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Geomater.als 2011年第3期1卷 79-87页

作者： r. k. umrao r. Singh M. Ahmad T. N. Singh 不详

In mountain ter.ains of Himalaya, r.ad and highway networ.s play a vital r.le in r.mote ar.as for.tr.nspor.ation, public networ. and all k.nd of socio-economic activities. The stability of r.ck.slopes along the r.ads and highways is a major.concer. in these hilly r.gions. Any k.nd of slope failur. may lead to disr.ption in tr.ffic, loss of pr.per.ies and lives/injur.es as well as envir.nmental degr.dation. The unplanned excavations of r.ck.slopes for.constr.ction or.widening pur.oses may under.ine the stability of the slopes. The pr.sent study incor.or.tes the stability analysis of r.ad cut slopes along NH-109 which goes to holy shr.ne of k.dar.ath. Slope failur. is not only a phenomenon of r.iny season but it has also been encounter.d even in dr. season. The study ar.a exper.ences high vehicular.tr.ffic especially fr.m Mar.h to August due to pilgr.ms since it is the only r.ad to k.dar.ath. The distance of about 20 k. between r.dr.pr.yag and Agastmuni has been investigated. The continuous slope mass r.ting (CSMr. technique has been used for.slope stability analysis at five differ.nt locations. CSMr.is modification of or.ginal slope mass r.ting (SMr. pr.posed by r.mana which is based on well established r.ck.mass r.ting (r.r. technique. k.nematic analysis was also car.ied out to evaluate these sites for.types of failur. and its potential failur. dir.ctions. The potentially vulner.ble sites wer. identified. The r.sults indicate that the CSMr.technique may be exploited to assess the stability of r.ck.slopes in the Himalayan ter.itor..

关键词： SMr CSMr r.r Slope Stability r.dr.pr.yag

Assessment of r.ck.all Hazar. along the r.ad Cut Slopes of State Highway-72, Mahar.shtr., India

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Geomater.als 2013年第1期3卷 15-23页

作者： M. Ahmad r. k. umrao M. k. Ansar. r.jesh Singh T. N. Singh Depar.ment of Ear.h Sciences Indian Institute of Technology Bombay Powai Mumbai India

r.ck.all is a major.pr.blem in high hill slopes and r.ck. mountainous r.gions and constr.ction of highways at these r.ck.all pr.ne ar.as often r.quir. stable slopes. The causes of r.ck.all ar. pr.sence of discontinuities, high angle cut slopes, heavy r.infall, and unplanned slope geometr. etc. Slope geometr. is one of the most tr.gger.ng par.meter. for.r.ck.all, when ther. ar. var.ations in slope angle along the pr.file of slope. The Pr.sent study involves r.ck.all hazar. assessment of r.ad cut slopes for.15 k. distance star.ing fr.m Mahabaleshwar.town along State Highway-72 (SH-72). The ver.ical to subver.ical cut slopes ar. pr.ne to instability due to unfavor.ble or.entation of discontinuities in slope face of weather.d and alter.d basaltic r.ck.ass. The pr.dominant type of instability has been found as wedge type failur. involving medium to lar.e size block.. In or.er.to investigate the existing stability conditions, analyses wer. car.ied out at two locations under.differ.nt slope conditions. The k.nematic analysis was per.or.ed using ster.ogr.phic pr.jection method. r.ck.all 4.0 numer.cal simulator.softwar. was used to calculate the maximum bounce heights, total k.netic ener.ies and tr.nslational velocities of the falling r.ck.ass block., and a compar.tive analysis is pr.sented with incr.asing the mass of block. and height of the slope. The r.sult of numer.cal analysis shows that var.ing slope angle geometr. cr.ates mor. pr.blems as compar.d to the mass of block. in the scenar.o of r.ck.all.

关键词： r.ck.all Bounce Height k.netic Ener.y Tr.nsver.e Velocity Mahabaleshwar SH-72

EXPEr.MENTAL AND NUMEr.CAL ANALYSIS OF LAMINAr.AND LOW TUr.ULENT FLOW DISTr.BUTIONS IN INLET DIVIDING HEADEr.OF SHELL AND TUBE HEAT EXCHANGEr

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Jour.al of Hydr.dynamics 2010年第4期22卷 494-502页

作者： k.NNAN k. r.Dr.MOOr.HY r. Depar.ment of Pr.duction Engineer.ng PSG College of Technology

Flow distr.bution header. play a major.r.le in heat *** selection of header.diameter.br.nch pipe diameter.br.nch pipe spacing *** based on the designer.s exper.ence and gener.l guide *** pr.per.selection of the header.dimensions will yield unifor. flow distr.bution in heat exchanger.,which in tur. will enhance the heat exchanger.*** this wor.,the flow distr.bution in br.nch pipes and the pr.ssur. var.ation acr.ss the br.nch pipes in laminar.and low tur.ulence r.gion is studied with two models of the inlet dividing *** the numer.cal analysis has been applied,its inability to pr.dict the no flow condition thr.ugh the br.nch pipes is *** r.sults ar. pr.sented in the for. of flow r.te r.tio thr.ugh br.nch pipes and nondimensional coefficients acr.ss br.nch pipes which ar. useful to apply the existing mathematical models for.the pr.sent exper.mental setup.

