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Enhanced Perturb and Observe Control Algorithm for a Standalone Domestic Renewable Energy System

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Intelligent Automation & Soft Computing 2023年第8期37卷 2291-2306页

作者： N.Kanagaraj Obaid martha Aldosary m.Ramasamy m.vijayakumar Electrical Engineering Department College of Engineering in Wadi Al-dawasirPrince Sattam Bin Abdulaziz UniversityWadi Al-dawasir11991Saudi Arabia Department of Electrical and Electronics Engineering K.S.R.College of EngineeringTiruchengode637215India

The generation of electricity,considering environmental and eco-nomic factors is one of the most important challenges of recent *** this article,a thermoelectric generator(TEG)is proposed to use the thermal energy of an electric water heater(EWH)to generate electricity *** improve the energy conversion efficiency of the TEG,a fuzzy logic con-troller(FLC)-based perturb&observe(P&O)type maximum power point tracking(mPPT)control algorithm is used in this *** EWH is one of the major electricity consuming household appliances which causes a higher electricity price for ***,a significant amount of thermal energy generated by EWH is wasted every day,especially during the winter *** recent years,TEGs have been widely developed to convert surplus or unused thermal energy into usable *** this context,the proposed model is designed to use the thermal energy stored in the EWH to generate *** addition,the generated electricity can be easily stored in a battery storage system to supply electricity to various household appliances with *** proposed mPPT control algorithm helps the system to quickly reach the optimal point corresponding to the maximum power output and maintains the system operating point at the maximum power output *** validate the usefulness of the proposed scheme,a study model was developed in the mATLAB Simulink environment and its performance was investigated by simulation under steady state and transient *** results of the study confirmed that the system is capable of generating adequate power from the available thermal energy of *** was also found that the output power and efficiency of the system can be improved by maintaining a higher temperature difference at the input terminals of the ***,the real-time temperature data of Abha city in Saudi Arabia is considered to analyze the feasibility of the proposed system for practical implementation.

关键词： Perturb and observe control algorithm fuzzy logic controller energy conversion efficiency maximum power point tracking thermoelectric generator

Covalently Bonded Ni Sites in Black Phosphorene with Electron Redistribution for Efficient metal‑Lightweighted Water Electrolysis

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Nano-micro Letters 2024年第6期16卷 233-245页

作者： Wenfang Zhai Ya Chen Yaoda Liu Yuanyuan ma Paranthaman vijayakumar Yuanbin Qin Yongquan Qu Zhengfei Dai State Key Laboratory for mechanical Behavior of materials Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China SSN Research Centre SSN College of EngineeringChennaiTamil Nadu 603110India

The metal-lightweighted electrocatalysts for water splitting are highly desired for sustainable and economic hydrogen energy deployments,but *** this work,a low-content Ni-functionalized approach triggers the high capability of black phosphorene(BP)with hydrogen and oxygen evolution reaction(HER/OER)*** a facile in situ electro-exfoliation route,the ionized Ni sites are covalently functionalized in BP nanosheets with electron redistribution and controllable metal *** is found that the as-fabricated Ni-BP electrocatalysts can drive the water splitting with much enhanced HER and OER *** 1.0 m KOH electrolyte,the optimized 1.5 wt%Nifunctionalized BP nanosheets have readily achieved low overpotentials of 136 mV for HER and 230 mV for OER at 10 mA cm^(−2).moreover,the covalently bonding between Ni and P has also strengthened the catalytic stability of the Ni-functionalized BP electrocatalyst,stably delivering the overall water splitting for 50 h at 20 mA cm^(−2).Theoretical calculations have revealed that Ni–P covalent binding can regulate the electronic structure and optimize the reaction energy barrier to improve the catalytic activity *** work confirms that Ni-functionalized BP is a suitable candidate for electrocatalytic overall water splitting,and provides effective strategies for constructing metal-lightweighted economic electrocatalysts.

关键词： Black phosphorus Water electrolysis Electrocatalyst Electron redistribution Covalent functionalization

Intelligent Financial Fraud Detection Using Artificial Bee Colony Optimization Based Recurrent Neural Network

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Intelligent Automation & Soft Computing 2023年第8期37卷 1483-1498页

作者： T.Karthikeyan m.Govindarajan V.vijayakumar Department of Computer Science and Engineering Annamalai UniversityAnnamalai NagarTamil NaduIndia Department of Computer Science and Engineering Sri Manakula Vinayagar Engineering CollegePuducherryIndia

