检索结果-南通市图书馆

Response of Photonic Hydrogels of Homogeneous Particles to Uranyl Ions in Aqueous Solutions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonic Sensors 2023年第4期13卷 50-61页

作者： R.G.JOSHI deepak k.gupta P.AMESH P.k.PARIDA T.R.RAVINDRAN Materials Science Group Indira Gandhi Centre for Atomic ResearchA CI of Homi Bhabha National InstituteKalpakkam 603102India Materials Chemistry and Metal Fuel Cycle Group Indira Gandhi Centre for Atomic ResearchA CI of Homi Bhabha National InstituteKalpakkam 603102India Metallurgy and Materials Group Indira Gandhi Centre for Atomic ResearchA CI of Homi Bhabha National Institute(HBNI)Kalpakkam 603102India

We study here the response of photonic hydrogels(PHs),made of photonic crystals of homogeneous silica particles in polyacrylamide hydrogels(SPHs),to the uranyl ions 22 UO_(2)^(2+) in aqueous *** is found that the reflection spectra of the SPH show a peak due to the Bragg diffraction,which exhibits a blue shift in the presence of 22 UO_(2)^(2+).Upon exposure to the SPH,22 UO_(2)^(2+)gets adsorbed on the SPH and forms complex coordinate bonds with multiple ligands on the SPH,which causes shrinking of hydrogel and leads to the blue shift in the diffraction *** amount of the blue shift in the diffraction peak increases monotonically up to 22 UO_(2)^(2+)concentrations as high as 2300μ*** equilibration time for the shift in the Bragg peak upon exposure to 22 UO_(2)^(2+)is found to be~30 *** results are in contrast to the earlier reports on photonic hydrogels of inhomogeneous microgel particles hydrogel(MPH),which shows the threshold 22 UO_(2)^(2+)concentration of~600μM,below which the diffraction peak exhibits a blue shift and a change to a red shift above *** equilibration time for MPH is~300 *** observed monotonic blue shift and the faster time response of the SPH to 22 UO_(2)^(2+)as compared to the MPH are explained in terms of homogeneous nature of silica particles in the SPH,against the porous and polymeric nature of microgels in the *** also study the extraction of 22 UO_(2)^(2+)from aqueous solutions using the *** extraction capacity estimated by the arsenazo-III analysis is found to be 112 mM/kg.

关键词： Photonic hydrogels uranium extraction and monitoring arsenazo-Ⅲ-uranium complex polyacrylamide hydrogel UV-visible spectroscopy

Performance evaluation of cement-stabilized pond ash-rice husk ashclay mixture as a highway construction material

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 Rock Mechanics and Geotechnical Engineering 2017年第1期9卷 159-169页

作者： Deepak.gupta Arvind kumar Department of Civil Engineering National Institute of Technology (NIT) Jalandhar India

This paper reports the results of an investigation carried out on clay soil stabilized with pond ash(PA),rice husk ash(RHA) and cement. Modified Proctor compaction tests were performed in order to investigate the compaction behavior of clay, and California bearing ratio(CBR) tests were performed to determine the strength characteristics of clay. For evaluation purpose, the specimens containing different amounts of admixtures were prepared. Clay was replaced with PA and RHA at a dosage of 30%e45% and5%e20%, respectively. The influence of stabilizer types and dosages on mechanical properties of clay was evaluated. In order to study the surface morphology and crystallization characteristics of the soil samples, scanning electron microscopy(SEM) and X-ray diffraction(XRD) analyses were carried out,respectively. The results obtained indicated a decrease in the maximum dry density(MDD) and a simultaneous increase in the optimum moisture content(OMC) with the addition of PA and *** linear regression analysis(MLRA) showed that the predicted values of CBR tests are in good agreement with the experimental values. Developed stabilized soil mixtures showed satisfactory strength and can be used for construction of embankments and stabilization of sub-grade soil. The use of locally available soils, PA, RHA, and cement in the production of stabilized soils for such applications can provide sustainability for the local construction industry.

