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Artificial neural network-based merging score for Meta search engine

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Journal of Central South University 2016年第10期23卷 2604-2615页

作者： p.vijaya G.Raju Santosh Kumar Ray Karpagam University Coimbatore TamilNadu India Faculty of Engineering and Technology Associate professor Department of Information Technology Kannur University Kannur Kerala-670 567 India Department of Information Technology Al Khawarizmi International College Al Alin UAE

Several users use metasearch engines directly or indirectly to access and gather data from more than one data sources. The effectiveness of a metasearch engine is majorly determined by the quality of the results and it returns and in response to user queries. The rank aggregation methods which have been proposed until now exploits very limited set of parameters such as total number of used resources and the rankings they achieved from each individual resource. In this work, we use the neural network to merge the score computation module effectively. Initially, we give a query to different search engines and the top n list from each search engine is chosen for further processing our technique. We then merge the top n list based on unique links and we do some parameter calculations such as title based calculation, snippet based calculation, content based calculation, domain calculation, position calculation and co-occurrence calculation. We give the solutions of the calculations with user given ranking of links to the neural network to train the system. The system then rank and merge the links we obtain from different search engines for the query we give. Experimentation results reports a retrieval effectiveness of about 80%, precision of about 79% for user queries and about 72% for benchmark queries. The proposed technique also includes a response time of about 76 ms for 50 links and 144 ms for 100 links.

关键词： metasearch engine neural network retrieval of documents ranking list

Influence of Thermophoresis and Brownian Motion of Nanoparticles on Radiative Chemically-Reacting MHD Hiemenz Flow over a Nonlinear Stretching Sheet with Heat Generation

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Fluid Dynamics & Materials processing 2023年第4期19卷 855-868页

作者： S.Mohammed Ibrahim p.vijaya Kumar G.Lorenzini Department of Engineering Mathematics College of EngineeringKoneru Lakshmaiah Education FoundationVaddeswaramAndhra Pradesh522302India Department of Mathematics GITAM(Deemed to be University)VisakhapatnamAndhra Pradesh530045India Department of Industrial Engineering University of Parma-Parco Area Delle ScienzeParma43124Italy

In this study,a radiative MHD stagnation point flow over a nonlinear stretching sheet incorporating thermophoresis and Brownian motion is *** a similarity method to reshape the underlying partial differential equations into a set of ordinary differential equations(ODEs),the implications of heat generation,and chemical reaction on the flow field are described in *** a Homotopy analysis method(HAM)is used to interpret the related *** is found that an increase in the magnetic and velocity exponent parameters can damp the fluid velocity,while thermophoresis and Brownian motion promote specific thermal *** results also demonstrate that as the Brownian motion parameter is increased,the concentration values become smaller.

关键词： Hiemenz flow MHD thermal radiation nonlinear stretching chemical reaction HAM

Microstructure,mechanical and corrosion behavior of high strength AA7075aluminium alloy friction stir welds-Effect of post weld heat treatment

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Defence Technology（防务技术） 2015年第4期11卷 362-369页

作者： p.vijaya Kumar G.Madhusudhan Reddy K.Srinivasa Rao Department of Mechanical Engineering R.I.T. Defence Metallurgical Research Laboratory Department of Metallurgical Engineering Andhra University

High strength aluminium alloy AA7075(Al-Zn-Mg-Cu) is a precipitate hardenable alloy widely used in the aerospace,defense,marine and automobile *** of the heat treatable aluminium alloys in all these sectors is ever-increasing owing to their excellent strength-toweight ratio and reasonably good corrosion *** shortage in corrosion resistance,however,usually poses negative concern about their reliability and lifetime when they service in the variable marine *** alloys also exhibit low weldability due to poor solidification microstructure,porosity in fusion zone and lose their mechanical properties when they are welded by fusion welding *** stir welding(FSW) is a reliable technique to retain the properties of the alloy as the joining takes place in the solid *** welds are susceptible to corrosion due to the microstructural changes in the weld nugget during *** this work,the effect of post weld treatments,viz.,peak aging(T6) and retrogression & reaging(RRA),on the microstructure,mechanical properties and pitting corrosion has been *** stir welding of 8 mm-thick AA7075 alloy was carried *** microstructural changes of base metal and nugget zone of friction stir welds were studied using optical microscopy,scanning electron microscopy and transmission electron *** and hardness test of base metal and welds has been carried *** corrosion resistance was determined through dynamic polarization *** was observed that the hardness and strength of weld were observed to be comparatively high in peak aged(T6) condition but the welds showed poor corrosion *** resistance to pitting corrosion was improved and the mechanical properties were maintained by RRA *** resistance to pitting corrosion was improved in RRA condition with the minimum loss of weld strength.

