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Energy and Power Engineering 2013年第4期5卷 423-428页

作者： Shahrukh Adnan Khan Rajprasad K. rajkumar Rajparthiban K. rajkumar Aravind CV Faculty of Engineering University of Nottingham Malaysia Campus Jalan Broga Semenyih Malaysia School of Engineering Taylor’s University Selangor Malaysia

This paper gives performance analysis of a three phase Permanent magnet Synchronous Generator (PmSG) connected to a Vertical Axis Wind Turbine (VAWT). Low speed wind condition (less than 5 m/s) is taken in consideration and the entire simulation is carried in matlab/Simulink environment. The rated power for the generator is fixed at 1.5 KW and number of pole at 20. It is observed under low wind speed of6 m/s, a turbine having approximately1 mof radius and2.6 mof height develops 150 Nm mechanical torque that can generate power up to 1.5 KW. The generator is designed using modeling tool and is fabricated. The fabricated generator is tested in the laboratory with the simulation result for the error analysis. The range of error is about 5%-27% for the same output power value. The limitations and possible causes for error are presented and discussed.

关键词： Vertical Axis Wind Turbine Three Phase multi-pole permanent magnet Synchronous Generator Low Wind Speed modeling Performance Analysis

Comparison between Different Shapes of Structure by Response Spectrum method of Dynamic Analysis

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Open Journal of Civil Engineering 2016年第2期6卷 131-138页

作者： Jaya rajkumar Ramchandani madhuri Nilesh mangulkar Department of Civil Engineering J.N.E.C Aurangabad (M.S) India

Several procedures for non-linear static and dynamic analysis of structures have been developed in recent years. In this paper, the response spectrum analysis is performed on two different shapes i.e. regular and irregular shape of structure by using STAAD PRO. And the comparison results are studied and compared accounting for the earthquake characteristics and the structure dynamic characteristics. As the results show that the earthquake response peak values and the main response frequencies are very close and comparable. It can be referred to by the engineering applications.

关键词： Seismic Response Spectrum Analysis STAAD PRO Dynamic Characteristics Earthquake Response Peak

Extended Deep Learning Algorithm for Improved Brain Tumor Diagnosis System

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Intelligent Automation & Soft Computing 2024年第1期39卷 33-55页

作者： m.Adimoolam K.maithili N.m.Balamurugan R.rajkumar S.Leelavathy Raju Kannadasan mohd Anul Haq Ilyas Khan ElSayed m.Tag El Din Arfat Ahmad Khan Department of Computer Engineering Government Polytechnic CollegeSevvapetTiruvallurTamil Nadu602025India Department of Computer Science and Engineering KG Reddy College of Engineering and TechnologyHyderabadTelangana500075India Department of Computer Science and Engineering Sri Venkateswara College of EngineeringSriperumbudurChennai602117India Department of Computer Science and Engineering Annamalai UniversityChidambaramTamil Nadu608002India Department of Computer Science and Engineering Aarupadai Veedu Institute of TechnologyVinayaka Mission Research FoundationPaiyanurTamil Nadu603104India Department of Electrical and Electronics Engineering Sri Venkateswara College of EngineeringSriperumbudur602117India Department of Computer Science College of Computer and Information SciencesMajmaah UniversityAl-Majmaah11952Saudi Arabia Department of mathematics College of Science Al-ZulfiMajmaah UniversityAl-Majmaah11952Saudi Arabia Electrical Engineering Department Faculty of Engineering&TechnologyFuture University in EgyptNew Cairo11835Egypt Department of Computer Science College of ComputingKhon Kaen UniversityKhon Kaen40002Thailand

At present,the prediction of brain tumors is performed using machine Learning(mL)and Deep Learning(DL)*** various mL and DL algorithms are adapted to predict brain tumors to some range,some concerns still need enhancement,particularly accuracy,sensitivity,false positive and false negative,to improve the brain tumor prediction system ***,this work proposed an Extended Deep Learning Algorithm(EDLA)to measure performance parameters such as accuracy,sensitivity,and false positive and false negative *** addition,these iterated measures were analyzed by comparing the EDLA method with the Convolutional Neural Network(CNN)way further using the SPSS tool,and respective graphical illustrations were *** results were that the mean performance measures for the proposed EDLA algorithm were calculated,and those measured were accuracy(97.665%),sensitivity(97.939%),false positive(3.012%),and false negative(3.182%)for ten *** in the case of the CNN,the algorithm means accuracy gained was 94.287%,mean sensitivity 95.612%,mean false positive 5.328%,and mean false negative 4.756%.These results show that the proposed EDLA method has outperformed existing algorithms,including CNN,and ensures symmetrically improved *** EDLA algorithm introduces novelty concerning its performance and particular activation *** proposed method will be utilized effectively in brain tumor detection in a precise and accurate *** algorithm would apply to brain tumor diagnosis and be involved in various medical diagnoses *** the quantity of dataset records is enormous,then themethod’s computation power has to be updated.

