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Route Planning for Autonomous Transmission of Large Sport Utility Vehicle

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Computer Systems Science & Engineering 2023年第4期45卷 659-669页

作者： V.A.vijayakumar J.Shanthini S.karthik k.Srihari SNS College of Technology Coimbatore641035TamilnaduIndia

The autonomous driving aims at ensuring the vehicle to effectively sense the environment and use proper strategies to navigate the vehicle without the interventions of ***,there exist a prediction of the background scenes and that leads to discontinuity between the predicted and planned *** optimal prediction engine is required that suitably reads the background objects and make optimal *** this paper,the author(s)develop an autonomous model for vehicle driving using ensemble model for large Sport Utility Vehicles(SUVs)that uses three different modules involving(a)recognition model,(b)planning model and(c)prediction *** study develops a direct realization method for an autonomous vehicle *** direct realization method is designed as a behavioral model that incorporates three different modules to ensure optimal autonomous *** behavioral model includes recognition,planning and prediction modules that regulates the input trajectory processing of input video datasets.A deep learning algorithm is used in the proposed approach that helps in the classification of known or unknown objects along the line of *** model is compared with conventional deep learning classifiers in terms of recall rate and root mean square error(RMSE)to estimate its *** results on different traffic environment shows that the Ensemble Convolutional Network Reinforcement Learning(E-CNN-RL)offers increased accuracy of 95.45%,reduced RMSE and increased recall rate than existing Ensemble Convolutional Neural Networks(CNN)and Ensemble Stacked CNN.

关键词： Artificial intelligence information system security and privacy fuzzy modelling deep neural networks machine learning reinforcement learning CNN SUV

A Chaotic Pulse Train Generator Based on Henon Map

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Intelligent Automation & Soft Computing 2023年第7期37卷 1197-1207页

作者： Babu H.Soumya N.vijayakumar k.Gopakumar College of Engineering Trivandrum695016India Government Engineering College Barton HillTrivandrum695035India APJ Abdul kalam Technological University Trivandrum695016India

The Henon map forms one of the most-studied two-dimensional discrete-time dynamical systems that exhibits chaotic *** Henon map takes a point(Xn,Yn)in the plane and maps it to a new point(Xn+1,Yn+1).In this paper,a chaotic pulse generator based on the chaotic Henon map is *** consists of a Henon map function subcircuit to realize the Henon map and another subcircuit to perform the iterative *** Henon map subcircuit comprises operational amplifiers,multipliers,delay elements and resistors,whereas,the iterative subcircuit is implemented with a simple design that comprises of an edge forming circuit followed by a monostable multivibrator and a voltage controlled switch without the use of any clock *** proposed design can be used to realize the Henon map and also to generate a chaotic pulse train,with a controllable time interval and pulse *** proposed circuit is implemented and simulated using Multisim 13.0 and MATLAB *** chaotic nature of the generated pulse train and also the time interval between the consecutive pulses is verified by the calculation of its Lyapunov exponents.

关键词： Chaos iterated maps henon map chaotic pulse train lyapunov exponents

Establishing the role of detoxifying enzymes in field-evolved resistance to various insecticides in the brown planthopper （Nilaparvata lugens） in South India

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Insect Science 2017年第1期24卷 35-46页

作者： vijayakumar Maheshwari Malathi Sushil k. Jalali Dandinashivara k. Sidde Gowda Muthugounder Mohan Thiruvengadam Venkatesan Division of Molecular Entomology ICAR-National Bureau of Agricultural Insect Resources Bengaluru 560 024 Karnataka India Department of Entomology College of Agriculture University of Agricultural Sciences-Bengaluru V.C. Farm Mandya 571 478 Karnataka India

