The main problem concerning laptops and handheld devices is the limited battery power, their batteries lifetime have a significant impact on the performance of ad hoc networks since nodes in ad hoc networks need to relay their packets through other nodes. In this paper, fuzzy controllers take number of hops, packet queue occupancy, and remaining energy along the paths into account while picking...

In this paper, we describe a new method submitted to the 2007 Music Retrieval Evaluation eXchange (MIREX) Multiple Fundamental Frequency Estimation task. The Resonator Time-Frequency Image (RTFI) is used as the basic time-frequency analysis tool. The method makes a preliminary pitch estimation by a simple peak-picking operation in the pitch energy spectrum, which is produced from the original e...

The influence of substrate roughness on the wetting scenario of adsorbed van der Waals films is investigated by theory and experiment. Calculating the bending free energy penalty of a solid sheet picking up the substrate roughness, we show that a finite roughness always leads to triple-point wetting reducing the widths of the adsorbed solid films considerably as compared to that of smooth subst...

We present a two-phase model for planning and scheduling of order picking processes. In many warehousing environments order picking processes are organized according to the pick&pack principle. Pickers must build stabile loads during the picking process under strict time constrains. A genetic algorithm with Pareto elitist-based selection has been developed for this multi-criteria optimization p...

In manual order picking systems, order pickers walk or ride through a warehouse in order to collect items requested by customers. The performance of such a system is significantly dependent on its layout which determines the lengths of the order pickers’ tours and the corresponding picking times. Whereas for classic warehouse layouts all picking aisles are arranged in parallel to each other, in...

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