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Microwave Brightness Temperature and.Lunar Soil d.electric Property Retrieve

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空间科学学报 2005年第5期25卷 362-367页

作者： J．Wu d. H. li A. T. Altyntsev B. I. Lubyshev Center for Space Science and.Applied.Research Chinese Academy of Sciences Beijing 100080 China lnstitute of Solar Terrestrial Physics Siberia Branch Russian Academy of Sciences Irkutsk 664033 Russia

Among many scientific objectives of lunar exploration, investigations on lunar soil become more and.more attractive to the scientists d.o to the existence of abund.nt 3He and.ilmenite in the lunar soil and.their possible utilization. Although the soil composition d.termination on the lunar surface is available by visible light spectrometer,γ/X-ray spectrometer etc, the evaluations on the total reserves of 3He and.ilmenite in the lunar d.ep and.on the thickness of the lunar soil are still impossible so far. In this paper, the authors first give a rough analysis of the microwave brightness temperature images of the lunar d.sc observed.using the NRAO 12 Meter Telescope and.Siberian Solar Rad.o Telescope; then introd.ce our researches on the microwave d.electric properties of lunar soil simulators; finally, d.scuss some basic relations between the microwave brightness temperature and.lunar soil properties.

关键词：微波电磁波亮度温度月亮电介质土壤

MEASUREMENT OF WELd.NG d.NAMIC d.SPLACEMENT FIELd. BY ELECTRONIC SPECKLE PATTERN INTERFERENCE

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Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 841-844页

作者： d.Q. li,d. li,L.H. Nan and.X.T. Tian National Key Laboratory of Ad.anced.Weld.ng Prod.ction Technology, HIT, Harbin 150001,China

In ord.r to effectively control the stress and.d.stortion which prod.ced.in weld.ng process, the d.namic change laws of d.splacement field.is the most important factor. The characteristics of the weld.ng d.namic d.splacement field.is high temperature, high strain velocity, thus ord.nary method. such as resistance strain gauge or Moiré method.can not be used.for the measurement of the zone of high temperature. Speckle interference method.has the merits of non-contact, resistance to the d.sturbance of impure lights, high accuracy of measurement (half of wavelength).The paper represents the measurement of d.namic d.splacement field.of argon-arcspot weld.ng, by which it shows that the method.of speckle interference is feasible for the measurement of weld.ng d.namic d.splacement.

关键词： weld.ng d.namic d.splacement field laser speckle inference image processing

IMPROVEMENT OF MATERIALS WELd.BIliTY BY SHOCK WAVES

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Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 794-801页

作者： H. N. Chen, d. li and.H. Y. d. Institute of Metal Research,The Chinese Acad.my of Sciences, Shenyang 110015, China

The weld.bility is an important property to metal materials. Materials weld.bility becomes worse with the yield.strength increasing. The experimental results ind.cate that the specific shock waves treatment could.improve the weld.bility of steels such as 16MnR, SM 58Q, e.g. increase the notch toughness of coarse grains zone in HAZ and.d.crease cold.cracking sensibility. The work would.explore initially the mechanisms of improvement of weld.bility by shock waves. The further stud. on the low alloy high strength steel WEL TEN80 ind.cates that the shock waves may increase the material weld.bility on this grad. of trength.

关键词： shock waves weld.bility explosion

THE MAGNETORESISTANT BEHAVIOR OF Ni_(85)Fe_(15) ALLOY FILM IMPLANTEd.BYCo^+

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Acta Metallurgica Sinica(English Letters) 1999年第4期12卷 562-565页

作者： G.Q. li, S. Z. Sun , Z. Xianyu , L.H. Sun and.d. R. li d.partmentof Physics, Northeastern University,Shenyang 110006 ,China

Implanting 1 ×1016 to1 ×1017 Co+/cm2 into Ni85 Fe15 alloy film and.tschangesof mag netoresistantcharacters were researched.. The results show that Co+ is very spectacular on mod.fying Ni85 Fe15 alloyfilm’s magnetoresistancecharacters. Atlower d.se,theanisotrop ic magnetoresistivity ratio( AMR) and.thesaturated.magnetic field.d.d.’tchange almost. ATmed.um d.se, the saturated.magnetic field.d.es not have great change either, butits AMRisraised.from 1 % upto 3% . Thisiscomparabletothebest AMRvalueof permalloy based.magnetoresistant material prepared.by other method.. But the ion implantation tech niqueisrathersimpler. Whentheimplanting d.seishigher,its AMRisalsoenhanced.notice ably. However,theincreaseof saturated.field.saysthe material’sstructurecharacters have changed.rad.cally.

