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16th International Conference on Environment and Electrical Engineering, EEEIC 2016

作者： Santiago, Isabel Trillo-Montero, David Palacios-Garcia, Emilio J. Moreno-Garcia, Isabel M. Moreno-Munoz, Antonio Department of Computer Architecture Electronic and Electronic Technology University of Córdoba Campus de Rabanales CórdobaE-14071 Spain

ISBN: (纸本)9781509023196

The smoothing effects obtained by aggregating the production of several photovoltaic (PV) plants were analyzed in this paper, taking into account not only the grouped peak power or the distance between different PV plants, but also considering the different azimuth and tilt angles of the PV modules. The reduction in fluctuations, one of the main disadvantages of this energy source, will only have its effects on the distribution grid if the production of all grouped PV installations is injected in the same line of the network. Therefore, if it is not possible to include in the ensemble far away installations, with uncorrelated productions, a solution may be to use different installation angles in the grouped plants, in order to improve the reduction of fluctuations in the aggregated production injected to the grid. © 2016 IEEE.

关键词： Photovoltaic effects

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Improving seismic performance of welded joints in CFST Truss towers: Effects of concrete fill and ring stiffener configurations

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Structures 2025年 77卷

作者： Cao, Yan Zandi, Y. Mohammed, Khidhair Jasim Sadighi Agdas, A. Ali, H. Elhosiny Khadimallah, Mohamed Amine Sadaghdes, Z. Asllzadhe, Hamid School of Computer Science and Engineering Xi'an Technological University Xi'an710021 China School of Mechatronic Engineering Xi'an Technological University Xi'an710021 China Department of Civil Engineering Tabriz Branch Islamic Azad University Tabriz Iran Air Conditioning and Refrigeration Techniques Engineering Department College of Engineering and Technologies Al-Mustaqbal University Babylon Hilla51001 Iraq Ghateh Gostar Novin Company Tabriz51579 Iran Department of Physics Faculty of Science King Khalid University P.O. Box 9004 Abha61413 Saudi Arabia Department of Civil Engineering College of Engineering in Al-Kharj Prince Sattam Bin Abdulaziz University Al-Kharj11942 Saudi Arabia College of Civil Engineering and Architecture Zhejiang University Hangzhou310058 China Institute of Research and Development Duy Tan University Da Nang Viet Nam School of Engineering & Technology Duy Tan University Da Nang Viet Nam Department of Biomaterials Saveetha Dental College and Hospital Saveetha Institute of Medical and Technical Sciences Chennai600077 India

This study presents a novel approach to enhance the longevity and seismic resilience of ‎ Concrete-Filled Steel Tubular (CFST) frame towers commonly used in ‎onshore wind turbines. Fatigue-related failures at welded joints pose significant challenges to the durability of these towers. This research investigates the impact of optimized ring stiffener ‎configurations and concrete infill on reducing stress concentrations and improving ‎fatigue resistance under simulated seismic loading. The study utilizes with samples including CFST-gusset plate joints and non-concrete-filled joints, with different configurations of concrete infill and ring stiffeners. ‎These samples were evaluated under static loading to assess the influence of stiffener width, thickness, and spacing on Stress Concentration Factors (SCFs). Subsequently, cyclic loading tests were conducted to observe crack initiation and progression. The results show that ‎optimized configurations of both concrete fill and ring stiffeners significantly reduce ‎SCFs, improve stress distribution, and delay crack initiation, enhancing the seismic ‎fatigue performance of CFST joints. Moreover, the study integrates Artificial Intelligence ‎‎(AI) techniques, specifically Support Vector Machines (SVM), to predict the fatigue ‎behavior of these joints under different loading conditions. The SVM model was trained on experimental data and demonstrated high predictive accuracy in forecasting the fatigue life of CFST joints, achieving an R² value of 0.95, an RMSE of 0.11, and an MAE of 0.08. These results validate the AI model's ‎ability to optimize design parameters and predict fatigue life, contributing to more ‎efficient and reliable CFST joint design. This integration of AI enhances design ‎optimization by providing precise predictions based on complex variables like stiffener ‎geometry and concrete filling. Overall, the findings suggest that incorporating ‎optimized stiffener configurations, concrete infill, and AI-based desi

关键词： Stress concentration

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Symbolic representation of the EEG for sleep stage classification

Symbolic representation of the EEG for sleep stage classific...

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2011 11th International Conference on Intelligent Systems Design and Applications, ISDA'11

作者： Herrera, L.J. Mora, A.M. Fernandes, C. Migotina, D. Guillén, A. Rosa, A.C. Department of Computer Architecture and Technology University of Granada Granada Spain I.S.R. Technical University of Lisbon Lisbon Portugal

ISBN: (纸本)9781457716751

Manual visualization-based sleep stage classification is a time-consuming task prone to errors. Since the correct identification of sleep stages is vital for the correct identification of sleep disorders and for the research in this field in general, there is a growing demand for efficient automatic classification methods. However, there is still no symbolic representation of the biomedical signals that leads to a reliable and accurate automatic sleep classification system. This work presents the application of a novel method for symbolic representation of the EEG and evaluates its potential as information source for a sleep stage classifier, in this case a SVM classifier. The data is first analyzed using Self-Organizing Maps (SOM) and a mutual information (MI)-based variable selection algorithm. Preliminary results of sleep data classification provide success rates around 70%. These results are promising since only EEG is used, and there is still room for improvement in this new symbolic representation of the signal. © 2011 IEEE.

