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作者： Cappuccino, G. Corsonello, P. Cocorullo, G. Perri, S. Staino, G. Department of Electronics Computer Science and Systems University of Calabria Rende - CS Italy Department of Electronic Engineering and Applied Mathematics University of Reggio Calabria Reggio Calabria Italy

ISBN: (纸本)0780370570

The dynamic power consumption of a complementary metal-oxide-semiconductor (CMOS) gate driving a resistance-inductance-capacitance (RLC) transmission line is investigated in this paper. The closed-form solution for the dynamic power has been carried out by a simple time domain model for input impedance of a lossy transmission line, specifically developed to be used in conjunction with MOS macromodels. The proposed solution agrees with circuit simulations within 1% error for a wide range of line parameters, and it demonstrates how power dissipation localized in the wire resistance may be a significant aliquot of the global power consumption. © 2001 IEEE.

关键词： Circuit simulation

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Semi-analytical finite element method applied for characterizing micropolar fibrous composites

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applied mathematics and Mechanics(English Edition) 2024年第12期45卷 2147-2164页

作者： J.A.OTERO Y.ESPINOSA-ALMEYDA R.RODRIGUEZ-RAMOS J.MERODIO School of Engineering and Sciences Monterrey Institute of TechnologyEstado de Mexico 52926Mexico Institute of Engineering and Technology Autonomous University of Ciudad JuarezCiudad JuarezChihuahua 32310Mexico Postgraduate Program in Computational Modeling in Science and Technology Federal Fluminense UniversityRıo de Janeiro 27255-125Brazil Faculty of Mathematics and Computer Science University of HavanaLa Habana 10400Cuba Department of Mathematics Applied to ICT School of Informatics Systems EngineeringTechnical University of MadridMadrid 28031Spain

A semi-analytical finite element method(SAFEM),based on the two-scale asymptotic homogenization method(AHM)and the finite element method(FEM),is implemented to obtain the effective properties of two-phase fiber-reinforced composites(FRCs).The fibers are periodically distributed and unidirectionally aligned in a homogeneous *** framework addresses the static linear elastic micropolar problem through partial differential equations,subject to boundary conditions and perfect interface contact *** mathematical formulation of the local problems and the effective coefficients are presented by the *** local problems obtained from the AHM are solved by the FEM,which is denoted as the *** numerical results are provided,and the accuracy of the solutions is analyzed,indicating that the formulas and results obtained with the SAFEM may serve as the reference points for validating the outcomes of experimental and numerical computations.

关键词： semi-analytical approach fiber-reinforced composite(FRC) effective property finite element method(FEM) asymptotic homogenization method(AHM) micropolar elasticity

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The Impact of Augmentation and SMOTE Implementation on the Classification Models Performance: A Case Study on Student Academic Performance Dataset 9th

The Impact of Augmentation and SMOTE Implementation on the C...

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9th International Conference on computer science and Computational Intelligence, ICCSCI 2024

作者： Sano, Albert Verasius Dian Bhatti, Faqir M. Miranda, Eka Aryuni, Mediana Zakiyyah, Alfi Yusrotis Bernando, Charles Computer Science Department School of Computer Science Bina Nusantara University Jakarta11480 Indonesia Riphah Institute of Computing and Applied Sciences Riphah Intternational University Raiwind Lahore Pakistan Information Systems Department School of Information Systems Bina Nusantara University Jakarta11480 Indonesia Mathematics Department School of computer Science Bina Nusantara University Jakarta11480 Indonesia

This study aims to find out the impact of data augmentation and Synthetic Minority Over-sampling Techniques (SMOTE) implementation on the classification models performance using small and imbalanced dataset of student academic performance. The design of this study involved a comprehensive experiment by comparing four scenarios: 1) comparing classification models without both data augmentation and SMOTE, 2) models with data augmentation, 3) models with SMOTE, and 4) models with both data augmentation and SMOTE. The model's performances were each measured based on standard evaluation metrices such as accuracy, precision, recall, F1-score. To test the results validity, there were three classification algorithms implemented and evaluated for each scenario, that is, Random Forest, XGBoost, and AdaBoost. The finding of this study highlights the significant impact of data augmentation and SMOTE to the increase of classification models performance, particularly over the small and imbalanced dataset. Results showed that the implementation of both techniques simultaneously brought about the most significant increase in the evaluation metrices compared to the implementation of both techniques separately. The originality of this study lies in its comprehensive approach in comparing the effectiveness of data augmentation and SMOTE, as well as the use of student academic performance dataset, which is, a real case in the context of artificial intelligence. This finding gives a valuable insight to the researchers and practitioners in choosing appropriate techniques to handle small and imbalanced class datasets. This study is expected to make an important contribution to the more effective development of classification methodology in various domains. © 2024 The Authors.

