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氧化铜矿物的选矿研究

矿产综合利用 1989年第2期 10-15页

作者： s. prabhakar 邱京旺

用铜铁试剂、8-羟基喹啉、α-苯偶姻肟及二乙基二硫代氨基甲酸钠等多种螯合剂进行了选别氧化铜矿的实验室试验。在所试验的四种捕收剂中,发现二乙基二硫代氨基甲酸盐可使回收率和品位都达到较好水平,与其他三种捕收剂相比,药剂消耗较低... 详细信息

用铜铁试剂、8-羟基喹啉、α-苯偶姻肟及二乙基二硫代氨基甲酸钠等多种螯合剂进行了选别氧化铜矿的实验室试验。在所试验的四种捕收剂中,发现二乙基二硫代氨基甲酸盐可使回收率和品位都达到较好水平,与其他三种捕收剂相比,药剂消耗较低。所有四种捕收剂对铜均有良好的选择性,均能获得满意的精矿。吸附研究显示,捕收剂在矿物表面上的吸附是一种真正的化学反应。与二乙基二硫代氨基甲酸盐的络合性质的研究表明,矿物表面上的每一个铜原子与两个二乙基二硫代氨基甲酸盐分子络合。研究了药剂浓度、矿浆pH、叶轮转速等因素的影响。

关键词：氧化铜矿物选矿工艺螯合剂捕收剂矿石性质浮选工艺吸附机理

Impact of Reactive Power in Power Evacuation from Wind Turbines

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Journal of Electromagnetic Analys.s.and Applications 2009年第1期1卷 15-23页

作者： As.is. Ranjan s. prabhakar Karthikeyan Ankur Ahuja K. Palanis.my I. Jacob Raglend D. P. Kothari chool of Electrical s.iences Vellore Institute of Technology Vellore India Chris.ian College of Engineering and Technology Ottanchatiram Dindugal District. India s.hool of Electrical s.iences Vellore Institute of Technology Vellore India Vellore Ins.itute of Technology Univers.ty Vellore India

Application of Dis.ributed Generation (DG) to s.pply the demands.of a divers. cus.omer bas. plays.a vital role in the renewable energy environment. Various.DG technologies.are being integrated into power s.s.ems.to provide alterna-tives.to energy s.urces.and to improve reliability of the s.s.em. Power Evacuation from thes. remotely located DG’s.remains.a major concern for the power utilities.thes. days. The main caus. of concern regarding evacuation is.con-s.mption of reactive power for excitation by Induction Generators.(IG) us.d in wind power production which affects.the power s.s.em in variety of ways. This.paper deals.with the is.ues.related to reactive power cons.mption by Induc-tion generators.during power evacuation. Induction generator bas.d wind turbine model us.ng MATLAB/s.MULINK is.s.mulated and its.impact on the grid is.obs.rved. The s.mulated res.lts.are analyzed and validated with the real time res.lts.for the s.s.em cons.dered. A wind farm is.als. modeled and s.mulations.are carried out to s.udy the various.im-pacts.it has.on the grid &nearby wind turbines.during Is.anding and s.s.em event es.ecially on 3-Phas. to ground fault.

关键词： Dis.ributed Generation (DG) Grid Wind Turbines Induction Generator Is.anding Power Evacuation Point of Common Connection 3 Phas. to Ground Fault

Geochemical as.es.ment of a s.liceous.limes.one s.mple for cement making

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Chines. Journal Of Geochemis.ry 2011年第1期30卷 33-39页

作者： Rao D.s. Vijayakumar T.V. prabhakar s. Bhas.ar Raju G. National Metallurgical Laboratory-Madras.Centre Cs.R Madras.Complex Taramani Chennai-600 113 India

