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2012 International Conference on Systems and Informatics (ICSAI2012)最新文献

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Mobile landmark guide system based on LOD and SURF 基于LOD和SURF的移动地标导航系统
Pub Date : 2012-05-19 DOI: 10.1109/ICSAI.2012.6223134
Bingjie Zhao, Kee-Sung Lee, A. N. Rosli, Chol-Hee Jang, Geun-Sik Jo
In this paper, we present a mobile collaborative outdoor augmented reality system. The system will provide a user who captures image of a building facade with related introduction. The proposed system mainly consists of two major parts - annotation module and AR browsing module. Annotation module works with existing standards and linked data to allow users create annotations of the building. Annotation data in our system which only contains URI and metadata, such cluster ID, cluster centroid and the image feature vectors. When user using the system browsing the landmark in outdoor, the system first recognize the landmark and calculate the camera pose from the matching, and then the related introduction is retrieved from linked data through its URI. Experiments show that the proposed augmented reality system is efficient and robust in many cases.
本文提出了一种移动协同户外增强现实系统。该系统将为捕捉建筑物立面图像的用户提供相关介绍。本系统主要由标注模块和AR浏览模块两大部分组成。注释模块与现有标准和链接数据一起工作,允许用户创建建筑物的注释。系统中仅包含URI和元数据的标注数据,如簇ID、簇质心和图像特征向量。当用户使用该系统在户外浏览地标时,系统首先对地标进行识别,并根据匹配结果计算相机姿态,然后通过其URI从链接数据中检索相关介绍。实验结果表明,所提出的增强现实系统在许多情况下都是高效且鲁棒的。
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引用次数: 1
Integrated segmentation of noisy image based on the spatial relationship 基于空间关系的噪声图像综合分割
Pub Date : 2012-05-19 DOI: 10.1109/ICSAI.2012.6223469
T. Nguyen, Q. M. J. Wu
In this paper, we propose a new algorithm for an integrated image segmentation based on the combination of both Markov Random Fields (MRF) and Graph Cuts (GC). In the well-known GrabCut method, the T-link weights do not take into account the spatial relationship between the neighboring pixels. The proposed algorithm, unlike GrabCut method, incorporates this spatial relationship right into the T-link weights. The performance results obtained using natural images clearly demonstrate the robustness, accuracy and effectiveness of the proposed algorithm, as compared to other known methods.
本文提出了一种基于马尔可夫随机场(MRF)和图割(GC)相结合的图像分割算法。在众所周知的GrabCut方法中,T-link权重没有考虑相邻像素之间的空间关系。与GrabCut方法不同的是,该算法将这种空间关系直接纳入t链路权重中。与其他已知方法相比,使用自然图像获得的性能结果清楚地证明了该算法的鲁棒性、准确性和有效性。
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引用次数: 1
Influence of successive catch-up saccades on the accuracy of tracking eye movements 连续追赶扫视对追踪眼球运动准确性的影响
Pub Date : 2012-05-19 DOI: 10.1109/ICSAI.2012.6223503
V. Laurutis, R. Zemblys
Catch-up saccades and smooth pursuit are two components, quick and slow, of tracking eye movements. Their interaction has usually been studied during tracking a target moving only in the horizontal direction. In these experiments catch-up saccades were invoked by changing target velocity or introducing target jumps and occlusions. Our research was focused on ocular pursuit of two-dimensional non-predictive target trajectories without target jumps. Target trajectories presented to the subjects had the same shape but moved with slow, medium and high average speeds, and each trial had the duration of 60, 30 and 15 s, respectively. During the long tracking experiments, the sequences of successive catch-up saccades were obtained and their parameters were computed. Due to the contribution of catch-up saccades, elicited during ocular pursuit, the position errors and lagging times were reduced from 30 to 50 % and larger values were obtained for higher target velocities. Analyzing the sum of tracking distances which were overcome during slow phases and during catch-up saccades, we proposed new method to evaluate subject's pursuit gain.
追赶扫视和平滑追踪是眼球运动的两个组成部分,快速和缓慢。在跟踪只在水平方向运动的目标时,通常研究它们的相互作用。在这些实验中,追赶扫视通过改变目标速度或引入目标跳跃和遮挡来实现。我们的研究重点是无目标跳跃的二维非预测目标轨迹的视觉追踪。呈现给被试的目标轨迹形状相同,但平均运动速度分别为慢、中、高,每次试验的持续时间分别为60、30、15 s。在长时间跟踪实验中,获得了连续追赶扫视序列,并计算了其参数。由于眼球追踪过程中产生的追赶跳跳的作用,定位误差和滞后时间从30%减少到50%,目标速度越快,误差和滞后时间越长。通过分析慢速阶段和追赶扫视阶段所克服的跟踪距离之和,提出了一种新的目标跟踪增益评估方法。
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引用次数: 0
Analysis and applications of NDR characteristics in single-electron transistor 单电子晶体管NDR特性分析及应用
Pub Date : 2012-05-19 DOI: 10.1109/ICSAI.2012.6223174
Bingcai Sui, Xiaobao Chen, Liang Fang
Single Electron Tunneling Transistors (SETs) are promising for very large scale integrated circuits due to their ultra-low power consumption and ultra-small feature size scalability. Devices with NDR characteristics are very useful to be used to design amplifier, oscillation, memory and so on. As a three-port device, NDR characteristics of SET is very useful for VLSI. We analyse several NDR cells based on SETs mostly focused on recently. All the cells use coulomb oscillation to produce NDR characteristics, which can be used to design SRAM, multiple-valued logics, and so on. Therefore, it is very valuable to make research on the NDR characteristics of SETs.
