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A New Descriptor for 3D Trajectory Recognition

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A New Descriptor for 3D Trajectory Recognition

第九届运筹学及其应用国际研讨会

作者： J.y.yang y.f.li MEEM of Joint Advanced Research Centre of City University and USTC MEEM of City University Hong Kong

Motion trajectory contains plentiful of motion information which is useful for motion analysis in many tasks. Motion recognition via trajectory is important in motion analysis for many human and robotic tasks. An effective descriptor for motion trajectories plays an important role in the recognition algorithm. In this paper, we propose a new descriptor with a modified data alignment method for motion trajectory recognition. Experimental results demonstrate the effectiveness of our method.

关键词： Invariant Signature Trajectory Descriptor Motion Recognition Robot Vision

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虚拟触觉传感器的仿真模型研究

机器人 2000年第4期22卷 260-263页

作者：赵春霞盛安冬杨静宇王树国蔡鹤皋 y.f.li 南京理工大学计算机系南京210094 南京理工大学自动化系南京210094 哈尔滨工业大学机器人研究所哈尔滨150001 香港城市大学制造工程与工程管理学系

本文根据真实触觉传感器的原理 ,对虚拟触觉传感器的仿真模型进行了研究 ,以便在机器人手抓拾取操作中揭示与材料特性相关的触觉信息瞬态特性 ,进而为在虚拟环境中从事基于传感信息的机器人柔性操作。

关键词：虚拟触觉传感器仿真模型机器人

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Agent任务可视编程和单元组合重构

计算机研究与发展 2000年第1期37卷 122-128页

作者：赵春霞王树国蔡鹤皋杨静宇 y.f.li 南京理工大学计算机系南京210094 哈尔滨工业大学机器人研究所哈尔滨150001 香港城市大学制造工程与工程管理学系

文中将机器人装配单元的各类设备定义为独立的Ａｇｅｎｔ，采用ＰｅｔｒｉＮｅｔ模型，为各Ａｇｅｎｔ的作业定义了有关操作的基本模型结构，作为基于多Ａｇｅｎｔ的模型库．通过对Ａｇｅｎｔ模型库元素的可视化组合重构，不仅可以实现... 详细信息

文中将机器人装配单元的各类设备定义为独立的Ａｇｅｎｔ，采用ＰｅｔｒｉＮｅｔ模型，为各Ａｇｅｎｔ的作业定义了有关操作的基本模型结构，作为基于多Ａｇｅｎｔ的模型库．通过对Ａｇｅｎｔ模型库元素的可视化组合重构，不仅可以实现机器人作业单元几何元素的重组，而且可以方便地实现作业任务的重组．文中提出的基于层次化节点及节点槽结构，实现了对可视基元的分类管理和组织，解决了可视图符与操作任务间的映射问题，可为用户提供基于直接操作的可视化任务程序制作界面．通过采用基于面向目标层次化可视基元的可视交互流程导引，定义了Ａｇｅｎｔ间的作业关系，最终完成对于用户单元组合布置与重构过程的导航。

关键词：机器人 Agent 可视编程组合重构

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虚拟传感器的建模与实现

机器人 2000年第2期22卷 154-160页

作者：赵春霞盛安冬杨静宇 y.f.li 王树国蔡鹤皋南京理工大学计算机系南京210094 南京理工大学自动控制系南京210094 香港城市大学制造工程与工程管理学系哈尔滨工业大学机器人研究所哈尔滨150001

本文根据真实力触觉传感器的原理 ,研究并构造了虚拟目标锁定跟踪显示器、虚拟距离传感器 ,用于在虚拟环境中从事基于传感信息的机器人柔性操作。

关键词：机器人传感器传真虚拟传感器建模

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基于多AGENT的分布式操作臂控制

机器人 2000年第5期22卷 402-409页

作者：赵春霞盛安冬杨静宇王树国蔡鹤皋 y.f.li 南京理工大学计算机系南京理工大学自动化系哈工大机器人研究所哈尔滨150001 香港城市大学制造工程与工程管理学系

大部分传统的机器人控制方法依赖于一精确模型 .随着机器人的日趋复杂 ,此类方法已受到种种限制 .本文在借鉴国际最新研究成果的基础上 ,提出了一种新的操作臂控制算法 .算法继承了多 Agent的思想 ,易于实现并行运算 ;吸收了增量定向运... 详细信息

大部分传统的机器人控制方法依赖于一精确模型 .随着机器人的日趋复杂 ,此类方法已受到种种限制 .本文在借鉴国际最新研究成果的基础上 ,提出了一种新的操作臂控制算法 .算法继承了多 Agent的思想 ,易于实现并行运算 ;吸收了增量定向运动学思想的优点 ,使运算相对简单 .算法采用使操作臂末端点与目标点间距离单调减小的控制策略 ,并推导出了相应的非迭代公式 .针对基于多Agent的操作臂控制算法中存在的问题 ,本算法消除了初始阶段运动轨迹出现的振荡现象 ,从根本上避免了迭代算法带来的收敛速度问题 .

