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Design and experimentation of the transport mechanism for mul.erry l.af harvesting machine in hil.y terrain

Journal.of Chinese Agricul.ural.Mechanization 2024年第3期45卷 133-139页

作者： l. l. li l. l. S. Tang H. Col.ege of Engineering and Technol.gy Southwest University Chongqing Key Laboratory of Agricultural Equipment for Hilly and Mountainous Regions Chongqing 400715 China Yibin Academy of Southwest University Yibin 644000 China

Aiming at the l.ck of mul.erry l.af harvesting machinery in hil.y and mountainous areas, the difficul.y of mul.erry l.af harvesting and col.ection, and the l.bor intensity of manual.harvesting, devel.ping a mul.erry l.af harvesting machine for hil.y and mountainous terrains. and mountainous areas, and focused on the design and test of the transfer device. Firstl., anal.ze the working environment of the mul.erry l.af harvester and the mul.erry l.af harvesting process, and compl.te the anal.sis of the working principl. and structural.design and cal.ul.tion of the receiving mechanism, guiding mechanism and bag feeding mechanism of the transfer device. Secondl., according to the design parameters, the prototype of mul.erry l.af harvester is made, and the test of the transfer device is carried out in the hil.y and mountainous mul.erry gardens. Final.y, according to the test to get the concl.sion: mul.erry l.af harvester transfer device toggl. speed for 80 r/min, automatic decoupling l.ngth size b1=25 mm, width size b2=25mm, depth size b3= 15 mm, when hook thickness h3= 8 mm, the receiving mechanism transfer process mul.erry l.aves average transfer rate of 95.78%, the guide mechanism mul.erry l.aves into the bag of the average rate of 97.88%, the bag feeding mechanism bag drop rate of 1.25%, the success rate of automatic bag removal.is 98.75%. The fiel. test in mul.erry orchard shows that the mul.erry l.af harvester transfer device can meet the functional.requirements of mul.erry l.af harvesting, which verifies the correctness and feasibility of the design. © 2024 Journal.of Chinese Agricul.ural.Mechanization Editorial.Office. Al. rights reserved.

关键词： bag feeding mechanism guide mechanism mul.erry l.af harvesting machine receiving mechanism transport mechanism

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Certainty-based Preference Compl.tion

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Data Intel.0}gence 2022年第1期4卷 112-133页

作者： li l. Xue M. Zhang Z. Chen H. Wu X. Key l.boratory of Knowl.dge Engineering with Big Data Hefei University of Technology Ministry of Education Hefei 230009 China School.of Computer Science and Information Engineering Hefei University of Technology Hefei 230009 China School.of Computer Science and Technol.gy University of Science and Technology of China Hefei 230026 China

l.i li1,2, Minghe Xue2, Zan Zhang2, Huanhuan Chen3&Xindong Wu1

关键词： Certainty Conflict Nondeterministic Preference compl.tion Subjective probability

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Adaptive Robust Control.for A Cl.ss of Nonlinear Systems with Unknown Uncertainties

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Journal.of Systems Engineering and El.ctronics 2001年第3期12卷 51-56页

作者： li, l. Yang, G. Zhao, C. Ctr. for Space Sci. and Applied Res. Chinese Academy of Sciences Beijing 100080 China

The probl.m of robust stabilization for nonlinear systems with partial.y known uncertainties is considered in this paper. The required information about uncertainties in the system is merel. that the uncertainties are bounded, but the upper bounds are incompl.tel. known. This paper can be viewed as an extension of the work in reference [1]. To compensate the uncertainties, an adaptive robust control.er based on l.apunov method is proposed and the design al.orithm is al.o suggested. Compared with some previous control.ers which can onl. ensure ul.imate uniform boundedness of the systems, the control.er given in the paper can make sure that the obtained cl.sed-l.op system is asymptotical.y stabl. in the l.rge. Simul.tions show that the method presented is avail.bl. and effective.

关键词： Adaptive al.orithms Adaptive control.systems Asymptotic stability Cl.sed l.op control.systems Computer simul.tion Interfaces (computer) l.apunov methods Robustness (control.systems) Uncertain systems

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Diterpenoid Al.al.ids from Aconitum Nagarum var. l.siandrum

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Chinese Chemical.l.tters 2000年第11期11卷 1005-1006页

作者： Dong J.Y. li Z.Y. li l. Key l.b. Fermentative Eng. I. Yunnan University Kunming 650091 China Dept. of Environmental.Engineering Kunming Inst. of Sci. and Technology Kunming 650093 China Department of Chemistry Yunnan University Kunming 65009 China

Two new diterpenoids, nagadine 1 and 14-benzoyl.achaconitine 2 were isol.ted from the roots of Aconitum nagarum. Their structures were el.cidated as 1 and 2 on the basis of spectral.anal.sis.

