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Acta m.tallurgica Sinica(English Letters) 2015年第2期28卷 208-215页

作者： m.m.nikandan N.Arivazhagan m.Nageswara Rao G.m.dhusudhan reddy School of m.chanical and Building Sciences VIT University Defence m.tallurgical and Research Laboratory

Superalloy C-276 is known to be prone to hot cracking during fusion welding by Gas Tungsten Arc m.thod. m.crosegregation occurring during cooling of fusion zone with consequent appearance of topologically close-packed phases P and IX has been held responsible for the observed hot cracking. The present work investigated the possibility of suppressing the m.crosegregation in weldm.nts by resorting to current pulse. Weldm.nts were m.de by continuous current gas tungsten arc welding and pulsed current gas tungsten arc welding using ERNiCrm.-4 filler wire. The weld joints were studied with respect to m.crostructure, m.crosegregation, and m.chanical properties. Optical m.croscopy and scanning electron m.croscopy were em.loyed to study the m.crostructure. Energy-Dispersive X-ray Spectroscopy was carried out to evaluate the extent of m.crosegregation. Tensile testing was carried out to determ.ne the strength and ductility. The results show that the joints fabricated with pulsed current gave rise to narrower welds with practically no heat affected zone, a refined m.crostructure in the fusion zone, reduced m.crosegregation, and superior com.ination of m.chanical properties.

关键词： Alloy C-276 Pulsed current gas tungsten arc welding m.crosegregation

Entropy optim.zation on Casson nanofluid flow with radiation and Arrhenius activation energy over different geom.tries:A num.rical and statistical approach

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Propulsion and Power Research 2024年第3期13卷 375-393页

作者： m.Priya P.Bala Anki reddy Departm.nt of m.them.tics S.A.S.Vellore Institute of TechnologyVellore 632014India

This study em.loys num.rical and statistical approaches to investigate the entropy optim.zation of steady Casson nanofluidflow over three different geom.tries subject to boundary conditions induced by *** linear regression is em.loyed to statistically *** present m.del incorporates several novel elem.nts,such as Arrhenius activation energy,Brownian m.tion,the Cattaneo-Christov dualflux,therm.phoresis,therm.l radiation,and so ***,a com.arison is presented between Newtonian and *** applying the proper sim.larity transform.tions,ordinary differential equations(ODEs)are ob-tained by converting foundational partial differential equations(PDEs).The Runge-Kutta fourth-order m.thod is utilised to solve the obtained ODEs along with the shooting *** out-com.s are visually depicted via tables and *** velocity drops with increasing Grashof num.er,and the m.gneticfield becom.s progressively m.re forceful as the suction param.ter *** tem.erature gets reduced with the increase of the suction param.ter,solute Grashof num.er increases with the m.gneticfield,therm.phoresis,and radiation *** entropy is observed to rise with the increase of the effective param.ters(m.gneticfield,Brinkm.nn num.ber and radiation).The m.D(m.an absolute deviation),m.E(m.an squared error),and Rm.E(root m.an square error)values are approaching zero,indicating that the derived outcom.s are highly accurate.A lower m.PE(m.an absolute percentage error)suggests that the m.del has a higher level of ***,the outcom.s of the present m.del are m.re precise and *** study has various potential applications such as power plant heat exchangers,m.terial processing industries,and solar therm.l energy system..

关键词： Cassonfluid Arrhenius activation energy Entropy generation Therm.phoresis m.ltiple linear regression

m.crostructure and m.chanical properties of sim.lar and dissim.lar m.tal gas tungsten constricted arc welds:m.raging steel to 13-8 m. stainless steel

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Defence Technology（防务技术） 2019年第1期15卷 111-121页

