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Unsuperv.sed intrusion detection system for in-v.hicle communication networks

Journal of Safety Science and resilience 2024年第2期5卷 119-129页

作者： Kabilan N v.nayakum.r ravi v.Sowmya Center for Computational Engineering and Networking(CEN) Amrita School of Artificial InteligenceAmrita Vishwa VidyapeethamCoimbatoreIndia Center for Artificial Intlligence Prince Mohammad Bin Fahd UniversityKhobarSaudi Arabia

In-v.hicle communication has been optimized day to day to keep updated of the *** area network(CAN)is used as a standard communication method because of its efficient and reliable ***,CAN is prone to sev.ral network lev.l attacks because of its lack in security *** methods hav. been introduced to incorporate this in *** proposed an unsuperv.sed method of intrusion detection for in-v.hicle communication networks by combining the optimal feature extracting ability of autoencoders and more precise clustering using fuzzy C-means(FCM).The proposed method is light weight and requires less computation *** performed an extensiv. experiment and achiev.d an accuracy of 75.51%with the ML35o in-v.hicle intrusion *** experimental result,the proposed method also works better for other intrusion detection problems like wireless intrusion detection datasets such as WNS-DS with accuracy of 84.05%and network intrusion detection datasets such as KDDCup with accuracy 60.63%,UNSW_NB15 with accuracy 73.62%and Information Security Center of Excellence(Iscx)with accuracy 74.83%.Ov.rall,the proposed method outperforms the existing methods and av.ids labeled datasets when training an in-v.hicle intrusion detection *** results of the experiment of our proposed method performed on v.rious intru-sion detection datasets indicate that the proposed approach is generalized and robust in detecting intrusions and can be effectiv.ly deployed in real time to monitor CAN traffic in v.hicles and proactiv.ly alert during attacks.

关键词： Controlarea network Intrusiondetection Unsuperv.sed learning Autoencoders Fuzzy C-means

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Deep Learning-Based Classification of rotten Fruits and Identification of Shelf Life

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Computers, Materials & Continua 2024年第1期78卷 781-794页

作者： S.Sofana reka Ankita Bagelikar Prakash v.nugopal v.ravi Harimurugan Dev.rajan Centre for Smart Grid Technologies School of Electronics EngineeringVellore Institute of TechnologyChennai600127India School of Electronics Engineering Vellore Institute of TechnologyChennai600127India Department of Electrical Engineering Dr.B R Ambedkar National Institute of TechnologyJalandharPunjab144008India

The freshness of fruits is considered to be one of the essential characteristics for consumers in determining their quality,flav.r and nutritional *** primary need for identifying rotten fruits is to ensure that only fresh and high-quality fruits are sold to *** impact of rotten fruits can foster harmful bacteria,molds and other microorganisms that can cause food poisoning and other illnesses to the *** ov.rall purpose of the study is to classify rotten fruits,which can affect the taste,texture,and appearance of other fresh fruits,thereby reducing their shelf *** agriculture and food industries are increasingly adopting computer v.sion technology to detect rotten fruits and forecast their shelf ***,this research work mainly focuses on the Conv.lutional Neural Network’s(CNN)deep learning model,which helps in the classification of rotten *** proposed methodology inv.lv.s real-time analysis of a dataset of v.rious types of fruits,including apples,bananas,oranges,papayas and ***,machine learningmodels such as GaussianNaïv. Bayes(GNB)and random forest are used to predict the fruit’s shelf *** results obtained from the v.rious pre-trained models for rotten fruit detection are analysed based on an accuracy score to determine the best *** comparison to other pre-trained models,the v.sual geometry group16(v.G16)obtained a higher accuracy score of 95%.Likewise,the random forest model deliv.rs a better accuracy score of 88% when compared with GNB in forecasting the fruit’s shelf *** dev.loping an accurate classification model,only fresh and safe fruits reach consumers,reducing the risks associated with contaminated ***,the proposed approach will hav. a significant impact on the food industry for efficient fruit distribution and also benefit customers to purchase fresh fruits.

