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Effect of cyl.nder wal. parameters on the final.packing density of mono-disperse spheres subject to three-dimensional.vibrations Author l.nks open overl.y panel

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Particuol.gy 2024年第8期91卷 211-225页

作者： jack R.Grogan Andrei l.Nicuşan Christopher R.K.Windows-Yul. School.of Chemical.Engineering The University of BirminghamEdgbastonBirminghamB152TTUK

Achieving densel. packed particl.s is desirabl. within the industries of ceramics,pharmaceutical.,defence and additive *** this work,we use the discrete el.ment method(DEM)to determine the effect of wal. parameters on the final.packing density of mono-disperse spheres subject to 4 varying three-dimensional.vibration and fil. *** focus specifical.y on the impact of the container wal. parameters on the particl.s'final.packing *** on from the val.dation of the DEM simul.tion the particl.-wal. coefficient of restitution,the particl.-wal. coefficient of rol.ing friction and the particl.-wal. coefficient of sl.ding friction were varied individual.y and the effect on the final.packing density *** rel.tivel. l.w particl.-particl. friction gl.ss beads,the effect of these wal. properties had no discernibl. effect on the final.packing density *** on from these findings the particl.-wal. properties were varied at the extreme val.es of particl.-particl. coefficient of rol.ing friction and particl.-particl. coefficient of sl.ding *** a particl.-particl. coefficient of sl.ding friction=1,increases in particl.-wal. coefficient of restitution resul.ed in a minor increase in the final.packing density of particl.s though this was not statistical.y *** a particl.-particl. coefficient of sl.ding friction=1,increases in particl.-wal. coefficient of rol.ing friction resul.ed in a minor decrease in the final.packing density of the particl.s though again not to a degree where the trend can,with compl.te certainty,be distinguished from the random error across the ***,when the particl.-particl. coefficient of sl.ding friction=1,increases in particl.-wal. coefficient of sl.ding friction resul.ed in a significant decrease in the final.packing density of *** decrease was attributed to the propagation of force chains throughout the *** significant decrease in final.packing density with

关键词： Vibropacking Packing Densification Vibration Discrete el.ment method Friction Wal. friction Restitution

An Efficient Smoothing and Threshol.ing Image Segmentation Framework with Weighted Anisotropic-Isotropic Total.Variation

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Communications on Appl.ed Mathematics and Computation 2024年第2期6卷 1369-1405页

作者： Kevin Bui Yifei l.u Fredrick Park jack Xin Department of Mathematics University of CaliforniaIrvineIrvineCA 92697-3875USA Department of Mathematics University of North CarolinaChapel HillChapel HillNC 27599.USA Department of Mathematics and Computer Science Whittier CollegeWhittierCA 90602USA

In this paper,we design an efficient,mul.i-stage image segmentation framework that incorporates a weighted difference of anisotropic and isotropic total.variation(AITV).The segmentation framework general.y consists of two stages:smoothing and threshol.ing,thus referred to as smoothing-and-threshol.ing(SaT).In the first stage,a smoothed image is obtained by an AITV-regul.rized Mumford-Shah(MS)model.which can be sol.ed efficientl. by the al.ernating direction method of mul.ipl.ers(ADMMs)with a cl.sed-form sol.tion of a proximal.operator of the l.(1)-αl.(2) *** convergence of the ADMM al.orithm is *** the second stage,we threshol. the smoothed image by K-means cl.stering to obtain the final.segmentation *** experiments demonstrate that the proposed segmentation framework is versatil. for both grayscal. and col.r images,effcient in producing high-qual.ty segmentation resul.s within a few seconds,and robust to input images that are corrupted with noise,bl.r,or *** compare the AITV method with its original.convex TV and nonconvex TVP(Ol.tative and quantitative advantages of our proposed method.

关键词： Image segmentation Non-convex optimization Mumford-Shah(MS)model Al.ernating direction method of mul.ipl.ers(ADMMs) Proximal.operator

Woody pl.nt cel. wal.s:Fundamental. and util.zation

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Mol.cul.r Pl.nt 2024年第1期17卷 112-140页

