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Chinese Physics C 2024年第3期48卷 65-71页

作者：杨过段芳芳王康杨彦云孙志宇 Valdir Guimarães 庞丹阳陈文棣金磊许世伟马军兵马朋白真汪凌昊刘泉王惠仁吕冰锋郭松 mukhi kumar raju 王秀华李荣华张玉虎周小红胡正国徐瑚珊 CAS Key Laboratory of High Precision Nuclear Spectroscopy Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100080China Instituto de Física Universidade de São PauloRua do Matão1371São Paulo 05508-090SPBrazil School of Physics and Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Physics Science and Engineering Tongji UniversityShanghai 200092China School of physics and Optoelectronic Engineering Anhui UniversityHefei 230601China Department of Physics GITAM School of ScienceGITAM UniversityVisakhapatnam 530045India

The elastic scattering angular distributions of ^(13)C at 340 MeV and ^(14)C at 294 MeV and 342 MeV on a ^(208)Pb target,which correspond to approximately five times the Coulomb barriers,were measured at the Radioactive Ion Beam Line in *** data were analyzed within the optical model and continuum-discretized coupled-channels(CDCC)framework,and the results of both calculations could effectively account for the experimental *** differential cross sections of elastic scattering revealed no particular suppression at the Coulomb nuclear interference peak angles,suggesting that the breakup coupling effects on the elastic scattering angular distributions were negligibly small in this incident energy *** contributions from the couplings with inelastic states to the elastic cross sections were of minor importance within the angular range covered by these experiments.

关键词： elastic scattering radioactive ion beam angular distribution optical model coupling effects

Computational Fluid Dynamics Study of a Compound Flow Field for Proton Exchange Membrane Fuel Cell(PEMFC) Performance Enhancement

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Journal of Thermal Science 2022年第6期31卷 2374-2384页

作者： Venkateswarlu VELISALA Gandhi PULLAGURA Naveen kumar CHINNAM raju GANTA Automobile Engineering Section Damacharla Anjaneyulu Government PolytechnicOngole 523002Andhra PradeshIndia GITAM Institute of Technology Visakhapatnam 530045Andhra PradeshIndia Vishnu Institute of Technology Bhimavaram 534202Andhra PradeshIndia BVC Engineering College Odalarevu 533210Andhra PradeshIndia

The aim of the present work is to evaluate proton exchange membrane(PEM) fuel cell performance with a modified serpentine flow field with right angle turn by numerical modeling. A 3-D PEM fuel cell model of size 50 cm^(2) active area is developed. A conventional serpentine flow field is modified and the same is considered for the supply of reactants. Computational fluid dynamics(CFD) based simulations were conducted to analyse the pressure drop, distribution of reactants(H_(2) and O_(2)), liquid water activity, current flux density and water content in the membrane. From the simulation results, polarization curve is drawn to validate the literature data of PEMFC with the conventional serpentine flow field. Comparison of simulated polarization curve with literature data revealed that modified serpentine flow field performance is better than conventional serpentine flow field as it offers better water exclusion and uniform sharing of reactants. From this study, it is concluded that model of flow field pattern influences the functioning of fuel cell and utmost care must take while selecting a pattern for flow field of PEM fuel cell.

关键词： PEM fuel cell CFD current density water removal modified serpentine flow field membrane water content

Next-Generation Intelligent MXene-Based Electrochemical Aptasensors for Point-of-Care Cancer Diagnostics

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Nano-Micro Letters 2022年第6期14卷 248-281页

作者： Arpana Parihar Ayushi Singhal Neeraj kumar raju Khan MohdAkram Khan Avanish KSrivastava Industrial Waste Utilization Nano and BiomaterialsCSIR-Advanced Materials and Processes Research Institute(AMPRI)Hoshangabad RoadBhopal 462026MPIndia Academy of Scientific and Innovative Research(AcSIR) Ghaziabad 201002India

Delayed diagnosis of cancer using conventional diagnostic modalities needs to be addressed to reduce the mortality rate of ***,2 D nanomaterial-enabled advanced biosensors have shown potential towards the early diagnosis of *** high surface area,surface functional groups availability,and excellent electrical conductivity of MXene make it the 2 D material of choice for the fabrication of advanced electrochemical biosensors for disease ***-enabled electrochemical aptasensors have shown great promise for the detection of cancer biomarkers with a femtomolar limit of ***,the stability,ease of synthesis,good reproducibility,and high specificity offered by MXene-enabled aptasensors hold promise to be the mainstream diagnostic *** this review,the design and fabrication of MXene-based electrochemical aptasensors for the detection of cancer biomarkers have been ***,various synthetic processes and useful properties of MXenes which can be tuned and optimized easily and efficiently to fabricate sensitive biosensors have been ***,futuristic sensing applications along with challenges will be deliberated herein.

