Facta Universitatis-Series Electronics and Energetics最新文献_第8页

Analysis of rotor asymmetry fault in three-phase line start permanent magnet synchronous motor 三相线路起动永磁同步电动机转子不对称故障分析

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Facta Universitatis-Series Electronics and Energetics Pub Date : 2021-01-01 DOI: 10.2298/fuee2104483k

M. Karami, N. Mariun, K. Ab, R. Mohd, N. Misron

引用次数: 2

Effects of connecting a scattered solar generation unit to the grid on the cloud passage using optimization algorithms 利用优化算法将分散太阳能发电机组接入电网对云通道的影响

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Facta Universitatis-Series Electronics and Energetics Pub Date : 2021-01-01 DOI: 10.2298/fuee2104605a

A. Aljbori, M. Zarif

{"title":"Effects of connecting a scattered solar generation unit to the grid on the cloud passage using optimization algorithms","authors":"A. Aljbori, M. Zarif","doi":"10.2298/fuee2104605a","DOIUrl":"https://doi.org/10.2298/fuee2104605a","url":null,"abstract":"Today, limitation of fossil fuel resources and other issues such as the possibility of the depletion of fossil energy reserves, global warming, environmental pollution, price instability, and the growing need for industrial and urban centers for energy have prompted the international community to seek appropriate alternatives. Such examples are nuclear energy, solar energy, geothermal energy, wind energy, and ocean waves. Renewable energy is generated owing to the simplicity of the applied technology compared to nuclear energy technologies. On the other hand, such energies play a key role in new energy systems in the world similar to nuclear waste. The increasing use of renewable energies has given rise to significant complications. One of the main operational issues in this regard is the uncertainty of electricity generation by solar power plants, which is caused by the passage of clouds. The present study aimed to investigate the effects of cloud passage on the production of solar power plants. Initially, a control system was designed to control a high-penetration solar power plant in the network, and the maximum allowable percentage of penetration was calculated for different loads. For this purpose, three algorithms (DE, PSO, and ICA) were used to determine the MPPT of the solar arrays in shady conditions, as well as the MPPT point of the solar arrays. According to the results, the colonial competition algorithm was faster compared to the other algorithms.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86750521","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

MEMS resonator mass loading noise model: The case of bimodal adsorbing surface and finite adsorbate amount MEMS谐振器质量加载噪声模型:双峰吸附面和有限吸附量的情况

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Facta Universitatis-Series Electronics and Energetics Pub Date : 2021-01-01 DOI: 10.2298/fuee2103367j

I. Jokić, O. Jakšić, M. Frantlović, Z. Jakšić, K. Guha

{"title":"MEMS resonator mass loading noise model: The case of bimodal adsorbing surface and finite adsorbate amount","authors":"I. Jokić, O. Jakšić, M. Frantlović, Z. Jakšić, K. Guha","doi":"10.2298/fuee2103367j","DOIUrl":"https://doi.org/10.2298/fuee2103367j","url":null,"abstract":"Modeling of adsorption and desorption in microelectromechanical systems (MEMS) generally is crucial for their optimization and control, whether it is necessary to decrease the adsorption-desorption influence (thus ensuring stable operation of ultra-precise micro and nanoresonators) or to increase it (and enhancing in this manner the sensitivity of chemical and biological resonant sensors). In this work we derive and use analytical mathematical expressions to model stochastic fluctuations of the mass adsorbed on the MEMS resonator (mass loading noise). We consider the case where the resonator surface incorporates two different types of binding sites and where non-negligible depletion of the adsorbate occurs in a closed resonator chamber. We arrive at a novel expression for the power spectral density of mass loading noise in resonators and prove the necessity of its application in cases when resonators are exposed to low adsorbate concentrations. We use the novel approach presented here to calculate the resonator performance. In this way we ensure optimization of these MEMS devices and consequentially abatement of adsorption-desorption noise-caused degradation of their operation, both in the case of micro/nanoresonators and resonant sensors. This work is intended for a general use in the design, development and optimization of different MEMS systems based on mechanical resonators, ranging from the RF components to chemical and biological sensors.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"40 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77714224","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

Damping analysis to improve the performance of shunt capacitive RF MEMS switch 提高并联电容式射频MEMS开关性能的阻尼分析

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Facta Universitatis-Series Electronics and Energetics Pub Date : 2021-01-01 DOI: 10.2298/fuee2103381t

L. Thalluri, K. Kumar, K. Sekhar, B. Babu, S. Kiran, K. Guha

{"title":"Damping analysis to improve the performance of shunt capacitive RF MEMS switch","authors":"L. Thalluri, K. Kumar, K. Sekhar, B. Babu, S. Kiran, K. Guha","doi":"10.2298/fuee2103381t","DOIUrl":"https://doi.org/10.2298/fuee2103381t","url":null,"abstract":"This paper describes the significance of the iterative approach and the structure damping analysis which help to get better the performance and validation of shunt capacitive RF MEMS switch. The micro-cantilever based electrostatic ally actuated shunt capacitive RF MEMS switch is designed and after multiple iterations on cantilever structure a modification of the structure is obtained that requires low actuation voltage of 7.3 V for 3 ?m deformation. To validate the structure we have performed the damping analysis for each iteration. The low actuation voltage is a consequence of identifying the critical membrane thickness of 0.7 ?m, and incorporating two slots and holes into the membrane. The holes to the membrane help in stress distribution. We performed the Eigen frequency analysis of the membrane. The RF MEMS switch is micro machined on a CPW transmission line with Gap- Strip-Gap (G-S-G) of 85 ?m - 70 ?m - 85 ?m. The switch RF isolation properties are analyzed with high dielectric constant thin films i.e., AlN, GaAs, and HfO2. For all the dielectric thin films the RF MEMS switch shows a high isolation of -63.2 dB, but there is shift in the radio frequency. Because of presence of the holes in the membrane the switch exhibits a very low insertion loss of -0.12 dB.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"38 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76521793","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

