摘要：Anterior cruciate ligament(ACL)injuries of the knee are one of the most common and serious athletic *** widely used cortical suspension fixation buttons for ligament reconstruction are permanent implants,particularly those made from conventional steel or titanium *** this study,a biodegradable Zn-0.45Mn-0.2Mg(ZMM42)alloy with the yield strength of 300.4 MPa and tensile strength of 329.8 MPa was prepared through hot *** use of zinc alloys in the preparation of cortical suspension fixation buttons was proposed for the first *** 35 d of immersion in simulated body fluids,the ZMM42 alloy fixation buttons were degraded at a rate of 44μm/a,and the fixation strength was retained(379.55 N)in the traction ***,the ZMM42 alloy fixation buttons exhibited an increase in MC3T3-E1 cell viability and high antibacterial activity against Escherichia coli and Staphylococcus *** results reveal the potential of biodegradable zinc alloys for use as ligament reconstruction materials and for developing diverse zinc alloy cortical suspension fixation devices.

摘要：大规模自然灾害发生后,极易出现多地同时提出多类型资源需求的局面.基于灾后应急资源调度的特点,建立了考虑多需求点、多供应点、多资源类型、且多个资源供应点能为多个资源需求点协同配备资源的多目标优化调度模型.模型中对调度路线的可靠度进行了考虑,增强了实用性.设计了求解模型的多蚁群优化算法,在全局信息素更新规则中引入精英策略,指导多蚁群间相互交换与共享信息,加快全局非劣解搜索效率.多目标多蚁群优化算法将资源定位配置与路线安排问题进行了集成解决.算例分析表明该算法能够很好地处理大型复杂网络.