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考虑建成环境的酒驾事故时空分布特征
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作者 于晓桦 田雨晗 杨大志 《交通科技与经济》 2024年第4期36-44,共9页
为深入了解我国酒驾事故的时空分布特征及其与周围建成环境的空间距离阈值,以济南市2022年发生的1034起酒驾事故与13029起非酒驾事故案例为研究对象,结合季节性强度指数与地理集中指数等衡量指标,分析酒驾事故的时空分布特征;利用近邻... 为深入了解我国酒驾事故的时空分布特征及其与周围建成环境的空间距离阈值,以济南市2022年发生的1034起酒驾事故与13029起非酒驾事故案例为研究对象,结合季节性强度指数与地理集中指数等衡量指标,分析酒驾事故的时空分布特征;利用近邻分析与基于最大类簇直径改进的K-means聚类算法,探究出周围建成环境与酒驾事故点的空间距离阈值。结果表明:酒驾事故的时间分布季节强度指数为4.128,大于非酒驾事故的3.839,时间分布差异性更大,且高发时段(20:00—02:00)与餐饮服务的高峰营业时间一致。酒驾事故的地理集中指数G为32.713%,大于均匀分布情况下的地理集中指数G,空间集聚程度更高,且与周围建成环境分布具有密切联系。餐饮服务、购物服务、住宿服务与商务住宅的聚类中心点到酒驾事故点的距离阈值分别为798.415 m、694.378 m、658.234 m与739.622 m。 展开更多
关键词 交通安全 酒驾事故 近邻分析 K-MEANS聚类算法 距离阈值
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Changes in blood alcohol concentration and driving ability after alcohol intake 被引量:1
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作者 覃华丽 张岫竹 +3 位作者 赵新才 朱秉忠 周继红 王正国 《Journal of Medical Colleges of PLA(China)》 CAS 2004年第2期123-126,共4页
Objective: To study the relationship between the amount of consumed alcohol, blood alcohol concentration (BAC), and driving ability among a part of the population in Southwest China and to provide reference for the fo... Objective: To study the relationship between the amount of consumed alcohol, blood alcohol concentration (BAC), and driving ability among a part of the population in Southwest China and to provide reference for the formulation of the legal limits for safe driving. Methods: Seventy-six randomly selected volunteer drivers each had three times of alcohol intake (100 ml each time). After each drank, BAC was measured with gas chromatograph and driving ability was evaluated. The drivers were grouped according to age, weight, alcohol tolerance and driving experience respectively and changes in BAC and driving ability were analyzed. Results: Average BAC and the percentage of drivers showing impaired driving ability in the groups increased after each intake of 100 ml alcohol. BAC in Group≤60 kg was more susceptible to alcohol than that in Group>60 kg. When each drank, alcohol had greater influence on drivers who had comparatively shorter driving experience. Conclusion: Volume of consumed alcohol, BAC and driving ability have direct associations among one another and are all under the influence of various factors including individual conditions. To set an appropriate legal BAC limit for safe driving should take an overall consideration of all factors. 展开更多
关键词 blood alcohol concentration driving ability intoxicated driving traffic crash
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