6 Matching Annotations
1. Dec 2021
2. www.irishtimes.com www.irishtimes.com
1. McQuinn, C. (n.d.). Schools and childcare services to get up to €72m for ventilation. The Irish Times. Retrieved December 13, 2021, from https://www.irishtimes.com/news/health/schools-and-childcare-services-to-get-up-to-72m-for-ventilation-1.4753597

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3. Apr 2021
4. www.thelancet.com www.thelancet.com
1. Greenhalgh, Trisha, Jose L. Jimenez, Kimberly A. Prather, Zeynep Tufekci, David Fisman, and Robert Schooley. ‘Ten Scientific Reasons in Support of Airborne Transmission of SARS-CoV-2’. The Lancet 0, no. 0 (15 April 2021). https://doi.org/10.1016/S0140-6736(21)00869-2.

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5. Mar 2021
6. www.cnn.com www.cnn.com
1. CNN, L. M. (n.d.). CDC says masks protect wearers from Covid-19. CNN. Retrieved 1 March 2021, from https://www.cnn.com/2020/11/10/health/masks-cdc-updated-guidance/index.html

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7. Feb 2021
8. www.microcovid.org www.microcovid.org
1. “Still Using a Cloth Mask? Upgrade to an N95 or P100!” Accessed February 28, 2021. https://www.microcovid.org/blog/masks.

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9. www.zhihu.com www.zhihu.com
1. 滤链（filtration）

$$\left\{\mathcal{I}_{n}, n \geq 0\right\}$$

一组滤链

• 滤链定义在$$(\Omega, \mathscr{F}, \mathscr{P})$$

• 滤链满足$$\mathcal{I}{0} \subseteq \mathcal{I}{1} \subseteq \mathcal{I}_{2} \subseteq \cdots$$

10. Aug 2020