1. The task analysis is a prerequisite
- Clear document retrieval purposes
- Substantive issues clearly Problem to be Solved
- What are clear theme concept
- The relationship between the theme concept
- Clear topics covered range of subjects
- Expressly required language document object information, time specific requirements
| If the subject is not very understanding, reading may be flood understand the relevant background knowledge, you can also communicate with tutors and subject to further clarify the concept of themes related to the aid of books, encyclopedias and so on. |
2. Select the database is a reasonable basis
- Professional, choose the related disciplines of tools, pay special attention to the interdisciplinary field of content.
- Authority, try to choose an authoritative retrieval tools of the discipline.
- Indexed retrieval tools to understand the scope, including time span, geographical scope, document language, type, depth disclosed
- Understand the functions and retrieval method for retrieving tool
| Retrieval system may give priority to Chinese CNKI, Articles, VIP database, foreign language database may be considered WOS, EI, ScienceDirect, Springer, IEEE like. |
3. The right search terms is the key
- Based on standardized terms, taking into account the free word, synonyms, synonyms, word implies, the full name, acronym, abbreviation, inflection, bogey from the coinage
- Search terms should be able to reveal the subject of the subject matter of words, do not function words and some broad sense of the word as a search term, such as research, to explore, to think, applications.
- The information needs into a number of specific concept words, try to avoid to do the key words in one sentence.
- Auxiliary tool choice of words:
Database (word tables, indexes, recommended word)
Specialized dictionaries and encyclopedias
CNKI translation assistant http://dict.cnki.net
example:
Application of electronic radio frequency identification technology in Logistics
Search term: RFID Logistics
Refining search terms
- A radio frequency identification, RFID, tag, smart tag
RFID，radio frequency identification，
- Logistics
logistics，logistic
4. The search expression is reasonable assurance
Search expression: is there a logical expression search terms and operators composed of retrieval
Application of electronic radio frequency identification technology in Logistics
中文检索式：（射频识别 or RFID or 电子标签 or 智能标签） and 物流
（射频识别+RFID+电子标签+智能标签）*物流
外文检索式：
（RFID or radio frequency identification）and logistic*
注：以上涉及表达式所用的符号和字母是在英文半角状态下构建
5.检索是一个不断试错的过程，要随时修改检索策略
一般来说，当检索结果不理想时，可以从以下几点考虑检索式的调整：
（1）检索词是否准确？是否有同义词、近义词或其它隐含的词未被抽取。
（2）检索式是否准确？是否有全角字符？组配算符是否正确合理？
（3）检索字段是否合理？可考虑从不同的检索字段（比如题名、关键词、主题字段）进行试检索，必要时用全文检索
（4）检索工具是否选择正确？必要时换个检索工具
6.善用数据库的结果分析可以事半功倍
- 被引频次、下载频次：找到最有影响的文章
- 作者：了解课题相关研究的国内外作者（同行）信息
- 机构名称：了解课题相关研究机构
- 出版年：了解课题研究发展趋势
- 来源出版物：了解课题相关文献主要发表期刊
- 学科类别：了解课题相关研究的跨学科/领域的发展应用
- 参考文献与引证文献：参考文献，越查越旧，找到信息源头；引证文献，越查越新，找到最新进展
7.原始文献获取
- 图书馆购买的网络全文数据库
- 馆藏印刷文献
- 网络搜索可以获得部分免费的文献
- 文献传递和馆际互借：杭电图书馆目前已经和国家图书馆、上海图书馆等建立稳定的合作关系，通过ZADL和CASHL可以进行文献传递（研究生补贴政策）
- 其他免费途径：文献互助社区、向作者索取全文