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Studies on the spin-state equilibria of cobalt ions in the system La1-x Na x Co1-x Nb x O3 (x≤0·40)

Parkash, O.; Chaturvedi, N.; Tiwari, M.; Kumar, D. (Springer India, 1989-03)

The spin-state equilibria of cobalt ions in the system La1-x Na x Co1-x Nb x O3 (x≤0·40) has been studied by measuring its magnetic susceptibility as a function of temperature in the range 300-600 K. It is found that the ...
Model reduction by extended minimal degree optimal Hankel norm approximation

Kumar, Deepak; Nagar, S.K. (Elsevier Inc., 2013-12-04)

This paper presents an extended minimal degree optimal Hankel norm approximation (MDOHNA) based order reduction algorithm using a basis-free descriptor which circumvents the requirement of computing balanced realized model ...
Color Directional Local Quinary Patterns for Content Based Indexing and Retrieval

Vipparthi, Santosh Kumar; Nagar, Shyam Krishna (springer berlin, 2014-12-01)

This paper presents a novel evaluationary approach to extract color-texture features for image retrieval application namely Color Directional Local Quinary Pattern (CDLQP). The proposed descriptor extracts the individual ...
Exponentiated Weibull distribution approach based inflection S-shaped software reliability growth model

Sagar, B.B.; Saket, R.K.; Singh, Col. Gurmit (Ain Shams University, 2015-07-10)

The aim of this paper was to estimate the number of defects in software and remove them successfully. This paper incorporates Weibull distribution approach along with inflection S-shaped Software Reliability Growth Models ...
Application of Various Order Reduction Methodologies Over Power System Components

Choudhary, Amit Kumar; Nagar, Shyam Krishna (Elsevier B.V., 2015-12)

Study and analysis of highly interconnected electrical system is time consuming and difficult; and appearance of inner uncertainty, result in system complexity with higher order, posing a great challenge to both system ...
Optimal Placement of DG in Distribution network for Power loss minimization using NLP & PLS Technique

Babu, P. Vijay; Singh, S.P. (Elsevier Ltd, 2016-12)

A novel application of General Algebraic Modelling System (GAMS) software has been reported in this paper to determine the load flow solution for both radial and mesh distribution network. With interfacing of GAMS and ...
Load Shedding in Deregulation Environment and Impact of Photovoltaic System with SMES

Singh, Shailendra; Tyagi, Deepak; Kumar, Ashwani; Chanana, Saurabh (Elsevier Ltd, 2016-12)

With the continuous increase in the load, the frequency of the system goes on decreasing and it reaches to its minimum allowable value after the further increase in load will result in more frequent drop resulting in the ...
Revisiting Approximation Techniques to Reduce Order of Interval System

Choudhary, Amit Kumar; Nagar, Shyam Krishna (Elsevier B.V., 2016-12)

Large interconnected modules result in complex system of higher order and often of interval structure, making the overall study and analysis, time consuming and complicated. Accepting the challenge to state an approximate ...
Fractional order PI controller design for non-monotonic phase systems

Verma, Santosh Kumar; Yadav, Shekhar; Nagar, Shyam Krishna (Elsevier B.V., 2016-12)

In this paper, a fractional order proportional-integral (FOPI) controller is proposed for controlling the non-monotonic decreasing phase DC-buck regulator system. The parameters of FOPI controller are optimized by Nelder's-Mead ...
Optimized PID Controller for Magnetic Levitation System

Yadav, Shekhar; Verma, S. K.; Nagar, S. K. (Elsevier B.V., 2016-12)

In this paper, an optimized proportional-integral-derivative (PID) controller is designed to control the ball position of the magnetic levitation system (MLS). The electromagnetic force of the MLS is controlled by sensing ...
Novel arrangement of Routh array for order reduction of z-domain uncertain system

Choudhary, Amit Kumar; Krishna Nagar, Shyam (Taylor and Francis Ltd., 2017-04-09)

This paper presents a novel arrangement of Routh table array for deriving an approximate model of a higher order z-domain uncertain system. The demand for this computation is to procure a lower order model which is easy ...
Performance enhancement of magnetic levitation system using teaching learning based optimization

Yadav, Shekhar; Verma, Santosh Kumar; Nagar, Shyam Krishna (2017-08-23)

This paper demonstrates the potency of evolution based optimization techniques in the sense of enhancing the system’s performance. Teaching Learning Based Optimization (TLBO) is a well-known evolutionary algorithm used ...
On-line assessment of voltage stability using synchrophasor technology

Singh, S. P., Singh, S. P. (Institute of Advanced Engineering and Science, 2017-10)

Series of blackouts encountered in recent years in power system have been occurred because either of voltage or angle instability or both together was not detected within time and progressive voltage or angle instability ...
Influence of Rotor Magnet Shapes on Performance of Axial Flux Permanent Magnet Machines

Praveen Kumar*; Rakesh K. Srivastava (Electromagnetics Academy, 2018)

Axial flux Permanent Magnet (AFPM) machines, due to its high torque capability, high power density and compact size, are the most suitable candidates for in-wheel Electric Vehicle application. However, the presence of ...
Design of a Circular Polarized Printed Rectenna for Satellite Solar Power Station Array Construction

Deepak Kumar; Kalpana Chaudhary (Science Publishing Corporation Inc, 2018)

A circularly polarized single feed microstrip patch antenna with voltage doubler rectification is designed at 2.45 GHz for satellite solar wireless power transfer application. A bandpass filter is also designed and combined ...
Satellite solar wireless power transfer for baseload ground supply: clean energy for the future

Kalpana Chaudhary, Kalpana; Deepak Kumar, Deepak (Springer Berlin Heidelberg, 2018)

Many factors are influencing the acceptability of energy technology. The transformation of the energy sector is looking for clean energy technology that is also suitable for baseload power generation. Terrestrial solar ...
A Novel Methodology for Identifying Cross-Country Faults in Series-Compensated Double Circuit Transmission Lines

Singh, S.; Vishwakarma, D.N. (Elsevier B.V., 2018)

In this paper, a competent mechanism for classifying cross-country faults in series-compensated (SC) double circuit transmission line (DCTL) is presented. Cross-country faults are usually different from frequently occurring ...
Semi-analytical model for Skewed magnet axial flux machine

Reza, M.M.; Srivastava, R.K. (Electromagnetics Academy, 2018)

High power density and torque capability are distinguished features of slotted axial flux permanent magnet machine. However, due to alternate placement of slot and teeth, the airgap permeance and airgap magnetic energy ...
Lyapunov Function Analysis for System with Stochastic Nonsmooth PI Controller

Kumar, D.; Kamal, S.; Kumar, T.S.; Ghosh, S. (Elsevier B.V., 2018)

This paper deals with non-smooth feedback stabilisation in presence of stochastic unbounded(normally distributed) noise. The integral term of classical proportional-integral controller is replaced by a discontinuous ...
Energy saving estimation in distribution network with smart grid-enabled CVR and solar PV inverter

Singh, S.; Singh, S.P. (Institution of Engineering and Technology, 2018-03-27)

Estimation of energy savings in distribution network through smart grid-enabled conservation of voltage reduction (CVR) approach has been investigated in this study. To achieve higher-energy savings, CVR operation has been ...

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