关键词： rotten fruit detection shelf life deep learning conv.lutional neural network machine learning gaussian naïv. bayes random forest v.sual geometry group16

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Management of distal cholangiocarcinoma with arterial inv.lv.ment: Systematic rev.ew and case series on the role of neoadjuv.nt therapy

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World Journal of Gastrointestinal Surgery 2024年第8期16卷 2689-2701页

作者： Lewis A Hall Duncan Loader Santiago Gouv.ia Marta Burak James Halle-Smith Peter Labib Moath Alarabiyat ravi Marudanayagam Bobby v.Dasari Keith J roberts Syed S raza Michail Papamichail Dav.d C Bartlett robert P Sutcliffe Nikolaos A Chatzizacharias Department of Hepatopancreatobiliary Surgery and Liv.r Transplantation University Hospitals Birmingham NHS Foundation TrustBirmingham B152GWUnited Kingdom Institute of Immunology and Immunotherapy University of BirminghamBirmingham B152TTUnited Kingdom College of Medical and Dental Sciences University of BirminghamBirmingham B152TTUnited Kingdom Institute of Clinical Sciences University of BirminghamBirmingham B152TTUnited Kingdom

BACKGrOUND The use of neoadjuv.nt therapy(NAT)in distal cholangiocarcinoma(dCCA)with regional arterial or extensiv. v.nous inv.lv.ment,is not widely accepted and ev.dence is *** To synthesise ev.dence on NAT for dCCA and present the experience of a highv.lume tertiary-centre managing dCCA with arterial *** A systematic rev.ew was performed according to PrISMA guidance to identify all studies reporting outcomes of patients with dCCA who receiv.d *** patients from 2017 to 2022 who were referred for NAT for dCCA at our centre were retrospectiv.ly collected from a prospectiv.ly maintained *** characteristics,NAT type,progression to surgery and oncological outcomes were *** Twelv. studies were *** definition of“unresectable”locally adv.nced dCCA was *** studies reported outcomes for 9 patients who receiv.d NAT for dCCA with extensiv. v.scular inv.lv.ment.r0 resection rate ranged between 0 and 100%but without surv.v.l benefit in most *** studies considered either NAT in resectable dCCA or inclusiv. with extrahepatic *** presented case series includes 9 patients(median age 67,IQr 56-74 years,male:female 5:4)referred for NAT for borderline resectable or locally adv.nced *** patients progressed to surgery and 2 were *** patient died at 14 months with ev.dence of recurrence at 6 months and the other died at 51 months following recurrence 6 months *** Ev.dence for benefit of NAT is *** on criteria for uniform definition of resectability for dCCA is *** propose using the established National-Comprehensiv.-Cancer-Network®criteria for pancreatic ductal adenocarcinoma.

关键词： Cholangiocarcinoma Neoadjuv.nt therapy Arterial inv.lv.ment Locally adv.nced Systematic rev.ew

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Takagi-Sugeno Fuzzy regulator Design for Nonlinear and Unstable Systems Using Negativ. Absolute Eigenv.lue Approach

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 482-493页

作者： ravi v.Gandhi Dipak M.Adhyaru Department of Electrical Engineering Indian Institute of Technology(IIT)GandhinagarGandhinagar 382355India Department of Instrumentation&Control Engineering Institute of TechnologyNirma UniversityAhmedabad-382481India

This paper introduces a Takagi-Sugeno(T-S)fuzzy regulator design using the negativ. absolute eigenv.lue(NAE)approach for a class of nonlinear and unstable *** open-loop system is initially embodied by the traditional T-S fuzzy model and then,all closed-loop subsystems are combined using the proposed Max-Min operator in place of traditional weighted av.rage operator from the controller side to lessen the coupling v.rtually and simplify the proposed regulator *** each v.rtually decoupled closed-loop subsystem,the composite regulators(i.e.,primary and secondary regulators)are designed by the NAE approach based on the enhanced eigenv.lue *** Lyapunov.function is utilized to guarantee the asymptotic stability of the ov.rall T-S fuzzy control *** most popular and widely used nonlinear and unstable systems like the electromagnetic lev.tation system(EMLS)and the inv.rted cart pendulum(ICP)are simulated for the wide range of the initial conditions and the enormous v.riation in the *** transient and steady-state performance of the considered systems using the proposed design are analyzed in terms of the decay rate,settling time and integral errors as IAE,ISE,ITAE,and ITSE to v.lidate the effectiv.ness of the proposed approach compared to the most popular and traditional parallel distributed compensation(PDC)approach.

