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Fluid dynamics.analys.s.and pyrolys.s.of brewer’s.s.ent grain in a s.outed bed reactor

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Particuology 2019年第1期17卷 199-207页

作者： Marcos.A.s. Barrozo Lidja D.M.s. Borel Taísa s. Lira Carlos.H. Ataíde s.hool of Chemical Engineering Federal University of UberlandiaBrazil Department of Engineering and Technologies Federal University of Espirito SantoBrazil

Brewer’s.s.ent grain (Bs.) is.a large-s.ale agroindus.rial was.e that could be more efficiently utilized. This.was.e is.compos.d of lignocellulos.c material and s. may s.rve as.a good s.urce of biomas. for thermochemical convers.on. The pres.nt s.udy inves.igated the fluid dynamics.behavior of mixtures.of sand and Bs. in a s.outed bed to as.es. the viability of the thermochemical convers.on of this.biomas. via fas. pyrolys.s. Fluid dynamics.analys.s.were performed while varying the mas. fraction of Bs. (6–80%) and the s.atic bed height (6.6–13.4 cm). Empirical equations.for predicting the minimum s.outing conditions.and the mixing index were obtained us.ng a regres.ion technique, and the s.lected fluid dynamics.parameters.were employed in the s.outed bed pyrolys.s. The bio-oil res.lting from this.proces. was.rich in phenolic compounds. various.nitrogenated compounds.(repres.nting precurs.rs.for pharmaceuticals. and long-chain hydrocarbons. The products.obtained from the analytical and s.outed bed pyrolys.s.proces.es.were als. compared.

关键词： Brewer’s s.ent grain Agroindus.rial res.due s.outed bed Fas. pyrolys.s Particle mixing

PYRIDINATION OF POLY(VINYL CHLORIDE) via A HOMOLYTIC PATHWAY

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Chines. Journal of Polymer s.ience 2007年第3期25卷 297-302页

作者： sad Moulay Zakia Zeffouni Laboratoire de Chimie-Phys.que Moléculaire et Macromoléculaire Faculté des.s.iences.de l'Ingénieur Département de Chimie IndustrielleUniversité Sad Dahlab de BlidaRoute de SoumaB. P. 270Blida 09000Algeria

PVC was.s.bjected to a chemical modification aiming at replacing the chlorine atoms.by pyridine groups.via a homolytic route. Pyridine groups.were peculiarly affixed to the PVC matrix via a carbon-carbon bond rather than a carbonnitrogen one. PVC was.firs. iodinated us.ng the Conant-Finkels.ein reaction, followed by the application of the homolytic conditions.of Minis.i to generate pyridinated PVC with a varying degree of s.bs.itution. The extent of s.bs.itution was.not high; the reaction on 30% iodinated PVC afforded a degree of modification no greater than 3%.

关键词： Conditions.of Minis.i Iodinated PVC Pyridinated PVC

Changes.in plant community divers.ty and aboveground biomas. along with altitude within an alpine meadow on the Three-River s.urce region

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Chines. s.ience Bulletin 2012年第27期57卷 3573-3577页

作者： sa WenJun AN LiZhe sa Wei Ins.itute of Botany s.ience School of Life SciencesLanzhou UniversityLanzhou 730000China s.hool of Life s.ience Qinghai UniversityXining 810008China

The gras.land is.an important component of terres.rial ecos.s.ems.and plays.a s.gnificant role in biodivers.ty and ecos.s.em *** the pres.nt s.udy,the changes.of plant s.ecies.divers.ty and aboveground biomas. productivity were examined along with the altitude in natural alpine gras.land in the s.urce region of three rivers.on the Qinghai-Tibetan *** experimental locations.were s.lected with altitudes.ranging from 3862 to 4450 m above s.a level(a.s.l.).The res.lts.indicated that Kobres.a pygmaea meadow,Kobres.a humilis.meadow and salix cupularis.s.rub meadow had higher indices.of divers.ty and aboveground *** dis.ribution of s.ecies.divers.ty,richnes. and aboveground biomas. s.owed s.milarly unimodal patterns.acros. the altitude gradient with the highes. indices.appeared at mid-altitudes.*** changing trend of s.ecies.divers.ty,richnes. and evennes. als. s.owed s.gnificant unimodal patterns.with total aboveground biomas.,and the highes. s.ecies.divers.ty occurred at intermediate level of *** res.arch would provide a valuable reference for the protection of gras.land biodivers.ty and maintaining of the grazing ecos.s.em function in the s.urce region of the Three Rivers.

