房间空调逐时冷负荷两种计算方法的比较

比较了房间空调逐时冷负荷的两种计算方法——Z-传递函数法和辐射时间序列法。与Z-传递函数法相比,在将得热量的辐射部分转化为逐时冷负荷时,辐射时间序列法无需迭代,计算简便,而且辐射时间因子能反应围护结构的热响应特性,可作为评价围护结构蓄热能力的指标。推导了房间传递函数系数与辐射时间因子的关系式,可通过现有的ASHRAE房间传递函数系数数据库计算典型房间的辐射时间因子。

High Resolution Regional and Coastal Operational Storm Surges/Tide Forecasting System in Korea

This study was performed to compare storm surges/tide simulated by the regional and coastal storm surges/tide forecast system （RTSM （regional tide/storm surges model）, CTSM （coastal tide/storm surges model）） using two different inputs from weather models （RDAPS （Regional Data Assimilation and Prediction System） and KWRF （Korea Weather and Research Forecasting）） during two typhoons that occurred between 2007 and 2008. Both the RDAPS and KWRF are the operational weather forecasting system in KMA （Korea Meteorological Administration）. The horizontal resolutions of RDAPS and KWRF are 30 and 10 km, respectively. The storm surges/tide was hind casted using sea wind and pressure fields of two Typhoons which was approaching Korean Peninsula. The CTSM using input from KWRF simulate very well the storm surges/tide pattern in the complex coastal areas. The result showed that the storm surges by the coastal storm surges/tide model with high resolution input was in well agreement with the observed sea level occurred by high tide and storm surges in the coastal areas.

VHE下移动终端业务迁移的研究

在移动终端的业务实现过程中,存在业务的迁移问题,即如何在拜访网络不支持归属网络的某项业务时,为用户迁移并提供该业务。将业务按常用性分类并应用性迁移,可以在节省网络流量的同时有效降低业务响应时间。将此策略与目前已存在的用户入网后立即迁移业务和发起业务时再迁移两种策略进行了仿真测试比较,结果表明在用户集中或者分散发起业务时,这种应用性迁移方案均能有效缩短业务响应时间,对于业务迁移问题是行之有效的。