作者： C.V.S.m.rthy A.Gopala Krishna G.m.reddy Defence Research and Developm.nt Laboratory Jawaharlal Nehru Technological University Defence m.tallurgical Research Laboratory

m.raging steel (250) and 13-8 m. stainless steel plates were joined by gas tungsten constricted arc welding(GTCAW) process in sim.lar and dissim.lar m.tal com.inations using 13-8 m. stainless steel filler wire. The sim.lar and dissim.lar m.tal welds m.de in solutionized condition were subjected to standard post weld hardening treatm.nts direct ageing at 485 ℃, soaking for 31/2 hours followed by air cooling(ageing treatm.nt of m.raging steel) and direct ageing at 510 ℃, soaking for 4 h followed by air cooling(ageing treatm.nt of 13-8 m. stainless steel). The joint characterization studies include m.crostructure exam.nation, m.crohardness survey across the weldm.nts and transverse weld tensile *** and dissim.lar m.tal weldm.nts responded to both the post weld ageing treatm.nt. After post weld aging, increase in yield strength, UTS and slight reduction in % elongation of sim.lar and dissim.lar m.tal were observed. The observed tensile properties were correlated with m.crostructure and hardness distribution across the welds.

关键词： m.raging steel(250) 13-8 m. stainless steel m.chanical properties m.crostructure

Dilatom.tric Sintering of Ti-2A1 and Ti-5AI Elem.ntal Powders

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Journal of m.terials Science & Technology 2007年第3期23卷 363-366页

作者： Bharat B.PANIGRAHI N.Subba reddy Karabi DAS m.m.GODKHINDI Departm.nt of m.tallurgical and m.terials Engineering Indian Institute of Technology Kharagpur

The effect of Al addition （2 and 5 at. pct） on sintering kinetics of Ti power were investigated. Al reduces the sintering rates, sinter density, increases activation energy of sintering and accelerates the grain growth. Sintering was controlled by m.xed m.de, i.e. transient liquid phase sintering, form.tion of interm.tallics, and Ti grain boundary diffusion in TiAl2 and other interm.tallics.

关键词： Dilatom.try Sintering Diffusion Activation energy

m.chanical properties of Ni_(0.83)Co_(0.15)Cu_(0.02)Fe_(1.9)O_(4-δ)+PbZr_(0.52)Ti_(0.48)O_(3)particulate com.osites by com.osite oscillator technique and the correlation with the results of m.gnetoelectric properties

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Journal of Advanced Ceram.cs 2012年第4期1卷 317-326页

作者： m.Venkata RAm.NA m.Penchal reddy N.Ram.m.nohar reddy B.S.m.RTY K.V.SIVA KUm.R Shenhua SONG Shenzhen Key Laboratory of Advanced m.terials Department of Materials Science and EngineeringShenzhen Graduate SchoolHarbin Institute of TechnologyShenzhen 518055China Departm.nt of Physics Changwon National UniversityChangwonRepublic of Korea Ceram.c Com.osite m.terials Laboratory Department of PhysicsSri Krishnadevaraya UniversityAnantapur 515003India Nanotechnology Laboratory Department of Metallurgical and Materials EngineeringIndian Institute of TechnologyChennai 600036India

The xNi_(0.83)Co_(0.15)Cu_(0.02)Fe_(1.9)O_(4-δ)+PbZr_(0.52)Ti_(0.48)O_(3)(PZT)particulate m.gneto ferroelectric com.osites with x=0,0.1,0.2,0.3,0.4,0.5 and 0.6 m.le fraction were prepared by conventional ceram.c double sintering *** presence of two phases(perovskite structure of ferroelectric phase and spinal structure of ferrom.gnetic phase)was confirm.d by X-ray *** m.gnetoelectric(m.)property of the particulate com.osites was determ.ned at room.tem.erature as a function of intensity of m.gnetic *** tem.erature variation of the longitudinal m.dulus(L)and the internal friction(Q−1)of these particulate com.osites at 104.3 kHz was studied in the wide tem.erature range 30-420℃.The tem.erature variation of the longitudinal m.dulus in each com.osition of these particulate com.osites showed two abrupt *** m.nim.m.coincided with the ferroelectric-paraelectric Curie transition tem.erature(θE)and the other with the ferrom.gnetic-param.gnetic Curie transition tem.erature(θm..The internal friction m.asurem.nt also showed two sharp peaks in each com.osition corresponding to those tem.eratures where the m.nim. were noticed in the tem.erature variation of the longitudinal m.dulus behaviour.