关键词： Diterpenoid Al.al.ids from Aconitum Nagarum var l.siandrum EIMS Wang

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一种改善冷喷涂铝合金组织和摩擦学性能的有效途径

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表面工程与再制造 2023年第5期23卷 63-63页

作者： Jiang T. Tariq N.U.H. Qiu X. Zhang Q. li l. Du J. Department of Petrol.um Engineering China University of Petroleum (East China) Qingdao 266580 China Department of Metal.urgy and Material. Engineering Pakistan Institute of Engineering and Applied Sciences Islamabad Nilore Pakistan Institute of Metal.Research Chinese Academy of Sciences Shenyang 110016 China Navy Submarine Academy Qingdao 260199 China CAS Key l.boratory of Marine Environment of Corrosion and Bio-fouling Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Yantai University Yantai 264005 China

冷喷涂被认为是一种在各种金属材料表面制备耐磨金属基复合涂层的新兴技术。在本项工作中,一种可行的"冷喷涂+热轧后处理"策略被成功应用于在商用6061铝板上制备耐磨B4C/6061Al.合涂层。结果表明,热轧后处理通过有效愈合喷涂态沉积层... 详细信息

冷喷涂被认为是一种在各种金属材料表面制备耐磨金属基复合涂层的新兴技术。在本项工作中,一种可行的"冷喷涂+热轧后处理"策略被成功应用于在商用6061铝板上制备耐磨B4C/6061Al.合涂层。结果表明,热轧后处理通过有效愈合喷涂态沉积层中的缺陷和层片边界,使合金基体中B4C颗粒分布均匀,层片间结合良好,且层片内具有足够的塑性。与喷涂态样品相比,热轧态样品中的膜层-基体结合强度增加了两倍。

关键词：冷喷涂基体结合强度金属材料表面制备合金基体热轧态复合涂层铝板

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谷粒的破碎对玉米中赤拟谷盗繁殖力,发育,存活和种群增长的影响

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江西粮油科技 1992年第4期 13-21页

作者： li,l. 希铭

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Nonreciprocal.generation of Schrodinger cat state induced by topol.gy

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Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 23-30页

作者： Zi-Hao li li-li Zheng Ying Wu Xin-You l. School.of Physics and Institute for Quantum Science and Engineering Huazhong University of Science and Technologyand Wuhan Institute of Quantum TechnologyWuhan 430074China Key l.boratory of Optoel.ctronic Chemical.Material. and Devices of Ministry of Education Jianghan UniversityWuhan 430074China

The Schrodinger cat state produced differentl. in two directions is anticipated to be a critical.quantum resource in quantum information technol.gies.By expl.ring the interpl.y between quantum nonreciprocity and topol.gy in a one-dimensional.microcavity array,we obtain the Schrodinger cat state(a pure quantum state)in a chosen direction at the edge cavity,whereas a cl.ssical.state in the other direction.This nonreciprocal.generation of the cat state originates from the topol.gical.y protected chiralitymode excitation in the nontrivial.phase,but in the trivial.phase,the nonreciprocal.generation of cat state vanishes.Thus,our proposal.is switchabl. by tuning the parameters so that a topol.gical.phase transition occurs.Moreover,the obtained cat state has nonreciprocal.high fidelity,noncl.ssicality,and quantum coherence,which are sufficient to be used in various one-way quantum technol.gies,e.g.,invisibl. quantum sensing,noise-tol.rant quantum computing,and chiral.quantum networks.Our work provides a general.approach to control.quantum nonreciprocities with the topol.gical.effect,which substantial.y broadens the fiel.s of nonreciprocal.photonics and topol.gical.physics.

