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Mechanical Analysis and Performance Optimization for the Lunar Rover’s Vane-Telescopic Walking Wheel

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Engineering 2020年第8期6卷 936-943页

作者： Lu Yang Bowen Cai ronghui zhang Kening Li Zixian zhang Jiehao Lei Baichao Chen Rongben Wang Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical EngineeringTianjin University of TechnologyTianjin 300384China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of TechnologyTianjin 300384China Guangdong Key Laboratory of Intelligent Transportation System School of Intelligent Systems EngineeringSun Yat-sen UniversityGuangzhou 510275China College of Transportation Jilin UniversityChangchun 130025China Department of Mechanical Science and Engineering Tokyo Institute of TechnologyTokyo 152-8550Japan Armour College of Engineering Illinois Institute of TechnologyChicagoIL 60616USA China Academy of Space Technology Beijing 100029China

It is well-known that optimizing the wheel system of lunar rovers is essential.However,this is a difficult task due to the complex terrain of the moon and limited resources onboard lunar rovers.In this study,an experimental prototype was set up to analyze the existing mechanical design of a lunar rover and improve its performance.First,a new vane-telescopic walking wheel was proposed for the lunar rover with a positive and negative quadrangle suspension,considering the complex terrain of the moon.Next,the performance was optimized under the limitations of preserving the slope passage and minimizing power consumption.This was achieved via analysis of the wheel force during movement.Finally,the effectiveness of the proposed method was demonstrated by several simulation experiments.The newly designed wheel can protrude on demand and reduce energy consumption;it can be used as a reference for lunar rover development engineering in China.

关键词： Intelligent vehicle Vane-telescopic walking wheel Performance optimization Vane spring Lunar rover

Lane-change path planning and control method for self-driving articulated trucks

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Journal of Intelligent and Connected Vehicles

Journal of Intelligent and Connected Vehicles 2020年第2期3卷 49-66页

作者： Tao Peng Xingliang Liu Rui Fang ronghui zhang Yanwei Pang Tao Wang Yike Tong School of Electrical and Information Engineering Tianjin UniversityTianjinChina Joint Laboratory for Internet of Vehicles Ministry of Education-China Mobile Communications CorporationBeijingChina China Automotive Technology and Research Center Co.Ltd. TianjinChina Guangdong Key Laboratory of Intelligent Transportation System School of Intelligent Systems EngineeringSun Yat-sen UniversityZhuhaiChina Tianjin University of Technology and Education TianjinChina Zhejiang University of Technology HangzhouChina

Purpose–This study aims to develop an automatic lane-change mechanism on highways for self-driving articulated trucks to improve trafﬁc safety.Design/methodology/approach–The authors proposed a novel safety lane-change path planning and tracking control method for articulated vehicles.A double-Gaussian distribution was introduced to deduce the lane-change trajectories of tractor and trailer coupling characteristics of intelligent vehicles and roads.With different steering and braking maneuvers,minimum safe distances were modeled and calculated.Considering safety and ergonomics,the authors invested multilevel self-driving modes that serve as the basis of decision-making for vehicle lane-change.Furthermore,a combined controller was designed by feedback linearization and single-point preview optimization to ensure the path tracking and robust stability.Specialized hardware in the loop simulation platform was built to verify the effectiveness of the designed method.Findings–The numerical simulation results demonstrated the path-planning model feasibility and controller-combined decision mechanism effectiveness to self-driving trucks.The proposed trajectory model could provide safety lane-change path planning,and the designed controller could ensure good tracking and robust stability for the closed-loop nonlinear system.Originality/value–This is a fundamental research of intelligent local path planning and automatic control for articulated vehicles.There are two main contributions:theﬁrst is a more quantiﬁable trajectory model for self-driving articulated vehicles,which provides the opportunity to adapt vehicle and scene changes.The second involves designing a feedback linearization controller,combined with a multi-objective decision-making mode,to improve the comprehensive performance of intelligent vehicles.This study provides a valuable reference to develop advanced driving assistant system and intelligent control systems for self-driving articulated vehicles.