关键词： California bearing ratio(CBR) Pond ash(PA) Rice husk ash(RHA) Optimum moisture content(OMC) Maximum dry density(MDD)

Integrated Multi-stage LQR Power Oscillation Damping FACTS Controller

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2018年第1期4卷 83-92页

作者： Rajendra k.Pandey deepak kumar gupta Department of Electrical Engineering Indian Institute of Technology(Banaras Hindu University)Varanasi-221005India

This paper presents an approach for oscillation damping with an integrated multi-stage linear quadratic regulator(MSLQR)FACTS controller combining power oscillation damping(POD)*** particle swarm optimization(PSO)technique has been used for precise tuning initial control parameters of power system stabilizers(PSS)and FACTS devices(such as STATCOM and UPFC)which results in improved controller *** is observed that the proposed control structure damps the oscillations adequately and is modular in design *** sample power system comprising six areas is considered to demonstrate the effectiveness of the proposed *** states inter-relation which is shown with eigenvalues reflects better regulation with the proposed *** step response also validates the controller performance.

关键词： Integral time multiplied by absolute error(ITAE) multi-stage linear quadratic regulator(MSLQR) particle swarm optimization(PSO) power oscillation damping controller STATCOM UPFC

A Systematic Review on the Internet of Medical Things:Techniques,Open Issues,and Future Directions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2023年第11期137卷 1525-1550页

作者： Apurva Sonavane Aditya khamparia Deepak.gupta School of Computer Science and Engineering Lovely Professional UniversityPunjab144411India Department of Computer Science Babasaheb Bhimrao Ambedkar UniversitySatellite CentreTikarmafiAmethi227413India Department of Computer Science Maharaja Agrasen Institute of TechnologyNew Delhi110086India

IoT usage in healthcare is one of the fastest growing domains all over the world which applies to every age *** of Medical Things(IoMT)bridges the gap between the medical and IoT field where medical devices communicate with each other through a wireless communication *** in IoMT makes human lives easy and *** paper provides a comprehensive detailed literature survey to investigate different IoMT-driven applications,methodologies,and techniques to ensure the sustainability of IoMT-driven *** limitations of existing IoMTframeworks are also analyzed concerning their applicability in real-time driven systems or *** addition to this,various issues(gaps),challenges,and needs in the context of such systems are *** purpose of this paper is to interpret a rigorous review concept related to IoMT and present significant contributions in the field across the research ***,this paper discusses the opportunities and prospects of IoMT and discusses various open research problems.

关键词： Internet ofMedical Things(IoMT) healthcare systems sensors preprocessing RFID remote monitoring devices networks

Extending blending proportions of ordinary Portland cement and calcium sulfoaluminate cement blends:Its effects on setting,workability,and strength development

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 1249-1260页

作者： Guangping HUANG deepak PUDASAINEE Rajender gupta Wei Victor LIU Department of Civil and Environmental Engineering University of AlbertaEdmonton T6G 1H9Canada Department of Chemical and Materials Engineering University of AlbertaEdmonton T6G 1H9Canada

This study extended blending proportion range of ordinary Portland cement(OPC)and calcium sulfoaluminate(CSA)cement blends,and investigated effects of proportions on setting time,workability,and strength development of OPC-CSA blend-based *** analysis(TGA)and X-ray diffraction(XRD)were conducted to help understand the performance of OPC-CSA blend-based *** setting time of the OPC-CSA blends was extended,and the workability was improved with increase of OPC *** the early-age strength decreased with increase of OPC content,the strength development was still very fast when the OPC content was lower than 60%due to the rapid formation and accumulation of *** 2 h,the OPC-CSA blend-based mortars with OPC contents of 0%,20%,40%,and 60%achieved the unconfined compressive strength(UCS)of 17.5,13.9,9.6,and 5.0 MPa,*** OPC content had a negligible influence on long-term *** 90 d,the average UCS of the OPC-CSA blend-based mortars was 39.2±1.7 MPa.

