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A Study on the Effect of Welding Sequence in Fabrication of Large Stiffened Plate Panels

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Journal of marine Science and Application 2011年第4期10卷 429-436页

作者： Pankaj Biswas D. Anil Kumar N.R.mandal m.m.mahapatra Department of mechanical Engineering Department of Ocean Engineering & Naval Architecture

Welding sequence has a significant effect on distortion pattern of large orthogonally stiffened panels normally used in ships and offshore structures. These deformations adversely affect the subsequent fitup and alignment of the adjacent panels. It may also result in loss of structural integrity. These panels primarily suffer from angular and buckling distortions. The extent of distortion depends on several parameters such as welding speed, plate thickness, welding current, voltage, restraints applied to the job while welding, thermal history as well as sequence of welding. Numerical modeling of welding and experimental validation of the FE model has been carried out for estimation of thermal history and resulting distortions. In the present work an FE model has been developed for studying the effect of welding sequence on the distortion pattern and its magnitude in fabrication of orthogonally stiffened plate panels.

关键词： elasto-plastic analysis welding distortion 3-D finite element analysis stiffened panel weldingsequence

Effect of Tool Shoulder and Pin Probe Profiles on Friction Stirred Aluminum Welds-a Comparative Study

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Journal of marine Science and Application 2012年第2期11卷 200-207页

作者： H.K.mohanty m.m.mahapatra P.Kumar P.Biswas N.R.mandal mechanical & Industrial Engineering Department IIT Roorkee-247667 India. Department of mechanical Engineering IIT Guwahati- 781039 India Department of Ocean Engineering & Naval Architecture IIT Kharagpur-721302 India.

In marine application,marine grade steel is generally used for haul and ***,aluminum has also become a good choice due to its lightweight qualities,while rusting of aluminum is minimal compared to *** this paper a study on friction stir welding of aluminum alloys was *** present investigation deals with the effects of different friction stir welding tool geometries on mechanical strength and the microstructure properties of aluminum alloy *** distinct tool geometries with different types of shoulder and tool probe profiles were used in the investigation according to the design *** effects of each tool shoulder and probe geometry on the weld was *** was also observed that the friction stir weld tool geometry has a significant effect on the weldment reinforcement,microhardness,and weld strength.

关键词： friction stir welding tool geometries weld strength weld cross section area

modeling the Effects of Tool Shoulder and Probe Profile Geometries on Friction Stirred Aluminum Welds Using Response Surface methodology

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Journal of marine Science and Application 2012年第4期11卷 493-503页

作者： H. K. mohanty m. m. mahapatra P. Kumar P. Biswas N. R. mandal mechanical & Industrial Engineering Department HT Roorkee-24 766 7 India. Department of mechanical Engineering HT Guwahati- 781039 India Department of Ocean Engineering & Naval Architecture IIT Kharagpur- 721302 India.

The present paper discusses the modeling of tool geometry effects on the friction stir aluminum welds using response surface methodology. The friction stir welding tools were designed with different shoulder and tool probe geometries based on a design matrix. The matrix for the tool designing was made for three types of tools, based on three types of probes, with three levels each for defining the shoulder surface type and probe profile geometries. Then, the effects of tool shoulder and probe geometries on friction stirred aluminum welds were experimentally investigated with respect to weld strength, weld cross section area, grain size of weld and grain size of thermo-mechanically affected zone. These effects were modeled using multiple and response surface regression analysis. The response surface regression modeling were found to be appropriate for defining the friction stir weldment characteristics.

