检索结果-南通市图书馆

Exploring Deep Learning Methods for Computer Vision Applications across Multiple Sectors:Challenges and Future Trends

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第4期139卷 103-141页

作者： Narayanan Ganesh Rajendran Shankar Miroslav Mahdal Janakiraman SenthilMurugan Jasgurpreet Singh Chohan kanak kalita School of Computer Science and Engineering Vellore Institute of TechnologyChennai600127India Department of Computer Science and Engineering Koneru Lakshmaiah Education FoundationVaddeswaram522502India Department of Control Systems and Instrumentation Faculty of Mechanical EngineeringVSB-Technical University of OstravaOstrava70800Czech Republic Department of Computer Science and Engineering Vel Tech High Tech Dr.Rangarajan Dr.Sakunthala Engineering CollegeChennai600062India Department of Mechanical Engineering and University Centre for Research&Development Chandigarh UniversityMohali140413India Department of Mechanical Engineering Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and TechnologyAvadi600062India

Computer vision(CV)was developed for computers and other systems to act or make recommendations based on visual inputs,such as digital photos,movies,and other *** learning(DL)methods are more successful than other traditional machine learning(ML)methods *** techniques can produce state-of-the-art results for difficult CV problems like picture categorization,object detection,and face *** this review,a structured discussion on the history,methods,and applications of DL methods to CV problems is *** sector-wise presentation of applications in this papermay be particularly useful for researchers in niche fields who have limited or introductory knowledge of DL methods and *** review will provide readers with context and examples of how these techniques can be applied to specific areas.A curated list of popular datasets and a brief description of them are also included for the benefit of readers.

关键词： Neural network machine vision classification object detection deep learning

Defect mediated losses and degradation of perovskite solar cells:Origin impacts and reliable characterization techniques

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第7期94卷 217-253页

作者： Himangshu Baishy Ramkrishna Das Adhikari Mayur Jagdishbhai Patel Deepak Yadav Tapashi Sarmah Mizanur Alam Manab kalita Parameswar krishnan lyer Centre for Nanotechnology Indian Institute of Technology GuwahatiGuwahati 781039AssamIndia Department of Chemistry Indian Institute ofTechnology GuwahatGuwahati739AssamIndi

The rapid advancement of halide-based hybrid perovskite materials has garnered significant research attention,particularly in the domain of photovoltaic *** to their exceptional optoelec-tronic properties,they demonstrated power conversion efficiency(PcE)of over 25%in single junction solar *** the notable progress in PCE over the past decade,the inherent high defect density pre-senting in perovskite materials gives rise to several loss mechanisms and associated ion migration in per-ovskite solar cells(PsCs)during operational *** factors collectively contribute to a significant stability challenge in PsCs,placing their longevity far behind for *** numerous reports have explored defects,ion migration,and their impacts on device performance,a com-prehensive correlation between the types of defects and the degradation kinetics of perovskite materials and PsCs has been *** this context,this review aims to provide a comprehensive overview of the origins of defects and ion migration,emphasizing their correlation with the degradation kinetics of per-ovskite materials and PsCs,leveraging reliable characterization ***,these charac-terization techniques are intended to comprehend loss mechanisms by different passivation approaches to enhance the durability and PCE of PSCs.

关键词： Perovskite solar cells Defects lon migration Degradation Stability

在线全文

学校读者我要写书评

暂无评论

浅层排水系统降雨过程氮磷垂直迁移数值仿真

哈尔滨工业大学学报 2017年第2期49卷 44-48页

作者：李世阳王立 prasanta.k.kalita 马放城市水资源与水环境国家重点实验室(哈尔滨工业大学) 哈尔滨150090 伊利诺伊大学香槟分校农业与生物技术工程学院美国illinois61802

浅层排水系统是一种快速排出农田积水的有效设施,但其同时也改变了水分及面源污染物如氮磷在农田系统迁移的速度和途径.为了对浅层排水农田系统中的氮磷垂直迁移过程有全面了解,利用有限元分析技术对已监测的浅层排水系统单元土壤柱进... 详细信息

浅层排水系统是一种快速排出农田积水的有效设施,但其同时也改变了水分及面源污染物如氮磷在农田系统迁移的速度和途径.为了对浅层排水农田系统中的氮磷垂直迁移过程有全面了解,利用有限元分析技术对已监测的浅层排水系统单元土壤柱进行数值仿真.结果表明,在5 h 4 mm/h降雨结束后,降雨量没有达到使地表到排水管道之间土壤层完全饱和,从而使随之溶解的氮磷污染物不足以渗透到排水管,导致没有氮磷的流失.降雨时间延长至10 h后,降雨量使土壤层达到饱和,从而使溶解的污染物产生流失,其中硝酸盐的流失量明显大于磷酸盐,硝酸盐流失量为9~10 mg/L,磷酸盐流失量为0.05~0.1 mg/L.在24 h降雨事件后,排水管中硝酸盐质量分数达最大值.在降雨时间不断增加的过程中,硝酸盐流失呈指数增长,而磷酸盐只是线性增长,形成该现象的原因与污染物的本身性质有关.

