内容简介：Estimation of the prevalence and contagiousness of undocumented novel coronavirus (SARS-CoV2) infections is critical for understanding the overall prevalence and pandemic potential of this disease. Here we use observations of reported infection within Chin
Abstract
Estimation of the prevalence and contagiousness of undocumented novel coronavirus (SARS-CoV2) infections is critical for understanding the overall prevalence and pandemic potential of this disease. Here we use observations of reported infection within China, in conjunction with mobility data, a networked dynamic metapopulation model and Bayesian inference, to infer critical epidemiological characteristics associated with SARS-CoV2, including the fraction of undocumented infections and their contagiousness. We estimate 86% of all infections were undocumented (95% CI: [82%–90%]) prior to 23 January 2020 travel restrictions. Per person, the transmission rate of undocumented infections was 55% of documented infections ([46%–62%]), yet, due to their greater numbers, undocumented infections were the infection source for 79% of documented cases. These findings explain the rapid geographic spread of SARS-CoV2 and indicate containment of this virus will be particularly challenging.
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个体与交互
Ken Howard、Barry Rogers / 贾永娜、张凯峰 / 机械工业出版社华章公司 / 2012-3-20 / 45.00元
对敏捷软件开发的关注重点，通常都集中在“机制”方面，即过程和工具。“敏捷宣言”认为，个体与交互的价值要高于过程和工具，但这一点很容易被遗忘。在敏捷开发中，如果你重新将注意力放在人的方面，将会收获巨大利益。 本书展示了如何解决敏捷团队在实际项目中遭遇的问题。同时，本书也是很有实用价值的敏捷用户指南，其中包含的故事、最佳实践方法、经验以及技巧均可应用到实际项目当中。通过逐步实践，你将学会如何让团......一起来看看 《个体与交互》 这本书的介绍吧!