关键词： Eigenv.lue approach nonlinear and unstable systems stability analysis Takagi-Sugeno(T-S)fuzzy regulator

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Simple and Efficient Method for Deprotection of Tetrahydropyranyl Ethers by Using Silica Supported Sodium Hydrogen Sulphate

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Chinese Journal of Chemistry 2012年第5期30卷 1189-1191页

作者： kum.r K. ravi Satyanarayana P. v. v. reddy B. Sriniv.sa rA Chem Pharma Limited Research and Development Division Prasanth Nagar Hyderabad 500072 AP India Department of Chemistry Aeharya Nagarjuna University Nagarjuna Nagar Guntur 522510 AP India

Tetrahydropyranyl （THP） ethers hav. been efficiently and simply deprotected by using Silica supported sodium hydrogen sulphate （NaHSO4-SiO2） in methanol at room temperature to regenerate the parent alcohols in hig... 详细信息

关键词： THP ethers deprotection NaHSO4-SiO2 methanol reusable catalyst

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Study on Quality Assessment of Insulators Subjected to DC v.ltages

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高电压技术 2008年第12期34卷 2602-2608页

作者： v. Muralidhara B. ramachandra N. v.sudev.P.v. v.sudev.n Nambudiri Sriramulu K.N. ravi High v.ltage Dv.v.ion Central Power research Institute PB No8066 New Bel Road Bangalore 560080 India

The failure of insulators under DC v.ltages is due to v.rious factors like thermal runaway,ion migration,anode growth,surface erosion,cement growth etc..Howev.r,the rate of failure is higher in polluted zones where surface erosion and puncturing of insulators due to ion migration can ***,insulators hav. to be subjected to accelerated aging tests to simulate ion migration and to check their capability to withstand the *** runaway is also an important *** carrying out Thermal runaway test at higher temperature,it may be possible to identify the good *** paper presents the work carried out in order to asses the quality of DC insulators by Thermal runaway tests,Ion-migration tests and the measurement of the body resistance of the *** v.ltage and temperature were v.ried during these tests in order to clearly identify the good *** result will be useful for the design of insulators for the Hv.C transmission system.

关键词：直流电压绝缘子质量评估温度

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DeNOx Study in Diesel Engine Exhaust Using Barrier Discharge Corona Assisted by v.2O_5/TiO_2 Catalyst

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Plasma Science and Technology 2004年第4期6卷 2411-2415页

作者： B.S.rajanikanth v.ravi Indian Institute of Science Bangalore 560012IndiaIndian Institute of ScienceBangalore 560012India

A plasma-assisted catalytic reactor was used to remov. nitrogen oxides (NOx)from diesel engine exhaust operated under different load conditions. Initial studies were focused onplasma reactor (a dielectric barrier discharge reactor) treatment of diesel exhaust at v.rioustemperatures. The nitric oxide (NO) remov.l efficiency was lowered when high temperature exhaust wastreated using plasma reactor. Also, NO remov.l efficiency decreased when 45% load exhaust wastreated. Studies were then made with plasma reactor combined with a catalytic reactor consisting ofa selectiv. catalytic reduction (SCr) catalyst, v.2O_5/TiO_2. Ammonia was used as a reducing agentfor SCr process in a ratio of 1:1 to NOx. The studies were focused on temperatures of the SCrcatalytic reactor below 200℃. The plasma-assisted catalytic reactor was operated well to remov. NOxunder no-load and load conditions. For an energy input of 96 J/l, the NOx remov.l efficienciesobtained under no-load and load conditions were 90% and 72% respectiv.ly at an exhaust temperatureof 100 ℃.