The brown planthopper （BPH）, Nilaparvata lugens （Stal）, is one of the major pests of rice throughout Asia. Extensive use of insecticides for suppressing N. lugens has resulted in the development of insecticide resistance leading to frequent control failures in the field. The aim of the present study was to evaluate resistance in the field populations of N. lugens from major rice growing states of South India to various insecticides. We also determined the activity of detoxifying enzymes （esterases [ESTs], glutathione S- transferases [GSTs], and mixed-fimction oxidases [MFOs]）. Moderate levels of resistance were detected in the field populations to acephate, thiamethoxam and buprofezin （resistance factors 1.05-20.92 fold, 4.52-14.99 fold, and 1.00-18.09 fold, respectively） as compared with susceptible strain while there were low levels of resistance to imidacloprid （resistance factor 1.23-6.70 fold） and complete sensitivity to etofenoprox （resistance factor 1.05- 1.66 fold）. EST activities in the field populations were 1.06 to 3.09 times higher than the susceptible strain while for GST and MFO the ratios varied from 1.29 to 3.41 and 1.03 to 1.76, respectively. The EST activity was found to be correlated to acephate resistance （r = 0.999, P ≥ 0.001）. The high selection pressure of organophosphate, neonicotinoid, and insect growth regulator （IGR） in the field is likely to be contributing for resistance in BPH to multiple insecticides, leading to control failures. The results obtained will be beneficial to IPM recommendations for the use of effective insecticides against BPH.

关键词： esterases glutathione S-transferases insecticide resistance mixed function oxidases Nilaparvata lugens toxicological bioassay

Nephroprotective activity of Solanum xanthocarpum fruit extract against gentamicin-induced nephrotoxicity and renal dysfunction in experimental rodents

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Asian Pacific Journal of Tropical Medicine 2012年第9期5卷 686-691页

作者： Talib Hussain Ramesh k Gupta k Sweety Bavani Eswaran M vijayakumar Chandana Venkateswara Rao Pharmacognosy and Ethnopharmacology Division National Botanical Research InstituteLucknowUttar Pradesh226001India Department of Pharmacology and Toxicology Faculty of PharmacyIntegral UniversityLucknowUttar Pradesh226001India

Objective:To evaluate nephroprotective potential of Solarium xanthocarpum(***) fruit extract(SXE) against gentamicin(GM) induced nephrotoxicity) and renal dysfunction. Methods:Twenty-four Wistar rats were divided into four groups(n=6).Control rats that received normal saline(i.p.) and 0.5%carboxymethyl cellulose(p.o.) per day lor 8 *** was induced in rats by intraperitoneal administration of GM(100 mg/kg/d for 8 d) and were treated with SXE(200 and 400 mg/kg/d(p.o.) for 8 d).Plasma and urine urea and creatinine,kidney weight,urine output,blood urea nitrogen,renal enzymatic and non-enzymatic antioxidants and lipid peroxidation was evaluated along with histopathological investigation in various experimental groupsof ***:It was observed that the GM treatment induced significant elevation(Pkidney weight,blood urea nitrogen, renal lipid peroxidation along with significant decrement(Pkg treatment to GM treated rats recorded significant decrement(up to Pkidney tissues too correlated with the biochemical ***:These finding powerfully supports that S,xanthocarpum fruit extract acts in the kidney as a potent scavenger of free radicals to prevent the toxic effects of GM both in the biochemical and histopathological parameters and thus validates its elhnomedicinal use.

关键词： Solanum xanthocarpum Gentamicin Antioxidants Nephrotoxicity Renal dysfunction

Thermal Degradation kinetics of Structurally Diverse Poly(bispropargyl ethers-bismaleimide) Blends

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Chinese Journal of Polymer Science 2016年第3期34卷 253-253,254-267页

作者： Jeyaraj Pandiyan Dhanalakshmi Mahendran Arunjunai Raj Chinnaswamy Thangavel vijayakumar Department of Chemistry Kamaraj College of Engineering and Technology S.P.G.C.Nagar Wood Carinthian Competence Centre Kompetenzzentrum Holz GmbH Department of Polymer Technology Kamaraj College of Engineering and Technology S.P.G.C.Nagar

