基于检索表达式的大数据时代医学生信息检索思维与能力培养

Cultivating the Information Retrieval Thinking and Ability in Era of Big Data Based on Search Expression

大数据时代信息素养内涵从培养信息技术能力与信息意识,拓展到开发信息资源战略、变革思维和学习方式、增强信息安全责任等领域。通过学习检索表达式可培养学生的信息意识、训练学生的检索思维,以及培养学生将自然语言描述的现实问题空间转化为符合某检索工具与计算机能够识别的问题空间的能力。检索表达式由检索词、检索项、连接符、逻辑运算、关系、优先级、匹配、词频、排序等要素组成,是计算机可以识别和执行的检索命令式。检索表达式是自然语言描述的现实检索问题与各专业文献数据库、搜索引擎的人机界面之间的桥梁,好的检索表达式可提高查全率、查准率。

The connotation of information literacy in big data era expand to the strategy development of information resources,reforming thought mode and learning model,strengthen the responsibility of information security,etc,form training the ability of information technology and information consciousness.Search expression education can cultivate students＇ the information consciousness,train students＇ thought of retrieval,and develop students＇ ability to convert between the problem space of natural language and the problem space of computer language.Search expression is composed of retrieval word,retrieval item,connector,priority relationship,logic relationship,matching relationship,term-frequency,result sorting.It is the retrieval command which can be identified and implemented by computer.Search expression is a bridge that connects the reality retrieval problem described with natural language and computer language space represented by the human-computer interface of professional literature database and search engine.Good search expression has higher accurate ratio and recall ratio.