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tuna classific.t.on using super learner ensemble of region-based cNN-grouped 2D-LBP models

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Information Processing in Agriculture 2022年第1期9卷 68-79页

作者： Jisha Anu Jose c.Sathish kumar S.Sureshkumar Rajiv Gandhi Institute of technology KottayamIndia Government Engineering college IdukkiIndia Kerala University of Fisheries and Ocean Studies KochiIndia

tuna is superior among the marine fishes that are exported in the forms of raw fish and processed *** of tuna into their species is done in industries manually,and the process is *** work proposes an automated system for classifying tuna spe-cies based on their *** ensemble of region-based deep neural networks is used.A sub region contrast stretching operation is applied to enhance the *** fish image is then divided into three regions and is augmented before giving as input to pre-trained convolutional neural networks(cNN).After fine-tuning the models,the output from the last convolutional layer is given to a grouped 2D-local binary pattern descriptor(G2DLBP).Statistical features from the descriptor are applied to different classifiers,and the best clas-sifier for each image region model is *** ensemble methods are subse-quently used to combine the three cNN-G2DLBP *** the ensemble techniques,super learner ensemble method with random forest(RF)classifier using 5-fold cross-validation shows the highest classific.t.on accuracy of 97.32%.the perfor-mance of different ensemble methods is analyzed in terms of accuracy,precision,recall,and *** proposed system shows an accuracy of 93.91% when evaluated with an independent test *** ensemble of region-based cNN with textural features from G2DLBP is applied for the first time for fish classific.t.on.

关键词： tuna classific.t.on convolutional neural network Grouped 2D-local binary pattern Super learner ensemble

Mixed convection flow in vertical channel with boundary conditions of third kind in presence of heat source/sink

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Applied Mathematics and Mechanics(English Edition) 2012年第8期33卷 1015-1034页

作者： J.c.UMAVAtHI J.PRAtHAP kumar JAWERIYA SULtANA Department of Mathematics Gulbarga UniversityGulbarga 585106KarnatakaIndia

the effects of viscous dissipation and heat source/sink on fully developed mixed convection for the laminar flow in a parallel-plate vertical channel are investigated. the plate exchanges heat with an external fluid. Both conditions of equal and different reference temperatures of the external fluid are considered. First, the simple cases of the negligible Brinkman number or the negligible Grashof number are solved analytically. then, the combined effects of buoyancy forces and viscous dissipation in the presence of heat source/sink are analyzed by a perturbation series method valid for small values of the perturbation parameter. to relax the conditions on the perturbation parameter, the veloc.t. and temperature fields are solved by using the Runge-Kutta fourth-order method with the shooting technique. the veloc.t., temperature, skin friction, and Nusselt num- bers at the plates are discussed numerically and presented through graphs.

关键词： mixed convection viscous fluid perturbation method Runge-Kuttashooting method heat source/sink

Growth of ZnSe∶Mn Nanocrystals from Vapour Phase

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Journal of Rare Earths 2006年第z1期24卷 111-114页

作者： O Senthil kumar K Balkis Ameen S Soundeswaran t Rajasekharan R Dhanasekaran crystal Growth centre Anna University Chennai-600 025 India Defence Metallurgical Research Laboratory Hyderabad-500 058 India Crystal Growth Centre Anna University Chennai-600 025 India Defence Metallurgical Research Laboratory Hyderabad-500 058 India Crystal Growth Centre Anna University Chennai-600 025 India

ZnSe∶Mn nanocrystals were grown by chemical vapour transport method using the matrix of SiO2 aerogels. the cubic structure of the nanocrystals was confirmed by powder X-ray diffraction (XRD) and electron diffraction (ED) studies. the size of the crystals was observed using transmission electron microscope (tEM). the oxidation state of Mn in ZnSe nanocrystal was found using electron spin resonance (ESR) spectrum. the room temperature luminescence measurements show the peaks corresponding to both bandgap of the material and Mn in ZnSe.