关键词： 7075铝合金高强度铝合金搅拌摩擦焊耐腐蚀性热处理效果微观结构焊缝机械性能

Microstructure and pitting corrosion of armor grade AA7075 aluminum alloy friction stir weld nugget zone-Effect of post weld heat treatment and addition of boron carbide

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Defence Technology（防务技术） 2015年第2期11卷 166-173页

作者： p.vijaya KUMAR G.MADHUSUDHAN REDDY K.SRINIVASA RAO Department of Mechanical Engineering R.I.T. Defence Metallurgical Research Laboratory Department of Metallurgical Engineering Andhra University

Friction stir welding(FSW) of high strength aluminum alloys has been emerged as an alternative joining technique to avoid the problems during fusion *** recent times FSW is being used for armor grade AA7075 aluminum alloy in defense,aerospace and marine applications where it has to serve in non uniform loading and corrosive *** though friction stir welds of AA7075 alloy possess better mechanical properties but suffer from poor corrosion *** present work involves use of retrogression and reaging(RRA) post weld heat treatment to improve the corrosion resistance of welded joints of aluminum *** attempt also has been made to change the chemical composition of the weld nugget by adding B4C nano particles with the aid of the FSW on a specially prepared base metal plate in butt *** effects of peak aged condition(T6),RRA and addition of B4C nano particles on microstructure,hardness and pitting corrosion of nugget zone of the friction stir welds of AA7075 alloy have been *** though RRA improved the pitting corrosion resistance,its hardness was slightly *** improvement in pitting corrosion resistance was achieved with addition of boron carbide powder and post weld heat treatment of RRA.

关键词： 7075铝合金搅拌摩擦焊焊后热处理碳化硼颗粒抗点蚀微观结构装甲 7075合金

INDUCTION OF RESISTANCE IN FRENCH BEAN USING AVIRULENT ISOLATE OF pSEUDOMONAS pHASEOLICOLA)

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INDUCTION OF RESISTANCE IN FRENCH BEAN USING AVIRULENT ISOLA...

palynofloral changes in the Upper paleozoic and Mesozoic of the Deocha-pachami area, Birbhum Coalfield, West Bengal, India

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作者： M.KRISHNAppA p.vijaya Department of Applied Botany Kuvempu University Jnana Sahyadri -577 451 Shimoga Dt.INDIA Department of Applied Botany Kuvempu University Jnana Sahyadri -577 451 Shimoga Dt.INDIA

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Science China Earth Sciences 2009年第12期52卷 1932-1952页

作者： vijaya Birbal Sahni Institute of palaeobotany 53 University Road Lucknow 226007 India

The study of Upper paleozoic and Mesozoic palynomorphs in three boreholes from the Deocha-pachami area, Birbhum Coalfield, West Bengal, India, has allowed dating of the Talchir, Barakar, Dubrajpur, and Rajmahal formations, and revealed many hiatuses. The lowermost unit, the Talchir Formation, yielded earliest permian palynomorphs. The Barakar Formation, which includes coal-bearing strata, was previously dated as Early permian. However, data presented herein indicate an Early permian to earliest Triassic age for this unit,containing actually the Karharbari, Barakar s.s., Kulti, and Ranigang formations as well as the basal part of the panchet Formation. The overlying Dubrajpur Formation is Jurassic (Callovian to Tithonian), with an unconformity at its base. The uppermost Dubrajpur Formation is Tithonian-Berriasian. The palynomorphs from the intertrappeans within the Rajmahal Formation suggest an Early Cretaceous age. The revised ages of the Barakar and Dubrajpur formations are of major regional significance. The distribution patterns of spore-pollen may provide a broad spectrum of paleoclimate during permian, Late Jurassic, and Early Cretaceous times, as there is no record of marine signatures in the study area.

