检索结果-南通市图书馆

Photocatalytic degradation of the diazo dye naphthol blue black in water using MWCNT/Gd,N,S-TiO_2 nanocomposites under simulated solar light

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2015年第7期27卷 219-228页

作者： Gcina Mamba Xavier Yangkou Mbianda ajay Kumar Mishra Department of Applied Chemistry University of Johannesburg Faculty of Science DST-NRF Centre of Excellence in Strong Materials School of Physics University of the Witwatersrand Nanotechnology and Water Sustainability Unit College of Engineering Science and Technology University of South Africa Florida Campus

A simple sol-gel method was employed to prepare gadolinium, nitrogen and sulphur tridoped titania decorated on oxidised multiwalled carbon nanotubes（MWCNT/Gd,N,S-Ti O2）, using titanium（IV） butoxide and thiourea as titanium and nitrogen and sulphur source, respectively. Samples of varying gadolinium loadings（0.2%, 0.6%, 1.0% and3.0% Gd3＋） relative to titania were prepared to investigate the effect of gadolinium loading and the amounts of carbon nanotubes, nitrogen and sulphur were kept constant for all the samples. Furthermore, the prepared nanocomposites were evaluated for the degradation of naphthol blue black（NBB） in water under simulated solar light irradiation. Higher degradation efficiency（95.7%） was recorded for the MWCNT/Gd,N,S-Ti O2（0.6% Gd）nanocomposites. The higher photocatalytic activity is attributed to the combined effect of improved visible light absorption and charge separation due to the synergistic effect of Gd,MWCNTs, N, S and Ti O2. Total organic carbon（TOC） analysis revealed a higher degree of complete mineralisation of naphthol blue black（78.0% TOC removal） which minimises the possible formation of toxic degradation by-products such as the aromatic amines. The MWCNT/Gd,N,S-Ti O2（0.6% Gd） was fairly stable and could be re-used for five times,reaching a maximum degradation efficiency of 91.8% after the five cycles.

关键词： Gadolinium MWCNTs NBB Simulated solar light Tridoped titania

Performance of water-based drilling fluids for deepwater and hydrate reservoirs:Designing and modelling studies

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2021年第6期18卷 1709-1728页

作者： Moumita Maiti Ajoy Kumar Bhaumik ajay Mandal Department of Petroleum Engineering Indian Institute of Technology(Indian School of Mines)DhanbadIndia Department of Applied Geology Indian Institute of Technology(Indian School of Mines)DhanbadIndia

In deepwater drilling,the properties of water-based drilling fluids change remarkably due to low temperature and high pressure,which have a significant effect on lost circulation,wellbore instability and the window between pore pressure and fracturing *** present work investigates the influence of low temperature and high pressure on polymer and nanoparticle(boron nitride(BN))based drilling fluids with an aim to improve their rheological properties and fluid loss *** amplitude and frequency sweep tests were conducted to understand the viscoelastic nature of the *** amplitude sweep tests confirmed the structural stability of the designed fluid within the studied sweep *** study reveals that storage modulus(G')and loss modulus(G")of the samples are enhanced with increasing concentration of BN *** viscoelastic range also increases due to the intermolecular interaction within the structure of the fluid in the presence of the *** the linear viscoelastic range(LVER),all the samples show the dominance of elastic modulus than viscous modulus which delineates the solid-like *** results of rheological tests of drilling fluid containing BN nanoparticles indicate a significant reduction in plastic viscosity(PV),yield point(YP)and apparent viscosity(AV).The rheological studies conducted at different temperatures(from 10℃to-5℃)and pressures(from 7.8 MPa toll MPa)reveal the minimum effect of pressure and temperature on the rheology of samples,which are desirable for their applications in hydrate and deepwater *** filtration loss experiments conducted at 30℃and 0.69 MPa show a large reduction in fluid loss volume(60.6%)and filter cake thickness(90%)for the sample with 0.4 wt%BN nano particles compared to that of the sample without *** filter cake permeability is also in the favourable range with0.008 mD which shows a 94%reduction compared to the sample without nanoparticles.A regres

关键词： Deepwater drilling fluid Filtrate loss Gas hydrate Rheology Nanoparticle-based drilling fluid

Spectroscopic properties of Δ baryons

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2021年第2期45卷 119-125页

作者： Chandni Menapara Zalak Shah ajay Kumar Rai Department of Applied Physics Sardar Vallabhbhai National Institute of TechnologySurat-395007GujaratIndia

The resonance state of theΔ baryon,which exists in four isospin(I=3/2)states,has been studied using the hypercentral constituent quark model(hCQM)with a simple linear potential with added first order *** calculated data ranges for 1S-5S,1P-5P,1D-4D and 1F-2F are given,with possible spin-parity assignments for all the *** magnetic moments have also been obtained for all four ***\pidecay channel width has been calculated for a few *** linear nature of the data has been verified through Regge trajectories.