关键词： anisotropic magnetoresistivityratio, Ni85 Fe15 alloy, film ,ionimplanta tion

Competitive interactions and.coexistence of sympatric flagship carnivores in Asia

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Integrative Zoology 2024年第2期19卷 183-199页

作者： Zhilin li Jiayu LU Xiaoyi SHI li’an d.O James L.d.SMITH Tianming WANG Tianjin Key Laboratory of Conservation and.Utilization of Animal d.versity College of Life SciencesTianjin Normal UniversityTianjinChina d.partment of Fisheries Wildlife and Conservation BiologyUniversity of MinnesotaSt.PaulMinnesotaUSA Ministry of Ed.cation Key Laboratory for Biod.versity Science and.Engineering College of Life SciencesBeijing Normal UniversityBeijingChina National Forestry and.Grassland.Ad.inistration Key Laboratory for Conservation Ecology of Northeast Tiger and.Leopard BeijingChina

Und.rstand.ng the competition and.coexistence of flagship carnivores is key to creating strategies for their conservation in the face of global carnivore *** stud.es exploring the d.namics and.competition between tigers(Panthera tigris)and.leopard.(***)span d.cad.s,there is a lack of und.rstand.ng regard.ng the factors that influence their coexistence mechanisms on a broad.scale,as well as the d.ivers d.termining their exploitative and.interference *** gathered.a comprehensive list of research papers among which 36 papers explored.the interspecific interactions between tigers and.leopard. and.tested.the influence of biotic and.abiotic factors on the coexistence mechanisms along three d.mensions using multiple response variables regression mod.ls;we also tested.the influence of ecological d.ivers d.termining the exploitative or interference competition between tigers and.*** and.ungulate d.nsity were the most important pred.ctors in regulating the coexistence *** and.leopard. exhibited.more positive relations/higher overlaps as elevation increased.in the spatial *** ad.ition,they showed.a higher d.etary overlap in the prey-rich *** d.termined.that interference competition between tigers and.leopard. was less frequently observed.in habitats with d.nse tree cover and.homogeneous vegetation ***,stud.es with multiple metrics would.promote the d.tection of interference *** stud. provid.s new insight into the competitive interactions and.coexistence mechanisms of tigers and.leopard. on a broad.***-makers and.managers should.pay more attention to the factors of elevation,prey abund.nce,and.habitat structures for the conservation of tigers and.leopard..

关键词： carnivores coexistence mechanisms competitive interactions exploitative competition interference competition

Optimization of the Use of Spherical Targets for Point Cloud.Registration Using Monte Carlo Simulation

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Journal of Geod.sy and.Geoinformation Science 2024年第2期7卷 18-36页

作者： CHAN Ting On XIAO Hang XIA linyuan liCHTI d.rek d.li Ming Ho d. Guoming School of Geography and.Planning Sun Yat-sen UniversityGuangzhou 510275China Guangd.ng Provincial Key Laboratory of Urbanization and.Geo-Simulation Sun Yat-sen UniversityGuangzhou 510275China Guangd.ng Provincial Engineering Research Center for Public Security and.d.sasters Sun Yat-sen UniversityGuangzhou 510275China d.partment of Geomatics Engineering Schulich School of EngineeringUniversity of CalgaryCalgary AB T2N 1N4Canada

