Robust location algorithm based on weighted least-squares support vector machine (WLS-SVM) for non-line-of-sight environments
October 2011
One of the main problems facing accurate location in wireless communication systems is non-line-of-sight (NLOS) propagation. Though learning location methods perform well in NLOS environments, learning location methods may be improved further since these methods do not consider outliers in the training data set. In this paper, we extend weighted least squares support vector machine (WLS-SVM) algorithm to mobile location...
Suboptimal sparse channel estimation for multicarrier underwater acoustic communications
October 2011
Multipath channels often exhibit sparse structures in multicarrier underwater acoustic (MC-UWA) communication systems. Conventional linear channel estimators, such as least squares (LS) and minimum mean square error (MMSE) are considered as optimal solutions under the assumption of rich multipath. However, they often result in low spectral efficiency due to neglect of the sparsity in multipath...
Application of weighted average on modal parameters for damage detection algorithms: Case study on steel beam
October 2011
This study verifies the use of the proposed weighting method by Fayyadh and Abdul Razak (2011a) for damage detection algorithms applied on cracked steel beam. The results of the proposed weighting method for two damage severity algorithms are presented. That is,one based on the natural frequencies and the other based on the mode shape vectors. In addition, the stiffness deterioration based on the mathematical...
An innovative new product development strategy: The Key success paths approach
October 2011
Given the rapid changes in the high-tech industry and fierce global competition in the market, shortening the life cycle of a product is necessary. Such a backdrop highlights the role of new product development (NPD). Many studies have explored how the outcomes of NPD projects are affected by key success factors (KSFs). In this paper, we investigated key success paths (KSPs) approach by creating and implementing various...
Overlapping Alldiff constraints: SAT versus CSP encoding application to the Sudoku
October 2011
Constraint satisfaction problems (CSP) or Boolean satisfiability problem (SAT) are two well-known paradigms to model and solve combinatorial problems. Modeling and resolution of CSP is often strengthened by global constraints (e.g., Alldiff constraint). This paper highlights two different ways of handling specific structural information: a uniform propagation framework to handle (interleaved) Alldiff constraints with...
Development and application of an integrated multi-objective methodology for supplier selection
October 2011
This study developed a hybrid supplier selection model, which combines multi-objective data envelopment analysis (MODEA) and multi-objective genetic algorithm (MOGA), called as MODP. MODEA involved the consideration of several supplier selection factors. In addition to maximizing the efficiency of the decision making unit (DMU) itself, the approach also took into account other DMUs, enabling minimization of the total...
Hybrid differential evolution and gravitation search algorithm for unconstrained optimization
October 2011
This paper proposed an algorithm called DE-GSA. The proposed algorithm incorporates both the concepts from Differential evolution algorithm (DE) and Gravitation search algorithm (GSA), updating particles not only by DE operators but also by GSA mechanisms. The proposed algorithm is tested on several benchmark functions including unimodal and multimodal test functions, multimodal test function with fix dimension, and...
Characterization of a composite material in adobe subjected to natural weathering: The case of El Hara Djelfa- Algeria
October 2011
This work presents an experimental study carried on the characterization of a local material polyphasic used for the interior temperature control in a climatic environment subjected to very important temperature variations. The physical and structural properties of the composite allowed a durability of the buildings during millenia. However, the raw ground is weakened by deterioration due to the effect of the...
Prototype expert system for material selection of polymeric composite automotive dashboard
October 2011
As a consequence of rapid development in material technology, determination of the right material for a given engineering application was viewed as a crucial decision. Various polymer materials selection methods have been developed to assist designers to determine the right polymer for a given engineering application. This paper presents a new natural fibre composite material selection process for automotive dashboard...
Artificial-Neural-Network modeling of the compressive uniaxial stress dependence of ferroelectric hysteresis: An application to soft lead zirconate titanate ceramics
October 2011
In this work, artificial neural network (ANN) modeling was used to model ferroelectric hysteresis under the influence of compressive uniaxial stress using the hysteresis data obtained from soft lead zirconate titanate as an application. The main objective is to model the role of external stress, including electric field perturbation, on the complex hysteresis properties, which are hysteresis area, remnant polarization,...
