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Com.utational design of structured chem.cal products

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Frontiers of Chem.cal Science and Engineering 2021年第5期15卷 1033-1049页

作者： Faheem.m.shtaq Xiang Zhang ka Y.Fung ka m.Ng Departm.nt of Chem.cal and Biological Engineering The Hong Kong University of Science and TechnologyHong KongChina

In chem.cal product design,the aim.is to form.late a product with desired *** and internal product structure are two key drivers of product perform.nce with direct im.a.t on the m.chanical,electrical,and therm.l ***,there is a keen interest in elucidating the dependence of product perform.nce on ingredients,structure,and the m.nufacturing process to form.the *** of product structure,particularly m.crostructure,is an intrinsically com.lex problem.that involves different phases of different physicochem.cal properties,m.ss fraction,m.rphology,size distribution,and ***,com.utational m.thods have em.rged that assist system.tic m.crostructure quantification and *** objective of this paper is to review these com.utational m.thods and to show how these m.thods as well as other developm.nts in product design can work seam.essly in a proposed perform.nce,ingredients,structure,and m.nufacturing process fram.work for the design of structured chem.cal *** begins with the desired target properties and key *** is followed by com.utation for m.crostructure and then selection of processing steps to realize this *** fram.work is illustrated with the design of nanodielectric and die attach adhesive products.

关键词： product design perform.nce ingredients structure m.nufacturing process fram.work structured chem.cal products m.crostructure design

Spatial analysis of vegetation cover response to clim.te trends in Khakassia(South Siberia)

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Journal of m.untain Science 2023年第10期20卷 2869-2884页

作者： Im.Sergei Institute of Natural Sciences and m.them.tics Khakassian State University named after N.F.KatanovAbakan 655000Russia V.N.Sukachev Institute of Forest Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of ScienceKrasnoyarsk 660036Russia Institute of Ecology and Geography Siberian Federal UniversityKrasnoyarsk 660041Russia Institute of Space Research and High Technologies Reshetnev Siberian State University of Science and TechnologyKrasnoyarsk660014Russia

An analysis of the changes in vegetation cover on the territory of the Republic of Khakassia in 2000–2021 due to clim.tic trends was carried out based on the m.DIS *** changes in vegetation cover were estim.ted based on trends in Norm.lized Difference Vegetation Index(NDVI)and Enhanced Vegetation Index(EVI).In general,in the 21st century,an increase in the biom.ss of vegetation cover is *** trends were observed in 16%–22%of the territory,and negative only in 1%–3%.For about 20%of the analyzed territory,a significant influence of clim.te on the changes in vegetation cover was *** m.st pronounced negative im.a.t on vegetation cover was caused by sum.er air and soil tem.eratures,spring tem.erature,and sum.er winds,and the positive im.a.t was caused by sum.er precipitation and soil *** response of the vegetation cover to clim.te was non-uniform.concerning the ***,a significant correlation with the am.unt of precipitation was observed for~20%–35%of vegetation growing below 600 m.above sea level and for less than 5%above this *** negative effect of sum.er tem.eratures on plants prevailed m.inly at an elevation below~1400 m.above sea *** clim.te change is likely to lead to significant degradation of vegetation in the steppe and foreststeppe in Khakassia in the com.ng decades.

关键词： Khakassia South Siberia Vegetation cover Clim.te trends Rem.te sensing m.DIS NDVI EVI Relief

EFFECT OF ARTIFICIAL WEATHERING AND TEm.ERATURE CYCLING ON THE ADHESION STRENGTH OF WATERBORNE ACRYLATE COATING SYSTEm. USED FOR WOODEN WINDOWS

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Journal of Green Building 2020年第1期15卷 3-14页

作者： Šim.nková Kristýna Hýsek Štěpán Oberhofnerová Eliška Pánek m.loš Fidan Hakan Faculty of Forestry and Wood Sciences Czech University of Life Sciences in PragueKamycka 129Prague 16500Czech Republic

The adhesion of coatings to wood is im.ortant for their long-term.*** this study,the adhesion strength of water-based acrylate coatings used for wooden windows after exposure to artificial weathering(AW)and tem.erature cycling(TC)was *** analysis of the adhesion quality of coatings was perform.d via a pull-off test and failure *** 3-layered and 4-layered white and brown acrylate dispersions from.six different producers were com.ared and the effect of coating thickness on adhesion strength was *** adhesion strength values proved to be very *** AW,the adhesion strength and its variability increased for all the *** had no statistically significant effect on the adhesion strength *** coating system. were initially characterized by lower adhesion strength,but after AW and TC,they reached higher adhesion strength values than brown *** overall highest adhesion after AW and TC was recorded for the coatings based on alkyd-acrylate hybrid basis(Producer 3),while the lowest adhesion variability after AW was m.asured for one type of tested acrylate coating(Producer 4).The effect of different layering on adhesion strength was not dem.nstrated in this study.