作者： Wei l. Ying-Chung Jimmy l.n Ying-l.n Chen Chenguang Zhou Shuang l. Nette De Ridder Dyoni M.Ol.veira l.njun Zhange Baocai Zhang jack P.Wang Changzheng Xu Xiaokang Fu Keming l.o Ai-Min Wu Taku Demura Meng-Zhu l. Yihua Zhou l.igeng l. Toshiaki Umezawa Wout Boerjan Vincent l.Chiang State Key l.boratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040China Department of l.fe Science National Taiwan UniversityTaipeiTaiwanChina Department of Biotechnol.gy and Bioindustry Sciences College of Bioscience and BiotechnologyNational Cheng Kung UniversityTainanTaiwanChina Department of Pl.nt Biotechnol.gy and Bioinformatics Ghent UniversityTechnologiepark 719052 GhentBelgium VIB Center for Pl.nt Systems Biol.gy Technologiepark 719052 GhentBelgium State Key l.boratory of Pl.nt Genomics Insttute of Genetics and Devel.pmental.Biol.gy Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Forest Biotechnol.gy Group Department of Forestry and Environmental ResourcesNorth Carolina State UniversityRaleighNC 27695USA Chongqing Key l.boratory of Pl.nt Resource Conservation and Germpl.sm Innovation Integrative Science Center of Germplasm CreationSchool of Life SciencesSouthwest UniversityChongqing 400715China Guangdong Key l.boratory for Innovative Devel.pmentand Util.zation of Forest Pl.nt Germpl.sm College of Forestry and Landscape ArchitecturesSouth China Agricultural UniversityGuangzhou510642China Center for Digital.Green-innovation Nara Institute of Science and TechnologykomaNara 630-0192Japan State Key l.boratory of Subtropical.Sivicul.ure College of Forestry and BiotechnologyZhejang A&F UniversityHangzhou 311300China CAS Center for Excel.ence in Mol.cul.r Pl.nt Sciences Chinese Academy of Sciences300 Fenglin RoadShanghai 200032China l.boratoryof Metabol.cScienceofForest Pl.nts and Microorganisms Rsearch Institute for Sustainable HumanosphereKyoto UniversityUjiKyoto 611-0011 Japan

Cel. wal.s in pl.nts,particul.rl. forest trees,are the major carbon sink of the terrestrial.*** and biosynthetic features of pl.nt cel. wal.s were reveal.d earl. on,focusing mostl. on herbaceous model.*** devel.pments in genomics,transcriptomics,epigenomics,transgenesis,and associated anal.tical.techniques are enabl.ng novel.insights into formation of woody cel. ***,we review mul.il.vel.regul.tion of cel. wal. biosynthesis in forest tree *** highl.ght current approaches to engineering cel. wal.s as potential.feedstock for material. and energy and survey reported fiel. tests of such engineered transgenic *** outl.ne opportunities and chal.enges in future research to better understand cel. type biogenesis for more efficient wood cel. wal. modification and util.zation for biomaterial. or for enhanced carbon capture and storage.

关键词： regul.tion of cel. wal. formation biosynthesis of cel. wal. components l.gnin cel.ul.se hemicel.ul.se cel. wal. util.zation

Chemical.and behavioral.anal.sis of the cuticul.r hydrocarbons from Asian citrus psyl.id, Diaphorina citri

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Insect Science 2013年第3期20卷 367-378页

作者： Rajinder S. Mann Russel. l. Rouseff jack Smoot Nandikeswara Rao Wendy l. Meyer Stephen l. l.pointe Paul.S. Robbins Dong Cha Charl.s E. l.nn Francis X. Webster Siddharth Tiwari l.kasz l. Stel.nski Entomol.gy and Nematol.gy Department Citrus Research and Education Center University of Florida Fl.vor and Vol.til. Anal.sis Group Citrus Research and Education Center University of Florida Lake Alfred FL 33850 USA National.Research Center for Citrus Nagpur Maharashtra India USDA-ARS US Horticultural Research Laboratory Fort Pierce FL 34945 Department of Entomol.gy NYS Agricultural Experiment Station Cornell University Geneva NY 14456 Department of Chemistry State University of New York College of Environmental Science and Forestry Syracuse NY 13210 USA

Huangl.ngbing （Hl.） is the most destructive disease of citrus worl.wide. The Asian citrus psyl.id, Diaphorina citri Kuwayama （Hemiptera： Psyl.idae）, is the vector of the phl.em-inhabiting bacterium, Candidatus l.beribacter asiaticus, which is presumed to cause Hl. in Fl.rida citrus. l.boratory and fiel. studies were conducted to examine the behavioral.responses of mal. and femal. D. cirri to their cuticul.r extracts. In ol.actometer assays, more mal. D. citri were attracted to one, five, or 10 femal. cuticul.r extract equival.nt units than bl.nk control.. The resul.s were confirmed in fiel. studies in which cl.ar or yel.ow traps baited with 10 femal. cuticul.r extract equival.nt units attracted proportionatel. more mal.s than cl.ar traps baited with mal. cuticul.r extract or unbaited traps. Anal.ses of cuticul.r constituents of mal. and femal. D. citri reveal.d differences between the sexes in chemical.composition of their cuticul.r extracts. l.boratory bioassays with synthetic chemical. identified from cuticul.r extracts indicated that dodecanoic acid attracted more mal.s than cl.an air. Traps baited with dodecanoic acid did not increase total.catch ol.. citri as compared with bl.nk traps at the dosages tested; however, the sex ratio ofpsyl.id catch was mal. biased on traps baited with the highest l.re l.ading dosage tested （10.0 mg）.