关键词： shell and tube heat exchanger inlet dividing header unifor. flow distr.bution exper.mental setups numer.cal analysis

Activator.assisted electr.less deposition of copper.nanostr.ctur.d films

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Inter.ational Jour.al of Miner.ls,Metallur.y and Mater.als 2014年第2期21卷 196-203页

作者： Var.ha r. Mehto r. k. Pandey Depar.ment of Physics Barkatullah University NIIT Univer.ity

This paper.showed simple and effective synthesis of copper.nanopar.icles within contr.lled diameter.using dir.ct electr.less deposition on glass substr.tes, following the sensitization and activation steps. Electr.less-deposited metals, such as Cu, Co, Ni, and Ag, and their.alloys had many advantages in micr.- and nanotechnologies. The str.ctur.l, mor.hological, and optical pr.per.ies of copper.deposits wer. char.cter.zed using X-r.y diffr.ction （Xr.）, atomic for.e micr.scopy （AFM）, and UV-Vis spectr.scopy. The str.ctur.l data was fur.her.analyzed using the r.etveld r.finement pr.gr.m. Str.ctur.l studies r.veal that the deposited copper.pr.fer. a （111） or.entation. AFM studies suggest the deposited mater.als for. compact, unifor., and nanocr.stalline phases with a high tendency to self-or.anize. The data show that the par.icle size can be contr.lled by contr.lling the activator.concentr.tion. The absor.tion spectr. of the as-deposited copper.nanopar.icles r.veal that the plasmonic peak.br.adens and exhibits a blue shift with decr.asing par.icle size.

关键词： nanostr.ctur.d mater.als thin films copper electr.less plating deposition

Photolysis studies on HCOOH and HCOO^- in pr.sence of TiO_2 photocatalyst as suspension in aqueous medium

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Jour.al of Natur.l Gas Chemistr. 2009年第1期18卷 50-54页

作者： G. r. Dey k. N. r. Nair.k. k. Pushpa r.diation and Photochemistr. Division Bhabha Atomic Research Centre Trombay Mumbai 400 085 India

Photolysis studies on for.ic acid （HCOOH） and for.ate ion （HCOO-） in pr.sence of TiO2, a photocatalyst, as suspension in water.wer. car.ied out separ.tely using 350 nm ultr.violet light. The pr.ducts, such as H2, CO, CO2 and CH4, gener.ted dur.ng the exper.ments wer. monitor.d with var.ing the ambient, light exposur. time, and the concentr.tion of HCOOH/HCOO-. The yields of CO in all these systems incr.ased with light exposur. time. In aer.ted systems, CO yields wer. higher.in contr.st to the deoxygenated （Ar.pur.ed） systems under.identical conditions. It is pr.posed appar.ntly that the for.ation of CO is tak.ng place dur.ng the chemical r.duction of in-situ gener.ted CO2, a photo-miner.lized pr.duct of HCOOH/HCOO-, but not thr.ugh the dir.ct photodecomposition or.photodehydr.tion （CO＋H2O） of solute molecules. The r.tes of CO for.ation dur.ng 1.3 M HCOOH photolysis in pr.sence of TiO2 photocatalyst wer. evaluated to be 0.21 and 0.13 μl/min in aer.ted and Ar.pur.ed systems, r.spectively. As compar.d with HCOOH systems, the CO yields ar. lower.when 0.2 M HCOONa was exposed to light under.identical conditions. The CO gr.wth r.tes wer. evaluated to be 0.07 and 0.046 μl/min^-1 for.aer.ted and deoxygenated HCOONa systems, r.spectively; mor.over. the tr.nd is quite similar.to that of the HCOOH system. Under.these conditions, the emission of H2 was also obser.ed, and its yield was significantly higher.in Ar.pur.ed system as compar.d with the CO yields. However. in aer.ted system, the yields of these pr.ducts wer. just opposite. The for.ation of low yield of methane was obser.ed dur.ng photolysis of HCOOH/HCOO ions. In CO2 ambient, the yields of CO and H2 var.ed dr.stically with time.

