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Structure, composition and diversity of tree species in tropical moist deciduous forests of Eastern India: a case study of Nayagarh Forest Division, Odisha

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Journal of Forestry Research 2017年第6期28卷 1212-1223页

作者： tirthabrata sahoo Pratap Chandra Panda Laxmikanta Acharya Taxonomy and Conservation Division Regional Plant Resource Centre Nayapalli Bhubaneswar Odisha 751015India Centre of Biotechnology Sikshya O Anusandhan UniversityGhatikia Bhubaneswar Odisha 751003 India

Quantitative assessment of tree species diversity from sample plots in seven forest ranges of Nayagarh Forest Division in Odisha state in the Eastern Ghats of India was made during the period April, 2011 to November, 2013. A total of 120 transects(1000 m × 5 m) were laid in Nayagarh, Odogaon, Pancharida, Khandapada, Dasapalla,Mahipur, and Gania forest ranges and tree stems of at least 30 cm GBH were measured. The regeneration potential of trees was assessed from 5 m × 5 m sample plots located within the main transect. A total of 177 tree species belonging to 120 genera and 44 families were recorded from the study area. Shorea robusta, Buchanania lanzan, Lannea coromandelica, Terminalia alata and Cleistanthus collinus were the predominant tree species. The stand density varied in the range of 355.33–740.53 stems ha)-1) while basal area ranged from 7.77 to 31.62 m2ha-1. The tree density and species richness decreased with increasing girth class. The highest number of species and maximum density was recorded in the girth class of 30–60 cm. The Shannon–Weiner and Simpson Indices with respect to trees with C30 cm GBH varied in the range of 2.07–3.79 cm and 0.03–0.37 cm respectively and the values of diversity indices are within the reported range for tropical forests of Indian sub-continent. The families, Dipterocarpaceae,Anacardiaceae, Combretaceae and Euphorbiaceae contributed to maximum species richness, stand density, and basal area. Regeneration of many tree species was observed to be poor. The present study provides baseline data for further ecological studies, forest management, and formulation of site-specific strategies for conservation of biological diversity in moist deciduous forests of Eastern India.

关键词： Eastern India Nayagarh Forest Division Odisha Tree diversity

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Performance Analysis of 5 G Wireless Hybrid Precoding Using Evolutionary Algorithms

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Journal of Bionic Engineering 2023年第5期20卷 2317-2330页

作者： Madhusmita sahoo Harish Kumar sahoo Department of ECE ITERSiksha O Anusandhan UniversityJagamaraBhubaneswarOdisha751030India Department of Electronics and Telecommunication Engineering Veer Surendra Sai University of TechnologyBurlaSambalpurOdisha768018India

Emerging 5G communication solutions utilize the millimeter wave(mmWave)band to alleviate the spectrum *** the mmWave range,Multiple Input Multiple Output(MIMO)technologies support a large number of simultaneous *** mmWave MIMO wireless systems,hybrid analog/digital precoding topologies provide a reduced complexity substitute for digital *** Error Rate(BER)and Spectral efficiency performances can be improved by hybrid Minimum Mean Square Error(MMSE)precoding,but the computation involves matrix inversion *** number of antennas at the broadcasting and receiving ends is quite large for mm-wave MIMO systems,thus computing the inverse of a matrix of such high dimension may not be practically *** to the need for matrix inversion and known candidate matrices,the classic Orthogonal Matching Pursuit(OMP)approach will be more *** novelty of research presented in this manuscript is to create a hybrid precoder for mmWave communication systems using metaheuristic algorithms that do not require matrix inversion *** metaheuristic approach has not employed much in the formulation of a precoder in wireless *** distinct evolutionary algorithms,such as Harris–Hawks Optimization(HHO),Runge–Kutta Optimization(RUN),Slime Mould Algorithm(SMA),Hunger Game Search(HGS)Algorithm and Aquila Optimizer(AO)are considered to design optimal hybrid precoder for downlink transmission and their performances are tested under similar practical *** to simulation studies,the RUN-based precoder performs better than the conventional algorithms and other nature-inspired algorithms based precoding in terms of spectral efficiency and BER.

关键词： Millimeter wave Hybrid precoding MIMO HHO HGS RUN SMA.AO

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Progress on Medical Implant:A Review and Prospects

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Journal of Bionic Engineering 2023年第2期20卷 470-494页

作者： Ankur Pandey Swagatadeb sahoo Department of Electronics and Communication Engineering National Institute of Technology JamshedpurJamshedpurJharkhand831014India

Medical implant from different materials such as metals,ceramics,polymers and composites have gained a lot of research attraction due to wide applications in medical industry for treatment,surgical operations and preparing artificial body *** this work,we highlight a comprehensive review of medical implant mechanism,various types of implant materials,factors affecting the performance of implant and different characterization *** review provides an overall summary of the state-of-the-art progress on various interesting and promising material-based medical ***,few new prospects are explained from the established theoretical and experimental results for real-life *** study is expected to promote extended interest of scientists and engineers in recent trend of modern biomaterials based medical implant.