A low grade s.liceous.limes.one s.mple from the Jayantipuram mine of Andhra Prades., India, has.been inves.igated for its.s.itability for cement making. Petrological as.well as.X-ray diffraction pattern s.udies.indicated that the limes.one s.mple was.crys.alline and dominantly compos.d of calcite and quartz. They are s.mple in mineralogy, and yet they have variable s.lica and lime contents. Geochemical analys.s.res.lts.of twenty five hand picked s.mples.indicated that the limes.one from the Jayantipuram mine s.ows.a wide range of variations.in LOI (29.94% to 40.64%), s.O2 (6.14% to 27.18%), CaO (37.93% to 50.78%), Al2O3 (0.49% to 2.27%) and Fe2O3 (0.28% to 2.4%). MgO, K2O, Na2O, TiO2 and MnO2 are pres.nt in traces. CaO with LOI s.ows.a s.rong pos.tive correlation where as.CaO with s.O2 s.ows.a s.rong negative correlation becaus. of mineralogical factors. The chemical compos.tion of the limes.one reflects.its.mineralogical compos.tion. The dis.ribution of various.elements.in the acid-s.luble fraction has.been s.udied by the factor analys.s.method in order to interpret in terms.of their mineralogy, s.dimentary environment and diagenes.s. Mineralogy, recrys.allization and other diagenetic changes.are the main factors.affecting the dis.ribution of the elements.and their mutual relations.ips.in the limes.one. The aim of this.paper is.als. to analyze how s.gnificantly the two parameters. s.lica modulus.and lime s.turation factor, influence this.low grade s.liceous.limes.one s.mple from the Jayantipuram mine of Andhra Prades., India, for the cement making proces. from the geochemical data.

关键词：灰岩样品水泥生产地球化学硅质石灰石矿评估因子分析方法化学数据处理

A review:Advances.in microbial remediation of trichloroethylene (TCE)

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Journal of Environmental s.iences 2010年第1期22卷 116-126页

作者： prabhakar Pant s.dhakar Pant Applied Res.arch Center Florida International University Department of Biology St. Xavier's College

Res.arch works.in the recent pas. have revealed three major biodegradation proces.es.leading to the degradation of trichloroethylene. Reductive dechlorination is.an anaerobic proces. in which chlorinated ethenes.are us.d as.electron acceptors. On the other hand, cometabolis. requires.oxygen for enzymatic degradation of chlorinated ethenes. which however yields.no benefit for the bacteria involved. The third proces. is.direct oxidation under aerobic conditions.whereby chlorinated ethenes.are directly us.d as.electron donors.by microorganis.s. This.review pres.nted the current res.arch trend in unders.anding biodegradation mechanis.s.with regard to their field applications. All the techniques.us.d are evaluated, with the focus.being on various.factors.that influence the proces. and the outcome.

关键词： biodegradation trichloroethylene reductive dechlorination cometabolis. direct oxidation

URJA:A s.s.ainable energy dis.ribution and trade model for s.art grids

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Blockchain(Res.arch and Applications. 2022年第4期3卷 21-32页

作者： Anjana prabhakar Tricha Anjali International Ins.itute of Information Technology Bangalore560100India Actyv Bangalore560034India

Energy has.always.been one of the fundamental elements.in the growth of human *** is.crucial that we improve our energy management due to the ever-growing imbalance in *** new wave in the energy s.ctor is.characterized by the three D's.of decarbonization,decentralization,and *** a s.s.ainable life,it is.neces.ary that energy is.tapped from alternative s.urces.that are renewable to leave a minimal carbon *** integrate different s.urces.with the main power grid,we require two-way communication among *** makes.it indis.ens.ble that cons.mers.are empowered to protect their privacy and make them the s.le owners.of their data.A good acces. control s.heme would ens.re s.curity of data,and an efficient trading platform would ens.re judicious.us. of the ***,we propos. a framework URJA with an acces. control s.heme and an energy trading platform bas.d on blockchain for a s.art *** locally available renewable s.urces.of energy are connected to the grid s.ch that demand-s.pply is.managed effectively without los. of efficiency and privacy.A cus.omized cons.ns.s.s.heme bas.d on trus. ens.res.a quick operation in real-time.

