目的:通过数学建模筛选医院病床有效安排方案,以提高科室病床利用效率,最大限度地满足病患的需求。方法:通过对某医院眼科床位实际利用数据的统计分析,利用了优化模型以及穷举遍历的方法,建立该科床位调配的优化模型,并利用Matlab编程...目的:通过数学建模筛选医院病床有效安排方案,以提高科室病床利用效率,最大限度地满足病患的需求。方法:通过对某医院眼科床位实际利用数据的统计分析,利用了优化模型以及穷举遍历的方法,建立该科床位调配的优化模型,并利用Matlab编程实现了模型自动模拟。结果:通过眼科数据的分析,得到了该科各病种床位占用特征,建立了眼科病床调配模型,筛选出眼科床位和手术安排最有效方案,结果显示该研究所取得的方案较FCFS(first come first serve)优。结论:该研究所建立的数学模型在医院床位有效安排方面具有较强的可操作性和实际意义,可以较大程度地改善医院的病床管理效率。展开更多
In Saint-Louis, Senegal, a constructed wetland with horizontal flow reed beds (FHa and FHb) has demonstrated significant efficacy in treating municipal wastewater. Analyzing various treatment stages, the system showed...In Saint-Louis, Senegal, a constructed wetland with horizontal flow reed beds (FHa and FHb) has demonstrated significant efficacy in treating municipal wastewater. Analyzing various treatment stages, the system showed only a slight temperature variation, from an influent average of 26.3°C to an effluent of 24.7°C. Electrical conductivity decreased from 1331 mS/cm to 974.5 mS/cm post-primary treatment, with suspended solids (SS) dramatically reduced from 718.9 mg/L to 5.7 mg/L in the final effluent. Biochemical oxygen demand (BOD5) and chemical oxygen demand (COD) saw a notable decrease, from initial levels of 655.6 mg/L and 1240 mg/L to 2.3 mg/L and 71.3 mg/L, respectively. Nitrogenous compounds (N-TN) and phosphates () also decreased significantly, indicating the system’s nutrient removal capacity. Microbiological analysis revealed a reduction in fecal coliforms from 7.5 Ulog/100ml to 1.8 Ulog/100ml and a complete elimination of helminth eggs. The presence of Phragmites and Typha was instrumental in enhancing these reductions. The system’s compliance with the Senegalese standards for disposal into natural environments, WHO recommendations for unrestricted water reuse in irrigation, and the European legislation for water reuse was established. The effluent quality met the stringent criteria for various classes of agricultural reuse, illustrating the system’s potential for sustainable water management. This wetland model presents a robust solution for water-stressed regions, ensuring environmental protection while supporting agricultural needs. The study calls for ongoing research to further refine the system for optimal, reliable wastewater treatment and water resource sustainability.展开更多
文摘目的:通过数学建模筛选医院病床有效安排方案,以提高科室病床利用效率,最大限度地满足病患的需求。方法:通过对某医院眼科床位实际利用数据的统计分析,利用了优化模型以及穷举遍历的方法,建立该科床位调配的优化模型,并利用Matlab编程实现了模型自动模拟。结果:通过眼科数据的分析,得到了该科各病种床位占用特征,建立了眼科病床调配模型,筛选出眼科床位和手术安排最有效方案,结果显示该研究所取得的方案较FCFS(first come first serve)优。结论:该研究所建立的数学模型在医院床位有效安排方面具有较强的可操作性和实际意义,可以较大程度地改善医院的病床管理效率。
文摘In Saint-Louis, Senegal, a constructed wetland with horizontal flow reed beds (FHa and FHb) has demonstrated significant efficacy in treating municipal wastewater. Analyzing various treatment stages, the system showed only a slight temperature variation, from an influent average of 26.3°C to an effluent of 24.7°C. Electrical conductivity decreased from 1331 mS/cm to 974.5 mS/cm post-primary treatment, with suspended solids (SS) dramatically reduced from 718.9 mg/L to 5.7 mg/L in the final effluent. Biochemical oxygen demand (BOD5) and chemical oxygen demand (COD) saw a notable decrease, from initial levels of 655.6 mg/L and 1240 mg/L to 2.3 mg/L and 71.3 mg/L, respectively. Nitrogenous compounds (N-TN) and phosphates () also decreased significantly, indicating the system’s nutrient removal capacity. Microbiological analysis revealed a reduction in fecal coliforms from 7.5 Ulog/100ml to 1.8 Ulog/100ml and a complete elimination of helminth eggs. The presence of Phragmites and Typha was instrumental in enhancing these reductions. The system’s compliance with the Senegalese standards for disposal into natural environments, WHO recommendations for unrestricted water reuse in irrigation, and the European legislation for water reuse was established. The effluent quality met the stringent criteria for various classes of agricultural reuse, illustrating the system’s potential for sustainable water management. This wetland model presents a robust solution for water-stressed regions, ensuring environmental protection while supporting agricultural needs. The study calls for ongoing research to further refine the system for optimal, reliable wastewater treatment and water resource sustainability.
