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燃料电池/蓄电池混合动力汽车建模与仿真(英文) 被引量:6
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作者 孙桂芝 sam park 林忠玲 《系统仿真学报》 CAS CSCD 北大核心 2018年第12期4816-4824,共9页
对以燃料电池为主电源,蓄电池为辅助电源的混合动力汽车进行建模。采用设定阈值的方法进行功率控制。当车辆需要的功率超过设定阈值时,蓄电池与燃料电池共同输出功率。否则,由燃料电池单独输出功率,制动能量回收为蓄电池充电。应用MATLA... 对以燃料电池为主电源,蓄电池为辅助电源的混合动力汽车进行建模。采用设定阈值的方法进行功率控制。当车辆需要的功率超过设定阈值时,蓄电池与燃料电池共同输出功率。否则,由燃料电池单独输出功率,制动能量回收为蓄电池充电。应用MATLAB/Simulink软件对FUDS和NEDC两种驾驶循环模式进行仿真,结果显示蓄电池的存电状态可以获得良好的恢复,氢气消耗量大幅度降低。 展开更多
关键词 燃料电池混合动力汽车 功率控制 建模仿真 燃油消耗
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A comparison of financial and operational efficiency between smart and traditional insufflation for laparoscopic surgery: A granular analysis 被引量:1
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作者 Aazad Abbas Imran Saleh +5 位作者 Graeme Hoit Gurjovan Sahi sam park Jihad Abouali Cari Whyne Jay Toor 《Laparoscopic, Endoscopic and Robotic Surgery》 2023年第3期97-102,共6页
Objective:Smart insufflation(SI)techniques relying on valve and membrane-free insufflation are increasing in usage.Although considerable literature exists demonstrating the benefits of SI on procedural ease and patien... Objective:Smart insufflation(SI)techniques relying on valve and membrane-free insufflation are increasing in usage.Although considerable literature exists demonstrating the benefits of SI on procedural ease and patient outcomes,there remains a paucity describing the financial impact of these devices.The purpose of this study was to determine the financial and efficiency impact of these devices on the operating room and inpatient wards of a hospital.Methods:A discrete event simulation model representing a typical mid-sized North American hospital comparing SI to traditional insufflation(TI)was generated.The National Surgical Quality Improvement database from 2015 to 2019 was used to populate the model with data supplemented from the literature.Outcomes included length of stay(LOS),duration of surgery(DOS),annual procedure volume,profit,return on investment(ROI),and gross profit margin(GPM).From the literature review,DOS savings were 10e32 minutes/case,while LOS savings were 0e3 days/case.Results:Implementation of an SI led to an increase in annual throughput of 42e346(4.4%e36.6%)cases for all procedures and 38 to 297(4.3%e33.3%)cases for complex procedures.LOS was found to be decreased by 175e614(18.3%e64.2%)days for all procedures and 231 to 614(35.6%e77.9%)cases for complex procedures with the implementation of an SI.Together,this resulted in an increase in net profit of$104,685 per annum.The ROI of SI over the TI device was>1000%,and the GPM for the TI was 90.0%,while the GPM for the SI was 71.7%.Conclusion:Despite the initial financial investment being greater,the implementation of SI offsets these expenses and yields significant financial benefits.Our study demonstrates the financial benefits of SI over TI and illustrates how granular operational and financial analyses of technologies are essential to aid in sound healthcare procurement decision making. 展开更多
关键词 INSUFFLATION Airseal Surgical efficiency Financial impact
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