Elektronika Ir Elektrotechnika最新文献

英文中文

Power and Energy Consumption Models for Embedded Applications 嵌入式应用的功率和能耗模型

IF 1.3 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Elektronika Ir Elektrotechnika

Pub Date : 2022-10-26 DOI: 10.5755/j02.eie.31345

Momcilo Krunic

This paper describes a study on the power and energy consumption estimation models that have been defined to facilitate the development of ultra-low power embedded applications. During the study, various measurements have been carried out on the instruction and application level to challenge the models against empirical data. The study has been performed on the multicore heterogeneous hardware platform developed for ultra-low power Digital Signal Processors (DSP) applications. The final goal was to develop a tool that can provide insight into power dissipation during the execution of embedded applications, so that one can refactor the source code in an energy-efficient manner, or ideally to develop an energy-aware C compiler. The side effect of the research presents interesting insight into how the custom hardware architecture influences power dissipation. The selected platform has been chosen simply because it represents R&D state of the art ultra-low power hardware used in hearing aids. The presented solution has been developed and tested in an Eclipse environment using Java programming language.

本文描述了对功耗和能耗估计模型的研究，这些模型已被定义为促进超低功耗嵌入式应用程序的开发。在研究过程中，在教学和应用层面进行了各种测量，以根据经验数据挑战模型。该研究是在为超低功耗数字信号处理器（DSP）应用开发的多核异构硬件平台上进行的。最终目标是开发一种工具，可以深入了解嵌入式应用程序执行过程中的功耗，这样就可以以节能的方式重构源代码，或者理想情况下开发一个节能的C编译器。该研究的副作用为定制硬件架构如何影响功耗提供了有趣的见解。之所以选择所选平台，只是因为它代表了助听器中使用的最先进的超低功耗硬件的研发状态。所提出的解决方案已经使用Java编程语言在Eclipse环境中进行了开发和测试。

引用次数: 0

Real-Time Investigation of Temperature Effect on Induction Motor Equivalent Circuit Parameter Change 温度对感应电机等效电路参数变化影响的实时研究

IF 1.3 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Elektronika Ir Elektrotechnika

Pub Date : 2022-10-26 DOI: 10.5755/j02.eie.31198

H. Terzioglu, Abdullah Cem Ağaçayak

Today’s developing technology and increasing demands in production areas continue the importance of studies on induction motors (IMs). To meet the demands, the mathematical modeling of IMs must be performed fully and accurately. Variable conditions cause changes in many electrical, magnetic, and thermal parameters. A change in parameters affects the intensity, efficiency of the operating currents of the machine, thereby changing the motor losses.In this article, the objective is to determine the changes in the equivalent circuit parameters of three-phase squirrel-cage induction motors (SCIMs) with different powers under the variable conditions (stator winding temperature, load, and motor shaft speed). Supervisory control and data acquisition (SCADA) program read real-time information (temperature, current, voltage, power, shaft speed, and torque) from the experiments and necessary calculations were made. When the test results were examined, a maximum of 9 % change was observed in the motor ECPs (RS, R2, RM, XS, X2, and XM) at different shaft speeds as a result of the change in the stator winding temperature between 100 % and 110 %. At different loads, this rate of change increases to 16 %. This has shown that motor shaft speed and load, together with temperature, have a significant effect on the ECPs.

当今技术的发展和生产领域日益增长的需求使得异步电动机的研究变得越来越重要。为了满足需求，必须对即时通信系统进行全面、准确的数学建模。可变的条件引起许多电、磁和热参数的变化。参数的变化会影响机器工作电流的强度和效率，从而改变电机损耗。在本文中，目的是确定不同功率的三相鼠笼式异步电动机(SCIMs)在不同条件下(定子绕组温度、负载和电机轴转速)等效电路参数的变化。监控和数据采集(SCADA)程序从实验中读取实时信息(温度、电流、电压、功率、轴转速和转矩)并进行必要的计算。当对测试结果进行检查时，由于定子绕组温度在100%到110%之间的变化，在不同轴速下，电机ECPs (RS, R2, RM, XS, X2和XM)的变化最大可达9%。在不同的负载下，这个变化率增加到16%。这表明，电机轴的转速和负载，连同温度，对ECPs有显著的影响。

