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Frequency regularization of a linked wind- diesel system using dual structure fuzzy with ultra-capacitor

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Protection and Control of Modern Power Systems 2022年第1期7卷 165-173页

作者： Gulshan Sharma k.narayanan T.Adefarati Sachin Sharma Department of Electrical Engineering Technology University of JohannesburgJohannesburg 2006South Africa Department of Electrical and Elec-tronics Engineering SASTRA DEEMED UNIVERSITYThanjavurIndia Department of Electrical and Electronic Engineering Federal University Oye EkitiOye EkitiNigeria Department of Electrical Engineering Graphic Era(Deemed to be University)DehradunIndia

Microgrids(μ-grids)are gaining increased interest around the world for supplying cheap and clean *** this paper,aμ-grid comprising a wind turbine generator(WTG)and diesel generator(DG)is *** is one of most practical and demanding systems suitable for the present energy crisis in isolated or rural ***,wind energy is intermittent in nature while load demand changes ***,aμ-grid can experience large frequency and power *** speed governor of the DG tries to minimize the frequency and power deviations inμ-grid though its operation is slow and cannot adequately minimize system *** paper proposes a novel arrangement based on a dual structured fuzzy(DSF)whose structure changes according to the switching limit with a reduced rule *** has the capability to switch between proportional and integral actions and hence improves the frequency regularization of theμ-*** proposed strategy is tested in aμ-grid and the results considering step load alteration,load alteration at different instants of time,nonstop changing load request are compared with some of the well published methods to validate the effectiveness and simplicity of the present *** addition,it shows that ultra-capacitor establishment in aμ-grid has a positive impact in minimizing system deviations with DSF for the studied cases.

关键词： Microgrid Wind generation Diesel generation Frequency control Dual mode fuzzy

Multifunctional applications of gadolinium-doped cerium oxide(Ce_(1-x)Gd_(x)O_(2-■))ceramics:A review

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Journal of Rare Earths 2024年第10期42卷 1817-1834页

作者： Subhadip Das Rakesh Bhaskar kannan Badri narayanan Department of Ceramic Engineering National Institute of Technology RourkelaOdisha769008India School of Chemical Engineering Yeungnam University280 Daehak-Ro Gyeongsan Gyngbuk38541Republic of Korea

Cerium oxide(CeO_(2)),or ceria,and its doped derivatives have been extensively studied for several decades and are well-known oxides valued for their unique structural properties and wide range of *** materials play a crucial role in sustainable development within *** modification through de fect e ngineering of the highly stable cubic fluorite phase enhances the versatility of this doped ceria to a new *** the numerous dopants of the CeO_(2)matrix,ceria doped with gadolinium(Gd),known as Ce_(1-x)Gd_(x)O_(2-■)(CGO),is gaining popularity due to its *** introduction of defect-induced vacancies in the oxygen sublattice(V_(o))and a change in the average valence of cerium(Ce^(3+)/Ce^(4+))are primarily responsible for the improved performance compared to pristine CeO_(2).These materials are currently undergoing intensive research for potential use as electrolytes in intermediate-temperature solid oxide fuel cells(IT-SOFCs)and dense oxygen-permeable membranes(OPMs).Additionally,they are being commercially utilized for power generation and oxygen *** materials are also attracting significant attention in various fields such as optics,photocatalysis,electrostriction,spintronics,gas sensing,electrocatalysis,and biomedical *** review paper aims to compile the latest contributions to CGO materials and comprehensively cover their various application *** crystal structure,defect equilibrium in Gd^(3+)-doped CeO_(2),the origin of multifunctionality,and the prospects of these materials are also exclusively discussed.

