Tlie knowledge imperfections should be considered when modeling complex problems. A solution is to develop a model that reduces the complexity and another option is to represent the imperfections: uncertainty, vagueness and incompleteness in the knowledge base. This paper proposes to extend the classical object oriented architecture in order to allow modeling of problems with intrinsic imperfec...

Light localization due to random imperfections in periodic media is paramount in photonics research. The group index is known to be a key parameter for localization near photonic band edges, since small group velocities reinforce light interaction with imperfections. Here, we show that the size of the smallest localized mode that is formed at the band edge of a one-dimensional periodic medium i...

Cash takeover bids financed from internally generated cash reserves could be a function of capital market imperfections (Myers and Majluf 1984) or symptomatic of “free-cash-flow” problems (Jensen 1986, 1988). We find that bids financed from cash reserves outperform those that use debt financing. Further, ‘free cash flow’ firms outperform ‘non-free cash flow’ firms. The majority of cash bids are...

In 1866 Laurence and Moon reported ' Four cases of " retinitis pigmentosa" occurring in the same family and accompanied by general imperfections of development.' These imperfections included small stature, hypogenitalism, obesity and mental defect, although little emphasis was placed on the two last. Over fifty years later, Bardet (1920) added polydactyly to the syndrome, and in 1922 Biedl, rep...

We study analytically and numerically the effects of various imperfections in a quantum computation of a simple dynamical model based on the quantum wavelet transform. The results for fidelity time scales, obtained for a large range of error amplitudes and number of qubits, imply that for static imperfections the threshold for fault-tolerant quantum computation is decreased by a few orders of m...

Abstract The postbuckling behavior of a clamped-clamped elastic fiber constrained inside rigid cylinder is analyzed theoretically, numerically, and experimentally. We concentrate on characterizing the contact configuration between wall during initial postcontact stages deformation, in which only small segment length maintains with wall. This apparently first study that phenomenon presenting an ...

Institute for Geoinformation and Cartography, Vienna University of Technology Gusshausstrasse. 27-29, A-1040 Vienna, Austria [email protected] 1. Abstract. Data quality and ontology are two of the dominating research topics in GIS, influencing many others. Research so far investigated them in isolation. Ontology is concerned with perfect knowledge of the world and ignores so far imperf...

Recently, the marginalized particle filter (MPF) has been applied to blind symbol detection problems over selective fading channels. The MPF can ease the computational burden of the standard particle filter (PF) while offering better estimates compared with the standard PF. In this paper, we investigate the application of the blind MPF detector to more realistic situations where the systems suf...

A robust beamforming with quadratic constraints, formulated as a semidefinite programming (SDP) problem, is proposed in this paper. With this formulation, the constraints on magnitude response can be easily imposed on the adaptive beamformer. And the non-convex quadratic constraints can be transformed into linear constraints. Therefore, the proposed method can be robust against the steering dir...