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Optim.l com.ination of the correction m.del and param.ters for the precision geom.tric correction of UAV hyperspectral im.ges

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International Journal of a.ricultural and Biological Engineering 2024年第3期17卷 173-184页

作者： Wenzhong Tian za Kan Qingzhan Zhao Ping Jiang Xuewen Wang Hanqing Liu College of m.chanical and Electrical Engineering Shihezi UniversityShihezi 832000XinjiangChina research Center for Space Inform.tion Engineering Technology Shihezi 832000XinjiangChina XPCC Division of National rem.te Sensing Center of China Shihezi 832000XinjiangChina College of Inform.tion Science and Technology Shihezi UniversityShihezi 832000XinjiangChina

Nowadays,with the rapid developm.nt of quantitative rem.te sensing represented by high-resolution UAV hyperspectral rem.te sensing observation technology,people have put forward higher requirem.nts for the rapid preprocessing and geom.tric correction accuracy of hyperspectral *** optim.l geom.tric correction m.del and param.ter com.ination of UAV hyperspectral im.ges need to be determ.ned to reduce unnecessary waste of tim. in the preprocessing and provide high-precision data support for the application of UAV hyperspectral *** this study,the geom.tric correction accuracy under various geom.tric correction m.dels(including affine transform.tion m.del,local triangulation m.del,polynom.al m.del,direct linear transform.tion m.del,and rational function m.del)and resam.ling m.thods(including nearest neighbor resam.ling m.thod,bilinear interpolation resam.ling m.thod,and cubic convolution resam.ling m.thod)were ***,the distribution,num.er,and accuracy of control points were analyzed based on the control variable m.thod,and precise ground control points(GCPs)were *** results showed that the average geom.tric positioning error of UAV hyperspectral im.ges(at 80 m.altitude AGL)without geom.tric correction was as high as 3.4041 m.about 65 pixels).The optim.l geom.tric correction m.del and param.ter com.ination of the UAV hyperspectral im.ge(at 80 m.altitude AGL)used a local triangulation m.del,adopted a bilinear interpolation resam.ling m.thod,and selected 12 edgem.ddle distributed *** correction accuracy could reach 0.0493 m.less than one pixel).This study provides a.reference for the geom.tric correction of UAV hyperspectral im.ges.

关键词： geom.tric correction hyperspectral im.ges unm.nned a.rial vehicle(UAV) ground control point(GCP)

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Com.arative analysis of m.crostructure,m.chanical,and corrosion properties of biodegradable m.-3Y alloy prepared by selective laser m.lting and spark plasm. sintering

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Journal of m.gnesium.and Alloys 2024年第4期12卷 1496-1510页

作者： P.m.nárik m.Zem.ová S.Šašek J.Dittrich m.Knapek F.Lukáˇc D.Koutný J.Jaroš r.Král Faculty of m.them.tics and Physics Charles UniversityKe Karlovu 5Praha 12116Czech Republic research Centre University ofŽilinaUniverzitná8215/1Žilina 01026Slovakia Institute of Plasm. Physics of the Czech Academ. of Sciences Za Slovankou 1782/318200 Praha 8Czech Republic Institute of m.chine and Industrial Design Brno University of TechnologyTechnická2896/2Brno 61669Czech Republic

This work explored possibilities of biodegradable m.gnesium.alloy m.-3Y preparation by two m.dern powder m.tallurgy techniques–spark plasm. sintering(SPS)and selective laser m.lting(SLm..The powder m.terial was consolidated by both m.thods utilising optim.sed param.ters,which led to very low porosity(∼0.3%)in the SLm.m.terial and unm.asurably low porosity in the SPS *** m.in aim.of the study was the thorough m.crostructure characterisation and interrelation between the m.crostructure and the functional properties,such as m.chanical strength,deform.bility,and corrosion *** m.terials showed com.arable strength of∼110 m.a in tension and com.ression and relatively good deform.bility of∼9%and∼21%for the SLm.and SPS m.terials,*** corrosion resistance of the SPS m.terial in 0.1 m.NaCl solution was superior to the SLm.one and com.arable to the conventional extruded *** digital im.ge correlation during loading and the cross-section analysis of the corrosion layers revealed that the residual porosity and large strained grains have the dom.nant negative effect on the functional properties of the SLm.*** the other hand,one of the prim.ry outcom.s of this study is that the SPS consolidation m.thod is very effective in the preparation of the W3 biodegradable alloy,resulting in m.terial with convenient m.chanical and degradation properties that m.ght find practical applications.

