科技查新检索都比较复杂，主题多。

靠检索员自己制定全面、准确的检索策略，确实比较困难。

现在的检索系统一般都有智能检索技术支持，能保证查全的基础上查准。

看看这个检索实例，还不算复杂，只有机器能做到，人是不行的。

检索平台：美国NIH临床试验网站

http://clinicaltrials.gov/ct2/results?term=Coronary+Disease++and+++adenosine+triphosphate++and+++radionuclide+imaging+++and++Multicenter+Study++&Search=Search

检索课题内容

ATP介入心肌灌注显像诊断冠心病多中心研究

A Multi Centers Research on Adenosine TriphosphateStress Myocardial Perfusion Imaging in Detection of Coronary Artery Disease

ATP介入心肌灌注显像诊断冠心病多中心研究：213例病人在一个月内行三磷酸腺苷负荷核素心肌灌注显像（ATP-MPI）和冠状动脉造影（CAG），以CAG结果为金标准，研究ATP-MPI诊断冠心病的准确性及其安全性。

http://clinicaltrials.gov/ct2/results?term=Coronary+Disease++and+++adenosine+triphosphate++and+++radionuclide+imaging+++and++Multicenter+Study++&Search=Search

 PUBMED数据库平台

http://www.ncbi.nlm.nih.gov/pubmed/details?querykey=1

 详细的智能检索策略

("coronary disease"[MeSH Terms] OR ("coronary"[All Fields] AND "disease"[All Fields]) OR "coronary disease"[All Fields]) AND ("adenosine triphosphate"[MeSH Terms] OR ("adenosine"[All Fields] AND "triphosphate"[All Fields]) OR "adenosine triphosphate"[All Fields]) AND ("radionuclide imaging"[Subheading] OR ("radionuclide"[All Fields] AND "imaging"[All Fields]) OR "radionuclide imaging"[All Fields] OR "radionuclide imaging"[MeSH Terms] OR ("radionuclide"[All Fields] AND "imaging"[All Fields])) AND ("multicenter study"[Publication Type] OR "multicenter studies as topic"[MeSH Terms] OR "multicenter study"[All Fields] OR "multicentre study"[All Fields])

http://www.ncbi.nlm.nih.gov/pubmed/details?querykey=1