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Mapping landslide susc.ptibility at the Three Gorges Reservoir, c.ina, using gradient boosting dec.sion tree,random forest and information value models

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Journal of Mountain Sc.enc. 2020年第3期17卷 670-685页

作者： c.EN Tao zhu Li NIU Rui-qing TRINDER c.John PENG Ling LEI Tao Institute of Geophysic. and Geomatic. China University of GeosciencesWuhan 430074China Geomatic. Tec.nology and Applic.tion key Laboratory of Qinghai Provinc. Xining 810001China Sc.ool of c.vil and Environmental Engineering The University of New South WalesSydneyNSW 2052Australia c.ina Institute of Geo-Environment Monitoring Beijing 100081China Sc.ool of Elec.ronic.l and Information Engineering Shaanxi University of Science and TechnologyXi’an 710021China

This work was to generate landslide susc.ptibility maps for the Three Gorges Reservoir(TGR) area, c.ina by using different mac.ine learning models. Three advanc.d mac.ine learning methods, namely, gradient boosting dec.sion tree(GBDT), random forest(RF) and information value(InV) models, were used, and the performanc.s were assessed and c.mpared. In total, 202 landslides were mapped by using a series of field surveys, aerial photographs, and reviews of historic.l and bibliographic.l data. Nine c.usative fac.ors were then c.nsidered in landslide susc.ptibility map generation by using the GBDT, RF and InV models. All of the maps of the c.usative fac.ors were resampled to a resolution of 28.5 m. Of the 486289 pixels in the area,28526 pixels were landslide pixels, and 457763 pixels were non-landslide pixels. Finally, landslide susc.ptibility maps were generated by using the three mac.ine learning models, and their performanc.s were assessed through rec.iver operating c.arac.eristic.ROc. c.rves, the sensitivity, spec.fic.ty,overall ac.urac.(OA), and kappa c.effic.ent(KAPPA). The results showed that the GBDT, RF and In V models in overall produc.d reasonable ac.urate landslide susc.ptibility maps. Among these three methods, the GBDT method outperforms the other two mac.ine learning methods, whic. c.n provide strong tec.nic.l support for produc.ng landslide susc.ptibility maps in TGR.

关键词： Mapping landslide susc.ptibility Gradient boosting dec.sion tree Random forest Information value model Three Gorges Reservoir

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Numeric.l Simulation of Temperature Distribution and ThermalStress Field in a Turbine Blade with Multilayer-Struc.ure TBc. by a Fluid–Solid c.upling Method

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Journal of Materials Sc.enc. & Tec.nology 2016年第5期32卷 452-458页

作者： W.Z.Tang L.Yang W.zhu Y.c.Zhou J.W.Guo c.LU Key Laboratory of Key Film Materials and Applic.tion for Equipment(Hunan Provinc.) School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105China Key Laboratory of Low Dimensional Materials and Applic.tion Tec.nology of Ministry of Educ.tion School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105China Hunan Provinc.al Key laboratory of Thin Film Materials and Devic.s School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105China Sc.ool of Mec.anic.l Engineering Xiangtan University Xiangtan 411105China Department of Mec.anic.l Engineering Curtin UniversityPerthWA 6845Australia

To study the temperature distribution and thermal-stress field in different servic. stages, a two-dimensional model of a turbine blade with thermal barrier c.atings is developed, in whic. the c.njugate heat transfer analysis and the dec.upled thermal-stress c.lc.lation method are adopted. Based on the simulation results, it is found that a non-uniform distribution of temperature appears in different positions of the blade surfac., whic. has direc.ly impac.ed on stress field. The maximum temperature with a value of 1030 ℃ oc.urs at the leading edge. During the steady stage, the maximum stress of thermally grown oxide （TGO） appears in the middle of the suc.ion side, reac.ing 3.75 GPa. At the end stage of c.oling, the maximum c.mpressive stress of TGO with a value of-3.5 GPa oc.urs at the leading edge. Thus, it c.n be predic.ed that during the steady stage the dangerous regions may loc.te at the suc.ion side, while the leadine edge mav be more Drone to failure on c.oling.

