The fleet assignment model assigns a fleet of aircraft types to the scheduled flight legs in an airline timetable published six to twelve weeks prior to the departure of the aircraft. The objective is to maximize profit. While costs associated with assigning a particular fleet type to a leg are...

Many industrial processes need steam at temperatures from 100 to 200 °C, normally produced by directly heating water via coal, natural gas or oil combustion. Nevertheless, large amounts of unused heat below 100 °C are wasted in other industrial processes. In principle, a high-temperature...

The paper discusses the development of the third mission of Chinese universities. The main approaches and challenges of two universities, Tsinghua University and Beihang University, are examined to elucidate the third mission of Chinese research universities in a knowledge-based economy. The...