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Vibrational resonance in a multistable system with position-dependent mass

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Communications in Theoretical Physics 2023年第11期75卷 115-134页

作者： T O roy-Layinde K A Omoteso O T Kolebaje F O Ogunmefun R A Fasasi J A Laoye U E Vincent Department of Physics Olabisi Onabanjo UniversityAgo-IwoyeOgun StateNigeria Department of Physics Adeyemi Federal University of EducationOndoNigeria Department of Physical Sciences Redeemer’s UniversityP.M.B.230EdeNigeria Department of Physics Lancaster UniversityLancaster LA14 YBUnited Kingdom

The occurrence of vibrational resonance(VR)in a dual-frequency-driven multistable system with a spatially varying mass modelling particle with position-dependent mass(PDM)and evolving in a one-dimensional symmetric periodic potential has been investigated and reported in this *** numerically compute and analyze the response amplitude,the effects of the PDM parameters(m0,a)on the potential structure,the occurrence of VR and the bifurcation of the equilibrium *** is shown that the PDM parameters,besides controlling VR,can induce unconventional resonance patterns through the variation of the potential well *** resonant states can be influenced through the cooperation of the PDM parameters and the external forcing leading the system from multiresonance state into single and double resonance *** contributions of the fixed rest mass m0 on the VR and the PDM-induced resonance are determined by threshold conditions imposed by the magnitude of the mass nonlinear strength a.

关键词： vibrations resonance position-dependent mass multistable oscillator dualfrequency force nonlinear systems

Water quality prediction of copper-molybdenum miningbeneficiation wastewater based on the PSO-SVR model

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Frontiers of Environmental Science & Engineering 2023年第8期17卷 81-94页

作者： Xiaohua Fu Qingxing Zheng Guomin Jiang Kallol roy Lei Huang Chang Liu Kun Li Honglei Chen Xinyu Song Jianyu Chen Zhenxing Wang Ecological Environment Management and Assessment Center Central South University of Forestry and TechnologyChangsha 410004China State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control South China Institute of Environmental SciencesMinistry of Ecology and EnvironmentGuangzhou 510655China Chinese Non-Ferrous Industrial Engineering Center of Pollution Control Technology&Equipment Science Environment Protection Co.Ltd.Changsha 410036China Institute of Computer Science University of TartuTartu 51009Estonia School of Environmental Science and Engineering Guangzhou UniversityGuangzhou 510006China A.b Freeman School of business Tulane UniversityNew OrleansLA 70118USA Guangzhou Huacai Environmental Protection Technology Co. Ltd.Guangzhou 511480China

The mining-beneficiation wastewater treatment is highly complex and *** factors like influent quality,flow rate,pH and chemical dose,tend to restrict the effluent effectiveness of miningbeneficiation wastewater *** oxygen demand(COD)is a crucial indicator to measure the quality of mining-beneficiation *** COD concentration accurately of miningbeneficiation wastewater after treatment is essential for achieving stable and compliant *** reduces environmental risk and significantly improves the discharge quality of *** paper presents a novel AI algorithm PSO-SVR,to predict water *** optimization of our proposed model PSO-SVR,uses particle swarm optimization to improve support vector regression for COD *** generalization capacity tested on out-of-distribution(OOD)data for our PSOSVR model is strong,with the following performance metrics of root means square error(RMSE)is 1.51,mean absolute error(MAE)is 1.26,and the coefficient of determination(R2)is *** compare the performance of PSO-SVR model with back propagation neural network(bPNN)and radial basis function neural network(RbFNN)and shows it edges over in terms of the performance metrics of RMSE,MAE and R2,and is the best model for COD prediction of mining-beneficiation *** is because of the less overfitting tendency of PSO-SVR compared with neural network *** proposed PSO-SVR model is optimum for the prediction of COD in copper-molybdenum mining-beneficiation wastewater *** addition,PSO-SVR can be used to predict COD on a wide variety of wastewater through the process of transfer learning.

