IEEE Latin America Transactions最新文献_第8页

Biomedical engineering research in Chilean universities - A bibliometric analysis 智利大学的生物医学工程研究--文献计量分析

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2024-03-14 DOI: 10.1109/TLA.2024.10472960

Javiera Vásquez-Salgado;Rosa L. Figueroa;Julio Sotelo;Manuel Villalobos-Cid

{"title":"Biomedical engineering research in Chilean universities - A bibliometric analysis","authors":"Javiera Vásquez-Salgado;Rosa L. Figueroa;Julio Sotelo;Manuel Villalobos-Cid","doi":"10.1109/TLA.2024.10472960","DOIUrl":"https://doi.org/10.1109/TLA.2024.10472960","url":null,"abstract":"Biomedical engineering (BME) combines engineering, biology, and medicine to develop innovative healthcare solutions. There is an increasing demand for BME professionals following technological and scientific advances. In Chile, only three universities offer undergraduate BME programs: Universidad de Valparaiso, Universidad de Concepcion, and Universidad de Santiago de Chile. Each institution has defined its curriculum, professional profile, and research focus based on its perspective of the country's needs. However, the scope of their research contribution has not been studied. In this work, we perform a comprehensive bibliometric analysis using data from the SCOPUS database to evaluate publications by researchers affiliated with Chilean undergraduate BME programs from 2000 to 2022. The objective is to identify the research areas of BME in Chile, understand the similarities and differences between universities, analyse their research areas, explore collaboration relationships, and characterise the discipline's evolution. The main contributions of this work are (1) a quantitative and qualitative analysis of BME research in Chile, (2) the identification of BME research areas and their development over time, (3) the creation of a dashboard-style web tool, and (4) proposing a robust methodology for bibliometric analysis applicable to BME literature in Chile and similar contexts. This work represents the first collaboration involving authors from all universities with undergraduate Chilean BME programs.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10472960","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140135200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

APNet: Accurate Positioning Deformable Convolution for UAV Image Object Detection APNet：用于无人机图像目标检测的精确定位变形卷积

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2024-03-14 DOI: 10.1109/TLA.2024.10472961

Peiran Zhang;Guoxin Zhang;Kuihe Yang

{"title":"APNet: Accurate Positioning Deformable Convolution for UAV Image Object Detection","authors":"Peiran Zhang;Guoxin Zhang;Kuihe Yang","doi":"10.1109/TLA.2024.10472961","DOIUrl":"https://doi.org/10.1109/TLA.2024.10472961","url":null,"abstract":"Unmanned aerial vehicle (UAV) image object detection, in recent years, has been receiving increasing attention for its wide application in military and civil fields. Current object detection methods perform well in generic scenarios, while vast small objects and extremely dense distribution in UAV images make it difficult to capture them, resulting in sub-optimal performance. In this paper, we propose a UAV image object detection framework APNet, which addresses the issue mentioned above by fine-grain deformable convolution (DC) and effective feature fusion. First, we design an accurate positioning deformable convolution (APDC), which changes the kernel shape dynamically to enforce refined features, especially in regions where objects gather densely. Specifically, a positional information enhancement attention (PEA) is designed to generate more accurate convolutional position offsets depending on the object position. Therefore, APDC alleviates inflexible deformation in vanilla DC and exhibits better adaptability to the shapes of different objects, which discriminates multi-objects in densely distributed areas in a fine-grain way. Second, we propose an effective cross-layer feature fusion (ECF) to integrate multi-scale features effectively and aggregate attentive features dynamically. Extensive experiments conducted on VisDrone and UAVDT demonstrate the universality and effectiveness of our APNet, achieving 29.8 and 48.7 in mAP and mAP50, respectively. Compared to the state-of-the-art (SOTA) method, our APNet achieves an improvement of 2.2 and 3.5 in mAP and mAP50, respectively.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10472961","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140135192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a Smartphone Application and Chrome Extension to Detect Fake News in English and European Portuguese 开发智能手机应用程序和 Chrome 浏览器扩展程序，以检测英语和葡萄牙语假新闻

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2024-03-14 DOI: 10.1109/TLA.2024.10472958

