Comparison of two synchronization methods for fractional order double scroll chaotic system
November 2011
Synchronization of fractional-order chaotic system has received considerable attention for many research activities in recent years. In this Letter, we introduced a double scroll of fractional-order chaotic system. For the purpose of synchronization, we consider the driven response method and the one-way coupling method. Both the theoretical proof and numerical simulations show the effectiveness of the two...
Analytical evaluation of the nonlinear vibration of a solid circular sector object
November 2011
This paper applied a new class of critical technique for resolution of the cyclic solutions nonlinear called the HE’s variational approach method (VAM) to solve the nonlinear vibration of a solid circular sector object. In variational approach, only one repetition leads to high exactness of the solutions, as opposed to the other methods. It has been found that the variational approach is very prolific,...
Wind speed forecasting based on autoregressive moving average- exponential generalized autoregressive conditional heteroscedasticity-generalized error distribution (ARMA-EGARCH-GED) model
November 2011
With the increase of wind power as a renewable energy source in many countries, wind speed forecasting has become more and more important to the planning of wind speed plants, the scheduling of dispatchable generation and tariffs in the day-ahead electricity market, and the operation of power systems. However, the uncertainty of wind speed makes troubles in them. For this reason, a wind speed forecasting...
Spar platform at deep water region in Malaysian sea
November 2011
Exploration of oil and gas resources has been accelerated towards deeper waters due to depletion of their reserve in shallow water depth. Malaysian sedimentary basins signpost the existence of these energy sources below its sea-bed. In deep sea depth, traditional fixed types of offshore structures to explore these resources have become incongruous and they have resorted to new configurations. Spar platform is...
Design optimization of an active vibration isolation system
November 2011
Several engineering systems require isolation of sensitive equipment from foundation vibrations or isolation of the foundation from machinery vibrations. Even though passive vibration isolation systems are effective in reducing the amplification at resonance, high frequencies attenuation is poor. Active vibration isolation (AVI) systems are being used for eliminating this problem. AVI is essential in multiple...
A new measurement method of separation percentage for human blood plasma based on ultrasound attenuation
November 2011
In this research, the separation accuracy of blood-plasma-based multi-decay pulse-power technique (MDPPT) was presented. The MDPPT provides adjustable-path measurements according to the amplitude of transmitted pulses and accurate attenuation measurements of propagation echoes through blood and blood plasma; thus, reduction of time and power consumption during the plasma separation process was achieved using...
Monte Carlo and density functional theory (DFT) investigation of boron-nitride nano cones in different solvents
November 2011
Quantum Monte Carlo (QMC), molecular dynamics (MD) simulations and density functional theory (DFT) calculations at the level of B3LYP/3-21G was carried out on the structure and stability of B10N11H7 (Thr)2 in bulk and different solvent medium. NMR parameters and thermodynamic properties were calculated to obtain chemical shift, stability and solvent effect. It was found that...
A general method for finding the exact solution of linear Volterra integral equations of the second kind
November 2011
In this paper, a general method is given for the solution of linear Volterra integral equations of the second kind, which is based on the action of the operator defined by the kernel of the integral equation on a suitable basis for the corresponding function spaces. The necessary conditions for using this method are so weak that extends its applicability. The solved examples show the strength of this...
Reliable approach of iterative method for nonlinear fractional differential equations
November 2011
In this paper, a new approach of the iterative method is developed to handle nonlinear differential equations of fractional order. For this reason, an efficient modification of iterative method, namely iterative-Laurent method, is introduced based on iterative method and Laurent series expansion. The proposed approach is capable of reducing the size of calculations and easily overcome the difficulty arising...
Process queuing in the automobile manufacturing body shop: Using a multi-objective model
November 2011
The automobile industry is one of the most important industries in global economics. The automobile manufacturing industry consists of many shops and many stations. Each station has a number of operations, which depend on the number of welded pieces in those stations. One of these shops is the body shop. The problems that occur in the body shop concern queuing and the lead time between stations. This paper...
