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Stabilization for A Collection of Feedback Linearizable Systems

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Stabilization for A Collection of Feedback Linearizable Syst...

2009中国控制与决策会议

作者： Xiushan Cai,Lihua Lin Rong Lin Shaoqing Su,Pingfan Dai, Department of Mathematics and Computer Science,sanming College,sanming,365004

＜正＞Stabilization for a collection of feedback linearizable systems with uncertain parameter is dealt with in this *** and sufficient conditions for a quadratic control Lyapunov function to be a common control Lyapunov function for these systems are obtained.A continuous state feedback control is designed based on the common control Lyapunov *** can simultaneously stabilize these ***,the effectiveness of the proposed scheme is illustrated by a simulation example.

关键词： nonlinear systems stabilization control Lyapunov function state feedback

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关于模糊粗糙集的相似度量

计算机工程与应用 2004年第9期40卷 58-59,68页

作者：张诚一卢昌荆海南师范学院计算机系海口571158 福建省三明高等专科学校计算机系福建三明365000

基于对不确定性信息处理的背景,定义了模糊粗糙值与模糊粗糙集的相似度量,研究了它们的有关性质。

关键词：模糊集粗糙集模糊粗糙集相似度量

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土钉支护在扩建工程软土基坑中的应用

施工技术 2002年第1期31卷 12-13页

作者：顾祖炎三明市建筑设计院福建三明365001

通过工程实例着重阐述了旧房扩建工程的基坑土钉支护设计方法及其应注意的问题 ,实践表明土钉支护确保了旧建筑地基土体稳定 ,有效地控制了基坑侧壁的位移 ,对周边环境影响很小。

关键词：土钉支护稳定性地基承载力办公楼扩建工程

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乐果农药包装女工肺功能调查

中国职业医学 2002年第1期29卷 39-40页

作者：林潮徐健三明市职业病防治院福建三明365000

目的　了解有机磷农药对包装女工肺功能的影响。方法　对某农药厂 63名乐果包装女工进行班前、班后肺功能调查 ,同时进行空气中乐果浓度和女工全血胆碱酯酶测定。结果　①包装女工胸闷、胸部紧束感明显高于对照组 ;②包装女工班后肺功... 详细信息

目的　了解有机磷农药对包装女工肺功能的影响。方法　对某农药厂 63名乐果包装女工进行班前、班后肺功能调查 ,同时进行空气中乐果浓度和女工全血胆碱酯酶测定。结果　①包装女工胸闷、胸部紧束感明显高于对照组 ;②包装女工班后肺功能较班前明显下降 ,FEV1%班后异常率比班前明显增高 ;③大于 6年工龄的包装女工班后肺功能较班前明显下降 ;④包装女工班前、班后肺功能差值与年龄、工龄和全血胆碱酯酶呈正相关 ,而工龄与全血胆碱酯酶呈负相关。

关键词：有机磷农药乐果肺功能农药中毒调查

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用盐酸从矿泥中浸出稀土的动力学控制分析

稀土 2003年第6期24卷 16-19页

作者：戈芳池汝安三明高等专科学校化学生物工程系福建三明365004 epartment of Chemical and Materials Engineering University of Alberta

某风化矿泥含稀土在2%～5%,且稀土以氧化物形式存在于矿泥中。用盐酸加热浸取可将稀土浸出,转化为氯化稀土,再用草酸沉淀回收稀土。分析了盐酸浸出稀土的条件和动力学,其速率常数k=(760+0.64×1/ro2)exp(-10500/RT),表观活化能为10.5kJ/... 详细信息

某风化矿泥含稀土在2%～5%,且稀土以氧化物形式存在于矿泥中。用盐酸加热浸取可将稀土浸出,转化为氯化稀土,再用草酸沉淀回收稀土。分析了盐酸浸出稀土的条件和动力学,其速率常数k=(760+0.64×1/ro2)exp(-10500/RT),表观活化能为10.5kJ/mol,是一个典型的内扩散控制过程。温度越高,矿泥粒度越细,越有利于稀土的回收。

关键词：风化矿泥盐酸浸出稀土动力学

Synthesis and characterization of a novel Au nanocatalyst with increased thermal stability

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Synthesis and characterization of a novel Au nanocatalyst wi...