关键词： Chemical oxygen demand Mining-beneficiation wastewater treatment Particle swarm optimization Support vector regression Artificial neural network

The leaf extracts of Camellia sinensis (green tea) ameliorate sodium fluoride-induced oxidative stress and testicular dysfunction in rats

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Asian pacific Journal of Reproduction 2020年第6期9卷 267-274页

作者： Dibyendu Ray Sunidhi roy Pradip Panda Partha Nandi Sandip Mukherjee Subrata Ghosh Department of Physiology Serampore CollegeSeramporeHooghly-712201West BengalIndia Department of Statistics Serampore CollegeSeramporeHooghlyW.B.India Government General Degree College LalgarhJhargramWest BengalIndia Department of Physiology Hooghly Mohsin College(PG Section)HooghlyW.B.Pin 712101India

Objective:To investigate the effect of Camellia(C.)sinensis in mitigating oxidative damage and reproductive toxicity in testis induced by sodium fluoride in a rat ***:Twenty-four adult male Wister rats were divided into 4 groups,with 6 rats in each *** 1 orally received distilled water(1 mL/100 g body weight)daily and served as the control group,while group 2 received drinking water with 100 ppm sodium fluoride per day for 21 consecutive days,group 3 was administered with only *** extract by gavage at a dose of 100 mg/kg body weight and group 4 received drinking water with 100 ppm sodium fluoride and 100 mg/kg body weight *** leaf extract per day for 21 consecutive *** the end of the treatment,the rats were sacrificed under light ether *** gonado-somatic index,sperm count and motility,serum level of luteinizing hormone and testosterone were *** peroxidation[malondialdehyde(MDA)level],nitric oxide(NO)production,and activities of antioxidant enzymes-superoxide dismutase(SOD),catalase,and reduced glutathione level(GSH)were also ***:Sodium fluoride treatment significantly decreased gonado-somatic index,sperm count and motility as well as the serum level of luteinizing hormone and testosterone(Pbules,along with enhanced interstitial space and a reduced number of Leydig *** was a highly significant increase in NO and MDA production(Pbably because of its antioxidant property.

关键词： Oxidative stress Testicular damage Camellia sinensis Antioxidant Sodium fluoride

基于优先模糊目标规划方法的多目标交通模型研究(英文)

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交通运输系统工程与信息 2008年第3期8卷 40-48页

作者： PRAMANIK Surapati roy Tapan Kumar Department of Mathematics Nandalal Ghosh B.T.College印度西孟加拉743126 bengal Engineefing and Science Univesity 印度西孟加拉711103

针对具有模糊因数的多目标交通问题,提出了一种优先模糊目标规划方法.本文首先建立了模糊目标的隶属度函数,其次,将隶属度函数的最大值作为期望基准并引入了偏差变量,从而将隶属度函数转化为隶属度目标.通过最小化负偏差变量得到最满意... 详细信息

针对具有模糊因数的多目标交通问题,提出了一种优先模糊目标规划方法.本文首先建立了模糊目标的隶属度函数,其次,将隶属度函数的最大值作为期望基准并引入了偏差变量,从而将隶属度函数转化为隶属度目标.通过最小化负偏差变量得到最满意解.对模糊目标不同优先级结构下的解进行了敏感性分析,并用欧氏距离函数确定了最佳的目标优先级结构,通过最小化后悔值达到决策区域理想点决策值,得到决策单元最满意解.最后,应用实例对本文方法进行了分析验证.

关键词：模糊目标规划模糊数隶属函数多目标决策多目标交通问题

basic Study Hepatitis b virus detected in paper currencies in a densely populated city of India: A plausible source of horizontal transmission?

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World Journal of Hepatology 2020年第10期12卷 775-791页

作者： Palashpriya Das Ruchi Supekar Ritika Chatterjee Subrata roy Anisa Ghosh Subhajit biswas Infectious Diseases and Immunology Division Council of Scientific and Industrial Research-Indian Institute of Chemical BiologyKolkata PIN-700032West BengalIndia Infectious Diseases&Immunology Division Indian Institute of Chemical Biology(Council of Scientific and Industrial Research)Kolkata 700032West BengalIndia

bACKGROUND The recent rise in the incidence of hepatitis b virus(HbV)infections in a densely populated city of eastern India(“mixing vessel”of people of varied socioeconomic and immune status)prompted this *** saliva on fingers for enumerating bank notes is a common practice in the Indian *** notes may be a potential source of“horizontal”transmission of this virus,especially if there are cuts/bruises on the oral mucous membrane or *** To investigate whether paper currencies could be a plausible mode of horizontal transmission of HbV *** Polymerase chain reactions(PCR)followed by nucleotide sequencing was done for the detection of *** b virus surface antigen enzyme-linked immunosorbent assay(HbsAg ELISA)was performed on all HbV deoxyribonucleic acid-positive samples to check the detectability of the *** force microscopy(AFM)was carried out for visual confirmation of HbV particles in ultracentrifuged/immunoprecipitated samples from currency paper *** HbV-specific PCRs on pellets obtained after ultracentrifugation/immunoprecipitation of the currency paper washings detected potentially intact/viable HbV(genotype D2)in 7.14%of samples(n=70).AFM gave the visual confirmation of HbV particles in ultracentrifuged/immunoprecipitated samples from currency paper ***,HbV isolates from the currency notes could not be detected by HbsAg *** It is a common practice in the Indian subcontinent to count paper currencies by applying saliva on *** notes may be a potential source of“horizontal”transmission of this virus,especially if there are cuts/bruises on the oral mucous membrane or skin,but it was practically not possible to demonstrate experimentally such *** of potentially intact/viable and“occult”HbV from currency poses potential risk of silent transmission of this virus among the general population.