关键词： Gadolinium-doped CeO_(2) Rare earths Photo/electrocatalysts Gas sensors Spintronics Biomedicine

Towards sustainable solar cells:unveiling the latest developments in bio-nano materials for enhanced DSSC efficiency

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Clean Energy 2024年第3期8卷 238-257页

作者： Sethu narayanan Tamilselvan S.Shanmugan Research Centre for Solar Energy Department of Engineering PhysicsCollege of EngineeringKoneru Lakshmaiah Education FoundationGreen FieldsGuntur DistrictVaddeswaramAndhra Pradesh 522502India

Fossil fuels-instrumental in powering the nineteenth-century Industrial Revolution-are now under heightened scrutiny due to environmental concerns and carbon ***,there is a global impetus towards achieving carbon-neutral energy production,with solar energy emerging as a cornerstone in this *** the past three decades,dye-sensitized solar cells(DSSCs)have gained increasing prominence due to their unique *** review elucidates several crucial elements essential to DSSC construction,notably bio-nano materials,prized for their structural flexibility,cost-effectiveness and high molar absorption *** delves into the intricate relationship between molecular structure and DSSC performance,showcasing significant advancements with light-to-power conversion efficiencies reaching 11%.A comprehensive analysis of the photovoltaic performance of DSSCs utilizing bio-nano-based dyes offers invaluable insights into the state of this rapidly evolving *** components under scrutiny include transparent conductive oxide(TCO)layers,physical techniques for metal oxide deposition onto TCO thin films,diverse dye variants and foundational knowledge of components ripe for growth and ***,the review outlines the latest breakthroughs in the field,providing glimpses into the current status of prototype DSSCs.

关键词： DSSC performance TCO thin films environmental solution

Role of intravascular ultrasound and optical coherence tomography in intracoronary imaging for coronary artery disease:a systematic review

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Journal of Geriatric Cardiology 2024年第1期21卷 104-129页

作者： Maruf Sarwar Stephen Adedokun Mahesh Anantha narayanan Department of Cardiovascular Sciences White River HealthBatesvilleARUSA Division of Cardiology University of Tennessee at MemphisTNUSA University of Arkansas Medical Sciences Little RockARUSA

Coronary angiography has long been the standard for coronary imaging,but it has limitations in assessing vessel wall anatomy and guiding percutaneous coronary intervention(PCI).Intracoronary imaging techniques like intravascular ultrasound(IVUS)and optical coherence tomography(OCT)can overcome these *** uses ultrasound and OCT uses near-infrared light to visualize coronary pathology in unique ways due to differences in temporal and spatial *** techniques have evolved to offer clinical utility in plaque characterization and vessel assessment during ***-analyses and adjusted observational studies suggest that both IVUS and OCT-guided PCI correlate with reduced cardiovascular risks compared to angiographic guidance *** IVUS demonstrates consistent clinical outcome benefits,OCT evidence is less *** has progressed from early motion detection to high-resolution systems,with smaller compatible *** utilizes near infrared light to achieve unparalleled resolutions,but requires temporary blood clearance for optimal *** visualization and guidance make IVUS and OCT well-suited for higher risk PCI in patients with diabetes and chronic kidney disease by allowing detailed visualization of complex lesions and ensuring optimal stent deployment and positioning in PCI for patients with type 2 diabetes and chronic kidney disease,improving *** and recent advancements in zero-and low-contrast OCT techniques can reduce nephrotoxic contrast exposure,thus helping to minimize PCI complications in these high-risk patient *** and OCT provide valuable insights into coronary pathophysiology and guide interventions precisely compared to angiography *** have comparable clinical outcomes,emphasizing the need for tailored imaging choices based on clinical *** refinement and integration of intravascular imaging will likely play a pivotal role in optimizing coronary interventions and outcomes.