Structurally diverse bispropargyl ethers using resorcinol,quinol,4,4￠-dihydroxy biphenyl,bisphenol-A,4,4￠-dihydroxy diphenyl ketone,4,4￠-dihydroxy diphenylsulphone,trimethyl indane bisphenol and tetramethyl spirobiindane bisphenol were prepared by using phase transfer *** materials were separately blended with 4,4￠-bismaleimido diphenyl methane（BMIM）in mole ratios（0.5：0.5）.The materials were thermally cured and the structural characterisation and the thermal properties of these cross-linked materials are investigated using Fourier-transform infrared（FTIR）spectrophotometer and thermogravimetric analyzer（TGA）.Among the different materials investigated poly MRPE,poly MBPEBPA and poly MSPE show higher onset degradation temperature of 300°C indicating higher thermal *** degradation kinetics is investigated using Flynn-Wall-Ozawa（FWO）,Vyazovkin（VYZ）and Friedman（FRD）*** the various cured materials investigated,the activation energy（Ea-D）values obtained for poly MRPE and poly MkPE were observed to increase continuously froma=0.2 to 0.8 and the values range from 199 kJ/mol to 245 k J/mol and 153 k J/mol to 295 k J/mol *** crosslinked materials resulting from these bispropargyl monomers definitely need more energy for bond cleavage due to the presence of more aromatic *** volatile products obtained during the thermal degradation of the polymers were analyzed using thermogravimetric-Fourier transform infrared analyses（TG-FTIR）.The phenols,substituted phenols,carbon monoxide,carbon dioxide and small amount of aniline were found to be the major products during thermal degradation of these cured blends.

关键词： Bispropargyl ethers Bismaleimide TG Degradation kinetics TG-FTIR

Dye reduction-based electron-transfer activity monitoring assay for assessing microbial electron transfer activity of microbial fuel cell inocula

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Journal of Environmental Sciences 2020年第10期32卷 171-177页

作者： kartik S.Aiyer Roshan Rai B.S.vijayakumar Department of Biosciences Sri Sathya Sai Institute of Higher LearningPrasanthi NilayamPuttaparthiAndhra Pradesh-515134India

Microbial fuel cells (MFC) utilize microbes as catalysts to convert chemical energy to *** used for MFC operation must therefore contain active microbial *** dye reduction-based electron-transfer activity monitoring (DREAM) assay was employed to evaluate different inocula used in MFCs for their microbial bioelectrical *** assay utilizes the redox property of Methylene Blue to undergo color change from blue to colorless state upon microbial *** extent of Methylene Blue reduction was denoted as the DREAM assay *** assay was initially performed on a microbial culture along with the growth curve and estimation of colony forming units (CFUs).DREAM coefficient correlated to the CFU/m L obtained over time as growth *** assay was then extended to water samples (domestic sewage,lake and a man-made pond) serving as inocula in *** wastewater gave the highest DREAM coefficient (0.300±0.05),followed by pond (0.224±0.07) and lake (0.157±0.04) water *** density obtained conformed to the DREAM coefficient values,with the three samples generating power densities of 46.45±5.1,36.12±3.2 and 25.08±4.3 m W/m^2 *** have also studied the role of addition of various carbon sources and their concentrations towards improving the sensitivity of the *** DREAM assay is a rapid,easy-to-perform and cost-effective method to assess inocula for their suitability as anolytes in terms of electron transfer potential in MFCs.

关键词： Dye reduction Electron transfer Methylene Blue Microbial fuel cell Wastewater

Application of IITM-RANS3D to free-fall water entry of prismatic and non-prismatic finite wedges

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Journal of Hydrodynamics 2023年第3期35卷 417-430页

作者： Shaswat Saincher kshitij Srivastava R.vijayakumar V.Sriram Center for Maritime Experiments to Maritime Experience(ME2ME) Indian Institute of Technology MadrasChennaiIndia Department of Ocean Engineering Indian Institute of Technology MadrasChennaiIndia

High-speed watercraft and ships undergo coupled motions which make the front portion of the hull exit and violently re-enter *** induces short-term slamming loads that may compromise the structural integrity of the *** slamming of the bow can be modeled as straight wedges of different deadrise angles(DRAs)falling into water from different *** advent of computational fluid dynamics has allowed the problem of wedge-slamming to be simulated using the full Navier-Stokes equations thus complementing the pioneering studies based on ***,most researchers are opting to use commercial software to simulate the wedge-impact problem as it allows access to overset meshing algorithms which are robust in modeling the wedge as a moving *** boundary methods(EBMs)offer some advantages over overset meshing in that the mesh only needs to be generated once and Cartesian mesh-based solvers can be ***,the application of EBMs to wedge-impact has been limited in the literature and merits further *** this context,we investigate the applicability of the fast-fictitious-domain(FFD)based embedded boundary treatment to simulate the violent water-entry of *** extend our in-house Navier-Stokes model IITM-RANS3D to handle floating bodies through integration of a rigid-body dynamics solver and an algorithm to embed three-dimensional stereolithography(STL)geometries as solids over a Cartesian *** proposed algorithm is extensively benchmarked against variable DRA wedge-slamming experiments reported in the literature as well as constant DRA wedge-slamming experiments performed *** good agreement is reported in terms of the time-history of hydrodynamic impact pressures measured at various locations on the hull as well as the wedge motion responses thus demonstrating the suitability of FFD for simulating the coupled hydrodynamics of slamming for simplified hull geometries.

