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A RANDOM FIXED POINT ITERATION FOR THREE RANDOM OPERATORS ON UNIFORMLY CONVEX BANACH SPACES

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Analysis in Theory and Applications 2003年第2期19卷 99-107页

作者： Binayak S.choudhury Deemend University India

In the present paper we introduce a random iteration scheme for three random operators defined on a closed and convex subset of a uniformly convex Banach space and prove its convergence to a common fixed point of thre... 详细信息

关键词： random iteration fixed point uniformly convex Banach space

The formation of authigenic deposits during Paleogene warm climatic intervals:A review

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Journal of Palaeogeography 2020年第4期9卷 388-414页

作者： Santanu Banerjee Tathagata Roy choudhury Pratul Kumar Saraswati Sonal Khanolkar Department of Earth Sciences Indian Institute of Technology BombayPowaiMumbai-400076India Department of Earth Sciences Indian Institute of Technology KanpurKanpur-208016India

Although Paleogene warm climatic intervals have received considerable attention for atmospheric and oceanographic changes,the authigenic mineralization associated with these time spans remains *** extensive review of the literature reveals a close correspondence between the high abundance of glauconite and warm climatic intervals during the Paleogene *** abundance of phosphorite,ironstone,lignite and black shale deposits reveals similar *** investigated thoroughly,the origin of these authigenic deposits is never understood in the background of Paleogene warming climatic intervals.A combination of factors like warm seawater,hypoxic shelf,low rate of sedimentation,and enhanced rate of continental weathering facilitated the *** last factor caused the excess supply of nutrients,including Fe,Si,K,Mg and Al through the rivers,the cations needed for the formation of *** excessive inflow of nutrient-rich freshwater into the shallow seas further ensured high organic productivity and stratification in shallow shelves,causing *** consequent rapid rise in sea-level during the warm periods created extensive low-relief shallow marine shelves starved in ***-deficiency in the shallow marine environment facilitated the fixation of Fe into the glauconite *** inflow of nutrient-rich water during the warm climatic intervals facilitated the formation of phosphorite,ironstone,and organic-matter-rich sedimentary deposits as *** global factors primarily controlled the formation of these authigenic deposits,local factors played significant roles in some of the ***,phosphorites formed in marine conditions with open circulation within the tropical *** lush growth of rainforest covers in the tropical belt facilitated the formation of coastal lignite.

关键词： Warm climatic intervals Hyperthermal events Glauconite Phosphorite Oolitic ironstone Lignite Hypoxia Paleogene

On the nonclassical dynamics of cavity-assisted four-channel nonlinear coupler

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Chinese Physics B 2018年第11期27卷 498-505页

作者： Rafael Julius Abdel-Baset M A Ibrahim Pankaj Kumar choudhury Hichem Eleuch Faculty of Applied Sciences Universiti Teknologi MARA (UiTM) Faculty of Applied Sciences Universiti Teknologi Mara (UiTM) Perak Tapah Campus Institute of Microengineering and Nanoelectronics Universiti Kebangsaan Malaysia Department of Applied Sciences and Mathematics College of Arts and Sciences Abu Dhabi University Institute for Quantum Science and Engineering Texas A&M University College Station

The non-classical properties of light propagating in four-channel Kerr waveguides, confined in an optical cavity, are studied. The solution to the Hamiltonian of field operators is obtained semi-analytically by using symmetrically ordered phase-space representation. Full quantum analysis of the input coherent fields displays a strong transition of photon property between the super-Poissonian and sub-Poissonian statistics. It is found that the cavity-assisted multichannel system exhibits enhanced squeezing both in single-and compound-mode. This multichannel system may be utilized as an efficient quantumlight generator.

