A new technique is presented to identify intervals for parameters and initial conditions for nonlinear dynamic systems based on an imprecise mathematical model and measurements of system variables. This technique employs a fuzz interval qualitative simulator for interval dynamical models and a qualitative description of measured signals, the episodes. These are based on the sign of the variable...

INTRODUCTION In a previous paper1 a microcanonical ensemble of reacting pairs of molecules in bimolecular reactions was considered and a quasiequilibrium assumed between the pairs and activated complexes moving in a positive direction along the reaction coordinate. As noted previously, this microcanonical version of activated complex theory is related to the usual version by means of a Laplace ...

Molecular dynamics (MD) simulations using a first principles-based Embedded-atom-Method (EAM) potential are used to simulate the exothermic alloying reactions of a NiAl bilayer at 1500 K and 1100 K. Both microcanonical (NVE) and isoenthalpic (NPH) MD simulations are used to demonstrate the influence of pressure on atomic mixing and subsequent alloying reaction. The NVE simulations, in which the...

Self-propagating exothermic reactions (SPERs) provide intense localized heat sufficient for bonding metals or alloys with minimal excursion to the components, which shows great potential die-attach in power electronics packaging. However, reliability of such formed joints is yet be fully understood owing a wide range defects involved instantaneous propagating reaction and heating/cooling. In th...

For the high-power modules packaging, Cu clip bonding has gained growing interest to replace multiple wire-bonding for benefits of lower resistance and improved thermal performance, which is especially beneficial higher reliability. However, current interconnection materials processes cannot fully meet reliability requirements emerging integrated structure. Brazing alloys can serve in high-temp...

The validity of the Arrhenius equation for dissociative electron attachment rate coefficients is investigated. A general analysis allows us to obtain estimates of the upper temperature bound for the range of validity of the Arrhenius equation in the endothermic case and both lower and upper bounds in the exothermic case with a reaction barrier. The results of the general discussion are illustra...

Distributed Multimedia Information System Laboratory School of Computer Science, Florida International University Miami, FL 33199, USA Abstract Styrene Monomer (SM) has been widely used for producing polystyrene (PS), acrylonitrile-butadiene-styrene (ABS) and styrene-acryonitrile (SAN) in the petrochemical industry. From 1994 to 2001, several serious accidents occurred in Taiwan due to styrene ...

A new technique is presented to identify intervals for parameters and initial conditions for nonlinear dynamic systems based on an imprecise mathematical model and measurements of system variables. This technique employs a fuzz interval qualitative simulator for interval dynamical models and a qualitative description of measured signals , the episodes. These are based on the sign of the variabl...

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