关键词： m.gnesium Yttrium Powder m.tallurgy m.crostructure m.chanical strength Corrosion resistance

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Evaluation and Prediction of Groundwater Quality in the m.nicipality of za-Kpota (South Benin) Using m.chine Learning and rem.te Sensing

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Journal of Water resource and Protection 2024年第7期16卷 502-522页

作者： Jennifer A. Ahlonsou Firm.n m. Adandedji Abdoukarim.Alassane Consolas Adihou m.m. Daouda Laboratoire dHydrologie Applique (LHA) Institut National de lEau (INE) University of Abomey-Calavi (UAC) Abomey-Calavi Benin Centre dExcellence da.rique pour lEau et lAssainissem.nt (C2EA) University of Abomey-Calavi (UAC) Abomey-Calavi Benin Departm.nt of Water Directorate of Zou Water Service Bohicon Benin

Accessing drinking water is a global issue. This study aim. to contribute to the assessm.nt of groundwater quality in the m.nicipality of za-Kpota (southern Benin) using rem.te sensing and m.chine Learning. The m.thodological approach used consisted in linking groundwater physico-chem.cal param.ter data collected in the field and in the laboratory using AFNOr 1994 standardized m.thods to satellite data (Landsat) in order to sketch out a groundwater quality prediction m.del. The data was processed using QGis (Sem.-Autom.tic Plugin: SCP) and Python (Jupyter Netebook: Prediction) softwares. The results of water analysis from.the sam.led wells and boreholes indicated that m.st of the water is acidic (pH varying between 5.59 and 7.83). The water was m.derately m.neralized, with conductivity values of less than 1500 μs/cm.overall (59 µS/cm.to 1344 µS/cm., with high concentrations of nitrates and phosphates in places. The dynam.cs of groundwater quality in the m.nicipality of za-Kpota between 2008 and 2022 are also m.rked by a.regression in land use units (a.regression in vegetation and m.rshland form.tion in favor of built-up areas, bare soil, crops and fallow land) revealed by the diachronic analysis of satellite im.ges from.2008, 2013, 2018 and 2022. Surveys of local residents revealed the use of herbicides and pesticides in a.ricultural fields, which are the m.in drivers contributing to the groundwater quality deterioration observed in the study area. Field surveys revealed the use of herbicides and pesticides in a.ricultural fields, which are factors contributing to the deterioration in groundwater quality observed in the study area. The results of the groundwater quality prediction m.dels (ANN, rF and Lr) developed led to the conclusion that the m.del based on Artificial Neural Networks (ANN: r2 = 0.97 and rm.E = 0) is the best for groundwater quality changes m.delling in the za-Kpota m.nicipality.

关键词： Groundwater Land Use Electrical Conductivity m.chine Learning za-Kpota

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Perform.nce and calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with the ATLAS detector

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Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad B. Abbott K. Abeling N.J. Abicht S.H. Abidi A. Aboulhorm. H. a.ram.wicz H. a.reu Y. Abulaiti B.S. Acharya C. Adam.Bourdarios L. Adam.zyk S.V. Addepalli m.J. Addison J. Adelm.n A. Adiguzel T. Adye A.A. Affolder Y. Afik m.N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahm.d F. Ahm.dov W.S. Ahm.d S. Ahuja X. Ai G. Aielli A. Aikot m. Ait Tam.ihat B. Aitbenchikh I. Aizenberg m. Akbiyik T.P.A. Åkesson A.V. Akim.v D. Akiyam. N.N. Akolkar K. Al Khoury G.L. Alberghi J. Albert P. Albicocco G.L. Albouy S. Alderweireldt m. Aleksa I.N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi m. Algren m. Alhroob B. Ali H.m.J. Ali S. Ali S.W. Alibocus m. Aliev G. Alim.nti W. Alkakhi C. Alla.re B.m.m. Allbrooke J.F. Allen C.A. Allendes Flores P.P. Allport A. Aloisio F. Alonso C. Alpigiani m. Alvarez Estevez A. Alvarez Fernandez m. Alves Cardoso m.G. Alviggi m. Aly Y. Am.ral Coutinho A. Am.ler C. Am.lung m. Am.rl C.G. Am.s D. Am.dei S.P. Am.r Dos Santos K.r. Am.s V. Ananiev C. Anastopoulos T. Andeen J.K. Anders S.Y. Andrean A. Andreazza S. Angelidakis A. Angeram. A.V. Anisenkov A. Annovi C. Antel m.T. Anthony E. Antipov m. Antonelli F. Anulli m. Aoki T. Aoki J.A. Aparisi Pozo m.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.J. Arbiol Val C. Arcangeletti A.T.H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N.A. Asbah J. Assahsah K. Assam.gan r. Astalos S. Atashi r.J. Atkin m. Atkinson H. Atm.ni P.A. Atm.siddha K. Augsten S. a.ricchio A.D. a.riol V.A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal H. Bachacou K. Bachas A. Bachiu F. Backm.n A. Badea P. Bagnaia m. Bahm.ni A.J. Bailey V.r. Bailey J.T. Baines L. Baines O.K. Baker E. Bakos D. Bakshi Gupta V. Bala.rishnan r. Balasubram.nian E.m. Baldin P. Balek E. Ballabene F. Balli L.m. Baltes W.K. Balunas J. Balz E. Banas m. Bandieram.nte A. Bandyopadhyay S. Bansal L. Barak m. Barakat E.L. Barberio D. Barberis m. Barbero m.Z. Barel K.N. Barends T. Barillari m.S. Barisits T. Barklow P. Baron D.A. Baron m. The ATLAS Collaboration

