mass transfer rate at the wall decreases with increase of the mass transfer Biot number. Furthermore, it is observed that the temperature decreases with the increase of the heat transfer Biot number. 展开更多
关键词 peristaltic transport heat and mass transfer Soret and Dufour effects convective boundary conditions
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Mass transfer analysis for microwave hot in-place recycling of asphalt pavements
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作者 Sun Tongsheng Shi Jinfei Tang Lingfeng 《High Technology Letters》 EI CAS 2012年第1期96-100,共5页
In order to realize mass transfer analysis for microwave hot in-place recycling of asphalt pavements, a volume element is established including asphalt mixtures, liquid water and vapor. A mass transfer control model i... In order to realize mass transfer analysis for microwave hot in-place recycling of asphalt pavements, a volume element is established including asphalt mixtures, liquid water and vapor. A mass transfer control model is built by the theory of multiphysics, phase transformation and diffusion. The model contains continuity equation, energy conservation equation, movement equation and vapor diffusion equation. To gain the solution of the mass transfer model, the formulas are simplified to one-dimensional differential equations. And then a mathematical model of boundary conditions is established. The mass transfer velocity and dissipative energy are obtained in different moisture contents through simulation of asphalt pavements recycling. The result indicates that when initial moisture content is certain, mass transfer velocity is almost uniform in depth direction at the same heating time and enertrv absorbed by water i,~ descendino with denletion of moisture. 展开更多
关键词 asphalt pavements mass transfer model mass transfer velocity energy absorption efficiency
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