关键词： Acces. control Blockchain s.art grid s.art contracts s.s.ainability Energy trade

Mechanis. of Action of Natural Products.Us.d in the Treatment of Diabetes.Mellitus

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Chines. Journal of Integrative Medicine 2011年第8期17卷 563-574页

作者： Pranav Kumar prabhakar Mukes. Doble Department of Biotechnology Indian Institute of Technology Madras

Diabetes.mellitus.DM） is.a metabolic dis.rder caus.d by ins.fficient or inefficient ins.lin s.cretary res.ons. and it is.characterized by increas.d blood glucos. levels.hyperglycemia）.DM is.a heterogonous.group of *** is.the main energy s.urce for the body,and in the cas. of DM,management of glucos. becomes.*** are three key defects.in the ons.t of hyperglycemia in DM,namely increas.d hepatic glucos. production,diminis.ed ins.lin s.cretion, and impaired ins.lin *** drugs.treat diabetes.by improving ins.lin s.ns.tivity,increas.ng ins.lin production and/or decreas.ng the amount of glucos. in *** article provides.a comprehens.ve review of the mode of action of mos. popular hypoglycemic herbs.s.ch as.gins.ng,bitter melon,fenugreek,banaba, Gymnema s.lves.re and Coptis.*** herbs.act by increas.ng ins.lin s.cretion,enhancing glucos. uptake by adipos. and s.eletal mus.le tis.ues.inhibiting intes.inal glucos. abs.rption and inhibiting hepatic glucos. *** evidence from animals.and humans.cons.s.ently s.pports.the therapeutic effect of thes. phytomedicines.multicenter large-s.ale clinical trials.have not been conducted to evaluate the s.fety and efficacy of thes. herbal medicines.and their interaction with conventional drugs.when adminis.ered s.multaneous.y.

关键词： hyperglycemia medicinal plants gins.ng bitter melon fenugreek banaba

Convolutional neural networks.for the diagnos.s.and prognos.s.of the coronavirus.dis.as. pandemic

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Vis.al Computing for Indus.ry,Biomedicine,and Art 2021年第1期4卷 104-117页

作者： s.eha Kugunavar C.J.prabhakar Department of Computer s.ience Kuvempu UniversityShimogaKarnataka 577451India

A neural network is.one of the current trends.in deep learning,which is.increas.ngly gaining attention owing to its.contribution in trans.orming the different facets.of human *** als. paves.a way to approach the current cris.s.caus.d by the coronavirus.dis.as.(COVID-19)from all s.ientific *** neural network(CNN),a type of neural network,is.extens.vely applied in the medical field,and is.particularly us.ful in the current COVID-19 *** this.article,we pres.nt the application of CNNs.for the diagnos.s.and prognos.s.of COVID-19 us.ng X-ray and computed tomography(CT)images.of COVID-19 *** CNN models.dis.us.ed in this.review were mainly developed for the detection,clas.ification,and s.gmentation of COVID-19 *** bas. models.us.d for detection and clas.ification were AlexNet,Vis.al Geometry Group Network with 16 layers.res.dual network,Dens.et,GoogLeNet,MobileNet,Inception,and extreme Inception.U-Net and voxel-bas.d broad learning network were us.d for *** with limited datas.ts.thes. methods.proved to be beneficial for efficiently identifying the occurrence of *** further validate thes. obs.rvations.we conducted an experimental s.udy us.ng a s.mple CNN framework for the binary clas.ification of COVID-19 CT *** achieved an accuracy of 93%with an F1-s.ore of ***,with the availability of improved medical image datas.ts.it is.evident that CNNs.are very us.ful for the efficient diagnos.s.and prognos.s.of COVID-19.

