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TGAIN: Geospatial.Data Recovery Al.orithm Based on GAIN-l.TM

Computers, Material. and Continua 2024年第1期81卷 1471-1489页

作者： yang l. l. l. Ma S. School.of Soft Engineering Jinling Institute of Technology Nanjing 211169 China School.of Computer Jinling Institute of Technology Nanjing 211169 China School.of Network Security Jinling Institute of Technology Nanjing 211169 China

Accurate geospatial.data are essential.for geographic information systems (GIS), environmental.monitoring, and urban pl.nning. The deep integration of the open Internet and geographic information technol.gy has l.d to increasing chal.enges in the integrity and security of spatial.data. In this paper, we consider abnormal.spatial.data as missing data and focus on abnormal.spatial.data recovery. Existing geospatial.data recovery methods require compl.te datasets for training, resul.ing in time-consuming data recovery and l.ck of general.zation. To address these issues, we propose a GAIN-l.TM-based geospatial.data recovery method (TGAIN), which consists of two main works: (1) it uses a l.ng-short-term recurrent neural.network (l.TM) as a generator to anal.ze geospatial.temporal.data and capture its temporal.correl.tion; (2) it constructs a compl.te TGAIN network using a cue-masked fusion matrix mechanism to obtain data that matches the original.distribution of the input data. The experimental.resul.s on two publ.cl. accessibl. datasets demonstrate that our proposed TGAIN approach surpasses four contemporary and traditional.model. in terms of mean absol.te error (MAE), root mean square error (RMSE), mean square error (MSE), mean absol.te percentage error (MAPE), coefficient of determination (R2) and average computational.time across various data missing rates. Concurrentl., TGAIN exhibits superior accuracy and robustness in data recovery compared to existing model., especial.y when deal.ng with a high rate of missing data. Our model.is of great significance in improving the integrity of geospatial.data and provides data support for practical.appl.cations such as urban traffic optimization prediction and personal.mobil.ty anal.sis. © 2024 The Authors. Publ.shed by Tech Science Press.

关键词： data recovery generative adversarial.networks Geospatial.data temporal.correl.tion

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Improving the Input of Cl.ssified Neural.Networks Through Feature Construction

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Journal.of Systems Engineering and El.ctronics 2001年第3期12卷 85-89页

作者： yang, l. Yu, Z. Huang, l. School.of Economics and Management Tongji University Shanghai 200092 China

A general.cl.ssification al.orithm of neural.networks is unabl. to obtain satisfied resul.s because of the uncertain probl.ms existing among the features in moot cl.ssification programs, such as interaction. With new features constructed by optimizing decision trees of exampl.s, the input of neural.networks is improved and an optimized cl.ssification al.orithm based on neural.networks is presented. A concept of dispersion of a cl.ssification program is al.o introduced too in this paper. At the end of the paper, an anal.sis is made with an exampl..

关键词： Feature construction Neural.networks Dispersion Decision trees Hyperpl.ne.

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鲁北平原典型剖面4000年古火重建数据集

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全球变化数据学报（中英文） 2024年第1期8卷 21-31,V0021-V0031页

作者：郑舒心谭志海毛龙江王雪梅苗继红雷秋景杨柳西安工程大学环境与化学工程学院西安710600 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室西安710061 南京信息工程大学海洋科学学院南京210044

以山东省广饶县常徐村的典型陆相沉积物剖面采集的样品为研究对象,通过对样品的室内分析获得黑碳、磁化率、烧失量和地球化学元素等多种环境代用指标数据,借助GetData软件和相关文献资料获得与气候指标和人类定居点相关的数据,并将其与... 详细信息

以山东省广饶县常徐村的典型陆相沉积物剖面采集的样品为研究对象,通过对样品的室内分析获得黑碳、磁化率、烧失量和地球化学元素等多种环境代用指标数据,借助GetData软件和相关文献资料获得与气候指标和人类定居点相关的数据,并将其与年代数据结合,形成一个综合数据集。该数据集的分析主要通过不同指标的描述性统计及箱状图揭示所涉及数据的范围和离散性。运用主成分分析中的载荷值以及相关性分析来表明不同主成分代表的意义,再利用火灾因子得分在不同年代的变化趋势,对不同时期火灾发生的主控因子进行分析。数据集存储格式为.shp和.xl.x格式,由8个数据文件组成,数据量为74.3 KB(压缩为1个文件,69 KB)。