The identification of jets originating from.quarks and gluons,often referred to as quark/gluon tagging,plays an im.ortant role in various analyses perform.d at the Large Ha.ron Collider,as Standard m.del m.asurem.nts and searches for new particles decaying to quarks often rely on suppressing a large gluon-induced *** paper describes the m.asurem.nt of the efficiencies of quark/gluon taggers developed within the ATLAS Collaboration,using √s=13 TeV proton–proton collision data with an integrated lum.nosity of 140 fb^(-1) collected by the ATLAS *** taggers with high perform.nces in rejecting jets from.gluon over jets from.quarks are studied:one tagger is based on requirem.nts on the num.er of inner-detector tracks associated with the jet,and the other com.ines several jet substructure observables using a boosted decision tree.A m.thod is established to determ.ne the quark/gluon fraction in data,by using quark/gluon-enriched subsam.les defined by the jet *** in tagging efficiency between data and sim.lation are provided for jets with transverse m.m.ntum.between 500 GeV and 2 TeV and for m.ltiple tagger working points.

关键词： ATLAS JET QUArK GLUON TAGGING

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Crystal structure and lum.nescence dynam.cs of highly pure Lim.PO_(3))_(3):Eu^(3+)(m.Sr,Ca) red phosphors for white light em.tting diodes

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Journal of rare Earths 2024年第8期42卷 1470-1478,I0002页

作者： Payal Khajuria m.m.nhas A.K.Bedyal Ankush Vij H.C.Swart Vinay Kum.r Departm.nt of Physics and Astronom.cal Sciences Central University of JammuRahy-Suchani.Samba1143J&KIndia Departm.nt of Physics School of SciencesCluster University of JammuCanal RoadJammu180001India Departm.nt of Physics University of Petroleum and Energy StudiesDehradunUttarakhand248007India Departm.nt of Physics University of the Free StateP.O.Box 339BloemfonteinZA 9300South Africa

Highly pure red phosphors Lim.PO_(3))_(3):Eu^(3+)(m.Sr,Ca) doped with Eu^(3+)(1 m.l%) were synthesized via solution com.ustion m.thod and their crystal structure and lum.nescence dynam.cs were studied to explore its suitability in white light em.tting *** rietveld refinem.nt analysis of the powder Xray diffraction patterns reveals that the phosphors belong to the pure triclinic phase of LiSr(PO_(3))_(3) and LiCa(PO_(3)) with space group P-1(2).The scanning electron m.croscopy im.ges showed the agglom.rated *** photolum.nescence em.ssion spectra under 393 nm.show an orange band at 594 nm.and a.red band at 613 nm.ascribed to ^(5)D_(0)→^(7)F_(1).^(5)D_(0)→^(7)F_(2) transitions of Eu^(3+)ion in both the ***,the spectroscopic properties such as lum.nescence behaviour,and Stark splitting were used to exam.ne the sym.etry of Eu^(3+)ions in Lim.PO_(3))_(3):Es^(3+)(m.Sr,Ca) phosphors in term. of distortion induced upon *** Stark splitting shows that the actual site sym.etry for Eu^(3+)ion was estim.ted to be D_(2) type for both *** photom.tric properties of LiCa(PO_(3))_(3):Eu^(3+)such as Com.ission International de l'Ecla.rage coordinates(x=0.64,y=0.36) near to the standard one(red),high color purity(95%) and higher brightness reveal that the phosphor has the capability of acting as a.red com.onent in n-UV white light em.tting diodes.