关键词： Ⅱ-Ⅵ semiconductors nanocrystalline materials electron spin resonance

Wave propagation at interface of heat conducting micropolar solid and fluid media

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Applied Mathematics and Mechanics(English Edition) 2011年第7期32卷 881-902页

作者： R.kumar M.KAUR S.c.RAJVANSHI Department of Mathematics Kurukshetra UniversityKurukshetra 136119India Department of Applied Sciences Guru Nanak Dev Engineering CollegeLudhianaPunjab 141008India Department of Applied Sciences Gurukul VidyapeethInstitute of Engineering and TechnologyBanurPunjab 140601India

the present investigation is concerned with the wave propagation at an interface of a micropolar generalized thermoelastic solid half space and a heat conducting micropolar fluid half space. Reflection and transmission phenomena of plane waves are investigated, which impinge obliquely at the plane interface between a micropolar generalized thermoelastic solid half space and a heat conducting micropolar fluid half space. the incident wave is assumed to be striking at the interface after propagating through the micropolar generalized thermoelastic solid. the amplitude ratios of various reflected and transmitted waves are obtained in a closed form. It is found that they are a function of the angle of incidence and frequency and are affected by the elastic properties of the media. Micropolarity and thermal relaxation effects are shown on the amplitude ratios for a specific model. the results of some earlier literatures are also deduced from the present investigation.

关键词： micropolar solid micropolar fluid thermoelastic reflection coefficient,transmission coefficient half space

MULtI-FAcILItY ORDERED MEDIAN PROBLEMS IN DIREctED NEtWORKS

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Journal of Systems Science & complexity 2011年第1期24卷 61-67页

作者： Huajun tANG t. c. Edwin cHENG c. t. NG Faculty of Management and Administration Macao University of Science and Technology Macao China Department of Logistics and Maritime Studies The Hong Kong Polytechnic University Hong Kong China

this paper uses a finite dominating set （FDS） to investigate the multi-facility ordered median problem （OMP） in a strongly connected directed network. the authors first prove that the multi-facility OMP has an FDS in the node set, which not only generalizes the FDS result provided by Kalcsics, et al. （2002）, but also extends the FDS result from the single-facility case to the multiple case, filling an important gap. then, based on this FDS result, the authors develop an exact algorithm to solve the problem. However, if the number of facilities is large, it is not practical to find the optimal solution, because the multi-facility OMP in directed networks is NP-hard. Hence, we present a constant-approximation algorithm for the p-median problem in directed networks. Finally, we pose an open problem for future research.

关键词： Algorithms finite dominating sets multi-facility ordered median problem pseudoequilibria.

Aerodynamics of a tandem-Bladed Axial compressor Rotor under circumferential Distortion at Different Rotational Speeds

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Journal of thermal Science 2024年第4期33卷 1340-1356页

作者： Amit kumar Jerry t.JOHN A.M.PRADEEP R.A.DAKKERMANS Dragan KOZULOVIc Department of Aerospace Engineering Indian Institute of Technology BombayMumbai400076India Department of Automotive and Aeronautical Engineering Hamburg University of Applied Sciences20099HamburgGermany Institute of Jet Propulsion Bundeswehr University Munich85577NeubibergGermany

For most aircraft engines,inflow distortion is *** distortion is known to degrade the aerodynamic performance and stable operating limits of a *** rotor configuration is an arrangement that effectively controls the growth of the boundary layer over the suction surface of the ***,a higher total pressure rise can be achieved through this unconventional design approach involving the splitting of the blade into forward and aft *** is expected that the effect of inlet flow distortion would be more severe for a tandem-rotor design due to the greater flow turning inherent in such ***,this aspect needs to be thoroughly *** present study discusses the effect of circumferential distortion on the tandem-rotor at different rotational ***-annulus RANS simulations using ANSYS cFX are used in the present *** performance of the rotor at a particular flow coefficient and different rotational speeds is *** total pressure and efficiency are observed to drop at lower mass flow rates under the influence of circumferential *** loss region in each blade passage is mainly associated with the blade wake,tip leakage vortex,secondary flow,and boundary ***,their contribution varies from passage to passage,particularly in the distorted *** the lower span,the wake width is found to be higher than that at a higher *** to the redistribution of the mass flow,the circumferential extent reduces at a higher *** the undistorted sector,the strength of the tip leakage vortex is significantly higher at the design rotational speed than at lower *** distortion near the tip region promotes an early vortex breakdown even at the design operating *** adversely affects the total pressure,efficiency,and stall *** clean flow conditions,this phenomenon is only observed near the stall *** the design operating condition,the breakdown of the forward rotor tip l

关键词： tandem rotor circumferential distortion loss tip leakage vortex vortex breakdown diffusion factor aerodynamics of compressor blade

Influence of porosity distribution on nonlinear free vibration and transient responses of porous functionally graded skew plates

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Defence technology（防务技术） 2021年第6期17卷 1918-1935页

