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Evaluation of influence of cold atmospheric pressure argon plasma operating parameters on degradation of aqueous solution of Reactive Blue 198(RB-198)

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Plasma Science and Technology 2020年第5期22卷 114-125页

作者： K NAvANEETHA PANdIYARAJ d vASU P v A PAdMANABHAN M PICHUMANI R R dESHMUKH v KANdAvELU Research division of Plasma Processing(RdPP) Department of PhysicsSri Shakthi Institute of Engineering and TechnologyChinniyam Palayam(post)Coimbatore-641062India department of Nanoscience and Technology Sri Ramakrishna Engineering CollegeCoimbatore-641022India department of Physics Institute of Chemical TechnologyMatungaMumbai 400019India department of Chemistry Sri Shakthi Institute of Engineering and TechnologyL&T bypassChinniyam Palayam(post)Coimbatore-641062India

The intention of this work is to remove Reactive Blue 198(RB-198)dye components from simulated water solution using cold atmospheric pressure argon plasma *** solutions of RB-198 dye were treated as a function of various operating parameters such as applied potential,reaction time and distance between the plasma jet and surface of the *** efficiency of the degradation of RB-198 molecules was explored by means of Uv-vis *** reactive species involved during the treatment process were examined by optical emission spectra(OES).The present hydroxyl radicals(OH·radical)and hydrogen peroxide(H2O2)in the plasma-treated aqueous dye solutions were investigated using various spectroscopic *** other parameters such as total organic carbon(TOC),conductivity and p H were also *** toxicity of plasma-treated RB-198 solution was finally studied by diffusion bacterial analysis and by tracking seed germination *** results show that a higher degradation percentage of99.27%was acquired for the RB-198 treated at higher reaction time and applied potential,and shorter distance between the plasma jet and water *** may be due to the formation of various reactive oxygen(OH·radical,atomic oxygen(O)and H2O2)and nitrogen species(nitric oxide(NO)radicals and N2 second positive system(N2 SPS))during the processes as confirmed by OES analysis and other spectroscopy ***(17.7%-81.8%)and pH(7.5-3.4)values of the plasma-treated RB-198 decreased significantly with respect to various operation parameters,which indicates the decomposition of RB-198 molecules in the aqueous ***,the conductivity of plasma-treated RB-198 aqueous solutions was found to have increased linearly during the plasma treatment due to the formation of various ionic species in aqueous *** toxicity analysis clearly exhibits the non-toxic behavior of plasma-treated RB-198 aqueous solution towards the bacterial growth and germination of see

关键词： RB-198 degradation non-toxicity cold atmospheric pressure plasma jet

Experience gained in analyzing severe accidents for WWER RP using CC SOCRAT

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Frontiers in Energy 2021年第4期15卷 872-886页

作者： S.I.PANTYUSHIN А.v.LITYSHEv A.v.NIKOLAEvA O.v.AULOvA d.L.GASPAROv v.v.ASTAKHOv M.A.BYKOv Non-stationary Thermohydraulics department OKB Gidropress JSC 142103PodolskRussia

The current Russian regulatory documents on the safety of nuclear power plant(NPP)specify the requirements regarding design basis accidents(dBAs)and beyond design basis accidents(BdBAs),including severe accidents(SAs)with core meltdown,in NPP design(NP-001-15,NP-082-07,and others).For a rigorous calculational justification of BdBAs and SAs,it is necessary to develop an integral CC that will be in line with the requirements of regulatory documents on verification and certification(Rd-03-33-2008,Rd-03-34-2000)and will allow for determining the amount of data required to provide information within the scope stipulated by the requirements for the structure of the safety analysis report(SAR)(NP-006-16).The system of codes for realistic analysis of severe accidents(SOCRAT)(formerly,thermohydraulics(RATEG)/coupled physical and chemical processes(SvECHA)/behavior of core materials relocated into the reactor lower plenum(HEFEST))was developed in Russia to analyze a wide range of SAs at NPP with water-cooled water-moderated power-generating reactor(WWER)at all stages of the *** to the code and broadening of its applicability are continually being pursued by the code developers(Nuclear Safety Institute of the Russian Academy of Sciences(IBRAE RAN))with OKB Gidropress JSC and other ***,the SOCRAT/В1 code can be used as a base tool to obtain realistic estimates for all parameters important for computational justification of the reactor plant(RP)safety at the in-vessel stage of SAs with fuel *** perform analyses using CC SOCRAT/В1,the experience gained during execution of thermohydraulic codes is applied,which allows for minimizing the uncertainties in the results at the early stage of an accident *** study presents the results of the work performed in 2010–2020 in OKB Gidropress JSC using the CC SOCRAT/В*** have been considered to develop calculational models and analyze SAs using CC *** process,which is cle

关键词： system of codes for realistic analysis of severe accidents(SOCRAT) design basis accidents(dBAs) severe accidents(SAs) computer code(CC) nuclear power plant(NPP)design water-cooled water-moderated(WWER) modeling model safety requirements

Results of the Main Phase of Ion Separation in the Process of Plasma-Optical Mass Separation

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Plasma Science and Technology 2015年第10期17卷 862-868页

作者： v.M.BARdAKOv S.d.IvANOv A.v.KAZANTSEv N.A.STROKIN Institute for Physics and Technology Irkutsk State Technical University

This paper presents separation results of a mixture of nitrogen, argon and krypton ions in the process of plasma-optical mass separation on the POMS-E-3 separator model. We determined the behavior of the separation with a change in the value of magnetic field induction in the azimuthator and in the degree of compensation of the spatial charge in ion flows. An analysis is performed for experimental data by correlation with the results of a theoretical study and numerical experiments. The objectives of future experiments are outlined.