Generation of sequences of strong electric monopulses in nitride films 氮化膜中强电单脉冲序列的产生

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Facta Universitatis-Series Electronics and Energetics Pub Date : 2021-01-01 DOI: 10.2298/fuee2102187g

V. Grimalsky, S. Koshevaya, J. Escobedo-Alatorre, A. Kotsarenko

{"title":"Generation of sequences of strong electric monopulses in nitride films","authors":"V. Grimalsky, S. Koshevaya, J. Escobedo-Alatorre, A. Kotsarenko","doi":"10.2298/fuee2102187g","DOIUrl":"https://doi.org/10.2298/fuee2102187g","url":null,"abstract":"This paper presents theoretical investigation of the excitation of the sequences of strong nonlinear monopulses of space charge waves from input small envelope pulses with microwave carrier frequencies due to the negative differential conductivity in n-GaN and n-InN films. The stable numerical algorithms have been used for nonlinear 3D simulations. The sequences of the monopulses of the strong electric field of 3 - 10 ps durations each can be excited. The bias electric field should be chosen slightly higher than the threshold values for observing the negative differential conductivity. The doping levels should be moderate 1016 -1017 cm-3in the films of ? 2 mm thicknesses. The input microwave carrier frequencies of the exciting pulses of small amplitudes are up to 30 GHz in n-GaN films, whereas in n-InN films they are lower, up to 20 GHz. The sequences of the electric monopulses of high peak values are excited both in the uniform nitride films and in films with non-uniform conductivity. These nonlinear monopulses in the films differ from the domains of strong electric fields in the bulk semiconductors. In the films with non-uniform doping the nonlinear pulses are excited due to the inhomogeneity of the electric field near the input end of the film and the output nonlinear pulses are rather domains.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"28 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87307086","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

Evaluation of electronic readiness level: A case of financial institution 电子准备水平评估:以金融机构为例

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Facta Universitatis-Series Electronics and Energetics Pub Date : 2021-01-01 DOI: 10.2298/fuee2103401k

H. Kardanmoghaddam, Nafiseh Sarboland

{"title":"Evaluation of electronic readiness level: A case of financial institution","authors":"H. Kardanmoghaddam, Nafiseh Sarboland","doi":"10.2298/fuee2103401k","DOIUrl":"https://doi.org/10.2298/fuee2103401k","url":null,"abstract":"Electronic readiness is the ability to accept, use and apply information and communication technology in an organization. To effectively implement information and communication technologies, the first step is to measure the electronic readiness of companies and organizations to adopt these new technologies. In this research, the level of electronic readiness of Mellat Bank has been studied in Khorasan Razavi province in Iran, from the perspective of the employees in cities of Feyz Abad, Kashmar, Bajestan, Gonabad and Bazar and Central branches in Khorasan Razavi province. Electronic readiness levels of Bank Mellat have been evaluated in the following dimensions: Strategy readiness and IT policies, IT infrastructure readiness, management readiness, legal-juridical readiness, culture and human resource (personnel) readiness and Process readiness. This research is based on descriptive research design and applied purpose. The statistical population of the personnel includes people with sufficient and necessary information in the field of financial and banking activities regarding e-commerce issues and e-readiness, which was a total population of 74 people. 50 questionnaires consisting of 30 questions were distributed using non-probability convenience sampling method of which 42 questionnaires were accurate. The SPSS15 software was used for analysis. The results of the analysis showed that the level of electronic readiness of Mellat Bank in Khorasan Razavi province in the studied branches is significantly higher than the average theoretical score (3) (p <0.001) in total and its components. This demonstrates the level of electronic readiness of Mellat Bank in Khorasan Razavi is high (above average) from the perspective of the studied personnel. Also, there is no significant difference in the average score of the perspective of personnel based on gender, age, years of service, level of education, field of study and organizational position concerning the level of electronic readiness in Mellat Bank in Khorasan Razavi.","PeriodicalId":44296,"journal":{"name":"Facta Universitatis-Series Electronics and Energetics","volume":"467 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80137735","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

Introducing an optimal QCA crossbar switch for baseline network 介绍了一种用于基线网络的最优QCA交叉开关

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Facta Universitatis-Series Electronics and Energetics Pub Date : 2021-01-01 DOI: 10.2298/fuee2103445s

R. Sabbaghi‐Nadooshan

引用次数: 4

Dual wideband and high gain microstrip antenna for wireless system 用于无线系统的双宽带高增益微带天线

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Facta Universitatis-Series Electronics and Energetics Pub Date : 2021-01-01 DOI: 10.2298/fuee2103435b

Biplab Bag, S. Biswas, P. Sarkar

引用次数: 0

Analytical study of effect of energy band parameters and lattice temperature on conduction band offset in AlN/Ga2O3 HEMT AlN/Ga2O3 HEMT中能带参数和晶格温度对导带偏移影响的分析研究

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Facta Universitatis-Series Electronics and Energetics Pub Date : 2021-01-01 DOI: 10.2298/fuee2103323s

Rajan Singh, T. Lenka, Hieu Nguyen

引用次数: 0

Cuckoo search algorithm to solve the problem of economic emission dispatch with the incorporation of facts devices under the valve-point loading effect 采用布谷鸟搜索算法，结合事实装置，解决了阀点负荷作用下的经济排放调度问题

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Facta Universitatis-Series Electronics and Energetics Pub Date : 2021-01-01 DOI: 10.2298/fuee2104569b

Larouci Benyekhlef, S. Abdelkader, Boudjella Houari, Ayad Ahmed Nour El Islam

引用次数: 1