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CsEE Journal of Power and Energy systems 2021年第3期7卷 567-581页

作者： Tejavathu Ramesh kandipati Rajani Anup kumar panda Department of Electrical Engineering National Institute of Technology RourkelaIndia Department of Electrical and Electronics Engineering National Institute of Technology Andhra PradeshIndia

Partial shadings cause output power reduction from Photovoltaic(PV)arrays due to mismatch *** selection of PV array configurations play a vital role in maximum power *** paper proposes a novel Triple-Tied-Cross-Linked(T-T-C-L)configuration to extract maximum power with a lesser number of cross ties than a Total-Cross-Tied(T-C-T)*** performance of the proposed T-T-C-L configuration has been compared with various conventional PV array configurations,such as series(s),Parallel(P),series-Parallel(s-P),Bridge-Link(B-L),Honey-Comb(H-C),and T-C-T under Partial shading Conditions(PsCs)by considering the 9×9 PV *** PsCs considered are uneven row,column,diagonal,random,short&narrow,short&wide,long&narrow,long&wide shadings and uniform half module *** measures,such as open circuit voltage,short circuit current,maximum power,voltages and currents at maximum power,mismatch losses,fill factor and efficiency have been used for performance analysis of various *** the results,it can be concluded that the performance of the proposed T-T-C-L configuration is optimal compared to other configurations.

关键词： Efficiency fill factor maximum power point mismatch losses partial shading conditions PV array configurations triple-tied-cross-linked

solvent extraction of neodymium(Ⅲ) from acidic nitrate medium using Cyanex 921 in kerosene

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Journal of Rare Earths 2012年第8期30卷 794-797页

作者： Nandita panda Niharbala Devi sujata Mishra Department of Chemistry Institute of Technical Education and Research Siksha 'O' Anusandhan deemed to be University

The extraction of neodymium（III） from acidic nitrate medium was investigated using Cyanex 921 as extractant in kerosene. The metal concentration in the aqueous phase before and after extraction was determined spectrophotometrically by Arsenazo III method. The complete equilibration was achieved in 15 rain. The effects of shaking time, nitric acid concentration, nitrate concentration, extractant concen- tration, and temperature on the extraction were studied. The extraction of Nd（III） was found to increase very slowly with increase in concen- tration of HNO3 in the range of 0.001-3.008 mol/L and then decreased when 0.01 mol/L HNO3 was used. The percentage of extraction was increased with increase in nitrate concentration from 0.01M）.45 mol/L and then decreased when nitrate concentration increased to 0.5 mol/L. Quantitative extraction of Nd（III）（98%） was obtained from the aqueous phase containing 0.001 mol/L HNO3 and 0.1 mol/L kNO3 using 0.5 mol/L Cyanex 921. On the basis of slope analysis, the extracted complex in the organic phase was proposed to be Nd（NO3）3.2Cyanex 921. The extraction of Nd（III） was found to increase with increase in concentration of metal ion in the range of 0.0014）.05 mol/L from 0.001 mol/L HNO3 and 0.1 mol/L kNO3 with 0.1 mol/L Cyanex 921. The percentage of extraction of neodymium was found to decrease with in- crease in temperature. From temperature variation studies, the negative value of AH indicated the extraction reaction to be exothermic and the negative value of As indicated the formation of a stable complex, Almost 100% Nd（III） was recovered from the fully loaded organic phase using 0.002 mol/L H2sO4 and 0.01 mol/L HCl.

关键词： extraction neodymium(III) acidic nitrate Cyanex 921 kerosene stripping rare earths

Extraction of Zr(IV) from hydrochloric acid with tri-octyl amine and Cyanex 921 in kerosene

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International Journal of Minerals,Metallurgy and Materials 2013年第9期20卷 823-828页

作者： Bhikari Charan Bhatta Nandita panda sujata Mishra Department of Chemistry College of Engineering and Technology Biju Pattanaik University of Technology Department of Chemistry Institute of Technical Education and Research Siksha O Anusandhan Deemed to be University

This article reports the extraction of zirconium （IV） from aqueous HC1 solution by tri-octyl amine （TOA）, Cyanex 921, and their binary mixture using kerosene as the diluent. The effect of some parameters on the extraction of Zr（IV） was investigated such as equilibration time, aqueous phase acidity, extractant molarity, chloride ion concentration, nature of diluents, and temperature. The extraction of Zr（IV） was found to be 99% from 7.5 M HC1 using the mixture of extractants containing 0.1 M TOA and 0.02 M Cyanex 921 in kerosene. kerosene was found to be the effective diluent for the extraction of Zr（IV） with the binary mixture of TOA and Cyanex 921. The positive enthalpy change and positive entropy change in the binary extraction system show the endothermic process with an increase in entropy. stripping of Zr（IV） from the loaded organic phase containing the mixture of TOA （0.1 M） and Cyanex 921 （0.02 M） indicates that HNO3 and Na2CO3 are the best stripping agents.

