J. Comput. Sci. Technol.最新文献

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Multi-agent Learning by Trial and Error for Resource Leveling during Multi-Project (Re)scheduling 基于试错法的多智能体学习在多项目调度中的资源均衡
J. Comput. Sci. Technol. Pub Date : 2018-10-09 DOI: 10.24215/16666038.18.E14
Laura Tosselli, Verónica Bogado, E. Martínez
{"title":"Multi-agent Learning by Trial and Error for Resource Leveling during Multi-Project (Re)scheduling","authors":"Laura Tosselli, Verónica Bogado, E. Martínez","doi":"10.24215/16666038.18.E14","DOIUrl":"https://doi.org/10.24215/16666038.18.E14","url":null,"abstract":"In a multi-project context within enterprise networks, reaching feasible solutions to the (re)scheduling problem represents a major challenge, mainly when scarce resources are shared among projects. The multi-project (re)scheduling must achieve the most efficient possible resource usage without increasing the prescribed project constraints, considering the Resource Leveling Problem (RLP), whose objective is to level the consumption of resources shared in order to minimize their idle times and to avoid overallocation conflicts. In this work, a multi-agent solution that allows solving the Resource Constrained Multi-project Scheduling Problem (RCMPSP) and the Resource Investment Problem is extended to incorporate indicators on agents’ payoff functions to address the Resource Leveling Problem in a decentralized and autonomous way, through decoupled rules based on Trial-and-Error approach. The proposed agent-based simulation model is tested through a set of project instances that vary in their structure, parameters, number of resources shared, etc. Results obtained are assessed through different scheduling goals, such as project total duration, project total cost and leveling resource usage. Our results are far better compared to the ones obtained with alternative approaches. This proposal shows that the interacting agents that implement decoupled learning rules find a solution which can be understood as a Nash equilibrium.","PeriodicalId":188846,"journal":{"name":"J. Comput. Sci. Technol.","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128957920","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}
引用次数: 1
Formulation of an optimal academic exam 制定一个最佳的学术考试
J. Comput. Sci. Technol. Pub Date : 2018-10-09 DOI: 10.24215/16666038.18.E19
E. Tarifa, Sergio L. Martínez, S. F. Domínguez, Jorgelina F. Argañaraz
{"title":"Formulation of an optimal academic exam","authors":"E. Tarifa, Sergio L. Martínez, S. F. Domínguez, Jorgelina F. Argañaraz","doi":"10.24215/16666038.18.E19","DOIUrl":"https://doi.org/10.24215/16666038.18.E19","url":null,"abstract":"The aim of this paper is to formulate an optimal academic exam for a given subject. To do this, the probability is first modelled of a student passing the exam according to the number of units he studies and the professor evaluates. That simulation model is developed by performing a probabilistic analysis. An optimal exam is then defined as the one that awards the grade that the student deserves. Therefore, in an optimal exam, approve those who deserve to approve, and disapprove those that do not deserve to approve. Besides, this exam must respect the limitations of time and effort that the professor imposes. Based on this definition and using the simulation model, an INLP type optimization model is formulated. This optimization model determines the number of units the professor must evaluate to maximize the probability of getting an optimal exam.","PeriodicalId":188846,"journal":{"name":"J. Comput. Sci. Technol.","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125582486","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}
引用次数: 1
Efficient Iris Recognition Management in Object-Related Databases 对象相关数据库中虹膜识别的高效管理
J. Comput. Sci. Technol. Pub Date : 2018-10-04 DOI: 10.24215/16666038.18.E12
Carlos E. Alvez, E. Miranda, G. Etchart, S. Ruiz-Boqué
{"title":"Efficient Iris Recognition Management in Object-Related Databases","authors":"Carlos E. Alvez, E. Miranda, G. Etchart, S. Ruiz-Boqué","doi":"10.24215/16666038.18.E12","DOIUrl":"https://doi.org/10.24215/16666038.18.E12","url":null,"abstract":"Biometric applications have grown significantly in recent years, particularly iris-based systems. In the present work, an extension of an Object Relational Database Management System for the integral management of a biometric system based on the human iris was presented. Although at present, there are many database extensions for different domains, in no case for biometric applications. The proposed extension includes both the extension of the type system and the definition of domain indexes for performance improvement. The aim of this work is to provide a tool that facilitates the development of biometric applications based on the iris feature. Its development is based on a reference architecture that includes both the management of images of the iris trait, its associated metadata and the necessary methods for both manipulation and queries. An implementation of the extension is performed for PostgreSQL DBMS, and SP-GiST framework is used in the implementation of a domain index. Experiments were carried out to evaluate the performance of the proposed index, which shows improvements in query execution times.","PeriodicalId":188846,"journal":{"name":"J. Comput. Sci. Technol.","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123612567","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}
