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Finite-time path following control of a sailboat with actuator failure and unknown sideslip angle

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浙江大学学报(英文版)A辑:应用物理与工程 2023年第9期24卷 749-761页

作者： yujin wu Kangjian SHAO Ning WANG Zhongchao DENG Science and Technology on Underwater Vehicle Laboratory Harbin Engineering UniversityHarbin 150001China School of Marine Engineering Dalian Maritime UniversityDalian 116026China

Suffering from actuator failure and complex sideslip angle,the motion control of a sailboat becomes *** this paper,an improved double finite-time observer-based line-of-sight guidance and finite-time control(IDFLOS-FC)scheme is presented for path following of *** salient features of the proposed IDFLOS-FC scheme are as follows:(1)Considering the problem of actuator failure,an actuator failure model is introduced into the dynamics model of a sailboat.(2)The time-varying sideslip angle of the sailboat is accurately observed by the double finite-time sideslip observers(DFSOs),which reduces the error in line-of-sight(LOS)guidance.(3)A radial basis function(RBF)neural network is used to fit the uncertainty of the model,and the upper bound of the sum of fault effects and external disturbances is estimated based on adaptive theory,so that the controller has accurate tracking and interference suppression.(4)According to the Lyapunov method,the system is finite-time ***,simulation was used to validate the effectiveness of the method.

关键词： Sailboat Sideslip angle Sideslip angle observer Finite-time control(FC) Path following

司美格鲁肽联合二甲双胍对老年2型糖尿病患者血糖水平的影响

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糖尿病新世界 2024年第4期27卷 107-110页

作者：段琦吴玉巾孙晓茹泉州市第一医院福建泉州362000

目的分析老年2型糖尿病(Type 2 Diabetes Mellitus,T2DM)患者治疗中在二甲双胍基础上加入司美格鲁肽对血糖水平的影响。方法选取泉州市第一医院于2023年1—10月收治的96例老年T2DM患者作为研究对象,采用掷硬币法分为参照组(n=48,单纯应... 详细信息

目的分析老年2型糖尿病(Type 2 Diabetes Mellitus,T2DM)患者治疗中在二甲双胍基础上加入司美格鲁肽对血糖水平的影响。方法选取泉州市第一医院于2023年1—10月收治的96例老年T2DM患者作为研究对象,采用掷硬币法分为参照组(n=48,单纯应用二甲双胍)、观察组(n=48,二甲双胍基础上联合司美格鲁肽),比较两组血糖水平、炎性因子水平、不良反应发生率。结果与治疗前比较,治疗90 d后两组血糖水平均有所降低,且观察组低于参照组,差异有统计学意义(P均0.05)。观察组治疗总有效率(95.83%)高于参照组,差异有统计学意义(χ^(2)=5.031,P<0.05)。结论老年T2DM患者治疗中在二甲双胍基础上加入司美格鲁肽,可改善患者血糖水平、炎性因子水平,提高临床治疗效果,安全性较高。

关键词： 2型糖尿病二甲双胍司美格鲁肽血糖水平炎性因子

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基于CiteSpace的有关绵羊繁殖周期研究知识图谱分析

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畜牧与兽医 2024年第4期56卷 7-15页

作者：张金煜苑志宇王嵩吴毓瑾王春昕吉林省农业科学院吉林公主岭136100 延边大学吉林延吉133002

为全面分析绵羊繁殖周期的研究现状及变化趋势,本文采用文献计量学统计方法,分析Web of Science数据库中1936—2022年有关绵羊繁殖周期研究的4732篇文献,主要内容包括:被引文献、机构、作者、关键词、研究内容等,并使用CiteSpace 6.1 R... 详细信息

为全面分析绵羊繁殖周期的研究现状及变化趋势,本文采用文献计量学统计方法,分析Web of Science数据库中1936—2022年有关绵羊繁殖周期研究的4732篇文献,主要内容包括:被引文献、机构、作者、关键词、研究内容等,并使用CiteSpace 6.1 R6软件绘制网络知识图谱。结果:近年来国外绵羊繁殖周期相关发文量略有增长,我国对其关注度不断提高,相关领域科研支持大幅度提升;绵羊繁殖周期相关成果被引频次逐年增加,且与发文量成正比,各国之间有关科研领域交流正在不断增强;美国、英国、澳大利亚等国家对绵羊繁殖周期研究的成果较多,我国在该领域投入仍存在很大差距;针对主要机构及作者进行分析表明,机构、作者间的关联线比较密集;高频被引文献分析发现,绵羊繁殖周期的研究与营养需求和生理调节二者之间的关系密切;对关键词检索进行分析表明,与绵羊繁殖周期研究相关的高频热点词汇共有25个,在不同时间段,有一部分词汇会重复出现。通过以上分析,有利于加深研究前沿及成果的相互借鉴,提高绵羊养殖的效益产出,为提高我国绵羊繁殖性能提供参考和理论依据。

