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Journal of Advanced Ceramics 2015年第1期4卷 22-30页

作者： Marikkannan SENTHIL KUMAR ayyasamy elaya perumal T.R.VIJAYARAM School of Mechanical Building and Sciences VIT UniversityChennai-600127Tamil Nadu StateIndia Department of Mechanical Engineering Anna UniversityChennai-600025Tamil Nadu StateIndia

The study of cordierite ceramic is the need of the hour in present technological world for various advanced engineering ***,which has relatively poor mechanical properties,has induced the use of various dopants to study the improvement in mechanical *** of seeking new materials with good mechanical properties has revived the research on ceria doped *** research conducted on pure cordierite and ceria doped cordierite ceramics has investigated the results of characterization and studied their *** cordierite and cordierite-ceria(CeO_(2))composite ceramics synthesized for various stoichiometric composition(5-20 wt%)were compacted at 240 MPa and sintered between 600℃and 1350℃for 3 *** characterization techniques used in this study were X-ray diffraction(XRD),thermogravimetric(TG)analysis and Fourier transform infrared(FTIR).The density was calculated using the Archimedes *** of the ceria addition on cordierite’s mechanical properties such as hardness,flexural strength and fracture toughness and on thermal properties as thermal expansion was *** results confirmed the presence of cordierite and ceria in the samples heat treated at 1350℃.Results of FTIR and TG analyses revealed the formation of cordierite and the effect of ceria *** mechanical properties studied were found to be encouraging and confirmed the suitability of cordierite-ceria as an alternate material for cordierite.

关键词： cordierite ceria(CeO_(2)) temperature phase transformation properties

Detection and defending the XSS attack using novel hybrid stacking ensemble learning-based DNN approach

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Digital Communications and Networks 2024年第3期10卷 716-727页

作者： Muralitharan Krishnan Yongdo Lim Seethalakshmi perumal Gayathri Palanisamy IMS Sungkyunkwan UniversitySuwon16419South Korea Department of Mathematics Sungkyunkwan UniversitySuwon16419South Korea Department of Information Technology Madras Institute of TechnologyChennaiIndia Department of Mathematics PSG College of Arts and ScienceTamilnaduIndia

Existing web-based security applications have failed in many situations due to the great intelligence of *** web applications,Cross-Site Scripting(XSS)is one of the dangerous assaults experienced while modifying an organization's or user's *** avoid these security challenges,this article proposes a novel,all-encompassing combination of machine learning(NB,SVM,k-NN)and deep learning(RNN,CNN,LSTM)frameworks for detecting and defending against XSS attacks with high accuracy and *** on the representation,a novel idea for merging stacking ensemble with web applications,termed“hybrid stacking”,is *** order to implement the aforementioned methods,four distinct datasets,each of which contains both safe and unsafe content,are *** hybrid detection method can adaptively identify the attacks from the URL,and the defense mechanism inherits the advantages of URL encoding with dictionary-based mapping to improve prediction accuracy,accelerate the training process,and effectively remove the unsafe JScript/JavaScript keywords from the *** simulation results show that the proposed hybrid model is more efficient than the existing detection *** produces more than 99.5%accurate XSS attack classification results(accuracy,precision,recall,f1_score,and Receiver Operating Characteristic(ROC))and is highly resistant to XSS *** order to ensure the security of the server's information,the proposed hybrid approach is demonstrated in a real-time environment.

关键词： Machine learning Deep neural networks Classification Stacking ensemble XSS attack URL encoding JScript/JavaScript Web security

A new strain-based pentagonal membrane finite element for solid mechanics problems

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Theoretical & Applied Mechanics Letters 2024年第3期14卷 211-216页

作者： Wei Hao Koh Logah perumal CheeKuang Kok Faculty of Engineering and Technology Multimedia UniversityMelaka 75450Malaysia

Polygonal finite elements remain an attractive option in finite element analysis due to their flexibility in modelingarbitrary shapes compared to *** this study,a pentagonal membrane element was developed with thestrain approach for the first *** element possesses invariance,and the equilibrium constraint was appliedto the assumed strain field using corrective *** by the advancing front technique,a pentagonalmesh was generated,and the mesh quality was enhanced with Laplacian *** performance of thedeveloped pentagonal element was assessed in a few numerical tests,and the results revealed its suitability inmodeling the bending of ***,the numerical results are enhanced when pentagonal elements are usedin mesh transitions along boundaries to smoothen curved edges and capture distributed loads.