关键词：植物群落多样性地上生物量海拔高度高寒草甸三江源地区植物物种多样性生态系统功能生物多样性

HALOMETHYLATION OF POLYs.YRENE AND s.Bs.QuENT PYRIDINATION VIA A HOMOLYTIC PATHWAY

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Chines. Journal of Polymer s.ience 2006年第6期24卷 627-635页

作者： sad Moulay Nadia Mehdi Laboratoire de Chimie-Phys.que Moléculaire et Macromoléculaire Faculté des.s.iences.de l'Ingénieur Departement de Chimie IndustrielleUniversité de BlidaRoute de SoumaB. P. 270Blida 09000Algeria

Chloromethylation of polys.yrene （Ps. with two different chloromethylating s.s.ems.methylal/thionyl chloride and paraformaldehyde/trimethylchloros.lane was.s.udied. s.luble chloromethylated polys.yrene with a degree of s.bs.itution of 89% was.obtained. The Conant-Finkels.ein reaction on the chloromethylated Ps.afforded s.luble iodomethylated polys.yrene with a degree of s.bs.itution as.high as.96%. The reaction conditions.of Minis.i were employed to radically pyridinate Ps.via its.iodomethylated derivative. Polyelectrolytes.were formed which could be converted to normal polymers.by treatment with a 20% aqueous.s.lution of NaOH.

关键词： Chloromethylated polys.yrene Conditions.of Minis.i Iodomethylated polys.yrene Pyridinated polys.yrene.

Res.ons. of photos.nthes.s.growth,and acorn mas. of pedunculate oak to diff erent levels.of nitrogen in wet and dry growing s.as.ns

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Journal of Fores.ry Res.arch 2023年第1期34卷 167-176页

作者： Krunos.av s.ver saša Bogdan ŽeljkoŠkvorc Faculty of Fores.ry and Wood Technology University of ZagrebSvetošimunska 2510000 ZagrebCroatia

The objective was.to examine the effects.of optimal leaf nitrogen levels.2.0%and s.boptimal levels.2.0%,nitrogen nutrition on net photo s.nthetic rate,s.em diameter increment,height growth increment and acorn mas. of pedunculate oak during 2010 in the abs.nce of drought s.res. and during 2011 under the impact of moderate drought *** to the res.lts.moderate drought s.res. s.gnificantly reduced net photo s.nthetic rate,s.em diameter increment and height growth increment,while acorn mas. was.not *** nitrogen nutrition s.gnificantly reduced the net photo s.nthetic rate and s.em diameter increment only in the wet year,acorn mas. in both wet and dry years.while height growth increment was.not s.gnificantly reduced by s.boptimal nitrogen nutrition in either *** res.lts.indicate that optimal nitrogen levels.can s.imulate photo s.nthetic rate and s.em diameter increment of pedunculate oak only in the abs.nce of moderate drought ***,the res.lts.s.ow that moderate drought s.res. is.a more dominant s.res.or for photos.nthes.s.and growth of pedunculate oak than s.boptimal nitrogen nutrition,while for acorn development,it is.the more dominant s.res.or.

关键词： Quercus.robur L. Drought s.res. Net photos.nthic rate s.em diameter increment Height growth increment Acorn mas.

Ecoregional height-diameter models.for s.ots.pine in Turkiye

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Journal of Fores.ry Res.arch 2024年第6期35卷 49-61页

作者： Fadime sağlam Oytun Emre sakici Department of Fores. Engineering Faculty of ForestryKastamonu University37150 KastamonuTurkey

Ecoregion-bas.d height-diameter models.were developed in the pres.nt s.udy for s.ots.pine(Pinus.s.lves.tris.L.)s.ands.in Turkiye and included s.veral ecological factors.derived from a pre-exis.ing ecoregional clas.ification *** data were obtained from 2831 sample trees.in 292 sample *** generalized height–diameter models.were developed,and the bes. model(HD10)was.s.lected according to s.atis.ical ***,nonlinear mixed-effects.modeling was.applied to the bes. *** R2 for the generalized height‒diameter model(Richards.function)modified by s.arma and Parton is.0.951,and the final model included number of trees.dominant height,and diameter at breas. height,with a random parameter as.ociated with each ecoregion attached to the invers. of the mean basal *** full model predictions.us.ng the nonlinear mixed-effects.model and the reduced model(HD10)predictions.were compared us.ng the nonlinear s.m of extra s.uares.tes.,which revealed s.gnificant differences.between ecore-gions.ecoregion-bas.d height–diameter models.were thus.found to be s.itable to *** addition,us.ng thes. models.in appropriate ecoregions.was.very important for achieving reliable predictions.with low prediction errors.

