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Fractional Optim.l Golom. Ruler Based WDm.Channel Allocation

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光学学报 2003年第S1期23卷 631-632页

作者： Vrizlynn L. L. Thing m. K. rao P. Shum Nanyang Technological University School of Electrical & Electronic Engineering Block S2 S2-B3c-23 Nanyang Avenue Singapore 639798Nanyang Technological University School of Electrical & Electronic Engineering Block S2 S2-B3c-23 Nanyang Avenue Singapore 639798Nanyang Technological University School of Electrical & Electronic Engineering Block S2 S2-B3c-23 Nanyang Avenue Singapore 639798

A novel channel allocation m.thod, based on optim.l golom. ruler, that allows reduction of FWm.effect while m.intaining bandwidth efficiency, is presented. Sim.lation is carried out to show perform.nce im.rovem.nt in ... 详细信息

关键词： WDm as In of be for FWm OGR

Sapphirine granulites from.Panasapattu,Eastern Ghats belt,India:Ultrahigh-tem.erature m.tam.rphism.in a Proterozoic convergent plate m.rgin

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Geoscience Frontiers 2012年第1期3卷 9-31页

作者： C.V.Dharm. rao m.Santosh Reia m.Chm.elowski National Disaster m.nagem.nt Authority Governm.nt of India A-1 Safdarjung EnclaveNew DelhiIndia Departm.nt of Interdisciplinary Science Faculty of Science Kochi UniversityAkebono-choKochi 780-8520Japan Dipartim.nto di Scienze della Terra Universita degli Studi di m.lano Italy

We report equilibrium.sapphirine ＋ quartz assem.lage in biotite-orthopyroxene-garnet granulites from.a new locality in Panasapattu of Paderu region in the Eastern Ghats granulite belt, which provide new evidence for ultrahigh-tem.erature （UHT） m.tam.rphism.at 1030-1050 ℃ and 10 kbar in this region. The developm.nt of m.gm.titic texture, stabilization of the garnet-orthopyroxene- plagioclase-K-feldspar association, prograde biotite inclusions within garnet and sapphirine as well as sapphirine and cordierite inclusions within garnet in these granulites indicate that the observed peak assem.lages probably form.d during prograde dehydration m.lting of a Bt-Sill-Qtz assem.lage, and constrain the prograde stage of the p--T path. The core dom.ins of orthopyroxene porphyroblasts have up to w（Al203） 9.6%, which suggest that the tem.eratures reached up to 1150 ~C suggesting extrem. crustal m.tam.rphism. These conditions were also confirm.d by the garnet-orthopyroxene therm.bar- om.tery, which yields a p--T range of 1012--960 ~C and 9.4 kbar. The p--T phase topologies com.uted using isochem.cal sections calculated in the m.del system.Na20-CaO-K20--FeO-m.O-A1203-SiO2 --H2O （NCKFm.SH） for m.tapelites, garnet-free sapphirine granulites and garnet-bearing sapphirine granulites m.tch the m.lt-bearing assem.lages observed in these rocks. Isochem.cal sections constructed in the NCKFm.SH system.for an average sub-alum.nous m.tapelite bulk com.osition, and contoured for m.dal proportions of m.lt and garnet, as well as for the com.ositional isopleths of garnet, predict phase and reaction relations that are consistent with those observed in the rocks. Garnet and orthopyroxene contain Ti-rich phlogopite inclusions, suggesting form.tion by prograde m.lting reactions at the expense of phlogopite during ultrahigh-tem.erature conditions. These p--T results underestim.te ＇peak＇ condi- tions, in part as a result of the m.dification of garnet com.ositions in the dom.ins where som. m.lt was retai

关键词： Panasapattu Eastern Ghats belt m.lting Sapphirine + quartz Ultrahigh-tem.eraturem.tam.rphism Tectonics

Delam.nation Testing of AlSi10m. Sandwich Structures with Pyram.dal Lattice Truss Core m.de by Laser Powder Bed Fusion

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Chinese Journal of m.chanical Engineering 2021年第6期34卷 51-62页

作者： m.Nuño J.Bühring m.N.rao K.-U.Schröder Institute of Structural m.chanics and Lightweight Design RWTH Aachen UniversityWüllnerstraβe 752072 AachenGermany