关键词： Feedback linearization Combined controller Double Gaussian distribution Lane-change path planning Preview optimization Self-driving articulated truck

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贵州青黄泥田重金属元素低积累水稻品种筛选

中国稻米 2024年第1期30卷 75-83页

作者：张容慧张秀锦柴冠群范成五何腾兵秦松贵州大学农学院贵阳550025 贵州大学新农村发展研究院贵阳550025 贵州民族大学贵阳550025 贵州省农业科学院土壤与肥料研究所贵阳550025

以贵州中部地区近年主栽的10个水稻品种为试验材料,在中轻度重金属复合污染农田土壤上开展田间原位小区试验,探究不同水稻品种对镉(Cd)、铬(Cr)、铅(Pb)、镍(Ni)、铜(Cu)和锌(Zn)的吸收累积能力差异,并筛选出适宜贵州中部青黄泥田种植... 详细信息

以贵州中部地区近年主栽的10个水稻品种为试验材料,在中轻度重金属复合污染农田土壤上开展田间原位小区试验,探究不同水稻品种对镉(Cd)、铬(Cr)、铅(Pb)、镍(Ni)、铜(Cu)和锌(Zn)的吸收累积能力差异,并筛选出适宜贵州中部青黄泥田种植的重金属低累积水稻品种。结果表明,不同水稻品种根区土壤重金属含量存在一定的田间异质性,且同一品种的重复之间也具有一定的田间异质性;不同水稻品种糙米对不同重金属元素累积具有显著性差异,参试水稻品种糙米对重金属的富集能力强弱整体表现为Zn>Cd>Cr>Cu>Ni>Pb。水稻品种间对同一典型有害重金属元素的累积存在显著差异,按照糙米中重金属含量进行聚类分析,可以把水稻品种划分为较高值类、中间值类和较低值类3个类别。10个水稻品种糙米综合污染指数(P_(Z))(0.94~3.34)介于无污染至重度污染之间,Cr为主要污染贡献者,其单项污染指数(P_(i))在0.47~1.94之间。供试水稻品种产量在8242.8~13434.0 kg/hm^(2)之间,平均产量为10843.8 kg/hm^(2),极差相差较大,为47.9%。筛选出宜香优800为适宜该地种植的重金属低积累水稻品种。

关键词：水稻重金属低累积品种产量青黄泥田贵州

A Biomimetic Model of Fiber-reinforced Composite Materials

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Journal of Materials Science & Technology 1994年第1期10卷 34-38页

作者： Shihong LI ronghui zhang Shaoyun FU Xin CHEN and Benlian ZHOU(Institute of Metal Research, Academia Sinica, Shenyang, 110015, China)Qiyun ZENG(Institute of Applied Ecology, Academia Sinica, Shenyang, 110015, China) Inst of Metal Research Shengyang China

In thjs paper. bamboo fiber has been. on micro scale. investigated as a helical. multi-layered hollow cylinder, the stiffness featu res of bamboo bast fiber were compared with those of a multifilament yarn in traditional fiber-reinforced composite materials, Moreover. a biomimetic model of the reinforce ment of fiber-reinforced composite materials was proposed by imitating the fine structure of bamboo bast fiber. The results show that the comprehensive stiffness properties of the cornplicated fine struc ture of bamboo fiber is superior over those of traditional fiber-reinforced composites.