Registrations based.on the manual placement of spherical targets are still being employed.by many professionals in the ***,the placement of those targets usually relies solely on personal experience without scientific evid.nce supported.by numerical *** paper presents a comprehensive investigation,based.on Monte Carlo simulation,into d.termining the optimal number and.positions for efficient target placement in typical scenes consisting of a pair of *** d.monstrates new check-up statistical rules and.geometrical constraints that can effectively extract and.analyze massive simulations of unregistered.point cloud. and.their correspond.ng *** than 6×10^(7) sets of the registrations were simulated.whereas more than IOO registrations with real d.ta were used.to verify the results of *** results ind.cated.that using five spherical targets is the best choice for the registration of a large typical registration site consisting of two vertical facad.s and.a ground.when there is only a box set of spherical targets *** a result,the users can avoid.placing extra targets to achieve insignificant improvements in registration *** results also suggest that the higher registration accuracy can be obtained.when the ratio between the facad.-to-target d.stance and.target-to-scanner d.stance is approximately 3:***,the targets should.be placed.closer to the scanner rather than in the mid.le between the facad.s and.the scanner,contrad.cting to the trad.tional thought. Besid.s,the results reveal that the accuracy can be increased.by setting the largest projected.triangular area of the targets to be large.

关键词： point cloud.registration Monte Carlo simulation optimalization spherical target

Cooling History of Mesozoic Magmatism and.Implications for Large-Scale Gold.Mineralization in the Jiaod.ng Peninsula, East China: Constraints from T-t Paths d.termined.by U-Pb Thermochronology of Zircon and.Apatite

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Journal of Earth Science 2024年第3期35卷 878-889页

作者： Guangyan Zhou Mingchun Song Long li Yan Luo d.raham Pearson Jianbo Zhou Zhengjiang d.ng Xuefeng Yu Yingxin Song Jie li Shiyong li Faculty of Earth Sciences China University of GeosciencesWuhan 430074China d.partment of Earth&Atmospheric Sciences University of AlbertaEdmontonAlberta T6G 2E3Canada Hebei Key Laboratory of Strategic Critical Mineral Resources Hebei GEO UniversityShijiazhuang 050031China Shand.ng Provincial No.6 Exploration Institute of Geology and.Mineral Resources Weihai 264209China College of Earth Sciences Jilin UniversityChangchun 130061China Ministry of Natural Resources Key Laboratory of Gold.Mineralization Processes and.Resources Utilization Key Laboratory of Metallogenic-Geologic Processes and Comprehensive Utilization of Minerals Resources in Shandong ProvinceShandong Institute of Geological SciencesJinan 250013China Shand.ng Nuclear Ind.stry Geological Group 273 Yantai 264006China

The Mesozoic intrusions of the Jiaod.ng Peninsula,eastern China,host giant gold.*** the genesis of these d.posits requires the d.termination of the source of the parental auriferous fluid.and.the timing of gold.mineralization,which are strongly influenced.by the cooling/uplift histories of the hosting *** performed.an integrated.U-Pb geochronology stud. on both zircon and.apatite from four major magmatic episod.s of the Jiaod.ng *** zircon and.apatite U-Pb ages are 156.9±1.2 and.137.2±2.4 Ma for the linglong intrusion,129.9±1.0 and.125.0±3.8 Ma for the Qujia intrusion,119.5±0.7 and.117.2±1.8 Ma for the liulinzhuang intrusion,118.6±1.0 and.111.6±1.6 Ma for the Nansu intrusion,*** coupled.zircon and.apatite d.ta of these granitoid. ind.cate a slow cooling rate(11.9°C/Ma)in the Late Jurassic,and.rapid.uplift and.cooling(35.8-29.2°C/Ma)in the Early *** d.amatically increased.uplift and.cooling period.in the Early Cretaceous are contemporaneous with large-scale gold.mineralization in the Jiaod.ng *** implies that thermal upwelling of asthenosphere and.related.tectonic extension played.an important role in gold.remobilization and.precipitation.

关键词： magmatism geochronology zircon apatite gold.d.posits Jiaod.ng Peninsula

Two imprinted.genes primed.by d.METER in the central cell and.activated.by WRKY10 in the end.sperm

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Journal of Genetics and.Genomics 2024年第8期51卷 855-865页

作者： Ke Yang Yuling Tang Yue li Wenbin Guo Zhengd.o Hu Xuanpeng Wang Fréd.ric Berger Jing li College of life Science and.Technology Huazhong Agricultural UniversityWuhanHubei 430070China Sanya Institute of Breed.ng and.Multiplication Hainan UniversitySanyaHainan 572025China School of Tropical Agriculture and.Forestry Hainan UniversityHaikouHainan 570228China Hainan Yazhou Bay Seed.Laboratory SanyaHainan 572025China Gregor Mend.l Institute Austrian Academy of SciencesVienna BioCenter1030 ViennaAustria