关键词： friction stir welding (FSW) tool geometries mechanical properties microstructures response surface regression modeling

model dependent analysis of ■→■ decays in beyond standard model

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Chinese Physics C 2024年第9期48卷 86-99页

作者： S.mahata m.mandal H.mahapatra S.Biswas S.Sahoo Department of Physics National Institute of Technology Durgapur

motivated by the recent experimental results of branching fractions for ■→■ decays,which deviate from their Sm predictions,we hve investigated these decays in W' model and scalar leptoquark model to determine potential signatures of new physics(NP) in semileptonic charm decays induced by c→■ *** recent experimental results of branching fractions for semileptonic D meson decays,new coupling parameters are predicted for the aforementioned NP *** fraction,forward-backward asymmetry,and lepton polarization asymmetry are examined by considering the predicted NP coupling *** results of branching fractions in scalar leptoquark model are found very close to the experimental results and exist around the range of 1σ *** presented a comparative study of the NP models to check their sensitivity on these *** anticipate that further research on these decays will significantly support our findings.

关键词： $ W' $ boson charm decay flavour changing charged current new physics scalar leptoquark

model dependent analysis of D^(+)_(s)→η^(′)l+v_(l) decays in beyond standard model

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Chinese Physics C 2024年第9期48卷 82-95页

作者： S.mahata m.mandal H.mahapatra S.Biswas S.Sahoo Department of Physics National Institute of Technology Durgapur Durgapur 713209West BengalIndia

motivated by the recent experimental results of branching fractions for D^(+)_(s)→η^(′)l+v_(l) decays,which deviate from their Sm predictions,we hve investigated these decays in W' model and scalar leptoquark model to determine potential signatures of new physics(NP) in semileptonic charm decays induced by c→(s,d)l+v_(l) *** recent experimental results of branching fractions for semileptonic D meson decays,new coupling parameters are predicted for the aforementioned NP *** fraction,forward-backward asymmetry,and lepton polarization asymmetry are examined by considering the predicted NP coupling *** results of branching fractions in scalar leptoquark model are found very close to the experimental results and exist around the range of 1σ *** presented a comparative study of the NP models to check their sensitivity on these *** anticipate that further research on these decays will significantly support our findings.

关键词： charm decay new physics W′boson scalar leptoquark flavour changing charged current

macrophage polarization or repolarization in tuberculosis

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Asian Pacific Journal of Tropical medicine 2024年第10期17卷 435-444页

作者： Arijeet Samanta Sangita maity Raghunath Hazra Adithyan Jayaraman Santanu Kar mahapatra Department of Paramedical and Allied Health Sciences Biodiversity and Environmental Studies Research CentreMidnapore City CollegeKuturiyaBhadutalaPaschim Medinipur 721129West BengalIndia

Tuberculosis caused by mycobacterium(m.)tuberculosis remains a global public health *** the last few decades,anti-tubercular research mainly focused on mechanisms of identifying by which activated macrophages can slaughter or the proliferation of *** bacilli prevented in a cell-dependent *** this regard,for disease resolution,inflammatory cytokines are very ***,we demonstrate how macrophages act as the first line of defense against the *** have revealed a dual role in *** infection played by *** is worth mentioning that the macrophages are the crucial immune effector and antigen-presenting cells that play the anti-tubercular response,which is the habitat of ***,hence,followed by progressing the disease protecting *** dual role can be correlated with the different macrophage polarization statuses,namely,m1 and ***,we have stated how the several polarization conditions of macrophages are directly linked to the immune responses during host and *** pathogen *** have proposed that macrophage polarization and repolarization are of paramount significance for the anti-tubercular immune response that may involve a sterile cure of the *** article summarizes the immune response to ***,the polarization states of macrophages during *** and the repolarization of macrophages by some agents during some diseases including ***,which may be an important factor in the World Health Organization's target to cure tuberculosis by 2035.