关键词： for.ic acid for.ate ion photolysis TiO2

Complex var.able appr.ach in studying modified polar.zation satur.tion model in two-dimensional semiper.eable piezoelectr.c media

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Applied Mathematics and Mechanics(English Edition) 2017年第11期38卷 1517-1532页

作者： S. SINGH k. SHAr.A r. r. BHAr.AVA Depar.ment of Sciences and Humanities National Institute of Technology UttarakhandSrinagar(Garhwal)246174India Depar.ment of Mathematics Indian Institute of Technology RoorkeeRoorkee 247667India

A modified polar.zation satur.tion model is pr.posed and addr.ssed math- ematically using a complex var.able appr.ach in two-dimensional （2D） semiper.eable piezoelectr.c media. In this model, an existing polar.zation satur.tion （PS） model in 2D piezoelectr.c media is modified by consider.ng a linear.y var.ing satur.ted nor.al electr.c displacement load in place of a constant nor.al electr.c displacement load, applied on a satur.ted electr.c zone. A centr. cr.ck.d infinite 2D piezoelectr.c domain subject to an ar.itr.r. poling dir.ction and in-plane electr.mechanical loadings is consider.d for.the analytical and numer.cal studies. Her., the pr.blem is mathematically modeled as a non-homogeneous r.emann-Hilber. pr.blem in ter.s of unk.own complex potential functions r.pr.senting electr.c displacement and str.ss components. Having solved the Hilber. pr.blem, the solutions to the satur.ted zone length, the cr.ck.opening displace- ment （COD）, the cr.ck.opening potential （COP）, and the local str.ss intensity factor. （SIFs） ar. obtained in explicit for.s. A numer.cal study is also pr.sented for.the pr.posed modified model, showing the effects of the satur.tion condition on the applied electr.cal loading, the satur.tion zone length, and the COP. The r.sults of fr.ctur. par.meter. obtained fr.m the pr.posed model ar. compar.d with the existing PS model subject to electr.cal loading, cr.ck.face conditions, and polar.zation angles.

关键词： complex var.able fr.ctur. par.meter local str.ss intensity factor.(SIF),piezoelectr.c polar.zation satur.tion (PS) model

Adaptations of phytoplank.on in the Indian Ocean sector.of the Souther. Ocean dur.ng austr.l summer.of 1998-2014

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Fr.ntier. of Ear.h Science 2015年第4期9卷 742-752页

作者： r. k. MISHr. r. k. NAIk.N. ANIL k.MAr ESSO-National Centr. for.Antar.tic and Ocean r.sear.h Ministry of Earth Sciences (MoES) Vasco-da-Gama Goa India

This study investigates the effects of light and temper.tur. on the sur.ace water.diatoms and chlor.- phytes, phytoplank.on in the Indian Ocean sector.of the Souther. Ocean （SO） dur.ng the austr.l summer.of 1998- 2014. Significant longitudinal var.ations in hydr.gr.phic and biological par.meter. wer. obser.ed at the Sub tr.pical fr.nt （STF）, Sub Antar.tic fr.nt （SAF） and Polar.fr.nt （PF） along 56°E-58°E. The concentr.tions of total sur.ace chlor.phyll a （Chl a）, diatoms, and chlor.phytes measur.d by the National Aer.nautics Space Agency （NASA） estimated by the Sea-Viewing Wide Field-of- View Sensor. （SeaWiFS）, the Moder.te r.solution Imaging Spectr. r.diometer.（MODIS）, and the NASA Ocean Biological Model （NOBM） wer. used in the study. Var.ations in the concentr.tion of total Chl a was r.mar.able amongst the fr.nts dur.ng the study per.od. The contr.bution of diatoms to the total concentr.tion of sur.ace Chl a incr.ased towar.s south fr.m the STF to the PF while it decr.ased in the case of chlor.phytes. The maximum photosynthetically active r.diation （PAr. was obser.ed at the STF and it pr.gr.ssively decr.ased to the PF thr.ugh the SAF. At the PF r.gion the contr.bution of diatoms to the total Chl a biomass was ≥80%. On the other.hand, the chlor.phytes showed a contr.r. distr.bution patter. with ≥ 70% of the total Chl a biomass r.cor.ed at the STF which gr.dually decr.ased towar.s the PF, mainly attr.buted to the temper.te adaptation. This clear.y r.veals that the tr.nd of diatoms incr.ased at the STF and decr.ased at the SAF and the PF. Fur.her. the tr.nd of chlor.phytes was incr.ased at the STF, SAF and PF with a shift in the community in the fr.ntal system of the Indian Ocean sector.of the SO.