关键词： coronary anatomy limitations

Crosstalk between Wnt and bone morphogenetic protein signaling during osteogenic differentiati

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World Journal of Stem Cells 2024年第2期16卷 102-113页

作者： Pakkath narayanan Arya Iyyappan Saranya Nagarajan Selvamurugan Department of Biotechnology School of BioengineeringSRM Institute of Science and TechnologyKattankulathur 603203India

Mesenchymal stem cells(MSCs)originate from many sources,including the bone marrow and adipose tissue,and differentiate into various cell types,such as osteoblasts and *** studies on MSCs have revealed that many transcription factors and signaling pathways control osteogenic *** is the process by which new bones are formed;it also aids in bone ***/β-catenin and bone morphogenetic protein(BMP)signaling pathways are involved in many cellular processes and considered to be essential for ***/β-catenin and BMPs are important for bone formation in mammalian development and various regulatory activities in the *** studies have indicated that these two signaling pathways contribute to osteogenic *** Wnt signaling pathway promotes osteogenesis by activating the downstream targets of the BMP signaling ***,we briefly review the molecular processes underlying the crosstalk between these two pathways and explain their participation in osteogenic differentiation,emphasizing the canonical *** review also discusses the crosstalk mechanisms of Wnt/BMP signaling with Notch-and extracellular-regulated kinases in osteogenic differentiation and bone development.

关键词： Bone Mesenchymal stem cells Osteogenic differentiation Wnt/β-catenin Bone morphogenetic proteins

Exploring Deep Learning Methods for Computer Vision Applications across Multiple Sectors:Challenges and Future Trends

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Computer Modeling in Engineering & Sciences 2024年第4期139卷 103-141页

作者： narayanan Ganesh Rajendran Shankar Miroslav Mahdal Janakiraman SenthilMurugan Jasgurpreet Singh Chohan kanak kalita School of Computer Science and Engineering Vellore Institute of TechnologyChennai600127India Department of Computer Science and Engineering Koneru Lakshmaiah Education FoundationVaddeswaram522502India Department of Control Systems and Instrumentation Faculty of Mechanical EngineeringVSB-Technical University of OstravaOstrava70800Czech Republic Department of Computer Science and Engineering Vel Tech High Tech Dr.Rangarajan Dr.Sakunthala Engineering CollegeChennai600062India Department of Mechanical Engineering and University Centre for Research&Development Chandigarh UniversityMohali140413India Department of Mechanical Engineering Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and TechnologyAvadi600062India

Computer vision(CV)was developed for computers and other systems to act or make recommendations based on visual inputs,such as digital photos,movies,and other *** learning(DL)methods are more successful than other traditional machine learning(ML)methods *** techniques can produce state-of-the-art results for difficult CV problems like picture categorization,object detection,and face *** this review,a structured discussion on the history,methods,and applications of DL methods to CV problems is *** sector-wise presentation of applications in this papermay be particularly useful for researchers in niche fields who have limited or introductory knowledge of DL methods and *** review will provide readers with context and examples of how these techniques can be applied to specific areas.A curated list of popular datasets and a brief description of them are also included for the benefit of readers.

关键词： Neural network machine vision classification object detection deep learning

A new perspective on intervertebral disc calcification—from bench to bedside

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Bone Research 2024年第1期12卷 50-61页

作者： Emanuel J.Novais Rajkishen narayanan Jose A.Canseco koen van de Wetering Christopher k.kepler Alan S.Hilibrand Alexander R.Vaccaro Makarand V.Risbud Department of Orthopaedic Surgery Sidney Kimmel Medical CollegeThomas Jefferson UniversityPhiladelphiaPAUSA Unidade Local de Saúde do Litoral Alentejano Orthopedic DepartmentSantiago do CacémPortugal Rothman Orthopedic Institute at Thomas Jefferson University PhiladelphiaPAUSA

