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用于通信网阻塞控制的信度网模型 被引量:1
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作者 王宽全 《计算机科学》 CSCD 北大核心 1999年第1期41-45,17,共6页
1.引言阻塞是通信网中的一种常见现象。网络由于信息流特性的可变性和网络结点的特性,使得信息在通过结点时产生滞留现象,从而造成信息的时延增大和信息丢失率上升。这种由于网络结点吞吐率下降而引起的信息聚集于一些结点的缓冲区中,... 1.引言阻塞是通信网中的一种常见现象。网络由于信息流特性的可变性和网络结点的特性,使得信息在通过结点时产生滞留现象,从而造成信息的时延增大和信息丢失率上升。这种由于网络结点吞吐率下降而引起的信息聚集于一些结点的缓冲区中,网络时延极大增加的现象即为网络的阻塞现象。当网络中一个结点处于阻塞状态。 展开更多
关键词 通信 阻塞控制 信度网模型 专家系统
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Hyperresolution information and hyperresolution ignorance in modelling the hydrology of the land surface 被引量:6
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作者 Keith BEVEN Hannah CLOKE +2 位作者 Florian PAPPENBERGER Rob LAMB Neil HUNTER 《Science China Earth Sciences》 SCIE EI CAS CSCD 2015年第1期25-35,共11页
There is a strong drive towards hyperresolution earth system models in order to resolve finer scales of motion in the atmosphere.The problem of obtaining more realistic representation of terrestrial fluxes of heat and... There is a strong drive towards hyperresolution earth system models in order to resolve finer scales of motion in the atmosphere.The problem of obtaining more realistic representation of terrestrial fluxes of heat and water,however,is not just a problem of moving to hyperresolution grid scales.It is much more a question of a lack of knowledge about the parameterisation of processes at whatever grid scale is being used for a wider modelling problem.Hyperresolution grid scales cannot alone solve the problem of this hyperresolution ignorance.This paper discusses these issues in more detail with specific reference to land surface parameterisations and flood inundation models.The importance of making local hyperresolution model predictions available for evaluation by local stakeholders is stressed.It is expected that this will be a major driving force for improving model performance in the future. 展开更多
关键词 hyperresolution models epistemic uncertainties models of everywhere communicating uncertainty flood risk
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