The methods to improve the heating efficiency by the means of dry ice cleaning ash of the heating pipes, improving the raito of air to oil is introduced.

Review of development of de-icing methods on transmission lines;

The eight key issues of further research are proposed,which are icing mechanism,failure mechanism of iced outdoor insulation,effective anti-icing and de-icing methods,on-line monitoring and diagnosis of icing,localization of transmission line icing disasters,online evaluation,early warning and decision of icing and establishme.

This work was aimed to monitor the ice accumulation on flight structures and deice after self\|diagnosing by using embedded sensors and actuators.

The helicopter rotor blade deicing technique is greatly important to ensure the flight safe- ty.

Study has been made on steel fiber and graphite reinforced conductive concrete slab for deicing in laboratory and snow removing in field based on electrical heating experiments on steel fiber and graphite reinforced conductive concrete slab.

The electrical conduction and electrothermal effect of carbon fiber reinforced conductive concrete were studied at first, and then the deicing experiment in laboratory and snow melting in field were carried out.