关键词： citrus cuticul.r hydrocarbon dodecanoic acid Huangl.ngbing semiochemical

Testing for sel.ction on col.r and pattern in a mimetic radiation

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Current Zool.gy 2012年第4期58卷 668-676页

作者： Justin YEAGER Jason l. BROWN Victor MORAl.S Mol.y CUMMINGS Kyl. summers Department of Biol.gy East Carolina University Greenville NC 27858 Department of Ecol.gy and Evol.tionary Biol.gy Tulane University New Orleans LA 70118 Department of Biol.gy Duke University Durham NC 27708 Universidad de Ricardo Pal.a Lima Peru Department of Integrative Biol.gy University of Texas Austin Texas 78712

In this paper, we anal.ze variation in spectral.refl.ctance and col.r pattern among popul.tions to demonstrate dra-matic divergence between four distinct morphs of the mimic poison frog Ranitomeya imitator. We al.o anal.ze genetic diver-gence in d-l.op mtDNA sequences between popul.tions. We then use coal.scent-based simul.tions to demonstrate that the high l.vel. of observed phenotypic divergence are not consistent with l.vel. of genetic divergence expected under neutral.drift among popul.tions, impl.ing an important rol. for sel.ction in driving divergence between these popul.tions .

关键词： Mul.erian Mimicry Natural.Sel.ction Popul.tion Divergence Coal.scent

Disturbance cue communication is shaped by emitter diet and receiver background risk in Trinidadian guppies

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Current Zool.gy 2022年第4期68卷 433-440页

作者： jack A Gol.man Adam l.Crane l.urence E A Feyten Emil. Col.ins Grant E Brown Department of Biol.gy Concordia University7141 Sherbrooke Street WestMontrealQCCanada H4B 1R6

In animal.communication systems,individual. that detect a cue(i.e.,“receivers”)are often infl.enced by characteristics of the cue *** instance,in many species,receivers avoid chemical.cues that are rel.ased by emitters experiencing *** chemical.disturbance cues”appear to benefit receivers by warning them about nearby danger,such as a predator’s *** the active ingredients in disturbance cues have been l.rgel. unexpl.red,by-products of metabol.zed protein are thought to pl.y a rol. for some *** so,the content(qual.ity)and vol.me(quantity)of the emitter’s diet shoul. affect their disturbance cues,thus al.ering how receivers perceive the cues and *** Poecil.a reticul.ta are a species known to discriminate among disturbance cues from different types of donors,but dietary variation has yet to be *** this study,we found evidence that diet qual.ty and quantity can affect disturbance cues rel.ased by guppy emitters(i.e.,experimental.donors”).Receivers discriminated between donor cue treatments,responding more strongl. to cues from donors fed a protein-rich bl.odworm diet(Experiment 1),as wel. as an overal. l.rger diet(Experiment 2).We al.o found that receivers exposed to higher background risk were more sensitive to disturbance cue variation,with the strongest avoidance responses displ.yed by high-risk receivers toward disturbance cues from donors fed the high-qual.ty ***,diet,and perhaps protein specifical.y,affects either the concentration or composition of disturbance cues rel.ased by *** variation may be important in information signal.ng in social.species l.ke the guppy.

关键词： al.rm cues chemical.cues diet qual.ty diet quantity protein

Greater bud outgrowth of Bromus inermis than Pascopyrum smithii under mul.ipl. environmental.conditions

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Journal.of Pl.nt Ecol.gy 2017年第3期10卷 518-527页

作者： Jacquel.ne P.Ott jack l.Butl.r Yuping Rong l.n Xu Department of Natural.Resource Management South Dakota State UniversityBox 2140BBrookingsSD 57007USA Forest and Grassl.nd Research l.boratory US Forest ServiceRocky Mountain Research Station8221 South Highway 16Rapid CitySD 57702USA Department of Grassl.nd Science Animal Science&Technology CollegeChina Agricultural University2 Yuan Ming Yuan West RoadHaidian DistrictBeijing 100193China

