我用的matlab2010b 没有解析解>> S=dsolve('Dx=v1-v2*x/(x^2+y^2)^(1/2)','Dy=-v2*y/(x^2+y^2)^(1/2)','x(0)=0','y(0)=100','t')Warning: Explicit solution could not be found. > In dsolve at 101 S = [ empty sym ]
