Serbian Journal of Electrical Engineering最新文献

Design of allpass-based IIR multi-notch filters with identical pole radiuses 具有相同极点半径的全通型IIR多陷波滤波器设计

Serbian Journal of Electrical Engineering Pub Date : 2023-01-01 DOI: 10.2298/sjee2301001k

I. Krstić

引用次数: 0

Expert system for FDI of dc motor faults using structured residuals design technique 基于结构化残差设计技术的直流电机故障直接诊断专家系统

Serbian Journal of Electrical Engineering Pub Date : 2023-01-01 DOI: 10.2298/sjee2301093a

Sanja Antic, Vanja Lukovic, Zeljko Djurovic

引用次数: 1

Lung sound classification using wavelet transform and entropy to detect lung abnormality 基于小波变换和熵的肺音分类检测肺异常

Serbian Journal of Electrical Engineering Pub Date : 2022-01-01 DOI: 10.2298/sjee2201079r

Achmad Rizal, Attika Puspitasari

引用次数: 5

Denoising electrocardiogram signals using multiband filter and its implementation on FPGA 基于多频带滤波器的心电图信号去噪及其FPGA实现

Serbian Journal of Electrical Engineering Pub Date : 2022-01-01 DOI: 10.2298/sjee2202115p

V. Patel, Ankit Shah

{"title":"Denoising electrocardiogram signals using multiband filter and its implementation on FPGA","authors":"V. Patel, Ankit Shah","doi":"10.2298/sjee2202115p","DOIUrl":"https://doi.org/10.2298/sjee2202115p","url":null,"abstract":"The electrocardiogram (ECG) signal carries vital information related to cardiac activities. While measuring ECG using electrodes, the signal is contaminated with powerline interference (PLI) from harmonics, baseline wandering (BW), motion artefacts (MA) and high frequency (HF) noise. The extraction of the ECG signal, without the loss of useful information from the noisy environment, is required. Therefore, the selection and implementation of an efficient filter design is proposed. The Finite Impulse Response (FIR)-based multiband needs separate digital filters, such as Lowpass, Highpass, and Bandstop Filter in cascade. The coefficients of the FIR multiband filter are optimised using a least squares optimisation method and realised in a direct form symmetrical structure. The capability of the proposed filter is evaluated on a Physionet ECG ID database, having records of inherent noisy ECG signals. The performance is also verified by measuring the power spectrum of the noisy and filtered ECG waveform. Also, the feasibility of the proposed multiband filter is investigated on Xilinx ISE and the design is implemented on a field programmable gate array (FPGA) platform. A low order simple multiband filter structure is designed and implemented on the reconfigurable FPGA device.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68754893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Early detection mechanism for Sybil attacks on wireless multimedia sensor networks 无线多媒体传感器网络Sybil攻击的早期检测机制

Serbian Journal of Electrical Engineering Pub Date : 2022-01-01 DOI: 10.2298/sjee2202193p

Basavaraj Patil, S. R. Biradar

引用次数: 0

On the application of wavelet transform and Huffman algorithm to Yorùbá language syntax text files compression 小波变换和霍夫曼算法在Yorùbá语言语法文本文件压缩中的应用

Serbian Journal of Electrical Engineering Pub Date : 2022-01-01 DOI: 10.2298/sjee2203351a

K. Amusa, A. Adewusi, T. Erinosho, S. Salawu, David Odufejo

{"title":"On the application of wavelet transform and Huffman algorithm to Yorùbá language syntax text files compression","authors":"K. Amusa, A. Adewusi, T. Erinosho, S. Salawu, David Odufejo","doi":"10.2298/sjee2203351a","DOIUrl":"https://doi.org/10.2298/sjee2203351a","url":null,"abstract":"Most algorithms of data compression were developed with English language as target text syntax. However, this paper approaches the problem of Yor?b? text files compression via the use of Discrete Wavelet Transform (DWT) and Huffman algorithm. Text files in Yor?b? language syntax are first converted into signal format that are then decomposed using DWT. The decomposed ASCII code representation of the text files are subsequently encoded using Huffman algorithm. Twenty different variants of DWTs taken from four families of wavelet filters (Haar, Daubechies, Symlets and bi-orthogonal) are considered to select the optimal DWT for Yor?b? text files compression. Furthermore, experiments are carried out in the proposed compression scheme with six different Yor?b? text files extracted from the open sources as input data sets. It is found that out of the twenty variants of DWT investigated, sym6 gives the best output for effective Yor?b? text files compression, due to its relatively high compression ratio, high compression factor and lowest compression error. Thus, sym6 as a wavelet transform is suitable for lossy text compression algorithm meant for Yor?b? language syntax text files.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68755561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental analysis of filtering-based feature selection techniques for fetal health classification 基于过滤的胎儿健康分类特征选择技术的实验分析

