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2014
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79
Sizing Optimization of Truss Structures Under Frequency Constraints with Artificial Bee Colony Algorithm
Sizing Optimization of Truss Structures Under Frequency Constraints with Artificial Bee Colony Algorithm
en
en
Due the wide applications of truss structures in industries including aviation, transportation, buildings and vital structures, design and optimization of these structures have became the most active research fields. Furthermore it turns out that in many of structures that have been exposed to wind, hurricanes or violent earthquake, the optimization according weight only is not an appropriate way. So recently, many efforts have been made according natural frequencies optimization and minimization of weight. Due to the importance of optimization and control of natural frequencies in structures and to avoid resonance, calculating of natural frequencies of the truss structures in different moods based on minimization of weight have been focused. To reach this goal method have been used in this research, optimization by Artificial Bee Colony algorithm (ABC). Optimized structures are a planar 10-bar truss and a space 72-bar truss. Conclusions show these method have better quality than other algorithms and they can use engineering complex structures optimization.
77
88
M. Mashinchi
Joubari
M. H.
Pashaei
A.
Fathi
Size optimization
Truss structures
Artificial Bee Colony algorithm
Frequency constraints
Engineering design
Article.1.pdf
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]
Common Fixed Point Results for R - Weakly Commuting Mappings in Generalized Fuzzy Metric Spaces
Common Fixed Point Results for R - Weakly Commuting Mappings in Generalized Fuzzy Metric Spaces
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en
In this paper, we prove two common fixed point theorems involving R-weakly commuting mappings in the context of \(M\)-fuzzy metric spaces. Our results generalizes the earlier results of Pant [8], Vasuki [15] and Som [13,14] in fuzzy metric spaces.
89
102
R.
Muthuraj
R.
Pandiselvi
S.
Manro
\(M\)-fuzzy metric spaces
\(R\)-Weakly Commuting mappings.
Article.2.pdf
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T. Som, Some results on common fixed point in fuzzy metric spaces, Soochow J. Math., 33(4) (2007), 553-561
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Virendra Singh Chouhan, A. Ganguly, Convergence of Common Fixed Point Theorems in Fuzzy Metric Spaces, Journal of mathematics and computer science , 8 (2014), 93-97
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]
Some Notes on the Convergence Control Parameter in the Framework of the Homotopy Analysis Method
Some Notes on the Convergence Control Parameter in the Framework of the Homotopy Analysis Method
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The convergence control parameter and the technique of \(c_0\)-curves is an unavoidable part of any homotopy analysis method work. The mathematical background of this parameter has been studied by other authors. Here we revisit this parameter and its essence; we mention that in some examples the parameter may fail to work. Also we give some comments in using the technique of \(c_0\)-curves and show, through examples, that a misusage may lead the user to wrong results.
103
110
Jamshid
Saeidian
Shahnam
Javadi
Homotopy analysis method
Convergence-control parameter
Technique of \(c_0\)-curves.
Article.3.pdf
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]
Comparison Between Topological Properties of Hyperx and Generalized Hypercube for Interconnection Networks
Comparison Between Topological Properties of Hyperx and Generalized Hypercube for Interconnection Networks
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en
In order to design an interconnection network, it is essential to have a comprehensive understanding about properties and limitations of the network. These properties and limitations are characterized by the topology of the network. Since a topology sets constraints and costs, it plays a critical role in all interconnection networks. Different topologies have been proposed for interconnection networks in literature. The Generalized Hypercube is one of the oldest topologies that can be mentioned. Recently a group of researchers at HP Lab have introduced a new topology for these networks, called HyperX. Despite of many similarities between these two topologies, there are significant differences between their performances and costs. It seems that this important issue has been neglected in contexts of interconnection networks. In this paper, we compare HyperX and Generalized Hypercube topologies under some key topological measures. We show that HyperX is somehow better than Generalized Hypercube in the sense of topological properties.
111
122
Sadoon
Azizi
Naser
Hashemi
Mohammad Amiri
Zarandi
Topological properties
HyperX
Generalized Hypercube
Interconnection Networks
Performance.
Article.4.pdf
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[1]
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J. H. Ahn, N. Binkert, A. Davis, M. McLaren, R. S. Schreiber, HyperX: Topology, Routing, and Packaging of Efficient Large-Scale Networks, Proceedings of the Conference on High Performance Computing Networking, Storage and Analysis, (2009), 1-11
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]
Relation of Cio Roles, it and Business Alignment, and Organizational Performance
Relation of Cio Roles, it and Business Alignment, and Organizational Performance
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en
The ability to achieve business goals through IT is an important factor for the performance of organizations. One factor which affects the return of investment (ROI) in IT is strategic alignment of business and IT. Purpose of this study is to identify factors that affect the alignment of IT and business in the Iranian organizations. In this study the role and responsibilities of chief information officers (CIO) and their performance relationships with IT and business alignment and improvement of organizational performance are evaluated in the Iranian organizations. 80 IT professionals and managers from different Iranian organizations, who are identified by the State Scientific Research and Policy Center, responded to questions of this research through a website. Obtained results indicated that direct report to the chief executive by CIO and CIO membership in the executive committee improves IT services of the business. Findings show that the CIO has a key role in the alignment of business and IT. Limitations and problems of IT are properly understood by the CIO, therefore they can help to prepare appropriate IT and business strategies and consequently improve the performance of organizations.
