Lei Sun

Jan 24, 2025 | science.org | Zhiwen Jiang |Patrick Sullivan |Tengfei Li |Bingxin Zhao |Xifeng Wang |Tianyou Luo | +9 more

Dec 5, 2024 | mdpi.com | Lei Sun |Xuewei Liu |Meiling Lin |Xiucai Fan

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Nov 5, 2024 | onlinelibrary.wiley.com | Ying Cao |Lei Sun |Xiaopeng Li |Qi Zhang

1 Introduction The palatine tonsil is an important immune-active tissue [1] and the first barrier to foreign bacteria entering the body. Inflammatory changes and hypertrophy in the palatine tonsils are common pediatric diseases. Inflammatory diseases have a sudden onset and progress rapidly, potentially to peritonsil cellulitis and abscess, which may be life-threatening [2].

Nov 2, 2024 | mdpi.com | Yudie Hu |Lei Sun |Xiuqing Mao |Shuai Zhang

All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.

Jun 3, 2024 | mdpi.com | Lei Sun |Chong Li |Zhijun Xu |Lianhai Tai

1. IntroductionDue to old age and lack of maintenance, the roadway’s surrounding rock deformation and damage are serious. During the mining period—especially in the vertical distribution with the working face towards the abandoned roadway—the surrounding rock of the abandoned roadway has difficulty withstanding the influence of the working face over the front support pressure and the phenomenon of roof fracture, which are two types of instability.