{"title":"Real-Time Investigation of Temperature Effect on Induction Motor Equivalent Circuit Parameter Change","authors":"H. Terzioglu, Abdullah Cem Ağaçayak","doi":"10.5755/j02.eie.31198","DOIUrl":"https://doi.org/10.5755/j02.eie.31198","url":null,"abstract":"Today’s developing technology and increasing demands in production areas continue the importance of studies on induction motors (IMs). To meet the demands, the mathematical modeling of IMs must be performed fully and accurately. Variable conditions cause changes in many electrical, magnetic, and thermal parameters. A change in parameters affects the intensity, efficiency of the operating currents of the machine, thereby changing the motor losses.\u0000In this article, the objective is to determine the changes in the equivalent circuit parameters of three-phase squirrel-cage induction motors (SCIMs) with different powers under the variable conditions (stator winding temperature, load, and motor shaft speed). Supervisory control and data acquisition (SCADA) program read real-time information (temperature, current, voltage, power, shaft speed, and torque) from the experiments and necessary calculations were made. When the test results were examined, a maximum of 9 % change was observed in the motor ECPs (RS, R2, RM, XS, X2, and XM) at different shaft speeds as a result of the change in the stator winding temperature between 100 % and 110 %. At different loads, this rate of change increases to 16 %. This has shown that motor shaft speed and load, together with temperature, have a significant effect on the ECPs.","PeriodicalId":51031,"journal":{"name":"Elektronika Ir Elektrotechnika","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46315755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvement of Automotive Sensors by Migrating AUTOSAR End-to-End Communication Protection Library into Hardware 将AUTOSAR端到端通信保护库移植到硬件中改进汽车传感器

IF 1.3 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Elektronika Ir Elektrotechnika

Pub Date : 2022-10-26 DOI: 10.5755/j02.eie.31154

H. V. Caprita, D. Selișteanu

This paper explores new methods to increase the level of safety of data transfer between sensors and electronic control units (ECUs) in automotive communication. A new model of basic sensors to be used in automotive electronics is proposed. This model contains hardware modules that implement the end-to-end communication protection (E2E) mechanism, as defined by the Automotive Open System Architecture (AUTOSAR) standard. By adding this feature inside the sensors, it is possible that, in addition to increasing the safety level, these sensors can be directly connected to the network ECUs via standard communication buses (e.g., Local Interconnect Network (LIN), Controller Area Network (CAN), Flexray, etc.). This paper describes the model, design, and mapping (in a Field Programmable Gate Array device (FPGA)) of the hardware E2E module capable of generating the Cyclic Redundancy Code (CRC) and counter signal for a customized message. This message represents the output of the new sensor E2E module used in a safety communication as requested by the automotive E2E standard. The model is validated also by comparing the data output of the E2E hardware with the data output of the AUTOSAR software E2E library. Finally, future needs and directions are suggested in this area.

本文探讨了提高汽车通信中传感器和电子控制单元（ECU）之间数据传输安全性的新方法。提出了一种新的汽车电子基本传感器模型。该模型包含实现端到端通信保护（E2E）机制的硬件模块，如汽车开放系统架构（AUTOSAR）标准所定义。通过在传感器内部添加这一功能，除了提高安全级别外，这些传感器还可以通过标准通信总线（例如，局域互联网络（LIN）、控制器局域网（can）、Flexray等）直接连接到网络ECU，以及能够生成用于定制消息的循环冗余码（CRC）和计数器信号的硬件E2E模块的映射（在现场可编程门阵列设备（FPGA）中）。此消息表示汽车E2E标准要求的安全通信中使用的新传感器E2E模块的输出。还通过将E2E硬件的数据输出与AUTOSAR软件E2E库的数据输出进行比较来验证该模型。最后，提出了该领域未来的需求和方向。