关键词： zirconium solvent extraction hydrochloric acid tri-octyl amine Cyanex 921 kerosene

Performance evaluation for selectivity of the flocculant on hematite in selective flocculation

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International Journal of Minerals,Metallurgy and Materials 2013年第12期20卷 1123-1129页

作者： Lopamudra panda Pradip k.Banerjee surendra kumar Biswal R.Venugopal N.R.Mandre Research and Development Tata Steel Ltd. Institute of Minerals and Materials Technology (Council of scientific and Industrial Research) Indian school of Mines University

Increased demand for iron ore necessitates the utilization of low-grade iron ore fines, slimes, and existing tailings. selective flocculation can be an alternative physico-chemical process for utilizing these low-grade fines, slimes, and tailings. In selective fiocculation, the most critical objective is the selection of proper reagents that will make fioc of desired minerals. In present study, selective flocculation was applied to ultra-fine synthetic mixtures of hematite and kaolinite, and the Fe value was upgraded up to 65.78% with the reduction of Al2O3 and siO2 values to 2.65% and 3.6670, respectively. Here, degraded wheat starch was used as a *** this process, separation occurs on the basis of the selectivity of the flocculant. The selectivity of the fiocculant can be quantified in terms of separation efficiency. Here, an attempt was also made to develop a correlation between separation efficiency and major operating parameters such as flocculent dose, pH value, and solid concentration to predict the separation performance.

关键词： hematite kaolinite selective fiocculation modeling iron ores tailings

Idiosyncratic behaviour of(Na_(0.49)5k_(0.455)Li_(0.05))(Nb_(0.95)Ta_(0.05))O_3-La_2O_3 ceramics: synergistically improved thermal stability, ageing, and fatigue properties

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Journal of Advanced Ceramics 2019年第1期8卷 79-89页

作者： Bhupender RAWAL N. N. WATHORE B.PRAVEENkUMAR H. s. panda Armament Research and Development Establishment Department of Materials Engineering Defence Institute of Advanced Technology

La_2 O_3 doped(Na0.495 k0.455 Li0.05)(Nb0.95 Ta0.05)O_3 ceramics are prepared using modified milling process, and the influences of La2 O3 on ferroelectric behaviour, ageing characteristics, thermal stability, electrical stability, crystal structure, microstructure, dielectric and piezoelectric properties were reported. La_2 O_3 addition improved the ferroelectric characteristic substantially, and obtained remnant polarization(Pr) and maximum strain(smax) around 34.3 C/cm^2 and 0.13% ***_2 O_3 doped ceramics improved the thermal stability and were stable up to 180 ℃ compared to undoped ceramics(120 ℃). The Rietveld refinement along with the high-temperature X-ray diffraction studies suggested the presence of monoclinic phase in La doped compositions, which is responsible for their idiosyncratic behaviour. The maximum values were obtained around 179 pC/N and 0.385 for piezoelectric constant(d33) and electromechanical coupling factor(kp) respectively in La_2 O_3 doped samples(0.02 wt%), which also exhibited the lowest ageing rate and stable electrical fatigue behaviour.

关键词： dielectric fatigue piezoelectric thermal stability

Artificial neural network approach to assess selective flocculation on hematite and kaolinite

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International Journal of Minerals,Metallurgy and Materials 2014年第7期21卷 637-646页

作者： Lopamudra panda P.k.Banerjee surendra kumar Biswal R.Venugopal N.R.Mandre R&D Tata steel Limited Institute of Minerals and Materials Technology(Council of scientific and Industrial Research) Department of Fuel & Minerals Engineering Indian School of Mines University

Because of the current depletion of high grade reserves, beneficiation of low grade ore, tailings produced and tailings stored in tailing ponds is needed to fulfill the market demand. selective flocculation is one alternative process that could be used for the beneficiation of ultra-fine material. This process has not been extensively used commercially because of its complex dependency on process parameters. In this paper, a selective flocculation process, using synthetic mixtures of hematite and kaolinite in different ratios, was attempted, and the ad-sorption mechanism was investigated by Fourier transform infrared （FTIR） spectroscopy. A three-layer artificial neural network （ANN） model （4？4？3） was used to predict the separation performance of the process in terms of grade, Fe recovery, and separation efficiency. The model values were in good agreement with experimental values.

关键词： hematite kaolinite flocculation artificial neural networks back propagation algorithm Fourier transform infrared spectroscopy separation efficiency

Compromising solution of Geometric Programming Problem with Bounded Parameters

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Journal of the Operations Research society of China 2017年第3期5卷 377-390页

作者： Mrinal Jana Geetanjali panda University of Petroleum and Energy studies Dehradun 248007India Department of Mathematics Faculty of MathematicsIndian Institute of Technology KharagpurKharagpur 721302West BengalIndia

This paper addresses a geometric programming problem,where the objective function and constraints are interval-valued *** concept of acceptable feasible region is introduced,and a methodology is developed to transform this model to a general optimization problem,which is free from interval ***ship between the solution of the original problem and the transformed problem is *** methodology is illustrated through numerical *** by the proposed method and previous methods are analyzed.

