Secondly, a type of (2+1)-dimensional multi-component integrable hierarchy is obtained with the help of a (2+1)-dimensional zero-curvatureequation and Tu scheme.
其次，运用2+1维的零曲率方程和屠格式得到了一类2+1维的多分量的可积系。
2
Based on the analysis of geometry parameters and contact stresses of the deep groove ball bearings, the control equation of groove curvature radius has been drawn out.
The motion of charged particle acted upon by Lorentz force and other external force are analyzed, calculating formulae of orbit equation and curvature radius are derived.