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Order Bounded Weighted Composition Operators Mapping into the Dirichlet Type Spaces

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Chinese Annals of Mathematics,Series B 2016年第4期37卷 585-594页

作者： Yongxin GAO sanjay kumar Zehua ZHOU Department of Mathematics Tianjin UniversityTianjin 300072China. Department of Mathematics Central University of JammuINDIA. Center for Applied Mathematics Tianjin UniversityTianjin 300072China.

The authors characterize the order boundedness of weighted composition operators acting between Dirichlet type spaces.

关键词： Weighted composition operator Order boundedness Dirichlet typespaces Positive Borel measure

Liquefaction proneness of stratified sand-silt layers based on cyclic triaxial tests

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第7期15卷 1826-1845页

作者： Arpit Jain Satyendra Mittal sanjay kumar Shukla Department of Civil Engineering Indian Institute of TechnologyRoorkeeUttarakhandIndia School of Engineering Edith Cowan UniversityJoondalupPerthAustralia Department of Civil Engineering Indian Institute of Technology MadrasChennaiIndia Department of Civil Engineering BIT SindriIndia

Most studies on liquefaction have addressed homogeneous soil strata using sand or sand with fine content without considering soil *** this study,cyclic triaxial tests were conducted on the stratified sand specimens embedded with the silt layers to investigate the liquefaction failures and void-redistribution at confining stress of 100 kPa under stress-controlled *** loosening of underlying sand mass and hindrance to pore-water flow caused localized bulging at the sand-silt *** is observed that at a silt thickness of 0.2H(H is the height of the specimen),nearly 187 load cycles were required to attain liquefaction,which was the highest among all the silt thicknesses with a single silt ***,0.2H is assumed as the optimum silt thickness(t_(opt)).The silt was placed at the top,middle and bottom of the specimen to understand the effect of silt layer *** to the increase in depth of the silt layer from the top position(capped soil state)to the bottom,the cycles to reach liquefaction(N_(cyc,L))increased 2.18 ***,when the number of silt layers increased from single to triple,there was an increase of about 880%in N_(cyc,L).The micro-characterization analysis of the soil specimens indicated silty materials transported in upper sections of the specimen due to the dissipated pore *** main parameters,including thickness(t),location(z),cyclic stress ratio(CSR),number of silt layers(n)and modified relative density(D_(r,m)),performed significantly in governing the lique-faction *** this,a multilinear regression model is developed based on critical parameters for prediction of N_(cyc,L).Furthermore,the developed constitutive model has been validated using the data from the present study and earlier findings.

关键词： Cyclic triaxial tests Soil stratification Soil liquefaction Regression model

Experimental study on repeatedly loaded foundation soil strengthened by wraparound geosynthetic reinforcement technique

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Journal of Rock Mechanics and Geotechnical Engineering 2021年第4期13卷 899-911页

作者： Muhammad Nouman Amjad Raja sanjay kumar Shukla Geotechnical and Geoenvironmental Engineering Research Group School of EngineeringEdith Cowan UniversityJoondalupPerthWA 6027Australia Department of Civil Engineering School of EngineeringUniversity of Management and TechnologyLahorePakistan Civil Engineering Department Delhi Technological UniversityDelhiIndia

In the recent past,the potential benefits of wraparound geosynthetic reinforcement technique for constructing the reinforced soil foundations have been *** paper presents the experimental study on the behaviour of model strip footing resting on sandy soil bed reinforced with geosynthetic in wraparound and planar forms under monotonic and repeated *** geosynthetic layers were laid according to the reinforcement ratio to minimise the scale *** is found that for the same amount of reinforcement material,the wraparound reinforced model resulted in less settlement in comparison to planar reinforced *** efficiency of wraparound reinforced model increased with the increase in load amplitude and the rate of total cumulative settlement substantially decreased with the increase in number of load *** wraparound reinforced model has shown about 45% lower average total settlement in comparison to unreinforced model,while the double-layer reinforced model has about 41% lower average total settlement at the cost of approximately twice the material and 1.5 times the occupied land width ***,wraparound models have shown much greater stability in comparison to their counterpart models when subjected to incremental repeated loading.

关键词： Geosynthetics Repeated loads Wraparound reinforcement technique Model tests Footing settlement Bearing capacity Reinforcement ratio Strip footing

Ultra-minimally invasive endoscopic techniques and colorectal diseases:Current status and its future

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Artificial Intelligence in Gastrointestinal Endoscopy 2024年第2期5卷 15-30页

作者： Nalini Kanta Ghosh Ashok kumar Department of Surgical Gastroenterology Sanjay Gandhi Post Graduate Institute of Medical SciencesLucknow 226014Uttar PradeshIndia

Colorectal diseases are increasing due to altered lifestyle,genetic,and environmental *** plays an important role in *** in colonoscope(ultrathin scope,magnetic scope,capsule)and technological gadgets(Balloon assisted scope,third eye retroscope,NaviAid G-EYE,dye-based chromoendoscopy,virtual chromoendoscopy,narrow band imaging,i-SCAN,etc.)have made colonoscopy more comfortable and *** in-vivo microscopy can be performed using confocal laser endomicroscopy,optical coherence tomography,spectroscopy,*** developments in diagnostic colonoscopy,therapeutic colonoscopy has improved to manage lower gastrointestinal tract bleeding,obstruction,perforations,resection polyps,and early colorectal *** introduction of combined endo-laparoscopic surgery and robotic endoscopic surgery has made these interventions *** role of artificial intelligence in the diagnosis and management of colorectal diseases is also increasing day by ***,this article is to review cutting-edge developments in endoscopic principles for the management of colorectal diseases.