单电子隧道晶体管(set)由于其超低功耗和超小的特征尺寸可扩展性,在超大规模集成电路中具有广阔的应用前景。具有NDR特性的器件在放大器、振荡器件、存储器等器件的设计中具有重要的应用价值。作为一种三端口器件,SET的NDR特性对超大规模集成电路非常有用。本文分析了近年来研究较多的几种基于set的NDR细胞。所有单元都使用库仑振荡产生NDR特性,可用于设计SRAM,多值逻辑等。因此,对set的NDR特性进行研究是非常有价值的。
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引用次数: 1
An adaptive fuzzy-neural control approach for vehicle lateral dynamics 车辆横向动力学的自适应模糊神经控制方法
Pub Date : 2012-05-19 DOI: 10.1109/ICSAI.2012.6223089
Chen-Sheng Ting, Chuan-Sheng Liu
This study addresses an adaptive backstepping fuzzy control approach for automatic steering vehicles. The vehicle lateral dynamics is presented by an eight degree-of-freedom model, which considers the nonlinear behaviors such as tire force, wheel rotations, forward velocity, and roll motion. According to the existing result, the analysis and design on this model is difficult to perform because of its model complexity. To facilitate the designing work, a robust control scheme which is based on T-S fuzzy control strategy is investigated. The stability condition for ensuring that the control system is uniformly ultimately bounded is derived based on Lyapunov's method. Finally, the effectiveness of the proposed approach is verified via numeric examples.
研究了自动转向车辆的自适应反步模糊控制方法。通过考虑轮胎力、车轮转动、前向速度和侧倾运动等非线性行为的八自由度横向动力学模型来描述车辆的横向动力学。根据已有的研究结果,由于该模型的复杂性,对其进行分析和设计比较困难。为了方便设计工作,研究了一种基于T-S模糊控制策略的鲁棒控制方案。基于李雅普诺夫方法,导出了保证控制系统一致最终有界的稳定条件。最后,通过数值算例验证了所提方法的有效性。
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引用次数: 1
Impact assessment of highway construction on ecological environment based on QuickBird images analysis 基于QuickBird图像分析的公路建设生态环境影响评价
Pub Date : 2012-05-19 DOI: 10.1109/ICSAI.2012.6223467
Xiaolei Yao, Jingshan Yu, Hua Li
Highway, as human made construction on land surface, has influence on natural environment in some geographical region. Ecological environment monitoring is fundamental for highway environmental protection, which is one of the main tasks of traffic environmental monitoring. Conventional methods of the ecological environment monitoring are time-consuming and are not feasible for large area monitoring. Assessment based on remote sensing and GIS can dynamically detect the impacts on ecological environment before and after highway construction. And it can also provide useful information for making decision about the strategy of highway environmental protection. In this study, an assessment based on analyzing Quick Bird image before and after construction period was carried out. After fusing multispectral and panchromatic Quick Bird images based on principal component analysis (PCA) and geometric correction using ERDAS software, the Normalized Difference Vegetation Index (NDVI) and Vegetation Coverage (VC) was computed from the fused image. By utilizing the eCognition software, land use classification was detected. The NDVI, VC and land use classification before and after construction was compared. The results indicate that the vegetation density, area of farmland and woodland are reduced, which is consistent with the results obtained from field survey.
