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journal of Hydrodynamics 2019年第5期31卷 999-1010页

作者： j.j.Stephen S.A.Sannasiraj v.Sundar Department of Ocean Engineering Indian Institute of Technology MadrasChennai 600036India

The sloshing phenomenon of liquid in a partially filled tank mounted rigidly within a barge exposed to regular wave field has been considered for numerical *** paper details the numerical scheme developed in time domain to study the interaction of wave induced barge motion with sloshing oscillations in a partially filled *** sloshing time history results obtained from the numerical scheme adopted are validated with experimental measurements of Nasar et al.(2008)The harmonics present in the sloshing oscillation for the liquid fill levels(25%,50%and 75%)have been analyzed.

关键词： Floating barge sloshing finite element method impulse response function coupled analysis

Mooring System Optimisation and Effect of Different Line Design variables on Motions of Truss Spar Platforms in Intact and Damaged Conditions

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China Ocean Engineering 2019年第4期33卷 385-397页

作者： O.A. Montasir A. Yenduri v.j. Kurian Department of Civil and Environmental Engineering Universiti Teknologi PETRONAS Seri Iskandar Tronoh Perak 32610 Malaysia Department of Civil Engineering National University of Singapore 117576 Singapore Dean of Research and Development Providence College of Engineering Chengannur Alappuzha Kerala 689122 India

This paper presents the effect of mooring diameters, fairlead slopes and pretensions on the dynamic responses of a truss spar platform in intact and damaged line conditions. The platform is modelled as a rigid body with three degrees-of-freedom and its motions are analysed in time-domain using the implicit Newmark Beta technique. The mooring restoring force-excursion relationship is evaluated using quasi-static approach. MATLAB codes DATSpar and QSAML, are developed to compute the dynamic responses of truss spar platform and to determine the mooring system stiffness. To eliminate the conventional trial and error approach in the mooring system design, a numerical tool is also developed and described in this paper for optimising the mooring configuration. It has a graphical user interface and includes regrouping particle swarm optimisation technique combined with DATSpar and QSAML. A case study of truss spar platform with ten mooring lines is analysed using this numerical tool. The results show that optimum mooring system design benefits the oil and gas industry to economise the project cost in terms of material, weight, structural load onto the platform as well as manpower requirements. This tool is useful especially for the preliminary design of truss spar platforms and its mooring system.

关键词： mooring optimisation spar platform particle swarm Morison equation implicit Newmark beta quasi-static

Instability of binary nanofluids with magnetic field

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Applied Mathematics and Mechanics(English Edition) 2015年第6期36卷 693-706页

作者： U.GUPTA j.SHARMA v.SHARMA Dr.S.S.Bhatnagar University Institute of Chemical Engineering and Technology Panjab University Energy Research Centre Panjab University Department of Mathematics Himachal Pradesh University

The present paper investigates the effects of a vertical magnetic field on the double diffusive nanofluid convection, The effects of the Brownian motion and ther- mophoresis due to the presence of nanoparticles and the effects of the Dufour and Sorer parameters due to the presence of solute are included in the investigated model. The normal mode technique is used to solve the conservation equations. For the analytical study, valid approximations are made in the complex expression for the Rayleigh number to get useful and interesting results. The bottom heavy binary nanofluids are more stable than the regular binary fluids, while the top heavy binary nanofluids are less stable than the regular binary fluids. The critical wave number and the critical Rayleigh number in- crease whereas the frequency of oscillation （for the bottom heavy configuration） decreases when the Chandrasekhar number increases. The numerical results for the alumina-water nanofiuid are studied by use of the MATHEMATICA software.

关键词： natural convection binary nanofluid Brownian motion thermophoresis,Chandrasekhar number

Predicting the inhibition efficiencies of magnesium dissolution modulators using sparse machine learning models

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npj Computational Materials 2021年第1期7卷 1783-1791页

作者： Elisabeth j.Schiessler Tim würger Sviatlana v.Lamaka Robert H.Meißner Christian j.Cyron Mikhail L.Zheludkevich Christian Feiler Roland C.Aydin Institute of Material Systems Modeling Helmholtz-Zentrum HereonGeesthachtGermany Institute of Surface Science Helmholtz-Zentrum HereonGeesthachtGermany Institute of Polymers and Composites Hamburg University of TechnologyHamburgGermany Institute for Continuum and Material Mechanics Hamburg University of TechnologyHamburgGermany Institute for Materials Science Faculty of EngineeringKiel UniversityKielGermany

The degradation behaviour of magnesium and its alloys can be tuned by small organic ***,an automatic identification of effective organic additives within the vast chemical space of potential compounds needs sophisticated ***,we propose two systematic approaches of sparse feature selection for identifying molecular descriptors that are most relevant for the corrosion inhibition efficiency of chemical *** is based on the classical statistical tool of analysis of variance,the other one based on random *** demonstrate how both can—when combined with deep neural networks—help to predict the corrosion inhibition efficiencies of chemical compounds for the magnesium alloy *** particular,we demonstrate that this framework outperforms predictions relying on a random selection of molecular ***,we point out how autoencoders could be used in the future to enable even more accurate automated predictions of corrosion inhibition efficiencies.

