Doctor Liu's research group chosen 50 schools in more than 300 movie-experimental schools in the whole country, and does the sampling and tracinganalysis.
The shape-finding analysis of slack cable-bar assemblies is involved in the former topic, and the motion tracinganalysis of planar pin-bar mechanisms can describe the latter topic well.
前者涉及到松弛态索杆体系的找形分析，后者可简化为平面连杆机构的运动形态分析。
3
The DB2 tracing mechanism makes the analysis somewhat easier, but the trace files are complicated and hard to analyze manually.