关键词： Hepatitis b virus Contamination Paper currencies Occult hepatitis b virus Hepatitis b virus surface antigen enzyme-linked immunosorbent assay Horizontal transmission

Productivity, quality and soil health as influenced by lime in ricebean cultivars in foothills of northeastern India

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The Crop Journal 2014年第5期2卷 338-344页

作者： Rakesh Kumar Dibyendu Chatterjee Narendra Kumawat Avinash Pandey Aniruddha roy Manoj Kumar ICAR Research Complex for NEH Region Nagaland CentreJharnapani Medziphema Nagaland 797 103 India Senior Research Fellow Agricultural Research Station SK Rajasthan Agricultural UniversityBikaner Rajasthan 334 006 India ICAR Research Complex for NEH Region Umiam Meghalaya 793 103 India

To evaluate the response to lime on cultivars of ricebean(Vigna umbellata), a field experiment was conducted during the two consecutive rabi seasons of 2010–2011 and 2011–2012 in the Nagaland foothills, India. The experiment used a split-plot design with four levels of lime(control, 0.2, 0.4and 0.6 t ha-1) in main plots and four ricebean cultivars(RbS-16, RbS-53, PRR-2, and RCRb-4) in sub-plots with three replicates. The results revealed that increasing levels of lime(in the furrow)from 0 to 0.6 t ha-1significantly increased growth, yield attributes and yield. The quality parameters of ricebean were also influenced significantly by the application of lime. Maximum gross return(INR 39,098 ha-1), net return(INR 27,281 ha-1), benefit:cost(b:C) ratio(2.29),production efficiency, and economic efficiency were also realized with the application of lime at 0.6 t ha-1. Among the ricebean cultivars, RbS-53 produced significantly higher growth, yield attributes, grain yield, straw yield, biological yield, and harvest index. Similarly, yield and protein content were higher in RbS-53. Maximum gross return, net return, b:C ratio, production efficiency, and economic efficiency were observed for RbS-53.

关键词： Economics Lime application Ricebean Response curve Yield attributes

Hydrophilic bi-functional b-doped g-C_(3)N_(4) hierarchical architecture for excellent photocatalytic H_(2)O_(2) production and photoelectrochemical water splitting

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Journal of Energy Chemistry 2022年第7期31卷 236-247,I0007页

作者： Yang Ding Soumyajit Maitra Chunhua Wang Runtian Zheng Meiyu Zhang Tarek barakat Subhasis roy Jing Liu Yu Li Tawfique Hasan bao-Lian Su Laboratory of Inorganic Materials Chemistry(CMI) University of Namur61 rue de BruxellesB-5000 NamurBelgium Namur Institute of Structured Matter(NISM) University of Namur61 rue de BruxellesB-5000 NamurBelgium Department of Chemical Engineering University of Calcutta92 APC RoadWest BengalKolkata 700009India Department of Chemistry KU LeuvenCelestijnenlaan 200FB-3001 LeuvenBelgium State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000GansuChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Cambridge Graphene Centre University of CambridgeCambridgeCB30DSUK Clare Hall University of CambridgeUnited KingdomCB21EWUK

Graphitic carbon nitride(g-C_(3)N_(4))has attracted great interest in photocatalysis and ***,their poor hydrophilicity poses a great challenge for their applications in aqueous ***,we demonstrate synthesis of a hydrophilic bi-functional hierarchical architecture by the assembly of b-doped g-C_(3)N_(4)*** hierarchical b-doped g-C_(3)N_(4)material enables full utilization of their highly enhanced visible light absorption and photogenerated carrier separation in aqueous medium,leading to an excellent photocatalytic H_(2)O_(2)production rate of 4240.3μM g^(-1)h^(-1),2.84,2.64 and 2.13 times higher than that of the bulk g-C_(3)N_(4),g-C_(3)N_(4)nanoplatelets and bulk b doped g-C_(3)N_(4),*** based on these hierarchical architectures can generate an unprecedented photocurrent density of 1.72 m A cm^(-2)at 1.23 V under AM 1.5 G illumination for photoelectrochemical water *** work makes a fundamental improvement towards large-scale exploitation of highly active,hydrophilic and stable metal-free g-C_(3)N_(4)photocatalysts for various practical applications.

