A local fractional equation is established for fractal heat transfer in silk cocoon hierarchy, and the local fractional variational iteration method is adopted to solve the equation analytically. The result can well explain the intriguing phenomenon for pupa's survival at extremes of weather from negative 40 degrees to 50 degrees.
- fractal heat transfer,
- fractal derivative,
- local fractional variational principle
Available at: http://works.bepress.com/ji_huan_he/67/