本文在海-气-浪-沉积输运耦合模式COAWST(The Coupled-Ocean-Atmosphere-Wave-Sediment Transport Modeling System)中,添加包含海洋飞沫效应的拖曳系数CD和热焓交换系数CK参数化方案,探讨海洋飞沫的动力学和热力学效应对热带气旋的影...本文在海-气-浪-沉积输运耦合模式COAWST(The Coupled-Ocean-Atmosphere-Wave-Sediment Transport Modeling System)中,添加包含海洋飞沫效应的拖曳系数CD和热焓交换系数CK参数化方案,探讨海洋飞沫的动力学和热力学效应对热带气旋的影响。数值实验结果表明,海洋飞沫效应可有效改进热带气旋的路径模拟结果;只考虑海洋飞沫动力学效应时,对海表动量通量的影响甚少,可使向上感热通量和潜热通量略有增加;同时考虑海洋飞沫动力学和热力学效应时,可使海表动量通量略有增加,并使向上感热通量和潜热通量显著增加,海洋飞沫主要通过热力学效应有效增加热带气旋强度,对热带气旋强度模拟的改进效果相比于仅考虑海洋飞沫动力学效应更显著。展开更多
The circle geometric constraint model （CGCM） was put forward for resolving the open-pit mine ore-matching problems （OMOMP）. By adopting the approaches of graph theory, block model of blasted piles was abstracted i...The circle geometric constraint model （CGCM） was put forward for resolving the open-pit mine ore-matching problems （OMOMP）. By adopting the approaches of graph theory, block model of blasted piles was abstracted into a set of nodes and directed edges, which were connected together with other nodes in the range of circle constraints, to describe the mining sequence. Also, the constructing method of CGCM was introduced in detail. The algorithm of CGCM has been realized in the DIM1NE system, and applied to a short-term （5 d） program calculation for ore-matching of a cement limestone mine in Hebei Province, China. The applications show that CGCM can well describe the mining sequence of ore blocks and its mining geometric constraints in the process of mining blasted piles. This model, which is applicable for resolving OMOMP under complicated geometric constraints with accurate results, provides effective ways to solve the problems of open-pit ore-matching.展开更多
基于高分辨率的天气预报模式(Weather Research and Forecasting Model,WRF)与海洋环流模式(Hybrid Coordinate Oceanic Circulation Model,HYCOM)耦合数值模拟,对比观测台风最佳路径数据集和PISTON(Propagation of Intraseasonal Tropi...基于高分辨率的天气预报模式(Weather Research and Forecasting Model,WRF)与海洋环流模式(Hybrid Coordinate Oceanic Circulation Model,HYCOM)耦合数值模拟,对比观测台风最佳路径数据集和PISTON(Propagation of Intraseasonal Tropical Oscillations)项目提供的浮标观测数据,通过敏感性试验评估三种微物理参数化方案对1822号超强台风“山竹(Mangkhut)”的路径、强度演变和上层海洋响应的影响.研究表明:海-气耦合模式能在一定程度上模拟台风的移动路径与强度特征,但在台风初期会出现对强度的高估.还能模拟台风造成的海表面温度和盐度空间分布的不对称性.与浮标观测数据相比,海-气耦合模式会略高估海洋冷却与盐度的增加幅度.微物理参数化方案对Mangkhut的模拟有一定影响,Morrison方案对最低平均海平面气压和10 m高度处最大风速的模拟误差较WSM6与Thompson方案低,但该方案会高估海洋表层冷却,因而对Mangkhut成熟到衰减初期的风速模拟偏低. Morrison方案对三小时累积降水量的模拟在Mangkhut前期大于WSM6方案,中后期小于WSM6方案,而与Thompson方案相比,整体相差不大.微物理参数化方案对海洋表面对台风响应的模拟有一定影响,但敏感性有限.海洋表面的热盐变化同时与台风强度和移速有关,海表面温度和海表面盐度的变化幅度都随台风强度的增大而增大,随着台风移速的增大而减小,而台风的强度与移速对于海表响应的影响存在一定的相关性.展开更多
文摘本文在海-气-浪-沉积输运耦合模式COAWST(The Coupled-Ocean-Atmosphere-Wave-Sediment Transport Modeling System)中,添加包含海洋飞沫效应的拖曳系数CD和热焓交换系数CK参数化方案,探讨海洋飞沫的动力学和热力学效应对热带气旋的影响。数值实验结果表明,海洋飞沫效应可有效改进热带气旋的路径模拟结果;只考虑海洋飞沫动力学效应时,对海表动量通量的影响甚少,可使向上感热通量和潜热通量略有增加;同时考虑海洋飞沫动力学和热力学效应时,可使海表动量通量略有增加,并使向上感热通量和潜热通量显著增加,海洋飞沫主要通过热力学效应有效增加热带气旋强度,对热带气旋强度模拟的改进效果相比于仅考虑海洋飞沫动力学效应更显著。
基金Project(2011AA060407) supported by the National High Technology Research and Development Program of ChinaProject(51074073) supported by the National Natural Science Foundation of China
文摘The circle geometric constraint model （CGCM） was put forward for resolving the open-pit mine ore-matching problems （OMOMP）. By adopting the approaches of graph theory, block model of blasted piles was abstracted into a set of nodes and directed edges, which were connected together with other nodes in the range of circle constraints, to describe the mining sequence. Also, the constructing method of CGCM was introduced in detail. The algorithm of CGCM has been realized in the DIM1NE system, and applied to a short-term （5 d） program calculation for ore-matching of a cement limestone mine in Hebei Province, China. The applications show that CGCM can well describe the mining sequence of ore blocks and its mining geometric constraints in the process of mining blasted piles. This model, which is applicable for resolving OMOMP under complicated geometric constraints with accurate results, provides effective ways to solve the problems of open-pit ore-matching.
文摘基于高分辨率的天气预报模式(Weather Research and Forecasting Model,WRF)与海洋环流模式(Hybrid Coordinate Oceanic Circulation Model,HYCOM)耦合数值模拟,对比观测台风最佳路径数据集和PISTON(Propagation of Intraseasonal Tropical Oscillations)项目提供的浮标观测数据,通过敏感性试验评估三种微物理参数化方案对1822号超强台风“山竹(Mangkhut)”的路径、强度演变和上层海洋响应的影响.研究表明:海-气耦合模式能在一定程度上模拟台风的移动路径与强度特征,但在台风初期会出现对强度的高估.还能模拟台风造成的海表面温度和盐度空间分布的不对称性.与浮标观测数据相比,海-气耦合模式会略高估海洋冷却与盐度的增加幅度.微物理参数化方案对Mangkhut的模拟有一定影响,Morrison方案对最低平均海平面气压和10 m高度处最大风速的模拟误差较WSM6与Thompson方案低,但该方案会高估海洋表层冷却,因而对Mangkhut成熟到衰减初期的风速模拟偏低. Morrison方案对三小时累积降水量的模拟在Mangkhut前期大于WSM6方案,中后期小于WSM6方案,而与Thompson方案相比,整体相差不大.微物理参数化方案对海洋表面对台风响应的模拟有一定影响,但敏感性有限.海洋表面的热盐变化同时与台风强度和移速有关,海表面温度和海表面盐度的变化幅度都随台风强度的增大而增大,随着台风移速的增大而减小,而台风的强度与移速对于海表响应的影响存在一定的相关性.