关键词： MXene Electrochemical devices POCT Aptamer Cancer diagnostics

Performance evaluation of DHRR-RIS based HP design using machine learning algorithms

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Intelligent and Converged Networks 2023年第3期4卷 237-260页

作者： Girish kumar N G Sree Ranga raju M N the Department of Electronics and Telecommunication Engineering Bangalore Institute of TechnologyVisvesvaraya Technological UniversityBangalore 560004India the Department of Electronics and Communication Engineering Bangalore Institute of TechnologyVisvesvaraya Technological UniversityBangalore 560004India

Reconfigurable Intelligent Surfaces(RIS)have emerged as a promising technology for improving the reliability of massive MIMO communication ***,conventional RIS suffer from poor Spectral Efficiency(SE)and high energy consumption,leading to complex Hybrid Precoding(HP)*** address these issues,we propose a new low-complexity HP model,named Dynamic Hybrid Relay Reflecting RIS based Hybrid Precoding(DHRR-RIS-HP).Our approach combines active and passive elements to cancel out the downsides of both conventional *** first design a DHRR-RIS and optimize the pilot and Channel State Information(CSI)estimation using an adaptive threshold method and Adaptive Back Propagation Neural Network(ABPNN)algorithm,respectively,to reduce the Bit Error Rate(BER)and energy *** optimize the data stream,we cluster them into private and public streams using Enhanced Fuzzy C-Means(EFCM)algorithm,and schedule them based on priority and emergency *** maximize the sum rate and SE,we perform digital precoder optimization at the Base Station(BS)side using Deep Deterministic Policy Gradient(DDPG)algorithm and analog precoder optimization at the DHRR-RIS using Fire Hawk Optimization(FHO)*** implement our proposed work using MATLAB R2020a and compare it with existing works using several validation *** results show that our proposed work outperforms existing works in terms of SE,Weighted Sum Rate(WSR),and BER.

关键词： Reconfigurable Intelligent Surfaces(RIS) Dynamic Hybrid Relay Reflecting(DHRR)-RIS Multi User Multiple Input Multiple Output(MU-MIMO) hybrid precoder machine learning and deep learning algorithms channel state estimation

State-of-the-art and future directions of machine learning for biomass characterization and for sustainable biorefinery

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Journal of Energy Chemistry 2023年第6期81卷 42-63,I0003页

作者： Aditya Velidandi Pradeep kumar Gandam Madhavi Latha Chinta Srilekha Konakanchi Anji reddy Bhavanam Rama raju Baadhe Minaxi Sharma James Gaffey Quang D.Nguyen Vijai kumar Gupta Integrated Biorefinery Research Laboratory Department of BiotechnologyNational Institute of TechnologyWarangalTelangana 506004India Stem cell research laboratory Department of BiotechnologyNational Institute of TechnologyWarangalTelangana 506004India Department of Biotechnology Chaitanya University(Deemed to be University)WarangalTelangana 506001India Department of Chemical Engineering Dr.B.R.Ambedkar National Institute of Technology JalandharPunjab 144027India Haute Ecole Provinciale de Hainaut-Condorcet 7800 ATHBelgium Department of Applied Biology University of Science and TechnologyMeghalaya 793101India Circular Bioeconomy Research Group Shannon Applied Biotechnology CentreMunster Technological UniversityKerryIreland Department of Bioengineering and Alcoholic Drink Technology Institute of Food Science and TechnologyHungarian University of Agriculture and Life SciencesH-1118 BudapestḾenesiút 45Hungary Biorefining and Advanced Materials Research Center SRUCKings BuildingsWest Mains RoadEdinburgh EH93JGUK Department of Biotechnology Graphic Era Deemed to be UniversityDehradun 248002UttarakhandIndia

Machine learning(ML)has emerged as a significant tool in the field of biorefinery,offering the capability to analyze and predict complex processes with *** article reviews the current state of biorefinery and its classification,highlighting various commercially successful ***,we delve into different categories of ML models,including their algorithms and applications in various stages of biorefinery lifecycle,such as biomass characterization,pretreatment,lignin valorization,chemical,thermochemical and biochemical conversion processes,supply chain analysis,and life cycle *** benefits and limitations of each of these algorithms are discussed in ***,the article concludes with a discussion of the limitations and future prospects of ML in the field of biorefineries.