关键词： Talchir to Rajmahal formations Upper paleozoic Mesozoic spores and pollen biostratigraphy India

Species diversity of birds in mangroves of Kundapura, Udupi District, Karnataka, Southwest Coast of India

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Journal of Forestry Research 2014年第3期25卷 661-666页

作者： vijaya Kumar K.M vijaya Kumara Department of Zoology Bhandarkars’ Arts and Science College Department of post Graduate Studies and Research in Wildlife and Management Bioscience Block Kuvempu University

We quantified species diversity of birds in mangroves at Kundapura from April-2010 to March-2013. We recorded 79 species of 36 families and 14 orders. Of these 71% are resident species, 22% are residential migrants and 8% are migratory. One endangered species, three near threatened species, and a few occasional visitors were re-corded. Species diversity and abundance of birds were greater during from October through May as there was availability of food, increased vegetation and the arrival of migratory birds. Minimum diversity was recorded from June through September owing to heavy rains, increased flow of water, limited availability of food and return of migratory birds.

关键词： Species, mangroves, birds, threatened migratory

Improved deep mixed kernel randomized network for wind speed prediction

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Clean Energy 2023年第5期7卷 1006-1031页

作者： vijaya Krishna Rayi Ranjeeta Bisoi S.p.Mishra p.K.Dash Department of EEE GMR Institute of TechnologyRajamAndhra PradeshIndia Multidisciplinary Research Cell Siksha‘O’Anusandhan Deemed to be UniversityBhubaneswarOdishaIndia

Forecasting wind speed is an extremely complicated and challenging problem due to its chaotic nature and its dependence on several atmospheric *** there are several intelligent techniques in the literature for wind speed prediction,their accuracies are not yet very ***,in this paper,a new hybrid intelligent technique named the deep mixed kernel random vector functional-link network auto-encoder(AE)is proposed for wind speed *** proposed method eliminates manual tuning of hidden nodes with random weights and biases,providing prediction model generalization and representation *** reduces reconstruction error due to the exact inversion of the kernel matrix,unlike the pseudo-inverse in a random vector functional-link network,and short-ens the execution ***,the presence of a direct link from the input to the output reduces the complexity of the prediction model and improves the prediction *** kernel parameters and coefficients of the mixed kernel system are optimized using a new chaotic sine–cosine Levy flight optimization *** lowest errors in terms of mean absolute error(0.4139),mean absolute percentage error(4.0081),root mean square error(0.4843),standard deviation error(1.1431)and index of agreement(0.9733)prove the efficiency of the proposed model in comparison with other deep learning models such as deep AEs,deep kernel extreme learning ma-chine AEs,deep kernel random vector functional-link network AEs,benchmark models such as least square support vector machine,autoregressive integrated moving average,extreme learning machines and their hybrid models along with different state-of-the-art methods.

关键词： deep neural network mixed kernel random vector functional network auto-encoder chaotic sine-cosine Levy flight optimization single and multistep wind speed prediction

Effect of pressure and Temperature on phase Transformation and properties of Titanium Aluminide Obtained through Reaction Synthesis

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Journal of Materials Science & Technology 2010年第8期26卷 693-704页

作者： R.K.Gupta Bhanu pant vijaya Agarwala R.C.Agarwala p.p.Sinha Vikram Sarabhai Space Centre ISROTrivandrum-695 022India Indian Institute of Technology Roorkee

Reaction synthesis process has been used to develop γ titanium aluminide using elemental powders. powder mixture of Ti-48 at. pct AI was prepared in ball mill and reaction synthesis was carried out in hot press with varying temperature and pressure. Titanium aluminide synthesized under high pressure and temperature resulted in better properties with respect to densification, homogenization response, mechanical properties and oxidation resistance as compared to that synthesized under low pressure and temperature. AI rich phases were observed in as-synthesized condition in all the experiments. However, some Ti rich phases were also found in high pressure-temperature synthesized samples. Density, hardness and tensile strength have been correlated with applied pressure through empirical relations. Variation in density with pressure is found to be logarithmic whereas hardness and tensile strength variation with pressure is polynomial.

关键词： Titanium aluminide Reaction synthesis phase transformation