实用医学信息检索与利用医学信息检索特色和专业数据库 课件.ppt

Exercise 3 请分析下列检索需求的检索用词。写出中英文主题词和副主题词。 肝硬化的并发症 房颤的遗传学机制 乳腺癌的普查 维生素C 治疗感冒 阿昔洛韦治疗带状疱疹 慢性阻塞性肺疾病的营养干预 Exercise 4 利用MESH树形结构表查出与自己专业相关的主题词所在的树形结构号和主题词。（所有级别） Diseases [C]分类 Neoplasms [C04]?分类 Neoplasms [C04]?? ? Neoplasms by Site [C04.588] Abdominal Neoplasms [C04.588.033]??+ Anal Gland Neoplasms [C04.588.083] Bone Neoplasms [C04.588.149]??+ Breast Neoplasms [C04.588.180] Breast Neoplasms, Male[C04.588.180.260] Mammary Neoplasms [C04.588.180.520] Mammary Neoplasms, Experimental [C04.588.180.525] Phyllodes Tumor [C04.588.180.762] Digestive System Neoplasms [C04.588.274]??+ “糖尿病”树形结构 内分泌系统疾病　糖尿病　　糖尿病并发症　　　糖尿病血管病变 (+ 2) 糖尿病足　　 　糖尿病视网膜病变 　糖尿病昏迷 (+ 1) 高血糖高渗性非酮性昏迷 　　 糖尿病酮症酸中毒　　　糖尿病肾病　　　糖尿病神经病变 (+ 1) 糖尿病足 　　　巨大胎儿 “糖尿病并发症”树形结构 MESH主题词间的关系：同义词 用不同的术语表达同一个概念。体现在“entry terms”中。同义词、近义词或密切相关词均被收录在“entry terms”中，帮助用户发现相关的检索术语。 Synonymous: terms that are synonyms, allowing the indexer or searcher to express a concept in different words. Many synonyms, near-synonyms, and closely related concepts are included as entry terms to help users find the most relevant MeSH descriptor for the concept they are seeking. There are over 218,000 entry terms. Entry terms are also text words in general. for example: Vitamin C is an entry term to Ascorbic Acid“. “gene therapy” is an entry term to “genetic therapy”. This means when you use gene therapy to find related literatures by mesh, the Medical subject heading is “genetic therapy”, not gene therapy. MeSH Descriptor Data: ascorbic acidentry term: vitamin c(2013) Entry term: cancer MeSH Descriptor Data: neoplasms MESH主题词间的关系：相关关系 既不是同义词也不存在层级关系，但词语间的确存在某种关系。提醒用户利用不同的检索词检索以提高检索效率。 Related: terms that are not synonymous or hierarchical but are somehow otherwise related. These usually remind the searcher of different but rel