关键词： Data accuracy

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New modelling and exact method for aircraft arrival sequencing and scheduling

New modelling and exact method for aircraft arrival sequenci...

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2011 4th International Conference on Logistics, LOGISTIQUA'2011

作者： Farah, Ihsen Kansou, Ali Yassine, Adnan Galinho, Thierry University of Le Havre Laboratory of Applied Mathematics of Le Havre France University of Le Havre Superior Institute for Logistics Studies Laboratory of Applied Mathematics of Le Havre France University of Le Havre Superior Institute for Logistics Studies Computer Science Information Processing and Systems Laboratory France

ISBN: (纸本)9781457703249

In this work, the first target is to model and effectively resolve the Arrival Sequencing and Scheduling problem (ASS). The problem is NP-hard and exists in the Air Traffic Control (ATC) for a long time. It has been the hottest topic in transportation research due to the constantly increasing aviation traffic volume around the world. This paper attempts to design a mathematical integer linear model, with the constraints of limited time windows. We begin by modeling the (ASS) problem by a quadratic integer program and propose a change of variables to linearize the problem, i.e. transforming the quadratic constraints to linear constraints. The second target is to resolve the model by an exact method based on the algorithm of branch and bound. Numerical simulations are applied to real data to show the effectiveness of our new formulation and our approach. They are presented at the end of this article. © 2011 IEEE.

关键词： Air traffic control

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Ant colony optimization for aircraft landings

Ant colony optimization for aircraft landings

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2011 4th International Conference on Logistics, LOGISTIQUA'2011

ISBN: (纸本)9781457703249

We address the problem of determining the arrival sequencing and scheduling for aircrafts in air traffic control system. The overall objective of this problem is the minimization of delay cost. The problem is NP-hard for this reason solving the problem optimally is limited to instances of small sizes. In this paper we treat the static case of ASS problem where all data are known in advance. We begin by proposed a mathematical quadratic integer model, with the constraint of limited time window. After we propose a change of variable in order to make linear the initial quadratic constraints. The second target of this work is to resolve the model by an ant colony algorithm. Numerical simulations are applied to real data to show the effectiveness of our new formulation and our approach. They are presented at the end of this article. © 2011 IEEE.

关键词： Air traffic control

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Integration of a Chatbot to Facilitate Access to Educational Content in Digital Universities 26

Integration of a Chatbot to Facilitate Access to Educational...

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26th International Conference on Advanced Communications Technology, ICACT 2024

作者： Babou, Birahim Sylla, Khalifa Sow, M.Y. Ouya, Samuel Lita Laboratory Polytechnic High School Cheikh Anta Diop University of Senegal Senegal of Senegal Department of Applied Mathematics and Computer Science Senegal Unchk of Senegal Infrastructure and Information Systems Department Senegal

ISBN: (纸本)9791188428120

Digital universities have been developed in several countries, particularly on the African continent, to meet the need for massification in the higher education sector. However, the lack of physical space is a major drawback, preventing learners from succeeding and increasing the drop-out rate compared with a conventional university. In these digital universities, learners use distance learning platforms to complete their training. For a good training, mastery of the fundamental modules is essential. With the frequent use of messaging applications, the integration of Artificial Intelligence (AI) could promote and facilitate access to educational content and enhance their learning experience. In this article, we propose a model for integrating a chatbot that will enable learners to access training modules to increase their knowledge and master core modules through formative skills assessments. The model we propose is based on the use of Machine Learning (ML) with the Rasa open-source framework and the Moodle Learning Management System (LMS) platform. © 2024 Global IT Research Institute - GIRI.

关键词： Machine learning

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computer Vision for Assistive Healthcare

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丛书名： computer Vision and Pattern Recognition

2018年

作者： Marco Leo Giovanni Maria Farinella

ISBN: (数字)9780128134467

ISBN: (纸本)9780128134450

computer Vision for Assistive Healthcare describes how advanced computer vision techniques provide tools to support common human needs, such as mental functioning, personal mobility, sensory functions, daily living activities, image processing, pattern recognition, machine learning and how language processing and computer graphics cooperate with robotics to provide such tools. Users will learn about the emerging computer vision techniques for supporting mental functioning, algorithms for analyzing human behavior, and how smart interfaces and virtual reality tools lead to the development of advanced rehabilitation systems able to perform human action and activity recognition. In addition, the book covers the technology behind intelligent wheelchairs, how computer vision technologies have the potential to assist blind people, and about the computer vision-based solutions recently employed for safety and health monitoring.

关键词： computer vision. Medical care.