Serbian Journal of Electrical Engineering Pub Date : 2022-01-01 DOI: 10.2298/sjee2202207j

I. Jebadurai, G. Paulraj, Jebaveerasingh Jebadurai, S. Silas

{"title":"Experimental analysis of filtering-based feature selection techniques for fetal health classification","authors":"I. Jebadurai, G. Paulraj, Jebaveerasingh Jebadurai, S. Silas","doi":"10.2298/sjee2202207j","DOIUrl":"https://doi.org/10.2298/sjee2202207j","url":null,"abstract":"Machine learning techniques enable computers to acquire intelligence through learning. Trained machines can carry out various tasks, such as prediction, classification, clustering, and recommendation, within a wide variety of applications. Classification is a supervised learning technique that can be improved using feature selection techniques such as filtering, wrapping, and embedding. This paper explores the impact of filtering-based feature selection techniques on classification methods, and focuses on an analysis of correlationbased filtering techniques based on Pearson, Spearman, and Kendall rank correlation. Similarly, we explore the impacts of using statistical filtering techniques such as mutual information, chi-squared score, the ANOVA univariate test, and the univariate ROC-AUC. These filtering techniques are evaluated by implementing them with the k-nearest neighbor, support vector machine, decision tree, and Gaussian na?ve Bayes classification methods. Our experiments were carried out using a fetal heart rate dataset, and the performance of each combination of methods was measured based on precision, recall, F1-score, and accuracy. An analysis of the experimental results showed that the performance metrics for the Gaussian na?ve Bayes and k-nearest neighbor methods were improved by 3% through the use of the statistical feature selection technique, and a 4% improvement was observed for the decision tree and support vector machine methods using a correlation-based filtering technique. Of the statistical feature selection techniques, ANOVA and ROC-AUC were the best as they improved the accuracy by 92%; compared to the other correlation techniques, the Spearman correlation coefficient gave the best results, as it also improved the accuracy by 92%.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68755591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A study on transmission coil parameters of wireless power transfer for electric vehicles 电动汽车无线电力传输线圈参数研究

Serbian Journal of Electrical Engineering Pub Date : 2022-01-01 DOI: 10.2298/sjee2202129l

Duncan Lo, F. Juwono, W. Wong, I. Chew

引用次数: 0

Modeling and realization of photovoltaic simulator based on a buck DC-DC converter 基于降压DC-DC变换器的光伏模拟器建模与实现

Serbian Journal of Electrical Engineering Pub Date : 2022-01-01 DOI: 10.2298/sjee2202147a

N. Abjadi

引用次数: 0

Effect of defective NPC three level inverter on nonlinear command of induction motor NPC三电平逆变器故障对异步电机非线性控制的影响

Serbian Journal of Electrical Engineering Pub Date : 2022-01-01 DOI: 10.2298/sjee2202167k

Mendaz Kheira, Benhadda Yamina, Bounoua Houria

{"title":"Effect of defective NPC three level inverter on nonlinear command of induction motor","authors":"Mendaz Kheira, Benhadda Yamina, Bounoua Houria","doi":"10.2298/sjee2202167k","DOIUrl":"https://doi.org/10.2298/sjee2202167k","url":null,"abstract":"Speed Induction Motor (IM) control is an area of research that has been in evidence for some time now. In this paper, a nonlinear controller is presented for the induction motor drives. The nonlinear controller is designed based on an input-output feedback linearization control technique. The input-output feedback linearization control decouples the flux from the speed control and makes the synthesis of linear controllers possible. This article presented input-output linearization control of the induction motor associated with NPC three level inverter defective, the inverter faults are usually caused by operating faults in the switch elements. Switching defects occur in rectifier diodes, the capacitor and inverter IGBT switches. The inverter switches defected reduce the performance of the motor, in our study. We applied the input-output linearization control to test their robustness and performance for detection of fault influence on the physical parameters of the motor, for this purpose, we applied two faults, we started by creating a fault in two switches K1 and K7 which are in the first and second arm of the inverter. Then we created a fault in the three switches K1, K7 and K10 which are in the three arms of the inverter. The simulation results are done by the use of Matlab/Simulink that show the detection, fault effect on input-output linearization control of the different induction motor responses.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68755239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0