提出1种融合乘客个体出行特征及站点土地利用特征识别地铁站点功能的方法。首先,借助AFC(Automatic Fare Collection)数据提取乘客个体出行指标,通过K-means++方法对乘客出行类型进行聚类并识别,将其全天分布特征作为乘客个体出行数据;...提出1种融合乘客个体出行特征及站点土地利用特征识别地铁站点功能的方法。首先,借助AFC(Automatic Fare Collection)数据提取乘客个体出行指标,通过K-means++方法对乘客出行类型进行聚类并识别,将其全天分布特征作为乘客个体出行数据;之后,利用站域POI(Point of Interest)数据表征站点周边土地利用特性,对上述两类数据进行特征提取得到乘客出行特征及站点土地利用特征,并将两类特征合并为站点功能向量;最后,基于功能向量对站点聚类,将北京地铁站点分为6类,分别是弱居住主导型车站、就业主导型车站、旅游及休闲车站、居住主导型车站、职住结合型车站、弱就业主导型车站。站点聚类结果与实际情况较为吻合,验证了本文所提方法的有效性,其结果能为不同用地类别站点周边发展规划提供针对性参考。展开更多
Objective:Nephron-sparing surgery(NSS) for small renal masses offers a similar functional and oncological outcome to that of radical surgery.Laparoendoscopic single-site surgery(LESS) emerges as an advanced alternativ...Objective:Nephron-sparing surgery(NSS) for small renal masses offers a similar functional and oncological outcome to that of radical surgery.Laparoendoscopic single-site surgery(LESS) emerges as an advanced alternative for reduced invasiveness and improves cosmesis;LESS is developing quickly and its indications have been expanded,but still in its infancy.The aim of this paper is to report our preliminary experience in transumbilical LESS partial nephrectomy(LESS-PN),so as to assess its utility, safety and efficacy.Methods:From August 2009 to October 2010,3 patients underwent transumbilical LESS-PN via a novel multi-channel TriPort by a single experienced urologist in our institution.Patient demographics,perioperative and follow-up data were prospectively collected and analyzed.Results:All the three procedures were successfully completed.A 5-mm ancillary trocar was utilized in all 3 cases.The mean operative duration was 226.3(210-254 min) with an estimated blood loss of 56.7 ml (20-100 ml).Mean warm ischemia time was 35.7 min(19-48 min).One patient was transfused due to postoperative bleeding. The recovery was uneventful and mean length of postoperative stay was 13 days(12-14 days).At the latest follow-up,all patients remained symptom-free and had normal renal function without evidence of recurrence,and they were delighted for a hidden transumbilical scar.Conclusion:Transumbilical LESS-PN is a feasible and safe procedure albeit extremely technically challenging.Surgical outcomes at a median follow-up of 2 years are promising,while currently it should be reserved for highly selected patients with favorable tumor anatomy and performed by a very experienced laparoscopic surgeon.展开更多
文摘提出1种融合乘客个体出行特征及站点土地利用特征识别地铁站点功能的方法。首先,借助AFC(Automatic Fare Collection)数据提取乘客个体出行指标,通过K-means++方法对乘客出行类型进行聚类并识别,将其全天分布特征作为乘客个体出行数据;之后,利用站域POI(Point of Interest)数据表征站点周边土地利用特性,对上述两类数据进行特征提取得到乘客出行特征及站点土地利用特征,并将两类特征合并为站点功能向量;最后,基于功能向量对站点聚类,将北京地铁站点分为6类,分别是弱居住主导型车站、就业主导型车站、旅游及休闲车站、居住主导型车站、职住结合型车站、弱就业主导型车站。站点聚类结果与实际情况较为吻合,验证了本文所提方法的有效性,其结果能为不同用地类别站点周边发展规划提供针对性参考。
基金Supported by the Military Major Project for Clinical High-tech and Innovative Technology of China(2010gxjs057)the Municipal Hospitals' Project for Emerging and Frontier Technology of Shanghai(SHDC12010115)the Project for the Key Discipline of Shanghai
文摘Objective:Nephron-sparing surgery(NSS) for small renal masses offers a similar functional and oncological outcome to that of radical surgery.Laparoendoscopic single-site surgery(LESS) emerges as an advanced alternative for reduced invasiveness and improves cosmesis;LESS is developing quickly and its indications have been expanded,but still in its infancy.The aim of this paper is to report our preliminary experience in transumbilical LESS partial nephrectomy(LESS-PN),so as to assess its utility, safety and efficacy.Methods:From August 2009 to October 2010,3 patients underwent transumbilical LESS-PN via a novel multi-channel TriPort by a single experienced urologist in our institution.Patient demographics,perioperative and follow-up data were prospectively collected and analyzed.Results:All the three procedures were successfully completed.A 5-mm ancillary trocar was utilized in all 3 cases.The mean operative duration was 226.3(210-254 min) with an estimated blood loss of 56.7 ml (20-100 ml).Mean warm ischemia time was 35.7 min(19-48 min).One patient was transfused due to postoperative bleeding. The recovery was uneventful and mean length of postoperative stay was 13 days(12-14 days).At the latest follow-up,all patients remained symptom-free and had normal renal function without evidence of recurrence,and they were delighted for a hidden transumbilical scar.Conclusion:Transumbilical LESS-PN is a feasible and safe procedure albeit extremely technically challenging.Surgical outcomes at a median follow-up of 2 years are promising,while currently it should be reserved for highly selected patients with favorable tumor anatomy and performed by a very experienced laparoscopic surgeon.