Disc degeneration primarily contributes to chronic low back and neck ***,there is an urgent need to understand the spectrum of disc degeneration phenotypes such as fibrosis,ectopic calcification,herniation,or mixed *** these phenotypes,disc calcification is the least *** calcification,by definition,is the pathological mineralization of soft tissues,widely studied in the context of conditions that afflict vasculature,skin,and ***,disc calcification is associated with poor surgical outcomes and back pain refractory to conservative *** is frequently seen as a consequence of disc aging and progressive degeneration but exhibits unique molecular and morphological characteristics:hypertrophic chondrocyte-like cell differentiation;TNAP,ENPP1,and ANk upregulation;cell death;altered Pi and PPi homeostasis;and local *** studies in mouse models have provided a better understanding of the mechanisms underlying this *** is essential to recognize that the presentation and nature of mineralization differ between AF,NP,and EP ***,the combination of anatomic location,genetics,and environmental stressors,such as aging or trauma,govern the predisposition to ***,the systemic regulation of calcium and Pi metabolism is less important than the local activity of PPi modulated by the ANk-ENPP1 axis,along with disc cell death and differentiation *** there is limited understanding of this phenotype,understanding the molecular pathways governing local intervertebral disc calcification may lead to developing disease-modifying drugs and better clinical management of degeneration-related pathologies.

关键词： degeneration metabolism intervertebral

Understanding female urinary continencedlessons from complications of female urethral surgery

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Asian Journal of Urology 2024年第3期11卷 504-506页

作者： Sidhartha kalra Atanu kumar Pal Lalgudi narayanan Dorairajan Department of Urology and Renal Transplantation Jawaharlal Institute of Post Graduate Medical Education and ResearchPuducherryIndia

Dear Editor,We share our experience of two significant complications associated with female urethroplasty and their management in understanding the factors contributing to urinary *** have also tried to assess the different components of female urinary continence mechanism and the ways to combat the postoperative urinary continence while performing female urethral surgeries(Fig.1).Informed consent was taken from each of the patients before their evaluation and *** were explained properly and informed consents were taken from them before the publication of this article.

关键词： urinary female urethral

Exploring the impact of high density planting system and deficit irrigation in cotton(Gossypium hirsutum L.):a comprehensive review

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Journal of Cotton Research 2024年第3期7卷 302-317页

作者： MANIBHARATHI Sekar SOMASUNDARAM Selvaraj PARASURAMAN Panneerselvam SUBRAMANIAN Alagesan RAVICHANDRAN Veerasamy MANIkANDA BOOPATHI narayanan Department of Agronomy Tamil Nadu Agricultural UniversityCoimbatoreTamil Nadu 641003India Cotton Research Station Tamil Nadu Agricultural UniversityPerambalurTamil Nadu621116India Department of Cotton Tamil Nadu Agricultural UniversityCoimbatoreTamil Nadu 641003India Department of Crop Physiology Tamil Nadu Agricultural UniversityCoimbatoreTamil Nadu 641003India Department of Plant Biotechnology Centre for Plant Molecular Biology and BiotechnologyTamil Nadu Agricultural UniversityCoimbatoreTamil Nadu 641003India

Lessons learned from past experiences push for an alternate way of crop *** India,adopting high density planting system(HDPS)to boost cotton yield is becoming a growing *** has recently been considered a replacement for the current Indian production *** is also suitable for mechanical harvesting,which reducing labour costs,increasing input use efficiency,timely harvesting timely,maintaining cotton quality,and offering the potential to increase productivity and *** technology has become widespread in globally cotton growing *** management is critical for the success of high density cotton *** to the problem of freshwater availability,more crops should be produced per drop of *** the high-density planting system,optimum water application is essential to control excessive vegetative growth and improve the translocation of photoassimilates to reproductive *** irrigation is a tool to save water without compromising *** the same time,it consumes less water than the normal evapotranspiration of *** review comprehensively documents the importance of growing cotton under a high-density planting system with deficit *** on the current research and combined with cotton production reality,this review discusses the application and future development of deficit irrigation,which may provide theoretical guidance for the sustainable advancement of cotton planting systems.

关键词： Deficit irrigation High density planting system Ultra narrow row Cost saving Mechanical harvesting Yield optimization