However, Koch never credited the Hesses for their discovery of bacteriological agar, perhaps because, at the time, he failed to recognize its importance. Even after he received the insight about agar from the Hesses, Koch stuck with gelatine for years. In 1883-84, during his first medical expedition to Egypt and India to investigate cholera, he tried and failed to grow the cholera bacterium on gelatine media in the hot climate of Cairo (despite using a half-open fridge for incubation), only succeeding in the colder winter of Calcutta.
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市场数据印证了这一转变的初步成效。2026年1月，华住旗下全季实现连开20店、汉庭开业17家，环比上月有所上升；亚朵集团旗下亚朵品牌10店齐开，表现同样不俗；腰部艺龙旗下的艺龙安悦酒店和艺龙酒店分别开业4家和5家。尽管以上数据对比去年同期仅有个位数增长，但于行业而言，一股"转变之风"已然刮起。
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在深度学习中，有几类经典激活函数，每种都有自己的优缺点：
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