International Journal of Research In Science & Engineering最新文献_第5页

An Advanced Power Flow Control in Small Scale DC Power Structure by Using Multilevel Converter 基于多电平变换器的小型直流电源结构潮流控制方法研究

International Journal of Research In Science & Engineering Pub Date : 2021-11-19 DOI: 10.55529/ijrise.26.1.8

Mangi Shetti Harsha Vardhan, S. Maddilety, D. S. Babu

{"title":"An Advanced Power Flow Control in Small Scale DC Power Structure by Using Multilevel Converter","authors":"Mangi Shetti Harsha Vardhan, S. Maddilety, D. S. Babu","doi":"10.55529/ijrise.26.1.8","DOIUrl":"https://doi.org/10.55529/ijrise.26.1.8","url":null,"abstract":"Because they combine outstanding harmonic performance with low switching frequencies, multilevel transforms are attractive options in Small-Scale DC Power Ne2rks. High dependability can also be obtained by including redundant submodules into the cascaded transform chain. DC microgrids are developing as the next generation of smallscale electric power structures, with very low line impedance. This phenomena creates high currents in microgrids even with little voltage changes; hence, a power flow controller must have quick transient reaction and accurate power flow management. Multi-level transforms are used as power flow controllers in this work to provide high speed and high accuracy power flow management in a dc microgrid. Because a multi-level transform is employed, the output filter can be tiny. The linear controller, such as PI or PID, is established and widely used in the power electronics sector, but its performance degrades as system parameters change. In this paper, a neural structure (NN) based voltage management technique for a DC-DC transform is developed. This project also shows how to construct the output LC filter of a multi-level transform to meet a current ripple requirement. In comparison to typical 2-level transforms, we can demonstrate that a multilevel transform with a smaller filter may provide high-speed and high-precision power flow management for low line impedance situations. MATLAB/Simulink Simulation results are used to evaluate the control performance of each output current in the step response while accounting for transient variations in the power flow.","PeriodicalId":263587,"journal":{"name":"International Journal of Research In Science & Engineering","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131184758","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

Analysis of Microbial Growth Models for Microorganisms in Chicken Manure Digester 鸡粪消化池微生物生长模式分析

International Journal of Research In Science & Engineering Pub Date : 2021-11-19 DOI: 10.55529/ijrise.12.1.24

A. Abubakar, Zahra Soltanifar, Y. Luka, Eme William Udoh, M. Hamadou

{"title":"Analysis of Microbial Growth Models for Microorganisms in Chicken Manure Digester","authors":"A. Abubakar, Zahra Soltanifar, Y. Luka, Eme William Udoh, M. Hamadou","doi":"10.55529/ijrise.12.1.24","DOIUrl":"https://doi.org/10.55529/ijrise.12.1.24","url":null,"abstract":"Several microorganisms are there in chicken manure (CM) but Salmonella, Cryptosporidium and Escheridia coli are the most identified. Objective of this research includes, carrying out microbial count in the CM substrate for 40 days retention time in a digester, uterlizing kinetic expressions satisfying the process and fitting results obtained with 26 existing microbial growth kinetic models. Results shows that microbes inside the CM slurry, survived for a full period of 37 days divided into 7 days of acclimatization, 23 days of growth and another 7 days of equal rate of death and multiplication. Findings shows that the maximum specific growth rate, ????????????????, estimated from the basic Monod equation, of the organisms is 0.0076hr-1 and the half-saturation constant, ????????, is ????. ???????????? × ???????????? mg/l which indicates how sufficient the substrate concentration is for the bacteria to feed on. Not all 26 growth kinetic models found in the literature fit the measured experimental data. However, Monod with decay rate, Wayman and Tseng, Han and Levenspiel, Luong and Moser models fit the Monod values after regressing with POLYMATH 6.10 Educational Release.","PeriodicalId":263587,"journal":{"name":"International Journal of Research In Science & Engineering","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126106993","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

A Network Management Model for Device-To-DeviceCommunication in 5G Networks 5G网络中设备对设备通信的网络管理模型

International Journal of Research In Science & Engineering Pub Date : 2021-09-26 DOI: 10.55529/ijrise.11.13.27

引用次数: 1

An Examination of the Effects of a Research-Based Instructional Model on Students' Critical Thinking Abilities in an Introductory Science Course 科学导论课程中研究性教学模式对学生批判性思维能力影响的检验

International Journal of Research In Science & Engineering Pub Date : 2021-09-25 DOI: 10.55529/ijrise.11.1.12

Almighty C. Tabuena Tabuena, Yvon Mae H. Tabuena, Dr. Oscar Lauber, Ángel Geovanny Rochina Chisag

{"title":"An Examination of the Effects of a Research-Based Instructional Model on Students' Critical Thinking Abilities in an Introductory Science Course","authors":"Almighty C. Tabuena Tabuena, Yvon Mae H. Tabuena, Dr. Oscar Lauber, Ángel Geovanny Rochina Chisag","doi":"10.55529/ijrise.11.1.12","DOIUrl":"https://doi.org/10.55529/ijrise.11.1.12","url":null,"abstract":"The purpose of this research was to examine how well the RBL model is being used to teach science to high school students in order to foster critical thinking. The research strategy for this investigation was sequential and exploratory, using a combination of methods. Quantitative data were collected after initially focusing on qualitative information. Quantitative data was gathered using essay examinations, while qualitative data was gathered through observation and interviews. There was a sampling phase before the actual study began. Thirtyfive aspiring primary school teachers from throughout the nation served as samples. The investigation occurred during the spring 2019 semester. A quasi-experimental design with a preand post-test for a single group was used for the quantitative data analysis. The average rating for the research treatments across four separate observations was 5.625 (preliminary activities: 4.736, core activities: 4.625, and closing activities: 4.66; rating scale: very excellent; range: 1- 4). The N-gain score was 57.60% in the medium category, demonstrating that introducing the RBL model to the study of energy in the natural sciences might boost students' capacity for critical thought. The average of the pre- and post-test ratings (47.95 and 778.2) was used to calculate this improvement (0-100). The results of this study may help professors and researchers develop new ways of teaching about energy that are more effective in developing students' capacity for critical thinking and analysis.","PeriodicalId":263587,"journal":{"name":"International Journal of Research In Science & Engineering","volume":"208 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115824426","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: 1

International Journal of Research In Science &amp; Engineering最新文献

International Journal of Research In Science & Engineering最新文献