Frauds don’t follow any recurring *** require the use of unsupervised learning since their behaviour is continually ***-sters have access to the most recent technology,which gives them the ability to defraud people through online *** make assumptions about consumers’routine behaviour,and fraud develops *** learning must be used by fraud detection systems to recognize online payments since some fraudsters start out using online channels before moving on to other *** a deep convolutional neural network model to identify anomalies from conventional competitive swarm optimization pat-terns with a focus on fraud situations that cannot be identified using historical data or supervised learning is the aim of this paper Artificial Bee Colony(ABC).Using real-time data and other datasets that are readily available,the ABC-Recurrent Neural Network(RNN)categorizes fraud behaviour and compares it to the current *** compared to the current approach,the findings demonstrate that the accuracy is high and the training error is minimal in ABC_*** this paper,we measure the Accuracy,F1 score,mean Square Error(mSE)and mean Absolute Error(mAE).Our system achieves 97%accuracy,92%precision rate and F1 score 97%.Also we compare the simulation results with existing methods.

关键词： Fraud activity optimization deep learning classification online transaction neural network credit card

Optimization of Process Parameters for Injection moulding of Nylon6/SiC and Nylon6/B_(4)C Polymer matrix Composites

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Fluid Dynamics & materials Processing 2022年第2期18卷 223-232页

作者： G.Boopathy K.Gurusami m.Chinnapandian K.R.vijayakumar St.Peter’s Institute of Higher Education and Research Chennai600054India Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology Chennai600062India St.Peter’s College of Engineering and Technology Chennai600054India mGR Educational and Research Institute Chennai600095India

In this research study,the mechanical properties of several Polymer matrix composites are *** composites are multi-phase materials in which reinforcing materials are properly mixed with a polymer *** precisely,Nylon 6 reinforced with 5,15 and 25 wt.%of silicon carbide(SiC)and Nylon 6 reinforced with 5,15 and 25 wt.%of boron carbide(B_(4)C),prepared by means of an injection moulding process at three different injection pressures are *** attention is paid to the tensile and impact strength of these *** Taguchi technique is used to optimize the process parameters such as reinforcement material,its percentage and the injection *** is observed that the specimens 5%SiC with 80 mPa injection pressure display a better tensile strength and similarly the specimen 5%B_(4)C with 90 mPa injection pressure have a superior impact strength.

关键词： PmCs Nylon 6 injection moulding Taguchi technique ANOVA

Cyanobacterial metabolites as novel drug candidates in corona viral therapies:A review

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Chronic Diseases and Translational medicine 2022年第3期8卷 172-183页

作者： Srinivasan Prabhu Subramaniyan vijayakumar Pabakaran Praseetha Department of Botany Annai Vailankanni Arts and Science CollegeThanjavurTamil NaduIndia Deparment of Botany A.V.V.M Sri Pushpam CollegePoondi(Affiliated to Bharathidasan University)ThanjavurTamil NaduIndi Department of Nnotechnology Noorul Islam Cenire for Higher EducationKumaracolTamil NaduIndia

most of the medical and nonmedical research labs,all around the world,are racing against time to produce an effective vaccine or an antiviral medicine for coronavirus disease 2019(COVID-19).Conventional medicines and novel nano-materials including chemical and herbal-based compounds are all into positive trials toward coronaviruses and other pandemic *** them,natural immune boosters have attracted physicians because of their longevity and reliability for fewer side *** is a review article with a detailed picture of an unexplored antiviral source with maximum potency in curing viral *** have been known for centuries and are rich in secondary metabolites of proteins,biopeptides,and polysaccharides for prominent antiviral action against chest *** detailed exploratory research is required to purify,scale-up,and commercialize the pharmacologically active agents from these drug reserves.

关键词： antiviral drugs coronavirus covid-19 cyanobacteria

Double-Blockchain Assisted Secure and Anonymous Data Aggregation for Fog-Enabled Smart Grid

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Engineering 2022年第1期8卷 159-169页

作者： Siguang Chen Li Yang Chuanxin Zhao vijayakumar Varadarajan Kun Wang Jiangsu Key Lab of Broadband Wireless Communication and Internet of Things Nanjing University of Posts and TelecommunicationsNanjing 210003China Jiangsu Engineering Research Center of Communication and Network Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China Anhui Provincial Key Laboratory of Network and Information Security Anhui Normal UniversityWuhu 241000China School of Computer Science and Engineering Vellore Institute of TechnologyChennai 600127India Department of Electrical and Computer Engineering University of CaliforniaLos AngelesCA 90095USA

As a future energy system,the smart grid is designed to improve the efficiency of traditional power systems while providing more stable and reliable ***,this efficient and reliable service relies on collecting and analyzing users’electricity consumption data frequently,which induces various security and privacy *** address these challenges,we propose a double-blockchain assisted secure and anonymous data aggregation scheme for fog-enabled smart grid named ***,we design a three-tier architecture-based data aggregation framework by integrating fog computing and the blockchain,which provides strong support for achieving efficient and secure data collection in smart ***,we develop a secure and anonymous data aggregation mechanism with low computational overhead by jointly leveraging the Paillier encryption,batch aggregation signature and anonymous *** particular,the system achieves fine-grained data aggregation and provides effective support for power dispatching and price adjustment by the designed double-blockchain and two-level data ***,the superiority of the proposed scheme is illustrated by a series of security and computation cost analyses.

