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Chemical reaction effect of an axisymmetric flow over radially stretched sheet

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Propulsion and Power Research 2019年第1期8卷 79-84页

作者： b.nayak S.R.Mishra G.Gopi Krishna Department of Mathematics Sikslia‘O’AnusandhanKhandagiriBhubaneswar 751030OdisaIndia Department of Mathematics Sri Venkateswara UniversityTirupatiIndia

A steady boundary layer flow over a porous flat plate has been considered in the present *** transfer analysis with first order chemical reaction is also considered instead of heat *** plate concentration is considered in the form of power law instead of taking *** goveming PDEs are transformed into ordinary differential equations using similarity transfomation and then these ODEs are solved by employing Runge-Kutta fourth order method associated with shooting technique.A parametric study of all involving parameters is obtained by the help of *** major findings are:(i)the concentration of the fluid in its boundary layer decrease with increase in heavier species,the reaction rate parameter and the power law exponent;(ji)the rate of mass transfer increases with an increase in reaction rafe parameter and power-law exponent.

关键词： Magnetohydrodynamic Mass transfer First order chemical reaction Runge-Kutta method Shooting technique

印度Ganga-Meghna-brahmaputra平原及周围地区与孟加拉国地下水砷污染及其对健康影响的19年研究

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中国地方病学杂志 2007年第1期26卷 43-47页

作者： Ahamed S Hossain MA Mukharjee A Sengupta MK Das b nayak b Pal A Mukherjee SC Pati S Dutta RN Saha KC Quamruzzaman Q Chakraborti D 付松波（译）孙殿军（审校）印度柯尔喀塔Jadavpur大学环境研究学院 700032 孟加拉围达卡大学统计研究与训练学院印度柯尔喀塔医学院神经科印度柯尔喀塔SSKM医院医学教育研究生学院妇产科印度柯尔喀塔热带病学研究院皮肤科孟加拉国Dhaka社区医院不详

基于近19年对印度Ganga—Meghna—brahmaputra（简称GMb）平原（面积569749km^2，人口超过5亿）地下水砷污染的调查，可以确定印度Ganga—brahmaputra平原（包括北方邦、比哈尔邦、恰尔康得邦、西孟加拉邦、阿萨姆邦）和孟加拉国普遍受... 详细信息

基于近19年对印度Ganga—Meghna—brahmaputra（简称GMb）平原（面积569749km^2，人口超过5亿）地下水砷污染的调查，可以确定印度Ganga—brahmaputra平原（包括北方邦、比哈尔邦、恰尔康得邦、西孟加拉邦、阿萨姆邦）和孟加拉国普遍受到砷的污染。近期的调查研究也表明，除米佐拉姆邦外，其他各邦的地下水也受到不同程度的砷污染。至今为止．已对印度各邦和孟加拧国的175000份和50808份压把井水样进行了含砷量检测。并组织了一支包括皮肤科、神经科和妇产科医生在内的有经验的专家组，对上述地区125000人进行了临床检查，其中9％患有砷导致的皮肤病损症状。至今共采集分析了60000份生物样品。包括发样、指甲、尿样及皮肤鳞屑，其中80％的样品含砷量超过允许值，很多人由此受到砷的亚临床损害。在上述砷暴露地区．19000名儿童经过检查，近1100人患有砷导致的皮肤病损。该调查结果表明．儿童比成人更容易受到砷的毒性损害。在这种状况下．应着力解决饮水安全问题来减轻砷的苊害．

关键词：砷饮水皮肤疾病神经毒性妊娠结局

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物料的加温与表面活性剂对磨矿效率的影响

河北冶金 1984年第4期 57-61页

作者： S.Narayanan N.Raghunathan U.b.nayak A.K.Lahiri 张学敏

表面活性剂在改善赤铁矿磨矿效率中的作用已进行了研究,研究中磨矿效率用破碎比度量。已发现,磨矿前的干燥可改善磨矿效率。加入表面活性剂对赤铁矿的硬度、显微硬度、破碎强度和湿磨效率的影响试验结果表明,分散剂比絮凝剂效果好,每种... 详细信息

表面活性剂在改善赤铁矿磨矿效率中的作用已进行了研究,研究中磨矿效率用破碎比度量。已发现,磨矿前的干燥可改善磨矿效率。加入表面活性剂对赤铁矿的硬度、显微硬度、破碎强度和湿磨效率的影响试验结果表明,分散剂比絮凝剂效果好,每种分散剂都具有使磨矿效率达最大值的监界浓度。

关键词：破碎比赤铁矿铁矿物磨矿效率水泥外加剂表面活性剂破碎强度物料

Synthesis and Characterization of bio-based Epoxy blends from Renewable Resource based Epoxidized Soybean Oil as Reactive Diluent