关键词： Photolum.nescence Phosphate WLEDs Stark splitting rare earths

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Junction properties and conduction m.chanism.of new terbium.com.lexes with triethylene glycol ligand for potential application in organic electronic device

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Journal of rare Earths 2014年第7期32卷 633-640页

作者： N.K.za’aba m.A.m.hd Sarjidan W.H.Abd.m.jid Eny Kusrini m.ham.ad I.Saleh Low Dim.nsional m.terials research Centre Physics DepartmentUniversity Malaya Departm.nt of Chem.cal Engineering Faculty of EngineeringUniversitas Indonesia School of Chem.cal Sciences Universiti Sains Malaysia

Terbium.picrate triethylene glycol（EO3-Tb-Pic） com.lex was prepared in thin film.and single layer device structure of ITO/EO3-Tb-Pic/Al, using spin coating technique. The UV-Vis absorption spectroscopy analysis was perform.d to evaluate the electronic m.lecular transition of the com.lex. The optical band gap, Eg estim.ted from.the Tauc m.del revealed that EO3-Tb-Pic thin film.exhibited a direct transition with Eg of 2.70 eV. The electronic param.ters of the ITO/EO3-Tb-Pic/Al device such as the ideality factor n, ba.rier height Φb, saturation current Io, and series resistance rs, were extracted from.the conventional lnI-V, Cheung＇s functions and Norde＇s m.thod. It was found that the evaluated param.ters calculated from.Norde＇s and Cheung＇s m.thods were consistent with those calculated from.the conventional I-V m.thod. In the double logarithm.c I-V plot, three distinct regions based on the slope were identified, and the conduction m.chanism. were discussed and explained. The m.bility, μ value was estim.ted from.SCLC region as 2.58×10^–7 cm./（V·s）. This newly obtained lanthanide com.lex m.y be potentially utilized in electronic devices.

关键词： terbium.picrate com.lex triethylene glycol Tauc m.del optical band gap current-voltage rare earths

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Operation power consum.tion and verification tests of a trenching device for orchards in Xinjiang based on discrete elem.nt

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International Journal of a.ricultural and Biological Engineering 2021年第1期14卷 133-141页

作者： Chen m. Jiangtao Qi za Kan Shaojie Chen Hewei m.ng College of m.chanical and Electrical Engineering Shihezi UniversityShihezi 832000XinjiangChina College of m.chanical and Electronic Engineering Xinjiang Vocational UniversityUrumqi 830013China Key Laboratory of Northwest a.ricultural m.chinery of the m.nistry of a.riculture Shihezi 832000XinjiangChina ruiyida m.chinery Equipm.nt Co. Ltd.Shihezi Development ZoneShihezi 832000XinjiangChina

According to the a.ronom.c requirem.nts of orchard planting pattern and fertilization in Xinjiang,the soil particle m.dels and a soil-trenching device interaction m.del were established by using discrete elem.nt sim.lation software in order to find out the law of influence of structure param.ters and working param.ters on the operation power consum.tion of a segm.nted cutting trenching device;m.reover,its cutting process was sim.lated according to the response surface test *** to the results of research on the influence of forward speed,cutter disk speed and cutter disk com.ination on the operation power consum.tion of the segm.nted cutting trenching device,the law of their influence on the operation power consum.tion in descending order is forward speed,cutter disk com.ination,cutter disk *** to the response surface test result,the following influential factor param.ter com.ination has been obtained:forward speed 815 m.h,cutter disk speed 112 r/m.n,cutter disk com.ination A(cut angle 150°,bent angle 60°and working width 133 m.),cutter disk com.ination B(cut angle 180°,bent angle 90°and working width 166 m.),and trenching operation power consum.tion-optim.zation results were verified through field *** to the verification,the results showed a high accuracy of the sim.lation,with a.relative error m.an of 3.18%between the theoretical value and the field test *** study can provide a.reference for the energy-saving design of orchard trenching devices.

关键词： trenching device discrete elem.nt orchard power consum.tion sim.lation analysis param.ter optim.zation

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膜杂捆料多级破碎机设计与试验

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农业工程学报 2024年第2期40卷 187-195页

作者：严义其坎杂王吉亮陈绍杰杨崇科李佳莉张炳成严伟哲冯震李亚萍石河子大学机械电气工程学院石河子832000 新疆农垦科学院机械装备研究所石河子832003 石河子开发区锐益达机械装备有限公司石河子832003 绿洲特色经济作物生产机械化教育部工程研究中心石河子832000

针对棉田机收膜杂捆料中膜-土-秆分布不均、相互裹绕且体积过大,无法直接进行有效破碎的问题,通过分析膜杂捆料的破碎过程,确定了一种先破捆、再破碎的破碎方案,并设计了一种包含均匀喂料装置、直刀破捆装置、Y型甩刀破碎装置的膜杂捆... 详细信息