关键词： Brain tumor extended deep learning algorithm convolution neural network tumor detection deep learning

Native and transplant kidney histopathological manifestations in association with COVID-19 infection: A systematic review

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World Journal of Transplantation 2021年第11期11卷 480-502页

作者： Vishnu Jeyalan Joshua Storrar Henry H L Wu Arvind Ponnusamy Smeeta Sinha Philip A Kalra rajkumar Chinnadurai Department of Renal medicine Royal Preston HospitalPreston PR29HTUnited Kingdom Department of Renal medicine Salford Care OrganisationNorthern Care Alliance NHS Foundation TrustSalford M68HDUnited Kingdom Faculty of Biology Medicine and HealthUniversity of ManchesterManchester M139PLUnited Kingdom

BACKGROUND Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)can result in clinically significant multi-system disease including involvement in the *** underlying histopathological processes were unknown at the start of the *** case reports and series have been published describing the underlying renal histopathology from kidney biopsies,we have started to gain an insight into the renal manifestations of this novel *** To provide an overview of the current literature on the renal histopathological features and mechanistic insights described in association with coronavirus disease 2019(COVID-19)*** A systematic review was performed by conducting a literature search in the following websites-‘Pubmed’,‘Web of Science’,‘Embase’and‘medline-ProQuest’with the following search terms-“COVID-19 AND kidney biopsy”,“COVID-19 AND renal biopsy”,“SARS-CoV-2 AND kidney biopsy”and“SARS-CoV-2 AND renal biopsy”.We have included published data up until February 15,2021,which includes kidney biopsies(native,transplant and postmortem)from patients with *** on clinical presentation,histopathological features,management and outcome was extracted from the reported *** The total number of biopsies reported on here is 288,of which 189 are postmortem,84 native and 15 *** results are varied and show underlying pathologies ranging from collapsing glomerulopathy and acute tubular injury(ATI)to anti-nuclear cytoplasmic antibody associated vasculitis and pigment *** was variation in the specific treatment used for the various renal conditions,which included steroids,hydroxychloroquine,eculizumab,convalescent plasma,rituximab,anakinra,cyclophosphamide and renal replacement therapy,amongst *** pathological process which occurs in the kidney following COVID-19 infection and leads to the described biopsy findings has been hypothesized in some conditions but not others(for example,sepsis related hypoperf

关键词： COVID-19 Histopathology Kidney biopsy Transplant SARS-CoV-2

Antihypertensive prescribing patterns in non-dialysis dependent chronic kidney disease:Findings from the Salford Kidney Study

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World Journal of Nephrology 2023年第5期12卷 168-181页

作者： rajkumar Chinnadurai Henry H L Wu Jones Abuomar Sharmilee Rengarajan David I New Darren Green Philip A Kalra Donal O’Donoghue Renal Research Centre&Department of Renal medicine Northern Care Alliance NHS Foundation TrustSalford M68HDUnited Kingdom Department of Renal Research Kolling Institute of Medical ResearchRoyal North Shore Hospital&The University of SydneySt.Leonards(Sydney)2065New South WalesAustralia Faculty of Biology Medicine&HealthThe University of ManchesterManchester M17HRUnited Kingdom

BACKGROUND Hypertension is commonly observed in patients living with chronic kidney disease(CKD).Finding an optimal treatment regime remains challenging due to the complex bidirectional cause-and-effect relationship between hypertension and *** remains variability in antihypertensive treatment *** To analyze data from the Salford Kidney Study database in relation to antihypertensive prescribing patterns amongst CKD *** The Salford Kidney Study is an ongoing prospective study that has been recruiting CKD patients since *** patients are followed up annually,and their medical records including the list of medications are updated until they reach study endpoints[starting on renal replacement therapy or reaching estimated glomerular filtration rate(eGFR)expressed as mL/min/1.73 m2≤10 mL/min/1.73 m2,or the last follow-up date,or data lock on December 31,2021,or death].Data on antihypertensive prescription practices in correspondence to baseline eGFR,urine albumin-creatinine ratio,primary CKD aetiology,and cardiovascular disease were *** between patients who were prescribed three or more antihypertensive agents and their clinical outcomes were studied by Cox regression ***-meier analysis demonstrated differences in survival *** Three thousand two hundred and thirty non-dialysis-dependent CKD patients with data collected between October 2002 and December 2019 were *** median age was 65 years.A greater proportion of patients were taking three or more antihypertensive agents with advancing CKD stages(53%of eGFR≤15 mL/min/1.73 m2 vs 26%of eGFR≥60 mL/min/1.73 m2,Pmber of patients receiving more classes of antihypertensive agents was observed as the urine albumin-creatinine ratio category increased(category A3:62%vs category A1:40%,Pmber of individuals prescribed renin angiotensin system *** pr