关键词： Wedge water entry slamming fast-fictitious-domain IITM-RANS3D experiments

Fuzzy System Design Using Current Amplifier for 20 nm CMOS Technology

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Computers, Materials & Continua 2022年第7期72卷 1815-1829页

作者： Shruti Jain Cherry Bhargava vijayakumar Varadarajan ketan kotecha Jaypee University of Information Technology Waknaghat172234India Symbiosis Institute of Technology Symbiosis International(Deemed University)Pune411021India School of Computer Science and Engineering The University of New South WalesSydneyNSW 2052Australia Symbiosis Centre for Applied Artificial Intelligence Symbiosis International(Deemed University)Pune411021India

In the recent decade,different researchers have performed hardware implementation for different applications covering various areas of *** this research paper,a novel analog design and implementation of different steps of fuzzy systems with current differencing buffered amplifier(CDBA)are proposed with a compact structure that can be used in many signal processing *** proposed circuits are capable of wide input current range,simple structure,and are highly *** electrical parameters were compared for the proposed fuzzy system when using different membership *** novelty of this paper lies in the electronic implementation of different steps for realizing a fuzzy system using current *** the power supply voltage of CDBA is 2V,it results in 155mW,power dissipation;4.615kΩ,input resistance;366kΩ,output resistances;and 189.09 dB,common-mode rejection ratio.A 155.519 dB,voltage gain,and 0.76V/μs,the slew rate is analyzed when the power supply voltage of CDBAis *** fuzzy system is realized in 20nm CMOS technology and investigated with an output signal of high precision and high speed,illustrating that it is suitable for realtime *** this research paper,a consequence of feedback resistance on the adder circuit and the defuzzified circuit is also analyzed and the best results are obtained using 100k *** structure has a low hardware complexity leading to a low delay and a rather high quality.

关键词： Current amplifiers membership functions fuzzy system fuzzy operators defuzzified circuit feedback resistance

Molecular dynamics approach on intermolecular interaction between n-icosane and gemini surfactant assisted nanoparticles

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Petroleum Research 2022年第3期7卷 366-371页

作者： Shamala Devi vijayakumar Junaidi Zakaria Norida Ridzuan Author's Faculty of Chemical and Process Engineering Technology Universitiy Malaysia Pahang26300GambangPahangMalaysia

Wax molecules tend to aggregate,and form wax solid at low temperature and result in a wax *** wax inhibitors are introduced to prevent wax ***,the performance of chemical wax inhibitors is temperature *** method using Molecular Dynamics(MD)simulation is used in this research to investigate how temperature affects wax inhibition using 2,5,8,11 Tetramethyl 6 dodecyn-5,8 Diol Ethoxylate Gemini surfactant(GS)and nanoparticles silicon dioxide(NP1),tin oxide(NP2),and nickel oxide(NP3).Wax-wax interaction of H58⋯H61of n-icosane and wax-solute interaction of hydrogen atom from n-icosane wax and carbonyl oxygen atoms from GS and NPs was investigated via radial distribution function analysis(rdf).The findings revealed that GS/NPs blends have a better chance of wax inhibition than corresponding *** that,wax-wax interaction was strongest at 288k,indicating the higher chances of wax formation at low *** simulation is a promising tool for identifying atoms responsible for the wax formation and inhibition and can be used for chemical wax inhibitor screening for different temperature.

关键词： Gemini surfactant Nanoparticles rdf analysis Intermolecular interaction Temperature