作者： Naveen kumar H S Subhaschandra Kattimani tNguyen-thoi Department of Mechanical Engineering National Institute of Technology KarnatakaSurathkal575025India Division of computational Mathematics and Engineering Institute for Computational ScienceTon Duc Thang UniversityHo Chi Minh CityViet Nam Faculty of civil Engineering ton Duc.t.ang University Ho Chi Minh CityViet Nam

this article deals with the investigation of the effects of porosity distributions on nonlinear free vibration and transient analysis of porous functionally graded skew(PFGS)*** effective material properties of the PFGS plates are obtained from the modified power-law equations in which gradation varies through the thickness of the PFGS plate.A nonlinear finite element(FE)formulation for the overall PFGS plate is derived by adopting first-order shear deformation theory(FSDt)in conjunction with von Karman’s nonlinear strain displacement *** governing equations of the PFGS plate are derived using the principle of virtual *** direct iterative method and Newmark’s integration technique are espoused to solve nonlinear mathematical *** influences of the porosity distributions and porosity parameter indices on the nonlinear frequency responses of the PFGS plate for different skew angles are studied in various *** effects of volume fraction grading index and skew angle on the plate’s nonlinear dynamic responses for various porosity distributions are illustrated in detail.

关键词： Porous functionally graded skew plates Porosity distributions Nonlinear transient response Nonlinear frequency ratio Nonlinear frequency parameter

Neutronic analysis of Indian helium-cooled solid breeder tritium breeding module for testing in ItER

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Plasma Science and technology 2022年第6期24卷 189-195页

作者： H L SWAMI Deepak SHARMA c DANANI P cHAUDHARI R SRINIVASAN Rajesh kumar Institute for Plasma Research Gandhinagar 382428India Homi Bhabha National Institute AnushaktinagarMumbai 400094India

India has proposed the helium-cooled solid breeder blanket concept as a tritium breeding module to be tested in *** module has lithium titanate for tritium breeding and beryllium for neutron *** also enhances tritium breeding.A design for the module is prepared for detailed *** analysis is performed to assess the tritium breeding rate,neutron distribution,and heat distribution in the *** tritium production distribution in submodules is evaluated to support the tritium transport *** tritium breeding density in the radial direction of the module is also assessed for further optimization of the *** heat deposition profile of the entire module is generated to support the heat removal circuit *** estimated neutron spectrum in the radial direction also provides a more in-depth picture of the nuclear interactions inside the material *** total tritium produced in the HcSB module is around 13.87 mg per full day of operation of ItER,considering the 400 s ON time and 1400 s dwell *** estimated nuclear heat load on the entire module is around 474 kW,which will be removed by the high-pressure helium cooling *** heat deposition in the test blanket model(tBM)is huge(around 9 GJ)for an entire day of operation of ItER,which demonstrates the scale of power that can be produced through a fusion reactor *** per the Brayton cycle,it is equivalent to 3.6 GJ of electrical *** terms of power production,this would be around 1655 MWh *** evaluation is carried out using the McNP5 Monte carlo radiation transport code and FEDNL 2.1 nuclear cross section *** HcSB tBM neutronic performance demonstrates the tritium production capability and high heat deposition.

关键词： HcSB tBM tritium nuclear heat ItER

Spectral Analysis and crystal Structure of Spiro[2.2”] Acenaphthene-1”-One-Spiro[3.3’]-5’-(2,3-Dichlorophenyl Methylidene)-1’-Methylpiperidin-4’-One-4- (2,3-Dichlorophenyl) Octahydroindolizine

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crystal Structure theory and Applic.t.ons 2012年第3期1卷 74-78页

作者： Rakkappan Vishnu Priya Janakiraman Suresh Sathiyamoorthi Sivakumar Raju ranjith kumar Department of Organic chemistry School of Chemistry Madurai Kamaraj University Madurai India Department of Physics The Madura College (Autonomous) Madurai India

the crystal structure of spiro[2.2”]acenaphthene-1”-onespiro[3.3’]-5’-(2,3-dichlorophenylmethylidene)-1’-methylpipe-ridin-4’-one-4-(2,3-dichorophenyl) octahydroindolizine was elucidated by single crystal X ray diffraction. the title compound c37H30cl4N2O2, crystallizes in the orthorhombic system, space group P212121 with a = 8.4610(4) , b = 16.0926(6) , c= 23.8997(11) and Z = 4. the central piperidine ring adopts twisted conformation, the piperidine of octahydroindolizine ring is in chair conformation and the pyrrole ring is in slightly twisted envelope conformation. Details of the synthesis, NMR, crystal structure determination and intra- and inter- molecular interactions of the compound are given.

关键词： Single crystal Structure conformation Hydrogen Bond NMR Spectra