نتایج جستجو برای: propagation constant
تعداد نتایج: 320814 فیلتر نتایج به سال:
The extreme importance of emergency response in complex buildings during natural and human-induced disasters has been widely acknowledged. In particular, there is a need for efficient algorithms for finding safest evacuation routes, which would take into account the 3D structure of buildings, their relevant semantics and the nature and shape of hazards. In this paper, we propose algorithms for ...
We present a new constant propagation (CP) algorithm for predicated code, for which classical CP-techniques are inadequate. The new algorithm works for arbitrary control flow, detects constancy of terms, whose operands are not constant themselves, and is optimal for acyclic code such as hyperblocks, the central “compilation units” for instruction scheduling of predicated code. The new algorithm...
The problem of determining of the normalization constant of a wave function describing an arbitrary type of an infinite motion for a one-dimensional potential is discussed. It is shown that for the cases of the momentum or the quasi-wave number representations the normalization constant does not depend on the representation parameter. In contrast to these cases for the energy representation the...
In this paper, a new technique for measuring the effective propagation constant of dense random media is presented. This technique involves two major steps: 1) measurement of the mean bistatic scattered field of a cluster of the random medium confined in a spherical boundary and 2) characterization of the complex permittivity for a homogeneous dielectric sphere having identical radius and bista...
In this paper, a parametric directional-based MIMO channel model is presented which takes multipath clustering into account. The directional propagation path parameters include azimuth of arrival (AoA), azimuth of departure (AoD), delay, and power. MIMO measurements are carried out in an indoor office environment using the virtual antenna array method with a vector network analyzer. Propagation...
OF DOCTORAL DISSERTATION HELSINKI UNIVERSITY OF TECHNOLOGY P. O. BOX 1000, FI-02015 TKK http://www.tkk.fi Author Jussi Salmi Name of the dissertation Manuscript submitted May 15, 2009 Manuscript revised July 18, 2009 Date of the defence August 14, 2009 Article dissertation (summary + original articles) Monograph Faculty Department Field of research Opponent(s) Supervisor Instructor Abstract
A Markovian model i s formulated to find the throughputdelay performance for slotted-ALOHA multihop packet radio networks with a fixed configuration of packet radio units (terminals and repeaters) and.fixed source-to-link paths for packets. Improvements in performance which are obtained by the adjustment of transmission parameters (suppression/acceleration) according to the states of nearby uni...
This article applies PARAllel profiles with LINear Dependencies (PARALIND) model to analyze identifiability of parameter estimation in the presence of incoherent multipath via uniform linear array (ULA). New identifiability results are derived based on the uniqueness property of PARALIND model and structure property of ULA. With the strong properties of trilinear model, the proposed identifiabi...
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