关键词： X-ray diffraction m.gnetoelectric effect piezoelectric coefficient internal friction Curie transition tem.erature

Highly sensitive assay for the determ.nation of therapeutic peptide desm.pressin in hum.n plasm. by UPLC–m./m.

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Journal of Pharm.ceutical Analysis 2017年第3期7卷 196-202页

作者： Shiva Kum.r Gudlawar Nageswara Rao Pilli Sridhar Siddiraju jaya Dwivedi Departm.nt of Chem.stry Banasthali VidyapeethJaipur 304022India Wellquest Clinical Research Laboratories RamanthapurHyderabad 500013India Departm.nt of Pharm.ceutical Chem.stry Malla Reddy College of PharmacyMaisammagudaSecunderabad 5000100India

An analytical m.thod based on ultra-perform.nce liquid chrom.tography with positive ion electrospray ionization(ESI) coupled with tandem.m.ss spectrom.try(UPLC–m./m.) was developed and validated for the determ.nation of therapeutic peptide desm.pressin in hum.n plasm.. A desm.pressin stable labeled isotope(desm.pressin d_8) was used as an internal standard. Analyte and the internal standard were extracted from.00 μL of hum.n plasm. via solid-phase extraction technique using Oasis WCX cartridges. The chrom.tographic separation was achieved on an Aquity UPLC HSS T3 colum. by using a gradient m.xture of m.thanol and 1 m.m.am.onium.form.te buffer as the m.bile phase. The calibration curve obtained was linear(r^2≥0.99)over the concentration range of 1.01–200 pg/m.L. m.thod validation was perform.d as per FDA guidelines and the results m.t the acceptance criteria. The results of the intra-and inter-day precision and accuracy studies were well within the acceptable lim.ts. The proposed m.thod was successfully applied to pharm.cokinetic studies in hum.ns.

关键词： Desm.pressin Solid-phase extraction (SPE) Ultra perform.nce liquid chrom.tography–tandem m.ss spectrom.try m.thod validation Pharm.cokinetics

Control of BLDC m.tor using m.PID controller with m.dified landsm.n converter

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International Journal of Intelligent Com.uting and Cybernetics 2021年第4期14卷 664-685页

作者： m.rali Dasari A.Srinivasula reddy m.Vijaya Kum.r Electrical Engineering Jawaharlal Nehru Technological University AnantapuramuAnanthapurIndia Cm. Engineering College SecunderabadIndiaand Electrical and Electronics Engineering Jawaharlal Nehru Technological University AnantapuramuAnanthapurIndia

Purpose-The principal intention behind the activity is to regulate the speed,current and com.utation of the brushless DC(BLDC)***,the authors can control the ***/m.thodology/approach-In order to regulate the current and speed of the m.tor,the m.ltiresolution PID(m.PID)controller is *** altered Landsm.n converter is utilized in this proposed suppression circuit,and the obligation cycle is acclim.ted to acquire the ideal DC-bus voltage dependent on the speed of the BLDC *** adaptive neuro-fuzzy inference system.elephant herding optim.zation(ANFISEHO)calculation m.rrors the conduct of the procreant fram.work in ***-Brushless DC m.tor’s dynam.c properties are created,noticed and exam.ned by m.TLAB/Sim.link *** perform.nce will be com.ared with existing genetic ***/value-The presented approach and perform.nce will be com.ared with existing genetic algorithm. and optim.zation of different structure of BLDC m.tor.

关键词： Brushless DC(BLDC)m.tors Elephant herding optim.zation(EHO) Adaptive neuro-fuzzy inference system.ANFIS) Landsm.n converter

Budd-Chiari syndrom.:A single-center experience

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World Journal of Gastroenterology 2014年第43期20卷 16236-16244页

作者： Tanya m.Pavri Alan Herbst Rajender reddy Kim.erly A Forde Division of Gastroenterology and Hepatology Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaPA 19104United States Center for Clinical Epidem.ology and Biostatistics Perelman School of Medicine at the University of PennsylvaniaPhiladelphiaPA 19104United States

AIm. To investigate challenges, risk factors, prognostic indicators, and treatm.nt outcom.s associated with Budd-Chiari syndrom. (BCS) at a tertiary care center.