Generation of land cover map using geospatial tools: A case study from Ardebil, Iran
October 2011
Remote sensing and geographical information system (GIS) have gained importance as powerful and efficient tools for land cover mapping. Digital image classification is generally performed to produce land cover maps from remote sensing data, particularly for large areas. In this study, IRS LISS III data was prepared for producing land cover map of study area, Ardebil, Iran. Digital image processing techniques were...
Evaluation of a collapsed anchored bored pile retaining system by using finite elements method
October 2011
This study evaluates and investigates a collapsed retaining system constituted with anchored bored files, with the aim of presenting an example for the damages caused by the errors made in a project and construction phase. For determining the reasons for the collapse occurred in retaining system, field evaluations were implemented, calculations in the project were checked through and re-analyses...
Performance improvement for pipe breakage prediction modeling using regression method
October 2011
In water distribution systems, the challenge was always to develop reliable models for predicting the failures for each individual pipe in their lifetime to keep the system reliable. The ability of predicting the pipe failure is one of the most important fundamentals for the effective rehabilitation strategy. Statistical methods are the most used techniques in this field. The prediction accuracy reflects the reliability...
Variability of El Niño-Southern oscillation from 1880 to 2010 revealed by wavelet analysis
October 2011
The El Niño-Southern oscillation (ENSO) is shown to have undergone significant changes in variance and coherency over the last 130 years. Wavelet analysis is applied to sea surface temperature anomalies (Niño3 SSTA) index to obtain frequencies of the temporal variations in the signal. This technique works in terms of specific events while allowing a researcher to keep an eye on the ensemble properties. By...
Investigation of the effect of climatic adaptation on users’ thermal comfort requirement in outdoor space
October 2011
With the increasing demand for leisure outdoor spaces, understanding the occupants’ thermal comfort requirement outdoors is an essential and forward-looking matter for designers to design more new attractive spaces. This paper presents the results of a long-term field comfort survey in shaded outdoor spaces, which primarily concerned with the comfort conditions of open spaces in cities. The database consists of...
Analysis of entropy generation in a variable viscosity fluid flow between two concentric pipes with a convective cooling at the surface
October 2011
Entropy generation rate in a variable viscosity liquid flowing steadily through two concentric cylindrical pipes with convective cooling at the pipe surface, are studied using the second law analysis. The outer system is assumed to exchange heat with the ambient following Newton’s cooling law, and the fluid viscosity model varies as an inverse linear function of temperature. The resulting equations and the...
Modified Kudryashov method for generalized forms of the nonlinear heat conduction equation
October 2011
An analytic study on the two generalized forms of the nonlinear heat conduction equations is presented in this paper. The modified Kudryashov method is employed to construct exact solitary wave solutions of these equations. The results reveal that the modified Kudryashov method is a powerful mathematical tool to solve nonlinear partial differential equations (NPDEs) in terms of accuracy and...
Comparison between the image qualities obtained with low energy high-resolution (LEHR) and LEGP collimators in single-photon emission computed tomography (SPECT) under implementation of different filters
October 2011
The aim of a single-photon emission computed tomography (SPECT) filter is to use the sharpest filter/smooth combination consistent with getting quality images. Fourier filtering technique has been shown to greatly improve image quality in both the spatial and temporal domain. An optimal filter manipulates the image in such a way that the image quality is enhanced without losing the basic components of the...
An augmented Lagrangian method of optimization problems with cone constraints
October 2011
A deterministic global optimization algorithm based on augmented Lagrangian is proposed for solving the nonlinear programming with cone constraints, which is often encountered in technical design and operational research. At each outer iteration, the method requires the -global minimization of the augmented Lagrangian of problems with cone constraints, where. The convergence to an-global minimizer of the original...
A new support vector machine- genetic algorithm (SVM-GA) based method for stock market forecasting
October 2011
Since analysis of time series is so hard to do, a support vector machine can be more proper for the purpose of forecasting in field of stock market. The support vector machine (SVM) can explore suitable knowledge from so vague data, which usually is necessary to interpret the financial data. But single SVM cannot achieve accurate results. Subsequently, in this paper a combinational intelligent strategy is presented. The...