Recursive parameter estimation for discrete-time model of an electro-hydraulic servo system with varying forgetting factor
November 2011
In general, an electro-hydraulic servo (EHS) system inherently suffers from parameter uncertainties and variation which makes the modeling and controller design complicated. To encounter those difficulties, recursive least square (RLS) is often used with advanced control strategy for position, force and pressure control of the EHS system. In this paper, a new RLS estimator with varying forgetting factor was...
Effects of annealing parameters on grain-growth behavior of HAYNES®-718 superalloy
November 2011
Annealing heat-treatment experiments at temperatures in the range of 1050 to 1150°C (1323 to 1423K) for durations in the range of 20 min to 22 h were conducted for HAYNESÒ718 superalloy plate. Grain sizes for the as-received and the annealed samples of the superalloy were measured by application of quantitative metallographic techniques. The grain-growth exponents, n, for the kinetic...
A research on work accidents in forest products industry in Duzce
November 2011
This study aimed at examining the work accidents and their possible causes experienced by the workers of the industry of forest products active in Duzce and their occupationallives, and determining the solutions suggested. In this study, a questionnaire method was used as a data gathering tool. The questionnaire used in the study composed of 4 main parts and 46 questions. In the forest...
Geomorphometric analysis on the some riverbeds in the Romanian plain
November 2011
The present study refers to some hydrographic basins in the Romanian Plain and appeals to morphometric methods based on the Horton Strahler river hierarchy system. The central part of the Romanian Plain located between ArgeÅŸ (East), Olt (West), Cotmeana Piedmont (North) and Danube (South) has a highly dense hydrographic network. The Vedea and Neajlov basins (for which the major source of the trunk river is...
Diffusion coefficient of ions in migration through soil liners
November 2011
Contaminant transport through soil liners with low hydraulic conductivity is both by advection and diffusion processes though the diffusion process is dominate. Diffusion coefficient of migrating species has to be considered to calculate the velocity of contaminant flume. Diffusion through a network of clay particles is slower and porous media diffusion coefficient (Dp) is used to consider tortuous flow...
Linear quadratic optimal control system design using particle swarm optimization algorithm
November 2011
Selecting appropriate weighting matrices for desired linear quadratic regulator (LQR) controller design using evolutionary algorithms is presented in this paper. Obviously, it is not easy to determine the appropriate weighting matrices for an optimal control system and a suitable systematic method is not presented for this goal. In other words, there is no direct relationship between weighting matrices and...
Three-dimensional visualisation of coastal geomorphology using fuzzy B-spline of dinsar technique
November 2011
This paper introduces a new approach for mapping coastal geomorphology by using differential synthetic aperture radar interferometry (DInSAR). Fuzzy B-spline is used to accelerate and improve the accuracy of 3-D map from DInSAR. The DInSAR algorithm involved two parts: 3-D map simulation and interferogram simulation with discrete element method (DEM) and satellite orbit parameters. 3-D coastal...
Grid resources selection optimization with quality of service guarantee by a hybrid algorithm of genetic and particle swarm optimization
November 2011
When a large number of tasks request different resources in a grid system, resources allocation should have been done with proper planning and scheduling to guarantee a good quality of service (QOS). There are different ways to provide these requests by choosing appropriate resources allocation to optimize the total operation of the system. In this study, first some parameters, such as priority, delay,...
An efficient Markov model for reliability analysis of predictive hybrid m-out-of-n systems
November 2011
In this paper, predictive hybrid redundancy has been extended to large-scale control systems comprising n modules. In m-out-of-n systems, if m-out-of-n modules are in agreement, the system can report consensus; otherwise the system fails. While in our new extension, if there is no agreement, a history record of previous successful result(s) is used to predict the output. In order to analyze the reliability of...
An object-oriented approach of generic diffusion computing for three dimensional ultrasound volumetric images
November 2011
Medical image information representation using two dimensional image planes have major drawbacks on the grounds that the there are technical constrains in providing the optimized spatial orientation and physical limitations. In comparison, three dimensional imaging shows higher degree of versatility in clinical application. Conventional anisotropic diffusion and speckle removal might have promising...
Persian handwritten digits recognition: A divide and conquer approach based on mixture of MLP experts
November 2011
In pursuit of Persian handwritten digit recognition, many machine learning techniques have been utilized. Mixture of experts (MOE) is one of the most popular and interesting combining methods which has great potential to improve performance in machine learning. In MOE, during a competitive learning process, the gating networks supervise dividing input space between experts and experts obtain specialization on...