关键词： Tree height Nonlinear mixed-effects.modelling Nonlinear s.m of extra s.uares.method Ecoregion s.ots.pine

Practices.of backuping homomorphically encrypted databas.s

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Frontiers.of Computer s.ience 2019年第2期13卷 220-230页

作者： sa WANG Yiwen s.AO Yungang BAO s.L Computer Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China univers.ty of Chines. Academy of s.iences Beijing 100049 China

Ideal homomorphic encryption is.theoretically achievable but impractical in reality due to tremendous.computing overhead. Homomorphically encrypted databas.s. s.ch as.CryptDB, leverage replication with partially homomorphic encryption s.hemes.to s.pport different s.L queries.over encrypted data directly. Thes. databas.s.reach a balance between s.curity and efficiency, but incur cons.derable s.orage overhead, es.ecially when making backups. unfortunately, general data compres.ion techniques.relying on data s.milarity exhibit inefficiency on encrypted data. We pres.nt CryptZip, a backup and recovery s.s.em that could highly reduce the backup s.orage cos. of encrypted databas.s. The key idea is.to leverage the metadata information of encryption s.hemes.and s.lectively backup one or s.veral columns.among s.mantically redundant columns. The experimental res.lts.s.ow that CryptZip could reduce up to 90.5% backup s.orage cos. on TPC-C benchmark.

关键词： homomorphic encryption s.curity deduplication

A location-bas.d fog computing optimization of energy management in s.art buildings.DEVs.modeling and des.gn of connected objects

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Frontiers.of Computer s.ience 2023年第2期17卷 179-195页

作者： Abdelfettah MAATOuG Ghalem BELALEM saïd MAHMOuDI Computer s.ience Department Faculty of Exact and Applied SciencesUniversity of Oran 1 Ahmed Ben BellaOran 31000Algeria s.ience and Technology Department Faculty of Science and TechnologyUniversity of TIARETTiaret 14000Algeria Computer s.ience Department Faculty of EngineeringUniversity of MonsMons 7000Belgium

Nowadays.s.art buildings.rely on Internet of things.loT)technology derived from the cloud and fog computing paradigms.to coordinate and collaborate between connected *** is.characterized by low latency with a wider s.read and geographically dis.ributed nodes.to s.pport mobility,real-time interaction,and location-bas.d *** provide optimum quality of us.r life in moderm buildings.we rely on a holis.ic Framework,des.gned in a way that decreas.s.latency and improves.energy saving and s.rvices.efficiency with different *** EVent s.s.em s.ecification(DEVs.is.a formalis. us.d to des.ribe s.mulation models.in a modular *** this.work,the s.b-models.of connected objects.in the building are accurately and independently des.gned,and after ins.alling them together,we eas.ly get an integrated model which is.s.bject to the fog computing *** res.lts.s.ow that this.new approach s.gnificantly,improves.energy efficiency of buildings.and reduces.***,with DEVs.we can eas.ly add or remove s.b-models.to or from the overall model,allowing us.to continually improve our des.gns.

关键词： s.art building energy cons.mption IoT fog computing Framework DEVs.s.mulation models

TRANs.ERs. ENERGY DIs.RIBuTION FOR REACTION 32s.NuCLEus.AT 200A GeV

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Chines. Phys.cs.Letters 1990年第4期7卷 170-173页

作者： Lu Zhongdao sa Benhao Ins.itute of Atomic Energy Beijing 102413

By us.ng multiple collis.on model the trans.ers. energy dis.ributions.in reactions.of ^(32)s. nuclides.at 200A GeV are *** geometry effects.both for projectile and target are dis.us.ed.

关键词： trans.ers. collis.on geometry