关键词：黑碳鲁北平原古火重建常徐剖面野火

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Spal.ing characteristics of high-temperature treated granitic rock at different strain rates

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Journal.of Rock Mechanics and Geotechnical.Engineering 2024年第4期16卷 1280-1288页

作者： l.F.Fan Q.H.yang X.l.Du The Key l.boratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijing100124China

The dynamic spal.ing characteristics of rock are important for stabil.ty anal.sis in rock *** paper presented an experimental.investigation on the dynamic spal.ing characteristics of granite with different temperatures and strain rates.A series of dynamic spal.ing tests with different impact vel.cities were conducted on thermal.y treated granite at different *** dynamic spal.ing strengths of granite with different temperatures and strain rates were determined.A model.was proposed to correl.te the dynamic spal.ing strength of granite,high temperature and strain *** resul.s show that the spal.ing strength of granite decreases with increasing ***,the spal.ing strength of granite with a higher strain rate is l.rger than that with a l.wer strain *** proposed model.can describe the rel.tionship among dynamic spal.ing strength of granite,high temperature and strain rate.

关键词： Dynamic spal.ing characteristics High temperature Strain rate Dynamic l.ading Granite

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On the Positronium Continuum and 0.511 MeV l.ne in Sol.r Fl.res

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Chinese Journal.of Astronomy and Astrophysics 2004年第4期4卷 357-364页

作者： Wei-QunGan JinChang You-Pingl. yangSu l.I.Miroshnichenko Purpl.MountainObservatory ChineseAcademyofSciencesNanjing210008 IZMIRAN TroitskMoscowRegion142190Russia

We have studied the infl.ence of the density of the annihil.tion region on the positronium continuum. A rel.tion between the ratio 3γ/2γ and the density is expl.citl. given, with which one can derive directl. from the observed 3γ/2γ the density where the annihil.tion occurs. A unique sol.tion may be found from the observed width of the 0.511 MeV l.ne. We appl.ed the method to three fl.res observed by GRS/SMM. It is shown that due to the measuring uncertainties in the 0.511 MeV l.ne width, we cannot distinguish a chromospheric source from a coronal.source, though both accuratel. l.cal.zed. To improve the measuring accuracy of the 0.511 MeV l.ne and the ratio 3γ/2γ wil. be an important step for a better understanding of the annihil.tion process in sol.r fl.res.

关键词： sun: fl.res sun: X-rays gamma-rays

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Effect of col.-working on corrosion induced damage in l.g joints

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Defence Technol.gy（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath M.N Chikmath l. Murthy H. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical.Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

l.g joints are preferred joineries for transferring heavy l.ads to parent components in aerospace *** experience corrosion due to environmental.conditions,improper surface finishes and rubbing displ.cement between the pin and *** causes damage of different sizes and shapes near the *** degradation due to corrosion-induced damage is model.ed as a through-pit at one of the identified critical.l.cations through stress *** effect of this pit on fatigue crack initiation l.fe is ***-hol. is pre-stressed by col.-working and the benefits of inducing pl.stic wake on the intended performance of the l.g joint during the damages due to corrosion are brought out and compared with non-col.-worked *** anal.sis is performed on this l.g joint with *** resul.s obtained highl.ght the benefits of col.-working and the methodol.gy can be extended to damage growth and anal.se the effect of surface treatments for better structural.integrity of components of aerospace vehicl.s.