关键词： mass spectra light baryon magnetic moment Regge trajectory

Design,challenges,and the potential of transcriptomics to understand social behavior

在线全文

学校读者我要写书评

暂无评论

Current Zoology 2020年第3期66卷 321-330页

作者： Wen Kin LIM ajay S.MATHURU Science Division Yale-NUS College12 College Avenue W estSingapore Institute of Molecular and Cell Biology(IMCB) 61 Biopolis DriveSingapore Department of Physiology Yong Loo Lin School of Medicine(YLL)National University of SingaporeSingapore

Rapid advances in Ribonucleic Acid sequencing(or RNA-seq)technology for analyzing entire transcriptomes of desired tissue samples,or even of single cells at scale,have revolutionized biology in the past *** accessibility and falling costs are making it possible to address many problems in biology that were once considered intractable,including the study of various social ***-seq is opening new avenues to understand long-standing questions on the molecular basis of behavioral plasticity and individual variation in the expression of a *** whole transcriptomes are examined,it has become possible to make unbiased discoveries of underlying mechanisms with little or no necessity to predict genes involved in ***,researchers need to be aware of technical limitations and have to make specific decisions when applying RNA-seq to study social ***,we provide a perspective on the applications of RNA-seq and experimental design considerations for behavioral scientists who are unfamiliar with the technology but are considering using it in their research.

关键词： behavioral variability behavioral plasticity neurotranscriptomics RNA-seq social behaviors

Current innovations and future prospects of metal oxide electrospun materials for supercapacitor technology:A review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第35期166卷 208-233页

作者： Sonali ajay Beknalkar Aviraj Mahadev Teli Jae Cheol Shin Division of Electronics and Electrical Engineering Dongguk University-Seoul30Pildong-roJung-guSeoul 04620South Korea

Metal oxides with one-dimensional(1-D)nanostructures have shown promise as electrode materials for supercapacitors due to their unique properties,such as high aspect ratio,increased interaction between electrode and electrolyte,favourable mechanical strength,and short ion transportation pathways that im-prove the charge-discharge rates of electrons and *** is an effective technique for cre-ating 1-D metal oxide nanostructures that produce highly porous nanofibrous structures with exceptional specific surface areas,predictable pore size distributions,and tunable interconnected *** paper provides a comprehensive review of the literature on electrospun metal oxide nanostructures for superca-pacitors,including the principles and key parameters of electrospinning,an overview of supercapacitors,the charge storage mechanism of electrospun metal oxides,and recent developments in 1-D electrospun nanostructures,from binary to ternary metal *** review also discusses unresolved issues and future directions in this research ***,this paper offers valuable insights into the latest devel-opments,unresolved issues,and prospects of 1-D nanostructured metal oxides fabricated through elec-trospinning for supercapacitor applications,providing a critical analysis of their potential in this rapidly evolving field.

关键词： Electrospinning Supercapacitor Metal oxides New strategies Nanofibers

Seismic response of precast reinforced concrete wall subjected to cyclic in-plane and constant out-of-plane loading

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2021年第5期15卷 1128-1143页

作者： Shubham SINGHAL ajay CHOURASIA Soraj Kumar PANIGRAHI Yogesh KAJALE Council of Scientific and Industrial Research Central Building Research InstituteRoorkee 247667India Academy of Scientific and Innovative Research(AcSIR) Ghaziabad 201002India BG Shirke Construction Technology Pvt.Ltd. Pune 411036India