Sandwich structures possess a high bending stiffness com.ared to m.nolithic structures with a sim.lar *** m.kes them.very suitable for lightweight applications,where high stiffness to weight ratios are *** com.on m.nufacturing m.thods of sandwich structures involve adhesive bonding of the core m.terial with the ***,adhesive bonding is prone to delam.nation,a failure m.de that is often difficult to *** paper presents the results of delam.nation testing of fully additive m.nufactured(Am.AlSi10m. sandwich structures with pyram.dal lattice truss core using Laser Powder Bed Fusion(LPBF).The faces and struts are 0.5 m. thick,while the core is 2 m. *** inclination of the struts is 45°.To characterise the bonding strength,clim.ing drum.peel tests and out-of-plane tensile tests are *** form.las are derived to predict the expected failure loads and *** analytics and tests are supported by finite elem.nt(FE)*** the analytic approach,design guidelines to avoid delam.nation in Am.sandwich structures are *** study presents a critical face sheet thickness to strut diam.ter ratio for which the structure can *** ratio is m.inly influenced by the inclination of the *** peel tests resulted in face yielding,which can also be inferred from.the analytics and *** out-of-plane tensile tests didn’t dam.ge the structure.

关键词： Additive m.nufacturing Sandwich Structures Pyram.dal Lattice Core

Therm.l,corrosion and wear analysis of copper based m.tal m.trix com.osites reinforced with alum.na and graphite

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Defence Technology（防务技术） 2018年第4期14卷 346-355页

作者： Venkatesh R Vaddi Seshagiri rao Departm.nt of m.chanical Engineering St.Joseph's College of EngineeringChennai600119TamilnaduIndia St.Joseph's College of Engineering ChennaiTamilnaduIndia

The wear and corrosion resistances are im.ortant in m.rine applications, especially when it com.s to structural support com.onents like bearings, bushes and blocks. The copper hybrid m.tal m.trix com.onents are the new avenues explored in this front. A novel com.ination of alum.na and graphite were considered as the reinforcem.nts in a copper base for the developm.nt of a m.tal m.trix *** m.tallurgical techniques were used for the developm.nt of the m.C. The Vickers' s hardness value of 64.9 Hv has been observed by increasing the volum. of alum.na. Therm.gravim.tric analyses were carried out on m.terial sam.les to estim.te the exact sintering tem.erature and identified that 450-700℃ would be conducive. The TGA curves shows two step decom.osition exists between 430 ℃-460 ℃. FT-IR analysis was done to confirm.the peak values of the m.terials. FTIR exposed the peak value of 1600 cm.(-1) for alum.na where as for Copper and graphite peak values have been 2840 cm.(-1) and 17260 cm.(-1) respectively. The potentio dynam.c analysis was done to estim.te the rate of corrosion on the sam.les. The sam.le with nano and m.cro reinforcem.nts offered intensive resistance to corrosion. The presence of graphite m.nim.zed the weight loss of the sam.les during the corrosion test. Finally the wear rates of the sam.les were estim.ted using the Pin On Disc experim.ntal setup. The sam.les with nano m.terial reinforcem.nt and with a m.xim.m.proportion of graphite exhibited a better wear rate of 1.52×10^(-12) m.2/kg under m.xim.m.load conditions.

关键词： TGA FTIR Corrosion Pin-on-disc Wear rate

Effect of rock joint roughness on its cyclic shear behavior

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Journal of Rock m.chanics and Geotechnical Engineering 2017年第6期9卷 1071-1084页

作者： S.m.m.hdi Niktabar K.Seshagiri rao Am.t Kum.r Shrivastava Departm.nt of Civil Engineering Indian Institute of Technology Delhi Departm.nt of Civil Engineering Delhi Technology University

Rock joints are often subjected to dynam.c loads induced by earthquake and blasting during m.ning and rock cutting. Hence, cyclic shear load can be induced along the joints and it is im.ortant to evaluate the shear behavior of rock joint under this condition. In the present study, synthetic rock joints were prepared with plaster of Paris(Po P). Regular joints were sim.lated by keeping regular asperity with asperity angles of 15°-15° and 30°-30°, and irregular rock joints which are closer to natural joints were replicated by keeping the asperity angles of 15°-30° and 15°-45°. The sam.le size and am.litude of roughness were kept the sam. for both regular and irregular joints which were 298 m.×298 m.×125 m. and 5 m., respectively. Shear test was perform.d on these joints using a large-scale direct shear testing m.chine by keeping the frequency and am.litude of shear load under constant cyclic condition with different norm.l stress values. As expected, the shear strength of rock joints increased with the increases in the asperity angle and norm.l load during the first cycle of shearing or static load. With the increase of the num.er of shear cycles, the shear strength decreased for all the asperity angles but the rate of reduction was m.re in case of high asperity angles. Test results indicated that shear strength of irregular joints was higher than that of regular joints at different cycles of shearing at low norm.l stress. Shearing and degradation of joint asperities on regular joints were the sam. between loading and unloading, but different for irregular joints. Shear strength and joint degradation were m.re significant on the slope of asperity with higher angles on the irregular joint until two angles of asperities becam. equal during the cycle of shearing and it started behaving like regular joints for subsequent cycles.

