Πλοήγηση ανά Θέμα "SYSTEMS"
Αποτελέσματα 41-60 από 86
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Interpolation based numerical procedure for solving two-point nonlinear boundary value problems
(2004)The present paper offers a simple, efficient and accurate straightforward numerical method for solving two-point nonlinear boundary value problems (NBVPs), which are frequently encountered in a broad discipline of sciences. ... -
Joint optimal access point selection and channel assignment in wireless networks
(2007)In wireless cellular networks or in other networks with single-hop communication, the fundamental access control problem pertains to access point (AP) selection and channel allocation for each user. For users in the coverage ... -
Leakage detection in water pipe networks using a Bayesian probabilistic framework
(2003)A Bayesian system identification methodology is proposed for leakage detection in water pipe networks. The methodology properly handles the unavoidable uncertainties in measurement and modeling errors. Based on information ... -
Low Bacterial Diversity and High Labile Organic Matter Concentrations in the Sediments of the Medee Deep-Sea Hypersaline Anoxic Basin
(2012)Studies in the center and margin of the Medee Basin, a Mediterranean deep-sea hypersaline anoxic basin, and at a reference site during Penelope cruise (2007), revealed the existence of a 7 m-thick halocline, with high ... -
Minimizing WIP inventory in reliable production lines
(2001)This work deals with the well-known buffer allocation problem in short reliable production lines. The objective is to find the optimal buffer allocation (OBA) that minimizes the average work-in-process (WIP) inventory, ... -
Mixing ability of conventionally bred common vetch (Vicia sativa L.) cultivars for grain yield under low-input cultivation
(2011)An alternative way to overcome the negative environmental fluctuations observed in low-input culture systems is to compose and utilize cultivar mixtures. However, the available genetic materials to compose such mixtures ... -
Model-reduction techniques for Bayesian finite element model updating using dynamic response data
(2014)This work presents a strategy for integrating a class of model reduction techniques into a finite element model updating formulation. In particular a Bayesian model updating approach based on a stochastic simulation method ... -
Modeling urban evolution using neural networks, fuzzy logic and GIS: The case of the Athens metropolitan area
(2013)This paper presents an artificial intelligence approach integrated with geographical information systems (GISs) for modeling urban evolution. Fuzzy logic and neural networks are used to provide a synthetic spatiotemporal ... -
Node Isolation Probability for Serial Ultraviolet UV-C Multi-hop Networks
(2011)Non-line-of-sight optical wireless transmission, operated in the unlicensed ultraviolet UV-C band, has been recently suggested as an alternative means of communication. However, due to limited coverage, relayed UV-C networks ... -
Normative conflicts in electronic contracts
(2011)We are concerned with normative conflicts that arise for agents engaging in electronic contracting within an electronic marketplace. We identify a set of primitive conflict patterns, examine other analyses of conflicts ... -
On Multicast Beamforming for Minimum Outage
(2009)The multicast beamforming problem is considered from the viewpoint of minimizing outage probability subject to a transmit power constraint. The main difference with the point-to-point transmit beamforming problem is that ... -
On the influence of building design, occupants and heat waves on comfort and greenhouse gas emissions in naturally ventilated offices. A study based on the EN 15251 adaptive thermal comfort model in Athens, Greece
(2010)According to the Intergovernmental Panel on Climate Change the buildings sector has the largest mitigation potential for CO2 emissions. Especially in office buildings, where internal heat loads and a relatively high occupant ... -
Optical Wireless Communications With Heterodyne Detection Over Turbulence Channels With Pointing Errors
(2009)We study the error performance of an heterodyne differential phase-shift keying (DPSK) optical wireless (OW) communication system operating under various intensity fluctuations conditions. Specifically, it is assumed that ... -
Optimal experimental design in stochastic structural dynamics
(2005)This paper provides a methodology for optimal prediction of the response of randomly vibrating structures using information from a limited number of measurements. The objective is to optimize the locations of sensors for ... -
Optimal sensor placement methodology for identification with unmeasured excitation
(2001)A methodology is presented for designing cost-effective optimal sensor configurations for structural model updating and health monitoring purposes. The optimal sensor configurations ration is selected such that the resulting ... -
Optimization of Biomixture Composition and Water Management for Maximum Pesticide Dissipation in Peat-Free Biobeds
(2012)Biomixture composition and water management are key factors controlling biobeds performance. Although compost-biomixtures (BXs) possess high degradation efficiency, their low water-holding capacity compared with peat-biomixtures ... -
ORGANIC FARMING - WHAT IS GOING ON IN EUROPE?
(2012)Nowadays, crop organic management is implemented in all EU member- states to a smaller or larger extent. The aim of the present work is the analysis of the progress made in organic farming adoption rates in the EU ... -
Overview of the River Basin Management Plans Developed in Greece Under the Context of the Water Framework Directive 2000/60/EC Focusing on the Economic Analysis
(2015)The most important piece of legislation towards integrated water management in Europe is the Water Framework Directive 2000/60/EC (WFD) based on the river basin. During its implementation each Member State (MS) should ... -
Performance of a laser Earth-to-satellite link over turbulence and beam wander using the modulated gamma-gamma irradiance distribution
(2011)We present an analytical framework for the performance evaluation of laser satellite uplinks over the major probabilistic impairments, i.e., atmospheric turbulence and beam wander. Specifically, we consider a ground-stat ... -
Performance of Wheat Varieties (Triticum aestivum L.) under Conservation Tillage Practices in Organic Agriculture
(2011)Field experiments were conducted to determine the effects of tillage systems and varieties on growth, yield and quality of wheat crop (Triticum aestivum L.). The experiments conducted at two sites were laid out in a ...