Enhanced oxygen gas sensor by surface-etched gallium oxide
November 2011
Surface-etched Pt/gallium oxide semiconductor structure has been successfully fabricated and studied for the sensing of oxygen gas. The effects of the sandwich oxide structure with larger sensing area on the oxygen gas sensing property are investigated. In the existence of the etched V-groove gallium oxide geometry, its electrical and sensing properties, that is, high sensitivity, significant increase in...
Metal spraying for revamping and keeping pieces
November 2011
Metal spraying for coating industrial pieces and products are applied in different industrial fields. In these recent years, many researchers have focused on developing various metal spraying methods and their relevant conditions and characteristics. Metal spaying are applied for revamping and reforming new and worn out pieces. In the surface coating by metal spraying, metal particles shoots to the considered...
Optimization of input process parameters variation on threshold voltage in 45 nm NMOS device
November 2011
In this study, Taguchi method was used to optimize the influence of process parameter variations on threshold voltage (VTH) in 45 nm n-channel metal oxide semiconductor (NMOS) device. The orthogonal array, the signal-to-noise ratio, and analysis of variance were employed to study the performance characteristics of a device. In this paper, eleven process parameters (control factors) were varied for 2 levels to...
Water heights and weather regimes at Alexandria Harbor
November 2011
The response of water level variations to the changes in local meteorological elements (atmospheric pressure, air temperature and wind force) has been investigated for Alexandria harbor over 11 years period (1995 to 2005). The study has shown clearly a close connection between them. The coherence is noted and the linear effect is discussed. The result of the regression technique indicated an increase of water...
Study of bioactivity, biodegradability and mechanical properties of polyurethane/nano-hydroxyapatite hybrid composites
November 2011
The present research is focused on the study of a series of polyurethane/nano-hydroxyapatite composites with different nano-hydroxyapatite (nHA) compositions (0, 10, 20, 30 and 40 %wt). Mechanical, biodegradability and bioactivity properties of composites were evaluated. Tensile tests were performed using a dynamic mechanical analyzer (DMA). Biodegradability and bioactivity studies were done by immersion into...
Titanium dioxide as photocatalyses to create self cleaning concrete and improve indoor air quality
November 2011
Air inside buildings can be more polluted than outdoor because there are various sources of pollution in some big cities. This paper presents the results of a study on the efficiency of contributing air cleaning agents such as Titanium dioxide (TiO2) into the technique of producing concrete composite panels, using local waste materials for solving the problem of carbon dioxide (CO2) in indoor air buildings....
Removing sediment transport in open channel with submerged aquatic vegetation: Laboratory study
November 2011
Vegetation affects fluvial processes and is key role in river management in particular sediment transport. Vegetation characteristics such as vegetation’s density, height and distributions have significant effect on sediment transport in vegetated channel. This paper studied the role of aquatic vegetation characteristics in sediment transport. Laboratory experiments were conducted in a fabricated...
Developing robust model for retrieving sea surface current from RADARSAT-1 SAR satellite data
November 2011
This paper introduces a new approach for retrieving sea surface current from RADARSAT-1 SAR standard beam mode (S2) data. In doing so, the robust algorithm that involves the wavelength diversity ambiguity resolving (WDAR) and multi look beat frequency (MLBF) algorithms was used to remove Doppler Centroid ambiguity. The result shows that the proposed robust algorithm can acquire accurate Doppler...
Polarization synthetic aperture radar (SAR) data for mapping coastal zone vegetation
November 2011
Coastal vegetation is one of the important natural ecosystems that act as protection from sea wave erosion phenomena and supply oxygen to the surrounding organisms. POLSAR data with multi-band and multi-polarization is selected for these studies which are acquired on September 19, 2000, for coastal vegetation mapping. Two methods are performed to CVV, LHH and LHV bands: Polarization signature...
Flood management to prevent flooding damages in western Black Sea region in Turkey
November 2011
River flooding is the most frequently experienced natural hazard all over the World. The effects of flooding are mainly related to the function of the intensity and distribution of precipitation, and the rate of filtration of water into the soil and rock, vegetation and topography. Flood management is considered as one of the basic strategies that can reduce flood damages and in this context, flood protection...