关键词： Strain-based pentagonal element Corrective coefficients EquilibriumLaplacian smoothing Pentagonal mesh Mesh transition

Transcriptomic and pathological profiling of a new congenic mouse model with Lepr mutation:Evaluating susceptibility to the development of obesity and NAFLD

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Genes & Diseases 2024年第3期11卷 34-38页

作者： MJ Mahesh Kumar Shailendra Arindkar Masum Saini perumal Nagarajan National Institute of Immunology New Delhi 100067India Center for Cellular and Molecular Biology Hyderabad 500007India Regional Center for Biotechnology Faridabad 121001India

Non-alcoholic fatty liver disease(NAFLD)and type 2 diabetes mellitus(T2DM)are two disease conditions for which obesity is a risk factor.^(1)Due to the close relationship between the three pathologies,researchers frequently use the same mouse models to identify the underlying processes of obesity,NAFLD,and *** instance,leptin(Lep)-null(ob/ob)and leptin receptor(Lepr)-deficient(db/db)mice spontaneously develop NAFLD and show different phenotypes of extreme obesity and diabetes,respectively.

关键词： obesity NAFLD Lep

Maximizing Solar Potential Using the Differential Grey Wolf Algorithm for PV System Optimization

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Energy Engineering 2024年第8期121卷 2129-2142页

作者： Ezhilmathi Nagarathinam Buvana Devaraju Karthiyayini Jayamoorthy Padmavathi Radhakrishnan Santhana Lakshmi ChandraMohan Vijayakumar perumal Karthikeyan Balakrishnan Department of Electrical and Electronics Engineering Pandian Saraswathiyadav Engineering CollegeSivagangaiTamil Nadu630561India Department of Electrical and Electronics Engineering Sri Balaji Chockalingam Engineering CollegeArniTamil Nadu632317India Department of Information Science and Engineering New Horizon College of EngineeringBangalore560103India Department of Electrical and Electronics Engineering Rajalakshmi Engineering CollegeChennaiTamil Nadu602105India Department of Electrical and Electronics Engineering Sona College of TechnologySalemTamil Nadu636005India School of Electronics Engineering Vellore Institute of TechnologyChennaiTamil Nadu600127India Department of Electrical and Electronics Engineering Sri Krishna College of Engineering and TechnologyCoimbatoreTamil Nadu641008India

Maximum Power Point Tracking(MPPT)is crucial for maximizing the energy output of photovoltaic(PV)systems by continuously adjusting the operating point of the panels to track the point of maximum power production under changing environmental *** work proposes the design of an MPPT system for solar PV installations using the Differential Grey Wolf Optimizer(DGWO).It dynamically adjusts the parameters of the MPPT controller,specifically the duty cycle of the SEPIC converter,to efficiently track the Maximum Power Point(MPP).The proposed system aims to enhance the energy harvesting capability of solar PV systems by optimizing their performance under varying solar irradiance,temperature and shading *** results demonstrate the effectiveness of the DGWO-based MPPT system in maximizing the power output of solar PV installations compared to conventional MPPT *** research contributes to the development of advanced MPPT techniques for improving the efficiency and reliability of solar energy systems.