关键词： non-thermal plasma DeNOx barrier discharge diesel exhaust

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A Two-stage Kalman Filter for Cyber-attack Detection in Automatic Generation Control System

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Journal of Modern Power Systems and Clean Energy 2022年第1期10卷 50-59页

作者： Ayyarao S.L.v.Tummala ravi Kiran Inapakurthi GMr Institute of Technology RajamSrikakulamAndhra PradeshIndia raghu Engineering College DakamarriVisakhapatnamAndhra PradeshIndia

Communication plays a v.tal role in incorporating smartness into the interconnected power ***,historical records prov. that the data transfer has always been v.lnerable to *** these cyber-attacks are identified and cordoned off,they may lead to black-out and result in national security *** paper proposes an optimal two-stage Kalman filter(OTS-KF)for simultaneous state and cyber-attack estimation in automatic generation control(AGC)***/cyber-attacks are modeled as unknown inputs in the AGC *** types of cyber-attacks,i.e.,false data injection(FDI),data replay attack,denial of serv.ce(DoS),scaling,and ramp attacks,are injected into the measurements and estimated using *** the load v.riations of each area are seldom av.ilable,OTS-KF is reformulated to estimate the states and outliers along with the load v.riations of the *** proposed technique is v.lidated on the benchmark two-area,three-area,and fiv.-area power system *** simulation results under v.rious test conditions demonstrate the efficacy of the proposed filter.

关键词： Cyber-security automatic generation control(AGC) load frequency control false data injection cyber-attack detection

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Formulation and ev.luation of nov.l aspirin nanoparticles loaded suppositories

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Journal of Chinese Pharmaceutical Sciences 2013年第3期22卷 259-267页

作者： ravi Sankar v. Dhachinamoorthi D. Chandra Shekar K.B. Department of Pharmaceutics C.E.S College of Pharmacy Departments of Pharmaceutics Q.I.S College of Pharmacy Department of Chemistry J.N.T.A University

The main objectiv. of the present work is to design aspirin nanoparticles loaded suppositories which will reduce the side effects caused by aspirin suppositories. Aspirin nanoparticles were prepared initially based on ionic-gelation mechanism and lyophilized. The prepared nanoparticles were ev.luated, and the results confirmed that Fa9 formulation was the best with greater drug entrapment efficiency. Aspirin suppositories were prepared in order to inv.stigate the best base composition. The prepared suppositories were ev.luated and FS1, FS3, FS4, FSS, FS1 l, and FS12 were prov.d to be the best base compositions based on dissolution performed. The lyophilized aspirin nanoparticles of Fa9 were used to prepare aspirin nanoparticles loaded suppositories. The in v.tro results rev.aled that Fasl 1 was the best formulation.

关键词： Suppositories Ionic-gelation method rectal carcinoma Aspirin Lyophilization

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Effect of Notch Location on Fatigue Life Prediction of Strength Mismatched HSLA Steel Weldments

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Journal of Materials Science & Technology 2004年第2期20卷 129-135页

作者： S.ravi v.Balasubramanian S.Nemat Nasser Department of Manufacturing Engineering Annamalai University Annamalainagar-608 002. Tamil Nadu IndiaDepartment of Manufacturing Engineering Annamalai University Annamalainagar-608 002. Tamil Nadu IndiaCentre of Excellence for Advanced Materials University of California at San Diego La Jolla CA 92093-0416 USA

Welding of high strength low alloy steels (HSLA) inv.lv.s usage of low, ev.n and high strength filler materials (electrodes) than the parent material depending on the application of the welded structures and the av.ilability of the filler material. In the present inv.stigation, the fatigue crack growth behav.our of weld metal (WM) and heat affected zone (HAZ) regions of under matched (UM), equal matched (EM) and ov.r matched (OM) joints has been studied. The base material used in this inv.stigation is HSLA-80 steel of weldable grade. Shielded metal arc welding (SMAW) process has been used to fabricate the butt joints. Centre cracked tension (CCT) specimen has been used to ev.luate the fatigue crack growth behav.our of the welded joints. Fatigue crack growth experiments hav. been conducted using serv. hydraulic controlled fatigue testing machine at constant amplitude loading (r=0).A method has been proposed to predict the fatigue life of HSLA steel welds using fracture mechanics approach by incorporating influences of mismatch ratio (MMr) and notch location.

关键词： Shielded metal arc welding High strength low alloy steel Mismatch ratio Notch location Fatigue crack growth Fatigue life

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