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Chinese Journal of Polymer Science 2015年第1期33卷 137-152页

作者： Sushanta K Sahoo Smita Mohanty Sanjay K nayak Laboratory for Advanced Research in Polymeric Materials (LARPM) Central Institute of Plastics Engineering & Technology (CIPET)B/25 CNI complex Patia Bhubaneswar 751024 Odisha India

A novel bioresin, epoxidized soybean oil was synthesized by in situ method and was characterized employing FTIR and NMR. The bioresin was blended with epoxy（DGEbA） at different ratios as reactive diluents for improved processibility and toughened nature. The composition with 20 wt% bioresin exhibited improved impact strength to the tune of 60% as compared to virgin epoxy. Fracture toughness parameters critical stress intensity factor（KIC） and critical strain energy release rate（GIC） were evaluated using single edge notch bending test and demonstrated superior enhancement in toughness. Dynamic mechanical, thermal, thermo mechanical and fracture morphological analyses have been studied for bio-based epoxy blends. Curing kinetics has been evaluated through DSC analysis to investigate the effect of bioresin on cross-linking reaction of neat epoxy with triethylenetetramine as curing agent.

关键词： bio-based epoxy Soybean oil Fracture toughness Curing kinetics TMA.

Least-Square Support Vector Machine and Wavelet Selection for Hearing Loss Identification

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Computer Modeling in Engineering & Sciences 2020年第10期125卷 299-313页

作者： Chaosheng Tang Deepak Ranjan nayak Shuihua Wang School of Computer Science and Technology Henan Polytechnic UniversityJiaozuo454000China Department of Computer Science and Engineering Malaviya National Institute of TechnologyJaipur302017India School of Mathematics and Actuarial Science University of LeicesterLeicesterLE17RHUK Department of Information Systems Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah21589Saudi Arabia

Hearing loss(HL)is a kind of common illness,which can significantly reduce the quality of *** example,HL often results in mishearing,misunderstanding,and communication ***,it is necessary to provide early diagnosis and timely treatment for *** study investigated the advantages and disadvantages of three classical machine learning methods:multilayer perceptron(MLP),support vector machine(SVM),and least-square support vector machine(LS-SVM)approach andmade a further optimization of the LS-SVM model via wavelet *** investigation illustrated that themultilayer perceptron is a shallowneural network,while the least square support vector machine uses hinge loss function and least-square ***,a wavelet selection method was proposed,and we found db4 can achieve the best *** experiments showed that the LS-SVM method can identify the hearing loss disease with an overall accuracy of three classes as 84.89±1.77,which is superior to SVM *** results show that the least-square support vector machine is effective in hearing loss identification.

关键词： Hearing loss wavelet entropy multilayer perceptron least square support vector machine

HERMAN RINGS WITH SMALL PERIODS AND OMITTED VALUES

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Acta Mathematica Scientia 2018年第6期38卷 1951-1965页

作者： Tarun Kumar CHAKRA Gorachand CHAKRAbORTY Tarakanta nayak School of basic Sciences Indian Institute of Technology Bhubaneswar Department of Mathematics Goverment General Degree College

All possible arrangements of cycles of three periodic as well as four periodicHerman rings of transcendental meromorphic functions having at least one omitted value aredetermined. It is shown that if p = 3 or 4, then the number of p-cycles of Herman rings isat most one. We have also proved a result about the non-existence of a 3-cycle and a 4-cycleof Herman rings simultaneously. Finally some examples of functions having no Herman ringare discussed.

关键词： omitted values Herman rings and transcendental meromorphic functions

Measurement of neutron capture cross section on^(71)Ga at 2.15 and 3.19 MeV and uncertainty propagation and covariance analysis

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Chinese Physics C 2023年第7期47卷 72-80页

作者： Rebecca Pachuau A.Gandhi Namrata Singh A.Kumar Mayur Mehta S.V.Suryanarayana L.S.Danu b.K.nayak b.Lalremruata Department of Physics Banaras Hindu UniversityVaranasi-221005India Institute for Plasma Research Gandhinagar-382428India Nuclear Physics Division Bhabha Atomic Research CentreMumbai-400085India Homi bhabha National Institute AnushaktinagarMumbai-400094India Department of Physics Mizoram UniversityTanhrilAizawl-796004India Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN-HH Bucharest077125Romania MCNS Manipal Academy of Higher EducationManipal 576104India

The cross section values of the^(71)Ga(n,γ)^(72)Ga reaction are measured,which are 9.14±0.81 mb and 5.74±0.50 mb at 2.15 and 3.19 MeV,*** detailed uncertainty propagation and covariance analysis are also ***^(7)Li(p,n)^(7)be reaction was used to generate the neutrons,and the neutron flux was normalized using the^(115)In(n,n′)^(115)In^(m)monitor *** measured cross section data are compared with the data available in the EXFOR database,the data obtained using nuclear reaction model codes EMPIRE-3.2 and TALYS-1.95,and also the evaluated nuclear data from ENDF/b-VIII.0 and JEFF-3.1/*** comparison shows that our result at 3.19 MeV is in good agreement with those of EMPIRE-3.2 and JEFF-3.1/*** there are no other measurements available at3.19 MeV,our data could not be compared with literature data at 3.19 MeV,but they are consistent with the cross section values available at 2.98±0.26 and 3.0±0.1 *** result at 2.15 MeV is slightly higher than the literature value available in EXFOR,evaluated value,and theoretically predicted result.

