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1 天前 · Respiratory syncytial virus ( RSV ), [a] also called human respiratory syncytial virus ( hRSV) and human orthopneumovirus, is a contagious virus that causes infections of the respiratory tract. It is a negative-sense, single-stranded RNA virus. [2] Its name is derived from the large cells known as syncytia that form when infected cells fuse.
1 天前 · Hepatitis B is an infectious disease caused by the Hepatitis B virus (HBV) that affects the liver;[1][6] it is a type of viral hepatitis.[7] It can cause both acute and chronic infection.[1] Many people have no symptoms during an initial infection. For others, symptoms may appear 30 to 180 days after becoming infected and can include a rapid ...
- 820,000 resulting from hepatitis B (2019)
4 天前 · Escherichia coli (/ ˌ ɛ ʃ ə ˈ r ɪ k i ə ˈ k oʊ l aɪ / ESH-ə-RIK-ee-ə KOH-ly) is a gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms. Most E. coli strains are harmless, but some serotypes such as EPEC, and ETEC are pathogenic and can cause serious food poisoning in ...
1 天前 · Malaria is a mosquito-borne infectious disease that affects vertebrates.[6][7][3] Human malaria causes symptoms that typically include fever, fatigue, vomiting, and headaches.[1][8] In severe cases, it can cause jaundice, seizures, coma, or death.[1] [9]Symptoms usually begin 10 to 15 days after being bitten by an infected Anopheles mosquito ...
3 天前 · 国家基因库生命大数据平台CNGBdb通过整合已发布的COVID-19新型冠状病毒序列数据建立数据库，这些数据仅为病毒数据，不包含人类数据。利用该数据整合的新冠肺炎数据库，科研人员可进一步构建进化树揭示该病原相关特性，为研究分析新型冠状病毒的进化来源、致病病理机制提供有效的参考依据。
4 天前 · t. e. In mathematics, a function from a set X to a set Y assigns to each element of X exactly one element of Y. [1] The set X is called the domain of the function [2] and the set Y is called the codomain of the function. [3] Functions were originally the idealization of how a varying quantity depends on another quantity.
3 天前 · 邻域查询 Warning 使用 k-D Tree 单次查询最近点的时间复杂度最坏还是 的，但不失为一种优秀的骗分算法，使用时请注意。 在这里对邻域查询的讲解仅限于加强对 k-D Tree 结构的认识。例题 luogu P1429 平面最近点对（加强版） 给定平面上的 个点 ，找出平面上最近两个点对之间的 欧几里得距离。
