In this paper, two transit problems which pass through the ε-neighborhood of some given objective states in turn from an arbitrary initial state will be studied for both continuous-time and discrete-time switched linear systems with constant input. At first the quadratic stabilization problem for continuous-time switched linear systems with constant input will be investigated. Next, the same problem for discrete-time switched linear systems with constant input will be studied. After that two ε-transit problems by using switched linear systems with constant input via state-dependent switching will be formulated, and then solvability conditions will be given. Further, two illustrative numerical examples will be shown.
{"title":"Quadratic Stabilization and Transit Problems for Switched Linear Systems via State Feedback","authors":"N. Otsuka, Shota Sekiguchi","doi":"10.1109/MCSI.2016.033","DOIUrl":"https://doi.org/10.1109/MCSI.2016.033","url":null,"abstract":"In this paper, two transit problems which pass through the ε-neighborhood of some given objective states in turn from an arbitrary initial state will be studied for both continuous-time and discrete-time switched linear systems with constant input. At first the quadratic stabilization problem for continuous-time switched linear systems with constant input will be investigated. Next, the same problem for discrete-time switched linear systems with constant input will be studied. After that two ε-transit problems by using switched linear systems with constant input via state-dependent switching will be formulated, and then solvability conditions will be given. Further, two illustrative numerical examples will be shown.","PeriodicalId":421998,"journal":{"name":"2016 Third International Conference on Mathematics and Computers in Sciences and in Industry (MCSI)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124030375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
With all features and resources, such as: social actors, social relations, content, communication, and ratings that todays' social networks like Facebook, LinkedIn, Twitter, Google+, etc. offer to users, it still appears that at given point we have to refine and optimize our own accounts within the limits of a certain social network. In line with this trend, in this paper we present a model for efficient management of friends list in Facebook, as one of the limited resource in this social network. In order to get users data from Facebook, a web scraping technique combined with reverse image search has been adopted to ensure users authenticity. The activity between nodes (friends) on a social network is calculated based on their interactions in terms of likes, comments, shares and posts between each other. This approach led us into designing and implementing an algorithm based in these collaborative metrics, named "weight of relationship". This algorithm calculates weights between friends on a network, and the results are evaluated by comparing these weights with respondent answers, conducted through personalized questionnaire. Consequently, this methodology brings feasible results, with an average accuracy of 71% on recommending which friends should be removed, thus releasing the space for incoming new friends. An app named RateMyFriends is developed based on presented approach.
{"title":"Using Collaborative Based Algorithm for Efficient Management of Limited Resources on Social Networks","authors":"Valon Xhafa, Korab Rrmoku, Blerim Rexha","doi":"10.1109/MCSI.2016.060","DOIUrl":"https://doi.org/10.1109/MCSI.2016.060","url":null,"abstract":"With all features and resources, such as: social actors, social relations, content, communication, and ratings that todays' social networks like Facebook, LinkedIn, Twitter, Google+, etc. offer to users, it still appears that at given point we have to refine and optimize our own accounts within the limits of a certain social network. In line with this trend, in this paper we present a model for efficient management of friends list in Facebook, as one of the limited resource in this social network. In order to get users data from Facebook, a web scraping technique combined with reverse image search has been adopted to ensure users authenticity. The activity between nodes (friends) on a social network is calculated based on their interactions in terms of likes, comments, shares and posts between each other. This approach led us into designing and implementing an algorithm based in these collaborative metrics, named \"weight of relationship\". This algorithm calculates weights between friends on a network, and the results are evaluated by comparing these weights with respondent answers, conducted through personalized questionnaire. Consequently, this methodology brings feasible results, with an average accuracy of 71% on recommending which friends should be removed, thus releasing the space for incoming new friends. An app named RateMyFriends is developed based on presented approach.","PeriodicalId":421998,"journal":{"name":"2016 Third International Conference on Mathematics and Computers in Sciences and in Industry (MCSI)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121578681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tibor Csóka, J. Polec, Filip Csoka, K. Kotuliaková
Realistic binary error process models are particularly important for proper design of throughput increasing techniques, such as Forward Error Correction (FEC), Automatic Repeat Request (ARQ), hybrid ARQ or cross-layer optimization. Currently employed models are capable of producing realistic output for binary error process observed on the error control channel, however, most of them (including standard Gilbert and generalized Elliot's model) encounter significant limitations when modeling the binary error process of the logical channel. The proposed novel classification-based vector quantization (VQ) model is designed specifically to produce realistic error burst and error gap process of the binary error process regardless of binary channel type, also retaining high precision of the overall cluster error probability characteristic. The proposed model's precision was verified using standard statistical distances against a real wireless sensor network logical channel trace. Furthermore, the Pearson's goodness of fit test was used to verify viability of the proposed model variants. Multiple variants demonstrate both high precision and successfully pass the goodness of fit test.