关键词： Hypertension Chronic kidney disease Antihypertensive agents Prescribing patterns Cardiovascular complications Renin angiotensin system blockers

Petrological and Geochemical Studies of Lepidolite (LCT Type) and Non-Lepidolite Pegmatite’s from Chakrasila, Dhubri District, Assam, North East India

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Open Journal of Geology 2021年第3期11卷 81-104页

作者： rajkumar R. meshram Bhupender Singh mukesh Kumar mishra H. Hrushikesh Alam Siddiqui Devaseesh Shukla Rafique Akhtar Tushar m. meshram Regional Petrology Division Geological Survey of India CR Nagpur India Geological Survey of India State Unit: P& H NR Chandigarh India Geological Survey of India Western Region Jaipur India Geological Survey of India State Unit: Assam NER Guwahati India Geological Survey of India Central Region Bhopal India

Lepidolite pegmatite occurs as intrusive within biotite gneiss and amphibolite of Assam meghalaya Gneissic Complex (AmGC) or Precambrian Gneissic Complex in the Dhubri district, Assam. AmGC is the north western extension of the Proterozoic rocks of meghalaya Plateau or Shillong plateau. In the field it occurs as small to large veins and scattered boulders. Lepidolite pegmatite is later intruded by non lepidolite pegmatite. Pegmatites are medium to coarse grained with quartz and K-feldspar. It also contains lepidolite, which occurs in the form of flakes and clusters varying from pink to purple in colour. Petrography of lepidolite pegmatite reveals lepidolite as major constituents with quartz, K-feldspar and muscovite as minor constituents. XRD analysis reveals lepidolite (muscovite) is major mineral phase with kaliophilite in minor amount. Geochemically, they are calc-alkaline to high calc-alkaline and per-aluminous in nature. On the basis of Alumina Saturation Index (ASI), these pegmatites resemble Lithium-Cesium-Tantalum (LCT) family and compositional affinity with S-type granites of orogenic environments. Trace element compositions (Rb, Sr, Ba) indicate crystal fractionations, variable degrees of fractionation, highly evolved nature of pegmatite’s and strongly differentiated granites protoliths as source. The different tectonic discrimination diagrams indicate S-type and I-type melt for pegmatite derivations. Therefore, both the studied pegmatites could be an evolved variety of granitic rocks that originated from the same magma. The REE is relatively low to moderate.

关键词： Lepidolite LCT XRD Per-Aluminous Fractionations AmGC and Shillong Plateau

Energy Harvesting——Technical Analysis of Evolution,Control Strategies,and Future Aspects

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Journal of Electronic Science and Technology 2019年第2期17卷 116-125页

作者： mD. Shahrukh Adnan Khan md. Tanbhir Hoq A. H. m. Zadidul Karim md. Khairul Alam masum Howladerrajkumar Rajprasad Kumar School of Science and Engineering Canadian University of Bangladesh Dhaka 1213 Bangladesh Department of Electrical and Electronic Engineering University of Asia Pacific Dhaka 1215 Bangladesh Department of Electrical and Electronic Engineering University of Nottingham Malaysia Campus Semenyih 43500 Malaysia

This paper provides a technical analysis of energy harvesting (EH) in the field of power and energy sector, including different aspects of harvesting energy, individual case history, control strategies of harvesting in the field of power and energy sector together with the current trend and future aspects of it. EH is comparatively a new concept which is growing very fast since the 20th century and catching new generation research approaches. This paper not only describes the past and current scenarios of harvesting energy with radio frequency (RF) and renewables but also gives author’s own anticipation of the upcoming future trends of it by comparing the case histories.

关键词： Energy harvesting (EH) piezoelectric radio frequency (RF) solar triboelectric wind

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用微机确定直流电动机的瞬变特性

中小型电机 1990年第4期17卷 60-64页

作者： A.D.rajkumar R.SOmANATHAm 王友初

我们希望用微型计算机对下列瞬变特性进行测试:1.阶跃响应——电枢上加阶跃电压时的速度—时间特性;2.制动特性测试——电动机在稳态运行时突然关断电源后的速度—时间特性;3.制动特性测试时并联在电枢两端的动态制动电阻的影响;4.制动... 详细信息

我们希望用微型计算机对下列瞬变特性进行测试:1.阶跃响应——电枢上加阶跃电压时的速度—时间特性;2.制动特性测试——电动机在稳态运行时突然关断电源后的速度—时间特性;3.制动特性测试时并联在电枢两端的动态制动电阻的影响;4.制动特性测试中反电势 E_b的变化;5.在电机电枢上加一阶跃电压后位移与时间的关系。一、转换原则为了确定上述各特性。

关键词：直流电机微机瞬变特性测试