An integral connection exists among the mine production planning, the mined material destination, and the ultimate pit limit （UPL） in the mining engineering economy. This relation is reinforced by real information a...An integral connection exists among the mine production planning, the mined material destination, and the ultimate pit limit （UPL） in the mining engineering economy. This relation is reinforced by real information and the benefits it engenders in the mining economy. Hence, it is important to create optimizing algorithms to reduce the errors of economic calculations. In this work, a logical mathematical algorithm that considers the important designing parameters and the mining economy is proposed. This algorithm creates an optimizing repetitive process among different designing constituents and directs them into the maximum amount of the mine economical parameters. This process will produce the highest amount of ores and the highest degree of safety. The modeling produces a new relation between the concept of the cutoff grade, mine designing, and mine planning, and it provides the maximum benefit by calculating the destination of the ores. The proposed algorithm is evaluated in a real case study. The results show that the net present value of the mine production is increased by 3% compared to previous methods of production design and UPL.展开更多
城市绿色基础设施(Urban Green Infrastructure,UGI)的广泛应用,正在持续重塑全球城市景观,对城市生态系统服务产生重要影响。成都作为紧邻川西高原的内陆盆地城市,其城市景观在UGI构成的多样性等方面与中国其他城市具有显著差异。以成...城市绿色基础设施(Urban Green Infrastructure,UGI)的广泛应用,正在持续重塑全球城市景观,对城市生态系统服务产生重要影响。成都作为紧邻川西高原的内陆盆地城市,其城市景观在UGI构成的多样性等方面与中国其他城市具有显著差异。以成都城市景观为中心展开综合调查,使用地理信息系统、生态服务建模和空间分析来量化UGI对生态服务的影响,并采用系统化方法将UGI整合到优化城市生态系统服务的规划建议中,为快速城市化中的成都主城区UGI空间布局优化,特别是空间聚集程度冷点区域改善,提供具体的解决策略。总结出三个关键趋势:(1)成都市的土地利用发生了重大变化,以城市区域绿色空间的显著缩小和建设用地的显著扩大为特征,主要归因于人口增长和土地利用模式的变化;(2)空间聚集程度热点和冷点的调查分析显示,主城区大多数温度冷点位于成都的东部,而基于其价值的热点最高集中度位于南部地区;(3)对UGI内碳密度的分析显示,生态系统服务集中度的峰值出现在城市中心区域。展开更多
文摘An integral connection exists among the mine production planning, the mined material destination, and the ultimate pit limit （UPL） in the mining engineering economy. This relation is reinforced by real information and the benefits it engenders in the mining economy. Hence, it is important to create optimizing algorithms to reduce the errors of economic calculations. In this work, a logical mathematical algorithm that considers the important designing parameters and the mining economy is proposed. This algorithm creates an optimizing repetitive process among different designing constituents and directs them into the maximum amount of the mine economical parameters. This process will produce the highest amount of ores and the highest degree of safety. The modeling produces a new relation between the concept of the cutoff grade, mine designing, and mine planning, and it provides the maximum benefit by calculating the destination of the ores. The proposed algorithm is evaluated in a real case study. The results show that the net present value of the mine production is increased by 3% compared to previous methods of production design and UPL.
文摘城市绿色基础设施(Urban Green Infrastructure,UGI)的广泛应用,正在持续重塑全球城市景观,对城市生态系统服务产生重要影响。成都作为紧邻川西高原的内陆盆地城市,其城市景观在UGI构成的多样性等方面与中国其他城市具有显著差异。以成都城市景观为中心展开综合调查,使用地理信息系统、生态服务建模和空间分析来量化UGI对生态服务的影响,并采用系统化方法将UGI整合到优化城市生态系统服务的规划建议中,为快速城市化中的成都主城区UGI空间布局优化,特别是空间聚集程度冷点区域改善,提供具体的解决策略。总结出三个关键趋势:(1)成都市的土地利用发生了重大变化,以城市区域绿色空间的显著缩小和建设用地的显著扩大为特征,主要归因于人口增长和土地利用模式的变化;(2)空间聚集程度热点和冷点的调查分析显示,主城区大多数温度冷点位于成都的东部,而基于其价值的热点最高集中度位于南部地区;(3)对UGI内碳密度的分析显示,生态系统服务集中度的峰值出现在城市中心区域。