第十四届全国青年催化学术会议

作者： Yiwei Zhang Yuming Zhou Zewu Zhang sanming Xiang School of Chemistry and Chemical Engineering Southeast University

＜正＞Synthesis of Au nanocatalysts with high thermal stability is in high demand [1]. Recently, several investigations have been carried out to improve the thermal stability of metal nanocatalysts [2-3]. It is known that the surface encapsulation of metal nanoparticles with mesoporous materials [4], typically silica, may be an effective way to

关键词： Au nanocatalyst Thermal stability Catalytic structure

Global plate motion and earthquake activity

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Geodesy and Geodynamics 2010年第1期1卷 1-7页

作者： Yanxing Li Xiwu Luan Yuanzhong Lu Jinghua Zhang Hong Liu sanming Luo Feng Liu First Crust Monitoring and Application Center China Earthquake Administration Tianfin 300180 China Institute of Oceanology Chinese Academy of Sciences Qingdao 266003 China Institute of Crustal Dynamics China Earthquake Administration Beijing 100085 China

The global plate motion rates Ω are not uniform in time and space. The rotation rates were larger than 0. 545°/Ma for Cocos, Philippine Sea, Pacific, Nazca, Australia, India and Arabia plates, but smaller than 0. 315°/Ma. for other plates. Compared to 1997. 0, the Ω values of the three oceanic plates in 2000. 0 increased by,respectively,2.4% ,2. 1% and 41.7%, and the northward movement rates of the the India plate and western part of the Australia plate increased by 3.38 mm/a on the average. The spatial distribution of earthquakes was dependent on earthquake magnitude. Earthquakes of 5.0 ≤ Mw 〈 7.0 were located mainly in plate-margin zones and intra-plate crustal deformation zones joining the southern margin of Eurasia plate. Earthquakes of Mw≥7.0 concentrated basically in the circum-Pacific and South Asia zones, but hardly in midocean-ridge seismic zones. Earthquakes of Mw ≥ 8.0 were located only in the margin zones of the India, Aus- tralia,Pacific and Nazca plates orthogonal to the direction of plate motion. Compared with previous eighteen years, global earthquake activity enhanced obviously after 1994, especially after 2001. The Ω value of a plate was closely related to the activity of strong earthquakes. The largest earthquakes were located in the front-margin zones of plates having the largest Ω values. Energy released by strong earthquakes comes mainly from kinetic energy of the plates. Global seismicity enhancement was caused mainly by the acceleration of the three oceanic plates. Larger enhancement of global earthquake activity lagged behind the movement acceleration of the three oceanic plates by four years.

关键词： plate motion acceleration global seismicity enhancement GPS

Scan Registration for Mechanical Scanning Imaging Sonar Using kD2D-NDT

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Scan Registration for Mechanical Scanning Imaging Sonar Usin...

第30届中国控制与决策会议

作者： Min Jiang sanming Song Yiping Li Jian Liu Xisheng Feng State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences university of Chinese Academy of Sciences

A method derived from the D2 D-NDT, named k D2 D-NDT, is proposed to register the scans that are collected by the Mechanical Scanning Imaging Sonar（MSIS）. The D2 D-NDT method replaces the point-to-distribution（P2 D）scoring in the normal distribution transformation（NDT） with distribution-to-distribution（D2 D） matching, greatly reducing the computation cost. In this paper, several heuristic strategies are adopted in k D2 D-NDT to accelerate and stabilize the matching process. Firstly, the point cloud of the floating scan and the reference scan are grouped into compact clusters by the K-means clustering method to accommodate the Gaussian mixture model assumption which underlies the D2 D distance measure and no iterative optimization at different grid size is needed. Secondly, for each Gaussian component in the floating scan, only k = 3 nearest Gaussian components in the reference scan are chosen to measure the ***, to avoid the singularity in calculating the matrix inverse, the Euclidean distance between the centroid pair, instead of the Mahalanobis distance, is adopted to find the most similar Gaussian components. Its applications to the scans that are collected from the realistic underwater environment show that the proposed strategies make k D2 D-NDT practical for the MSIS scans.

关键词： scan registration kD2D-NDT mechanical scanning imaging sonar