Hierarchical data in which leaf nodes have associated attributes appear in several applications. Rectangular Treemaps (RTs) were designed to display this type of data by tightly packing cells representing the tree nodes, with additional information stored in the cell sizes and/or colors. For dynamic hierarchies, RTs have to obey several requirements regarding the optimal aspect ratio of cells, ...

A low bypass ratio turbofan engine operates in a hostile environment, resulting performance degradation. This seriously affects the security and reliability of engine. Therefore, degradation evaluation method for engines based on flight data is proposed. The expands equation system to solve underdetermined problem caused by lack sensors multiple operating point analysis. improved evolution algo...

Abstract The emission of blast furnace (BF) exhaust gas has been criticized by society. It is momentous to quickly predict the comprehensive coke ratio (CCR) BF, because CCR one important indicators for evaluating emissions, energy consumption, and production stability, also affects composite economic benefits. In this article, 13 data-driven prediction techniques, including six conventional se...