Free vibration of symmetric angle-ply laminated cylindrical shells of variable thickness including shear deformation theory
October 2011
Free vibrational study of symmetric angle-ply laminated cylindrical shells of variable thickness including first order shear deformation theory using spline function approximation is studied. The equations of motion for the cylindrical shells are derived using first order shear deformation theory. The solutions of displacement functions are assumed in a separable form to obtain a system of coupled differential equations...
Interacting fading memory modified input estimation for maneuvering target tracking
October 2011
The modified input estimation (MIE) has been introduced recently and it provides fast initial convergence rate as well as satisfactory tracking performance in low and medium maneuvering target cases. Unfortunately, it fails to track a high maneuvering target accurately due to modeling errors relating to the target acceleration dynamics. In this paper, an improvement on the MIE is proposed for maneuvering target...
Soft ordered Abel-Grassman's groupoid (AG-groupoid)
October 2011
In 1999, Molodtsov developed the theory of soft sets involving enough parameters, which is relatively free from complexities when dealing with uncertainties. Most of the applications of soft sets towards algebraic structures stress on associativity of the binary operations (e.g., semigroups, groups, modules and rings etc.). In this study, we aim to apply Molodtsov's notion of soft sets to a class of non-associative...
A study of the optical properties of semi-organic crystals doped with erbium
October 2011
Organic crystals have nonlinear optical effects (NLO) that make them attractive for applications in frequency conversion and optical processing. Among these we find the amino acids. glycine is the simplest of all amino acids in the crystalline form, has three different polymorphs a, b and g in which the molecules exist in the dipolar form (NH3+CH2COO-). In this work, we obtained glycine crystals...
Estimation of domestic and industrial emissions in Côte d’Ivoire (West Africa)
October 2011
The domestic and industrial gaseous emissions are estimated in order to complete the high resolution inventory of biogenic and pyrogenic emissions performed over the Côte d’Ivoire (Ivory Coast). In this study, domestic emissions are estimated from the regional population density including rural or urban character, the amount of fuel (wood and charcoal) used per cape per year and emission factors. The...
Utilization of activated carbon produced from Sago hampas (Metroxylon sagu) to reduce ammonia loss from urea
October 2011
Surface-applied urea contributes to NH3 loss of N through ammonia volatilization, especially in warm and humid regions. Ammonia loss has been a major problem confronting farmers because additional urea is applied to compensate for the loss which increases cost of fertilization. Activated carbon (AC) produced from Sago hampas (SH) could be capable of absorbing N in the form of NH4+ to minimize ammonia...
Analysis of inorganic profile of Tribulus terrestris
October 2011
Tribulus terrestris belonging to the family Zygophyllaceae, grows in tropical climates. T. terrestris is used in treating sexual deficiencies. It has been used in Asia and Europe for years to treat libido and infertility problems. People from around the world used T. terrestrisplant to promote overall health. T. terrestris has antimicrobial, anti-hypertension, diuretic, anti-actylcholine...
Automatic disease diagnosis systems using pattern recognition based genetic algorithm and neural networks
October 2011
This paper presented three disease diagnosis systems using pattern recognition based on genetic algorithm (GA) and neural networks. All systems dealt with feature selection and classification. GA chose subsets of features for the input of the classifier (neural network) and the accuracy of the classifier determined the percentage of effectiveness of each subset of features. The classifiers using in this paper were...
An evaluation of Iranian banking system credit risk: Neural network and logistic regression approach
October 2011
The current study seeks to provide a new solution for evaluation of banking system customers risk by integrating different scientific methodology. Evaluation of banking system customers risk in Iranian banks relies on experts judgment and fingertip rule. This type of evaluation resulted in high rate of postponed claims; therefore, designing new intelligent model for credit risk evaluation will be helpful, thus in this...
Comparative analysis of abrasive waterjet (AWJ) technology with selected unconventional manufacturing processes
October 2011
This paper deals with a comparative analysis, and compares abrasive waterjet cutting technology with oxy-fuel, plasma and laser unconventional manufacturing processes. This paper is intended to provide initial technical and economic information relating to the comparison of technologies. Key words: Abrasive waterjet, plasma cutting, oxy-fuel cutting, laser cutting.
