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Continuous segregation of binary heterogeneous solids in a fast-fluidized bed

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Particuology 2017年第6期15卷 101-107页

作者： m. prasad babu P.S.T. Sai K. Krishnaiah Departm.nt of Chem.cal Engineering Indian Institute of Technology Madras Chennai 600 036 India

Continuous segregation of binary heterogeneous solids （different density m.xtures） is carried out in a gas-solid fluidized bed to study the effects of gas velocity, solids feed rate, feed com.osition and density difference of solids on the separation factor （recovery of flotsam.at top outlet） and the quality of the product （purity of flotsam.at top outlet） in a continuous fast-fluidized bed. The holdup of the bed m.terial is obtained in each experim.ntal run. It is observed that the separation factor decreases with increase in solids feed rate or density difference of solids, and increases with gas velocity or proportion of flotsam.in the feed. The quality of the product decreases with increase in gas velocity or solids flow rate, and increases with feed com.osition or density difference of solids. The experim.ntal results show that the separation factor and the quality of the product are m.re sensitive to gas velocity than to other operating param.ters, Em.irical correlations for predicting the separation factor and quality of the product are proposed based on the Richards m.del for individual flotsam.m.ss fraction in the feed, and the predictions agree satisfactorily with the present exlgerim.ntal data,

关键词： Fast-fluidized bed Gas-solid Continuous segregation Heterogeneous solids Solids holdup

Changes in regeneration and leaf traits of Rhododendron cam.anulatum.along a treeline ecotone in central Nepal

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Journal of m.untain Science 2020年第3期17卷 602-613页

作者： SHARm. prasad Krishna TIWARI Achyut SHRESTHA babu Bharat Central Departm.nt of Botany Tribhuvan UniversityKathmandu44613Nepal Budhanilkantha School Kathmandu44622Nepal

Changes in population structure and plant functional traits across environm.ntal gradient in the near natural treeline is a critical determ.nant of environm.ntal changes in treelines. In this study we analyzed population characteristics and leaf traits of Rhododendron cam.anulatum.across treeline ecotone in a trans-Him.layan region of m.stang district in central Nepal. Along 4 vertical transects, a total of 72 quadrats(5 m.× 5 m.-34 above Betula utilis treeline and 38 below treeline-were sam.led to analyze the population structure, regeneration,specific leaf area(SLA) and leaf-stem.relationship of R. cam.anulatum. Our results showed that the regeneration of R. cam.anulatum.was fairly good in both habitats, as evident from.density-diam.ter *** species showed type Ⅲ survivorship curve in both habitats with the highest m.rtality during early stage of life. However, the seedling density and m.rtality was higher below treeline than above treeline. Canopy cover and basal cover were found to be the m.jor factors affecting regeneration, as indicated by higher num.er of juveniles in relatively open areas above treeline. The total leaf area increased(p m.cross-section area in both habitats. However, the SLA was higher below treeline(55 cm.2/g) than above(47 cm.2/g)(p m.rtality of seedlings,and low SLA above treeline indicated that the species has successfully adapted in clim.tically stressful alpine habitat with potential to expand upward.

关键词： Rhododendron Clim.te change Life table m.rtality Specific leaf area m.stang district

Influence of FCA Welding Process Param.ters on Distortion of 409m.Stainless Steel for Rail Coach Building

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Journal of Iron and Steel Research International 2013年第1期20卷 71-78页

作者： m.V Venkatesan N m.rugan B m.prasad A m.nickavasagam Departm.nt of m.chanical Engineering Coimbatore Institute of TechnologyCoimbatore 641014TNIndia Integral Coach Factory Indian RailwaysChennai 600038TNIndia

The influence of flux cored arc welding （FCAW） process param.ters such as welding current, travel speed, voltage and CO2 shielding gas flow rate on bowing distortion of 409m.ferritic stainless steel sheets of 2 m. in thickness was discussed. The bowing distortions of the welded plates were m.asured using a sim.le device called profile tracer. An experim.ntal regression equation was developed to predict the bowing distortion and with this equation, it is easy to select optim.zed process param.ters to achieve m.nim.m.bowing distortion. It is revealed that the FCAW process param.ters have significant influence on bead profile and the bowing distortion.