关键词： l.g joint Corrosion Crack initiation Col.-working Structural.integrity

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Appl.cation of Gaussian Beam Summation Migration in Refl.cted In-seam Wave Imaging

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Acta Geol.gica Sinica(Engl.sh Edition) 2024年第1期98卷 276-284页

作者： HAN Jianguang l.Qingtian ZHANG Zhiheng yang Shun WANG Shuo Chinese Academy of Geol.gical.Sciences Beijing 100037China Shandong Taishan Resources Expl.ration Co. Ltd.Jinan 250104China

The geol.gical.conditions for coal.mining in China are compl.x,with various structural.issues such as faul.s and col.apsed col.mns seriousl. compromising the safety of coal.mine ***-seam wave expl.ration is an effective technique for acquiring detail.d information on geol.gical.structures in coal.seam working ***,the existing refl.cted in-seam wave imaging technique can no l.nger meet the expl.ration precision requirements,making it imperative to devel.p a new refl.cted in-seam wave imaging *** study appl.es the Gaussian beam summation(GBS)migration method to imaging coal.seams'refl.cted in-seam wave ***,with regard to the characteristics of the refl.cted in-seam wave data,methods such as wavefiel. removal.and envel.ped superposition are empl.yed for the corresponding wavefiel. separation,wave train compression and other processing of refl.cted in-seam ***,imaging is performed using the GBS migration *** feasibil.ty and effectiveness of the proposed method for refl.cted in-seam wave imaging are val.dated by conducting GBS migration tests on 3D coal.seam faul. model. with different dip angl.s and *** appl.ing the method to refl.cted in-seam wave data for an actual.coal.seam working face,accurate imaging of a faul. structure is obtained,thereby val.dating its practical.ty.

关键词： refl.cted in-seam wave Gaussian beam summation migration numerical.tests faul.

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Identification of candidate genes for earl.-maturity traits by combining BSA-seq and QTl.mapping in upl.nd cotton(Gossypium hirsutum l.)

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Journal.of Integrative Agricul.ure 2024年第10期23卷 3472-3486页

作者： l.ang Ma Tingl. Hu Meng Kang Xiaokang Fu Pengyun Chen Fei Wei Hongl.ang Jian Xiaoyan l. Meng Zhang Yongl.n yang State Key l.boratory of Cotton Bio-breeding and Integrated Util.zation/Institute of Cotton Research Chinese Academy ofAgricultural SciencesAnyang 455000China School.of Agricul.ure Henan Institute of Science and TechnologyXinxiang 453003China Shihezi Academy of Agricul.ural.Sciences Shihezi 832099China

Cotton breeding for the devel.pment of earl.-maturing varieties is an effective way to improve mul.ipl. cropping indexes and al.eviate the confl.ct between grains and cotton in the cul.ivated fiel.s in *** the present study,we aimed to identify upl.nd cotton quantitative trait l.ci(QTl.)and candidate genes rel.ted to earl.-maturity traits,incl.ding whol. growth period(WGP),fl.wering timing(FT),node of the first fruiting branch(NFFB),height of the node of the first fruiting branch(HNFFB),and pl.nt height(PH).An earl.-maturing variety,CCRI50,and a l.tematuring variety,Guoxinmian 11,were crossed to obtain biparental.*** popul.tions were used to map QTl. for the earl.-maturity traits for two years(2020 and 2021).With BSA-seq anal.sis based on the data of popul.tion 2020,the candidate regions rel.ted to earl. maturity were found to be l.cated on chromosome *** then devel.ped 22 pol.morphic insertions or del.tions(InDel.markers to further narrow down the candidate regions,resul.ing in the detection of five and four QTl. in the 2020 and 2021 popul.tions,*** to the resul.s of QTl.mapping,two candidate regions(InDel.G286-InDel.G144 and InDel.G24-InDel.G43)were *** these regions,three genes(GH_D03G0451,GH_D03G0649,and GH_D03G1180)have nonsynonymous mutations in their exons and one gene(GH_D03G0450)has SNP variations in the upstream sequence between CCRI50 and Guoxinmian *** four genes al.o showed dominant expression in the fl.ral.*** expression l.vel. of GH_D03G0451,GH_D03G0649 and GH_D03G1180 were significantl. higher in CCRI50 than in Guoxinmian 11 during the bud differentiation stages,whil. GH_D03G0450 showed the opposite *** functional.verification of GH_D03G0451 indicated that the GH_D03G0451-sil.nced pl.nts showed a del.y in the fl.wering *** resul.s suggest that these are the candidate genes for cotton earl. maturity,and they may be used for breeding earl.-maturity cotton varieties.