关键词： Colorectal disorders Ultra-minimally invasive scopes Advanced gadgets Endoscopic intervention Combined endo-laparoscopic surgery

A fuzzy time series forecasting method induced by intuitionistic fuzzy sets

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International Journal of Modeling, Simulation, and Scientific Computing 2015年第4期6卷 130-152页

作者： sanjay kumar Sukhdev Singh Gangwar G.B.Pant University and Agriculture and Technology Pantnagar UttarakhandIndia

Intuitionistic fuzzy sets(IFSs)are well established as a tool to handle the hesitation in the decision *** this research paper,fuzzy sets induced by IFS are used to develop a fuzzy time series forecasting model to incorporate degree of hesitation(nondeterminacy).To improve the forecasting accuracy,induced fuzzy sets are used to establish fuzzy logical *** verify the performance of the proposed model,it is implemented on one of the benchmarking time series ***,developed forecasting method is also tested and validated by applying it on a financial time series *** order to show the accuracy in forecasting,the method is compared with other forecasting methods using different error measures.

关键词： Fuzzy time series intuitionistic fuzzy sets nondeterminacy induced fuzzy set data models.

An incremental learning approach for the text categorization using hybrid optimization

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International Journal of Intelligent Computing and Cybernetics 2019年第3期12卷 333-351页

作者： Mamta Kayest sanjay kumar Jain Department of Computer Engineering National Institute of Technology KurukshetraKurukshetraIndia

Purpose–Document retrieval has become a hot research topic over the past few years,and has been paid more attention in browsing and synthesizing information from different *** purpose of this paper is to develop an effective document retrieval method,which focuses on reducing the time needed for the navigator to evoke the whole document based on contents,themes and concepts of ***/methodology/approach–This paper introduces an incremental learning approach for text categorization using Monarch Butterfly optimization–FireFly optimization based Neural Network(MB–FF based NN).Initially,the feature extraction is carried out on the pre-processed data using Term Frequency–Inverse Document Frequency(TF–IDF)and holoentropy to find the keywords of the ***,cluster-based indexing is performed using MB–FF algorithm,and finally,by matching process with the modified Bhattacharya distance measure,the document retrieval is *** MB–FF based NN,the weights in the NN are chosen using MB–FF ***–The effectiveness of the proposed MB–FF based NN is proven with an improved precision value of 0.8769,recall value of 0.7957,F-measure of 0.8143 and accuracy of 0.7815,***/value–The experimental results show that the proposed MB–FF based NN is useful to companies,which have a large workforce across the country.

关键词： Text categorization Monarch butterfly optimization Neural network Holoentropy,Cluster-based indexing Data mining

Peristaltic transport in an elastic tube under the influence of dilating forcing amplitudes

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International Journal of Biomathematics 2020年第4期13卷 167-179页

作者： sanjay kumar Pandey Amirlal Singh Department of Mathematical Sciences Indian Institute of Technology(BHU)Varanasi-221005 India

We investigate flow through an elastic tube which is constrained to a prescribed external forcing consisting of a progressive travelling *** a flow dynamics is closely related to that in the oesophageal *** mechanics of the tube is characterized by a relationship between transmural pressure difference and radial variation of the *** radial variation,assumed to be small,is studied by perturbation *** demonstrate that the elasticity of the tube plays a significant role in the flow *** increment in the forcing amplitude of the inward radial force enhances pressure,time-averaged volume flow rate and hence axial and radial *** is revealed that the elastic nature of the oesophageal tube favors swallowing.

关键词： Peristalsis oesophagus elastic tube dilating forcing amplitude

High viscosity of ionic liquids causes rate retardation of Diels-Alder reactions

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Science China Chemistry 2012年第8期55卷 1633-1637页

作者： kumar Anil PAWAR sanjay S. Physical Chemistry Division National Chemical Laboratory

Second order rate constants, ka have been determined for three bi-molecular Diels-Alder reactions to demonstrate that the high viscosity of ionic liquids can be a detrimental property in carrying out Diels-Alder reactions, if ionic liquids are employed as solvent media. It is possible to enhance the reaction rates of the reaction if a co-solvent is mixed in pure ionic liquid used as a solvent.

关键词： ionic liquids viscosity kinetics Diels.Alder reactions

Polysiloxane coatings on microspheres based on Multiphase Flow with Interface Exchange-Discrete Element Modelling

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Particuology 2022年第10期20卷 88-99页

作者： sanjay kumar Devendhar Singh Jean-FranCois Dietiker Kathy Lu Department of Materials Science and Engineering Virginia Polytechnic Institute and State UniversityBlacksburgVirginia 24061USA National Energy Technology Laboratory PittsburghPA 15236USA Leidos Research Support Team PittsburghPA 15236-0940USA

Polysiloxane coatings on yttria stabilized zirconia(YSZ)microspheres of 500μm were simulated in a spout fluidized bed coater using Multiphase Flow with Interface Exchange-Discrete Element Modelling(MFiX-DEM).Two different coater configurations were developed to study the influence of gas velocity and its distribution on particle *** presence of the Wurster tube not only enhances the dis-tribution but also increases the overall residence time of the *** were also carried out with different Wurster tube positions(normal,10%and 20%lowered from its initial position).Among these,20%lowered Wurster tube position demonstrated the most effective coating *** effects of gas inlet pressure on the average gas velocity and the distribution of particles were *** than 97%of the particles can be *** derived results,including average gas velocity,particle retention percentage,and distribution of particles with gas velocity,are being used to guide the experimental work in obtaining defect-free coatings for YSZ microspheres.

关键词： Spouted bed Wurster tube Coating Yttria stabilized zirconia(YSZ) MFiX