关键词： corrosion alloy magnesium

Listening to People and Places teacher's tapescript v j COOK.

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Listening to People and Places teacher's tapescript V J COOK...

Effect of Added Arabinoxylans Isolated from Good and Poor Chapati Making wheat varieties on Rheological Properties of Dough and Chapati Making Quality

1984年

作者： v j COOK.

来源：畅想之星图书光盘版（南... 评论

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Food and Nutrition Sciences 2013年第9期4卷 884-892页

作者： Mysore S. Hemalatha Ragu Sai manohar Paramahans v. Salimath Ummiti j. S. Prasada Rao Biochemistry and Nutrition Department Central Food Technological Research Institute Mysore India Biochemistry and Nutrition Department Central Food Technological Research Institute Mysore India Flour Milling Baking and Confectionary Technology Department Central Food Technological Research Institute Mysore India.

Arabinoxylans are the major non-starch polysaccharides in wheat and are reported to influence quality of bakery products. Arabinoxylans were isolated from good and poor chapati making varieties, added them at different levels (0.25 and 0.5 g/100g) to the same flour, interchanged with other varieties and determined the effect of arabinoxylans on rheological properties of dough and chapati making quality. Rheological properties were improved upon adding isolated arabinoxylans of good chapati making varieties to flours. Interestingly, addition of isolated arabinoxylans of good chapati making varieties to poor chapati making varieties had significantly improved the chapati quality. Sensory studies showed that chapatis prepared from flour added with arabinoxylans of good chapati varieties had soft texture and high overall quality scores. These changes are attributed to differences in their arabinose/xylose ratio. Thus, results indicated that addition of isolated arabinoxylans of good chapati making flour improved the chapati quality of poor chapati making flour.

关键词： wheat Arabinoxylans Rheology Chapati

Kinetics of Hydrogen Molecules in MAGNUM-PSI

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Plasma Science and Technology 2008年第2期10卷 162-169页

作者： M.BAEvA w.j.GOEDHEER N.j.LOPES CARDOZO Leibniz Institute for Plasma Science and Technology Felix-Hausdorf-Str. 2 D-17489 Greifswald Germany FOM-Institute for Plasma Physics Rijnhuizen Association EURATOM-FOM Trilateral Euregio Cluster P. O. Box 1207 3430 BE Nieuwegein The Netherlands

Results from simulations of plasma and neutrals under conditions predictively characterizing the detached plasma regime in the linear machine MAGNUM-PSI are presented. The relaxation of the vibrationally excited hydrogen molecules is investigated in order to establish a relation between their relaxation and dwell times, and the role of the varions mechanisms of the molecular vibrational kinetics. Tile results obtained show that the individual vibrational states have to be inclllded in the transport code for neutrals as distinct species, since the relaxation time of tile vibrational states is sufficiently longer than the typical dwell time of hydrogen molecules in the detached plasma region. The parameters of plasma and neutrals are affected by the transport of the vibrationally excited hydrogen lnolecnles. Furthermore. the rate of molecular reconlbination is overestimated by a factor of - 5 provided that the transport of ilydrogen molecules only in their ground vibrational state is considered. The role of the various processes of vibrational kinetics is studied. The vibrational excitation through singlet electronic states ires a strong influence on the molecular densities for levels with vibrational quantum numbers v≥ 5. vibration-vibration （v-v） collisions between vibrationally excited hydrogen molecules and vibration-translation （v-T） collisions between vibrationally excited hydrogen molecules and ground state molecules and atoms are of nlinor importance in MAGNUM-PSI.

关键词： vibrational relaxation hydrogen molecules. B2-Eirene simulation detached plasma

SIMAP500: A novel risk score to identify recipients at higher risk of hepatocellular carcinoma recurrence following liver transplantation

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world journal of Transplantation 2024年第3期14卷 132-143页

作者： Amr Alnagar Nekisa Zakeri Konstantinos Koilias Rosemary E Faulkes Rachel Brown Owen Cain M Thamara P R Perera Keith j Roberts Rebeca Sanabria-Mateos David C Bartlett Yuk Ting Ma Shivan Sivakumar Shishir Shetty Tahir Shah Bobby v M Dasari Department of HBP and Liver Transplantation Surgery Queen Elizabeth HospitalUniversity Hospitals BirminghamBirmingham B152GWUnited Kingdom Centre for Liver Research Institute of Biomedical ResearchBirmingham B152TTUnited Kingdom Department of Hepatology Queen Elizabeth HospitalUniversity Hospitals BirminghamBirmingham B152GWUnited Kingdom Department of Pathology University Hospitals Birmingham NHS Foundation TrustBirmingham B152GWUnited Kingdom Department of Oncology Queen Elizabeth HospitalUniversity Hospitals of BirminghamBirmingham B152GWUnited Kingdom