Ricardo Afonso;João Rosas

{"title":"Development of a Smartphone Application and Chrome Extension to Detect Fake News in English and European Portuguese","authors":"Ricardo Afonso;João Rosas","doi":"10.1109/TLA.2024.10472958","DOIUrl":"https://doi.org/10.1109/TLA.2024.10472958","url":null,"abstract":"In a digital society, the truth portrayed by information is crucial in promoting education, security, and evolution. However, fake news raises a significant concern in that regard. Although there has been a continuous effort in the fight against fake news, it is still a multifaceted challenge in constant change as the menace renovates itself. Thus, in our approach, several machine learning and deep learning models were developed to obtain models that can detect fake content that appears online. The models can then be interfaced with users devices, namely in the form of browser extensions and smartphone applications. The classification models run on a cloud server and are accessible via web services. These models can detect fake news in English and European Portuguese, with a stronger focus on the latter, given the reduced number of projects in this specific field and language. Besides developing the first public dataset for fake news detection in European Portuguese through web scraping, the models achieved better performance than previous work while being trained with a significantly higher amount of data from a wider variety of sources.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10472958","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140135277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Detection of violent speech against women in Mexican tweets using an active learning approach 利用主动学习方法检测墨西哥推文中针对妇女的暴力言论

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2024-03-14 DOI: 10.1109/TLA.2024.10473002

Grisel Miranda-Piña;Roberto Alejo;Eréndira Rendón-Lara;Vicente García

{"title":"Detection of violent speech against women in Mexican tweets using an active learning approach","authors":"Grisel Miranda-Piña;Roberto Alejo;Eréndira Rendón-Lara;Vicente García","doi":"10.1109/TLA.2024.10473002","DOIUrl":"https://doi.org/10.1109/TLA.2024.10473002","url":null,"abstract":"In Latin American and Caribbean States the verbal violence against women on social networks, such as Twitter, is a serious threat that has been addressed through the implementation of social norms, public policies, and social movements. Nevertheless, a challenge is the effective and automatic real-time detection of violent tweets. In this sense, traditional machine learning algorithms have been proposed to tackle social issues where the training process is performed in a static manner. However, considering that Twitter is a dynamic environment where a vast of tweets are generated each second, it requires powerful machine learning algorithms that could exploit this pool of unlabeled data to be incorporated into the model through continuous updates. This paper explores an active learning method based on uncertainty sampling, which identifies the most confusing tweets to be labeled by an expert in real-time. This focused selection prioritizes which data can be used to train a multilayer perceptron that can achieve a better performance with fewer training samples. Experimental results show that including new samples yields promising results, increasing the AUC from 0.8712 to 0.8833.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10473002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140135193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A fingerprint location framework for uneven WiFi signals based on machine learning 基于机器学习的不均匀 WiFi 信号指纹定位框架

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2024-03-14 DOI: 10.1109/TLA.2024.10473000

Xu Lu;Kejie Zhong;Zhiwei Guan;Jun Liu

{"title":"A fingerprint location framework for uneven WiFi signals based on machine learning","authors":"Xu Lu;Kejie Zhong;Zhiwei Guan;Jun Liu","doi":"10.1109/TLA.2024.10473000","DOIUrl":"https://doi.org/10.1109/TLA.2024.10473000","url":null,"abstract":"WiFi fingerprint positioning is a common method for indoor location determination. Existing methods are susceptible to fluctuations in WiFi signal strength during the offline phase, leading to unevenly received signals. Additionally, during online positioning, there is a lack of integration with historical trajectory information. These problems can result in errors in both offline fingerprint acquisition and online location positioning. To address these problems, we propose a method that combines normality detection in the offline phase and Location Weighted K-nearest Neighbor positioning in the online phase. In the offline phase, initial Received Signal Strength Indication samples undergo preprocessing based on skewness and kurtosis for normality detection. If the samples conform to a normal distribution model, the probability density is estimated using the normal distribution function. If not, estimation occurs using the kernel density function model. Subsequently, values are averaged after Kalman filtering to establish a high-precision fingerprint database. During the online positioning phase, the LWKNN algorithm is employed. Initially, the Weighted K-nearest Neighbor method estimates the position, and this information is utilized as features to construct a Longterm and Shortterm Memory network model. The optimal path is determined through the least square method. Finally, the obtained outputs are integrated with historical data from the fingerprint positioning trajectory to enhance target positioning accuracy. Experimental results demonstrate that our indoor localization method significantly improves WiFi fingerprint localization accuracy compared to traditional localization methods.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10473000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140135263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Table of Contents April 2024 目录 2024 年 4 月