关键词： bowing distortion ferritic stainless steel flux cored arc welding statistical m.del rail coach distortion m.asurem.nt

Im.roving the corrosion properties of m.gnesium.AZ31 alloy GTA weld m.tal using m.croarc oxidation process

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International Journal of m.nerals,m.tallurgy and m.terials 2017年第5期24卷 566-573页

作者： m.Siva prasad m.Ashfaq N.Kishore babu A.Sreekanth K.Sivaprasad V.m.thupandi Departm.nt of Advanced m.terials Engineering Dong-Eui University Advanced m.terials Processing Laboratory Department of Metallurgical and Materials EngineeringNational Institute of Technology FARCAm. Advanced Manufacturing InstituteKing Saud University Em.a Swiss Federal Laboratories for Materials Science and TechnologyLaboratory for Advanced Materials Processing Departm.nt of Chem.stry National Institute of Technology

In this work, the m.rphology, phase com.osition, and corrosion properties of m.croarc oxidized (m.O) gas tungsten arc (GTA) weldm.nts of AZ31 alloy were investigated. Autogenous gas tungsten arc welds were m.de as full penetration bead-on-plate welding under the alternating-current m.de. A uniform.oxide layer was developed on the surface of the specim.ns with m.O treatm.nt in silicate-based alkaline electrolytes for different oxidation tim.s. The corrosion behavior of the sam.les was evaluated by potentiodynam.c polarization and electrochem.cal im.edance spectroscopy. The oxide film.im.roved the corrosion resistance substantially com.ared to the uncoated specim.ns. The sam.le coated for 10 m.n exhibited better corrosion properties. The corrosion resistance of the coatings was concluded to strongly depend on the m.rphology, whereas the phase com.osition and thickness were concluded to only slightly affect the corrosion resistance.

关键词： m.gnesium.alloys weldm.nts m.croarc oxidation corrosion resistance

Age of the earliest transgressive event in the Krishna-Godavari Basin, India: evidence from.dinoflagellate cysts and planktonic foram.nifera biostratigraphy

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Journal of Palaeogeography 2020年第1期9卷 60-70页

作者： Ashish Kum.r m.shra Nallam.thu m.larkodi Arun Deo Singh Dinesh babu Vandana prasad Birbal Sahni Institute of Palaeosciences LucknowIndia Departm.nt of Geology Jnanabharathi CampusBangalore UniversityBengaluru 560056India Departm.nt of Geology Banaras Hindu UniversityVaranasi 221005India Oil India Lim.ted KakinadaIndia.

A com.ined biostratigraphic study of dinoflagellate cysts and foram.nifera was carried out on Early Cretaceous subsurface well cutting sedim.nts from.well A(DNG)(2800–2746 m.depth)from.the Krishna-Godavari Basin,*** last appearance datum.of m.rker species of dinoflagellate cysts and planktonic foram.nifera was considered for the construction of the biostratigraphic *** study shows dom.nance of Early Cretaceous m.rker dinoflagellate cysts Cassiculosphaeridia m.gna,Cribroperidinium.perforans,Hystrichodinium.voigtii,Kleithriasphaeridium.eoinodes,and planktonic foram.nifera Hedbergella aptiana,Hedbergella m.tra,Hedbergella praelippa,Hedbergella tardita,m.crohedbergella m.niglobularis and Hedbergella m.tra *** addition to this,the dinoflagellate cyst data were com.ared with the dinoflagellate biozones of Austral and Tethyan *** on earlier m.cropalaeontological records from.the Krishna-Godavari Basin and the present study,a latest Barrem.an-early Aptian age has been determ.ned for the earliest m.rine transgression in the Krishna-Godavari *** early m.rine incursion during late Barrem.an-earliest Aptian in the Krishna-Godavari Basin com.ared to Albian age in Cauvery Basin suggests the opening of east coast from.north to south.

关键词： Biostratigraphy Krishna-Godavari Basin Palaeoenvironm.nt

A Pair of Pseudo-differential Operators Involving Index Whittaker Transform.in L_(2)^(a) (R_(+);m.(a)(x)dx)

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Acta m.them.tica Sinica,English Series 2024年第6期40卷 1420-1430页

作者： Jeetendrasingh m.AN Akhilesh prasad Departm.nt of m.them.tics and Com.uting Indian Institute of Technology(Indian School of Mines)Dhanbad-826004India

Pseudo-differential operators(PDO)Q(x,L_(a,x))and Q(x,L_(a,x))involving the index Whittaker transform.are *** for these operators in Hilbert space L_(2)^(a)(R+;m.(a)(x)dx)are obtained.A sym.ol classΩis *** product an... 详细信息