引用次数: 1
Towards Building Reuse-Based Digital Libraries for National Universities in Patagonia 巴塔哥尼亚国立大学建立可重用数字图书馆的研究
J. Comput. Sci. Technol. Pub Date : 2018-10-04 DOI: 10.24215/16666038.18.E10
A. Cechich, Agustina Buccella, Daniel Manrique, Lucas Perez
{"title":"Towards Building Reuse-Based Digital Libraries for National Universities in Patagonia","authors":"A. Cechich, Agustina Buccella, Daniel Manrique, Lucas Perez","doi":"10.24215/16666038.18.E10","DOIUrl":"https://doi.org/10.24215/16666038.18.E10","url":null,"abstract":"This article presents a case study exploring the use of software product lines and reference models as mechanisms of a reuse-based design process to build digital libraries. As a key component in a modern digital library, the reference architecture is responsible for helping define quality of the resulting repository. It is true that many efforts have been addressed towards providing interoperability; however, repositories are expected to provide high levels of reuse too, which goes beyond that of simple object sharing. This work presents the main steps we followed towards building a reusable digital library capable of accommodating such needs by (i) providing mechanisms to reuse resources, and (ii) enabling explicit sharing of commonalities in a distributed environment.","PeriodicalId":188846,"journal":{"name":"J. Comput. Sci. Technol.","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121780647","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}
引用次数: 0
Unsupervised TOF Image Segmentation through Spectral Clustering and Region Merging 基于光谱聚类和区域合并的无监督TOF图像分割
J. Comput. Sci. Technol. Pub Date : 2018-10-04 DOI: 10.24215/16666038.18.E11
Luciano Lorenti, Javier Giacomantone, O. Bria
{"title":"Unsupervised TOF Image Segmentation through Spectral Clustering and Region Merging","authors":"Luciano Lorenti, Javier Giacomantone, O. Bria","doi":"10.24215/16666038.18.E11","DOIUrl":"https://doi.org/10.24215/16666038.18.E11","url":null,"abstract":"Time of Flight (TOF) cameras generate two simultaneous images, one of intensity and one of range. This allows to tackle segmentation problems in which the separate use of intensity or range information is not enough to extract objects of interest from the 3D scene. In turn, range information allows to obtain a normal vector estimation of each point of the captured surfaces. This article presents a semi-supervised spectral clustering method which combines intensity and range information as well as normal vector orientations to improve segmentation results. The main contribution of this article consists in the use of a statistical region merging as a final step of the segmentation method. The region merging process combines adjacent regions which satisfy a similarity criterion. The performance of the proposed method was evaluated over real images. The use of this final step presents preliminary improvements in the metrics evaluated.","PeriodicalId":188846,"journal":{"name":"J. Comput. Sci. Technol.","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126832246","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}
引用次数: 0
Artificial Bee Colony Algorithm Improved with Evolutionary Operators 基于进化算子的人工蜂群算法
J. Comput. Sci. Technol. Pub Date : 2018-10-04 DOI: 10.24215/16666038.18.E13
Gabriela F. Minetti, C. Salto
{"title":"Artificial Bee Colony Algorithm Improved with Evolutionary Operators","authors":"Gabriela F. Minetti, C. Salto","doi":"10.24215/16666038.18.E13","DOIUrl":"https://doi.org/10.24215/16666038.18.E13","url":null,"abstract":"In this paper, we design, implement, and analysis the replacement of the method to create new solutions in artificial bee colony algorithm by recombination operators, since the original method is similar to the recombination process used in evolutionary algorithms. For that purpose, we present a systematic investigation of the effect of using six different recombination operators for real-coded representations at the employed bee step. All the analysis is carried out using well known test problems. The experimental results suggest that the method to generate a new candidate food position plays an important role in the performance of the algorithm. Computational results and comparisons show that three of the six proposed algorithms are very competitive with the traditional bee colony algorithm.","PeriodicalId":188846,"journal":{"name":"J. Comput. Sci. Technol.","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115603725","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}
引用次数: 1
Optimization of throughput, fairness and energy efficiency on asymmetric multicore systems via OS scheduling 基于OS调度的非对称多核系统吞吐量、公平性和能效优化
J. Comput. Sci. Technol. Pub Date : 2018-06-07 DOI: 10.24215/16666038.18.E09