关键词： DGWO SEPIC converter MPPT PV module

Effect of Moringa oleifera on semen quality profiles in endangered Teressa goat under tropical humid island ecosystem

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Asian pacific Journal of Reproduction 2024年第2期13卷 89-96页

作者： P.perumal Jai Sunder A.K.De A.K.Nahak D.K.Chaurasia T.C.Balamurugan D.Bhattacharya ICAR-Central Island Agricultural Research Institute Port Blair-744105Andaman and Nicobar IslandsIndia OUAT-College of Veterinary Science and Animal Husbandry Bhubaneswar-751003OdishaIndia TANUVAS-Veterinary College and Research Institute Salem-636112Tamil NaduIndia

Objective:To investigate the effect of Moringa oleifera leaf extract on semen quality parameters in Teressa goat ***:A total of 25 semen samples from six bucks were selected for the *** of 150×10^(6) were incubated in 0,300,500 and 700μg of leaf extract as groupⅠ,Ⅱ,Ⅲ and Ⅳ,*** stored semen samples were analysed for motility,viability,total sperm abnormalities,plasma membrane,acrosomal and nuclear integrities,seminal plasma intracellular enzymes[aspartate aminotransferase(AST),alanine aminotransferase(ALT)and lactate dehydrogenase(LDH)]and total antioxidant capacity(TAC)and spermatozoa malondialdehyde(MDA)and cholesterol efflux in comparison with the control group(groupⅠ)for up to 72 ***:Moringa oleifera leaf extract(500μg/150×10^(6) spermatozoa)-treated semen had significantly higher motility,viability,plasma membrane,acrosomal and nuclear integrities,and TAC(P<0.05),and had significantly lower total sperm abnormalities,AST,ALT,LDH,MDA production and cholesterol efflux compared to those in other Moringa oleifera leaf extract treated(300 or 700μg/150×10^(6) spermatozoa)and control groups at different hours of liquid storage(P<0.05).Semen quality parameters and TAC showed an increasing trend and total sperm abnormalities,MDA production,leakage of intra-cellular enzymes and cholesterol efflux showed a decreasing trend from group Ⅰto group Ⅲand then an opposite trend from group Ⅲ to group Ⅳ at different hours of liquid ***:Moringa oleifera leaf extract 500μg/150×10^(6) spermatozoa can be used for liquid semen preservation in Teressa goat at Andaman and Nicobar Islands.

关键词： Moringa oleifera Semen Teressa goat Andaman and Nicobar Islands

Dry Sliding Wear Behavior of Ti6Al4V and TaN against TiN Deposited Steel Surface

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Journal of Materials Science and Chemical Engineering 2015年第7期3卷 202-207页

作者： A. elaya perumal I. Saravanan Department of Mechanical Engineering CEG Anna University Chennai India

The objective of this research is to study the dry sliding wear behaviour of metal surfaces and influences of their surface hardness. The improved hardness of the TiN deposited surface was about 1763 Hv. The worn surface Scanning Electron Microscope (SEM) morphology exhibits the surface damage due to varying wear test parameters. The Electron Dispersive Spectroscopy (EDS) reveals that the material transfer between the counter parts and the wear mechanism has been involved. The minimum specific wear rate of TiN surface was 0.0018 mg/Nm and 0.0026 mg/Nm against Ti6Al4V alloy and TaN respectively.

关键词： TiN Ti6Al4V Dry Sliding Wear TaN

BLEND MEMBRANES FOR DIRECT METHANOL AND PROTON EXCHANGE MEMBRANE FUEL CELLS

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Chinese Journal of Polymer Science 2012年第4期30卷 548-560页

作者： perumal Bhavani Dharmalingam Sangeetha Department of Chemistry Anna UniversityChennai 25India

