We consider the problem of exact and inexact matching of weighted undirected graphs, in which a bijective correspondence is sought to minimize a quadratic weight disagreement. This NP-hard problem is often relaxed as a convex quadratic program, in which the space of permutations is replaced by the space of doubly-stochastic matrices. However, the applicability of such a relaxation is poorly und...

The false lock performance and false lock margin of I-Q Costas loops with matched-filter/sample-and-hold (S&H) arm filters are derived for the case of a random data input with symbols of arbitrary pulse shape.

A discrete-time model is proposed for continuous-time repetitive process. Model is calculated based on the zero order hold on input approach and trapezoidal approximation of output signal on input to the state equation. Numerical examples are presented. Copyright © 2005 IFAC

We study the effect of asset liquidity (“tangibility”) on firm policies in the presence of financing constraints. We do so in a real options framework that allows for the simultaneous determination of investment and financing. In the presence of financing imperfections, firms that operate more tangible assets have larger credit capacity. By expanding the firm’s capital base, the investment proc...