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Geoscience Frontiers 2021年第5期12卷 327-341页

作者： sumit Das Amitesh Gupta Department of Geography Savitribai Phule Pune UniversityPune 411007India Marine and Atmospheric Science Department Indian Institute of Remote Sensing(ISRO)DehradunIndia Department of Remote Sensing and GIS JIS UniversityKolkataIndia

The Subarnarekha River in east India experiences frequent high magnitude flooding in monsoon *** this study,we present an in-depth analysis of flood hydrology and GIS-based flood susceptibility mapping of the entire *** 40 years of annual peak discharge data,historical cross-sections of different gauging sites,and 12 flood conditioning factors were *** flood susceptibility mapping followed an expert knowledge-based multi-parametric analytical hierarchy process(AHP)and optimized AHP-VIP *** hydrology data indicated more than 5 times higher discharge contrasted with the mean streamflow of the peak monsoon month in all hydro-monitoring stations that correspond to possible overbank flooding in the shallow semi-alluvial reaches of the Subarnarekha *** ratio revealed continuous changes on the channel cross-sections at decadal scale in all gauging *** flood susceptibility map through optimized AHP-VIP method showed a great amount of areas(38%)have a high probability of flooding and demands earnest attention of administrative *** AHP-VIP based flood susceptibility map was theoritically validated through AUC approach and it showed fairly high accuracy(AUC=0.93).Our study offers an exceptionally cost and time effective solution to the flooding issues in the Subarnarekha basin.

关键词： Flood susceptibility AHP GIS Discharge Subarnarekha India

A comprehensive review and analysis of solar forecasting techniques

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Frontiers in Energy 2022年第2期16卷 187-223页

作者： Pardeep SINGLA Manoj DUHAN sumit SAROHA Department of ECE Deenbandhu Chhotu Ram University of Science and TechnologyMurthalSonepat 131039India Department of Printing Technology(Electrical Engineering) Guru Jambheshwar University of Science and TechnologyHisar 125001India

In the last two decades,renewable energy has been paid immeasurable attention to toward the attainment of electricity requirements for domestic,industrial,and agriculture *** forecasting plays a vital role in smooth operation,scheduling,and balancing of electricity production by standalone PV plants as well as grid interconnected solar PV *** models and techniques have been developed in short,mid and long-term solar *** paper analyzes some of the potential solar forecasting models based on various methodologies discussed in literature,by mainly focusing on investigating the influence of meteorological variables,time horizon,climatic zone,pre-processing techniques,air pollution,and sample size on the complexity and accuracy of the *** make the paper reader-friendly,it presents all-important parameters and findings of the models revealed from different studies in a tabular mode having the year of publication,time resolution,input parameters,forecasted parameters,error metrics,and *** literature studied showed that ANN-based models outperform the others due to their nonlinear complex problem-solving *** accuracy can be further improved by hybridization of the two models or by performing pre-processing on the input ***,it also discusses the diverse key constituents that affect the accuracy of a *** has been observed that the proper selection of training and testing period along with the correlated dependent variables also enhances the accuracy of the model.

关键词： forecasting techniques hybrid models neural network solar forecasting error metric support vector machine(SVM)

THE GENERALIZED HYPERSTABILITY OF GENERAL LINEAR EQUATION IN QUASI-2-BANACH SPACE

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Acta Mathematica Scientia 2022年第4期42卷 1357-1372页

作者： Ravinder Kumar SHARMA sumit CHANDOK School of Mathematics Thapar Institute of Engineering and TechnologyPatiala-147004India

In this paper,we study the hyperstability for the general linear equation f(ax+by)=Af(x)+Bf(y)in the setting of complete quasi-2-Banach *** first extend the main fixed point result of Brzdek and Ciepliński(Acta Mathematica Scientia,2018,38 B(2):377-390)to quasi-2-Banach spaces by defining an equivalent quasi-2-Banach *** we use this result to generalize the main results on the hyperstability for the general linear equation in quasi-2-Banach *** results improve and generalize many results of literature.

关键词： Hyperstability quasi-2-Banach spaces fixed point general linear equation

Evaluation of factors affecting the edge formability of two hot rolled multiphase steels

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International Journal of Minerals,Metallurgy and Materials 2018年第2期25卷 199-215页

作者： Monideepa Mukherjee sumit Tiwari Basudev Bhattacharya Research and Development TATA STEELJamshedpur 831001India PSG College of Technology Coimbatore 641004India

In this study, the effect of various factors on the hole expansion ratio and hence on the edge formability of two hot rolled multiphase steels, one with a ferrite–martensite microstructure and the other with a ferrite-bainite microstructure, was investigated through systematic microstructural and mechanical characterization. The study revealed that the microstructure of the steels, which determines their strain hardening capacity and fracture resistance, is the principal factor controlling edge formability. The influence of other factors such as tensile strength, ductility, anisotropy, and thickness, though present, are secondary. A critical evaluation of the available empirical models for hole expansion ratio prediction is also presented.