Towards a more sustainable surface raw water tariff structure in the Vaal basin: A situational analysis
November 2011
With an increasingly urbanised population, further study was necessary to determine if water could be used more efficiently by applying efficient tariff structures in combination with decision support tools in the form of models. This paper highlighted challenges towards establishing a sustainable surface raw water tariff structure. Limitations of using the pollute-pays principle for setting a surface raw...
Adaptive feature extraction and mapping for mobile robots in unknown environment
November 2011
This paper proposes a new approach for feature and line extraction use in mobile robot mapping with high accuracy, efficient speed and low complexity to determine line boundaries. This algorithm called modified split and merge (MSAM) is robust against measurement noises and demonstrates satisfactory results on different surfaces. The method is based on the least square method to fit a line to a series of...
A novel method for object detection based on graph theory
November 2011
Ideal object detection result in an image is an optimal free shape sub-window that tightly covers the object of interest. However, the sub-windows considered in widely-used sliding window method are limited to rectangles. This paper proposed a new graph-theoretic method which allowed the detection sub-window to be any shape for object detection. Firstly, local features responses were calculated by...
Frenet-Serret motion and ruled surfaces with constant slope
November 2011
In this paper, we study Frenet-Serret motion and ruled surfaces with constant slope in Euclidean 3-space. By applying Frenet-Serret motion to the points of a cone, we obtain ruled surfaces with constant slope and we investigate these surfaces. We give the definition of a Smarandache curve in Euclidean 3-space. Also, we define a new type of general helix curves on a ruled surface in Euclidean...
Flow of an incompressible micropolar fluid through an elliptic pipe under a constant pressure gradient
November 2011
The study of the flow through pipes and channels either closed or open is a classical problem. In this paper, we make a theoretical investigation of the flow of an incompressible micropolar fluid through a straight elliptic pipe of uniform cross section under a constant pressure gradient. In any micropolar fluid flow problem, there is a need to determine two independent flow field vectors which...
The exp-function method for new exact solutions of the nonlinear partial differential equations
November 2011
In this article, the exp-function method is used to construct some new exact solitary wave solutions of the sixth-order Boussinesq equation and the regularized long wave equations. These equations play very important role in mathematical physics, engineering sciences and applied mathematics. The exp-function method is a powerful and straightforward mathematical tool for solving nonlinear evolution...
Structure elucidation of three new diterpene glycosides from Stevia rebaudiana
November 2011
Three new minor diterpene glycosides were isolated from the commercial extract of the leaves of Stevia rebaudiana and their structures were identified as 13-[(2-O-b-D-glucopyranosyl-b-D-glucopyranosyl)oxy] ent-kaur-15-en-19-oic acid b-D-glucopyranosyl ester (1),13-[(2-O-b-D-glucopyranosyl-3-O-b-D-glucopyranosyl-b-D-glucopyranosyl)oxy]ent-kaur-15-en-19-oic...
Synthesis, structure elucidation and DFT studies of new thiadiazoles
November 2011
A series of previously unavailable derivatives of coumarins were synthesized via the reaction of 4-hydroxycoumarin with ethyl bromoacetate which were then cyclized with thiosemicarbazide. The structures of all synthesized compounds were confirmed by nuclear magnetic resonance (NMR) and infra red (IR) spectroscopic techniques in addition to the use of elemental analysis method (CHN). Selected optimized...
Experimental investigation of spray characteristics of refined bleached and deodorized palm oil and diesel blends using phase Doppler particle analyzer
November 2011
The unstable oil prices in the world market lead many countries to seek an alternative fuel to substitute petroleum oil. Palm oil derived fuel is one of such alternatives, which can be used as fuel in several methods, such as preheating, blending with other petroleum fuels, trans-esterification and etc. The objective of this paper is to characterize the spray of the refined, bleached, and deodorized palm oil...