关键词： Biofuel Biomass characterization Biorefinery Life cycle assessment Machine learning Pretreatment

Use of the Max Ent model to predict changes in sloth bear(Melursus ursinus)habitats in the Gandaki River Basin,Nepal

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Journal of Mountain Science 2022年第7期19卷 1988-1997页

作者： raju RAI ZHANG Yi-li WANG Zhao-feng Basanta PAUDEL LIU Lin-shan Mohan kumar RAI Narendra Raj KHANAL Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China University of Chinese Academy of Sciences Beijing100049China Institute of Fundamental Research and Studies Kathmandu44600Nepal Kathmandu Center for Research and Education Chinese Academy of Sciences-Tribhuvan UniversityKirtipurKathmandu44613Nepal

The Gandaki River Basin(GRB),located in the central Himalaya,provides habitats for a large number of important flora and fauna *** habitats of key protected species have changed over time as a result of climate changes and human activities related to land use change,including the development of *** study assessed the present and future distributions of sloth bear(Melursus ursinus)habitats using the maximum entropy(Max Ent)*** data,a digital elevation model and roads were used as environmental layers to assess current and future distributions of *** show that the overall habitat within the study area is likely to undergo important changes in the *** 8(the mean temperature of the wettest quarter)and slope were found to be important variables affecting the distribution of the *** habitats very highly suitable for sloth bears currently cover an area of 148 km^(2) within the *** habitats are predicted to increase by 122 km^(2) more by ***,a net change by 680.38 km^(2) was found in the *** measures are necessary for this key protected species and its habitat within the GRB and elsewhere in Nepal.

关键词： Sloth bear Melursus ursinus Habitat prediction Max Ent Gandaki River Basin Himalays

Discretization of Complex Geometric Domain Through Computer-Based Stair-Step Representation Method for Estimating Water Levels Associated with A Storm

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China Ocean Engineering 2022年第5期36卷 791-801页

作者： Md.Mahabub Alam Gour Chandra Paul Irfan raju Foyjonnesa Farhana Zannat Eti Mst.Sharmin Banu Dipankar kumar Md.Emran Ali Department of Applied Mathematics Gono BishwabidyalayDhaka-1344Bangladesh Department of Mathematics University of RajshahiRajshahi-6205Bangladesh Department of Arts&Sciences Bangladesh Army University of Science and TechnologySaidpur-5310Bangladesh Department of Mathematics European University of BangladeshDhaka-1216Bangladesh Department of Mathematics Jashore University of Science and TechnologyJashore-7408Bangladesh Department of Mathematics Bangabandhu Sheikh Mujibur Rahman Science and Technology UniversityGopalganj 8100Bangladesh Department of Textile Engineering Northern University of BangladeshDhaka 1230Bangladesh

In this paper,an improvement has been made to the approximation technique of a complex domain through the stair-step approach to have a considerable accuracy,minimize computational cost,and avoid the hardship of manual work.A novel stair-step representation algorithm is used in this regard,where the entire procedure is carried out through our developed MATLAB *** C-grid is used in our approximation with(1/120)°grid *** a test case,the method is applied to approximate the domain covering the area between 15°-23°N latitudes and 85°-95°E longitudes in the Bay of *** with the approximation of the land-sea interface,coastal stations are also *** land-sea interfaces and coastal stations are found to be in good agreement with the actual ones based on the similarity index,overlap fraction,and extra fraction *** method can be used for approximating an irregular geometric domain to employ the finite difference method in solving problems related to long *** a test case,shallow water equations in Cartesian coordinates are solved on the domain of interest for simulating water levels due to the nonlinear tide-surge interaction associated with the storms April 1991 and AILA,2009 along the coast of *** same input except for the discretized domain and bathymetry as that of Paul et al.(2016)is used in our *** results are found to be in reasonable agreement with the observed data procured from Bangladesh Inland Water Transport Authority.

关键词： Arakawa C-grid Bay of Bengal coast of Bangladesh finite difference method shallow water equations stair-step representation

Extraction of a novel tanning agent from indigenous plant bark and its application in leather processing

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Journal of Leather Science and Engineering 2022年第1期4卷 253-267页

作者： raju kumar Das Al Mizan Fatema Tuj Zohra Sobur Ahmed Khondoker Shahin Ahmed Hemayet Hossain Institute of Leather Engineering and Technology(ILET) University of Dhaka44-50HazaribaghDhaka 1209Bangladesh Department of Leather Engineering Khulna University of Engineering&Technology(KUET)Khulna 9203Bangladesh Department of Leather Engineering Faculty of EngineeringEge University35100 BornovaIzmirTurkey BCSIR Laboratories Chemical Research DivisionBangladesh Council of Scientific and Industrial Research(BCSIR)DhanmondiDhaka 1205Bangladesh

