Compared with the traditional tracking problem, underwater 3-D passive manoeuvring target faces following challenging problems: (1) Since signal propagation delay is varying and unknown, relationship between two adjacent states hard to describe; (2) limited by environment, it more difficult establish a motion model; (3) speed of acoustic varies depth, path will be curved instead straight. Vario...

We consider a Dynamic Voltage and Frequency Scaling (DVFS) processor executing jobs with obsolescence deadlines: A job becomes obsolete is removed from the system if it not completed before its deadline. The objective to design dynamic speed policy for that minimizes average energy consumption plus an cost per deadline miss. Under Poisson arrivals exponentially distributed deadlines sizes, we s...