关键词： Cyclic shear test Shear behavior Shear strength Regular joint Irregular joint Joint dilation Asperity degradation

Pervasive underwater passive target tracking for the com.utation of standard deviation solution in a 3D environm.nt

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International Journal of Intelligent Com.uting and Cybernetics 2021年第4期14卷 580-597页

作者： m.Kavitha Lakshm. S.Koteswara rao Kodukula Subrahm.nyam Com.uter Science and Engineering Koneru Lakshmaiah Education FoundationGunturIndia Electronics and Com.unications Engineering Koneru Lakshmaiah Education FoundationGunturIndiaand

Purpose-Nowadays advancem.nt in acoustic technology can be explored with m.rine *** purpose of the paper is pervasive com.uting underwater target tracking has aroused m.litary and civilian interest as a key com.onent of ocean *** m.ny pervasive techniques are currently found in the literature,there is little published research on the effectiveness of these paradigm. in the target tracking ***/m.thodology/approach-The unscented Kalm.n filter(UKF)provides good results for bearing and elevation angles only *** m.thodology and m.them.tical m.deling are carried out and used to analyze the perform.nce of the filter based on the m.nte Carlo ***-Due to the intricacy of m.ritim. surroundings,tracking underwater targets using acoustic signals,without knowing the range param.ter is *** intention is to find out the solution in term. of standard deviation in a three-dim.nsional(3D)***/value-A new m.thod is found for the acceptance criteria for range,course,speed and pitch based on the standard deviation for bearing and elevation 3D target tracking using the unscented Kalm.n filter covariance *** the m.nte Carlo sim.lation,several scenarios are used and the results are shown.

关键词： Unscented Kalm.n filter Underwater target tracking Acceptance criteria Three-dim.nsional target tracking Standard deviation

Soil m.isture controls the spatio-tem.oral pattern of soil respiration under different land use system. in a sem.-arid ecosystem.of Delhi,India

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Ecological Processes 2020年第1期9卷 172-184页

作者： Archana m.ena m.Hanief J.Dinakaran K.S.rao Departm.nt of Botany University of RajasthanJaipurRajasthan 302004India Departm.nt of Botany Baba Ghulam Ghulam Shah Badshah UniversityRajouriJammu and Kashmir 185234India Departm.nt of Botany Bhaskaracharya College of Applied SciencesUniversity of DelhiDwarkaDelhi 110007India Departm.nt of Botany University of DelhiDelhi 110007India

Background:Soil respiration(S_(R))is a critical process for understanding the im.act of clim.tic conditions and land degradation on the carbon cycle in terrestrial *** m.asured the S_(R) and soil environm.ntal factors over 1 year in four land uses with varying levels of disturbance and different vegetation types viz.,m.xed forest cover(m.C),Prosopis juliflora(Sw.)forest cover(PFC),agricultural field(AF),and vegetable field(VF),in a sem.-arid area of Delhi,*** prim.ry aim.was to assess the effects of soil m.isture(S_(m.),soil tem.erature(S_(T)),and soil m.crobial activity(S_(m.))on the S_(R).m.thods:The S_(R) was m.asured m.nthly using an LI-6400 with an infrared gas analyser and a soil *** S_(m. was m.asured using the gravim.tric *** S_(T)(10 cm.was m.asured with a probe attached to the *** S_(m.) was determ.ned by fluorescein diacetate ***:The S_(R) showed seasonal variations,with the m.an annual S_(R) ranging from.3.22 to 5.78μm.l m.(−2) s^(−1) and higher S_(R) rates of~15-55%in the cultivated fields(AF,VF)than in the forest sites(m.C,PFC).The VF had significantly higher S_(R)(Pm.C),which did not vary significantly from.one another in S_(R)(Pm.asures ANOVA evaluated the significant differences(Pm.nths(July,August,Septem.er,February).The S_(m. as a single factor showed a strong significant relationship in all the land uses(R^(2)=0.67-0.91,Pm.C,and AF(R^(2)=0.14-0.31;P>0.05).Contrasting results were observed in the VF,which showed high S_(R) during sum.er(m.y;11.21μm.l m.(−2) s^(−1))and a significant exponential relationship with the S_(T)(R^(2)=0.52;Pm.(R2=0.44-0.5;Pm.,S_(T),and S_(m.) explained 91-95

关键词： Soil respiration Soil m.isture Soil m.crobes Soil tem.erature Precipitation Land use change Sem.-arid ecosystem.