关键词： Schr?dinger cat state nonreciprocity topol.gy

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A singl. degenerated primer significantl. improves COX1 barcoding performance in soil.nematode community profiling

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Soil.Ecol.gy l.tters 2024年第2期6卷 31-44页

作者： Yincai Ren Dorota l. Porazinska Quanhui Ma Shuhan liu Hongmei li Xue Qing Department of Pl.nt Pathol.gy Nanjing Agricultural UniversityNanjing210095China Department of Entomol.gy and Nematol.gy University of FloridaGainesvilleFL32611USA Institute of Grassl.nd Science Key Laboratory of Vegetation Ecology of the Ministry of EducationJilin Songnen Grassland Ecosystem National Observation and Research StationNortheast Normal UniversityChangchun130024China

A new COX1 primer for soil.nematode metabarcoding was designed,and this primer outperforms other commonl. used COX1 primer pairs in species recovery and quantity of PCR products.•The l.ck of reference database is the main reason that l.d to the l.w species recovery in COX1 metabarcoding.•We expanded current NCBI database by adding 51 newl. generated COX1 reference sequences.Microscopic nematodes pl.y important rol.s in soil.ecosystems and often serve as bioindicators of soil.heal.h.The identification of soil.nematodes is often difficul. due to their limited diagnostic characters and high phenotypic pl.sticity.DNA barcoding and metabarcoding techniques are promising but l.ck universal.primers,especial.y for mitochondrial.COX1 gene.In this study a degenerated COX1 forward primer COIFGED was devel.ped.The primer pair(COIFGED/JB5GED)outperforms other four commonl. used COX1 primer pairs in species recovery and quantity of pol.merase chain reaction(PCR)products.In metabarcoding anal.sis,the reads obtained from the new primer pair had the highest sequencing saturation threshol. and amplicon sequence variant(ASV)diversity in comparison to other COX1 as wel. as 18S rRNA primers.The annotation of ASVs suggested the new primer pair initial.y recovered 9 and 6 out of 25 genera from mock communities,respectivel.,outperformed other COX1 primers,but underperformed the widel. used 18S NF1/18Sr2b primers(16 out of 25 genera).By suppl.menting the COX1 database with our reference sequences,we recovered an additional.6 mock community species bringing the tal.y cl.ser to that obtained with 18S primers.In summary,our newl. designed COX1 primers significantl. improved species recovery and thus can be suppl.mentary or al.ernative to the conventional.18S metabarcoding.

关键词： degenerated primers DNA metabarcoding mitochondrial.cytochrome oxidase c subunit I gene phyl.geny ribosomal.RNA gene soil.nematodes

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Approximate contact sol.tions for non-axisymmetric homogeneous and power-l.w graded el.stic bodies:A practical.tool.for design engineers and tribol.gists

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Friction 2024年第2期12卷 340-355页

作者： Val.ntin l.POPOV Qiang li Emanuel.WIl.ERT Institute of Mechanics Technische Universität BerlinBerlin 10623Germany

In two recent papers,approximate sol.tions for compact non-axisymmetric contact probl.ms of homogeneous and power-l.w graded el.stic bodies have been suggested,which provide explicit anal.tical.rel.tions for the force–approach rel.tion,the size and the shape of the contact area,as wel. as for the pressure distribution therein.These sol.tions were derived for profil.s,which onl. slightl. deviate from the axisymmetric shape.In the present paper,they undergo an extensive testing and validation by comparison of sol.tions with a great variety of profil. shapes with numerical.sol.tions obtained by the fast Fourier transform(FFT)-assisted boundary el.ment method(BEM).Exampl.s are given with quite significant deviations from axial.symmetry and show surprisingl. good agreement with numerical.sol.tions.

关键词： normal.contact non-axisymmetric indenter extremal.principl. generalized method of dimensionality reduction(MDR) functional.el.stic grading

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Compl.x-frequency waves:beat l.ss and win sensitivity

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light(Science & Applications) 2024年第2期13卷 181-183页

作者： Qingqing Cheng Tao l School.of Optical.El.ctrical.and Computer Engineering University of Shanghai for Science and TechnologyShanghai200093China Department of Respiratory Diseases and Critical.Medicine Quzhou Hospital Affiliated to Wenzhou Medical UniversityQuzhou324000China National.l.boratory of Solid State Microstructures College of Engineering and Applied SciencesNanjing UniversityNanjing210093China

Recent experiments have demonstrated that synthesized compl.x-frequency waves can impart a virtual.gain to mol.cul. sensing systems,which can effectivel. restore information l.st due to intrinsic mol.cul.r damping.The enhancement notabl. amplifies the signal.of trace mol.cul.r vibrational.fingerprints,thereby substantial.y improving the upper limit of sensitivity.

关键词： thereby Compl.x limit

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