关键词： Support vector machines

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Image threshold selection with isoperimetric partition

Image threshold selection with isoperimetric partition

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International Conference on computer Science and Education

作者： Zhang, Daming Fu, Maosheng Sun, Dengdi Luo, Bin School of Computer Science and Technology Anhui University Heifei China Department of Mathematics and Physics Anhui Institute of Architecture and Industry Heifei China

ISBN: (纸本)9781424460052

Graph theory has attracted great attention for the problem of image segmentation in recent years. In this paper we deduce the unified form of the normalized cut (Ncut) algorithm and the Isoperimetric algorithm, and then a new Isoperimetric-based thresholding algorithm is proposed. Unlike Tao and Jin's Ncut-based thresholding algorithm, the proposed algorithm need not to search all possible thresholds, nevertheless yields similar results. A large number of examples are presented to show the effectiveness of the proposed algorithm. ©2010 IEEE.

关键词： Image segmentation

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Energy impact in the design space exploration of loop buffer schemes in embedded systems

Energy impact in the design space exploration of loop buffer...

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2013 IFIP/IEEE 21st International Conference on Very Large Scale Integration, VLSI-SoC 2013

作者： Artes, Antonio Ayala, Jose L. Fasthuber, Robert Raghavan, Praveen Catthoor, Francky Computer Architecture and Automation Department Complutense University of Madrid Madrid Spain Smart Systems and Energy Technology Unit IMEC Leuven Belgium

ISBN: (纸本)9781479905249

The reduction of the energy consumption in the domain of the embedded systems is becoming the most important design goal due to the increasing use of battery powered consumer devices. Previous research has pointed out the instruction memory organisation as one of the major sources of energy consumption of the embedded systems. Due to this fact, the introduction of any enhancement in this component of the system becomes crucial in order to decrease this energy bottleneck. The purpose of this paper is to present a highlevel energy analysis of the loop buffer schemes that exist in the embedded systems. The crucial energy analysis that is presented in this paper not only proposes a method to evaluate different loop buffer schemes for a certain application, but also guides embedded systems designers to make the correct decision in the trade-offs that exist between the energy budget, the required performance, and the area cost of the embedded system. Experimental results used in this analysis show that, the search of energy savings (up to 76%) has to take into account the performance penalty, the area cost, and the impact of the implementation technology in order to choose the most suitable enhancement that has to be introduced in the instruction memory organisation from the point of view of the energy consumption. © 2013 IEEE.

关键词： Embedded systems

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Introducing a remotely accessible optical laboratory for undergraduate students

Introducing a remotely accessible optical laboratory for und...

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119th ASEE Annual Conference and Exposition

作者： Farahmand, Farid Moslehpour, Saeid Kuppuru, Harika Matsa, Swathi Sonoma State University United States Electrical and Computer Engineering Department College of Engineering Technology and Architecture University of Hartford United States

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Online self-organizing adaptive fuzzy controller: Application to a nonlinear servo system

Online self-organizing adaptive fuzzy controller: Applicatio...

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2010 6th IEEE World Congress on Computational Intelligence, WCCI 2010

作者： Cara, Ana Belén Lendek, Zsófi Babuška, Robert Pomares, Héctor Roja, Ignacio Department of Computer Architecture and Computer Technology University of Granada Periodista Saucedo Aranda s/n 18071 Granada Spain Delft Center for Systems and Control Delft University of Technology 2628 CD Delft Netherlands

ISBN: (纸本)9781424469208

This paper presents a self-organizing adaptive fuzzy controller that works online. No prior knowledge about the differential equations governing the plant nor offline training is needed. Starting from very simple topologies, the algorithm uses the data obtained online during the normal operation of the system to modify the structure of the fuzzy controller. This is achieved in two phases: first, the consequents of the current fuzzy rules are adapted;in the second phase, new membership functions are added online. To show its capabilities, a real experiment with a nonlinear servo system has been carried out with satisfactory results. © 2010 IEEE.