关键词：绵羊繁殖周期 CiteSpace 知识图谱 Web of Science

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固定式橡胶自动割胶机的设计与试验

西南大学学报（自然科学版） 2024年第3期46卷 92-102页

作者：曾山武玉金曾丰毅于开鑫马立刚杨文武华南农业大学工程学院/南方农业机械与装备关键技术教育部重点实验室广州510642

针对目前传统人工割胶劳动强度大、胶工短缺、尚无成熟自动割胶工具的问题,结合割胶的技术要求和行业标准,设计了一种固定式橡胶自动割胶机.采用SolidWorks三维软件对整机结构进行建模与装配,并对其工作原理进行了阐述.设计了橡胶自动... 详细信息

针对目前传统人工割胶劳动强度大、胶工短缺、尚无成熟自动割胶工具的问题,结合割胶的技术要求和行业标准,设计了一种固定式橡胶自动割胶机.采用SolidWorks三维软件对整机结构进行建模与装配,并对其工作原理进行了阐述.设计了橡胶自动割胶机的关键机构,重点对割胶刀进行了分析.进行了林间试验,以切割深度、耗皮厚度和割线螺旋角为因素,以割胶后5 min排胶量为评价指标,设置3因素3水平正交试验.试验结果表明,固定式橡胶自动割胶机的最优工作参数为切割深度8 mm、耗皮厚度1.5 mm、割线螺旋角27.5°,在最优工作参数下割胶后5 min胶乳的产量为9.3 mL.

关键词：天然橡胶割胶机固定式结构设计试验

Effects of water on CO catalytic oxidation over Pd/CeO2

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Journal of Rare Earths 2020年第8期38卷 891-898,I0003页

作者： Shaofei Song Cheng Zhang Yake Lou yujin wu Li Wang Yanglong Guo Wangcheng Zhan Yun Guo Key Lab for Advanced Material Laboratory for Research Institute of Industrial CatalysisSchool of Chemistry&Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

The role of water in CO oxidation was investigated on Pd/CeO2 with different morphologies(rods(R),cubes(C)and octahedrons(O)).Compared with the absence of water,CO oxidation activity increases 2 times in the presence of water on Pd/CeO2-C;but a decrease is found on Pd/*** characterization reveals that Pd is mainly in the form of solid solution(PdxCe1-xO2-σ)on Pd/CeO2-R and a mixture of metal and PdxCe1-xO2-σsolid solution on Pd/*** strong interaction between Pd and CeO2-R results in the form of stable bidentate carbonates species;while the relatively weak interaction between Pd and CeO2-C leads to the produce of unstable monodentate carbonates *** effects of water on CO oxidation activity closely relate with the Pd chemical state and the types of carbonates *** restrains CO adsorption on PdxCe1-xO2-σsolid solution,but it has negligent effects on metallic Pd *** the presence of water,bidentate carbonates species remains stable but the decrease in the amount of monodentate carbonates species is observed.

关键词： CO oxidation Pd catalyst Support morphology Water Rare earths

Genome-wide alternative splicing variation and its potential contribution to maize immature-ear heterosis

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The Crop Journal 2021年第2期9卷 476-486页

作者： Xiaojiao Hu Hongwu Wang Kun Li Xiaogang Liu Zhifang Liu yujin wu Shuqiang Li Changling Huang National Engineer Laboratory of Crop Molecular Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Heterosis is a well-known phenomenon widely applied in *** studies have suggested that differential gene and protein expression between hybrids and their parents play important roles in *** splicing(AS)is an essential posttranscriptional mechanism that can greatly affect the transcriptome and proteome diversity in ***,genome-wide AS divergence in hybrids compared to their parents and its potential contribution to heterosis have not been comprehensively *** report the direct profiling of the AS landscape using RNA sequencing data from immature ears of the maize hybrid ZD808 and its parents NG5 and *** results revealed a large number of significant differential AS(DAS)events in ZD808 relative to its parents,which can be further classified into parental-dominant and novel DAS ***-dominant,especially NG5-dominant,events were prevalent in the hybrid,accounting for 42%of all analyzed DAS *** enrichment analysis revealed that the NG5-dominant AS events were involved mainly in regulating the expression of genes associated with carbon/nitrogen metabolism and cell division processes and contributed greatly to maize ear *** ZD808,CL11,and NG5,32.5%of DAS contained or lacked binding sites of at least one annotated maize microRNA(miRNA)and may be involved in miRNA-mediated posttranscriptional *** regulation was the predominant contributor to AS variation and participates in many important biological processes associated with immature ear *** study provides a comprehensive view of genome-wide alternative splicing variation in a maize hybrid.