关键词： boron doping Hydrophilicity Hierarchically assembled architectures Photocatalytic H_(2)O_(2)production Photoelectrocatalytic water splitting

beta-glucan protects against isoproterenol-induced cardiac remodeling by regulating the ACE-AT1R axis and attenuates cardiac inflammation and apoptosis

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Asian Pacific Journal of Tropical biomedicine 2023年第9期13卷 384-392页

作者： Anitha roy Vasantha Mallenahalli Neelakantappa Jayashree Ganesan balakrishnan Ramajayam Asokan Srinivasan Kulandaivel V.V.Sathibabu Uddandrao Sengottuvelu Singaravel Center for Transdisciplinary Research Department of PharmacologySaveetha Dental College and HospitalsSaveetha Institute of Medical and Technical SciencesChennaiTamil NaduIndia-600077 Department of Pharmacology Kasturba Medical CollegeMangoloreManipal Academy of Higher EducationManipalIndia-5750013 Department of Pharmacology Aarupadai Veedu Medical College&HospitalVinayaka Mission Research FoundationPuducherryIndia-607403 Department of Pharmaceutical Chemistry Nandha College of PharmacyErodeTamilnaduIndia-638052 Department of biochemistry K.S.Rangasamy College of Arts and Science(Autonomous)TiruchengodeNamakkal DistrictTamilnaduIndia-637215 Department of Pharmacology Nandha College of PharmacyErodeTamil NaduIndia-638052

Objective:To investigate the cardioprotective effect of beta-glucan against isoproterenol-induced cardiotoxicity in rats,and elucidate the underlying ***:Rats were orally pretreated with beta-glucan(40 mg/kg body weight)for 30 d,and isoproterenol(20 mg/100 g body weight)was administered on days 31 and *** effects of beta-glucan on markers of cardiac injury,hemodynamic changes,production of proinflammatory cytokines,and the corresponding mRNA expressions were *** addition,histological analysis was ***:Pretreatment with beta-glucan prevented isoproterenol-induced cardiac injury by preserving the structural and functional integrity of the plasma membrane and attenuating the production of proinflammatory cytokines(NF-κb,TNF-α,IL-6,IL-1β,and IFN-γ)in the ***,beta-glucan significantly downregulated the mRNA expression of ACE,AT1R,TNF-α,IL-6,NF-κb,caspase-3,TLR-4,and bax,and upregulated bcl-2 in the *** the same time,pretreatment with beta-glucan alleviated myocardial damage as reflected in a reduction in myonecrosis,edema,and erythrocyte extravasation with almost imperceptible ***:beta-glucan can protect against isoproterenol-induced cardiotoxicity by attenuating cardiac inflammation and apoptosis and regulating the ACE-AT1R axis,thereby preventing cardiac remodeling.

关键词： Βeta-glucan Isoproterenol Cardiac inflammation Cardiac apoptosis Cardiovascular diseases Heart failure Myocardial infarction

A robust carbon coating of Na_(3)V_(2)(PO_(4))_(3)cathode material for high performance sodium-ion batteries

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Chinese Chemical Letters 2021年第11期32卷 3570-3574页

作者： Liying Shen Yong Li Swagata roy Xiuping Yin Wenbo Liu Shanshan Shi Xuan Wang Xuemin Yin Jiujun Zhang Yufeng Zhao College of Sciences&Institute for Sustainable Energy Shanghai UniversityShanghai 200444China

Na_(3)V_(2)(PO_(4))_(3)is a very prospective sodium-ion batteries(SIbs)electrode material owing to its NASICON structure and high reversible ***,on account of its intrinsic poor electronic conductivity,Na_(3)V_(2)(PO_(4))_(3)electrode materials confront with some significant limitations like poor cycle and rate performance which inhibit their practical applications in the energy ***,a simple two-step method has been implemented for the successful preparation of carbon-coated Na_(3)V_(2)(PO_(4))_(3)*** synthesized sample shows a remarkable electrochemical performance of 124.1 mAh/g at 0.1 C(1 C=117.6 mA/g),retaining 78.5 mAh/g under a high rate of 200 C and a long cycle-performance(retaining 80.7 mAh/g even after 10000 cycles at 20 C),outperforming the most advanced cathode materials as reported in literatures.

关键词： Sodium-ion batteries NASICON Na_(3)V_(2)(PO_(4))_(3) Cathode Carbon-coated