关键词： squeezed states Kerr effects Langevin equation

Shared Standard Setting in the Public Interest： A Strong Model

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中国注册会计师 2014年第8期 29-30页

作者： Fayez choudhury IFAC

The last two decades have been a definitive era in the evolution of the accountancy *** the wake of major corporate scandals at the turn of the century,an international public debate arose on the need for more effecti... 详细信息

关键词：会计师会计学会计准则注册会计师

Determination of blast-induced ground vibration equations for rocks using mechanical and geological properties

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Journal of Rock Mechanics and Geotechnical Engineering 2016年第3期8卷 341-349页

作者： Ranjan Kumar Deepankar choudhury Kapilesh Bhargava Department of Civil Engineering Indian Institute of Technology BombayPowaiMumbai 400076India Civil Engineering Division Bhabha Atomic Research CentreMumbai 400085India Academy of Scientific and Innovative Research(AcSIR) New DelhiIndia Nuclear Recycle Board Bhabha Atomic Research CentreMumbai 400085India Homi Bhabha National Institute MumbaiIndia

In the recent decades, effects of blast loads on natural and man-made structures have gained considerable attention due to increase in threat from various man-made activities. Site-specific empirical relationships for calculation of blast-induced vibration parameters like peak particle velocity （PPV） and peak particle displacement （PPD） are commonly used for estimation of blast loads in design. However, these relation- ships are not able to consider the variation in rock parameters and uncertainty of in situ conditions. In this paper, a total of 1089 published blast data of various researchers in different rock sites have been collected and used to propose generalized empirical model for PPV by considering the effects of rock parameters like unit weight, rock quality designation （ROD）, geological strength index （GSI）, and uniaxial compressive strength （UCS）. The proposed PPV model has a good correlation coefficient and hence it can be directly used in prediction of blast-induced vibrations in rocks. Standard errors and coefficient of correlations of the predicted blast-induced vibration parameters are obtained with respect to the observed field data. The proposed empirical model for PPV has also been compared with the empirical models available for blast vibrations predictions given by other researchers and found to be in good agreement with specific cases.

关键词： Blast loadsEmpirical equationsRock quality designation (RQD)Unit weightPeak particle velocity (PPV)Uniaxial compressive strength (UCS)Geological strength index (GSI)

An Improved Analysis of Masses and Decay Constants of Heavy Flavour Mesons within Variational Approach

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Communications in Theoretical Physics 2019年第1期71卷 49-55页

作者： Jugal Lahkar D.K.choudhury B.J.Hazarika Department of Physics Gauhati University Centre of Theoretical Physics Pandu College Physics Academy of North-East (PANE)

We employ the variational method to study the properties such as masses, decay constants, oscillation frequency and branching ratios of leptonic decays of heavy flavour mesons with linear cum coulomb Cornell *** function, Coulomb wave function and Airy function are taken as the trial wave-function of variational method in this study. Our analysis suggests that Gaussian trial wave-function provides results which are in close proximity with the experimental results. We also make a comparison with the results from QCD Sum rules and lattice QCD, as well as with recent PDG data.

关键词： quantum chromo dynamics decay constant meson mass

Computational Model of Edge Effects in Graphene Nanoribbon Transistors

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Nano Research 2008年第5期1卷 395-402页

作者： Pei Zhao Mihir choudhury Kartik Mohanram Jing Guo Department of Electrical and Computer Engineering University of FloridaGainesvilleFL 32611USA Department of Electrical and Computer Engineering Rice UniversityHoustonTX 77005USA

We present a semi-analytical model incorporating the effects of edge bond relaxation,the third nearest neighbor interactions,and edge scattering in graphene nanoribbon fi eld-effect transistors(GNRFETs)with armchair-edge GNR(AGNR)*** carbon nanotubes(CNTs)which do not have edges,the existence of edges in the AGNRs has a signifi cant effect on the quantum capacitance and ballistic I V characteristics of *** an AGNR with an index of m=3p,the band gap decreases and the ON current increases whereas for an AGNR with an index of m=3p+1,the quantum capacitance increases and the ON current *** effect of edge scattering,which reduces the ON current,is also included in the model.

