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Data Acquisition and Processing of Electronic Compass for Mobile Robot Autonomous Navigation

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Data Acquisition and Processing of Electronic Compass for Mo...

2011年全国电子信息技术与应用学术会议

作者： Miaolei ZHOU 1,Yimu GUO 2 1 department of control science and engineering,Jilin University,Changchun,china 2 department of electrical engineering,Changchun University of Science and Technology,Changchun,china

Electronic compass is a kind of absolute sensor that can measure the azimuth by use of the earth’s magnetic *** compass is widely applied in mobile robot autonomous *** electronic compass applied to a certain kind of out-door mobile robot is introduced in this *** format of electronic compass is *** acquisition method in Linux operating system is presented in *** results show that the proposed method can obtain stable angle data,can meet the navigation demand of outdoor autonomous mobile robot.

关键词： electronic compass data acquisition USB communication robot

利用微波等离子体增强化学气相沉积法定向生长纳米碳管的研究

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物理学报 2004年第3期53卷 888-890页

作者：王淼李振华竹川仁士齐藤弥八浙江大学物理系杭州310027 浙江大学力学系杭州310027 日本三重大学工学部津5148507

利用微波等离子体增强化学气相沉积法在氢气和甲烷的混合气体中定向生长纳米碳管 .经扫描电子显微镜观察与分析 ,发现纳米碳管在与基板垂直的方向上整齐排列。

关键词：纳米碳管微波等离子体增强化学气相沉积法定向生长扫描电子显微镜薄膜生长

The High Performance Controller Design for Networked Control Systems with Multi-packet Transmission

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The High Performance Controller Design for Networked Control...

第二十七届中国控制会议

作者： Yang Li 2,Guan Xinping 1,Luo Xiaoyuan 2,Ye Caihong 2 1.department of electrical engineering Yanshan University,Qinhuangdao 066004,P.R.china 2.department of electrical engineering Yanshan University,Qinhuangdao 066004,P.R.china

This paper presents the model of Multiple-Packet Transmission Networked Control System（MNCS） with simulta-neous consideration of data packet dropouts and *** relationship between quantization error and the communi-cation rate is *** we propose the high performance controller design architecture for the MNCS,by exploiting the method of Generalized Internal Model *** shall call our architecture as Networked Internal Model Control（NIMC）,which can overcome the conflict between system performance and network *** an illustrative example is pro-vided to show the advantage and applicability of the developed method for network-based controller design.

关键词： Multiple-Packet transmission Networked Control System Quantization Packet dropout Networked Internal Model Control

Workflow Access Control Model TURBAC and Dynamic User Assigned Policies

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Workflow Access Control Model TURBAC and Dynamic User Assign...

2011 IEEE International Conference on Information Theory and Information Security(ICITIS 2011)

作者： Yali Yun 1) Yaping Li 1) Hongmei Chen 2) 1) department of Computer and Information engineering Luoyang Institute of Science and Technology Luoyang china 2) department of electrical engineering and Automation Luoyang Institute of Science and Technology Luoyang china

Access control and authorization management in workflow environment is a challenging *** present the task-user-role-based access control （TURBAC） model for workflow,integrating the concepts of extended role-based access control （ERBAC） and task-based access control （TBAC） with some *** also design the User assigned policies on tasks for the model by introducing the load equilibrium of users based on the user’s busy factor and task assigned dependency,*** improve the authentication mechanism for workflow environment and its executing efficiency.

关键词： user assigned busy factor task assigned dependency access control authorization

氮化铝单晶薄膜的ECR-PEMOCVD低温生长研究

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物理学报 2003年第5期52卷 1240-1244页

作者：秦福文顾彪徐茵杨大智大连理工大学三束材料表面改性国家重点实验室大连理工大学材料科学与工程系大连116024

采用电子回旋共振等离子体增强金属有机物化学气相沉积 (ECR -PEMOCVD)技术 ,在c轴取向的蓝宝石即α Al2 O3( 0 0 0 1)衬底上 ,以氮化镓 (GaN)缓冲层和外延层作为初始层 ,分别以高纯氮气 (N2 )和三甲基铝 (TMAl)为氮源和铝源低温生长氮... 详细信息

采用电子回旋共振等离子体增强金属有机物化学气相沉积 (ECR -PEMOCVD)技术 ,在c轴取向的蓝宝石即α Al2 O3( 0 0 0 1)衬底上 ,以氮化镓 (GaN)缓冲层和外延层作为初始层 ,分别以高纯氮气 (N2 )和三甲基铝 (TMAl)为氮源和铝源低温生长氮化铝 (AlN)薄膜 .并利用反射高能电子衍射 (RHEED)、原子力显微镜 (AFM)和x射线衍射 (XRD)等测量结果 ,研究了氢等离子体清洗、氮化和GaN初始层对六方AlN外延层质量的影响 ,从而获得解理性与α Al2 O3衬底一致的六方相AlN单晶薄膜 ,其XRD半高宽为

关键词：氮化铝单晶薄膜 ECR-PEMOCVD 低温生长电子回旋共振等离子体增强金属有机物化学气相沉积半导体材料 AlN薄膜

Pure-phase Apodizer for generating double ring-shaped focuses

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Pure-phase Apodizer for generating double ring-shaped focuse...

