1000 resultados para x
Resumo:
Experimental Extended X-ray Absorption Fine Structure (EXAFS) spectra carry information about the chemical structure of metal protein complexes. However, pre- dicting the structure of such complexes from EXAFS spectra is not a simple task. Currently methods such as Monte Carlo optimization or simulated annealing are used in structure refinement of EXAFS. These methods have proven somewhat successful in structure refinement but have not been successful in finding the global minima. Multiple population based algorithms, including a genetic algorithm, a restarting ge- netic algorithm, differential evolution, and particle swarm optimization, are studied for their effectiveness in structure refinement of EXAFS. The oxygen-evolving com- plex in S1 is used as a benchmark for comparing the algorithms. These algorithms were successful in finding new atomic structures that produced improved calculated EXAFS spectra over atomic structures previously found.
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Dark brown sediment with clasts ranging from small to large in size. The clast shape ranges from angular to sub-rounded. Clasts appear fractured, weathered, and are well dispersed. Lineations and rotation structures are commonly seen throughout the sample. A few comet structures and grain stacks can also be seen.
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Map measuring 28 cm. x 24 cm. showing the Walter H. Dickson land along the road from Blenheim, n.d.
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Tesis (MaestrÃa en Ciencias de la IngenierÃa Mecánica con Especialidad en Diseño Mecánico) UANL
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Tesis (MaestrÃa en Ciencias con Especialidad en IngenierÃa Cerámica) UANL
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Tesis (MaestrÃa en Ciencias con Especialidad en IngenierÃa Cerámica) UANL
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Tesis (MaestrÃa en Ciencias, con especialidad en MorfologÃa) U.A.N.L.
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Tesis (Maestro en Ciencias con especialidad en MetrologÃa de la Radiación) U.A.N.L.
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Tesis (MaestrÃa en Ciencias con Especialidad en MetrologÃa de la Radiación) U.A.N.L.
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Tesis (MaestrÃa en Ciencias con Especialidad en QuÃmica AnalÃtica) U.A.N.L.
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Tesis ( MaestrÃa en Enseñanza Superior) U.A.N.L.
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[Tesis] ( MaestrÃa en Ciencias con Orientación en IngenierÃa Cerámica) U.A.N.L.
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[Tesis] ( Maestro en Ciencias con Especialidad en Genética ) U.A.N.L.
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Tesis (MaestrÃa en Ciencias con Orientación en QuÃmica de los Materiales) UANL, 2012.
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Tesis (MaestrÃa en Ciencias con orientación en QuÃmica de los Materiales) UANL, 2014.