关键词： Maize Heterosis Dominant alternative splicing Cis-regulation

Genetic analysis and QTL mapping of stalk cell wall components and digestibility in maize recombinant inbred lines from B73 × By804

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The Crop Journal 2020年第1期8卷 132-139页

作者： Qi Wang Kun Li Xiaojiao Hu Huimin Shi Zhifang Liu yujin wu Hongwu Wang Changling Huang National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijingChina National Engineering Laboratory for Crop Molecular Breeding BeijingChina

The cell wall composition and structure of the maize stalk directly affects its digestibility and in turn its feed *** studies of stem quality have focused mostly on common maize germplasm,and few studies have focused on high-oil cultivars with high grain and straw *** of the genetic basis of cell wall composition and digestibility of maize stalk using high-oil maize is desirable for improving maize forage *** the present study,a high-oil inbred line(By804)was crossed as male parent with the maize inbred line B73 to construct a population of 188 recombinant inbred lines(RILs).The phenotypes of six cell-wall-related traits were recorded,and QTL analysis was performed with a genetic map constructed with SNP *** traits were significantly correlated with one another and showed high broad-sense *** 20 QTLs mapped,the QTL associated with each trait explained 10.0%–41.1%of phenotypic *** half of the QTL each explained over 10%of the phenotypic *** results provide a theoretical basis for improving maize forage quality by marker-assisted selection.

关键词： Maize QTL Cell wall Digestibility Recombinant inbred lines

QTL analysis of ear leaf traits in maize(Zea mays L.)under different planting densities

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The Crop Journal 2017年第5期5卷 387-395页

作者： Hongwu Wang Qianjin Liang Kun Li Xiaojiao Hu yujin wu Hui Wang Zhifang Liu Changling Huang Institute of Crop Science Chinese Academy of Agricultural Sciences

Modem maize varieties have become more productive than ever, owing largely to increased tolerance of high plant density. However, the genetics of ear leaf traits under different densities remains poorly understood. In this study, Zhongdan 909 recombinant inbred lines(RILs) derived from a cross between Z58 and HD568 were genotyped for 3072 single-nucleotide polymorphisms(SNPs), and phenotyped for leaf length(LL), leaf width(LW), and leaf angle(LA) of the uppermost ear leaf under three planting densities(52,500,67,500, and 82,500 plants ha-1, respectively). A genetic map was then constructed using1358 high-quality SNPs. The total length of the linkage map was 1985.2 cM and the average interval between adjacent markers 1.46 cM. With increasing density, LL and LW decreased from 63.68 to 63.02 cm and from 8.56 to 8.21 cm, respectively, while LA increased from19.42° to 19.66°. All three traits had high heritabilities, of 0.75, 0.78, and 0.84, *** inclusive composite interval mapping, 23, 25, and 17 quantitative trait loci(QTL) were detected for LL, LW, and LA, respectively. Of these, 35 were simultaneously detected under two or three plant densities, while 30 were detected under only one. Sixty-five individual QTL explained 2.41% to 16.53% of phenotypic variation, while eight accounted for >10%.These findings will help us understand the genetic basis of leaf traits in maize as well as the response of maize to increased plant density.

关键词： Maize Quantitative trait loci Leaf traits Density treatment

Design and fabrication of sub-μs silicon-on-insulator thermo-optic 4×4 switch matrix

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Optoelectronics Letters 2007年第4期3卷 241-242页

作者： LIYun-tao yujin-zhong CHENShao-wu LIYan-ping CHENYuan-yuan StateKeyLaboratoryofIntegratedOptoelectronics InstituteofSemiconductorChineseAcademyofSciencesBeijing100083China

A rearrangeable nonblocking silicon-on-insulator-based thermo-optic 4x4 switch matrix with spot size converters （SSCs） and a new driving circuit are designed and fabricated. The introduction of a spot size converter （SSC） has decreased the insertion loss to less than 10dB and the new driving circuit has improved the response speed to less than l^s.

关键词：开关矩阵绝缘子束点转换器硅元素