关键词： stretch flanging hole expansion ratio martensite bainite edge formability multiphase steels

Mechanical properties and thermal conductivity of pristine and functionalized carbon nanotube reinforced metallic glass composites:A molecular dynamics approach

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Defence Technology（防务技术） 2021年第1期17卷 234-244页

作者： sumit Sharma S.K.Tiwari Sagar Shakya Department of Mechanical Engineering Dr.B.R.Ambedkar National Institute of TechnologyJalandharIndia

This work uses the molecular dynamics approach to study the effects of functionalization of carbon nanotubes(CNTs)on the mechanical properties of Cu64Zr36 metallic glass(MG).Three types of functional groups,carboxylic,vinyl and ester were *** effect of CNT volume fraction(Vf)and the number of functional groups attached to CNT,on the mechanical properties and thermal conductivity of CNT-MG composites was analysed using Biovia Materials *** lower values of Vf(from 0 to 5%),the percentage increase in Young’s modulus was approximately 66%.As the value of Vf was increased further(from 5 to 12%),the rate of increase in Young’s modulus was reduced to 16%.The thermal conductivity was found to increase from 1.52 W/mK at Vf?0%to 5.88 W/mK at Vf?12%,thus giving an increase of approximately 286%.Functionalization of SWCNT reduced the thermal conductivity of the SWCNT-MG composites.

关键词： Molecular dynamics Carbon nanotube Metallic glass Mechanical properties Thermal conductivity

Neuroprotective potential of Quercetin in combination with piperine against 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced neurotoxicity

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Neural Regeneration Research 2017年第7期12卷 1137-1144页

作者： Shamsher Singh sumit Jamwal Puneet Kumar Department of Pharmacology I.S.F College of Pharmacy Ferozepur Road Moga Punjab India I.K. Gujral Punjab Technical University Jalandhar Punjab India

1-Methy-4-phenyl-1,2,3,6-tetrahydropyridine（MPTP）is a neurotoxin that selectively damages dopaminergic neurons in the substantia nigra pars compacta and induces Parkinson＇s like symptoms in ***（QC）is a natural polyphenolic bioflavonoid with potent antioxidant and anti-inflammatory properties but lacks of clinical attraction due to low oral *** is a well established bioavailability enhancer used pre-clinically to improve the bioavailability of antioxidants（e.g.,Quercetin）.Therefore,the present study was designed to evaluate the neuroprotective potential of QC together with piperine against MPTP-induced neurotoxicity in ***（100μg/μL/rat,bilaterally）was injected intranigrally on days 1,4 and 7 using a digital stereotaxic ***（25 and 50 mg/kg,intragastrically）and QC（25 mg/kg,intragastrically）in combination with piperine（2.5 mg/kg,intragastrically）were administered daily for 14 days starting from day 8 after the 3^（rd） injection of *** day 22,animals were sacrificed and the striatum was isolated for oxidative stress parameter（thiobarbituric acid reactive substances,nitrite and glutathione）,neuroinflammatory cytokine（interleukin-1β,interleukin-6,and tumor necrosis factor-α）and neurotransmitter（dopamine,norepinephrine,serotonin,gamma-aminobutyric acid,glutamate,3,4-dihydroxyphenylacetic acid,homovanillic acid,and 5-hydroxyindoleacetic acid）*** infusion of MPTP into substantia nigra pars compacta led to significant motor deficits as evidenced by impairments in locomotor activity and rotarod performance in open field test and grip strength and narrow beam walk *** QC（25 and 50 mg/kg）and QC（25 mg/kg）in combination with piperine（2.5 mg/kg）,in particular the combination therapy,significantly improved MPTP-induced behavioral abnormalities in rats,reversed the abnormal alterations of neurotransmitters in the striatum,and alleviated oxidative stress and inflammatory response in the *** f

关键词： nerve regeneration 1-methy-4-phenyl-1,2,3,6-tetrahydropyridine Quercetin Piperine Parkinson'sdisease excitotoxicity oxido-nitrosative stress neurotransmitters neural regeneration

Impact of Cumulative Exposure to Circulating Ovarian Sex Hormones on Increasing the Risk of Hormone Receptor-Positive Breast Cancer

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Journal of Bio-X Research 2024年第1期7卷 36-43页

作者： Swati Sucharita Mohanty sumit Subhadarshi Mohanty Soumya Surath Panda Chita Ranjan Sahoo Prafulla Kumar Mohanty Rabindra Nath Padhy Siksha O Anusandhan University Institute of Medical Sciences and SUM Hospital BhubaneswarOdishaIndia Regional Medical Research Centre Bhubaneswar BhubaneswarOdishaIndia Khallikote Unitary University BrahmapurOdishaIndia