Coefficient distribution of the stability function of a high order integrator
October 2011
This study considers the stability function of a high order integrator analysed by Onianwa and Aashikpelokhai (2007) for the sole purpose of having a sound knowledge of the way in which the coefficients of the stability function is distributed. The study enables us to draw the conclusion as an alternative proof that lies in the unit ball in R3. It also studied and established that the integrator is consistent...
A class of exact solutions of second grade fluid
October 2011
This paper describes a class of exact solutions of the equations of motion for an unsteady, incompressible non-Newtonian second grade fluid in the Cartesian co-ordinates. The exact solutions of non-linear equations governing the flow of second grade fluids are obtained through generalized separation variables method by assuming certain form of stream functions. The expressions for velocity profile and vorticity stream...
Fuzzy ideals in partially ordered pseudoeffect algebras
October 2011
Pseudoeffect algebras are non-commutative generalizations of effect algebras, which can serve as models of both quantum structures and non-commutative logics. The main contribution of this study is twofold. Firstly, we initiate an order-theoretic extension of pseudoeffect algebras, called partially ordered pseudoeffect algebras (abbreviated po-PEAs). Secondly, we investigate the fuzzy ideal theory of po-PEAs. In...
A new method for moving object detection using variable resolution bionic compound eyes
October 2011
The compound eyes of insect are highly optimized for the task of visual acquisition of relevant information from the environment, such as moving object detection. These have attracted the attention of many researchers in recent years. The advantages of compound eyes are illustrated in this paper in relation to other approaches in moving object detection. The paper describes the imaging mechanism for the compound eyes,...
Effectiveness of 3D geoelectrical resistivity imaging using parallel 2D profiles
October 2011
Acquisition geometry for 3D geoelectrical resistivity imaging in which apparent resistivity data of a set of parallel 2D profiles are collated to 3D data set was evaluated. A set of parallel 2D apparent resistivity data were generated over two model structures. The models, horst and trough structures, simulates the geological environment of a weathered profile and refuse dump site in a crystalline basement complex,...
Reducing multiplication operation and independent processing for monocular simultaneous localization and mapping (SLAM) feature state covariance matrix computation
October 2011
Monocular simultaneous localization and mapping (SLAM) research is a study which concentrates on how to derive position and motion estimates information from tracked features using a single camera. Before the features can be processed by standard extended Kalman filter (EKF), they have to be initialized. In the initialization process, the state covariance matrix calculation is found to be the most time consuming...
Construction of efficient conjoint experimental designs using MCON procedure
October 2011
Conjoint analysis has been a widely used method for measuring customer preferences since 1970s. This method is based on the idea that customers' decisions depend on all tangible and intangible product features. One of the fundamental steps in performing conjoint analysis is the construction of experimental designs. These designs are expected to be orthogonal and balanced in an ideal case. In practice, it is hard to...
A novel nanometric fault tolerant reversible divider
October 2011
Quantum and reversible logic circuits have more advantages than the common circuits, like low power consumption. These circuits are good choice to design future computers. One of the important issues in reversible logic is parity preservation. If parity of inputs and outputs are equal in reversible gate, this gate will be parity preserve. Reversible circuits made by these gates are parity preserve. In this paper we...
Differential evolution algorithms for grid scheduling problem
October 2011
Differential evolution (DE) has recently emerged as simple and efficient algorithm for global optimization over continuous spaces. DE shares many features of the classical genetic algorithms (GA). But it is much easier to implement than GA and applies a kind of differential mutation operator on parent chromosomes to generate the offspring. Grid computing aims to allow unified access to data, computing power, sensors and...
Detection of damage location using mode shape deviation: Numerical study
October 2011
This study presents the use of mode shapes for the identification of damage location. The residual values from curve fitting procedure on mode shape vectors with Chebyshev standard rational series were used to detect the damage along the beam length. The results showed that all the mode shapes for the damaged cases deviated from that of the undamaged case, where the deviation was towards the damage location. The results...
Removal of random noises for electrocardiogram (ECG) signals using adaptive noise canceller without reference input
October 2011
The removal of random noises in electrocardiogram (ECG) using adaptive noise canceller (called single-input adaptive noise canceller) without reference input is presented in this paper. Common approaches for noise cancellation require reference input that must be well-correlated with the noise part of the primary input. However, the reference input may be limited in availability and hence, results in degradation of...