关键词： plasma-optical mass separation plasma accelerator trajectories spatial charge

Coherent States for the Two-dimensional dirac-Moshinsky Oscillator Coupled to an External Magnetic Field

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Communications in Theoretical Physics 2015年第3期63卷 271-274页

作者： d.Ojeda-Guillen R.d.Mota v.d.Granados Escuela Superior de Física y Matemáticas Instituto Politécnico NacionalEd.9Unidad Profesional Adolfo López MateosC.P.07738México D.F.Mexico Escuela Superior de Ingeniería Mecánica y Eléctrica Unidad CulhuacánInstituto Politécnico NacionalAv.Santa Ana No.1000Col.San Francisco CulhuacánDelegación CoyoacánC.P.04430Mexico D.F.Mexico

We show that the（2＋1）-dimensional dirac-Moshinsky oscillator coupled to an externa/ magnetic field can be treated algebraically with the SU（1,1） group theory and its group *** use the su（1,1） irreducible representation theory to find the energy spectrum and the ***,with the su（1,1） group basis we construct the relativistic coherent states in a closed form for this problem.

关键词： Lie algebras coherent states dirac equation dirac-Moshinsky oscillator

Effect of silica source on photocatalytic properties of Bi_(2)O_(3)/Bi_(2)SiO_(5) heterostructure

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Journal of Bioresources and Bioproducts 2023年第2期8卷 176-186页

作者： O.d.Arefieva M.S.vasilyeva L.A.Zemnukhova d.P.Opra d.A.Nikolaeva v.v.Tkachev d.H.Shlyk Far Eastern Federal University Vladivostok 690922Russian Federation Institute of Chemistry Far-Eastern BranchRussian Academy of SciencesVladivostok 690922Russian Federation

The Bi_(2)O_(3)/Bi_(2)SiO_(5) heterostructures were obtained with various samples of silica as a precursor:on the basis of biogenic silica isolated from rice husk and rice straw and the silica of mineral ori-gin.A mixture of Bi(NO_(3))_(3) and SiO_(2) with a mass content of 15%was used for synthesizing all the *** transform infrared(FT-IR)spectroscopy,scanning electron microscope(SEM),X-ray phase,X-ray fluorescence,and ultraviolet-visible diffused reflectance spectroscopy(Uv-vis dRS)were used to systematically characterize as-obtained *** of methyl orange in neutral aqueous solutions(pH=6.8)under Uv irradiation was studied to evaluate their photocatalytic ***,bandgaps,the value of the zero charge point,and photo-catalytic activity of the samples depended on the characteristics of the original *** degree of methyl orange degradation reached the maximum values(81%−85%)for samples based on precipitated silica from rice husks,straw,and the minimum value(16%)for a composite with thermal silica from rice *** based on thermal silica from rice husks and reagents from mineral raw materials did not statistically differ from each other in the degree of methyl orange degradation(67%−74%).

关键词： Biogenic silica Heterostructures Photocatalysis Rice husk Rice straw

Automatic Sentimental Analysis by Firefly with Levy and Multilayer Perceptron

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Computer Systems Science & Engineering 2023年第9期46卷 2797-2808页

作者： d.Elangovan v.Subedha School of Computing Computer Science and EngineeringSathyabama Institute of Science and TechnologyChennai600118India Computer Science and Engineering Panimalar Institute of TechnologyChennai600069India

The field of sentiment analysis(SA)has grown in tandem with the aid of social networking platforms to exchange opinions and *** people share their views and ideas around the world through social media like Facebook and *** goal of opinion mining,commonly referred to as sentiment analysis,is to categorise and forecast a target’s *** on if they provide a positive or negative perspective on a given topic,text documents or sentences can be *** compared to sentiment analysis,text categorization may appear to be a simple process,but number of challenges have prompted numerous studies in this area.A feature selection-based classification algorithm in conjunction with the firefly with levy and multilayer perceptron(MLP)techniques has been proposed as a way to automate sentiment analysis(SA).In this study,online product reviews can be enhanced by integrating classification and feature *** firefly(FF)algorithm was used to extract features from online product reviews,and a multi-layer perceptron was used to classify sentiment(MLP).The experiment employs two datasets,and the results are assessed using a variety of *** account of these tests,it is possible to conclude that the FFL-MLP algorithm has the better classification performance for Canon(98%accuracy)and iPod(99%accuracy).

