International Journal of Electronics and Telecommunications最新文献_第2页

Mobile (wireless) telecommunication sector: an Indian perspective and PESTLE analysis 移动（无线）电信行业：印度视角和 PESTLE 分析

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International Journal of Electronics and Telecommunications Pub Date : 2024-07-25 DOI: 10.24425/ijet.2024.149577

Chandrahash Patel, Kunal Sinha

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Implementation of Doppler-Based Location Sensor on Unmanned Aerial Vehicle 在无人飞行器上实现基于多普勒的定位传感器

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International Journal of Electronics and Telecommunications Pub Date : 2024-07-25 DOI: 10.24425/ijet.2024.149605

Rafał Szczepanik

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Fractal dragon curve microstrip antenna for Dual-Band WLAN communications 用于双频无线局域网通信的分形龙形曲线微带天线

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International Journal of Electronics and Telecommunications Pub Date : 2024-07-25 DOI: 10.24425/ijet.2024.149592

Karol Dragowski, Mateusz Pasternak

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Beamforming in near-field - metaheuristic approach and experimental tests in an anechoic chamber 近场波束成形 - 元启发式方法和消声室实验测试

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International Journal of Electronics and Telecommunications Pub Date : 2024-07-25 DOI: 10.24425/ijet.2024.149582

Agnieszka Wielgus, Bogusław Szlachetko, Michał Łuczyński

{"title":"Beamforming in near-field - metaheuristic approach and experimental tests in an anechoic chamber","authors":"Agnieszka Wielgus, Bogusław Szlachetko, Michał Łuczyński","doi":"10.24425/ijet.2024.149582","DOIUrl":"https://doi.org/10.24425/ijet.2024.149582","url":null,"abstract":"A set of microphones spatially arranged in space in a specific pattern is called a microphone array. It can be used to extract and enhance the signal of interest from its observation corrupted by other interfering signals, such as noise or to estimate the direction of arrival of a source. In this paper we focus on a problem in which the desired signal (speech signal) is interfered by other signal with fully overlapping bandwidth but with different localization. Our goal is to attenuate the interfering signal. We experimentally study the method in which microphones do not have to be equally spaced and all information regarding signal phase is hidden in a transfer function of the microphone. We focus on determining the microphones positions and FIR filter coefficients so that the actual output the beamformer is as close as possible to the desired one (the level of speech signal remains unchanged, while the interfering signal is attenuated) in the sense of �� norm. To solve this problem, we use a metaheuristic algorithm. Next, we construct the array and make an experiment in anechoic chamber. The initial results of the experiment show that the proposed method can be applied for array designing.","PeriodicalId":13922,"journal":{"name":"International Journal of Electronics and Telecommunications","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141805532","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}

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Enhanced optimization model decision efficient multi product retail 强化优化模型决策高效的多产品零售

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International Journal of Electronics and Telecommunications Pub Date : 2024-07-25 DOI: 10.24425/ijet.2024.149594

Solly Aryza, Syahril Efendi, Poltak Sihombing, Sawaluddin

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Lossy coding and bitrate effects on changes in formant frequencies in Japanese and English speech signals 有损编码和比特率对日语和英语语音信号中声母频率变化的影响

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International Journal of Electronics and Telecommunications Pub Date : 2024-07-25 DOI: 10.24425/ijet.2024.149584

M. Kucharski, Stefan Brachmański

{"title":"Lossy coding and bitrate effects on changes in formant frequencies in Japanese and English speech signals","authors":"M. Kucharski, Stefan Brachmański","doi":"10.24425/ijet.2024.149584","DOIUrl":"https://doi.org/10.24425/ijet.2024.149584","url":null,"abstract":"Since speaker recognition and verification became heavily used technology, both in professional applications like forensics and more everyday ones, the question arose: what factors can impact results of those processes? One thing that may be important with respect to this subject is lossy coding, as some of the information contained in an original file is lost in the coding process. In the era of globalization, not only native languages or languages of neighboring countries are of interest to researchers, but also those quite far, especially from Asia – the biggest exporter of goods and services to Europe. Those economic relationships are usually connected with the interchange of personnel, which further shortens geographical distance. The article presents the results that are a continuation of research on the behavior of Japanese language formants. Earlier research focused on changes occurring for the first and second formants. This article presents changes observed for the third and fourth formants. The knowledge of these changes is indicated in the process of speaker identification in forensics using the spectrographic method. At the Department of Acoustics and Multimedia, Wroclaw University of Science and Technology and in many centers around the world, the auditoryspectrographic method is used, which is a combination of the aural and spectrographic methods. In the spectrographic part, a person is identified on the basis of a comparison of the formants’ trajectory.","PeriodicalId":13922,"journal":{"name":"International Journal of Electronics and Telecommunications","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141804763","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}

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Analysis of solar power public street lighting optimization with Pvsyst software in a residential complex area 利用 Pvsyst 软件分析住宅区太阳能公共街道照明的优化问题

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International Journal of Electronics and Telecommunications Pub Date : 2024-07-25 DOI: 10.24425/ijet.2024.149604

I. Simanjuntak, Heryanto, Akhmad Wahyu Dani, Ketty Salamah, L. M. Silalahi, Marsuki

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Objective assessment of the speech quality broadcasted by local Digital Radio in selected locations in Wroclaw 对弗罗茨瓦夫选定地点当地数字广播的语音质量进行客观评估

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International Journal of Electronics and Telecommunications Pub Date : 2024-07-25 DOI: 10.24425/ijet.2024.149585