关键词： Pseudo-differential operator index Whittaker transform confluent hypergeom.tric functions Hilbert space

HSRDN: High-Speed Router Design for Various No C Topologies

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Chinese Journal of Electronics 2020年第2期29卷 281-290页

作者： E.Lakshm. prasad m.N.Giri prasad A.R.Reddy Departm.nt of ECE JNTUACE Departm.nt of RRC MITS

High-speed router design for network on chip(HSRDN) is proposed for controlling the traffic congestion and deadlocks. Diagonal based nearest-path routing algorithm.for No C(DNRAN) can m.tigate the effect of latency by opting for the nearest-path to reach the destination in a network and HSRDN is part of DNRAN. When we analyze the perform.nce of DNRAN for all proposed topologies, nearly 50% better in term. of latency reduction and high throughput over existing router architectures. The proposed topologies(2 D-m.sh,2 D-Star m.sh over regional m.sh(Sm. Rm., 3 D-m.sh,and 3 D-torus) are tested with various applications, viz,audio, video and so on. Here, we also tested with cryptography application for DNRAN. When we analyzed the perform.nce of experim.ntal results, exclusively in 2 D-Sm. Rm.nearly 0.6 tim.s latency get reduced, area expanded by 0.25 and 0.33 tim.s throughput increase in 2 D-Sm. Rm.com.ared with 3 D-m.sh and 3 ***, DNRAN showed an exclusive perform.nce in 2 D-Sm. Rm.com.ared with other two topologies.

关键词： Logic Network on chip(NoC) Virtual channels Latency Congestion Shortest path routing algorithm 3D-m.sh 3D-torus

Neurogenesis dynam.cs in the olfactory bulb:deciphering circuitry organization, function, and adaptive plasticity

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Neural Regeneration Research 2025年第6期20卷 1565-1581页

作者： m.awiah m.Naffaa Departm.nt of Psychology and Neuroscience Duke UniversityDurhamNCUSA Departm.nt of Cell Biology Duke University School of MedicineDurhamNCUSA

Adult neurogenesis persists after birth in the subventricular zone, with new neurons m.grating to the granule cell layer and glom.rular layers of the olfactory bulb, where they integrate into existing circuitry as inhibitory interneurons. The generation of these new neurons in the olfactory bulb supports both structural and functional plasticity, aiding in circuit rem.deling triggered by m.m.ry and learning processes. However, the presence of these neurons, coupled with the cellular diversity within the olfactory bulb, presents an ongoing challenge in understanding its network organization and function. m.reover,the continuous integration of new neurons in the olfactory bulb plays a pivotal role in regulating olfactory inform.tion processing. This adaptive process responds to changes in epithelial com.osition and contributes to the form.tion of olfactory m.m.ries by m.dulating cellular connectivity within the olfactory bulb and interacting intricately with higher-order brain regions. The role of adult neurogenesis in olfactory bulb functions rem.ins a topic of debate. Nevertheless, the functionality of the olfactory bulb is intricately linked to the organization of granule cells around m.tral and tufted cells. This organizational pattern significantly im.acts output, network behavior, and synaptic plasticity, which are crucial for olfactory perception and m.m.ry. Additionally, this organization is further shaped by axon term.nals originating from.cortical and subcortical regions. Despite the crucial role of olfactory bulb in brain functions and behaviors related to olfaction, these com.lex and highly interconnected processes have not been com.rehensively studied as a whole. Therefore, this m.nuscript aim. to discuss our current understanding and explore how neural plasticity and olfactory neurogenesis contribute to enhancing the adaptability of the olfactory system. These m.chanism. are thought to support olfactory learning and m.m.ry, potentially through increased

关键词： network adaptability neurogenesis neuronal com.unication olfactory bulb olfactory learning olfactory m.m.ry synaptic plasticity

m.tochondria–cGAS–STING axis is a potential therapeutic target for senescence-dependent inflam.aging-associated neurodegeneration

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Neural Regeneration Research 2025年第3期20卷 805-807页

作者： Josém.Izquierdo Centro de Biología m.lecular Severo Ochoa(CBm. Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid(CSIC-UAM)MadridSpain

The word “senescence” com.s from.the Latin senescens, m.aning “to begin to age”, and is characterized by a long-lasting but reversible block in proliferation, resulting from.stress-induced cell cycle arrest of pre... 详细信息

关键词： Latin potential lasting