The use of vegetable tanning materials in leather processing has drawn attention as an alternative to basic chromium sulphate for its natural abundance and environmental aspects. In this work, an attempt has been made to extract veg-etable tannins from Xylocarpus granatum bark using different solvents (e.g., water, methanol, ethanol, and chloroform) and compare with conventional vegetable tanning agents such as mimosa and quebracho. The highest extraction efficiency was observed 31.22% by methanol. The presence of tannin content and polyphenolic compounds, e.g. (-)epicatechin (503 mg/100 g dry extract), catechin hydrate (218 mg/100 g dry extract), catechol (29 mg/100 g dry extract) were ensured by UV-Vis, FT-IR spectroscopy and HPLC. Again, condensed tannins, moisture content, and pH of the methanol extracted tannin were found 47.80%, 5.82%, and 3.97 respectively. The leather tanned by Xylocar-pus granatum tannin showed a shrinkage temperature of 86.34 ± 1.52 °C. Other properties such as tensile strength, tear strength, grain cracking load, and distention at grain cracking were comparable to conventional vegetable- tanned leather. The cross-sectional morphology of the tanned leathers was also characterized by scanning electron microscopy (SEM) which revealed a compact structure of the leather fibers. In light of the findings from the study, X. granatum bark tannin could be a well alternative to chromium and a new source of vegetable tannin for the leather industry.

关键词： Vegetable tanning agent Strength properties Shrinkage temperature Chrome-free leather Alternative tannin Xylocarpus granatum

QoS Constrained Network Coding Technique to Data Transmission Using IoT

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Computer Systems Science & Engineering 2022年第11期43卷 531-544页

作者： A.Sathishkumar T.Rammohan S.Sathish kumar J.Uma K.Srujan raju Aarti Sangwan M.Sivachitra M.Prabu Department of ECE The Kavery Engineering CollegeMecheri636453TamilnaduIndia Department of EEE Karpagam College of EngineeringCoimbatore641032India Department of EEE M.Kumarasamy College of EngineeringKarur639113India Department of Computer Science and Engineering CMR Technical CampusHyderabad501401India Department of CST Manav Rachna UniversityFaridabad121004India Department of EEE Kongu Engineering CollegePerundurai638060India Department of EEE Nandha Engineering CollegePerunduraiTamilnadu638052India

The research work presents,constrained network coding technique to ensure the successful data transmission based composite channel cmos technology using dielectric *** charge fragmentation and charge splitting are two components of the filtered switch domino(FSD)*** behavior of selected switching is achieved using generator called conditional pulse generator which is employed in Multi Dynamic Node Domino(MDND)*** FSD and MDND technique need wide area compared to existing single nodekeeper domino *** aim of this research is to minimize dissipation of power and to achieve less consumption of *** proposed research,works by introducing the method namely Interference and throughput aware Optimized Multicast Routing Protocol(IT-OMRP).The main goal of this proposed research method is to introduce the system which can forward the data packets towards the destination securely and *** achieve the bandwidth and throughput in optimized data transmission,proposed multicast tree is selected by Particle Swarm Optimization which will select the most optimal host node as the branches of multi cast *** node selection is done by considering the objectives residual energy,residual bandwidth and *** node selection multi cast routing is done with the concern of interference to ensure the reliable and successful data *** case of transmission range size is higher than the coverage sense range,successful routing is ensured by selecting secondary host forwarders as a backup which will act as intermediate relay *** NS2 simulator is used to evaluate research outcome from which it is proved that the proposed technique tends to have increased packet delivery ratio than the existing work.

关键词： Multicast routing optimal node selection secondary relay nodes probability of interference residual energy bandwidth throughput

Defect induced room-temperature ferromagnetism and enhanced photocatalytic activity in Ni-doped ZnO synthesized by electrodeposition

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Chinese Physics B 2020年第10期29卷 566-572页

作者： Deepika raju kumar Ritesh kumar Kamdeo Prasad Yadav Pratyush Vaibhav Seema Sharma Rakesh kumar Singh Santosh kumar College o f Commerce Arts and SciencePatna.BiharIndia Jaypee University o f Engineering and Technology GunaMadhya PradeshIndia Anugrah Narayan College PatnaBiharIndia Aryabhatta Knowledge University PatnaBiharIndia

Zn0.90Ni0.10O nanoparticles have been synthesized by single-bath two-electrode electrodeposition at constant voltage. X-ray diffraction, UV vis and photoluminescence studies reveal that a single-phase polycrystalline hcp wurtzite crystal structure of ZnO is evolved. The material consists of a large number of defects such as oxygen vacancy (Ov) and zinc interstitial (Zi). The magnetization study reveals that the sample exhibits room-temperature global ferromagnetism and the ferromagnetic ordering seems to be defect induced via bound magnetic polaron mechanism, and double exchange is also expected to have played role. Interesting optoelectronic properties have been found in the synthesized sample and the material seems to be a potential candidate to be used as a UV sensor. Such a transition metal doped ZnO based dilute magnetic semiconducting system exhibiting room-temperature ferromagnetism is likely to be first of its kind in the sense that such materials have not yet been reported to be synthesized by the simple method of electrodeposition to the best of our knowledge on the basis of ample literature review.

关键词： dilute magnetic semiconductors(DMS) bound magnetic polaron photoluminescence ferromagnetism