We have studied the transport in two random dimer models. The site energies are chosen randomly from a binary distribution, one pair at a time and the hopping terms (nearest neighbour only) are chosen to be either (i) a constant, or (ii) perfectly correlated to adjacent random site energies. In...

The dynamics of cycle-to-cycle variations (CCV) was investigated in a natural gas direct-injection spark-ignition engine. The method of continuous wavelet transform was used to analyze the time series of the indicated mean effective pressure (IMEP) and other combustion variables. The dominant...

Using wavelet-based multiresolution analysis, this study investigates the effect of hydrogen addition on cyclic variability in a natural gas spark ignition engine. The engine is operated at 3000rpm, and a lean combustible mixture with excess air ratio of 1.4 is used. Three cases are examined:...

In a Monte Carlo study of the two dimensional Ising system (of size 100 × 100) with nearest neighbour ferromagnetic interaction in the presence of a sinusoidally varying external magnetic field, we studied the variation of the hysteretic loop area (A) with frequency (f), amplitude (h0) of...

We investigate a model correlated bond percolation problem on a 2D square lattice. We throw conducting bonds at random on a lattice. The nearest-neighbour gaps (which are not actually connected through conducting bonds) are bridged by some other “tunneling” bonds, which represent tunneling...