关键词：机器人操作臂控制 Agent

Effects of polyamines on Agronomic Traits and Photosynthetic Physiology of Wheat under High Temperature Stress

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Effects of polyamines on Agronomic Traits and Photosynthetic...

第十届全国小麦基因组学及分子育种大会

作者： J.G.JING S.y.GUO y.f.li W.H.li Key Laboratory of Oasis Eco-Agriculture Xinjiang Production and Construction GroupShihezi University

Two spring wheat varieties were used to study the alleviating effects of exogenous spermine(Spm) and spermidine(Spd) on agronomic traits and photosynthetic physiology under high temperature treatment(HT).The results showed that HT significantly decreased grain mass per panicle of XC 6(heat-resistant variety)by 25% and XC 31(heat-sensitive variety) by 32%;After HT,i.e.,at 13 day after flowering,the decrease in net photosynthetic rate of XC 6(38%) was lower than that of XC 31(53%),the reason for this was related to XC 6 could maintain correspondingly normal chlorophyll content(Chl),stomatal conductance(g),transpiration rate(E) and intercellular CO *** Spm and Spd could increase relative water content,Chl,g,E,the maximal quantum yield of PSII photochemistry,effective quantum yield of PSII photochemistry,antenna conversion efficiency and photochemical quenching coefficient of flag leaves under *** results indicated that the heat resistance of XC 6 is better than that of XC 31 and exogenous Spm and Spd could alleviate the heat injury of photosynthetic physiology of wheat flag leaves

关键词： chlorophyll fluorescence parameters heat stress gas exchange grain filling period photosynthetic characteristics

Plasma Processed Carbon Nanotubes for Infrared Solar Cell Application

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Plasma Processed Carbon Nanotubes for Infrared Solar Cell Ap...

第三届微电子及等离子体技术国际会议

作者： y.f.li S.Kodama T.Kaneko R.Hatakeyama Department of Electronic Engineering Tohoku UniversitySendai 980-8579Japan

Single-walled carbon nanotubes（SWNTs） are quasi one-dimensional materials exhibiting interesting optical properties,which makes them promising candidates for fabrication of solar *** this work,the functionalized SWNTs via C60 fullerene encapsulation are synthesized by an ion irradiation *** encapsulation of C60 inside SWNTs（C60@SWNTs） has been confirmed by transmission electron microscopy and Raman *** possibility of making infrared solar cells based on such functionalized SWNTs and n-type silicon is systematically *** is found that C60@SWNTs show a promising potential as energy conversion material which can be used to convert the infrared light（800-1550 nm） into the electrical energy [1].The solar cells based on C60@SWNTs are found to yield a better power conversion efficiency than pristine SWNTs due to the charge transfer effect between SWNTs and C60 ***,the open-circuit voltage of the infrared solar cells is further improved by using C60 encapsulated semiconducting SWNTs compared with that of C60@SWNTs containing both metallic and semiconducting SWNTs [2].

关键词： Plasma Ion Irradiation Carbon Nanotubes Solar cell

ECO-ECONOMIC THRESHOLD PERIOD Of WEED CONTROL IN RAPE Of JIANGSU PROVINCE

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ECO-ECONOMIC THRESHOLD PERIOD OF WEED CONTROL IN RAPE OF JIA...

The 18th Asian-Pacific Weed Science Society Conference

作者： Q.f.Lou y.f.li y.W.li K.H.Huang H.C.Zhou Modernization Institute of Jiangsu Academy of Agricultural Sciences Agriculture Co.of

field experiments were conducted at two locations in Jiangsu to study the functional relationships between the weedy or weed-free days and the yield loss rate of rape, determine the eco-economic threshold period of weed control in rape *** results indicated that the relation between the weedy days(x) after transplanting and the yield

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The spatio-temporal changes of coastal vegetation using two different management practices in yancheng National Nature Reserve,China

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The spatio-temporal changes of coastal vegetation using two ...

中国自然资源学会2012学术年会

作者： y.f.li H.y.liu H.B.Zhang M.H.Hou Jiangsu Key Laboratory of Environmental Change and Ecological Construction College of Geographical ScienceNanjing Normal University

This paper presents a landscape analysis of vegetation changes in the core zone of yancheng National Nature Reserve（yNNR） using remote sensing and geographical information systems（GIS） technology from 1993 to *** core zone of yNNR was divided into an ecological engineering zone and a natural succession *** results revealed that the area of yNNR increased by 226.84 km between 1993 and *** increase in the number of square kilometers in the ecological engineering zone was fewer than that in the natural succession *** rate of sedimentation along the coast increased faster between 1993 and 2002 than between2002 and *** components in the ecological engineering zone and the natural succession zone were significantly *** was consistently the main vegetation cover type in the ecological engineering zone;dominant species of Suaeda were gradually replaced by reeds and Spartina in the natural succession *** change in vegetation in different administrative zones showed dissimilar *** cover increased in the natural succession zone but significantly decreased in the ecological engineering *** land and Suaeda land showed rapid loss in both *** in the centroid lines of different vegetation moved east regularly in the natural succession zone,but moved in disorder in the ecological engineering *** results of this study provide basic information that will inform subsequent research and will support decision-making for the sustainable management and conservation of the yNNR.

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