{"title":"Improvement of Automotive Sensors by Migrating AUTOSAR End-to-End Communication Protection Library into Hardware","authors":"H. V. Caprita, D. Selișteanu","doi":"10.5755/j02.eie.31154","DOIUrl":"https://doi.org/10.5755/j02.eie.31154","url":null,"abstract":"This paper explores new methods to increase the level of safety of data transfer between sensors and electronic control units (ECUs) in automotive communication. A new model of basic sensors to be used in automotive electronics is proposed. This model contains hardware modules that implement the end-to-end communication protection (E2E) mechanism, as defined by the Automotive Open System Architecture (AUTOSAR) standard. By adding this feature inside the sensors, it is possible that, in addition to increasing the safety level, these sensors can be directly connected to the network ECUs via standard communication buses (e.g., Local Interconnect Network (LIN), Controller Area Network (CAN), Flexray, etc.). This paper describes the model, design, and mapping (in a Field Programmable Gate Array device (FPGA)) of the hardware E2E module capable of generating the Cyclic Redundancy Code (CRC) and counter signal for a customized message. This message represents the output of the new sensor E2E module used in a safety communication as requested by the automotive E2E standard. The model is validated also by comparing the data output of the E2E hardware with the data output of the AUTOSAR software E2E library. Finally, future needs and directions are suggested in this area.","PeriodicalId":51031,"journal":{"name":"Elektronika Ir Elektrotechnika","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42807573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Oral Microbiome and Dental Caries Development. 口腔微生物群与龋齿发展

IF 0.5 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Elektronika Ir Elektrotechnika

Pub Date : 2022-09-30 DOI: 10.3390/dj10100184

Josie Shizhen Zhang, Chun-Hung Chu, Ollie Yiru Yu

Dental caries remains the most prevalent oral disease worldwide. The development of dental caries is highly associated with the microbiota in the oral cavity. Microbiological research of dental caries has been conducted for over a century, with conventional culture-based methods and targeted molecular methods being used in order to identify the microorganisms related to dental caries. These methods' major limitation is that they can identify only part of the culturable microorganisms in the oral cavity. Introducing sequencing-based technology and bioinformatics analysis has boosted oral microbiome research and greatly expanded the understanding of complex oral microbiology. With the continuing revolution of molecular technologies and the accumulated sequence data of the oral microbiome, researchers have realized that microbial composition alone may be insufficient to uncover the relationship between caries and the microbiome. Most updated evidence has coupled metagenomics with transcriptomics and metabolomics techniques in order to comprehensively understand the microbial contribution to dental caries. Therefore, the objective of this article is to give an overview of the research of the oral microbiome and the development of dental caries. This article reviews the classical concepts of the microbiological aspect of dental caries and updates the knowledge of caries microbiology with the results of current studies on the oral microbiome. This paper also provides an update on the caries etiological theory, the microorganisms related to caries development, and the shifts in the microbiome in dental caries development.

龋齿仍然是全球最普遍的口腔疾病。龋齿的发生与口腔中的微生物群高度相关。关于龋齿的微生物学研究已经进行了一个多世纪，人们使用传统的培养方法和有针对性的分子方法来鉴定与龋齿有关的微生物。这些方法的主要局限是只能鉴定口腔中的部分可培养微生物。基于测序技术和生物信息学分析的引入推动了口腔微生物组的研究，极大地扩展了对复杂口腔微生物学的认识。随着分子技术的不断革新和口腔微生物组序列数据的不断积累，研究人员意识到仅凭微生物组成可能不足以揭示龋病与微生物组之间的关系。大多数最新证据都将元基因组学与转录组学和代谢组学技术相结合，以全面了解微生物对龋齿的贡献。因此，本文旨在概述口腔微生物组和龋齿发展的研究。本文回顾了龋病微生物学方面的经典概念，并结合当前口腔微生物组的研究成果更新了龋病微生物学方面的知识。本文还对龋病病因学理论、与龋病发展相关的微生物以及微生物组在龋病发展中的变化进行了更新。