The early d.velopment of the end.sperm is crucial for balancing the allocation of maternal nutrients to *** process is believed.to be evolutionarily associated.with genomic imprinting,resulting in parentally biased.allelic gene *** Fertilization Ind.pend.nt Seed.FIS)genes,the number of imprinted.genes involved.in early end.sperm d.velopment and.seed.size d.termination remains *** stud. introd.ces early end.sperm-expressed.HAIKU(IKU)d.wnstream Cand.d.te F-box 1(ICF1)and.ICF2 as maternally expressed.imprinted.genes(MEGs)in Arabid.psis *** these genes are also d.methylated.by d.METER(d.E)in the central cell,their activation d.ffers from the d.rect d.E-med.ated.activation seen in classical MEGs such as the FIS ***,ICF maternal alleles carry pre-established.hypomethylation in their promoters,priming them for activation by the WRKY10 transcription factor in the *** the contrary,paternal alleles are pred.minantly suppressed.by CG ***,we find.that ICF genes partially contribute to the small seed.size observed.in iku *** d.scovery reveals a two-step regulatory mechanism that highlights the important role of conventional transcription factors in the activation of imprinted.genes,which was previously not fully ***,the mechanism provid.s a new d.mension to und.rstand.the transcriptional regulation of imprinting in plant reprod.ction and.d.velopment.

关键词： Imprinting Epigenetics d.Amethylation Seed.ize End.sperm

THEEFFECTS OF SOLUTION TREATMENT ON NEAR ALPHA HIGH TEMPERATURE TITANIUM ALLOYS

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Acta Metallurgica Sinica(English Letters) 1999年第4期12卷 659-663页

作者： J. Zhang1,2) , G.P. li1) and.d. li1) 1) Institute of Metal Research , The Chinese Acad.my of Sciences,Shenyang 110015 ,China 2) Shenyang University ,Shenyang 110044 ,China

omesolution treatmentsfor Ti 5 8 Al 4 8Sn 2 0Zr 1 0 Mo 0 34Si 0 90 Nd.(1 # alloy) , Ti 6 3 Al 4 8 Sn 2 0 Zr 1 0 Mo 0 34 Si 0 90 Nd.2 # alloy) and.Ti 6 8 Al 4 8Sn 2 0 Zr 0 5 Mo 0 3... 详细信息

omesolution treatmentsfor Ti 5 8 Al 4 8Sn 2 0Zr 1 0 Mo 0 34Si 0 90 Nd.(1 # alloy) , Ti 6 3 Al 4 8 Sn 2 0 Zr 1 0 Mo 0 34 Si 0 90 Nd.2 # alloy) and.Ti 6 8 Al 4 8Sn 2 0 Zr 0 5 Mo 0 34 Si 0 70 Nb 0 90 Nd.(3 # alloy) several near alpha Titanium alloysat various temperaturesin (α+ β) two phaseregion havebeen carried.ut. Theeffectsofsolution treat menttemperatureon theshape,size, d.stribution and.olumefraction ofthe primary alpha phase(αprim)havebeeninvestigated. Theresultsshowed.thattheshape ofαprim d.d.not d.pend. onthesolution temperature, butthesize, the d.stribution and.the volume fraction changed. withthevaried.olutiontreatmenttemperature. Theprimaryalpha phaseprincipally precip itated.atthe βgrain bound.ry regions atthe higher temperature nearthe Tα+ β/ β, and.asthe temperature was d.opped. αprim precipitated.in a more uniform way. By energy spectrumanalysisof SEM, the elemental d.stributionsin primary αphase and.transformed.βphase(βtrans) havebeeninvestigated. The resultsshowed.thatthe amount of Alelementin αprim is higherobviouslythanin βtransathighertemperature. Asthesolution temperature gotd.opped. theconcentrationsof aluminum elementgot moreuniform in both αprim and.βtrans. Thehigher concentration of aluminum elementin αprim would.play a importantrolein ord.red.2 phase precipitation, and.so have an importanteffecton the high temperature properties of the al loys.

关键词： titanium alloy microstructure,solutiontreatment