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As the warm weather gradually returns from hibernation, so too do swooping magpies. Here's what you should ...
Traffic deaths for the first quarter of this year were the highest since 2002, according to early estimates from the National Highway Traffic Safety Administration. The agency estimates 9,560 people died from motor vehicle crashes during the first quarter of this year -- up 7% from the same time in 2021. In 2019, NHTSA reported 36,355 people died on U.S. roads -- a number that grew to 38,824 in 2020 and 42,915 in 2021, despite less cars on the road.
Lead is regularly found in vintage items more than 40 years old, but also in many new, cheaply made dollar-store goods. Children are especially susceptible to lead-poisoning even at low levels.
Among the attendees are people who also spread misinformation about 2020 presidential election and other conspiracy theories.
作者|李秋键出品|AI科技大本营(ID:rgznai100)人群密度计数是指估计图像或视频中人群的数量、密度或分布，它是智能视频监控分析领域的关键问题和研究热点，也是后续行为分析、拥塞分析、异常检测和事件检测等高级视频处理任务的基础。随着城市化进程的快速推进，城市人口数量急剧增长，导致各种人员高度聚集的社会活动频繁发生，如果管控不当，极易发生拥挤踩踏事故。例如上海“12.31”外滩踩踏事故中，由于现场管理和应对措施不当，引发了...