45,893 research outputs found
Quantum Parabolic Sombrero
We have discussed the energy levels and probability distribution density for
a quantum particle placed in the two-dimensional sombrero-shaped potential
.Comment: 10 pages, LaTex, 6 figures (eps). accepted in Phys. Lett.
The development of a novel, selective desulfurization process
The removal of hydrogen sulfide from natural, industrial of bio gas is an operation that is frequently encountered in process industry. Driven by tight sulfur specifications and the everlasting need for cost reduction a considerable research effort is made in this field,\ud
sprouting numerous new developments in desulfurization technology.\ud
The procede desulfurization process is a regenerative process that is capable of removing H2S from a gas stream without the uptake of CO2. The removal of H2S is selective since the absorption process is based on the precipitation reaction of H2S with metal ions present in an aqueous solution under the formation of metal sulfide
Rational matrix solutions to the Leech equation: The Ball-Trent approach revisited
Using spectral factorization techniques, a method is given by which rational
matrix solutions to the Leech equation with rational matrix data can be
computed explicitly. This method is based on an approach by J.A. Ball and T.T.
Trent, and generalizes techniques from recent work of T.T. Trent for the case
of polynomial matrix data.Comment: 15 page
Incidental catches of pelagic megafauna by the EU pelagic fleet in the Mauritanian exclusive economic zone during the year 2001 : results extracted from the scientific observer program
The joint project between the Netherlands Institute for Fisheries Research (RIVO) and the Mauritanian Institute for Oceanography and Fisheries Research (IMROP) has been initiated in 1998 in order to strengthen Mauritania’s capacity for research on stocks of small pelagic fish. Part of this project is the 'Scientific Observer Program' that monitors the catches (conserved and discarded) of the EU fishery for small pelagics in Mauritania. The EU pelagic fleet in Mauritania focuses their fisheries mainly on the group of sardinella, additional target species are horse mackerel, chub mackerel and pilchard. Still, the unwanted bycatches of non-commercial large animals such as sharks and dolphins is inevitable so far. This report describes the total bycatches of the pelagic megafauna by the EU pelagic fleet in the Mauritanian Exclusive Economic Zone during the year 2001. The current sampling of large bycatches appears to be full of shortcomings and the collected data are inadequate to apply for the evaluation of the impact of the EU pelagic fishery in Mauritania. Therefore it is concluded that the program needs to undergo a thorough renewal. Essential recommendations are given
Elitism Levels Traverse Mechanism For The Derivation of Upper Bounds on Unimodal Functions
In this article we present an Elitism Levels Traverse Mechanism that we
designed to find bounds on population-based Evolutionary algorithms solving
unimodal functions. We prove its efficiency theoretically and test it on OneMax
function deriving bounds c{\mu}n log n - O({\mu} n). This analysis can be
generalized to any similar algorithm using variants of tournament selection and
genetic operators that flip or swap only 1 bit in each string.Comment: accepted to Congress on Evolutionary Computation (WCCI/CEC) 201
- …