关键词： Interval-valued function Partial ordering Nonlinear programming Geometric programming Decision making

Experimental and numerical evaluation of multidirectional compressive and flexure behavior of three-dimensional printed concrete

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Frontiers of structural and Civil Engineering 2023年第11期17卷 1643-1661页

作者： Lalit kUMAR Dhrutiman DEY Biranchi panda Nelson MUTHU Department of Mechanical Engineering Indian Institute of Technology GuwahatiAssam 781039India

Three-dimensional concrete printing(3DCP)can proliferate the industrialization of the construction sector,which is notoriously conservative and indolent toward ***,the mechanical behavior of 3DCP should be characterized and modeled considering the interfaces when its performance is thoroughly compared to that of the existing concrete construction *** study presents an experimental and numerical investigation of uniaxial compression and three-point bending(TPB)tests on extruded 3DCP beams in different loading *** orientation of translational and depositional interfaces with respect to the direction of loading influenced the *** the elastic and post-damage behavior of the 3DCP specimens were compared with those of the conventionally cast specimen under quasi-static loading *** the higher compressive strength of the casted specimen,the flexural strength of the 3DCP specimens was *** study employed the finite element and cohesive zone models of the appropriate calibrated traction-separation law to model fracture in the notched TPB ***,the real-time acoustic emission test revealed the nature of failure phenomenon of three-dimensional-printed specimens under flexion,and accordingly,the cohesive law was *** predicted load-displacement responses are in good agreement with the experimental ***,the effects of cohesive thickness and notch shape on the performance under bending were explored through parametric studies.

关键词： three-dimensional printing anisotropy flexure compression cohesive zone model finite element model

Habitat heterogeneity influences avian feeding guild composition in urban landscapes:evidence from Bhubaneswar,India

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Ecological Processes 2021年第1期10卷 418-427页

作者： Bibhu Prasad panda B.Anjan kumar Prusty Biswajit panda Abanti Pradhan siba Prasad Parida Environmental sciences Department of Chemistry and BBRCITERSiksha‘O’Anusandhan(Deemed to be University)BhubaneswarOdishaIndia Department of Natural Resources Management and Geoinformatics Khallikote UniversityBerhampurOdishaIndia Department of stem Cell Facility All India Institute of Medical SciencesNew DelhiIndia Department of Zoology School of Applied SciencesCenturion University of Technology and ManagementBhubaneswarOdishaIndia.

Background:Habitat heterogeneity clearly distinguished in terms of availability of food and habitat resources and landscape features(natural or human-modified)play a crucial role in the avian species composition and population *** examine this,a study was carried out in Bhubaneswar,India,to understand the ecological niche distinction in birds based on habitat *** sampling was conducted in 30 sampling sites covering six different habitat types in a predominantly urban landscape of Bhubaneswar for understanding the ecological niche in *** birds were classified into 11 types of foraging ***:The insectivorous guild had the highest bird species richness(181 species)and the omnivorous guild had the lowest(11 species).The piscivorous guild and wetland habitat had the strongest linkage,followed by the insectivorous guild and agricultural *** frugivorous guild was significantly correlated with forest habitats(r=0.386,pk and garden habitats(r=0.281,ps urban area hosted a higher number of bird species in certain habitat types,viz.,agricultural lands(52%,115 species)and forest patches(50%,111 species).Conclusion:The present study highlights the importance of agricultural lands,forest patches,parks and gardens,and wetlands inside the cityscape for supporting *** is therefore suggested that such habitats should be conserved inside an urban area to protect native ***,the city development plan must invariably include strategies for conserving the forest patches inside the urban *** must be taken to restrain the degradation of agricultural lands and reduce their utilization for non-agricultural purposes,which will help in further reducing the bird population decline in the urban landscape.

关键词： Bird species richness Community structure Feeding guild Habitat characteristics Urban area

stationary Analysis and Optimal Control Under Multiple Working Vacation Policy in a GI/Ma,b/1 Queue

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Journal of systems science & Complexity 2018年第4期31卷 1003-1023页

作者： panda Gopinath BANIk Abhijit Datta GUHA Dibyajyoti school of Mathematical sciences National Institute of Science Education and Research Bhubaneswar-752050 India school of Basic sciences Indian Institute of Technology Bhubaneswar-752050 India International Management Institute Kolkata-700027 India

This paper considers an infinite buffer renewal input queue with multiple working vacation policy wherein customers are served by a single server according to general bulk service （a,b）-rule （1 ≤ a ≤ b）. If the number of waiting customers in the system at a service completion epoch （during a normal busy period） is lower than ＇a＇, then the server starts a vacation. During a vacation if the number of waiting customers reaches the minimum threshold size ＇a＇, then the server starts serving this batch with a lower rate than that of the normal busy period. After completion of a batch service during working vacation, if the server finds less than takes another vacation, otherwise the server rate. The maximum allowed size of a batch a＇ customers accumulated in the system, then the server continues to serve the available batch with that lower in service is ＇b＇. The authors derive both queue-length and system-length distributions at pre-arrival epoch using both embedded Markov chain approach and the roots method. The arbitrary epoch probabilities are obtained using the classical argument based on renewal theory. several performance measures like average queue and system-length, mean waiting-time, cost and profit optimization are studied and numerically computed.

关键词： Bulk service cost optimization mean idle period multiple working vacations roots method system-length