关键词： calcium sulfoaluminate cement cement blends hydration reaction setting workability compressive strength

Three-stage algorithms for the large-scale dynamic vehicle routing problem with industry 4.0 approach

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Management Analytics 2022年第3期9卷 313-329页

作者： Maryam Abdirad krishna krishnan Deepak.gupta Department of Industrial Systemsand Manufacturing EngineeringWichita State UniversityWichitaKS 67260USA

Companies are eager to have a smart supply chain especially when they have adynamic system. Industry 4.0 is a concept which concentrates on mobility andreal-time integration. Thus, it can be considered as a necessary component thathas to be implemented for a dynamic vehicle routing problem. The aim of thisresearch is to solve large-scale DVRP (LSDVRP) in which the delivery vehiclesmust serve customer demands from a common depot to minimize transit costswhile not exceeding the capacity constraint of each vehicle. In LSDVRP, it isdifficult to get an exact solution and the computational time complexity growsexponentially. To find near-optimal answers for this problem, a hierarchicalapproach consisting of three stages: “clustering, route-construction, routeimprovement”is proposed. The major contribution of this paper is dealing withLSDVRP to propose the three-stage algorithm with better results. The resultsconfirmed that the proposed methodology is applicable.

关键词： dynamic vehicle routing problem clustered vehicle routing problem three-stage algorithm industry 4.0

A two-stage metaheuristic algorithm for the dynamic vehicle routing problem in Industry 4.0 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

Journal of Management Analytics 2021年第1期8卷 69-83页

作者： Maryam Abdirad krishna krishnan Deepak.gupta Department of Industrial Systemsand Manufacturing EngineeringWichita State UniversityWichitaKSUSA

Industry 4.0 is a concept that assists companies in developing a modern supply chain(MSC)system when they are faced with a dynamic *** Industry 4.0 focuses on mobility and real-time integration,it is a good framework for a dynamic vehicle routing problem(DVRP).This research works on *** aim of this research is to minimize transportation cost without exceeding the capacity constraint of each vehicle while serving customer demands from a common ***,new orders arrive at a specific time into the system while the vehicles are executing the delivery of existing *** paper presents a two-stage hybrid algorithm for solving the *** the first stage,construction algorithms are applied to develop the initial *** the second stage,improvement algorithms are *** results were designed for different sizes of *** results show the effectiveness of the proposed algorithm.

关键词： dynamic vehicle routing problem Industry 4.0 two-stage algorithm heuristic algorithms

Humans and Robots: A Mutually Inclusive Relationship in a Contagious World

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2021年第2期18卷 185-203页

作者： Akash gupta Anshuman Singh deepak Bharadwaj Amit kumar Mondal Department of Mechanical Engineering University of Petroleum and Energy StudiesDehradun 248007India Department of Systems Engineering University of MarylandCollege ParkMaryland 20742USA Department of Mechatronics Engineering Manipal Academy of Higher EducationDubai 345050UAE

The coronavirus global pandemic has spread faster and more severely than experts had *** this has presented itself as a great challenge,researchers worldwide have shown ingenuity and dexterity in adapting technology and devising new strategies to combat this ***,implementing these strategies alone impedes the nature of everyone′s daily ***,an intersection between these strategies and the technological advantages of robotics,artificial intelligence,and autonomous systems is essential for near-to-normal *** this review paper,different applications of robotic systems,various aspects of modern technologies,including medical imaging,telemedicine,and supply chains,have been covered with respect to the COVID-19 ***,concerns over user′s data privacy,job losses,and legal aspects of the implementation of robotics are also been discussed.

关键词： COVID-19 coronavirus telepresence delivery robots medical robots

Reflection of plane waves from a micropolar thermoelastic solid half-space with impedance boundary conditions

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean Engineering and Science 2019年第2期4卷 122-131页

作者： Baljeet Singh Anand kumar Yadav Deepak.gupta Department of Mathematics Post Graduate Government CollegeSector 11ChandigarhIndia Department of Mathematics M.M.University MullanaAmbalaIndia

In this paper,the governing equations of linear,isotropic,homogeneous and generalized micropolar thermoelasticity are specialized in a *** governing equations are solved for plane harmonic wave *** separate velocity equations are obtained which indicate the existence of four plane waves with distinct speeds.A problem on reflection of plane waves from a thermally insulated/isothermal surface is considered with impedance boundary *** potentials for incident and reflected waves are formulated which satisfy the boundary conditions at a plane *** between reflection coefficients as well as the expressions of energy ratios for various reflected waves are *** illustration,the reflection coefficients and energy ratios of reflected waves are computed for relevant material parameters of an aluminium-epoxy *** of impedance parameters on all reflected waves is shown graphically at each angle of incidence.

关键词： Micropolar thermoelasticity Impedance boundary Plane waves Reflection coefficients Energy ratios.