关键词： Firefly algorithm feature selection feature extraction multi-layer perceptron automatic sentiment analysis

Hydrodynamic Interaction of Elastic Capsules in Bounded Shear Flow

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Communications in Computational Physics 2014年第9期16卷 1031-1055页

作者： d.v.Le Zhijun Tan Institute of High Performance Computing Agency for ScienceTechnology and Research1 Fusionopolis Way#16-16 ConnexisSingapore 138632 School of Mathematics and Computational Science Sun Yat-sen UniversityGuangzhou 510275China Province Key Laboratory of Computational Science Sun Yat-sen UniversityGuangzhou 510275China.

This paper presents a modified Loop’s subdivision algorithm for studying the deformation of a single capsule,the hydrodynamic interaction between two capsules and the hydrodynamic diffusion of a suspension of capsules in bounded shear flow.A subdivision thin-shell model is employed to compute the forces generated on the surface of the elastic capsule during *** capsule surface is approximated using the modified Loop’s subdivision scheme which guarantees bounded curvature and C1 continuity everywhere on the limit *** present numerical technique has been validated by studying the deformation of a spherical capsule in shear *** are also performed for a biconcave capsule over a wide range of shear rates and viscosity ratios to investigate its *** addition,the hydrodynamic interaction between two elastic capsules in bounded shear flow is *** on the wall separation distance,the trajectory-bifurcation points that separate reversing and crossing motions for both spherical and biconcave capsules can be *** to the spherical capsules,the biconcave capsules exhibit additional types of interaction such as rotation and head-on *** head-on collision results in a large trajectory shift which contribute to the hydrodynamic diffusion of a suspension.A suspension of a large number of biconcave capsules in shear flow is also simulated to show the ability of the modified scheme in running a large-scale simulation over a long period of time.

关键词： Thin shell elastic capsules red-blood cells subdivision surfaces immersed boundary method Navier-Stokes equations.

Hyperparameter Tuning for deep Neural Networks Based Optimization Algorithm

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Intelligent Automation & Soft Computing 2023年第6期36卷 2559-2573页

作者： d.vidyabharathi v.Mohanraj Sona College of Technology Computer Science and EngineeringSalem636005India Sona College of Technology Information TechnologySalem636005India

For training the present Neural Network(NN)models,the standard technique is to utilize decaying Learning Rates(LR).While the majority of these techniques commence with a large LR,they will decay multiple times over *** has been proved to enhance generalization as well as *** parameters,such as the network’s size,the number of hidden layers,drop-outs to avoid overfitting,batch size,and so on,are solely based on *** work has proposed Adaptive Teaching Learning Based(ATLB)Heuristic to identify the optimal hyperparameters for diverse *** we consider three architec-tures Recurrent Neural Networks(RNN),Long Short Term Memory(LSTM),Bidirectional Long Short Term Memory(BiLSTM)of deep Neural Networks for *** evaluation of the proposed ATLB is done through the various learning rate schedulers Cyclical Learning Rate(CLR),Hyperbolic Tangent decay(HTd),and Toggle between Hyperbolic Tangent decay and Triangular mode with Restarts(T-HTR)*** results have shown the performance improvement on the 20Newsgroup,Reuters Newswire and IMdB dataset.

关键词： deep learning deep neural network(dNN) learning rates(LR) recurrent neural network(RNN) cyclical learning rate(CLR) hyperbolic tangent decay(HTd) toggle between hyperbolic tangent decay and triangular mode with restarts(T-HTR) teaching learning based optimization(TLBO)

Plasma electrolytic oxidation of the magnesium alloy MA8 in electrolytes containing TiN nanoparticles

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Journal of Materials Science & Technology 2017年第5期33卷 461-468页

作者： d.v.Mashtalyar S.v.Gnedenkov S.L.Sinebryukhov I.M.Imshinetskiy A.v.Puz Institute of Chemistty Far Eastern BranchRussian Academy of Sciences 159Prosp.100-1etya VladivostokaVladivostok 690022Russia Far Eastern Federal University 8 Sukhanova St.Vladivostok690950Russia

The formation of protective multifunctional coatings on magnesium alloy MA8 using plasma electrolyt- ic oxidation （PEO） in an electrolytic system containing nanosized particles of titanium nitride was investigated. Electrochemical and mechanical properties of the obtained layers were examined. It was established that microhardness of the coating with the nanoparticle concentration of 3 gl-1 increased twofold （4.2 ± 0.5 GPa）, while wear resistance decreased （4.97 × 10-6 mm3 N-1 m-1）, as compared to re- spective values for the PEO-coating formed in the electrolyte without nanoparticles （2.1 ± 0.3 GPa, 1.12 × 10.5 mm3 N-1 m-1）.

关键词： Magnesium alloys Protective coatings Plasma electrolytic oxidation Corrosion titanium nitride Nanoparticles