992 resultados para LOCAL STRESSES
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[ES] Los responsables políticos y los gestores de los gobiernos locales de las ciudades se enfrentan con un problema recurrente: cómo atender, con recursos cada vez más escasos, las demandas de sus ciudadanos y a los actores con interés en su territorio, en términos tanto de eficacia en la prestación de servicios como de profundización democrática. Utilizando una metodología cualitativa, el objetivo de este trabajo es identificar hasta que punto un proceso de planificación estratégica pública sirve para compatibilizar las demandas de democracia y eficacia en el gobierno y administración pública local, involucrando a los ciudadanos y a los actores económicos privados. Este estudio de caso demuestra esa posibilidad aunque se hacen necesarias investigaciones comparativas adicionales.
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Duración (en horas): Más de 50 horas. Destinatario: Estudiante y Docente
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<正> The SiCw/6061Al composites were fabricated by squeeze casting method. Varia-tions of thermal residual stresses with quenching temperature, cooling manner, aging time and thethermal-cold cycle process in thin specimens,and the distributions of thermal residual stresses alongthe distances from the surface and changes with heating temperatnres in thick specimens were stud-ied by means of X-ray diffraction (XRD). The effects of residual stresses on the mierostructure, di-mensional stability and age-hardening behavior were studied by SEM, TEM observations, and tensiletest. The results showed that there existed macrostress, microstress and thermal mismatch stress inSiCw/Al compo-site,and the presence of microstress and thermal mismatch stress has no influenceon the measurement of macrostress, but the macrostress can affect the measured value of thermalmismatch stress. Thermal res dual stress induced during the composite fabrication process, will be further in-creased when the composite were subjected to the e
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DNS of spatiotemporal evolution of a wake-type flow is performed. In the incoming flow, a local spanwise nonuniformity in momentum defect is initially imposed. Results show that the spanwise nonuniformity leads to a series of symmetric twist vortex dislocation in downstream of the flow. Vortex line variations and substantial transition of vorticity from spanwise to the streamwise and vertical directions clearly feature the generation of a vortex dislocation and the real vortex linking in the dislocation. Dynamical process and the mechanism responsible for the vortex dislocation are described.
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III,178 p.
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El libro está editado en bilingüe castellano-euskera