The basic information
(1) computer aided manufacturing process innovation.
(2) digital assembly technology for aircraft.
(3) product lifecycle management.
(4) micro-machining and combined machining.
 geng junhao*, tian xitian, bai mingxing, jia xiaoliang, liu xiangwei, a design method for three-dimensional maintenance, repair and overhaul job card of complex products, computers in industry, 2014, 65(1), pp. 200-209.
 geng junhao*, zhang sumei, yang bin, a publishing method of lightweight 3d assembly instruction for complex products, journal of computing and information science in engineering, 2015, 15（3）, pp. 1-12.
 wang gangfeng, tian xitian, geng junhao *, guo biao, a knowledge accumulation approach based on bilayer social wiki network for computer-aided process innovation, international journal of production research, 2015, 53(8), pp. 2365-2382.
 jianjun tang, xitian tian, junhao geng*, sensitivity analysis of deviation source for fast assembly precision optimization, mathematical problems in engineering, 2014, 2014, 1-7.
 gangfeng wang, xitian tian, junhao geng*, optimal selection method of process patents for technology transfer using fuzzy linguistic computing, mathematical problems in engineering, 2014, 2014, pp. 1-10.
 zhao, dongping，tian xitian，geng junhao*，a bottleneck detection algorithm for complex product assembly line based on maximum operation capacity，mathematical problems in engineering，2014，2014, pp. 20-29.
 junhao geng*, knowledge-driven computer aided process innovation method, research notes in information science, 2013, 13, pp. 73-77.
 geng junhao*,zhang zhenming, tian xitian, zhang dinghua,plm oriented multi-granular access control model，computer integr ated manufacturing sy stems,2008，14(11)，pp.2119-2128.
 geng junhao*,zhang zhenming, tian xitian, zhang dinghua,product lifecycle- oriented bom similarity metric method，china mechanical engineering
 geng junhao*,zhang zhenming, tian xitian, zhang dinghua,plm oriented domainspecific modeling method，computer integr ated manufacturing sy stems，2008，14(2)，pp.262-267.