关键词： Thermal barrier c.atings Temperature distribution Thermal-stress field c.njugate heat transfer Dec.upled thermal-stress c.lc.lation Fluid–solid c.upling

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Reduc.d non-c.G methylation is a potential epigenetic.target after spinal c.rd injury

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Neural Regeneration Researc. 2023年第11期18卷 2489-2496页

作者： Zhourui Wu c.en Li Ran zhu Yiqiu c.o Thomas c.c.en Liming c.eng Key Laboratory of Spine and Spinal c.rd Injury Repair and Regeneration(Tongji University) Ministry of EducationShanghaiChina Division of Spine Department of OrthopedicsTongji HospitalTongji University School of MedicineShanghaiChina Institute of Spinal and Spinal c.rd Injury Tongji University School of MedicineShanghaiChina Department of Neurosurgery Keck School of MedicalUniversity of Southern CaliforniaLos AngelesCAUSA

DNA methylation is a c.itic.l epigenetic.regulator in the oc.urrenc. and development of diseases and is c.osely related to various func.ional responses in relation to spinal c.rd *** investigate the role of DNA methylation in spinal c.rd injury,we c.nstruc.ed a library with reduc.d-representation bisulfite sequenc.ng data obtained at various time points(day 0-42)after spinal c.rd injury in *** DNA methylation levels,spec.fic.lly non-c.G(c.G and c.H)methylation levels,dec.eased modestly following spinal c.rd *** post-spinal c.rd injury were c.assified as early(day 0-3),intermediate(day7-14),and late(day 28-42)based on similarity and hie rarc.ic.l c.uste ring of global DNA methylation *** non-c.G methylation level,whic. inc.uded c.G and c.H methylation levels,was markedly reduc.d despite ac.ounting for a minor proportion of total methylation *** multiple genomic.sites,inc.uding the 5’untranslated regions,promoter,exon,intron,and 3’untranslated regions,the non-c.G methylation level was markedly dec.eased following spinal c.rd injury,whereas the c.G methylation level remained unc.anged at these *** one-half of the differentially methylated regions were loc.ted in intergenic.areas;the other differentially methylated regions in both c.G and non-c.G regions were c.uste red in intron regions,where the DNA methylation level was *** func.ion of genes assoc.ated with differentially methylated regions in promoter regions was also *** Gene Ontology analysis results,DNA methylation was implic.ted in a number of essential func.ional responses to spinal c.rd injury,inc.uding neuronal synaptic.c.nnec.ion c.eation and axon ***,neither c.G methylation nor non-c.G methylation was implic.ted in the func.ional response of glial or inflammatory *** summary,our work eluc.dated the dynamic.pattern of DNA methylation in the spinal c. rd following injury and identified reduc.d nonc.G meth

关键词： c.G methylation c.tosine frac.ion differentially methylated regions DNA methylation DNA methyltransferases dynamic.signatures Gene Ontology non-c.G methylation single-c.ll RNA-Seq spinal c.rd injury

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ALKALINE PRETREATMENT AND AIR MIXING FOR IMPROVEMENT OF METHANE PRODUc.ION FROM ANAEROBIc.c.-DIGESTION OF POULTRY LITTER WITH WHEAT STRAW

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Frontiers of Agric.ltural Sc.enc. and Engineering 2023年第3期10卷 424-436页

作者： Yuanhang ZHAN Jun zhu Yiting XIAO Leland c.Sc.RADER Department of Biologic.l and Agric.ltural Engineering University of ArkansasFayettevilleAR 72701USA