123
132
Saeed
Ayat
Sodeif
Farajkhah
Business alignment
CIO role
competitive advantage
strategic planning
ROI.
Article.5.pdf
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[1]
S. Farajkhah, S. Ayat, Identifying and prioritizing the factors affecting the role of chief information officer in the current and future business, proc. CISIS , 11 (2011), 329-332
##[2]
M. Mehrizizadeh, The role of ICT in knowledge management, Sharif University of Technology, masters thesis (2005)
##[3]
A. Arabscorch, Providing a model for assessing organizational readiness for strategic IT and business alignment, masters thesis , Tehran University of Technology Management (2005)
##[4]
M. Khaki, Provide a model for assessing organizational readiness to conduct successful strategic planning of information systems and information technology, masters thesis, Tehran University of Technology Management (2004)
##[5]
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##[6]
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##[7]
M. G. Sobol, G. Klein, Relation of CIO background, IT infrastructure, and economic performance, Information & Management Journal, 46 (2009), 271-278
##[8]
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]
Simulating Nonhomogeneous Poisson Point Process Based on Multi Criteria Intensity Function and Comparison with Its Simple Form
Simulating Nonhomogeneous Poisson Point Process Based on Multi Criteria Intensity Function and Comparison with Its Simple Form
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en
In this paper we first study the general nonhomogeneous Poisson point process based on strict form of
an intensity function and its algorithm for generating it. Then, we employ multi criteria intensity
function instead of simple form and establish a new algorithm, then we compare the efficiency of our
new algorithm based on this modified intensity function.
133
138
Behrouz
Fathi-vajargah
Hassan
Khoshkar-foshtomi
Intensity function
Nonhomogeneous Poisson point process
Simulation.
Article.6.pdf
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[1]
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]
Analytical Disturbance Modeling of a Flywheel Due to Statically and Dynamically Unbalances
Analytical Disturbance Modeling of a Flywheel Due to Statically and Dynamically Unbalances
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en
Unbalances in rotational machines can’t delete completely somehow for precise mechanism it is necessary to control vibration due to such disturbances. In this research two common disturbance resources (dynamically and statically unbalances) for a flywheel on a rigid shaft modeled and energy methods used to derive equation of motion in five degrees of freedom. Equations linearized due to small vibration and disturbance forces and torques achieved. The model use to define design criteria for accepted level of unbalances in precise machines like real flywheel with known parameters used in a control system of a satellite.
139
148
Amir
Karimian
Saied
Shokrollahi
Shahram
Yousefi
Alireza
Aghalari
reaction wheel
unbalances
disturbances.
Article.7.pdf
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[1]
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]
Measuring Cohesion and Coupling of Object-oriented Systems
Measuring Cohesion and Coupling of Object-oriented Systems
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en
Cohesion and coupling are considered amongst the most important properties to evaluate the quality of a design. In the context of OO software development, cohesion means relatedness of the public functionality of a class whereas coupling stands for the degree of dependence of a class on other classes in OO system. Given two lines of code, A and B, they are coupled when B must change behavior only because A changed. They are cohesive when a change to A allows B to change so that both add new value. In this paper, a new metric has been proposed that measures the class cohesion on the basis of relative relatedness of the public methods to the overall public functionality of a class. The proposed metric for class cohesion uses a new concept of subset tree to determine relative relatedness of the public methods to the overall public functionality of a class. A set of metrics has been proposed for measuring class coupling based on three types of UML relationships, namely association, inheritance and dependency. The reasonable metrics to measure cohesion and coupling are supposed to share the same set of input data. Sharing of input data by the metrics encourages the idea for the existence of mutual relationships between them.
149
156
Mahdi
Saadati
Homayoon
Motameni
class cohesion
class coupling
dependency
inheritance
association.
Article.8.pdf
[
[1]
J. Bieman, L. Ott, Measuring functional cohesion, IEEE Trans. Software Engineering, 20(8) (1994), 644-657
##[2]
James M. Bieman, Byung-Kyooh Kang, Measuring Coupling and Cohesion: An Information-Theory Approach, Edward B. Allen, Taghi M. Khoshgoftaar, Florida Atlantic University, Boca Raton, Florida USA ()
##[3]
S. Chidamber, C. Kemerer, Measurement of Cohesion and Coupling in OO Analysis Model Based on Crosscutting Concerns, O. Ormandjieva, M. Kassab, C. Constantinides, , 20 (1994), 476-493
##[4]
Dirk Beyer, Claus Lewerentz, Frank Simon, Measuring Cohesion and Coupling of Object-Oriented Systems - Derivation and Mutual Study of Cohesion and Coupling, , IWSM (2000)
]