{"title":"Classification-Based VQ Model for Simulation of Binary Error Process on the Wireless Channel","authors":"Tibor Csóka, J. Polec, Filip Csoka, K. Kotuliaková","doi":"10.1109/MCSI.2016.025","DOIUrl":"https://doi.org/10.1109/MCSI.2016.025","url":null,"abstract":"Realistic binary error process models are particularly important for proper design of throughput increasing techniques, such as Forward Error Correction (FEC), Automatic Repeat Request (ARQ), hybrid ARQ or cross-layer optimization. Currently employed models are capable of producing realistic output for binary error process observed on the error control channel, however, most of them (including standard Gilbert and generalized Elliot's model) encounter significant limitations when modeling the binary error process of the logical channel. The proposed novel classification-based vector quantization (VQ) model is designed specifically to produce realistic error burst and error gap process of the binary error process regardless of binary channel type, also retaining high precision of the overall cluster error probability characteristic. The proposed model's precision was verified using standard statistical distances against a real wireless sensor network logical channel trace. Furthermore, the Pearson's goodness of fit test was used to verify viability of the proposed model variants. Multiple variants demonstrate both high precision and successfully pass the goodness of fit test.","PeriodicalId":421998,"journal":{"name":"2016 Third International Conference on Mathematics and Computers in Sciences and in Industry (MCSI)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131911894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Konstantina Gkotzia, G. Tsekouras, F. Kanellos, P. Michalopoulos, J. Prousalidis, N. Mastorakis
Nowadays the propulsion electrification of ships is under intensive research. During this course, a very attractive option is the use of shaft electric machines, which is an intermediate step between the classic ship configuration and the all-electric one. However, two problems arise: (1) power dispatch should be carried out based on the Lagrange method or dynamic models, instead of simplistic methods related to the proportional rule of nominal active powers of generators, which is currently used in ships, (2) the installation of shaft generators should be examined systematically from the economic point view. In previous papers, the authors have solved the first one. In this paper, the mathematical basis for the techno-economic study of the installation of shaft generators in a ship is presented. It is using power dispatch based on the Lagrange method and is taking into consideration the basic technical limitations of the engines. Afterwards, it is applied in a general purpose ship and sensitivity analysis is carried out with respect to fuel price, operational life period, rate of interest, ship propulsion power duration curve etc. The results indicate the main factors which influence the economic sustainability of using shaft generators.
{"title":"Shaft-Generators in Ships: Techno-Economic Sensitivity Analysis Study","authors":"Konstantina Gkotzia, G. Tsekouras, F. Kanellos, P. Michalopoulos, J. Prousalidis, N. Mastorakis","doi":"10.1109/MCSI.2016.015","DOIUrl":"https://doi.org/10.1109/MCSI.2016.015","url":null,"abstract":"Nowadays the propulsion electrification of ships is under intensive research. During this course, a very attractive option is the use of shaft electric machines, which is an intermediate step between the classic ship configuration and the all-electric one. However, two problems arise: (1) power dispatch should be carried out based on the Lagrange method or dynamic models, instead of simplistic methods related to the proportional rule of nominal active powers of generators, which is currently used in ships, (2) the installation of shaft generators should be examined systematically from the economic point view. In previous papers, the authors have solved the first one. In this paper, the mathematical basis for the techno-economic study of the installation of shaft generators in a ship is presented. It is using power dispatch based on the Lagrange method and is taking into consideration the basic technical limitations of the engines. Afterwards, it is applied in a general purpose ship and sensitivity analysis is carried out with respect to fuel price, operational life period, rate of interest, ship propulsion power duration curve etc. The results indicate the main factors which influence the economic sustainability of using shaft generators.","PeriodicalId":421998,"journal":{"name":"2016 Third International Conference on Mathematics and Computers in Sciences and in Industry (MCSI)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133301499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper examines various types of networks their characteristics and parameters. It is also looks in current ongoing research on the field of localization and positioning and work related with localization that doesn't take into account the parameter of distance between SRs. Another type of localization is also commented which is the localization in Telemetry. In addition, issues of network coverage and topology are analyzed. Network hole problems are also examined as they are of high importance when a network has to perform accurately and with a minor number of areas that are problematic or may degrade it's performance. It is easily understood that a network's overall performance is affected by a combination of attributes that need to be examined on a case by case basis.