关键词： Adaptive control systems

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Tropes in films: An initial analysis

arXiv

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arXiv 2020年

作者： García-Ortega, Rubén Héctor García-Sánchez, Pablo Merelo-Guervós, Juan Julián Department of Computer Architecture and Technology University of Granada Department of Languages and Computer Systems University of Granada Department of Computer Architecture and Technology University of Granada

TVTropes is a wiki that describes tropes and which ones are used in which artistic work. We are mostly interested in films, so after releasing the TropeScraper Python module that extracts data from this site, in this report we use scraped information to describe statistically how tropes and films are related to each other and how these relations evolve in time. In order to do so, we generated a dataset through the tool TropeScraper in April 2020. We have compared it to the latest snapshot of DB Tropes, a dataset covering the same site and published in July 2016, providing descriptive analysis, studying the fundamental differences and addressing the evolution of the wiki in terms of the number of tropes, the number of films and connections. The results show that the number of tropes and films doubled their value and quadrupled their relations, and films are, at large, better described in terms of tropes. However, while the types of films with the most tropes has not changed significantly in years, the list of most popular tropes has. This outcome can help on shedding some light on how popular tropes evolve, which ones become more popular or fade away, and in general how a set of tropes represents a film and might be a key to its success. The dataset generated, the information extracted, and the summaries provided are useful resources for any research involving films and tropes. They can provide proper context and explanations about the behaviour of models built on top of the dataset, including the generation of new content or its use in machine learning. © 2020, CC BY-SA.

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An enhanced scheme for mutual authentication for healthcare services

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Digital Communications and Networks 2022年第2期8卷 150-161页

作者： Salman Shamshad Muhammad Faizan Ayub Khalid Mahmood Saru Kumari Shehzad Ashraf Chaudhry Chien-Ming Chen Department of Computer Science COMSATS University IslamabadSahiwal Campus57000Pakistan Department of Mathematics Ch.Charan Singh UniversityMeerutUttar Pradesh250004India Department of Computer Engineering Faculty of Engineering and ArchitectureIstanbul Gelisim UniversityIstanbulTurkey College of Computer Science and Engineering Shandong University of Science and TechnologyQingdao266590China Riphah School of Computing&Innovation(RSCI) Riphah International UniversityLahore CampusLahore 55150Pakistan Department of Mathematics University of Padua35131 PaduaItaly

With the advent of state-of-art technologies,the Telecare Medicine Information System(TMIS)now offers fast and convenient healthcare services to patients at their ***,this architecture engenders new risks and challenges to patients'and the server's confidentiality,integrity and *** order to avoid any resource abuse and malicious attack,employing an authentication scheme is widely considered as the most effective approach for the TMIS to verify the legitimacy of patients and the ***,several authentication protocols have been proposed to this *** recently,Chaudhry et *** that there are vulnerabilities of impersonation attacks in Islam et al.'s ***,they introduced an improved protocol to mitigate those security ***,Qiu et *** that these schemes are vulnerable to the man-in-the-middle,impersonation and offline password guessing ***,they introduced an improved scheme based on the fuzzy verifier techniques,which overcome all the security flaws of Chaudhry et al.'s ***,there are still some security flaws in Qiu et al.'s *** this article,we prove that Qiu et al.'s protocol has an incorrect notion of perfect user anonymity and is vulnerable to user impersonation ***,we introduce an improved protocol for authentication,which reduces all the security flaws of Qiu et al.'s *** also make a comparison of our protocol with related protocols,which shows that our introduced protocol is more secure and efficient than previous protocols.

关键词： Authentication protocol Security protocol Anonymous protocol Impersonation attack TMIS

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Safety Analysis of Riding at Intersection Entrance Using Video Recognition technology

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computers, Materials & Continua 2022年第9期72卷 5135-5148页

作者： Xingjian Xue Linjuan Ge Longxin Zeng Weiran Li Rui Song Neal N.Xiong College of Landscape Architecture Central South University of Forestry and TechnologyChangshaHunan410004China College of Logistics and Transportation Central South University of Forestry and TechnologyChangshaHunan410004China Department of Mathematics and Computer Science Northeastern State UniversityTahlequahOK74464United States

To study riding safety at intersection entrance,video recognition technology is used to build vehicle-bicycle conflict models based on the Bayesian *** is analyzed the relationship among the width of nonmotorized lanes at the entrance lane of the intersection,the vehicle-bicycle soft isolation form of the entrance lane of intersection,the traffic volume of right-turning motor vehicles and straight-going non-motor vehicles,the speed of right-turning motor vehicles,and straight-going non-motor vehicles,and the conflict between right-turning motor vehicles and straight-going nonmotor *** to the traditional statistical methods,to overcome the discreteness of vehicle-bicycle conflict data and the differences of influencing factors,the Bayesian random effect Poisson-log-normal model and random effect negative binomial regression model are *** results show that the random effect Poisson-log-normal model is better than the negative binomial distribution of random effects;The width of non-motorized lanes,the form of vehicle-bicycle soft isolation,the traffic volume of right-turning motor vehicles,and the coefficients of straight traffic volume obey a normal *** them,the type of vehicle-bicycle soft isolation facilities and the vehicle-bicycle traffic volumes are significantly positively correlated with the number of vehicle-bicycle *** width of non-motorized lanes is significantly negatively correlated with the number of vehicle-bicycle *** periods and flat periods,the average speed of right-turning motor vehicles,and the average speed of straight-going non-motor vehicles have no significant influence on the number of vehicle-bicycle conflicts.

关键词： Video recognition technology vehicle-bicycle conflict intersection entrance random effect poisson-log-normal model random effect negative binomial regression model

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