3I, S Homemde Mello. A correct and complete algorithm for the gen- eration of mechanical assembly sequences [ J]. IEEE Transaction on Robotics and Automation, 2001,7 ( 2 ) : 38 - 42.
4Carl Chatfield, Timothy Johnson -~:. Microsoft Office Project 2007 Step by Step[ M]. 北京:清华大学出版社,2007:32.