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Tunisia presents a large spatio-temporal variability of rainfall which was largely observed in the last years. This variability is influenced by several local and regional factors. The objective of this paper is to study the characteristics of the space and temporal variability of maximum daily rainfall in the state of Bizerte, located in the low valley of the medjerda basin and to seek the factors...
The present work is dedicated to fluid flow analysis due to natural convection heat transfer in solar chimney power plants. It is related to a numerical simulation study using Saturne and Syrthes open access codes. Four configurations of Solar Chimney Power Plants (SCPP) have been analysed. In the first one, we have considered the ground beneath the collector as a storage system. In the second one,...
A strictly defined notion of an approximate solution for a multicriteria optimization problem with functional constraints and a deterministic method for obtaining such approximations are presented. Unlike traditional algorithms for constrained multicriteria optimization the proposed method not only generates an approximation but also proves its accuracy.
Query Expansion is an important component for information retrieval systems. It makes possible the reformulation of the initial user query by adding new terms. In this paper, we propose a new approach for term selection in the relevance feedback process. This approach, based on Rocchio formula, is an adaptation to the XML information retrieval context. It can resolve two major problems specific to...
Power distribution (PD) networks have many laterals and load taps. Accurate fault locating in PD systems causes to improve reliability indices and its efficiency. In this paper, a new combined method is proposed for locating single phase fault to earth in PD networks. In this article, an impedance based fault-location algorithm is used to find the possible fault locations. Then the new method is proposed...
Transformers illustrate the majority of capital investment in transmission and distribution centers. Additionally, interruptions of power transformer have a significant economic effects on the performance of an electrical network. For this reason, the safe and reliable performance of transformer, directly related to the security and stability of power system. This paper studies the growth of leakage...
This paper proposes a framework for textile defect detection on the basis of energy and contrast features of the gray-level co-occurrence matrix (GLCM). We calculate these features in DCT-based compressed image (DCTb-I), which was produced by using only a small number of DCT coefficients. The proposed detection approach complies with the Moving Picture Experts Group (MPEG) and Motion Joint Photographic...
In this paper, we propose an indoor localization system that integrates the received signal strength (RSS) correction methods with probabilistic propagation models. The proposed system aims to achieve accurate modeling of signals' propagation inside buildings without the need for expensive site surveys. This is achieved by eliminating the environmental noise causing temporal variations in the RSS...
Emergency departments (EDs) are the first admission points of hospitals for patients (victims) during normal and disaster conditions. To meet the uncertain patient demand, make the first examination, discharge or admit into impatient units are included in responsibility of these departments. Resource design of emergency departments in order to struggle patient surge for earthquake disaster conditions...
A method based on Interval Type-2 Fuzzy Logic Systems (IT2FLSs) for combination of different Support Vector Machines (SVMs) in order to bearing fault detection is the main argument of this paper. For this purpose, an experimental setup has been provided to collect data samples of stator current phase a of the induction motor using healthy and defective bearing. The defective bearing has an inner race...
In this paper a recursive algorithm for robustly stabilizing an uncertain gained controlled polynomial with affine linear coefficients, is presented. The finite step algorithm is constructed using the results of Hurwitz invariability and the respective results of simulated annealing tuning techniques. The algorithm is appropriately modified expanding the search horizon of previous algorithms aiming...
The article describes the development of distributed information-analytical system of educational statistics, which allows to do effective quality control of the educational process. A mathematical model of educational statistics indicators, the functional support and architecture of software implementation of information-analytical system were developed.
Cargo transportation is one of the most important topics in today's fast growing and globalized logistics sector. Ecommerce activities make valuable contributions to cargo and logistics sectors. In this study, technological transfer center of a cargo company in Turkey that consists of infeeds, outfeeds, reject line and a sorter system was considered. The main problem is the imbalance between the expected...
Polymer optical waveguides are increasingly being used for short distance communication links. They are especially developed and applied in areas, where the conventional use of electrical solutions for signal transmission is limited, due to data transfer rates and electromagnetic compatibility. The prerequisite for an operational optical communication link is the end-facets preparation of the light...
When considered as a life cycle graph for a single-species plant population, a finite 2D lattice digraph represents a sample of polyvariant ontogeny, meaning the diversity of pathways that individual plants may go in their development. Botanists regard polyvariant ontogeny as the major mechanism of adaptation at the local population level, while the corresponding matrix model provides for a quantitative...
To have complete information about a target which is detected in RADAR requires its range, velocity/Doppler and Direction of arrival information. RADAR capable of finding all these 3 characteristics of targets can be connected with a network so that targets can be tracked and destroyed using the information. This paper presents Modeling and Simulation results of a 3-D RADAR.
The aim of this paper is motivated by the following question: “If a series were best characterized by fractional process, would a researcher be able to detect that fact by using conventional Dickey-Fuller (1979) test?” To answer this question, in simple framework, we propose a new fractional Dickey-Fuller (F-DF) test, different from the test of Dolado, Gonzalo and Mayoral (2002).
Double layer shaped charges (DLSC) are special type of shaped charges which have recently attracted the attention of some researchers. In this paper, the application of overdriven detonation (ODD) in the design of DLSC is analyzed. The previously reported experiments carried out for comparison of the ballistic performance of DLSC with the ordinary shaped charge (OSC) are simulated using the hydrodynamic...
The challenging problem of jointly sequencing multiple items at the manufacturer facility, deciding on the delivery policy of end-items to the downstream retailers, as well as the replenishment strategy of raw materials from upstream suppliers is tackled in this paper. The objective is to develop the production and shipping schedule such that the chain-wide total setup, holding and ordering costs...
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