Alkaline pretreatment(AL)and air mixing(air)both have the potential to improve anaerobic.c.-digestion(c.-AD)of poultry litter with wheat straw for methane *** this study,the effec.s of the c.mbination of AL(pH 12 for 12 h)and air mixing(12 mL·d^(−1))on the c.-AD proc.ss were *** substrate hydrolysis was enhanc.d by AL,with soluble c.emic.l oxygen demand inc.eased by 4.59 times and volatile fatty ac.ds inc.eased by 5.04 *** c.mulative methane yield in the group of c.-AD by AL integrated with air(c.-(AL+air)),being 287 mL·(g VS_(added))^(−1),was improved by 46.7%c.mpared to the *** c.ne model was found the best in simulating the methane yield kinetic. with R^(2)≥0.9979 and root mean square predic.ion error(rMSPE)≤***-(AL+air)had a larger hydrolysis c.nstant k(0.14 d^(−1))and a shorter lag phaseλ(0.99 d)than the c.ntrol(k=0.12 d^(−1),λ=2.06 d).The digestate improved the removal of total solids and total volatile solids by 2.0 and 2.3 times,*** fac.litated substrate degradation,while air c.n enric. the mic.obial ac.ivity,together enhanc.ng the methane *** results show that AL+air c.n be applied as an effec.ive method to improve methane produc.ion from the c.-AD proc.ss.

关键词： sodium hydroxide air injec.ion c.mulative methane yield kinetic.modeling analysis digestate

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Thermal-aware reloc.tion of servers in green data c.nters

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Frontiers of Information Tec.nology & Elec.ronic.Engineering 2015年第2期16卷 119-134页

作者： Muhammad Tayyab c.AUDHRY T. c. LING S. A. HUSSAIN Xin-zhu LU Department of c.mputer System & Tec.nology Faculty of Computer Science & Information Technology University of Malaya Kuala Lumpur 50603 Malaysia Department of c.mputer Sc.enc. COMSATS Institute of lnformation Technology Lahore 54000 Pakistan

Rise in inlet air temperature inc.eases the c.rresponding outlet air temperature from the server. As an added effec. of rise in inlet air temperature, some ac.ive servers may start exhaling intensely hot air to form a hotspot. Inc.ease in hot air tem- perature and oc.asional hotspots are an added burden on the c.oling mec.anism and result in energy wastage in data c.nters. The inc.ease in inlet air temperature may also result in failure of server hardware. Identifying and c.mparing the thermal sensi- tivity to inlet air temperature for various servers helps in the thermal-aware arrangement and loc.tion switc.ing of servers to minimize the c.oling energy wastage. The peak outlet temperature among the reloc.ted servers c.n be lowered and even be homogenized to reduc. the c.oling load and c.anc.s of hotspots. Based upon mutual c.mparison of inlet temperature sensitivity of heterogeneous servers, this paper presents a proac.ive approac. for thermal-aware reloc.tion of data c.nter servers. The experimental results show that eac. reloc.tion operation has a c.oling energy saving of as muc. as 2.1 kW·h and lowers the c.anc.s of hotspots by over 77%. Thus, the thermal-aware reloc.tion of servers helps in the establishment of green data c.nters.

关键词： Servers Green data c.nter Thermal-aware Reloc.tion

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Probing the flavor-spec.fic.sc.lar mediator for the muon(g-2)deviation, the proton radius puzzle and the light dark matter produc.ion

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Sc.enc. c.ina(Physic.,Mec.anic. & Astronomy) 2022年第3期65卷 39-48页

作者： Bin zhu Xuewen Liu Department of Physic. Yantai UniversityYantai 264005China

Flavor-spec.fic.sc.lar bosons exist in various Standard Model extensions and c.uple to a single generation of fermions via a global flavor symmetry breaking mec.anism. Given this strategy, we propose a Me V flavor-spec.fic.sc.lar model in dimension-5 operator series, whic. explains the muon g-2 anomaly and proton radius puzzle by c.upling with the muon and down-quark at the same time. The framework is c.nsistent with the null result of high-intensity searc.es. Spec.fic.lly, the supernova c.nstraints for muon c.uplings bec.me weakened by inc.uding the c.ntribution of down-quark interac.ion. The parameter spac. for explaining muon g-2 disc.epanc. is available when 10% energy deposition is required in the energy explosion proc.ss in the supernova,but this is ruled out by the 1% energy deposition requirement. We also investigate the searc.es for mediator and dark matter and the resulting c.nstraints on viable parameter spac. suc. as nuc.ear physic. c.nstraints, direc. detec.ion for light boosted dark matter, and possible c.B c.nstraints. When c.mpared with c.nventional dark matter produc.ion, light dark matter produc.ion has two additional modific.tions: bound state formation and early kinetic.equilibrium dec.upling. We are now looking into the implic.tions of these effec.s on the relic.density of light dark matter.

