1,722,297 research outputs found
Fixed Point Theorems for Generalized Weakly Contractive Condition in Ordered Metric Spaces
Get PDFAltun, Ishak/0000-0002-7967-0554; NASHINE, HEMANT KUMAR/0000-0002-0250-9172; NASHINE, HEMANT KUMAR/0000-0002-0250-9172Fixed point results with the concept of generalized weakly contractive conditions in complete ordered metric spaces are derived. These results generalize the existing fixed point results in the literature
A common fixed point theorem on ordered metric spaces
No full textNASHINE, HEMANT KUMAR/0000-0002-0250-9172; Altun, Ishak/0000-0002-7967-0554; NASHINE, HEMANT KUMAR/0000-0002-0250-9172A common fixed point result for weakly increasing mappings satisfying generalized contractive type of Zhang in ordered metric spaces are derived
Fixed point theorems for a pair of mappings satisfying a generalized weakly contractive condition in ordered metric spaces
Get PDFNASHINE, HEMANT KUMAR/0000-0002-0250-9172; Altun, Ishak/0000-0002-7967-0554; NASHINE, HEMANT KUMAR/0000-0002-0250-9172Fixed point theorems for a pair of mappings which satisfy the condition of being generalized weakly contractive in complete ordered metric spaces are derived. At the end of the paper, applications of the previous results to new fixed point results of integral type are also shown
New fixed point results for maps satisfying implicit relations on ordered metric spaces and application
No full textNASHINE, HEMANT KUMAR/0000-0002-0250-9172; NASHINE, HEMANT KUMAR/0000-0002-0250-9172; Altun, Ishak/0000-0002-7967-0554We give some fixed point results for one and two mappings satisfying an implicit relation involving control function on ordered complete metric spaces. We furnish suitable examples to demonstrate the validity of the hypotheses of our results. We also give an application of our results to nonlinear Volterra integro-differential equations. (C) 2014 Elsevier Inc. All rights reserved
Resume of Hemant Kumar Bhargava, 1990-12
Get PDFNaval Postgraduate School Faculty ResumeIn December 1989, he joined the faculty of the Naval Postgraduate School as an Assistant Professor of Information Systems
Resume of Hemant Kumar Bhargava, 1993-10
Get PDFNaval Postgraduate School Faculty ResumeIn December 1989, he joined the faculty of the Naval Postgraduate School as an Assistant Professor of Information Systems
Fixed Point Results in Orbitally Complete Partial Metric Spaces
No full textNASHINE, DR HEMANT KUMAR/0000-0002-0250-9172In this paper, we prove two fixed point theorems for maps that satisfy a contraction principle involving a rational expression in complete partial metric spaces.Science Citation Index Expande
Lumped Track Layout Design for Dynamic Wireless Charging of Electric Vehicles
No full textDynamic wireless charging (DWC) of electric vehicles (EVs) is an emerging technology that could lead to the breakthrough of EVs. The technology is based on the inductive coupling between an electrified track deployed under the road surface and a pickup coil fitted in EV. This paper refers to a lumped track made of DD coils and is concerned with the design of the track layout, namely coil dimension in the motion direction and track coil distance for a given energy requirement. This paper starts by comparing the coupling characteristics of DD coils with different dimensions by a finite-element method (FEM) analysis. Afterward, an analytical procedure is developed to establish the track coil distance able to transfer to a moving EV the propulsion energy required per unit of traveled space. The procedure utilizes the DD-coil coupling characteristics to calculate the power and, from it, the energy transferred from the track coils to the pickup coil along the track. Instrumental in the calculation is the definition of a parameter, denoted as track flux coverage, which gives the ratio between the dimension of the track coils in the motion direction and the coil distance; such a parameter corresponds to the percentage of road populated with track coils so that it is a cost index of the DWC system implementation. Effects of a lateral displacement of the EV motion from the line joining the track coil centers are also analyzed. Design findings are checked against the results obtained with a computer-assisted analysis
Design of DWC System Track with Unequal DD Coil Set
No full textDynamic wireless charging powers electric vehicles
(EVs) even when they are moving on the road. In recent
years, the track arrangement of lumped type has been investigated
and the double-D (DD) shape has been found as the
most appropriate for the track and pickup coil set. This paper
investigates an unequal DD (UDD) configuration for the coil
set that offers better continuity in powering EVs during their
motion and reduces the cost of track deployment. The coupling
properties of the UDD coil set have been examined with the
help of the JMAG-Designer tool and experimentally verified
on a small-scale prototype. Then a design procedure of the
track is elaborated, intended to establish the dimensions and
distance of the track coils as a function of the power and voltage
specifications of the dc–dc converter connected to the EV dc link.
Finally, a design example is reported and the charging capabilities
of the resulting track are explored with the help of the PSIM
simulation tool
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