{"title":"Sensors Networks - Localization and Topology","authors":"M. Sfendourakis, R. Nilavalan, E. Antonidakis","doi":"10.1109/MCSI.2016.036","DOIUrl":"https://doi.org/10.1109/MCSI.2016.036","url":null,"abstract":"This paper examines various types of networks their characteristics and parameters. It is also looks in current ongoing research on the field of localization and positioning and work related with localization that doesn't take into account the parameter of distance between SRs. Another type of localization is also commented which is the localization in Telemetry. In addition, issues of network coverage and topology are analyzed. Network hole problems are also examined as they are of high importance when a network has to perform accurately and with a minor number of areas that are problematic or may degrade it's performance. It is easily understood that a network's overall performance is affected by a combination of attributes that need to be examined on a case by case basis.","PeriodicalId":421998,"journal":{"name":"2016 Third International Conference on Mathematics and Computers in Sciences and in Industry (MCSI)","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132973996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In recent times, we may notice some new designs of underwater vehicles, which imitate living underwater organisms, e.g. a fish. These vehicles are called biomimetic. They are driven by undulating propulsion, imitating wavy motion of fins. In the paper, problem of mathematical modeling of underwater vehicle with undulating propulsion is undertaken. This model can be used, e.g. for initial tuning of control system of new underwater vehicles.
{"title":"Mathematical Model of Underwater Vehicle with Undulating Propulsion","authors":"P. Szymak","doi":"10.1109/MCSI.2016.057","DOIUrl":"https://doi.org/10.1109/MCSI.2016.057","url":null,"abstract":"In recent times, we may notice some new designs of underwater vehicles, which imitate living underwater organisms, e.g. a fish. These vehicles are called biomimetic. They are driven by undulating propulsion, imitating wavy motion of fins. In the paper, problem of mathematical modeling of underwater vehicle with undulating propulsion is undertaken. This model can be used, e.g. for initial tuning of control system of new underwater vehicles.","PeriodicalId":421998,"journal":{"name":"2016 Third International Conference on Mathematics and Computers in Sciences and in Industry (MCSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123958657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This emergence of the heterogeneous computing is based mainly on various forms of parallel accelerators. We present a family of accelerators for embedded computation with a map-reduce architecture based on the partial recursive functions computation model introduced by Stephen Kleene. A three-level virtual prototyping environment is provided to support the development of embedded applications. The first level is written in a Lisp-like functional language. The second is a C-like environment which segregates the intense part of the computation from the complex part. The last one is a low level simulator able to provide support for advanced optimizations. The environment is designed for developing applications by tuning the architecture of a family of many-core machines which provide high performance per Watt and cm2. The energy efficiency of processors backing our architectural approach is in the range of 10 pJ/flop evaluated for the standard cell 28nm technology.
{"title":"Functional Virtual Prototyping Environment for a Family of Map-Reduce Embedded Accelerators","authors":"Călin Bîră, G. Stefan, M. Malita","doi":"10.1109/MCSI.2016.037","DOIUrl":"https://doi.org/10.1109/MCSI.2016.037","url":null,"abstract":"This emergence of the heterogeneous computing is based mainly on various forms of parallel accelerators. We present a family of accelerators for embedded computation with a map-reduce architecture based on the partial recursive functions computation model introduced by Stephen Kleene. A three-level virtual prototyping environment is provided to support the development of embedded applications. The first level is written in a Lisp-like functional language. The second is a C-like environment which segregates the intense part of the computation from the complex part. The last one is a low level simulator able to provide support for advanced optimizations. The environment is designed for developing applications by tuning the architecture of a family of many-core machines which provide high performance per Watt and cm2. The energy efficiency of processors backing our architectural approach is in the range of 10 pJ/flop evaluated for the standard cell 28nm technology.","PeriodicalId":421998,"journal":{"name":"2016 Third International Conference on Mathematics and Computers in Sciences and in Industry (MCSI)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124124632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper discusses the development of a neural network array model for predicting the radiation performance characteristics of the horn fed parabolic reflector and the dipole fed corner satellite antennas. A number of neural networks were developed in order to predict the radiation characteristics for various combinations of the design parameters. The results obtained from the neural network array models were compared to those from a commercial design software and found in close agreement. The proposed method can predict in less time and with minimum computational resources, the performance characteristics of a horn fed parabolic reflector antenna with high accuracy.