Study of the electrochemical redox characteristics of some thiadiazoles and their derivatives
November 2011
An electrochemical study related to the redox characteristics of 2-arylaldehydehydrazono-3-phenyl-5-substituted-2,3-dihydro-1,3,4-thiadiazoles (1a-h) in nonaqueous solvents such as 1,2-dichloroethane (DCE), dichloromethane (DCM), acetonitrile (AN),dimethylsulphoxide (DMSO) and tetrahydrofurane (THF) using 0.1 mol dm-3 tetrabutylammonium perchlorate (TBAP) as a supporting electrolyte at platinum...
Structural, optical and electrical properties of ZnO thin films grown by radio frequency (rf) sputtering in oxygen atmosphere
November 2011
Growth conditions for ZnO thin films were found for their potential use as a buffer layer in CdTe/CdS solar cells. Electrical, optical and structural properties were investigated as a function of the oxygen pressure during the growth of ZnO by radio frequency (rf) sputtering. The electrical behavior is explained in terms of the structural properties. Our results suggest that optimal oxygen partial pressure is...
Three-dimensional coastal water front reconstruction from RADARSAT-1 synthetic aperture radar (SAR) satellite data
November 2011
This paper presents work done to utilize RADARSAT-1 synthetic aperture radar (SAR) data to reconstruct 3-D of coastal water front. The velocity bunching model was used to extract the significant wave height from RADARSAT-1 SAR, while the Volterra model was used to model the front movements. B-spline also was implemented to reconstruct the front into 3-D. This study shows that the integration between...
Eigen spectra for Manning-Rosen potential including a Coulomb-like tensor interaction
November 2011
We have obtained analytically the approximate energy equation and the corresponding wave functions of the Dirac equation for the Manning-Rosen potential coupled with a Coulomb-like tensor under the condition of the pseudo-spin symmetry using the parametric generalization of the Nikiforov-Uvarov method. The special cases of the Manning-Rosen potential for spin-1/2 particle were briefly discussed. Numerical...
The effect of top quark mass on three jet rate and measurement of strong coupling constant
November 2011
We present the calculation of top quark mass corrections to three-jet rates in electron-positron annihilation at center of mass energies of 60 and 206 GeV. Furthermore, we also calculate the effects of quark-antiquark interactions on QCD model for three-jet rates. We extract the strong coupling constant, αs, through our results from the massive three-jet rate and the massless one. We observe that the...
Quality of experience key metrics framework for network mobility user
November 2011
This paper presents a new framework of Quality of Experience (QoE) in mobile network. The user acceptance of a mobile application depends on the application’s perceived QoE. Currently, there is no comprehensive framework which integrates QoE and Quality of Service (QoS). The components of framework consist of the network mobility users, traffic classification matrixes and QoE key metric. The performance...
Aerodynamic study of greenhouses using computational fluid dynamics
November 2011
In the last decade, computational fluid dynamics (CFD) has been used to evaluate ventilation on agricultural facilities, mainly on greenhouses. However, there is lack of information on aerodynamic design on greenhouses. In this work, a CFD model has been used to evaluate wind forces over plastic greenhouse covers. Two different greenhouse geometries plane and round, were studied. The effect of wind velocity...
Stresses in a spherical shell by using Lebesgue measure concept
November 2011
The problem of elastic-plastic transition stresses in a spherical shell under internal pressure has been solved by using Lebesgue measure temperature with the concept of generalized strain measure. It has been seen that the results are similar to those given by Hulsurkar (1963). Key words: Creep, compressibility, spherical shell, pressure, Lebesgue measure, transitional stress.
Analyzing the geometric accuracy of simple shaped reference object models created by terrestrial laser scanners
November 2011
There has been a tremendous amount of research on accuracy, precision and sensitivity of terrestrial laser scanning (TLS) technology from the day it has been first used till today. In this article, geometric and nominal measurements of 3-dimensional (3D) models gathered by scanning object surfaces using TLS were compared to the measurements of real reference models. For this purpose, in order to determine the...
Some iterative algorithms for solving regularized mixed quasi variational inequalities
November 2011
In this paper, we use the auxiliary principle technique coupled with the principle of iterative regularization to suggest and analyze some new iterative algorithms for solving mixed quasi variational inequalities. We also study the convergence criteria of these algorithms under some suitable and mild conditions. Several special cases are also considered. Results obtained in this paper continue to hold for...
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