{"title":"Oral Microbiome and Dental Caries Development.","authors":"Josie Shizhen Zhang, Chun-Hung Chu, Ollie Yiru Yu","doi":"10.3390/dj10100184","DOIUrl":"10.3390/dj10100184","url":null,"abstract":"<p><p>Dental caries remains the most prevalent oral disease worldwide. The development of dental caries is highly associated with the microbiota in the oral cavity. Microbiological research of dental caries has been conducted for over a century, with conventional culture-based methods and targeted molecular methods being used in order to identify the microorganisms related to dental caries. These methods' major limitation is that they can identify only part of the culturable microorganisms in the oral cavity. Introducing sequencing-based technology and bioinformatics analysis has boosted oral microbiome research and greatly expanded the understanding of complex oral microbiology. With the continuing revolution of molecular technologies and the accumulated sequence data of the oral microbiome, researchers have realized that microbial composition alone may be insufficient to uncover the relationship between caries and the microbiome. Most updated evidence has coupled metagenomics with transcriptomics and metabolomics techniques in order to comprehensively understand the microbial contribution to dental caries. Therefore, the objective of this article is to give an overview of the research of the oral microbiome and the development of dental caries. This article reviews the classical concepts of the microbiological aspect of dental caries and updates the knowledge of caries microbiology with the results of current studies on the oral microbiome. This paper also provides an update on the caries etiological theory, the microorganisms related to caries development, and the shifts in the microbiome in dental caries development.</p>","PeriodicalId":51031,"journal":{"name":"Elektronika Ir Elektrotechnika","volume":"26 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9601200/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78297368","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

Reinforcement Optimization Algorithm for Mobile Robot Sensor Networks Drive Motion Improvement 移动机器人传感器网络驱动运动改进的强化优化算法

IF 1.3 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Elektronika Ir Elektrotechnika

Pub Date : 2022-08-24 DOI: 10.5755/j02.eie.30736

Suryaprakash Shanmugasundaram, Thirumoorthi Ponnusamy, Tamilarasu Viswanathan

This paper proposed four optimization algorithms for mobile robot sensor networks that improve the kinematics drive motion in a reference map environment. The standard procedure followed in mobile robot sensor measurements considers a problem statement for relating the sensor measurements with a reference map. The initial path shows that the existing methods lack consideration of more sensor points without considering the boundary constraints and obstacles. The probabilistic path map can be rearranged according to the current location to improve the better drive motion, as well as to obey the fundamental kinematics equations. he obstacle crossing led to the development of new algorithms. Implementation of schemes is achieved in different map environments, and the accuracy of results outperforms conventional methods by 84.21 % to 96.94 %.

提出了移动机器人传感器网络的四种优化算法，以改善参考地图环境下移动机器人的运动学驱动运动。在移动机器人传感器测量中遵循的标准程序考虑了将传感器测量与参考地图联系起来的问题陈述。初始路径表明，现有方法没有考虑边界约束和障碍物，缺乏对更多传感器点的考虑。概率路径图可以根据当前位置重新排列，以改善更好的驱动运动，并服从基本运动学方程。跨越障碍导致了新算法的发展。在不同的地图环境下实现了方案的实现，结果的精度优于常规方法的84.21% ~ 96.94%。

引用次数: 0

Mathematical Analysis and Design of a Novel 5-DOF 3D Printer Robotic System 一种新型五自由度三维打印机机器人系统的数学分析与设计

IF 1.3 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Elektronika Ir Elektrotechnika

Pub Date : 2022-08-24 DOI: 10.5755/j02.eie.31383

A. Dumlu, M. Mahboubkhah, K. K. Ayten, Gurkan Kalinay

In this study, the mathematical analysis and design of a new 3D printer with 5 degrees of freedom were carried out. Thanks to the developed system, a new concept has been brought to the multi-axis 3D printer mechanisms, and thus, it is aimed to improve the part quality in additive manufacturing (AM) processes. As a result of adding the 4th and 5th axes to the moving platform of the system, the production time of the part was accelerated. It is also possible to print more complex and curved shapes with less support. To design a system with these features, first of all, the kinematic analysis of the system was obtained using vector algebra, and the workspace of the current printer was determined by considering the system constraints in this article. By giving detailed information about the mechanical and electrical components of the designed system, the working principle of the whole system is presented. According to the findings obtained in the studies, the kinematic analyses performed for the proposed system proved to be correct and a new system was proposed especially for additive manufacturing technologies.