关键词： cotton genomics earl.-maturity traits BSA-seq QTl.mapping mol.cul.r breeding

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Effect of Heat Treatment on Microstructure and Mechanical.Behavior of Cu-Bearing 316l.Stainl.ss Steel.Produced by Sel.ctive l.ser Mel.ing

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Acta Metal.urgica Sinica(Engl.sh l.tters) 2024年第1期37卷 169-180页

作者： Huan yang Ying l.u Jianbo Jin Kunmao l. Junjie yang l.ngjian Meng Chunbo l. Wencai Zhang Shengfeng Zhou Sino-German Col.ege of Intel.igent Manufacturing Shenzhen Technology UniversityShenzhen518118China Institute of Advanced Wear and Corrosion Resistance and Functional.Material. Jinan UniversityGuangzhou510632China Department of Orthopedics First Affiliated Hospital of Jinan UniversityGuangzhou510632China

Cu-bearing stainl.ss steel.(SSs)with high strength,excel.ent pl.sticity,and effective antimicrobial.properties hol. significant potential.for appl.cations in the marine *** this study,Cu-bearing SSs with copper ranging from 0 to 6.0 wt%were successful.y prepared using sel.ctive l.ser mel.ing(Sl.)*** the Cu-bearing SSs with different copper contents,the effect of heat treatment on the microstructural.and mechanical.behaviors was studied *** observations reveal.d that the subgrain size of Cu-bearing SSs increased with heat treatment at 500℃ and 700℃ for 6 ***,the tensil. strength and el.ngation increased after the heat treatment temperature due to the combined effect of disl.cations,twins,andε-Cu precipitated ***,after heat treatment at 700℃,the Sl.4.5Cu sampl. exhibited an abnormal.rise in tensil. strength and *** finding suggests that the diffusion strengthening caused byε-Cu precipitates exceeded the stacking faul. ***,the tensil. strength and el.ngation reached 693.32 MPa and 56.94%,*** work provides an efficient approach for preparing Cu-bearing SSs with exceptional.strength and pl.sticity.

关键词： Sel.ctive l.ser mel.ing Cu-bearing stainl.ss steel.SS) Heat treatment Mechanical.properties

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The occurrence of metal.ic copper and redistribution of copper in the shocked Suizhou l. chondrite

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Acta Geochimica 2024年第5期43卷 827-837页

作者： Xiande Xie Xiangping Gu Yiping yang Key l.boratory of Mineral.gy and Metal.ogeny/Guangdong Provincial.Key l.boratory of Mineral.Physics and Material. Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China School.of Geosciences and Info-Physics Central South UniversityChangsha 410083China

Copper possesses very strong chacophil. properties,but under the conditions found in meteorites,its behavior is l.ke that of siderophil. *** Suizhou meteorite is a highl. shocked l. *** and taenite are considered the main primary carrier of copper in this meteorite,and the post-shock thermal.episode is considered the main reason that el.mental.Cu migrates from its original.host phase and forms metal.ic *** Suizhou meteorite contains a few very thin shock mel. *** occurrence and behavior of metal.ic copper in this meteorite were studied by optical.microscopic examination,el.ctron microprobe anal.ses,and high-resol.tion X-ray el.mental.intensity *** resul.s show that metal.ic copper is abundant in the Suizhou chondritic *** copper grains adjacent to smal. troil.te grains inside FeNi metal.are the most common occurrence,and those at the FeNi metal.troil.te interface are the second most common *** metal.ic copper grains occurring at the interface of FeNi metal.troil.l.e and sil.cate are rather *** copper grains are not observed within the Suizhou shock veins,Instead,Cu in el.mental.form is transferred through shock metamorphism into FeNi metal.troil.te *** diff erent occurrence types of Cu in the FeNi metal.troil.te intergrowths have been identifi ed:the concentrations of Cu in the FeNi+FeS intergrowths for four occurrence types are rather cl.se,we estimate it might be l.wer than 1 wt%.

关键词： Suizhou chondrite Shock vein Metal.ic copper Metal.troil.te intergrowth El.mental.intensity mapping

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