Freeing up space in a carry-on suitcase is always a tough feat, especially on a long trip. If you’re on the hunt for solutions to pack lighter and smarter, it seems like almost every savvy traveler ...

Anna Popp is a New York-based associate editor at Travel + Leisure, covering all of the best travel products, from luggage to outdoor gear. She has been a travel writer, editor, and product tester for ...

Packaging Corporation of America engages in the production of container products. It operates through the following segments: Packaging, Paper, and Corporate and Other. The Packaging segment offers a ...

Long-haul flights are often the necessary first step to an incredible adventure, but let’s be honest: the journey itself is rarely glamorous. Whether you’re flying overnight or crossing multiple time ...

看起来，题述的“各大平台”可能是习惯性地将一天的分界线定在 4 时、5 时之类——这是硬编码的时间分割，搭配简单的极值计算，不搞睡眠连续性分析。这么做不需要处理连续的时间序列，可以在数据库层面用聚合查询完成，计算复杂度低、适合处理很大的数据量。不过，以现有的大平台的计算能力，我不认为这些好处值得关注。