Stefan Brachmański, Maurycy Kin, Natalia Rurzyńska

{"title":"Objective assessment of the speech quality broadcasted by local Digital Radio in selected locations in Wroclaw","authors":"Stefan Brachmański, Maurycy Kin, Natalia Rurzyńska","doi":"10.24425/ijet.2024.149585","DOIUrl":"https://doi.org/10.24425/ijet.2024.149585","url":null,"abstract":"The development of digital radio, observed in recent years, and the advantages offered by this medium are resulting in the expansion of the audience. In order to ensure the proper quality of broadcasting, it is necessary to monitor this quality. The assessment based on listening tests is very expensive and organizationally inconvenient. The development of methods for objective evaluation of signals makes it possible to monitor the quality of transmitted content, without the need for troublesome procedures associated with subjective evaluation. The good correlation of subjective evaluation and objective measurements in the transmission of perceptually encoded signals, reported in the literature, may allow for random quality monitoring. The authors decided to test the feasibility of using two objective evaluation methods to assess the quality of the speech signal transmitted on digital radio by comparing the results obtained with the subjective evaluation. The paper presents the results of objective measurements of speech quality transmitted via Digital Audio Broadcasting+ in Wroclaw agglomeration. Measurements have been done in various city sites in order to determine the influence of the location on speech quality. The obtained results of the assessment performed by the use of two methods of testing: PESQ and POLQA, allowed to find a correlation between the objective and subjective results of quality evaluations. The method of objective testing may be used for monitoring the quality of signals in Digital Audio Broadcasting networks especially spoken broadcasts.","PeriodicalId":13922,"journal":{"name":"International Journal of Electronics and Telecommunications","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141803494","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

Support vector machine to criminal recidivism prediction 支持向量机预测累犯率

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International Journal of Electronics and Telecommunications Pub Date : 2024-07-25 DOI: 10.24425/ijet.2024.149598

O. Kovalchuk, Ruslan Shevchuk, Ludmila Babala, M. Kasianchuk

{"title":"Support vector machine to criminal recidivism prediction","authors":"O. Kovalchuk, Ruslan Shevchuk, Ludmila Babala, M. Kasianchuk","doi":"10.24425/ijet.2024.149598","DOIUrl":"https://doi.org/10.24425/ijet.2024.149598","url":null,"abstract":"Internal security of the state is one of the prerequisites for sustainable development. To ensure the public safety and personal security of citizens, it is necessary to develop effective measures to reduce crime and prevent crime in the future. The starting point for the development and practical implementation of an effective strategy to combat crime or prevent certain crimes is criminological forecasting. Individual forecasting is aimed at determining the possibility of committing a crime (crimes) in the future by a certain person or group of persons. For risk assessment, the following are traditionally used machine learning models. Such models also provide qualitative assessments in the scientific prediction of the likelihood and possibilities of committing a repeat criminal offense. Knowledge gained from the application of machine learning algorithm, can provide justice authorities with anticipatory information that is essential for developing a general concept of combating crime. The development of applied models for crime analysis and forecasting can become a reliable tool to support decision-making in predicting likely criminal behavior in the future and ensuring the internal security of the state. In this paper, the results of the application are presented by the machine-learning algorithms Support Vector Machine (SVM) for assessment of the risk of recidivism of criminal offenses by persons who have already been convicted of such a crime in the past. The data set consisted of the 12,000 criminal defendants’ criminal profile information in Ukraine. The constructed classifier has a high precision (98.67%), recall (97.53%) and is qualitative (AUC is equal 0.981). The created SVM model can be applied to new data set to predict the risk of reoffending by convicted individuals in the future.","PeriodicalId":13922,"journal":{"name":"International Journal of Electronics and Telecommunications","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141805067","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

Space 4.0 – a common, democratic European space 太空 4.0--民主的欧洲共同太空

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International Journal of Electronics and Telecommunications Pub Date : 2024-07-25 DOI: 10.24425/ijet.2024.149606

Ryszard S. Romaniuk, Piotr Orleański

{"title":"Space 4.0 – a common, democratic European space","authors":"Ryszard S. Romaniuk, Piotr Orleański","doi":"10.24425/ijet.2024.149606","DOIUrl":"https://doi.org/10.24425/ijet.2024.149606","url":null,"abstract":"Regardless of differences in political views on the scope and depth of the European integration, there are so many areas of possible and very beneficial integration that it is difficult to include them all in the area of controversy. One such area of necessary and extremely profitable European integration is, among others, space. Unless we go back a few decades and consider space, even today, to be the pride only of those nations that have overcome the space barrier. This would be an absurdity difficult to imagine in today's Europe. Space 4.0 is, in its shortest definition and in relation to European context, a great, long-term effort by our entire community to democratize space over Europe. It was high time for ESA to make this decision in 2016. Space 4.0 is a large sector project with general social ambitions, contributing to the Industry 4.0 project and the idea of European Society 4.0. Europe was maturing for this decision on many levels: political, social, but mainly economic and competitive. We will soon celebrate the 10th anniversary of this decision, so we would like to remind again where we direct our European space dreams, and maybe it is time for a slightly earlier summary of activities during this period of almost a decade, especially from our Polish, perhaps slightly subjective perspective. The Polish version of this article is published concurrently in Elektronika journal by SEP - Assoc.Pol.El.Eng.","PeriodicalId":13922,"journal":{"name":"International Journal of Electronics and Telecommunications","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141805580","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