diagnosed problems list

troubleshooting problems list

undetected problems list

ability of analyzing problems and solving problems

developing problems posing problems

Packing List， Shipping List

Three Nong problems

0-1 Knapsack Problems

16-body problems

2000 Year Problems

2D acoustic wave problems

3D contact problems

3-D crack problems

3D eddy current problems

3D elasticity problems

3-D elastodynamic crack problems

3N-body problems

Ⅲ-posed problems

A Brief Analysis of Farmer Problems Nowadays