Sulphonated polystyrene ethylene butylene polystyrene （SPSEBS） prepared with 35% sulphonation was found to be highly elastic and enlarged up to 300%-400% of its initial length. It absorbed over 110% of water by weight. A major drawback of this membrane is its poor mechanical properties which are not adequate for use as polymer electrolytes in fuel cells. To overcome this, SPSEBS was blended with poly（vinylidene fluoride）（PVDF）, a hydrophobic polymer. The blend membranes showed better mechanical properties than the base polymer. The effect of PVDF content on water uptake, ion exchange capacity and proton conductivity of the blend membranes was investigated. This paper presents the results of recent studies applied to develop an optimized in-house membrane electrode assembly （MEA） preparation technique combining catalyst ink spraying and assembly hot pressing. Easy steps were chosen in this preparation technique in order to simplify the method, aiming at cost reduction. The open circuit voltage for the cell with SPSEBS is 0.980 V which is higher compared to that of the cell with Nation 117 （0.790 V）. From this study, it is concluded that a polymer electrolyte membrane suitable for proton exchange membrane fuel cell （PEMFC） and direct methanol fuel cell （DMFC） application can be obtained by blending SPSEBS and PVDF in appropriate proportions. The methanol permeability and selectivity showed a strong influence on DMFC performance.

关键词： Fuel cell Impedance Polymer blend Proton conductivity.

Document Clustering Using Graph Based Fuzzy Association Rule Generation

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Computer Systems Science & Engineering 2022年第10期43卷 203-218页

作者： P.perumal Department of Computer Science and Engineering Sri Ramakrishna Engineering CollegeCoimbatoreIndia

With the wider growth of web-based documents,the necessity of automatic document clustering and text summarization is ***,document summarization that is extracting the essential task with appropriate information,removal of unnecessary data and providing the data in a cohesive and coherent manner is determined to be a most confronting *** this research,a novel intelligent model for document clustering is designed with graph model and Fuzzy based association rule generation(gFAR).Initially,the graph model is used to map the relationship among the data(multi-source)followed by the establishment of document clustering with the generation of association rule using the fuzzy *** method shows benefit in redundancy elimination by mapping the relevant document using graph model and reduces the time consumption and improves the accuracy using the association rule generation with *** framework is provided in an interpretable way for document *** iteratively reduces the error rate during relationship mapping among the data(clusters)with the assistance of weighted document ***,this model represents the significance of data features with class *** is also helpful in measuring the significance of the features during the data clustering *** simulation is done with MATLAB 2016b environment and evaluated with the empirical standards like Relative Risk Patterns(RRP),ROUGE score,and Discrimination Information Measure(DMI)***,DailyMail and DUC 2004 dataset is used to extract the empirical *** proposed gFAR model gives better trade-off while compared with various prevailing approaches.

关键词： Document clustering text summarization fuzzy model association rule generation graph model relevance mapping feature patterns

Safety of motorised two wheelers in mixed traffic conditions:Literature review of risk factors

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Journal of Traffic and Transportation Engineering(English Edition) 2021年第1期8卷 35-56页

作者： Jaikishan Damani perumal Vedagiri Department of Civil Engineering Indian Institute of Technology BombayMumbai 400076India

The ownership of motorised two wheelers(MTWs)has been on the rise across various countries across the *** growth has been especially higher in developing countries which have typical traffic characteristics and higher *** steady rise has resulted in increased accident and *** abrupt increase warranted attention from the researchers to carry out specific studies for MTWs,which have a very different behaviour as compared to cars in terms of physical and dynamic ***,the unique traffic patterns usually found in the developing countries pose an additional challenge to the researchers,since the conventional focus of transportation safety researchers was a homogeneous car-based *** such studies have been attempted,especially in the recent decades,which have considered various risk factors related to MTW ***,the studies have considered different sets of risk factors and have given surprising and even conflicting ***,a comprehensive review of the diverse studies needs to be carried out which incorporates all the risk factors considered in previous *** study reviews such research papers which have analysed various risk factors related to safety of MTWs,especially in heterogeneous,non-lane based ***,this paper aims to incorporate results from those studies and highlight the conclusions from state of the *** paper also discusses about the research gaps that are crucial for MTW safety in mixed traffic *** review will be useful for researchers working in the field of MTW safety and for policy implementation and analysis.

关键词： Traffic safety Motorised two wheelers Risk factors Driver behaviour Mixed traffic Non-lane based