关键词： neutron capture cross section gallium uncertainty propagation and covariance analysis

Effect of Zn Concentration on Microstructural,Optical,and Hyperfine Properties of Nanocrystalline a-Fe_(2)O_(3)

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Acta Metallurgica Sinica(English Letters) 2014年第4期27卷 563-568页

作者： N.R.Panda D.Sahu b.S.Acharya P.nayak S.P.Pati D.Das School of basic Science Indian Institute of Technology BhubaneswarBhubaneswar 751013OdishaIndia School of Physics Sambalpur UniversitySambalpur 768019OdishaIndia School of Chemistry Sambalpur UniversitySambalpur 768019OdishaIndia C.V.Raman College of Engineering Bhubaneswar 752054OdishaIndia Department of Electronic Engineering Tohoku UniversitySendai 980-8579Japan UGC-DAE CSR Sector IIILB-8Bidhan NagarKolkata 700098India

Efforts have been made to prepare nanocomposites of a-Fe2O3-ZnO by wet chemical route with varying concentrations of the *** microstructural properties of the samples are investigated by powder X-ray diffractometry（PXRD） and Transmission electron *** concentration of Zn ions（up to 20 at%） leads to the formation of nanocomposites of a-Fe2O3 and *** of ZnFe2O4 phase is detected by the substitution of higher concentration of Zn2？（30 at%） in the *** average size of the nanoparticles remains in the range of 22–27 nm as obtained from XRD *** results obtained from electron microscopic studies are also close to these *** measurement shows the excitonic peak of ZnO around 390 nm which gets strengthened with Zn *** spectra show the metal–oxygen band below 700 *** temperature Mssbauer studies of the samples show the transition of iron oxide form antiferromagnetic state to paramagnetic state with increasing concentration of Zn2？.Sharp quenching of hyperfine field with Zn concentration is observed as the Hintvalue reduced to zero from 51 T.

关键词： Iron oxide ZnO Electron microscopy Mssbauer study

Assessment of ecosystem services of rice farms in eastern India

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Ecological Processes 2019年第1期8卷 435-450页

作者： A.K.nayak Md Shahid A.D.nayak b.Dhal K.C.Moharana b.Mondal R.Tripathi S.D.Mohapatra P.bhattacharyya N.N.Jambhulkar A.K.Shukla Nuala Fitton Pete Smith H.Pathak ICAR-National Rice Research Institute CuttackOdisha 753006India Indian Institute of Soil Sciences NabibaghBhopalMadhya PradeshIndia Institute of biological&Environmental Sciences University of Aberdeen23 St Machar DriveAberdeen AB243UUUK.

background:Rice is a major cereal crop and staple food of eastern India,and most farmers depend solely on rice for their *** farming provides both tangible and non-tangible benefits to ecosystems which need to be maintained and *** benefits are provided through ecosystem services(ES)that include both marketable and ***:In this study,the rice farms in eastern India were valued by quantifying the economic value of the services under conventional method of rice cultivation and the gap of ecosystem services value and farm income per unit area were assessed.A stratified random sampling technique was used in this study for selection of agro-climatic zones,districts,blocks,gram panchayat,and study units(households).Soil sampling was also performed for assessing the regulating services(biocontrol of pests,carbon flow,soil erosion,nitrogen fixation),provisioning services(food and by-products),and supporting services(soil fertility,hydrological flow,nutrient cycling,and soil formation).Results:The results indicated that the total economic value of ecosystem services ranged from US$1238 to 1688 ha−1 year−*** marketed(primary production)and non-marketed ecosystem services values ranged from 66–89 to 11–34%of the total,*** of some of the ecosystem services such as cultural services,biodiversity,and gas regulation,which may play a significant role in total ecosystem services,has not been made due to non-availability of data and appropriate methodology for rice *** values of parameters can explain the variability in ecosystem services among the agro-climatic zones in eastern *** of locations based on variability of ecosystem services helps in identifying intervention points for sustaining and improving ecosystem services,while permitting sustainable agro-ecological *** highest total economic gap between ES value and farm income was found in the north central plateau zone(US$

关键词： Ecosystem services Rice farming Economic gap Payment for ecosystem services(PES)