中国光学学会2011年学术大会

作者： Jiannong Chen,1* Qinfeng Xu,1 Gang Wang 2 1 department of Physics,Ludong University,Yantai,264025,china 2 department of Electronic and electrical engineering,Ludong University,Yantai,264025,china

We propose two design methods of concentric multi-belt pure phase apodizer and phase modulation functions for generating two ring-shaped focuses by focusing the linearly polarized doughnut-shaped beam with a high numerical aperture *** phase modulation functions for odd and even belt are verified effective by numerical *** distance of the two focuses and the position of each focus can be controlled or separately *** could be useful in optical trapping,particle stacking,alignment and transportation.

关键词：

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汉语语音识别中基频特征的直接声学建模方法

计算机工程与应用 2009年第30期45卷 132-134,164页

作者：黄浩哈力旦新疆大学信息科学与工程学院乌鲁木齐830046 新疆大学电气工程学院乌鲁木齐830046

提出了隐条件随机场对断续基音频率序列进行直接声学建模的方法,该方法针对汉语语音中基频值在清音段连续,浊音段断续的特点,根据隐条件随机场区别于隐马尔可夫模型的重要特性——无需对观察值采用统一的建模方式,直接对不连续基频值与... 详细信息

提出了隐条件随机场对断续基音频率序列进行直接声学建模的方法,该方法针对汉语语音中基频值在清音段连续,浊音段断续的特点,根据隐条件随机场区别于隐马尔可夫模型的重要特性——无需对观察值采用统一的建模方式,直接对不连续基频值与连续谱特征观察值一起进行声学建模。大词汇语音库上的汉语带调音节分类实验表明,隐条件随机场下对断续基音频率序列的直接建模较使用清音段人工平滑基频特征的识别率有明显的提高,还给出了与不同区分性准则训练的隐马尔可夫声学模型的实验性能的比较。

关键词：隐条件随机场汉语语音识别声学模型

Research on Improved Genetic Algorithm for Low-dimensional and Multimodal Function Optimization

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Research on Improved Genetic Algorithm for Low-dimensional a...

2011 Chinese Control and Decision Conference（CCDC）

作者： Liqing Xiao1,2,Huaxiang Wang1,Xiaoju Xu2 1.School of electrical engineering & Automation,Tianjin University,Nankai District,Tianjin 300072,china 2.department of Information & electrical engineering,Xuzhou Institute of Technology,Xuzhou Jiangsu 221111,china

In order to overcome the disadvantages that simple genetic algorithm had in low-dimensional and multimodal function optimization,an improved algorithm was *** new algorithm divided the search interval into different areas by method of orthogonal decomposition,produced initial populations that had different individual distribution density by using interval algorithm,and gave each individual an attribute that marked the area which it was in and guaranteed there was more than one individual in each area during the operating process of the *** swarm algorithm was introduced to the mutation operation of genetic algorithm to overcome the shortage of genetic algorithm,that was,the poor search ability in local areas,especially those that had low individual distribution *** applied to six-hump camel back function and Branin RCOS function optimization,the simulation results show that,under the same experiment condition,in contrast to other improved algorithms,the new one improves the probability of searching to all extreme points,and has stronger ability of low-dimensional multi-modal function optimization,on the premise that the convergence precision is not affected.

关键词： Genetic Algorithm Interval Algorithm Particle Swarm Algorithm Six-hump Camel Back Function Branin RCOS Function

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光纤有源内腔激光传感网络技术

中国激光 2003年第2期30卷 154-158页

作者：喻洪波廖延彪赖淑蓉靳伟施纯峥何海律清华大学电子工程系北京100084 香港理工大学电机系

提出了一种新的光纤气体传感网络的有源复用系统 ,将锁模激光技术与光纤环形内腔激光气体传感技术相结合 ,提出并实现一套以锁模光纤环形腔激光器为复用基础的光纤内腔激光气体传感网络系统。

关键词：传感器激光光谱分析光纤传感器光纤锁模激光器光纤传感网络复用技术