关键词： Cl A Biomimetic Model of Fiber-reinforced Composite Materials

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服务主导下智库型知识库模型构建与服务研究

武汉理工大学学报（信息与管理工程版） 2024年第3期46卷 474-480页

作者：杨尚悦吕新华杜莹琦张蓉晖夏琦武汉理工大学图书馆湖北武汉430070 中国科学院武汉文献情报中心湖北武汉430064

为推进机构知识库的发展,提升服务质量和水平,提供服务创新理论支持与保障,构建高校智库型机构知识库服务模式,寻找服务创新的具体流程。在服务主导逻辑视角下,从用户层、需求层、服务层3个层次构建服务创新模型,对咨询服务流程进行具... 详细信息

为推进机构知识库的发展,提升服务质量和水平,提供服务创新理论支持与保障,构建高校智库型机构知识库服务模式,寻找服务创新的具体流程。在服务主导逻辑视角下,从用户层、需求层、服务层3个层次构建服务创新模型,对咨询服务流程进行具体分析。阐述了高校智库型机构知识库的服务理念,展现服务主导逻辑在咨询服务中的应用过程,推动平台的多样化建设。结果表明:在高校智库型机构知识库的服务过程中,要以用户需求为出发点,以海量资源为基础,以合理制度为保障,实现用户与平台的知识交流与价值共创。

关键词：智库型机构知识库服务创新服务主导逻辑委托型咨询服务推动型咨询服务价值共创

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Erosion Mechanism of Al_(2)O_(3)-SiC Castables for Lining Maintenance in Blast Furnace Hearths

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China's Refractories 2022年第2期31卷 17-23页

作者： SUN Saiyang MA Xiaoqing WANG Xingwei ZHAO Yong zhang ronghui FEI Weibao Beijing Allied Rongda Engineering Material Co. Ltd.Beijing 101400China Nanjing Allied Rongda Engineering Material Co. Ltd.Nanjing 210036China Dalian Special Steel Co. Ltd.Dalian 116105China

Al_(2)O_(3)-SiC castables,for the relining of BF hearths in mid-campaign repair,were sampled and investigated after two years’service.The chemical and mineralogical characteristics of the residual castables were analyzed by X-ray diffraction,scanning electron microscopy,and energy dispersive X-ray spectrometry to study the erosion mechanism.The results show that as gaseous K diffuses in the castables,leucite(KAlSi_(2)O_(8))and multiple cracks are formed.Molten iron and slag penetrate through the cracks to form anorthite([Ca,Na][Al,Si]_(4)O_(8))and iron,which will not form an embrittlement layer similar to carbon bricks.The entire repair of the hearth with Al_(2)O_(3)-SiC castables combined with the design of thin-wall lining hearth eliminates“elephant foot shaped”erosion,greatly prolonging the service life of the hearth lining.

关键词： alumina-silicon carbide castables blast furnace hearth repair erosion mechanism thin-wall lining

Woven fabric triboelectric nanogenerators for human-computer interaction and physical health monitoring

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Nano Research 2024年第6期17卷 5540-5548页

作者： Yu Miao Mengjuan Zhou Jia Yi Yanyan Wang Guangjin Tian Hongxia zhang Wenlong Huang Wenhao Wang ronghui Wu Liyun Ma College of Textile and Clothing Xinjiang UniversityUrumqi 830046China College of Textiles Donghua UniversityShanghai 201620China College of Physics Xiamen UniversityXiamen 201620China Department of Bioengineering Imperial College LondonLondon SW72AZUK

Triboelectric nanogenerator(TENG)converts mechanical energy into valuable electrical energy,offering a solution for future energy needs.As an indispensable part of TENG,textile TENG(T-TENG)has incredible advantages in harvesting biomechanical energy and physiological signal monitoring.However,the application of T-TENG is restricted,partly because the fabric structure parameter and structure on T-TENG performance have not been fully exploited.This study comprehensively investigates the effect of weaving structure on fabric TENGs(F-TENGs)for direct-weaving yarn TENGs and post-coating fabric TENGs.For direct-weaving F-TENGs,a single-yarn TENG(Y-TENG)with a core-sheath structure is fabricated using conductive yarn as the core layer yarn and polytetrafluoroethylene(PTFE)filaments as the sheath yarn.Twelve fabrics with five different sets of parameters were designed and investigated.For post-coating F-TENGs,fabrics with weaving structures of plain,twill,satin,and reinforced twill were fabricated and coated with conductive silver paint.Overall,the twill F-TENGs have the best electrical outputs,followed by the satin F-TENGs and plain weave F-TENGs.Besides,the increase of the Y-TENG gap spacing was demonstrated to improve the electrical output performance.Moreover,T-TENGs are demonstrated for human-computer interaction and self-powered real-time monitoring.This systematic work provides guidance for the future T-TENG’s design.