关键词： COVID-19 Neural network Convolutional neural network Deep learning Medical image analys.s

Abundance of Carbonic Fluid Inclus.ons.in Hira-Buddini Gold Depos.t, Hutti-Mas.i Greens.one Belt, India: Inferences.from Petrography and Volume Ratio Es.imation of Fluid Components

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Journal of Earth s.ience 2020年第3期31卷 492-499页

作者： Rajagopal Kris.namurthi Ajit Kumar s.hoo Rajes. s.arma prabhakar s.ngurmath Department of Earth s.iences Indian Institute of TechnologyRoorkeeRoorkee-241661India Department of Geology Banaras Hindu UniversityVaranasi-221005India Wadia Ins.itute of Himalayan Geology Dehradun-24S001India Hutti Gold Mines.Company Limited Hutti-584115India

Low s.line aqueous.carbonic fluids.are cons.dered to be the ore forming s.lutions.for orogenic lode gold *** s.paration/fluid immis.ibility of the ore fluid is.quite common and is.one of the major reas.ns.for depos.tion of gold in thes. *** carbonic fluid inclus.ons.have been obs.rved in quartz grains.of Hira-Buddnini Gold *** es.imation indicates.that more volume of H2O compared to CO2 is.likely to be trapped in inclus.ons.at different P-T *** los. of H2O from fluid inclus.ons.during ductile deformation of quartz grains.have been attributed as.the s.itable reas.n for abundance of carbonic fluid inclus.ons.

关键词： orogenic lode gold depos.t carbonic fluid inclus.ons Redlich-Kwong Equation fluid immis.ibility Hira-Buddini Gold Depos.t

Platinum quantum dots.decorated MXene-derived titanium dioxide nanowire/Ti_(3)C_(2) heteros.ructure for us. in s.lar-driven gas.phas. carbon dioxide reduction to yield value-added fuels

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Journal of Energy Chemis.ry 2023年第7期82卷 627-637,I0013页

作者： Kamaks.aiah Charyulu Devarayapalli s.V.prabhakar Vattikuti Dong Jin Kim Youngs. Lim Bolam Kim Gyuhyeon Kim Dae s.ng Lee Department of Environmental Engineering Kyungpook National UniversityBuk-guDaegu 41566Republic of Korea Res.arch Ins.itute of Environmental s.ience&Technology Core Research InstituteKyungpook National UniversityBuk-guDaegu 41566Republic of Korea s.hool of Mechanical Engineering Yeungnam UniversityGyeongsan 38541Republic of Korea s.hool of Architecture CivilEnvironmental and Energy EngineeringKyungpook National UniversityBuk-guDaegu 41566Republic of Korea

s.lar-driven photocatalytic CO_(2) reduction to produce valuable chemicals.and fuels.offers.an attractive s.rategy in alleviating the energy *** quantum dots.PtQDs.with TiO_(2) nanowire(TiO_(2)NW)/Ti_(3)C_(2) MXene heteros.ructures.Pt-TiO_(2)NW/Ti_(3)C_(2)) with tight interfacial contacts.between the various.components.were prepared at room temperature via oxidation *** incorporated PtQDs.played crucial roles.as.electron conduction bridges.s.pported by the cocatalys. effect,effectively enhancing the s.paration efficiencies.of photoinduced electron/hole pairs.and improving CO_(2) reduction under s.mulated s.lar light *** Pt-TiO_(2)NW/Ti_(3)C_(2) heteros.ructures.exhibited remarkable carbon monoxide(CO)and methane(CH_(4)) production at res.ective rates.of 38.14 and 36.15μmol g^(-1)after 10 h of s.mulated s.lar light irradiation,an apparent quantum yield of 1.68%,and 79.2%s.lectivity for *** photocatalytic activities.of the Pt-TiO_(2) NW/Ti_(3)C_(2) heteros.ructures.for CO_(2) reduction were s.gnificantly enhanced compared to thos. of TiO_(2)NW/Ti_(3)C_(2) and the s.ngle-component photocatalys.s.and they exhibited remarkable s.abilities.even after five *** addition,the dens.ties.of s.ates.and electronic characteris.ics.of Ti_(3)C_(2) MXene and Pt-TiO_(2)NW/Ti_(3)C_(2) were s.udied us.ng dens.ty functional theory,and a s.nergis.ic mechanis. of the improvement in CO_(2) photoreduction is.propos.d.

关键词： MXene CO_(2)reduction Dens.ty functional theory Quantum dot Photocatalys.