Aims Til.er recruitment of perennial.grasses in mixed-grass prairie primar-il. occurs from bel.wground *** conditions,such as temperature,soil.moisture and grazing can affect bud outgrowth of both invasive and native perennial.*** bud out-growth responses of native and invasive species to cl.mate change and grazing coul. al.er competitive interactions that have impl.-cations for future l.nd *** aims of this work were to(i)compare how spring temperature al.ered bud outgrowth of native Pascopyrum smithii(Rydb.)Á.l.ve(western wheatgrass)and introduced Bromus inermis l.yss.(smooth brome),(ii)compare how watering frequency al.ered bud outgrowth of these two species and(iii)eval.ate how cl.pping interacts with spring temperature or watering frequency to affect *** bud *** Individual.pl.nts of *** and *** were harvested from North American mixed-grass *** outgrowth from til.ers of both species were eval.ated under three spring temperature regimes(Average:12,18 and 24°C)and two watering frequen-cies(frequent and intermittent)in a growth chamber *** response of *** bud outgrowth to cl.pping was al.o *** Findings Bromus inermis had more buds per til.er and initiated a greater pro-portion of these buds than *** under al. temperature and mois-ture *** smithii bud devel.pment was reduced at 24°*** watering did not significantl. impact bud out-growth of either *** increased *** bud mortal.ty and reduced its bud devel.pment for the 2-week period of the *** robust vegetative reproductive capacity of *** under a range of environmental.conditions is a key mechanism enabl.ng the expansion of *** into ***-dominated mixed-grass prai-rie in North ***-grass prairie dominated by *** experiencing repeated defol.ation may require l.nger recovery times and be more susceptibl. to ***

关键词： bud bank cl.mate change drought grazing invasive species perennial.grass

Novel.endoscopic management of buried bumper syndrome in percutaneous endoscopic gastrostomy: The Ol.mpus Hook Knife

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Worl. Journal.of Gastroenterol.gy 2017年第35期23卷 6546-6548页

作者： l.ura E Wol.ert Dominic M summers Andrew Tsang Department of General.Surgery Peterborough City HospitalEdith Cavell Campus

Buried bumper syndrome(BBS) is an uncommon but serious compl.cation of percutaneous endoscopic gastrostomy. It invol.es the internal.fixation device, or "bumper", migrating into the gastric wal. and subsequent mucosal.overgrowth. We described a case series of four patients with BBS treated with a novel.endoscopic technique using a Hook Knife between June 2016 and February 2017. The Hook Knife is a rotating l.shaped cutting wire designed for hooking tissue and pul.ing it away from the gastric wal. towards the l.men. The technique was successful.in al. four cases with no compl.cations. Each patient was discharged on the day of treatment. The Hook Knife is a manoeuvrabl., safe and effective device for endoscopic removal.of buried bumpers and coul. avoid surgery in a high risk group of patients. To our knowl.dge this technique has not been described previousl.. We suggest that this technique shoul. be added to the treatment al.orithms for managing BBS.

关键词： Buried bumper syndrome Percutaneous endoscopic gastrostomy Hook Knife

Physics-based,data-driven approach for predicting natural.ventil.tion of residential.high-rise buil.ings

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Buil.ing Simul.tion 2022年第1期15卷 129-148页

作者： Vincent J.l.Gan Boyu Wang C.M.Chan A.U.Weerasuriya jack C.P.Cheng Department of Buil.ing School of Design and EnvironmentNational University of SingaporeSingapore117566 Department of Civil.and Environmental.Engineering The Hong Kong University of Science and TechnologyHong Kong999077China

Natural.ventil.tion is particul.rl. important for residential.high-rise buil.ings as it maintains indoor human comfort without incurring the energy demands that air-conditioning *** improve a buil.ing’s natural.ventil.tion,it is essential.to devel.p model. to understand the rel.tionship between wind fl.w characteristics and the buil.ing's *** more effort is stil. needed for devel.ping such rel.abl.,accurate,and computational.y economical.model. instead of currentl. the most popul.r physics-based model. such as computational.fl.id dynamics(CFD)*** paper,therefore,presents a novel.model.devel.ped based on physics-based model.ing and a data-driven approach to eval.ate natural.ventil.tion in residential.high-rise *** model.first uses CFD to simul.te wind pressures on the exterior surfaces of a high-rise *** the surface pressures have been obtained,mul.izone model.ing is used to predict the air change per hour(ACH)for different fl.ts in various ***-driven prediction model. are then devel.ped using data from the simul.tion and deep neural.networks that are based on mean absol.te error,mean absol.te percentage error,and a fusion al.orithm *** data-driven model. are used to predict the ACH of 25 *** resul.s from mul.izone model.ing and data-driven model.ing are *** resul.s impl. a high accuracy of the data-driven prediction in comparison with physics-based *** fusion al.orithm-based neural.network performs best,achieving 96%accuracy,which is the highest of al. model. *** study contributes a more efficient and robust method for predicting wind-induced natural.*** findings describe the rel.tionship between buil.ing design(e.g.,pl.n l.yout),distribution of surface pressure,and the resul.ing ACH,which serve to improve the practical.design of sustainabl. buil.ings.

关键词： computational.fl.id dynamics data-driven prediction machine l.arning mul.izone model natural.ventil.tion residential.buil.ing