BACKGROUND Recurrence of hepatocellular carcinoma(HCC)following liver transplantation(LT)has a devastating influence on recipients’survival;however,the risk of recur-rence is not routinely *** stratification is vital with a long LT waiting time,as that could influence the recurrence despite strict listing *** This study aims to identify predictors of recurrence and develop a novel risk pre-diction score to forecast HCC recurrence following *** A retrospective review of LT for HCC recipients at University Hospitals Bir-mingham between july 2011 and February *** and multivariate analyses were performed to identify recurrence predictors,based on which the novel SIMAP500(satellite nodules,increase in size,microvascular invasion,AFP>500,poor differentiation)risk score was *** 234 LTs for HCC were performed with a median follow-up of 5.3 *** developed in 25 patients(10.7%).On univariate analyses,RETREAT score>3,α-fetoprotein(AFP)at listing 100-500 and>500,bridging,increased tumour size between imaging at the listing time and explant histology,increase in the size of viable tumour between listing and explant,presence of satellite nodules,micro-and macrovascular invasion on explant and poor differentiation of tumours were significantly associated with recurrence,based on which,the SIMAP500 risk score is *** SIMAP500 demonstrated an excellent predictive ability(c-index=0.803)and outper-formed the RETREAT score(c-index=0.73).SIMAP500 is indicative of the time to disease *** SIMAP500 risk score identifies the LT recipients at risk of HCC *** stratification allows patient-centric post-transplant surveillance *** validation of the score is recommended.

关键词： Liver transplantation Hepatocellular carcinoma Recurrence Survival

Magnetospheric Boundary Layer Structure and Dynamics as Seen From Cluster and Double Star Measurements

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空间科学学报 2013年第6期33卷 577-603页

作者： Y v Bogdanova C j Owen M w Dunlop M G G T Taylor A N Fazakerley Space Science and Technology Department RALChiltonDidcotOxfordshireOX11 0QXUK Mullard Space Science Laboratory University College LondonHolmbury St.MaryDorkingSurreyRH5 6NTUK Science and Robotic Exploration Directorate ESA/ESTECNoordwijkThe Netherlands

In this review,we discuss the structure and dynamics of the magnetospheric LowLatitude Boundary Layer(LLBL)based on recent results from multi-satellite missions Cluster and Double *** boundary layer,adjacent to the magnetopause on the magnetospheric side,usually consists of a mixture of plasma of magnetospheric and magnetosheath origins,and plays an important role in the transfer of mass and energy from the solar wind into the magnetosphere and subsequent magnetospheric *** southward Interplanetary Magnetic Field(IMF)conditions,this boundary layer is generally considered to be formed as a result of the reconnection process between the IMF and magnetospheric magnetic field lines at the dayside magnetopause,and the structure and plasma properties inside the LLBL can be understood in terms of the time history since the reconnection *** northward IMF conditions,the LLBL is usually thicker,and has more complex structure and *** observations confirm that the LLBL observed at the dayside can be formed by single lobe reconnection,dual lobe reconnection,or by sequential dual lobe reconnection,as well as partially by localized cross-field *** LLBL magnetic topology and plasma signatures inside the different sub-layers formed by these processes are discussed in this *** role of the Kelvin-Helmholtz instability in the formation of the LLBL at the flank magnetopause is also ***,we conclude that the LLBL observed at the flanks can be formed by the combination of processes,(dual)lobe reconnection and plasma mixing due to non-linear Kelvin-Helmholtz waves.

关键词：边界层结构磁层顶双星群集国际货币基金组织等离子体特性测量拓扑结构

The effects of electron irradiation on the optical properties of the organic semiconductor polypyrrole

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journal of Semiconductors 2013年第9期34卷 11-15页

作者： j.v.Thombare M.C.Rath S.H.Han v.j.Fulari Holography and Materials Research Laboratory Department of PhysicsShivaji University Radiation and Photochemistry Division BARC Department of Chemistry Hanyang University

The optical properties of polypyrrole （Ppy） thin films upon 2 Mev electron beam irradiation changes with different doses. The induced changes in the optical properties for Ppy thin films were studied in the visible range 300 to 800 nm at room temperature. The optical band gap of the pristine Ppy was found to be 2.19 cv and it decreases up to 1.97 ev for a 50 kGy dose of 2 Mev electron beam. The refractive index dispersion of the samples obeys the single oscillator model. The obtained results suggest that electron beam irradiation changes the optical parameters of Ppy thin films.

关键词： polypyrrole electron beam irradiation optical band gap