{"title":"Radiation Performance of Satellite Reflector Antennas Using Neural Networks","authors":"T. Kapetanakis, I. Vardiambasis","doi":"10.1109/MCSI.2016.026","DOIUrl":"https://doi.org/10.1109/MCSI.2016.026","url":null,"abstract":"This paper discusses the development of a neural network array model for predicting the radiation performance characteristics of the horn fed parabolic reflector and the dipole fed corner satellite antennas. A number of neural networks were developed in order to predict the radiation characteristics for various combinations of the design parameters. The results obtained from the neural network array models were compared to those from a commercial design software and found in close agreement. The proposed method can predict in less time and with minimum computational resources, the performance characteristics of a horn fed parabolic reflector antenna with high accuracy.","PeriodicalId":421998,"journal":{"name":"2016 Third International Conference on Mathematics and Computers in Sciences and in Industry (MCSI)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124543595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In an underlay spectrum sharing environment, relay selection stands as one of the fascinating techniques to address the challenge of performance enhancement of secondary communication via cognitive relays. In this paper, a similar constrained optimization problem is discussed in which a secondary source-destination pair is assisted by a potential Relay assisted Cognitive Radio (RCRN) in the worst-case scenario when line-of-sight (LOS) path is not available to enable the communication. In order to solve this sophisticated problem, we perform multiple relay selection under the assumption of availability of perfect channel state information (CSI) and propose two novel techniques, one based on Artificial Bee Colony (ABC) evolutionary computing and the second based on Fuzzy Rule Based System (FRBS). Both proposed techniques aim to maximize the signal-to-noise ratio (SNR) at the destination keeping in view the transmit power and interference constraints. The effectiveness of the schemes is highlighted through simulation results, along with their comparison.
{"title":"Performance Enhancement of Underlay Cognitive Radio Networks by Intelligent Multiple Relay Selection","authors":"K. Sultan, B. Zafar, M. Zubair, Z. Khan","doi":"10.1109/MCSI.2016.038","DOIUrl":"https://doi.org/10.1109/MCSI.2016.038","url":null,"abstract":"In an underlay spectrum sharing environment, relay selection stands as one of the fascinating techniques to address the challenge of performance enhancement of secondary communication via cognitive relays. In this paper, a similar constrained optimization problem is discussed in which a secondary source-destination pair is assisted by a potential Relay assisted Cognitive Radio (RCRN) in the worst-case scenario when line-of-sight (LOS) path is not available to enable the communication. In order to solve this sophisticated problem, we perform multiple relay selection under the assumption of availability of perfect channel state information (CSI) and propose two novel techniques, one based on Artificial Bee Colony (ABC) evolutionary computing and the second based on Fuzzy Rule Based System (FRBS). Both proposed techniques aim to maximize the signal-to-noise ratio (SNR) at the destination keeping in view the transmit power and interference constraints. The effectiveness of the schemes is highlighted through simulation results, along with their comparison.","PeriodicalId":421998,"journal":{"name":"2016 Third International Conference on Mathematics and Computers in Sciences and in Industry (MCSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124799099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Evangelos A. Kokkinos, Ilias Peteinatos, R. Nilavalan
The aim of this work is to study the capacity of the three dimensional cellular Air-to-Ground system. Calculations have been done through simulations of the Outside Cell Interference Factor (OCIF), for reverse and forward link, by using seven rings of interfering cells around the desired cell, for various values of the maximum height of the cell and its radius. A Case Study for the major Greek airports has been made in which the number of the users per cell is being calculated for voice service of 12.2 kbps.
{"title":"Interference Calculations for Aeronautical Communications Using Cells in Greek Airspace","authors":"Evangelos A. Kokkinos, Ilias Peteinatos, R. Nilavalan","doi":"10.1109/MCSI.2016.031","DOIUrl":"https://doi.org/10.1109/MCSI.2016.031","url":null,"abstract":"The aim of this work is to study the capacity of the three dimensional cellular Air-to-Ground system. Calculations have been done through simulations of the Outside Cell Interference Factor (OCIF), for reverse and forward link, by using seven rings of interfering cells around the desired cell, for various values of the maximum height of the cell and its radius. A Case Study for the major Greek airports has been made in which the number of the users per cell is being calculated for voice service of 12.2 kbps.","PeriodicalId":421998,"journal":{"name":"2016 Third International Conference on Mathematics and Computers in Sciences and in Industry (MCSI)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122563429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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