The key elements of the Babcock-Leighton dynamos are the generation of poloidal field through decay and dispersal of tilted bipolar active regions and the generation of toroidal field through the observed differential rotation. These models are traditionally known as flux transport dynamo models as the equatorward propagations of the butterfly wings in these models are produced due to an equato...

Many organizations are using measurement as a means to improve their software development and maintenance processes. A reasonable consensus has been reached about the main success factors for measurement programs. However, no comprehensive approach has so far been published for the processes that need to be in place to ensure effective and efficient measurement. We propose a capability maturity...

In view of the adverse effect of declining cluster, a method of analyzing and assessing declining risks of mature cluster is studied. Through analyzing causes of declining risks, an evaluation index system for declining risks is built. According to the index system, the characteristic patterns of different risk levels are described. Owing to the complexity and uncertainty of cluster system, a T...