关键词：浅层排水系统面源污染垂直迁移有限元数值仿真

Characteristics of dust acoustic waves in dissipative dusty plasma in the presence of trapped electrons

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2017年第5期19卷 21-28页

作者： Ranjit k kalita Manoj k DEkA Apul N DEV Jnanjyoti SARMA Department of Mathematics Morigaon College Morigaon-782105 Assam India Department of Applied Sciences Institute of Science and Technology Gauhati University Guwahati-781014 Assam India Center for Applied Mathematics Siksha 'O' Anusandhan University Bhubaneswar-751030 OdishaIndia Department of Mathematics R. G. Baruah College Guwahati-781025 Assam India

The formation and propagation of nonlinear dust acoustic waves（DAWs） as solitary and solitary/shock waves in an unmagnetized, homogeneous, dissipative and collisionless dusty plasma comprising negatively charged micron sized dust grains in the presence of free and trapped electrons with singly charged non-thermal positive ions is discussed in detail. The evolution characteristics of the solitary and shock waves are studied by deriving a modified korteweg–de Vries–Burgers（mkdV–Burgers） equation using the reductive perturbation method. The mkdV–Burgers equation is solved considering the presence（absence） of dissipation. In the absence of dissipation the system admits a solitary wave solution, whereas in the presence of dissipation the system admits shock waves（both monotonic and oscillatory） as well as a combination of solitary and shock wave solutions. Standard methods of solving the evolution equation of shock（solitary） waves are used. The results are discussed numerically using standard values of plasma parameters. The findings may be useful for better understanding of formation and propagation of waves in astrophysical plasma.

关键词： dust acoustic shock wave trapped electrons dissipation

A New Approach to Energy Integral for Investigation of Dust-Ion Acoustic(DIA)Waves in Multi-Component Plasmas with Quantum Effects in Inertia Less Electrons

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2015年第6期63卷 761-768页

作者： B.C.kalita R.kalita Department of Mathematics Gauhati University

Dust-ion acoustic waves are investigated in this model of plasma consisting of negatively charged dusts, cold ions and inertia less quantum effected electrons with the help of a typical energy integral. In this case, a new technique is applied formulating a differential equation to establish the energy integral in case of multi-component plasmas which is not possible in general. Dust-ion acoustic （DIA） compressive and rarefactive, supersonic and subsonic solitons of various amplitudes are established. The consideration of smaller order nonlinearity in support of the newly established quantum plasma model is observed to generate small amplitude solitons at the decrease of Mach number. The growths of soliton amplitudes and potential depths are found more sensitive to the density of quantum electrons. The small density ratio r（= 1 - f） with a little quantized electrons supplemented by the dust charges Zu and the in-deterministic new quantum parameter C2 are found responsible to finally support the generation of small amplitude solitons admissible for the model.

关键词： dust-acoustic solitary waves quantum effects

浅层排水系统面源污染SWAT模拟及控制效能对比

在线全文

学校读者我要写书评

暂无评论

中国给水排水 2015年第9期31卷 70-74页

作者：李世阳王立 prasanta.k.kalita 马放哈尔滨工业大学城市水资源与水环境国家重点实验室黑龙江哈尔滨150090 哈尔滨工业大学宜兴环保研究院江苏宜兴214205 伊利诺伊大学香槟分校

为了全面了解美国中部Illinois州具有浅层排水系统的轮作农业地区面源污染问题,利用Arc GIS和Arc SWAT等地理信息系统和面源污染模拟模型,对Little Vermillion River流域的地表径流水质进行了模拟,同时对各污染控制措施的控制效果进... 详细信息

为了全面了解美国中部Illinois州具有浅层排水系统的轮作农业地区面源污染问题,利用Arc GIS和Arc SWAT等地理信息系统和面源污染模拟模型,对Little Vermillion River流域的地表径流水质进行了模拟,同时对各污染控制措施的控制效果进行了模拟对比。结果表明,过滤带对面源污染的控制效果要优于湿地,其对硝酸盐的去除率可达到10%左右,而对无机磷的去除率更是达到了80%左右,其对污染物的去除率与其设置面积有关;过滤带与湿地联用的净化效果较两者单独应用时要高,能够去除36.30%的总氮和93.04%的总磷。