关键词： Graphene nanoribbon field-effect transistor edge bond relaxation third nearest neighbor interaction edge scattering

Distinguishing celadonite from glauconite for environmental interpretations:a review

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维普期刊数据库

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Journal of Palaeogeography 2023年第2期12卷 179-194页

作者： Pragya Singh Santanu Banerjee Tathagata Roy choudhury Satadru Bhattacharya Kanchan Pande Department of Earth Sciences Indian Institute of Technology BombayPowaiMumbai400076India Space Applications Centre Indian Space Research OrganisationAhmedabad380015India

Celadonite and glauconite are comparable in terms of physical,chemical and mineralogical *** of both these minerals requires slightly oxygen-depleted conditions in a semiconfined micro-environment,facilitating the uptake of Fe into the *** glauconite is ubiquitous in marine deposits,celadonite forms in both marine and non-marine environments,more commonly by altering intermediate to mafic rocks.A review of data across the geological column shows that both these minerals are more common in the Mesozoic and Cenozoic,which may be related to extensive *** composition of celadonite and glauconite is highly variable and is controlled by the availability of cations within the pore water *** major element composition of celadonite overlaps with that of evolved to highly evolved glauconite to a large *** data and representative samples of celadonite and glauconite reveal subtle differences in X-ray diffraction parameters and Fourier transform infrared(FTIR)*** shows sharper basal and hkl reflections than *** characteristically exhibits distinct 111-021,003-022,023 and 130-131,and 060 reflections at less than 1.51A,indicating a betterordered crystallographic structure than *** FTIR spectra of celadonite and glauconite show similar absorption bands although Si-O bending,Si-O stretching and OH-stretching bands are sharper and well resolved in celadonite than that of *** palaeoenvironmental interpretations,it is,therefore,necessary to examine the subtle differences in X-ray diffraction parameters and FTIR spectra to confirm the identification of these two *** composition of celadonite relates closely to the host rock and depositional *** celadonite associated with mafic rock shows relatively high Fe,Mg and low Al *** contrast,those associated with felsic to intermediate composition rocks show slightly higher contents of Al and

关键词： Celadonite Glauconite Authigenic green silicates Large igneous province Marine Fourier transform infrared spectroscopy X-ray diffraction

From Laboratory to Field:Unsupervised Domain Adaptation for Plant Disease Recognition in the Wild

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Plant Phenomics 2023年第2期5卷 195-208页

作者： Xinlu Wu Xijian Fan Peng Luo Sruti Das choudhury Tardi Tjahjadi Chunhua Hu College of Information Science and Technology Nanjing Forestry UniversityNanjing 210037China Institute of Forest Resource Information Techniques Chinese Academy of ForestryBeijing 100091China Key Laboratory of Forestry Remote Sensing and Information System National Forestry and Grassland AdministrationBeijing 100091China Department of Computer Science and Engineering University of Nebraska-LincolnLincolnNE 68588USA School of Engineering University of WarwickCoventry CV47ALUK

Plant disease recognition is of vital importance to monitor plant development and predicting crop ***,due to data degradation caused by different conditions of image acquisition,e.g.,laboratory *** environment,machine learning-based recognition models generated within a specific dataset(source domain)tend to lose their validity when generalized to a novel dataset(target domain).To this end,domain adaptation methods can be leveraged for the recognition by learning invariant representations across *** this paper,we aim at addressing the issues of domain shift existing in plant disease recognition and propose a novel unsupervised domain adaptation method via uncertainty regularization,namely,Multi-Representation Subdomain Adaptation Network with Uncertainty Regularization for Cross-Species Plant Disease Classification(MSUN).Our simple but effective MSUN makes a breakthrough in plant disease recognition in the wild by using a large amount of unlabeled data and via nonadversarial ***,MSUN comprises multirepresentation,subdomain adaptation modules and auxiliary uncertainty *** multirepresentation module enables MSUN to learn the overall structure of features and also focus on capturing more details by using the multiple representations of the source *** effectively alleviates the problem of large interdomain *** adaptation is used to capture discriminative properties by addressing the issue of higher interclass similarity and lower intraclass ***,the auxiliary uncertainty regularization effectively suppresses the uncertainty problem due to domain *** was experimentally validated to achieve optimal results on the PlantDoc,Plant-Pathology,Corn-Leaf-Diseases,and Tomato-Leaf-Diseases datasets,with accuracies of 56.06%,72.31%,96.78%,and 50.58%,respectively,surpassing other state-of-the-art domain adaptation techniques considerably.

关键词： Plant breakthrough details