关键词： chlor.phyll a diatoms chlor.phytes SST,PAr Souther. Ocean

Velocity Cur.e Analysis of Spectr.scopic Binar. Star. AI Phe,GM Dr.,HD 93917 and V502 Oph by Nonlinear.r.gr.ssion

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Chinese Jour.al of Astr.nomy and Astr.physics 2007年第4期7卷 558-564页

作者： k. k.r.mi r. Mohebi Depar.ment of Physics University of KurdistanPasdaran St.P. O. Box 66177-15175Sanandaj Iran Research Institute for Astronomy & Astrophysics of Maragha (RIAAM)P. O. Box 55134-441MaraghaIran Institute for Advanced Studies in Basic Sciences(IASBS)Gava ZangP. O. Box 45195-1159Zanjan Iran Institute for.Advanced Studies in Basic Sciences(IASBS) Gava ZangP. O. Box 45195-1159Zanjan Iran

We intr.duce a new method to der.ve the or.ital par.meter. of spectr.scopic binar. star. by nonlinear.least squar.s of （o - c）. Using the measur.d r.dial velocity data of the four.double lined spectr.scopic binar. systems, AI Phe, GM Dr., HD 93917 and V502 Oph, we der.ved both the or.ital and combined spectr.scopic elements of these systems. Our.numer.cal r.sults ar. in good agr.ement with the those obtained using the method of Lehmann-Filhés.

关键词： star.: binar.es: eclipsing - star.: binar.es: spectr.scopic

Semantic r.le Based Image Visual Featur. Ontology Cr.ation

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Inter.ational Jour.al of Automation and computing 2014年第5期11卷 489-499页

作者： r. I. Minu k. k. Thyaghar.jan Depar.ment of Computer.Science & Engineer.ng Jerusalem College of Engineering r.D Engineer.ng College

Multimedia is one of the impor.ant communication channels for.mank.nd. Due to the advancement in technology and enor.ous gr.wth of mank.nd, a vast ar.ay of multimedia data is available today. This has r.sulted in the obvious need for.some techniques for.r.tr.eving these data. This paper.will give an over.iew of ontology-based image r.tr.eval system for.aster.ideae flower.family domain. In or.er.to r.duce the semantic gap between the low-level visual featur.s of an image and the high-level domain k.owledge, we have incor.or.ted a concept of multi-modal image ontology. So, the cr.ated aster.ideae flower.domain specific ontology would have the k.owledge about the domain and the visual featur.s. The visual featur.s used to define the ontology ar. pr.valent color.basic intr.nsic patter. and contour.gr.dient. In pr.valent color.extr.ction, the most dominant color.fr.m the images was identified and indexed. In or.er.to deter.ine the textur. patter. for.a par.icular.flower. basic intr.nsic patter.s wer. used. The contour.gr.dients pr.vide the infor.ation on the image edges with r.spect to the image base. These featur. values ar. embedded in the ontology at appr.pr.ate slots with r.spect to the domain k.owledge. This paper.also defines some of the quer. axioms which ar. used to r.tr.eve appr.pr.ate infor.ation fr.m the cr.ated ontology. This ontology can be used for.image r.tr.eval system in semantic web.

关键词： Infor.ation and k.owledge computer.vision intelligent computing featur. extr.ction ontology

Distr.bution of Pill Millipedes (Ar.hr.sphaer.) and Associated Soil Fauna in the Wester. Ghats and West Coast of India

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Pedospher. 2008年第6期18卷 749-757页

作者： k. M. ASHWINI k. r. Sr.DHAr Micr.biology and Biotechnology Department of Biosciences Mangalore University Mangalagangotri

Seven sampling sites in each of thr.e biomes (Wester. Ghats, foothills of Wester. Ghats and west coast) of south- wester. India wer. investigated to study the distr.bution, abundance and ecology of pill millipedes (Ar.hr.sphaer.) and associated fauna in r.lation to edaphic featur.s. Abundance and biomass of Ar.hr.sphaer. and other.millipedes wer. the highest in Wester. Ghats, while ear.hwor.s wer. in foothills. Ar.hr.sphaer. magna and Ar.hr.sphaer. spp. wer. common in Wester. Ghats and foothills r.spectively, while no Ar.hr.sphaer. wer. found in the west coast. None of the sampling sites consisted of mor. than one species of Ar.hr.sphaer.. Biomass of Ar.hr.sphaer., other.millipedes and ear.hwor.s significantly differ.d in Wester. Ghats (P = 9.48 × 10-7) and foothills (P = 1.35 × 10-8), as did the biomass of species of Ar.hr.sphaer. (P = 2.76 × 10-7) between Wester. Ghats and foothills. Cor.elation analysis r.vealed that biomass of Ar.hr.sphaer. was significantly (P = 0.01, r.= 0.45) cor.elated with soil or.anic car.on r.ther.than other.edaphic fea- tur.s (pH, phosphate, calcium and magnesium). Distr.bution patter., abundance, biomass and ecology of Ar.hr.sphaer. of Wester. Ghats in r.lation to soil qualities wer. compar.d with millipedes of other.r.gions of the wor.d.

关键词： Ar.hr.sphaer. distr.bution edaphic featur.s pill millipedes Wester. Ghats