关键词：浅层排水系统面源污染过滤带湿地 SWAT

Phenolic Profile,Antioxidant,Antihyperlipidemic and Cardiac Risk Preventive Effect of Pigmented Black Rice Variety Chakhao poireiton in High-Fat High-Sugar Induced Rats

在线全文

学校读者我要写书评

暂无评论

水稻科学:英文版 2023年第6期30卷 641-651页

作者： Raja CHAkRABORTY Pratap kalita Saikat SEN Faculty of Pharmaceutical Science Assam down town UniversityAssam 781026India Institute of Pharmacy Assam Don Bosco UniversityAssam 782402India Pratiksha Institute of Pharmaceutical Sciences GuwahatiAssam 781026India

The present study aimed to investigate the hypolipidemic,antioxidant and cardiac risk-suppressing effects of Chakhao poireiton(CP),a GI-tagged pigmented black rice from *** vitro and ex vivo studies confirmed that whole rice extracts of CP have potent antioxidant,3-hydroxy-3-methylglutaryl-CoA reductase,cholesterol esterase inhibitory,and antilipase *** in vivo study was conducted to evaluate the effects of the ethanol extracts of CP on high-fat high-sugar induced hyperlipidemic *** ethanol extract significantly ameliorated lipid parameters and liver enzymes to *** of lactate dehydrogenase,creatine kinase-N-acetyl cysteine,C-reactive protein,and lipoprotein a were significantly lower in the extract-treated groups than those in the disease control group.A marked reduction of ApoB/ApoA1 and other atherogenic indices were observed in extract-treated *** phenolic compounds,*** acid,gallic acid,protocatechuic acid etc.,were quantified in *** study provided the first evidence of the antihyperlipidemic and cardiac risk inhibitory effects of CP,which would be beneficial in preventing and managing hyperlipidemia,associated oxidative stress,and cardiac complications.

关键词： antioxidant cardiac risk high fat high sugar hypolipidemic phenolic compound pigmented rice whole rice

An Intelligent Predictive Model-Based Multi-Response Optimization of EDM Process

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2020年第8期124卷 459-476页

作者： N.Ganesh R.k.Ghadai A.k.Bhoi k.kalita Xiao-Zhi Gao Department of Computer Science and Engineering Vel Tech Multi Tech Dr.Rangarajan Dr.Sakunthala Engineering CollegeChennai600062India Department of Mechanical Engineering Sikkim Manipal Institute of TechnologySikkim Manipal UniversityMajhitar737136India Department of Electrical and Electronics Engineering Sikkim Manipal Institute of TechnologySikkim Manipal UniversityMajhitar737136India Department of Mechanical Engineering Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and TechnologyAvadi600062India School of Computing University of Eastern FinlandKuopio70211Finland

Electrical Discharge Machining(EDM)is a popular non-traditional machining process that is widely used due to its ability to machine hard and brittle *** does not require a cutting tool and can machine complex geometries ***,it suffers from drawbacks like a poor rate of machining and excessive tool *** this research,an attempt is made to address these issues by using an intelligent predictive model coupled global optimization approach to predict suitable combinations of input parameters(current,pulse on-time and pulse off-time)that would effectively increase the material removal rate and minimize the tool *** predictive models,which are based on the symbolic regression approach exploit the machine intelligence of Genetic Programming(GP).As compared to traditional polynomial response surface(PRS)predictive models,the GP predictive models show compactness as well as better prediction *** developed GP predictive models are deployed in conjunction with NSGA-II to predict Pareto optimal solutions.

关键词： EDM genetic algorithm genetic programming micro-machining optimization

The Biharmonic Approach for Unsteady Flow Past an Impulsively Started Circular Cylinder

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Computational Physics 2012年第9期12卷 1163-1182页

作者： Jiten C kalita Shuvam Sen Department of Mathematics Indian Institute of Technology GuwahatiPIN781039India Department of Mathematical Sciences Tezpur UniversityPIN 784028India

In this paper,a newly developed second order temporally and spatially accurate finite difference scheme for biharmonic semi linear equations has been employed in simulating the time evolution of viscous flows past an impulsively started circular cylinder for Reynolds number(Re)up to 9,*** robustness of the scheme and the effectiveness of the formulation can be gauged by the fact that it very accurately captures complex flow structures such as the von kármán vortex street through streakline simulation and the a and b-phenomena in the range 3,000≤Re≤9,500 among *** main focus here is the application of the technique which enables the use of the discretized version of a single semi linear biharmonic equation in order to efficiently simulate different fluid structures associated with flows around a bluff *** compare our results,both qualitatively and quantitatively,with established numerical and more so with experimental *** comparison is obtained in all the cases.

关键词： Biharmonic non-rectangular N-S equations transient circular cylinder von kármán vortex street