There were 2.3 million new cases of breast cancer registered in 2020,establishing it as the world’s leading *** regular exposure of breast cells to circulating ovarian sex hormones may contribute to cancer growth at all stages.A literature review was performed by downloading research articles from PubMed Central,with keywords such as breast cancer,hormone exposure in breast cancer,estrogen/progesterone exposure in breast cancer,and breast cancer risk *** breast cancer is a hormone-related disease,several factors that influence hormonal conditions or are indicators of alterations in hormonal conditions have been linked with the risk for breast ***,an elevated risk for breast cancer has been related to reproductive history and exogenous estrogen exposure because they may amplify lifetime estrogen *** these factors address the total cumulative exposure to circulating ovarian sex hormones that a female is vulnerable to in her lifetime.A healthy lifestyle,a more extended breastfeeding period,and regular physical activity may help lower one’s *** review summarizes the factors that increase the risk of estrogen/progesterone(hormone receptor)receptor-positive breast cancer due to overall cumulative estrogen exposure,with an understanding of estrogen biosynthesis mechanisms and estrogen receptor signaling.

关键词： alterations elevated exposure

A Constant Gain and Miniaturized Antipodal Vivaldi Antenna for 5G Communication Applications

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Computers, Materials & Continua 2022年第12期73卷 4909-4921页

作者： Amruta SDixit sumit Kumar Shabana Urooj Symbiosis Institute of Technology Symbiosis International(Deemed University)Pune412115India Department of Electrical Engineering College of EngineeringPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia

This paper proposes a stable gain and a compact Antipodal Vivaldi Antenna(AVA)for a 38GHz band of 5G communication.A novel compact AVA is designed to provide constant gain,high front to back ratio(FBR),and very high *** performance of the proposed AVA is enhanced with the help of a dielectric lens(DL)and corrugations.A rectangular-shaped DL is incorporated in conventional AVA(CAVA)to enhance its gain up to 1 dBi and the bandwidth by 1.8 ***,the rectangular corrugations are implemented in CAVA with lens(CAVA-L)to further improve the gain and *** proposed AVA with lens and corrugations(AVA-LC)gives a constant and high gain of 8.2 to 9 *** designed AVA-LC operates from 34 to 45GHz frequency which covers 38GHz(37.5 to 43.5 GHz)band of 5G ***,the presented AVA-LC mitigates the back lobe and sidelobe levels,resulting in FBR and efficiency *** FBR is in the range of 12.2 to 22 dB,and efficiency is 99%,almost *** AVA-LC is fabricated on Roger’s RT/duroid 5880 substrate,and it is tested to verify the simulated *** proposed compact AVA-LC with high gain,an improved FBR,excellent efficiency,and stable radiation patterns is suitable for the 38GHz band of 5G devices.

关键词： Antipodal Vivaldi Antenna(AVA) constant gain dielectric lens(DL) 5G communication corrugations front to back ratio(FBR)

MOLECULAR DYNAMICS SIMULATION OF POLYMER/CARBON NANOTUBE COMPOSITES

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Acta Mechanica Solida Sinica 2015年第4期28卷 409-419页

作者： sumit Sharma Rakesh Chandra Pramod Kumar Navin Kumar Department of Mechanical Engineering Dr.B.R.Ambedkar National Institute of Technology School of Mechanical Materials & Energy Engineering (SMMEE) Indian Institute of Technology

In this paper, we present classical molecular dynamics （MD） simulations of model polymer/CNT composites constructed by embedding a single wall （10,10） CNT into two different amorphous polymer matrices： poly（methyl methacrylate） and poly{（m-phenylene-vinylene）-co- [（2,5-dioctoxy-p-phenylene） vinylene]}, respectively, with different volume fractions. The simulation results support the idea that it is possible to use CNTs to mechanically reinforce an appropri- ate polymer matrix, especially in the longitudinal direction of the nanotube. The comparison of the simulation results with the macroscopic rule-of-mixtures for composite systems showed that for strong interfacial interactions, there can be large deviations of the results from the rule-of- mixtures. In order to verify this study, results obtained have been compared with those given by Elliott and Han （2007）.

关键词： nano-structures elasticity mechanical properties computational modeling

INFLUENCE OF RIGID BOUNDARY ON THE LOVE WAVE PROPAGATION IN ELASTIC LAYER WITH VOID PORES

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Acta Mechanica Solida Sinica 2013年第5期26卷 551-558页

作者： sumit Kumar Vishwakarma Shishir Gupta Dinesh Kumar Majhi Department of Applied Mathematics Indian School of Mines Department of Mathematics Birla Institute of Technology and Science

In this paper, a mathematical model for Love wave propagation in a porous elastic layer under a rigid boundary resting over a poro-elastic half-space has been developed. The study shows that such a medium transmits two types of Love waves. The first front depends on the change in volume fraction of the pores whereas the second front depends upon the modulus of rigidity of the elastic matrix of the medium and is the same as the Love wave in an elastic layer over an elastic half-space. It is observed that the first front is many times faster than the shear wave in the medium with void pores due to the change in the volume fraction of the pores and is significant.

关键词： Love waves void pores volume fraction rigid boundary wave front