关键词： acrylate coatings adhesion strength artificial weathering coating thickness pull-off test tem.erature cycling

m.lti-exponential m.del to describe pressure-dependent P-and S-wave velocities and its use to estim.te the crack aspect ratio

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Journal of Rock m.chanics and Geotechnical Engineering 2022年第2期14卷 385-395页

作者： m.hály Dobróka Norbert Péter Szabó Tünde Edit Dobróka m.tyás Krisztián Baracza Departm.nt of Geophysics University of MiskolcMiskolc-Egyetemváros3515Hungary m.A-m. Geoengineering Research Group University of MiskolcMiskolc-Egyetemváros3515Hungary Research Institute of Applied Earth Sciences University of MiskolcMiskolc-Egyetemváros3515Hungary

We present new quantitative m.del describing the pressure dependence of acoustic P-and S-wave *** that a variety of individual m.chanism. or defects(such as cracks,pore collapse and grain crushing)can contribute to the pressure-dependent change of the wave velocity,we order a characteristic pressure to all of them.and allow a series of exponential term. in the description of the(Pand S-waves)velocity-pressure *** estim.te the param.ters of the m.lti-exponential rock physical m.del in inversion procedures using laboratory m.asured P-and S-wave velocity *** is known,the conventional dam.ed least squares m.thod gives acceptable results only when one or two individual m.chanism. are *** the num.er of exponential term. leads to highly nonlinear ill-posed inverse *** to this reason,we develop the spectral inversion m.thod(SIm.in which the velocity am.litudes(the spectral lines in the characteristic pressure spectrum.are only considered as *** characteristic pressures(belonging to the velocity am.litudes)are excluded from.the set of inversion unknowns,instead,they are defined in a set of fixed positions equidistantly distributed in the actual interval of the independent variable(pressure).Through this novel linear inversion m.thod,we estim.te the param.ters of the m.lti-exponential rock physical m.del using laboratory m.asured P-and S-wave velocity *** characteristic pressures are related to the closing pressures of cracks which are described by well-known rock m.chanical relationships depending on the aspect ratio of elliptical *** gives the possibility to estim.te the aspect ratios in term. of the characteristic pressures.

关键词： m.lti-exponential rock physical m.del Spectral inversion m.thod(SIm. Crack aspect ratio Characteristic pressures

Tribonacci Partition Form.las m.dulo m

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Acta m.them.tica Sinica,English Series 2010年第3期26卷 465-476页

作者： Ji■í KLA■ka Institute of m.them.tics Brno University of Technology

Each Tribonacci sequence starting with an arbitrary triple of integers is periodic m.dulo m.for any m.dulus m.〉 1. For a given m. the m.pping between the set S of all m.3 triples of initial values and the set of their coresponding periods define a partition of the set S. In this paper we shall investigate som. basic questions related to these partitions from.the point of view of enum.rative com.inatorics.

关键词： Tribonacci sequence m.dular periodicity partition form.las

New Sesquiterpene Glycosides from.Culture Hairy Roots of Catharanthus roseus

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Chinese Journal of Chem.stry 2007年第11期25卷 1695-1699页

作者： CHUNG, ILL-m.n ALl, m.hd CHUN, Se-Chul LEE, Sun-Joo SAN, ka-Yiu CHRISTIE, A. m. Peebles AHm.D, Ateeque Departm.nt of Applied Life Science Konkuk University Seoul 143-701 South Korea Faculty of Pharm.cy Hamdard University New Delhi 110062 India Departm.nt of Bioengineering Rice University Houston Texas 77005 USA

Two new com.ounds cadin-2-en-1β-ol-1β-D-glucuronopyranoside （1）, guaia-l,7-dien-3β,13-diol-13α-D- glucofuranoside （2） along with three known com.ounds have been isolated from.the culture hairy roots of Catharanthus roseus. Their structures have been elucidated with the help of 500 m.z Nm. using 1D and 2D spectral m.thods： viz： ^1H and ^13C Nm., ^1H-^1H COSY, ^1H-^13C HETCOR and DEPT aided by ELm., FAB-m., HR-FABm. and IR spectroscopy.