本文对一种新型五自由度3D打印机进行了数学分析和设计。该系统为多轴3D打印机构带来了新的概念，旨在提高增材制造(AM)过程中的零件质量。由于在系统的移动平台上增加了第4轴和第5轴，从而加快了零件的生产时间。它也可以用更少的支撑来打印更复杂和弯曲的形状。为了设计具有这些特征的系统，本文首先利用向量代数对系统进行运动学分析，并考虑系统约束条件确定当前打印机的工作空间。通过对所设计系统的机电元件的详细介绍，介绍了整个系统的工作原理。根据研究结果，对所提出的系统进行的运动学分析证明是正确的，并提出了一种专门用于增材制造技术的新系统。

引用次数: 0

Adaptive State Feedback Control Method Based on Recursive Least Squares 基于递推最小二乘的自适应状态反馈控制方法

IF 1.3 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Elektronika Ir Elektrotechnika

Pub Date : 2022-08-24 DOI: 10.5755/j02.eie.31149

M. Levent, O. Aydogdu

This study revealed an adaptive state feedback control method based on recursive least squares (RLS) that is introduced for a time-varying system to work with high efficiency. Firstly, a system identification block was created that gives the mathematical model of the time-varying system using the input/output data packets of the controller system. Thanks to this block, the system is constantly monitored to update the parameters of the system, which change over time. Linear quadratic regulator (LQR) is renewed according to these updated parameters, and self-adjustment of the system is provided according to the changed system parameters. The Matlab/Simulink state-space model of the variable loaded servo (VLS) system module was obtained for the simulation experiments in this study; then the system was controlled. Moreover, experiments were carried out on the servo control experimental equipment of the virtual simulation laboratories (VSIMLABS). The effectiveness of the proposed new method was observed taking the performance indexes as a reference to obtain the results of the practical application of the proposed method. Regarding the analysis of simulation and experimental results, the proposed approach minimizes the load effect and noise and the system works at high efficiency.

该研究揭示了一种基于递归最小二乘（RLS）的自适应状态反馈控制方法，该方法用于时变系统的高效工作。首先，利用控制器系统的输入/输出数据包建立了系统识别块，给出了时变系统的数学模型。由于该块，系统不断受到监控，以更新随时间变化的系统参数。根据这些更新的参数更新线性二次调节器（LQR），并根据改变的系统参数提供系统的自调整。获得了变负载伺服（VLS）系统模块的Matlab/Simulink状态空间模型，用于仿真实验；然后对系统进行控制。并在虚拟仿真实验室伺服控制实验装置上进行了实验。以性能指标为参考，对新方法的有效性进行了观察，得出了新方法的实际应用结果。通过对仿真和实验结果的分析，该方法最大限度地减少了负载效应和噪声，系统工作效率高。

{"title":"Adaptive State Feedback Control Method Based on Recursive Least Squares","authors":"M. Levent, O. Aydogdu","doi":"10.5755/j02.eie.31149","DOIUrl":"https://doi.org/10.5755/j02.eie.31149","url":null,"abstract":"This study revealed an adaptive state feedback control method based on recursive least squares (RLS) that is introduced for a time-varying system to work with high efficiency. Firstly, a system identification block was created that gives the mathematical model of the time-varying system using the input/output data packets of the controller system. Thanks to this block, the system is constantly monitored to update the parameters of the system, which change over time. Linear quadratic regulator (LQR) is renewed according to these updated parameters, and self-adjustment of the system is provided according to the changed system parameters. The Matlab/Simulink state-space model of the variable loaded servo (VLS) system module was obtained for the simulation experiments in this study; then the system was controlled. Moreover, experiments were carried out on the servo control experimental equipment of the virtual simulation laboratories (VSIMLABS). The effectiveness of the proposed new method was observed taking the performance indexes as a reference to obtain the results of the practical application of the proposed method. Regarding the analysis of simulation and experimental results, the proposed approach minimizes the load effect and noise and the system works at high efficiency.","PeriodicalId":51031,"journal":{"name":"Elektronika Ir Elektrotechnika","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43069436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Extraction of Cardiac Cell Membrane Fractional-Order Capacitance from Current Response to Voltage Step 从电流-电压阶跃响应中提取心脏细胞膜分数级电容

IF 1.3 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Elektronika Ir Elektrotechnika

Pub Date : 2022-08-24 DOI: 10.5755/j02.eie.31151

D. Kubánek, J. Koton, O. Svecova

The aim of the article is to examine the possibilities of modeling electrical properties of cardiac cell membrane using the Cole impedance model containing a fractional-order capacitor. A method is presented to determine the parameters of the model based on the current transient response to a voltage step applied to the membrane. The method is based on the numerical minimization of the least squares error between the recorded and calculated transient response of the model using the MATLAB function fminsearch. The use of a fractional-order capacitor in the membrane model is found to result in a reduction in the modeling error compared to that of the classic capacitor.