关键词： Tuberculosis macrophage polarization Effector responses Antitubercular immune response

Study on effect of TiB2 reinforcement on the microstructural and mechanical properties of magnesium RZ5 alloy based metal matrix composites

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Journal of magnesium and Alloys 2020年第3期8卷 780-792页

作者： Arabinda meher manas mohan mahapatra Priyaranjan Samal Pandu R.Vundavilli School of mechanical Sciences Indian Institute of Technology BhubaneswarOdisha 752050India

A self-propagating high-temperature synthesis route is adopted for the fabrication of TiB2-reinforced magnesium RZ5 alloy-based in-situ metal matrix ***-B is used according to the appropriate stoichiometry to obtain 4,6 and 8 wt.%TiB2 *** base alloy and cast composites are solutionised to enhance the mechanical properties of the materials.A microstructural study of the composites is carried out using optical microscopy and field emission seanning electron microscopy(FESEm)and revealed near-uniform distribution of TiB2 particles in the magnesium RZ5 alloy matrix.X-ray diffraction revealed the formation of the TiB2 reinforcement along with the transient phase TiB and *** hardness of the RZ5 alloy-based composites increases by 7.12%,17.06%and 32.07%with the addition of 4,6 and 8 wt.%TiB2 reinforcements,*** ultimate tensile strength of the as-cast composite increases by 30.47%with the addition of 8 wt.%*** tensile strength and ductility of the materials is improved by using the solutionising heat *** heat-treated composite containing 8 wt.%TiB2 results in an ultimate tensile strength of 178.7 *** tensile fracture surfaces are analysed using *** wear loss of the materials decreased from 25.826 mm^(3)to 22.949 mm^(3)by the adding 8 wt.%TiB2 for the sliding distance of 2000 *** of the worn surfaces obtained from FESEm of both the base alloy and composites are also studied which indicate delamination,wear groove and oxide formation.

关键词： In-situ composites magnesium RZ5 alloy Heat-treatment Tensile strength Wear resistance.

Intelligent recognition system for viewpoint variations on gait and speech using CNN-CapsNet

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International Journal of Intelligent Computing and Cybernetics 2022年第3期15卷 363-382页

作者： G.merlin Linda N.V.S.Sree Rathna Lakshmi N.Senthil murugan Rajendra Prasad mahapatra V.muthukumaran m.Sivaram Department of Computer Science and Engineering SRM Institute of Science and Technology–Vadapalani CampusChennaiIndia Department of Electronics and Communication Engineering Agni College of TechnologyChennaiIndia School of Computer Science and Engineering VIT-AP UniversityAmaravatiIndia Department of Computer Science and Engineering SRM Institute of Science and TechnologyGhaziabadIndia Department of mathematics School of Applied SciencesREVA UniversityBangaloreIndia Faculty of Information Technology Ton Duc Thang UniversityHo Chi Minh CityVietnam

Purpose-The paper aims to introduce an intelligent recognition system for viewpoint variations of gait and *** proposes a convolutional neural network-based capsule network(CNN-CapsNet)model and outlining the performance of the system in recognition of gait and speech *** proposed intelligent system mainly focuses on relative spatial hierarchies between gait features in the entities of the image due to translational invariances in sub-sampling and speech ***/methodology/approach-This proposed work CNN-CapsNet is mainly used for automatic learning of feature representations based on CNNand used capsule vectors as neurons to encode all the spatial information of an image by adapting equal variances to change in *** proposed study will resolve the discrepancies caused by cofactors and gait recognition between opinions based on a model of ***-This research work provides recognition of signal,biometric-based gait recognition and sound/speech *** evaluations are conducted on three aspects of scenarios,namely fixed-view,cross-view and multi-view *** main parameters for recognition of gait are speed,change in clothes,subjects walking with carrying object and intensity of *** limitations/implications-The proposed CNN-CapsNet has some limitations when considering for detecting the walking targets from surveillance videos considering multimodal fusion approaches using hardware sensor *** can also act as a pre-requisite tool to analyze,identify,detect and verify the malware *** implications-This research work includes for detecting the walking targets from surveillance videos considering multimodal fusion approaches using hardware sensor *** can also act as a pre-requisite tool to analyze,identify,detect and verify the malware ***/value-This proposed research work proves to be performing better for the recognition of gait and speech when

关键词： Intelligent system Gait recognition Convolutional neural network Deep learning Capsule network Viewpoint variations

Effective Tool for Test Case Execution Time Reduction

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Effective Tool for Test Case Execution Time Reduction