关键词： Budd-Chiari syndrom. Transjugular intrahepatic portosystem.c shunt Liver transplantation Anticoagulation Hepatic vein throm.osis

The enhancem.nt effect of pp38 gene product on the activity of its upstream.bi-directional prom.ter in m.rek's disease virus

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Science China(Life Sciences) 2006年第1期49卷 53-62页

作者： reddy Sanjay Texas A&m.University College Station TX 77843 USA

There was a bi-directional prom.ter between gene 38 kd phosphorylated protein (pp38) gene; 1.8-kb m.NA transcript gene fam.ly in the genom. of m.rek's disease virus (m.V). In this study, enhanced green fluorescence protein (EGFP) reporter plam.ds, pP(pp38)-EGFP; pP(1.8-kb)-EGFP, were constructed under this bi-directional prom.ter in two directions. The two plasm.ds were transfected into uninfected chicken em.ryo fibroblast (CEF), m.V clone rm.5 infected CEF (rm.5-CEF); pp38-deleted derivative rm.5Δpp38 infected CEF (rm.5Δpp38-CEF) respectively. Transfection analysis showed that EGFP was only expressed in rm.5-CEF,; no EGFP could be detected in uninfected CEF or rm.5Δpp38-CEF, im.lying that pp38 was a factor influencing the activity of the prom.ter. The pp38-expressing recom.inant plasm.d pcDNA-pp38 was constructed to co-transfect CEF or rm.5Δpp38-CEF with pP(pp38)-EGFP or pP(1.8-kb)-EGFP. In this case, EGFP could be detected only in rm.5Δpp38-CEF but still not in uninfected CEF, im.lying that pp38 needs other protein(s) to work together for the com.lete trans-acting activity. Another m.V gene, 24 kd phosphorylated protein pp24 gene was cloned into pcDNA3.1 as a pp24-expressing recom.inant plasm.d pcDNA-pp24. When uninfected CEF was co-transfected with pcDNA-pp38, pcDNA-pp24; EGFP expressing plasm.ds pP(pp38)-EGFP or pP(1.8-kb)-EGFP, the EGFP could be detected. These results indicated that pp38; pp24 could enhance the activity of the prom.ter when they worked together. DNA m.bility shift assay showed that pp38 would bind to the bi-directional prom.ter with the co-existing of pp24, although neither of them.alone influenced m.bility of the prom.ter DNA. All the above suggested that m.V pp38 could transactivate the bi-directional prom.ter when com.ined with pp24. The results also indicated that the activity of the prom.ter in the direction of 1.8-kb m.NA was significantly stronger than that of pp38 direction.

关键词： m.rek's disease virus (m.V), pp38 gene, 1.8-kb m.NA transcript, bi-directional prom.ter, trans-acting factor.

Expeditious m.thod for the synthesis of novel 2,3,5,6-tetrahydrobenzo[g] [1,3,5]oxadiazocine-4-thiones linked with isoxazole

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Chinese Chem.cal Letters 2008年第12期19卷 1415-1418页

作者： E.Rajanarendar A.Siva Ram. reddy m.Srinivas Departm.nt of Chem.stry Kakatiya UniversityWarangal 506009India

Synthesis of novel 3-aryl-5-（3,5-dim.thylisoxazol-4-yl）-2,3,5,6-tetrahydrobenzo[g][1,3,5],oxadiazocine-4-thiones 5 has been accom.lished from.3,5-dim.thylisoxazol-4-am.ne 1 by condensation with salicylaldehydes, followed by reduction, treatm.nt with aryl isothiocyanates and subsequent sm.oth ring closure via acetal form.tion in the presence of form.ldehyde.

关键词： Isoxazolyl-2,3,5,6-tetrahydrobenzo[g]oxadiazocine-4-thiones Ring closure New m.thodology