基于内聚力单元法的船舶与重叠冰碰撞数值模拟研究（英文）

The gradual increase in shipping and drilling activities in the Arctic regions has resulted in the increased importance of studying the structural safety of polar ships in various ice conditions. Rafted ice refers to a type of accumulated and overlapped sea ice; it is driven by external forces, such as wind and waves, and may exert high loads on ships and threaten their structural safety. Therefore, the properties of rafted ice and the construction of numerical models should be studied before ex...     

磷受控对酿酒废水-微藻培育耦合体系的影响

为考察酿酒废水-微藻培育耦合体系的最适磷营养条件,对莱茵衣藻、二形栅藻在单一培养和共培养条件下的生长状况进行了观察,并剖析了对酿酒废水中营养盐的吸收去除效率. 采用控制变量法对酿酒废水总磷浓度进行调控,研究了不同磷浓度对微藻的干重、比生长速率、蛋白质含量,以及对总氮（total nitrogen,TN）、总磷（total phosphorus,TP）、化学需氧量（chemical oxygen demand,COD）去除量和去除效率的影响. 研究结果表明:莱茵衣藻对磷需求总体上大于二形栅藻对磷需求,当初始总磷浓度为16.40 mg/L,初始氮磷比为2.45时,莱茵衣藻最终生物量达到839.50 mg/L,藻蛋白含量达到53.37 mg/L,对TN、TP、COD的去除率分别为93.48%、91.75%、67.90%;二形栅藻生物量最高达到650.00 mg/L,藻蛋白含量达到131.04 mg/L,对TN、TP、COD的去除率分别为95.76%、73.93%、83.43%;而两种藻在共培养条件下,其生长曲线处于单一培养两种微藻下的生长曲线之间,TP、TN的去除率分别为83.66%、95.24%,COD的去除规律与二形栅藻类似. 研究发现酿酒废水-微藻培育耦合体系,无论是单一还是共培养体系,酿酒废水总体均能达到地表水环境质量标准（GB3838—2002）的Ⅳ类水总磷要求.