7,447 research outputs found
Ballistic Thermal Transistor of Dielectric Four-terminal Nanostructures
We report a theoretical model for a thermal transistor in dielectric
four-terminal nanostructures based on mesoscopic ballistic phonon transport, in
which a steady thermal flow condition of system is obtained to set up the
temperature field effect of gate. In the environment, thermal flow shows the
transisting behaviors at low temperatures: saturation, asymmetry, and
rectification. The phenomena can be explained reasonably by the nonlinear
variation of the temperature dependence of propagating phonon modes in
terminals. The results suggest the possibility of the novel nano-thermal
transistor fabrication
Study and development of novel composite materials for the application of car brake rotor
From experimental study of properties including density, tensile strength, Young’s modulus, fracture toughness for both aluminium alloy reinforced with silicon carbide and aluminium alloy reinforced with alumina representing metal matrix composites, and measurements of compressive strength for the above composites and alumina and aluminium titanate based ceramics as functionally graded materials, together with estimated thermal conductivity and specific heat capacity, show promising results for the use of these materials for car brake rotor
Sustainable Management of Grassland in a Changing Social-Ecological System: A Case Study in China
Parametric well-posedness for variational inequalities defined by bifunctions
AbstractIn this paper we introduce the concepts of parametric well-posedness for Stampacchia and Minty variational inequalities defined by bifunctions. We establish some metric characterizations of parametric well-posedness. Under suitable conditions, we prove that the parametric well-posedness is equivalent to the existence and uniqueness of solutions to these variational inequalities
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