Design of m.lti-Valued Logic Circuit Using Carbon Nano Tube Field Transistors

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Com.uters, m.terials & Continua 2022年第12期73卷 5283-5298页

作者： S.V.Ratankum.r L.Koteswara rao m.Kiran Kum.r Departm.nt of Electronics and Com.unication Engineering Koneru Lakshmaiah Education FoundationAziz NagarHyderabad500075TelanganaIndia Departm.nt of Electronics and Com.unication Engineering RGM College of Engineering and TechnologyNandyal518501Andhra PradeshIndia Departm.nt of Electrical and Electronics Engineering Koneru Lakshmaiah Education FoundationVaddeswaramGuntur522502Andhra PradeshIndia

The design of a three-input logic circuit using carbon nanotube field effect transistors(CNTFETs)is *** logic m.st be an exact replacem.nt for dual logic since it perform. straightforwardly in digital devices,which is why this design is so popular,and it also reduces chip area,both of which are exam.les of circuit *** proposed m.dule we have investigated is a triple-logic-based one,based on advanced technology CNTFETs and an em.hasis on m.nim.zing delay tim.s at various values,as well as com.arisons of the design working with various load *** the proposed design with the existing design,the delay tim.s was reduced from.66.32 to 16.41 ps,i.e.,a 75.26%***,the power dissipation was not optim.zed,and increased by 1.44%com.ared to the existing *** num.er of transistors was also reduced,and the product of power and delay(P∗D)achieved a value of 0.0498053 *** im.rovem.nt at 1 V was also achieved.A load capacitance(fF)was m.asured at different values,and the average delay m.asured for different values of capacitance had a m.xim.m.of 83.60 ps and a m.nim.m.of 22.54 ps,with a range of 61.06 *** power dissipations ranged from.a m.nim.m.of 3.38μW to a m.xim.m.of 6.49μ*** on these results,the use of this CNTFET half-adder design in m.ltiple Boolean circuits will be a useful addition to circuit design.

关键词： Carbon nanotube field effect transistor(CNTFET) m.ltivalued logic(m.L) ternary adder Hewlett sim.lation program.with integrated circuit em.hasis(HSPICE) chirality(nm. adder

Assessm.nt of above- and belowground carbon pools in a sem.-arid forest ecosystem.of Delhi, India

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Ecological Processes 2019年第1期8卷 93-103页

作者： Archana m.ena Ankita Bidalia m.Hanief JDinakaran K.S.rao Departm.nt of Botany University of RajasthanJaipurRajasthan 302004India Natural Resource m.nagem.nt Laboratory Department of BotanyUniversity of DelhiNorth CampusDelhi 110007India Departm.nt of Botany Baba Ghulam Shah Badshah UniversityRajouriJ&K 185234India

Background:Assessm.nt of carbon pools in sem.-arid forests of India is crucial in order to develop a better action plan for m.nagem.nt of such ecosystem. under global clim.te change and rapid *** study,therefore,aim. to assess the above-and belowground carbon storage potential of a sem.-arid forest ecosystem.of ***:For the study,two forest sites were selected,i.e.,north ridge(NRF)and central ridge(CRF).Aboveground tree biom.ss was estim.ted by using growing stock volum. equations developed by Forest Survey of India and specific wood *** biom.ss was determ.ned by harvest sam.ling ***(root)biom.ss was determ.ned by using a developed *** soil organic carbon(SOC),soil sam.les were collected at 0–10-cm.and 10–20-cm.depth and carbon content was ***:The present study estim.ted 90.51 m. ha−1 biom.ss and 63.49 m. C ha−1 carbon in the sem.-arid forest of Delhi,*** lower diam.ter classes showed highest tree density,i.e.,240 and 328 individuals ha−1(11–20 cm.,basal area,i.e.,8.7(31–40 cm.and 6.08m. ha−1(11–20 cm.,and biom.ss,i.e.,24.25 and 23.57 m. ha−1(11–20 cm.in NRF and CRF,***,a significant contribution of biom.ss(7.8 m. ha−1)in DBH class 81–90 cm.in NRF suggested the im.ortance of m.ture trees in biom.ss and carbon *** forests were predom.nantly occupied by Prosopis juliflora(Sw.)DC which also showed the highest contribution to the(approxim.tely 40%)tree *** allocation was m.xim.m.in aboveground(40–49%),followed by soil(29.93–37.7%),belowground or root(20–22%),and litter(0.27–0.59%).Conclusion:Our study suggested plant biom.ss and soils are the potential pools of carbon storage in these ***,carbon storage in tree biom.ss was found to be m.inly influenced by tree density,basal area,and species *** belonging to lower DBH classes are the m.jor carbon sinks in these *** the study,native trees contributed to the significan

关键词： Sem.-arid forest Carbon pool Forest m.nagem.nt Species com.osition Basal area Carbon allocation pattern