初级检索	高级检索	专业检索	使用帮助

初级检索	高级检索	专业检索	使用帮助

初级检索	高级检索	专业检索	使用帮助

检索项	检索词
All fields Title Author Organization of the Author Source Magazine Year Issue Class No. Keywords Abstract

逻辑

检索项

检索词

	All fields Title Author Organization of the Author Source Magazine Year Issue Class No. Keywords Abstract
And Or Not	All fields Title Author Organization of the Author Source Magazine Year Issue Class No. Keywords Abstract
And Or Not	All fields Title Author Organization of the Author Source Magazine Year Issue Class No. Keywords Abstract
And Or Not	All fields Title Author Organization of the Author Source Magazine Year Issue Class No. Keywords Abstract
And Or Not	All fields Title Author Organization of the Author Source Magazine Year Issue Class No. Keywords Abstract

可用检索项：
检索表达式
	检索表达式使用[CQL检索语言]，含有空格或其他特殊字符的单个检索词用引号("")括起来，多个检索词之间根据逻辑关系 使用“and”或“or”连接。例如：
	1) 论文题名=电力 and 关键词=汽轮机 and 作者 exact "李明" 2) 关键词=锅炉 and 摘要 all "检修"

限定年度范围： 从 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008    到 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008