New low specific absorption rate (SAR) antenna design for mobile handset
October 2011
We intend and design a new type of mobile handset antenna structure to reduce the specific absorption rate (SAR) in human head. The designed of low SAR handset antenna will be operating at 2.4 GHz frequency for wireless local area network (WLAN) by considering some parameters that determine the performance of the antenna. The authors carried out simulation by placing antenna at different position to determine...
Quantitative analysis of cohesive energy density: A Gordon parameter of 1:1 aqueous sodium salts solutions
October 2011
The Gordon parameter (g/V21/2(dyne mol1/2)/cm2) of solutions of NaNO3, NaCl and CH3COONa binary mixtures of water in composition range 0.4 to 8.7, 0.6 to 4.6 and 0.4 to 6.1 mol/kg (m), respectively are reported. The cohesive energy density data are analyzed in terms of aggregation of the water molecules around ionic sphere. The 13 ((dyne mol1/2)/cm2) value of the Gordon parameter (g/V21/2) was noted for effective...
Synthesis and characterization of PbO nanostructure and NiO doped with PbO through combustion of citrate/nitrate gel
October 2011
Our goal in this research was to obtain lead oxide nanostructure and NiO doped with PbO through the combustion of a citrate/nitrate gel. In this method, lead oxide nanostructure and NiO doped with PbO was synthesized through the reaction of citric acid (C6H7O8.H2O) solution and lead acetate (Pb(C2H3O2)) solution as stabilizer and precursor, respectively. At first, in the presence of metal nitrate and citric acid,...
DFT study of solvent effects on tautomerization of 4-(2-thiazolylazo)-resorcinol
October 2011
Here, the structural parameters of the enol and keto tautomers of the 4-(2-thiazolylazo)-resorcinol (TAR) were determinate. Also, tautomerization mechanism of the TAR was investigated, employing density functional theory and the polarizable continuum model (PCM). In addition to the gas phase calculations, the tautomerization mechanism of the TAR was investigated in the chloroform and dimethyl sulfoxide (DMSO) solutions...
The pseudo Grüneisen parameter in dense fluids from distribution functions
October 2011
The Grüneisen parameter (in solids) and the pseudo Grüneisen parameter (in liquids) are of high importance in physics, chemistry and material science. The pseudo Grüneisen parameters in dense fluids have been evaluated using three known analytical expressions for radial distribution functions (RDFs). Using such approach not only tests the power of distribution functions theory in predicting the pseudo...
A GIS-based survey for the optimization of infiltration forecasting models with emphasis on slope effect and land use
October 2011
Morphology and specifically slope have an important effect on water losses due to infiltration and obtained runoff from rainfall. Approximately all of infiltration models survey infiltration in the large scale region (like a basin) and through a vertical column. In other words, they work with this assumption that slope is equal to zero. There are few infiltration models such as modified green and Ampt model which use...
Effect of cement content and water/cement ratio on fresh concrete properties without admixtures
October 2011
This paper investigates the effects of cement content and water/cement ratio on workable fresh concrete properties with slump changing between 90 to 110 mm, and determines the relations among fresh concrete properties such as slump, compacting factor, VeBe, unit weight and setting times of mortar with temperature history. The experiments were conducted under laboratory conditions on eight different concrete mixtures...
Effect of fly ash and hemihydrate gypsum on the properties of unfired compressed clay bricks
October 2011
The effect of fly ash type F and hemihydrate gypsum on the mechanical and thermal properties of unfired compressed clay bricks (UCSB) using a semi-dry mixture was determined. UCSB were molded from two different semi-dry mixtures, the bricks made with dark-brown soil + sand + chemical additives were labeled as DBS-LG while the other bricks made with the mixture dark-brown soil + sand + fly ash +...
Physical and mechanical properties of decomposed granite soils sampled in Cheongju, Korea
October 2011
Decomposed granite soils are in a wide range of conditions depending on the degrees of weathering. This paper is intended to examine laboratory tests, such as consolidation tests and conventional triaxial compression (CTC) tests conducted in order to find out the mechanical properties of Cheongju granite soil. Along with the foregoing, the results of basic physical tests conducted in order to grasp the physical...
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