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2024-03-14 DOI: 10.1109/TLA.2024.10473001

引用次数: 0

Enhancing Axial Ratio Bandwidth of Dual Band Microstrip Patch Antenna for GSM Application 增强用于 GSM 应用的双频微带贴片天线的轴向比带宽

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2024-03-14 DOI: 10.1109/TLA.2024.10472962

Pooja Sahoo;Pramod K. Singhal;Karuna Markam

{"title":"Enhancing Axial Ratio Bandwidth of Dual Band Microstrip Patch Antenna for GSM Application","authors":"Pooja Sahoo;Pramod K. Singhal;Karuna Markam","doi":"10.1109/TLA.2024.10472962","DOIUrl":"https://doi.org/10.1109/TLA.2024.10472962","url":null,"abstract":"The paper objective is to designed circular polarized microstrip patch antenna and enhancing axial ratio bandwidth with improved impedance bandwidth. An antenna is designed using stacking method. The design of the antenna is achieved using two slots on the main radiating patch and one cross slot on the near field resonating parasitic patch (NFRP). The NFRP patch is positioned below the main radiating patch at some height. The structure is called modified Hilbert shaped antenna. A slots methodology on patches is used for the attainment of wider bandwidth. Improvement of the axial ratio bandwidth of an antenna is achieved by the introduction of NFRP patch. The antenna that has been designed is resonated at frequencies 900 MHz and 1890 MHz, covering two bands i.e. (725-990) MHz & (1800-1920) MHz with a return loss of -25 dB. Impedance bandwidths are obtained 265 MHz and 120 MHz at these frequencies. Furthermore, bands are covered by a 3-dB axial ratio of (800950) MHz and (1720-1920) MHz. The percentage axial ratio bandwidths are obtained 17.14% and 10.98% over the operating bands. An average gain and radiation efficiency is reported 6.7 dBi and 84% for the antenna. The size of the antenna is calculated 0.3600.420 0.0420. In summery the antenna is described as a dual-band, circular polarized with a stable gain and wider axial ratio bandwidth, deemed suitable for GSM (Global System for Mobile Communication) applications.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10472962","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140135244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bioethanol production optimization by direct numerical methods and evolutionary algorithms 用直接数值方法和进化算法优化生物乙醇生产

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2024-02-09 DOI: 10.1109/TLA.2024.10431425

Cecilia Fernández;Nadia Pantano;Carla Groff;Rocío Gil;Gustavo Scaglia

{"title":"Bioethanol production optimization by direct numerical methods and evolutionary algorithms","authors":"Cecilia Fernández;Nadia Pantano;Carla Groff;Rocío Gil;Gustavo Scaglia","doi":"10.1109/TLA.2024.10431425","DOIUrl":"https://doi.org/10.1109/TLA.2024.10431425","url":null,"abstract":"This paper develops a dynamic optimization methodology based on direct numerical methods, for the bioethanol fed-batch production from glucose and fructose as a substrate. The mathematical model that governs the process consists of six differential equations and is highly nonlinear. The proposed strategy uses the Fourier trigonometric basis and normalized orthogonal polynomials for substrate feeding rate parameterization. Then, evolutionary algorithms and gradient methods are combined to search parameters that generate the best control action. This parameterization methodology requires a minimum number of parameters to optimize. Also, the continuous and differentiable nature of the optimal profile enables its direct implementation in the physical process, eliminating the necessity for filtering or smoothing it. In addition, they are ideal for bioprocesses, in which it is preferable to avoid abrupt changes in the operating modes of the process to promote cell growth. As a result, using only 3 parameters, a 3.5% increase in ethanol production was achieved, while the reference uses at least 10 parameters and provides a stepped feed profile. The simulations have yielded promising results, making this proposal an alternative with excellent potential for process optimization.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10431425","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139715211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Isolation Transformer-less Single DC Source fed Dual 5-leg Inverter Controlled 5-Phase Induction Motor with Modified Direct Torque Control 采用改进型直接转矩控制的无隔离变压器单直流电源馈电双 5 脚逆变器控制 5 相感应电机