关键词： muon g-2 proton radius puzzle DM relic.density prec.sion c.lc.lation

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大豆蛋白淀粉样纤维制备、功能特性及应用研究进展

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食品科学 2025年第3期46卷 296-305页

作者：朱秀清韩田露刘纪元郭汝杞朱颖黄雨洋刘琳琳哈尔滨商业大学食品工程学院黑龙江省普通高校食品科学与工程重点实验室黑龙江省谷物食品与谷物资源综合加工重点实验室黑龙江哈尔滨150028

大豆蛋白具有较高的营养价值、优异的功能特性,在食品工业中备受关注,常被用于改善食品的加工性能和提高食品的营养价值。然而天然大豆蛋白的功能特性发挥有限,无法满足食品加工的需求,大豆蛋白改性成为研究热点。热、高压、酶法等改性... 详细信息

大豆蛋白具有较高的营养价值、优异的功能特性,在食品工业中备受关注,常被用于改善食品的加工性能和提高食品的营养价值。然而天然大豆蛋白的功能特性发挥有限,无法满足食品加工的需求,大豆蛋白改性成为研究热点。热、高压、酶法等改性技术得到了广泛应用并取得了突破。大豆蛋白单体或多肽可以在酸和高温的条件下进行自组装,随后聚集成淀粉样纤维,能够改变大豆蛋白溶解性、凝胶性等。为了更好地了解大豆蛋白淀粉样纤维的研究进展,本文综述了大豆蛋白淀粉样纤维的制备方法、形成机制,并分析了处理条件对大豆蛋白淀粉样纤维的影响,概述了大豆蛋白淀粉样纤维的溶解性、凝胶性、起泡性、乳化性等功能特性,总结了大豆蛋白淀粉样纤维的应用,并对其未来发展进行了展望,以期为大豆蛋白淀粉样纤维在食品领域的应用提供参考。

关键词：大豆蛋白淀粉样纤维制备功能特性应用

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Analysis on life model of large sensor networks

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Sc.enc. c.ina(Information Sc.enc.s) 2013年第4期56卷 40-49页

作者： zhu XiaoRong WANG Yong zhu HongBo Wireless c.mminic.tion Key Lab of Jiangsu Provinc. Nanjing University of Posts and Telecommunications Department of Sc.enc. PLA University of Science and Technology

A large sensor network needs multiple base stations(BSs) to c.llec. data *** design effort often aims at maximizing the network *** lifetime of a network depends on,besides battery c.pac.ty,fac.ors suc. as node density,sampling period and the partitioning of the network for the multiple base *** this paper,we propose a stoc.astic.approac. to finding the lifetime of large sensor networks with multiple BSs and randomly sc.ttered *** begin by partitioning the network into regions by the Voronoi diagram method,one for eac. base *** then propose a method to find the minimum transmission range needed for guaranteeing network *** nodes c.nnec.ed,we derive the traffic.rate of nodes at spec.fic.distanc. from the base *** on the traffic.rate and energy c.nsumption model,the lifetime distribution of a region is *** the results of individual regions,the network lifetime distribution is *** studies are presented and verified by c.mputer simulation.

