相比电动汽车(electricvehicle,EV)慢充用户,大规模、随机快充负荷的接入将会带来更加严重的电网安全运行问题。从整体社会经济效益最大化的角度出发,仅单纯从电网侧增加基础设施建设并非最佳解决之道,有必要从用户角度研究有效的调度...相比电动汽车(electricvehicle,EV)慢充用户,大规模、随机快充负荷的接入将会带来更加严重的电网安全运行问题。从整体社会经济效益最大化的角度出发,仅单纯从电网侧增加基础设施建设并非最佳解决之道,有必要从用户角度研究有效的调度策略对电动汽车的快充行为进行引导。为此,基于未来智慧城市的场景下,提出了基于节点关键度的配网供电电压偏差指标(voltage deviation index based on node importance,VDINI)的概念,指出动态调整快充站充电服务费的手段,分析电动汽车用户对于快充站选择行为的影响因素,建立电动汽车用户基于自身效益的充电位置决策模型,从而说明通过调整各充电服务费的来对快充行为进行引导的可行性。在此基础上,根据需要满足的各种约束条件,制定各快充站快充服务费的求解流程,在保证充电站效益不变的同时,将电动汽车合理地引导至各个快充站,均衡区域内的充电负荷,实现空间上的有序快充,改善了配网的电能质量。算例仿真验证了所提充电服务费制定方法的合理性以及快充负荷引导策略的优越性。展开更多
With the continuous development of digital medicine,minimally invasive precision and safety have become the primary development trends in hepatobiliary surgery.Due to the specificity and complexity of hepatobiliary su...With the continuous development of digital medicine,minimally invasive precision and safety have become the primary development trends in hepatobiliary surgery.Due to the specificity and complexity of hepatobiliary surgery,traditional preoperative imaging techniques such as computed tomography and magnetic resonance imaging cannot meet the need for identification of fine anatomical regions.Imaging-based three-dimensional(3D)reconstruction,virtual simulation of surgery and 3D printing optimize the surgical plan through preoperative assessment,improving the controllability and safety of intraoperative operations,and in difficult-to-reach areas of the posterior and superior liver,assistive robots reproduce the surgeon’s natural movements with stable cameras,reducing natural vibrations.Electromagnetic navigation in abdominal surgery solves the problem of conventional surgery still relying on direct visual observation or preoperative image assessment.We summarize and compare these recent trends in digital medical solutions for the future development and refinement of digital medicine in hepatobiliary surgery.展开更多
文摘相比电动汽车(electricvehicle,EV)慢充用户,大规模、随机快充负荷的接入将会带来更加严重的电网安全运行问题。从整体社会经济效益最大化的角度出发,仅单纯从电网侧增加基础设施建设并非最佳解决之道,有必要从用户角度研究有效的调度策略对电动汽车的快充行为进行引导。为此,基于未来智慧城市的场景下,提出了基于节点关键度的配网供电电压偏差指标(voltage deviation index based on node importance,VDINI)的概念,指出动态调整快充站充电服务费的手段,分析电动汽车用户对于快充站选择行为的影响因素,建立电动汽车用户基于自身效益的充电位置决策模型,从而说明通过调整各充电服务费的来对快充行为进行引导的可行性。在此基础上,根据需要满足的各种约束条件,制定各快充站快充服务费的求解流程,在保证充电站效益不变的同时,将电动汽车合理地引导至各个快充站,均衡区域内的充电负荷,实现空间上的有序快充,改善了配网的电能质量。算例仿真验证了所提充电服务费制定方法的合理性以及快充负荷引导策略的优越性。
基金Supported by National Natural Science Foundation of China,No.82070638 and No.81770621and JSPS KAKENHI,No.JP18H02866.
文摘With the continuous development of digital medicine,minimally invasive precision and safety have become the primary development trends in hepatobiliary surgery.Due to the specificity and complexity of hepatobiliary surgery,traditional preoperative imaging techniques such as computed tomography and magnetic resonance imaging cannot meet the need for identification of fine anatomical regions.Imaging-based three-dimensional(3D)reconstruction,virtual simulation of surgery and 3D printing optimize the surgical plan through preoperative assessment,improving the controllability and safety of intraoperative operations,and in difficult-to-reach areas of the posterior and superior liver,assistive robots reproduce the surgeon’s natural movements with stable cameras,reducing natural vibrations.Electromagnetic navigation in abdominal surgery solves the problem of conventional surgery still relying on direct visual observation or preoperative image assessment.We summarize and compare these recent trends in digital medical solutions for the future development and refinement of digital medicine in hepatobiliary surgery.
文摘目的应用手术导航系统辅助下颌骨缺损修复重建,与单纯使用CAD/CAM导板技术对比,评价导航技术疗效。方法选择已行下颌骨肿瘤切除同期修复重建的患者22例,术中采用实时导航系统Brain Lab+CAD/CAM导板辅助自体移植骨关键部位定位的病例10例(A组);术中单独采用CAD/CAM导板辅助关键部位定位的病例12例(B组),2组均术前行计算机辅助设计、术中行模型外科技术处理。术后均予颌面部三维CT复查,与术前设计三维CT比对,选择下颌角点(A)和髁状突外极点(C)作为下颌骨重建外形的关键标志点,利用Geomagic studio 12.0软件测量两标志点在术前设计与术后完成的三维位置的直线距离(AL、CL),并进行统计学分析;术后6个月复查随访,对颜面部对称性进行手术效果比较。结果 2组均顺利完成手术,两个标志点的距离偏差为:A组AL为(1.86±0.20)mm,CL为(1.63±0.24)mm;B组AL为(3.75±1.14)mm,CL为(2.96±0.85)mm。2组AL、CL测量值分别进行独立样本t检验比较,差异具有统计学意义(P<0.05);关键标志点就位A组较B组精确,A组术后面型对称性较B组好。结论术中采用手术导航系统比单纯使用CAD/CAM导板更能提高下颌骨修复重建的手术精确度和疗效,恢复面部对称性。