Adrián Pousa
{"title":"Optimization of throughput, fairness and energy efficiency on asymmetric multicore systems via OS scheduling","authors":"Adrián Pousa","doi":"10.24215/16666038.18.E09","DOIUrl":"https://doi.org/10.24215/16666038.18.E09","url":null,"abstract":"Most of chip multiprocessors (CMPs) are symmetric, i.e. they are composed of identical cores. These CMPs may consist of complex cores (e.g., Intel Haswell or IBM Power8) or simple and lower-power cores (e.g. ARM Cortex A9 or Intel Xeon Phi). Cores in the former approach have advanced microarchitectural features, such as out-of-order super-scalar pipelines, and they are suitable for running sequential applications which use them efficiently. Cores in the latter approach have a simple microarchitecture and are good for running applications with high thread-level parallelism (TLP).","PeriodicalId":188846,"journal":{"name":"J. Comput. Sci. Technol.","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125094520","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}
引用次数: 0
Value-Based Information Systems and Technologies Governance Quality Assessment 基于价值的信息系统和技术治理质量评估
J. Comput. Sci. Technol. Pub Date : 2018-04-25 DOI: 10.24215/16666038.18.E08
V. Rodríguez
{"title":"Value-Based Information Systems and Technologies Governance Quality Assessment","authors":"V. Rodríguez","doi":"10.24215/16666038.18.E08","DOIUrl":"https://doi.org/10.24215/16666038.18.E08","url":null,"abstract":"The quality is a degree of excellence, and what is excellent is new. The evaluations of the quality of the organizations, departments, functional areas, activities, products and services have been recognized by the goodness of their results beginning to be mandatory and of increasingly strict application in the search of the fulfilment of its purposes.","PeriodicalId":188846,"journal":{"name":"J. Comput. Sci. Technol.","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121694874","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}
引用次数: 0
Heuristic Method for Photo-detectors Localization over Continuous Crystal Scintillation Cameras 连续晶体闪烁相机上光电探测器定位的启发式方法
J. Comput. Sci. Technol. Pub Date : 2018-04-25 DOI: 10.24215/16666038.18.E02
R. R. Colmeiro, C. Verrastro
{"title":"Heuristic Method for Photo-detectors Localization over Continuous Crystal Scintillation Cameras","authors":"R. R. Colmeiro, C. Verrastro","doi":"10.24215/16666038.18.E02","DOIUrl":"https://doi.org/10.24215/16666038.18.E02","url":null,"abstract":"The construction process of large scintillation cameras with continuous crystals is a complex problem affected by multiple variables, from the physical construction of the scintillation crystal to the dispersion in the sensibility of photomultiplier tubes. The selection of these variables have a strong impact on the final performance of the scintillation camera. A new method to select photomultiplier is presented in this paper, regarding its gain, making use of k-means clustering and genetic algorithms. The proposed algorithm was tested and applied in the construction of six scintillation cameras for the Argentinean positron emission tomogaph prototype (AR-PET), a problem with more than 10+600 possible configurations. The resulting configuration of the scintillation cameras reduced the software-freecalibration FWHM of the camera from 20% to 15% average.","PeriodicalId":188846,"journal":{"name":"J. Comput. Sci. Technol.","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130288571","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}
引用次数: 0
A Systematic Literature Review in Cross-browser Testing 跨浏览器测试的系统文献综述
J. Comput. Sci. Technol. Pub Date : 2018-04-25 DOI: 10.24215/16666038.18.E03
Leandro N. Sabaren, M. A. Mascheroni, Cristina L. Greiner, E. Irrazábal
{"title":"A Systematic Literature Review in Cross-browser Testing","authors":"Leandro N. Sabaren, M. A. Mascheroni, Cristina L. Greiner, E. Irrazábal","doi":"10.24215/16666038.18.E03","DOIUrl":"https://doi.org/10.24215/16666038.18.E03","url":null,"abstract":"Many users access web pages from different browsers looking for the same user experience in all of them. However, there are several causes that produce compatibility issues. Those defects affect functionalities and user interface components. In this paper we present a systematic literature review which aims to find and summarize existing techniques, tools and challenges related to cross-browser testing. According to the results, the most used technique is the visual analysis. However, there are still challenges to face. The most important challenge is the identification of dynamic components in the user interface. Cross-browser compatibility topics are getting importance according to an increment in published articles. Nevertheless, there are techniques that are not completely developed yet and do not fully support test automation practices.","PeriodicalId":188846,"journal":{"name":"J. Comput. Sci. Technol.","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126976141","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}
引用次数: 5
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