本文的目的是研究使用含有分数级电容器的科尔阻抗模型模拟心脏细胞膜电学特性的可能性。提出了一种基于电压阶跃作用下的电流瞬态响应来确定模型参数的方法。该方法基于MATLAB函数fminsearch对模型记录的瞬态响应与计算的瞬态响应之间的最小二乘误差进行数值最小化。在膜模型中使用分数阶电容器与传统电容器相比，可以减少建模误差。

引用次数: 0

Analysis of Public Agenda during Covid-19 Pandemics Based on Turkish and English Tweets Using Nonnegative Matrix Factorization and Hypothesis Testing 基于土耳其和英语推文的新冠肺炎大流行期间公共议程的非负矩阵因子分析和假设检验

IF 1.3 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Elektronika Ir Elektrotechnika

Pub Date : 2022-08-24 DOI: 10.5755/j02.eie.31196

Mustafa Yavaş, A. Guran, Y. Ekinci

In this study, Turkish and English tweets through Twitter Application Program Interface (API) between 1-31 January 2021 are analyzed with respect to Covid-19. The collected tweets are preprocessed, labeled with the Vader Sentiment library, and then analyzed by topic modeling with Nonnegative Matrix Factorization. The analysis show that the most frequently mentioned word is “vaccine/aşı” after “Covid”. The topics modelled in the study are grouped into themes and the themes are seen to be similar in both languages, which means that the Turkish and world agenda are not very different in terms of themes in pandemics. Moreover, hypothesis tests are conducted to understand whether language and time period are related to sentiment class. The results show that the Turkish people are more neutral about the Covid-19 issue than other people in the world during the given period of time. Moreover, independent of the language, there are more negative and neutral tweets in the first half of January 2021, whereas there are more positive tweets in the second half of the month. To the best of our knowledge, this is the first study to analyze Covid-19 related tweets in two languages to compare the local and global agendas using topic modeling, sentiment analysis, and hypothesis testing methods.

在这项研究中，分析了2021年1月1日至31日期间通过推特应用程序接口（API）发布的土耳其文和英文推文中关于新冠肺炎的推文。对收集到的推文进行预处理，使用维德情感库进行标记，然后通过非负矩阵因子分解的主题建模进行分析。分析表明，最常被提及的词是“新冠肺炎”之后的“疫苗/ashı”。研究中模拟的主题被分组为主题，两种语言的主题相似，这意味着土耳其和世界议程在流行病主题方面没有太大区别。此外，还进行了假设检验，以了解语言和时间段是否与情绪类别有关。结果表明，在特定时期内，土耳其人民在新冠肺炎问题上比世界上其他人更中立。此外，与语言无关，2021年1月上半月有更多负面和中性的推文，而下半月有更多正面的推文。据我们所知，这是第一项使用主题建模、情绪分析和假设测试方法分析新冠肺炎相关推文的研究，以两种语言比较当地和全球议程。

{"title":"Analysis of Public Agenda during Covid-19 Pandemics Based on Turkish and English Tweets Using Nonnegative Matrix Factorization and Hypothesis Testing","authors":"Mustafa Yavaş, A. Guran, Y. Ekinci","doi":"10.5755/j02.eie.31196","DOIUrl":"https://doi.org/10.5755/j02.eie.31196","url":null,"abstract":"In this study, Turkish and English tweets through Twitter Application Program Interface (API) between 1-31 January 2021 are analyzed with respect to Covid-19. The collected tweets are preprocessed, labeled with the Vader Sentiment library, and then analyzed by topic modeling with Nonnegative Matrix Factorization. The analysis show that the most frequently mentioned word is “vaccine/aşı” after “Covid”. The topics modelled in the study are grouped into themes and the themes are seen to be similar in both languages, which means that the Turkish and world agenda are not very different in terms of themes in pandemics. Moreover, hypothesis tests are conducted to understand whether language and time period are related to sentiment class. The results show that the Turkish people are more neutral about the Covid-19 issue than other people in the world during the given period of time. Moreover, independent of the language, there are more negative and neutral tweets in the first half of January 2021, whereas there are more positive tweets in the second half of the month. To the best of our knowledge, this is the first study to analyze Covid-19 related tweets in two languages to compare the local and global agendas using topic modeling, sentiment analysis, and hypothesis testing methods.","PeriodicalId":51031,"journal":{"name":"Elektronika Ir Elektrotechnika","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43062221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generalized Quasi-Orthogonal Functional Networks Applied in Parameter Sensitivity Analysis of Complex Dynamical Systems 广义拟正交函数网络在复杂动力系统参数灵敏度分析中的应用