关键词： single-yarn triboelectric nanogenerators woven fabric triboelectric nanogenerators fabric weaving structures and parameters human-computer interaction physical health monitoring

Mitigating growth-stress tradeoffs via elevated TOR signaling in rice

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Molecular Plant 2024年第2期17卷 240-257页

作者： Wei Li Jiaqi Liu Zeqi Li Ruiqiang Ye Wenzhen Chen Yuqing Huang Yue Yuan Yi zhang Huayi Hu Peng Zheng Zhongming Fang Zeng Tao Shiyong Song ronghui Pan Jian zhang Jumim Tu Jen Sheen Hao Du State Key Laboratory of Rice Biology College of Agriculture and BiotechnologyZhejiang UniversityYu-Hang-Tang Road No.866Hangzhou 310058China ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 311215China Hainan Institute of Zhejiang University Sanya 572025China National Key Laboratory of Plant Molecular Genetics CASCenter for Excellence in Molecular Plant SciencesShanghai lnstitute of Plant Physiology and EcologyChineseAcademy of SciencesShanghai 200032China Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region(Ministry of Education) College of Agricultural SciencesGuizhouUniversityGuiyang 550025China State Key Laboratory of Rice Biology and Breeding China National Rice Research InstituteHangzhou 311400China Department of Molecular Biology and Center for Computational and Integrative Biology Massachusetts General Hospitaland Department of GeneticsHarvard Medical SchoolBostonMA02114USA

Rice production accounts for approximately half of the freshwater resources utilized in agriculture,result-ing in greenhouse gas emissions such as methane(CH4)from flooded paddy fields.To address this chal-lenge,environmentally friendly and cost-effective water-saving techniques have become widely adopted in rice cultivation.However,the implementation of water-saving treatments(WsTs)in paddy-field rice has been associated with a substantial yield loss of up to 50%as well as a reduction in nitrogen use efficiency(NUE).In this study,we discovered that the target of rapamycin(TOR)signaling pathway is compromised in rice under WsT.Polysome profiling-coupled transcriptome sequencing(polysome-seq)analysis unveiled a substantial reduction in global translation in response to WST associated with the downregulation of TOR activity.Molecular,biochemical,and genetic analyses revealed new insights into the impact of the positive TOR-S6K-RPS6 and negative TOR-MAF1 modules on translation repression under WST.Intriguingly,ammonium exhibited a greater ability to alleviate growth constraints under WsT by enhancing TOR signaling,which simultaneously promoted uptake and utilization of ammonium and nitrogen allocation.We further demonstrated that TOR modulates the ammonium transporter AMT1;1 as well as the amino acid permease APP1 and dipeptide transporter NPF7.3 at the translational level through the 5'untranslated region.Collectively,these findings reveal that enhancing TOR signaling could mitigate rice yield penalty due to WST by regulating the processes involved in protein synthesis and NUE.Our study will contribute to the breeding of new rice varieties with increased water and fertilizer utilization efficiency.

关键词： target of rapamycin TOR water-saving rice low-carbon agriculture drought nitrogen use efficiency NUE

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上博简残漶字拟补四则

出土文献 2022年第1期 56-60,31,155,156页

作者：张荣辉中山大学中国语言文学系

上博简五《弟子问》简11首端残字"■",拟补为"■";简17、18旧释作"■"的残漶字,拟补为"■";附简"谓"下一残漶字"■",拟补为"身",读作"仁"。上博简七《凡物流形》甲本简8首端残漶字"■",拟补为"自",为"百"字的讹写。

关键词：上博简《弟子问》《凡物流形》残漶字拟补