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2024-02-09 DOI: 10.1109/TLA.2024.10431418

Venkata Subba Reddy Chagam;Swati Devabhaktuni

{"title":"An Isolation Transformer-less Single DC Source fed Dual 5-leg Inverter Controlled 5-Phase Induction Motor with Modified Direct Torque Control","authors":"Venkata Subba Reddy Chagam;Swati Devabhaktuni","doi":"10.1109/TLA.2024.10431418","DOIUrl":"https://doi.org/10.1109/TLA.2024.10431418","url":null,"abstract":"A modified hysteresis torque controller is introduced into the direct torque control scheme of a 5-phase open-end winding induction motor, aimed at enhancing steady-state performance by minimizing torque, flux ripple, and current total harmonic distortion (%THD) with the dual 5-leg inverter configuration. The proposed Direct Torque Control (DTC) strategy utilizes a common DC source for both converters without the need for a bulky isolation transformer, accomplished by nullifying common mode voltage in the dual inverter open-end winding configuration. This proposed technique employs 30 virtual voltage vectors (VVVs) generated from the dual inverter configuration, strategically categorized as small, large, and medium voltage vectors. These 30 VVVs are instrumental in forming a 7-level torque controller and a 3-level torque controller in the proposed DTC scheme. In contrast to the existing DTC method, which uses 20 virtual voltage vectors from a dual 5-leg inverter configuration and grapples with challenges like high current harmonic distortion, torque ripple, and flux ripple, the proposed control scheme introduces a new 7-level torque hysteresis controller. The outcome is reduced torque and flux ripple, along with minimized harmonic content across various speeds and loading conditions without disturbing the dynamics. Experimental hardware results are scrutinized, comparing the classical DTC with the proposed DTC schemes in open-end winding induction motors, aiming to know the superior qualities of the proposed control approach.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10431418","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139715136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fractional-Order Control for Voltage Regulation in Bidirectional Converters: An Experimental Study 用于双向转换器电压调节的分数阶控制：实验研究

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2024-02-09 DOI: 10.1109/TLA.2024.10431419

Juan Gerardo Parada-Salado;Luis M. Martinez-Patiño;Francisco J. Pérez-Pinal;Allan G. Soriano-Sánchez;Alejandro I. Barranco-Gutiérrez;Carina Zarate-Orduño

{"title":"Fractional-Order Control for Voltage Regulation in Bidirectional Converters: An Experimental Study","authors":"Juan Gerardo Parada-Salado;Luis M. Martinez-Patiño;Francisco J. Pérez-Pinal;Allan G. Soriano-Sánchez;Alejandro I. Barranco-Gutiérrez;Carina Zarate-Orduño","doi":"10.1109/TLA.2024.10431419","DOIUrl":"https://doi.org/10.1109/TLA.2024.10431419","url":null,"abstract":"The theoretical application of fractional equations in controller development is not a new topic. The first efforts on this topic were reported in the late 1970s. However, in the last four years, a greater number of papers related to fractional control have been published than the one accumulated in previous years. Motivated by the above, this paper reports the step-by-step development of this type of control in a bidirectional converter. Furthermore, the discrete-time equivalent of the developed fractional control is implemented on Texas Instruments F280042C digital signal processor. The experimental results of the discrete fractional compensator are compared with the experimental results of a conventional proportional integral derivative (PID) controller. The results show a notable improvement in the response of the bidirectional converter with the fractional control; specifically, faster responses and less overshoot in most of the experiments carried out. Also, the existing challenges facing the widespread application of this control technique are notorious and are extensively addressed in this article.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10431419","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139715149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0