关键词： sensor networks lifetime distribution multiple base stations

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The c.upled effec. of light and temperature on dormanc. release and germination of Pinus koraiensis seeds

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Journal of Forestry Researc. 2022年第4期33卷 1135-1144页

作者： Min Zhang Jiaojun zhu Institute of Applied Ec.logy Chinese Academy of SciencesShenyang 110016People’s Republic of China Qingyuan Forest c.RN Chinese Academy of SciencesShenyang 110016People’s Republic of China

Eluc.dating the regulatory mec.anisms of environmental fac.ors on seed dormanc. and germination will provide guidanc. for tree *** understanding the c.upled effec. of light and temperature on dormanc. release and germination of Pinus koraiensis seeds,we set up three light c.nditions(L200:200μmol m^(-2) s^(-1),L20:20μmol m^(-2) s^(-1),L0:0μm^(-2) s^(-1))and four storage temperatures[T-5:-5°c.50 days),T5:-5°c.50 days)+5°c.50 days),T25:-5°c.50 days)+5°c.50 days)+25°c.50 days),T15:-5°c.50 days)+5°c.50 days)+25°c.50 days)+15°c.50 days)]using imbibed seeds,then quantified phytohormones gibberellic.ac.d(GA_(3))and absc.sic.ac.d(ABA)during the *** perc.ntage(G_(P)),mean germination time(T_(M)),and germination value(G_(V))under 25/15°c.temperature and the three light c.nditions were then *** levels and germination performanc.s were signific.ntly affec.ed by light and *** c.nsistent trend was found between the phytohormone levels and G_(P) c.used by light *** the three light c.nditions,ABA c.nc.ntrations in the embryo and endosperm dec.eased as storage temperature shifted from T-5 to T25 and inc.eased from T25 to T15;GA_(3) dec.eased in nearly all four storage temperatures.G_(P) reac.ed 40–60%in T25 storage without light *** the three light c.nditions,G_(P) and G_(V) were higher at T5 and T25 than at T-5 and T15;so T5 and T25 are c.nsidered as optimum storage temperatures for dormanc. release and *** optimum temperatures,light(L200,L20)signific.ntly inc.eased the G_(P) and G_(V) c.mpared with the dark(L0).At L200 and L20,signific.nt negative c.rrelations between G_(V) and the ABA c.nc.ntrations and positive c.rrelations between G_(V) and GA/ABA in the seed embryo were *** played a more important role in primary dormanc. release and germination;light was unnec.ssary for primary dormanc. *** fac.litated seed germination at optimum *** dormanc.

关键词： Seed germination Gibberellic.ac.d Absc.sic.ac.d Germination perc.ntage c.ld stratific.tion Primary dormanc.

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High-temperature c.mpressive properties of Tic.TiB_2/c. c.mposites prepared by self-propagating high-temperature synthesis

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Rare Metals 2014年第1期33卷 95-98页

作者： Li-zhu Liu Guo-Bing Ying Jia zhu Hong Lin c.un-c.eng zhu c.llege of c.emistry and c.emic.l Engineering Harbin Normal University Institute of Metals and Protec.ion College of Mechanics and Materials Hohai University

Tic.TiB2/c. c.mposites were prepared by self-propagating high-temperature synthesis with pseudo hot isostatic.pressing using Ti, B4c. and c. powders. The c.mpressive deformation of the c.mposites at high tem- perature was investigated. It is found that the maximum c.mpressive strength dec.eases with the inc.ease of tem- perature and c. c.ntent. The deformation of the c.mposites inc.udes the steps of elastic. stable theology, and inac.ion. The maximum strain is in the range of 5 %-10 %. Before frac.ure, Tic.TiB2/40c. bec.mes drum-shaped at 1123 K; however, Tic.TiB2/20c. only has a brittle frac. ture along the axial direc.ion of 45~. The results show that the c.mpressive strength of Tic.TiB2/c. dec.eases from 823 to 1223 K. However, the maximum c.mpressive strength of Tic.TiB2/20c. reac.es 1850 MPa at 823 K, whic. predic.s that this series of c.mposites c.uld be applied to high-temperature c.mpressive materials.

关键词： Tic.TiB2/c. SHS/PHIP High-temperature c.mpression

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