IF 1.3 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Elektronika Ir Elektrotechnika

Pub Date : 2022-08-24 DOI: 10.5755/j02.eie.31110

Saša S. Nikolić, D. Antić, Nikola B. Dankovic, Aleksandra A. Milovanovic, D. Mitic, Miroslav B. Milovanović, Petar S. Djekic

This paper presents one possible application of generalized quasi-orthogonal functional networks in the sensitivity analysis of complex dynamical systems. First, a new type of first order (k = 1) generalized quasi-orthogonal polynomials of Legendre type via classical quasi-orthogonal polynomials was introduced. The short principle to design generalized quasi-orthogonal polynomials and filters was also shown. A generalized quasi-orthogonal functional network represents an extension of classical orthogonal functional networks and neural networks, which deal with general functional models. A sequence of the first order (k = 1) generalized quasi-orthogonal polynomials was used as a new basis in the proposed generalized quasi-orthogonal functional networks. The proposed method for determining the parameter sensitivity of complex dynamical systems is also given, and an example of a complex industrial system in the form of a tower crane was considered. The results obtained have been compared with different methods for parameter sensitivity analysis.

本文提出了广义拟正交函数网络在复杂动力系统灵敏度分析中的一种可能应用。首先，通过经典拟正交多项式，引入了一类新的勒让德型一阶（k=1）广义拟正交多项式。给出了设计广义拟正交多项式和滤波器的短原理。广义拟正交函数网络代表了处理一般函数模型的经典正交函数网络和神经网络的扩展。在所提出的广义拟正交函数网络中，使用一阶（k=1）广义拟正交多项式序列作为新的基。给出了确定复杂动力系统参数灵敏度的方法，并以塔式起重机形式的复杂工业系统为例。将所得结果与不同的参数灵敏度分析方法进行了比较。

{"title":"Generalized Quasi-Orthogonal Functional Networks Applied in Parameter Sensitivity Analysis of Complex Dynamical Systems","authors":"Saša S. Nikolić, D. Antić, Nikola B. Dankovic, Aleksandra A. Milovanovic, D. Mitic, Miroslav B. Milovanović, Petar S. Djekic","doi":"10.5755/j02.eie.31110","DOIUrl":"https://doi.org/10.5755/j02.eie.31110","url":null,"abstract":"This paper presents one possible application of generalized quasi-orthogonal functional networks in the sensitivity analysis of complex dynamical systems. First, a new type of first order (k = 1) generalized quasi-orthogonal polynomials of Legendre type via classical quasi-orthogonal polynomials was introduced. The short principle to design generalized quasi-orthogonal polynomials and filters was also shown. A generalized quasi-orthogonal functional network represents an extension of classical orthogonal functional networks and neural networks, which deal with general functional models. A sequence of the first order (k = 1) generalized quasi-orthogonal polynomials was used as a new basis in the proposed generalized quasi-orthogonal functional networks. The proposed method for determining the parameter sensitivity of complex dynamical systems is also given, and an example of a complex industrial system in the form of a tower crane was considered. The results obtained have been compared with different methods for parameter sensitivity analysis.","PeriodicalId":51031,"journal":{"name":"Elektronika Ir Elektrotechnika","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47288916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

首页上一页

类型

全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

数据库

全部 ACS Publications Elsevier ieeexplore Springer The Royal Society of Chemistry Wiley

期刊

Elektronika Ir Elektrotechnika

全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.

﹀