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Vector Optimization 1

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丛书名： Lecture Notes in Economics and Mathematical systems

1000年

作者： Guang-ya Chen Xuexiang Huang Xiaoqi Yang

ISBN: (数字)9783540284451

ISBN: (纸本)9783540212898

Vector optimization model has found many important applications in decision making problems such as those in economics theory, management science, and engineering design (since the introduction of the Pareto optimal solu tion in 1896). Typical examples of vector optimization model include maxi mization/minimization of the objective pairs (time, cost), (benefit, cost), and (mean, variance) etc. Many practical equilibrium problems can be formulated as variational in equality problems, rather than optimization problems, unless further assump tions are imposed. The vector variational inequality was introduced by Gi- nessi (1980). Extensive research on its relations with vector optimization, the existence of a solution and duality theory has been pursued. The fundamental idea of the Ekeland's variational principle is to assign an optimization problem a slightly perturbed one having a unique solution which is at the same time an approximate solution of the original problem. This principle has been an important tool for nonlinear analysis and optimization theory. Along with the development of vector optimization and set-valued optimization, the vector variational principle introduced by Nemeth (1980) has been an interesting topic in the last decade. Fan Ky's minimax theorems and minimax inequalities for real-valued func tions have played a key role in optimization theory, game theory and math ematical economics. An extension was proposed to vector payoffs was intro duced by Blackwell (1955).

关键词： Economics, general Optimization mathematics, general Operations Research/Decision Theory Calculus of Variations and Optimal Control Optimization Analysis

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Enhanced heat transfer in nanofluid flow via prabhakar fractional models for solar thermal systems

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Journal of Radiation Research and applied sciences 2025年第3期18卷

作者： Shajar Abbas Ghada Ragheb Elnaggar Ahmad Shafique Ioan-Lucian Popa S. Saleem Muhammad Ramzan Mumtaz Ahmad Centre for Advanced Studies in Pure and Applied Mathematics Bahauddin Zakariya University Multan Pakistan AS (Ayub Shah) Institute of Mathematics and Research Centre Multan Pakistan Industrial and Systems Engineering Department College of Engineering Princess Nourah bint Abdulrahman University P.O. Box 84428 Riyadh 11671 Saudi Arabia Department of Computing Mathematics and Electronics “1 Decembrie 1918” University of Alba Iulia 15 510009 Alba Iulia Romania Faculty of Mathematics and Computer Science Transilvania University of Brasov Iuliu Maniu Street 50 500091 Brasov Romania Department of Mathematics College of Science King Khalid University Abha 61413 Saudi Arabia Center for Artificial Intelligence (CAI) King Khalid University Abha 61421 Saudi Arabia Department of Mathematics University of Sargodha Sargodha Pakistan

This study presents a comprehensive thermal analysis of non-Newtonian nanofluid flow influenced by solar thermal radiation, with direct applications in industrial engineering, renewable energy systems, and thermal management. The objective is to evaluate the performance of a second-grade nanofluid in a parabolic trough solar collector (PTSC), focusing on the impacts of chemical reaction, mass and heat transport. The model assumes a copper–PVA-water nanofluid infused with gyrotactic microorganisms to enhance thermal conductivity and bioconvection. The dimensionless governing equations for velocity, temperature, concentration, and bioconvection are formulated using Fourier's and Fick's laws and calculated analytically via the Laplace integral transform. Results reveal that a 10 % increase in nanoparticle volume fraction leads to a 15 % improvement in temperature distribution, while the electric field parameter increases fluid velocity by 12 %. Aditionally, increase in bioconvection Lewis and Peclet numbers significantly reduce microorganism concentration by approximately 20 %. The study demonstrates that fractional-order models offer better control of transport mechanisms and that second-grade nanofluids improve heat transfer efficiency. These findings highlights the promise of of such fluids in solar thermal systems, industrial engineering processes, and energy-efficient system design.

关键词： Solar radiation Prabhakar derivative Gyrotactic microorganisms Laplace integral transform

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Mobile Cloud Networking: Mobile network, compute, and storage as one service on-demand

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2013 Annual Future Internet Assembly, FIA 2013

作者： Jamakovic, Almerima Bohnert, Thomas Michael Karagiannis, Georgios University of Bern Communication and Distributed Systems Group Institute of Computer Science and Applied Mathematics Neubrückstrasse 10 CH-3012 Bern Switzerland Zurich University of Applied Sciences ZHAW/ICCLab Institute of Information Technology Obere Kirchgasse 2 CH-8400 Winterthur Switzerland University of Twente Design and Analysis of Communication Systems Group Faculty for Electrical Engineering Mathematics and Computer Science P.O. Box 217 7500 AE Enschede Netherlands

ISBN: (纸本)9783642380815

The Future Communication Architecture for Mobile Cloud Services: Mobile Cloud Networking (MCN)1 is a EU FP7 Large-scale Integrating Project (IP) funded by the European Commission. MCN project was launched in November 2012 for the period of 36 month. In total top-tier 19 partners from industry and academia commit to jointly establish the vision of Mobile Cloud Networking, to develop a fully cloud-based mobile communication and application platform. © The Author(s).

关键词： Mobile telecommunication systems

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