Because existing local topology revision schemes are not complete and their implementation is too complex, two modeling modes of power network topology analysis are firstly induced and a graph theory based connexity judging method is proposed; then a brief partial topology revision scheme for breaker-position change is put forward.

For the ultimate bearing capacity analysis of derrick steel structures, a novel method is proposed based on the partial model updating theory, in which, the test stresses of the main load-bearing member bars are taken as the key indicators and the relevant design parameters as the input updating objects.