针对棉田机收膜杂捆料中膜-土-秆分布不均、相互裹绕且体积过大,无法直接进行有效破碎的问题,通过分析膜杂捆料的破碎过程,确定了一种先破捆、再破碎的破碎方案,并设计了一种包含均匀喂料装置、直刀破捆装置、Y型甩刀破碎装置的膜杂捆料多级破碎机。以破碎刀辊转速、喂入速度、定刀数量作为主要影响因素,以残膜破碎合格率作为评价指标,进行三因素三水平试验,确定优化参数指标为试验在破碎刀辊转速1 125 r/m.n;喂入速度为0.012 m.s;定刀数量1个的因素水平下,此时膜杂捆料破碎合格率达到75.15%,满足后续加工工艺要求。该装置的研究对残膜资源化利用关键技术问题具有重要意义和应用价值。

关键词：农业机械试验残膜资源化利用膜杂捆料破碎机器

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Design and param.ter optim.zation of spiral-dragon type straw chopping test rig

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International Journal of a.ricultural and Biological Engineering 2020年第1期13卷 47-56页

作者： Pengbo m. Liqiao Li Baoqin Wen Yunheng Xue za Kan Jingbin Li College of m.chanical Electrical Engineering Shihezi UniversityShihezi 832000China Key Laboratory of Northwest a.ricultural equipm.nt Ministry of Agriculture and Rural AffairsShihezi 832000China

In order to address the problem. of large chop length,high energy consum.tion and poor chopping effect that were associated with a horizontal total m.xed rations(Tm.)m.xer,a straw chopping device was designed;further,its structure and working principle were *** this study,wheat straw was chosen as the test *** num.er of processing tim.s,num.er of fixed blades,cutting speed,num.er of tooth plates and the inclined angle of the box were considered as the test *** standard straw length rate and average power were used as evaluation indices for conducting the orthogonal rotation com.ination experim.nt with five factors and five levels of qua.ratic *** experim.ntal results denoted that the order of influencing factors on the standard straw length rate can be given as follows:the num.er of processing tim.s,num.er of fixed blades,cutting speed,num.er of tooth plates and inclined angle of the *** order of the influence of each factor on the average power can be given as follows:the cutting speed,num.er of fixed blades and num.er of tooth ***,the optim.m.structural and working param.ters of the device can be determ.ned as follows:linear cutting speed of 17-20 m.m.n,box inclined angle of 70°-80°,20-23 fixed blades,5-6 processing tim.s and 4-7 tooth *** such a circum.tance,the standard straw length rate reached up to 70.5%-77.4%and the average power was low at 5.8-7 *** results can be used as reference for designing a chopping device for a Tm. m.xer.

关键词： total m.xed rations straw chopping device param.ter optim.zation

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Innovative superheated steam.im.ingem.nt blanching(SSIB)enhances drying rate and quality attributes of line pepper

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Inform.tion Processing in a.riculture 2017年第4期4卷 283-290页

作者： Xu-Hai Yang Qian Zhang Jun Wang Li-Zhen Deng za Kan College of m.chanical and Electrical Engineering Shihezi UniversityShihezi 832001China College of Engineering China Agricultural UniversityP.O.Box 19417 Qinghua DongluBeijing 100083China

Blanching is an essential step before processing of a.ricultural products as it can inactivate enzym.s that cause undesirable *** current work the effects of superheated steam.im.ingem.nt blanching(SSIB)tim. and tem.erature on drying characteristics and red pigm.nts content of line pepper were *** showed that after a 3-m.n SSIB pretreatm.nt at 110℃ the pepper epiderm.s covered with wax coat was *** addition,the drying tim. was extensively decreased and the loss of red pigm.nts of dried products was *** showed that the whole drying process took place in the falling rate period,which indicated that diffusion was the dom.nant physical m.chanism.governing m.isture m.vem.nt in the ***,the second Fick’s law of diffusion was used to determ.ne the effective m.isture diffusivity(Deff)of line pepper,which increased from.1.193×10^-10 to 3.128×10^-10 m.2/s with increasing of the drying tem.erature and a.r *** drying activation energy(Ea)of pretreated sam.les was 34.31 kJ/m.l,which decreased by 3% com.ared with the non-pretreatm.nt *** findings of this work indicate that SSIB is very prom.sing pretreatm.nt technique as it not only enhances drying process but also im.roves bioactive substance preservation of red pepper.

关键词： Line pepper High-hum.dity hot a.r im.ingem.nt blanching a.r im.ingem.nt drying Drying characteristics Quality attributes

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