关键词： Implant material Biocompatibility Hydroxyapatite Dielectric constant

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Hydrodynamic behaviour of Cellets^(TM)(***./USP)in a spouted bed using image processing method

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Particuology 2023年第5期76卷 101-112页

作者： Jagadeeswari Vanamu Abanti sahoo Department of Chemical Engineering National Institute of Technology RourkelaRourkela.769008India

The hydrodynamic behaviour of the spouted bed in the pharmaceutical industries has been found to be less *** present paper has focused on the hydrodynamic characteristics of a spouted bed where the Cellets^(TM)(***./USP)is adopted as the bed *** are carried out with three different static bed heights(H_(0))of shallow depth(2D_(i)≤H_(0)<3D_(i))using two different particle *** spouted bed employed with D_(i)/D_(0) of 5 has given the experimental information on external spouting(Ues)by mapping the pressure drop,and fountain height(H_(f))against the superficial gas velocity(U_(g))is rep-resented with the image contours,which show the intrinsic *** the 1000 μm and 700 μm particles have been found to exhibit symmetric and asymmetric *** increasing U_(g),the fully suspended particles are limited to a certain height in the freeboard region due to the gas-solid cross-flow,which implies the clusters have identified with the image processing method.

关键词： External spouting velocity Fountain height Clusters Bed expansion ratio

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Effects of slip, viscous dissipation and Joule heating on the MHD flow and heat transfer of a second grade fluid past a radially stretching sheet

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Applied Mathematics and Mechanics(English Edition) 2010年第2期31卷 159-173页

作者： Bikash sahoo Department of Mathematics National Institute of Technology

The flow and heat transfer of an electrically conducting non-Newtonian second grade fluid due to a radially stretching surface with partial slip is considered. The partial slip is controlled by a dimensionless slip factor, which varies between zero （total adhesion） and infinity （full slip）. Suitable similarity transformations are used to reduce the resulting highly nonlinear partial differential equations into ordinary differential equations. The issue of paucity of boundary conditions is addressed and an effective numerical scheme is adopted to solve the obtained differential equations even without augmenting any extra boundary conditions. The important findings in this communication are the combined effects of the partial slip, magnetic interaction parameter and the second grade fluid parameter on the velocity and temperature fields. It is interesting to find that the slip increases the momentum and thermal boundary layer thickness. As the slip increases in magnitude, permitting more fluid to slip past the sheet, the skin friction coefficient decreases in magnitude and approaches zero for higher values of the slip parameter, i.e., the fluid behaves as though it were inviscid. The presence of a magnetic field has also substantial effects on velocity and temperature fields.

关键词： second grade fluid stretching sheet partial slip heat transfer finitedifference method Broyden's method

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Enhanced time response and temperature sensing behavior of thermistor using Zn-doped CaTiO_3 nanoparticles

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Journal of Advanced Ceramics 2018年第2期7卷 99-108页

作者： Subhanarayan sahoo Department of Electrical Engineering Adani Institute of Infrastructure Engineering

In the present study, Zn-doped CaTiO_3 nanocrystalline was synthesized to study the thermistor behavior with temperature. The X-ray powder diffraction analysis showed the formation of a single-phase orthorhombic structure at room temperature. The electrical resistance of the Zn-doped CaTiO_3 increased with increasing doping concentration and decreased at higher measuring temperature, showing a negative temperature coefficient of resistance(NTCR) behavior. Different thermistor parameters were calculated using Steinhart–Hart equations, whilst time domain analysis confirmed faster response towards applied voltage.

关键词： multiferroic X-ray diffraction (XRD) electrical properties conductivity impedance spectroscopy NTCR thermistor

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ANN modeling for diffusivity of mushroom and vegetables using a fluidized bed dryer

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Particuology 2013年第5期11卷 607-613页

作者： Subasini Jena Abanti sahoo Chemical Engineering Department National Institute of TechnologyRourkela 769008OrissaIndia

Drying characteristics in terms of diffusivity were studied for mushrooms and different vegetables in a fluidized bed dryer. Drying characteristics with falling rate regime were computed for all the sampi^z. Effective diffusivity of each sample was calculated. Mass transfer coefficients were determined. Mass transfer kinetics for drying of different samples was also found out. Correlations for the diffusivity of samples were developed by relating the experimentally observed data with the different system parame- ters on the basis of regression analysis. The developed correlations for effective moisture diffusivity of the samples are validated by artificial neural network （ANN） modeling. Finally calculated values of diffusivity obtained through both the methods are compared with the experimentally measured values which show a very good approximation thereby indicating the wide applicability of the developed correlations for industrial uses.