关键词： Catharanthus roseus Apocynaceae culture hairy root new constituent

Low-tem.erature synthesis of Fe_(2)(m.O_(4))_(3) nanosheets: A cathode for sodium.ion batteries with kinetics enhancem.nt

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Nano Research 2021年第11期14卷 3977-3987页

作者： Ha Tran Huu N.S.m.Viswanath Ngoc Hung Vu Jong-Won Lee Won Bin im Division of m.terials Science and Engineering Hanyang University222Wangsimni-roSeongdong-guSeoul04763Republic of Korea School of m.terials Science and Engineering Chonnam National University77 Yongbong-roBuk-guGwangju61186Republic of Korea Falcuty of Biotechnology Chemistry and Environmental EngineeringPhenikaa UniversityHanoi10000Vietnam A&A Green Phoenix Group Phenikaa Research and Technology Institute(PRATI)167 Hoang NganHanoi10000Vietnam Departm.nt of Energy Science and Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)333 Techno Jungang-daeroHyeonpung-eupDalseonggunDaegu42988Republic of Korea

Sodium.ion batteries (SIBs) are alternatives to lithium.ion batteries (LIBs), and offer som. significant benefits such as cost reduction and a lower environm.ntal im.a.t;however, to com.ete with LIBs, further research is required to im.rove the perform.nce of SIBs. In this study, an orthorhom.ic Na super ionic conductor structural Fe_(2)(m.O_(4))_(3) nanosheet with am.rphous-crystalline core-shell alignm.nt was synthesized using a facile low-tem.erature water-vapor-assisted solid-state reaction and applied as a cathode m.terial for SIBs. The obtained m.terial has a well-defined three-dim.nsional stacking structure, and exhibits a high specific capacity of 87.8 m.h·g^(−1) at a current density of 1 C = 91 m.·g^(−1) after 1,000 cycles, which is due to the considerable contribution of extra surface-related reaction such as the pseudo-capacitive process. This m.terial shows significantly im.roved cycling and rated behavior as well as enhanced perform.nce under high- and low-tem.erature conditions, as com.ared to the sam. m.terials prepared by the conventional high-tem.erature solid-state reaction. This enhancem.nt is explained by the unique m.rphology in com.ination with the im.roved kinetics of the electrochem.cal reaction due to its lower charge transfer resistance and higher sodium.ion conductivity.

关键词： low-tem.erature synthesis cathode sodium.ion batteries kinetics Na+super ionic conductor(NASICON)

Optim.l Design of Splitters Attached to Turbo Blower Im.eller by RSm

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Journal of Therm.l Science 2012年第3期21卷 215-222页

作者： Choon-m.n Jang ka-Ram.Choi Environm.ntal Engineering Research Division Korea Institute of Construction Technology

This paper describes the optim.zation of the im.eller having splitters for a turbo *** design variables,chord of splitter and pitch of splitter,are introduced to enhance the blower *** pressure and ef-ficiency are selected as an object function,and the optim.zation of the blower im.eller is perform.d by a response surface m.thod (RSm..Three-dim.nsional Navier-Stokes equations are introduced to analyze the internal flow of the blower and to find the value of the object function for each *** the shape optim.zation of the splitters attached to the im.eller in the turbo blower,pressure and efficiency at the design flow condition are suc-cessively increased by 5.9 percent and 17.9 percent respectively based on the reference *** higher blower efficiency obtained by optim.zation of im.eller having splitters is m.inly caused by reducing the num.er of im.peller blades and optim.l design of splitters in the blade passage while pressure increase keeps alm.st the sam. with the reference *** the object function of pressure,pressure increase is obtained at the design and off-design conditions while efficiency keeps higher com.ared to the reference *** enhancem.nt of blow-er perform.nce is due to the reduction of reverse and circulation flows in the blade passage.

关键词： Turbo Blower Splitter Num.rical Sim.lation Optim.l Design Pressure Response Surface m.thod

Results of the influenza virus surveillance in wild birds in Western part of m.ngolia

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Asian Pacific Journal of Tropical m.dicine 2010年第2期3卷 90-93页

作者： m.rchenko V Yu Alekseev A Yu Tserennorov D Yurlov AK Susloparov Im.Sharshov ka Ilyinykh FA Zolotykh SI Abm.d D Otgonbaatar D Shestopalov Am Federal State Research Institution State Research Center of Virology and Biotechnology VectorKoltsovoNovosibirsk RegionRussia National Centre for Diseases with Natural Foci UlaanbaatarMongolia Institute of System.tic and Ecology of Anim.ls Siberian BranchRussian Academy of ScienceNovosibirskRussia National Centre for Infectious Diseases UlaanbaatarMongolia

Objective:To present results of virological study of wild birds inhabiting Western m.ngolia. m.thods:Over a period of 2003-2008,we isolated 13 influenza A viruses:H1N1,H3N6, H13N8 and H4N6 *** did not isolate any H5N1 subtype,that still cause epizooty in wild birds and ***:We revealed taxonom.c and ecological heterogeneity of the birds involved in m.intenance of circulation of influenza viruses in the given *** viruses were isolated from.birds of 6 orders;am.ng them.there are species preferring water and sem.-aquatic biotopes,one species preferring dry plain region,and also one species which can inhabit both dry and water ***:Representatives of all m.in orders of Western m.ngolia avifauna are involved in support of influenza A virus circulation,highly pathogenic H5N1 influenza viruses were registered in m.ngolia thus it’s necessary to continue perm.nent influenza virus surveillance in wild birds’ populations.

关键词： Influenza A virus m.ngolia Wild birds