This paper provides insight into the seismic behavior of a full-scale precast reinforced concrete wall under in-plane cyclic loading combined with out-of-plane loading replicated by sand backfill to simulate the actual condition of basement *** tested wall exhibited flexural cracks,owing to the high aspect ratio and considerable out-of-plane movement due to lateral pressure from the *** wall performed satisfactorily by exhibiting competent seismic parameters and deformation characteristics governed by its ductile response in the nonlinear phase during the test with smaller residual *** analysis was conducted to validate experimental findings,which complied with each *** numerical model was used to conduct parametric studies to study the effect of backfill density and aspect ratio on seismic response of the proposed precast wall *** in-plane capacity of walls reduced,while deformation characteristics were unaffected by the increase in backfill *** increase in aspect ratio leads to a reduction in in-plane capacity and an increase in *** between the ratio of in-plane yield capacity and design shear load of walls are proposed for the backfill density,which may be adopted to determine the in-plane yield capacity of the basement walls based on their design shear.

关键词： precast wall basement wall out-of-plane response quasi-static test sand backfill seismic parameters

Mixing and segregation of binary mixtures of biomass and silica sand in a fluidized bed

在线全文

学校读者我要写书评

暂无评论

Particuology 2021年第5期19卷 58-73页

作者： Tolu Emiola-Sadiq Jiachen Wang Lifeng Zhang ajay Dalai Department of Chemical and Biological Engineering University of Saskatchewan.SaskatoonSK S7N 5A9Canada

In this work,mixing and segregation of binary mixtures involving biomass materials in a fluidized bed was experimentally investigated.A frozen bed method was employed to investigate both axial and radial distribution of biomass particles in silica *** different biomass materials were studied:willow sawdust,pelletized soy and oat hull *** loading investigated ranged from 5% to 30% by *** extent of mixing for each of the biomass composition was investigated using Lacey’s mixing index which is based on the standard deviations of the sample at different axial positions in the *** radial composition was also investigated by means of digital imaging analysis using a high-resolution digital *** experiments revealed the differences in the extent of particle distribution for pelletized biomass materials vs non-densified materials as a result of differences in particle size,density and importantly,the particle shape of the materials *** results showed an increase in the extent of mixing as the fluidizing velocity increased for both pellet materials while the mixing index for sawdust decreased beyond a loading of 20%.With an increase in biomass loading,an increase in mixing index was found for the two pellet materials.A similar trend was observed for sawdust at the lower loading ***,the mixing index started to decrease at higher loading level beyond 20%.The results greatly contributed to the understanding of the hydrodynamics of binary and multicomponent mixtures involving biomass materials,especially pelletized materials in fluidized beds.

关键词： Mixing Segregation Biomass Binary Fluidization Pellets

Analysis on Critical Success Factors for Agile Manufacturing Evaluation in Original Equipment Manufacturing Industry-An AHP Approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2016年第5期29卷 880-888页

作者： C ajay Guru Dev V S Senthil Kumar Department of Mechanical Engineering CEG Anna University

Manufacturing industries are facing challenges in the implementation of agile manufacturing in their products and processes. Agility is widely accepted as a new competitive concept in the manufacturing sector in fulfilling varying customer demand. Thus, evaluation of agile manufacturing in industries has become a necessity. The success of an organisation depends on its ability to manage finding the critical success factors and give them special and continued attention in order to bring about high performance. This paper proposes a set of critical success factors （CSFs） for evaluating agile manufacturing considered appropriate for the manufacturing sector. The analytical hierarchy process （AHP） method is applied for prioritizing the success factors, by summarizing the opinions of experts. It is believed that the proposed CSFs enable and assist manufacturing industries to achieve a higher performance in agile manufacturing so as to increase competitiveness.

关键词： critical success factor analytic hierarchy process pairwise comparison

Spectroscopy of light N~* baryons

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2019年第3期43卷 49-55页

作者： Zalak Shah Keval Gandhi ajay Kumar Rai Department of Applied Physics Sardar Vallabhbhai National Institute of Technology

We present the masses of N baryons up to 3300 MeV. The radial and orbital excited states are determined using hypercentral constituent quark model with the first-order correction. The obtained masses are compared with the experimental results and other theoretical predictions. The Regge trajectories are also determined in(n, M^2) and(J, M^2) planes. Moreover, the magnetic moments with J^p =(1^+/2,1^-/2) are calculated. We also calculates the Nπ decay width of excited nucleons.

关键词： baryons potential model Regge trajectories