关键词： Blockchain Fog computing Homomorphic encryption Smart grid Anonymity

Shining Light on Anion-mixed Nanocatalysts for Efficient Water Electrolysis: Fundamentals, Progress, and Perspectives

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Nano-micro Letters 2022年第3期14卷 79-119页

作者： Yaoda Liu Paranthaman vijayakumar Qianyi Liu Thangavel Sakthivel Fuyi Chen Zhengfei Dai State Key Laboratory for mechanical Behavior of materials Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China

Hydrogen with high energy density and zero carbon emission is widely acknowledged as the most promising candidate toward world’s carbon neutrality and future sustainable ***-splitting is a constructive technology for unpolluted and high-purity H2 production,and a series of non-precious electrocatalysts have been developed over the past *** further improve the catalytic activities,metal doping is always adopted to modulate the 3d-electronic configuration and electron-donating/accepting(e-DA)properties,while for anion doping,the electronegativity variations among different non-metal elements would also bring some potential in the modulations of e-DA and metal valence for tuning the *** this review,we summarize the recent developments of the many different anion-mixed transition metal compounds(e.g.,nitrides,halides,phosphides,chalcogenides,oxyhydroxides,and borides/borates)for efficient water electrolysis ***,we have introduced the general information of water-splitting and the description of anion-mixed electrocatalysts and highlighted their complementary functions of mixed ***,some latest advances of anion-mixed compounds are also categorized for hydrogen and oxygen evolution *** rationales behind their enhanced electrochemical performances are *** but not least,the challenges and future perspectives are briefly proposed for the anion-mixed water dissociation catalysts.

关键词： multianions Electrocatalysts Water electrolysis Hydrogen energy Oxygen evolution

PV based water pumping system for agricultural irrigation

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Frontiers in Energy 2016年第3期10卷 319-328页

作者： T A BINSHAD K vijayakumar m KALEESWARI Department of Electrical Engineering Malaviya National Institute of Technology Jaipur 302017 India Department of Electrical Engineering Poomima University Jaipur302017 India

This paper investigates the operation and analysis of the photovoltaic water pumping system in detail. Power electronic controllers were designed and developed for the water pumping system using a boost converter along with an inverter followed by an induction motor pump set. The proposed system could be employed in agricultural irrigation under any operating condition of varying natures of solar irradiances and temperatures. The configuration and implementation of the system were described in detail. Further, the detailed method of analysis and simulation characteristics of such PV water pumping system was also presented. With the concern of shortage of fossil fuel, global warming and energy security, the proposed PV based water pumping significant demand of electricity agricultural sector. system can meet the and serve for the

关键词： photovoltaic water pumping system power electronic controller solar irradiances and temperature

Effect of Flow Field Geometry on Hydrodynamics of Flow in Redox Flow Battery

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Energy Engineering 2022年第1期119卷 201-217页

作者： m.Narendra Kumar S.manoj Kumar G.C.vijayakumar K.Kadirgama m.Samykano Krishna Venkatesh H.B.murlidhara Center for Incubation Innovation Research and Consultancy(CIIRC)Jyothy Institute of TechnologyBangalore560082KarnatakaIndia Department of mechanical Engineering Jyothy Institute of TechnologyBangalore560082KarnatakaIndia Faculty of mechanical and Automotive Engineering Technology University Malaysia PahangPahang26600Malaysia Centre for Automotive Engineering Universiti Malaysia PahangPahang26600Malaysia College of Engineering Universiti Malaysia PahangPahang26600Malaysia

This study computationally investigates the hydrodynamics of different serpentine flow field designs for redox flow batteries,which considers the Poiseuille flow in the flow channel and the Darcy flow porous *** Fluid Dynamics(CFD)results of the in-house developed code based on Finite Volume method(FVm)for conventional serpentine flow field(CSFF)agreed well with those obtained via *** deviation for pressure drop(ΔP)was less than 5.1%for all the flow rates,thus proving the present CFD analysis’s validity on the modified variation of serpentine flow *** serpentine flow field-2(mSFF2)design provided least pressure drop across the channel and maximum velocity penetration across the porous substrate when compared to the other *** increases its wetting ability,which is very important in terms of mass transfer over potential for electrochemical reaction happening in the porous substrate to achieve effective electrochemical cell performance.

关键词： Pressure drop velocity distribution serpentine flow field porous substrate redox flow battery