关键词： Activation energyEffective diffusivityDrying rateMass transfer kineticsRegression analysisArtificial neural network

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Segregation characteristics of irregular binaries in gas solid fluidized beds——An ANN-approach

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Particuology 2008年第3期6卷 199-206页

作者： Abanti sahoo Gopendra Kishore Roy Department of Chemical Engineering National Institute of TechnologyRourkela769008 OrissaIndia

Binary mixtures of irregular materials of different particle sizes and/or particle densities are fluidized in a 15-cm diameter column with a perforated plate distributor. An attempt has been made in this work to determine the segregation characteristics of jetsam particles for both the homogeneous and heterogeneous binary mixtures in terms of segregation distance by correlating it to the various system parameters, viz. initial static bed height, height of a layer of particles above the bottom grid, superficial gas velocity and average particle size and/or particle densities of the mixture through the dimensional analysis. Correlation on the basis of Artificial Neural Network approach has also been developed with the above system parameters thereby authenticating the development of correlation by the former approach. The calculated values of the segregation distance obtained for both the homogeneous and heterogeneous binary mixtures from both the types of ftuidized beds （i.e. under the static bed condition and the ftuidized bed condition） have also been compared with each other.

关键词： Gas-solid fluidization Segregation distance Static bed condition Fluidized bed condition Irregular binaries and artificial neural network

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Investigation into machining performance of microstructurally engineered in-situ particle reinforced magnesium matrix composite

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Journal of Magnesium and Alloys 2023年第3期11卷 916-935页

作者： S.K.sahoo B.N.sahoo S.K.Panigrahi Department of Mechanical Engineering Indian Institute of Technology MadrasChennai 600036India Applied Magnesium Research Group Center of Excellence in Materials and Manufacturing for Futuristic MobilityIndian Institute of Technology MadrasChennai 600036India Department of Mechanical Engineering Sardar Vallabhbhai National Institute of TechnologySurat 395007India

Magnesium and magnesium in-situ composites have significant potential in the application of design and manufacturing for automotive and aerospace industries because of their high specific strength and reduced fuel *** there are many challenges for machining of Mg based alloys and composites because of the high tendency of fire and *** challenges can be minimized through microstructural *** this present study,the machining performances of AZ91 Mg alloy and in-situ hybrid TiC+TiB_(2)reinforced AZ91 metal matrix composite was *** effectβ-Mg_(17)Al_(12)phases and grain refinement with and without in-situ particles on machinability were studied through microstructural engineering via aging and friction stir *** end milling operation was carried out at different cutting speeds ranging from 25 mm/min to 90 mm/min under dry environment by using an AlTiN-coated tungsten carbide *** optimum cutting speed for machining was found to be 75 mm/min based on the surface roughness values of all conditioned *** base material with dendritic microstructure was found to have poor machinability in terms of inadequate surface finish and edge-burrs *** combined effect of in-situ TiC+TiB_(2)particles addition and grain refinement enhanced the machining performance of the material with superior surface finish,negligible edge-burr formation and better tool wear *** influence of in-situ TiC+TiB_(2)particles,β-Mg_(17)Al_(12)phases and grain refinement on machining characteristics are explained based on the tool wear mechanisms,chip behavior and machining induced affected zone.

关键词： Magnesium In-situ composite End-milling Tool wear Chip morphology

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A Generalized Cubic Functional Equation

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Acta Mathematica Sinica,English Series 2005年第5期21卷 1159-1166页

作者： P.K.sahoo Department of Mathematics University of LouisvilleLouisvilleKentucky 40292USA

In this paper, we determine the general solution of the functional equation f1 （2x ＋ y）＋ f2（2x - y） = f3（x ＋ y）＋ f4（x - y）＋ f5（x） without assuming any regularity condition on the unknown functions f1,f2,f3, f4, f5 ： R→R. The general solution of this equation is obtained by finding the general solution of the functional equations f（2x ＋ y）＋ f（2x - y） = g（x ＋ y）＋ g（x - y）＋ h（x） and f（2x ＋ y） - f（2x - y） = g（x ＋ y） - g（x - y）. The method used for solving these functional equations is elementary but exploits an important result due to Hosszfi. The solution of this functional equation can also be determined in certain type of groups using two important results due to Szekelyhidi.

关键词： Additive function Cubic functional equation Difference operator Frechet functional equation Jensen functional equation n-additive function

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