公路作为人类在陆地上的人工建筑,对一定地理区域内的自然环境有一定的影响。生态环境监测是公路环境保护的基础,是交通环境监测的主要任务之一。传统的生态环境监测方法耗时长,不适合大面积监测。基于遥感和GIS的评价可以动态检测公路建设前后对生态环境的影响。并可为公路环境保护战略的制定提供有用的信息。本研究在分析Quick Bird施工前后图像的基础上进行了评价。利用ERDAS软件进行主成分分析(PCA)和几何校正,对多光谱和全色Quick Bird图像进行融合,计算归一化植被指数(NDVI)和植被覆盖度(VC)。利用ecrecognition软件进行土地利用分类检测。比较了建设前后NDVI、VC和土地利用分类。结果表明,植被密度、耕地和林地面积均有所减少,与野外调查结果一致。
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引用次数: 0
Optical correlation velocimetry: An aid to particle sizing by acoustic emission measurement 光学相关测速法:通过声发射测量来辅助粒度测定
Pub Date : 2012-05-19 DOI: 10.1109/ICSAI.2012.6223594
Chunyang Huang, Jiaqi Shen, Xiaoshu Cai
The particle size of a particle can be acquired through signal analysis of acoustic emission measurement from impact of the particles onto a plate, provided that the impacting velocity of the particles as well as some characteristic parameters of the powder material is prior known. The authors proposed optical correlation velocimetry as an aid to acoustic emission measurement. The measuring apparatus was built for simultaneous measurement of the acoustic emission signals from impact of free-falling particles onto a plate and optical correlation velocimetry. As shown by the test results, optical correlation velocimetry can provide essential information for acoustic emission signal analysis.
只要事先知道颗粒的撞击速度和粉末材料的一些特征参数,就可以通过对颗粒撞击板的声发射测量信号进行分析,得到颗粒的粒度。作者提出了光学相关测速法作为声发射测量的辅助手段。该测量装置用于同时测量自由落体粒子撞击平板的声发射信号和光学相关测速。实验结果表明,光学相关测速可以为声发射信号分析提供必要的信息。
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引用次数: 1
Multidimensional uncertain optimal control with jump 具有跳跃的多维不确定最优控制
Pub Date : 2012-05-19 DOI: 10.1109/ICSAI.2012.6223502
Liubao Deng, Yuanguo Zhu
Based on an uncertain optimal control problem with jump in the condition of one-dimension, in this paper, we shall consider an uncertain optimal control problem with jump in the condition of multi-dimension. To solve the proposed problem, we present the principle of optimality and then obtain the equation of optimality about multidimensional uncertain optimal control problem with n-jump.
在一维条件下具有跳跃的不确定最优控制问题的基础上,研究了一维条件下具有跳跃的不确定最优控制问题。为了解决所提出的问题,我们提出了最优性原理,得到了多维不确定n跳最优控制问题的最优性方程。
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引用次数: 1
A new motor fault detection method using multiple window S-method time-frequency analysis 提出了一种基于多窗口s法时频分析的电机故障检测新方法
Pub Date : 2012-05-19 DOI: 10.1109/ICSAI.2012.6223577
Desheng Liu, Yu Zhao, Beibei Yang, Jinping Sun
Fault signals of motors is non-stationary typically. Conventional Fourier transform method can't meet the demand of fault signals extraction. Time-frequency analysis (TFA) based motor fault diagnosis methods, which can identify rotor faults by detecting time-varying frequency components of stator current signals, have been very important signal processing techniques. This paper proposes a new motor fault detection method based on multiple window S-method TFA. Slepian sequences are applied as window functions. Compared with common short-time Fourier transform (STFT) and Wigner-Ville distribution (WVD), multiple window S-method TFA provides better time-frequency concentration and cross-term suppression performances, thus improving accuracy rate of motor rotor fault detection. Taking rotor dynamic eccentricity fault as an example, the validity of method is demonstrated.
电动机的故障信号通常是非平稳的。传统的傅里叶变换方法已不能满足故障信号提取的要求。基于时频分析(TFA)的电机故障诊断方法是一种非常重要的信号处理技术,它通过检测定子电流信号的时变频率成分来识别转子故障。提出了一种基于多窗口s法TFA的电机故障检测方法。睡眠序列作为窗函数应用。与常用的短时傅里叶变换(STFT)和Wigner-Ville分布(WVD)相比,多窗s法TFA具有更好的时频集中和交叉项抑制性能,从而提高了电机转子故障检测的准确率。以转子动态偏心故障为例,验证了该方法的有效性。
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引用次数: 13
Real-time landslide monitoring using close-range stereo image sequences analysis 利用近距离立体图像序列分析进行滑坡实时监测
Pub Date : 2012-05-19 DOI: 10.1109/ICSAI.2012.6223569
T. Feng, Xiangfeng Liu, M. Scaioni, Xiaofei Lin, Rongxing Li
Landslide is one of the major natural hazards, threatening human lives and properties. Real-time landslide monitoring is very important to disaster relief. In this paper, the effectiveness of real-time landslide monitoring method based on close-range photogrammetry is investigated in an on-campus landslide test site at Tongji University. Feature point tracking method using landslide image sequences is tested first, and then the elevation change detection method on the landslide surface is also tested. According to the experimental results, it is shown that both of these two methods can effectively monitor the landslide movements, which can provide important pre-experimental results for the real-time landslide monitoring in Hongkou Town, Sichun, China.
滑坡是严重威胁人类生命财产安全的自然灾害之一。滑坡实时监测对灾害救援具有重要意义。本文以同济大学校园滑坡试验场为研究对象,对基于近景摄影测量的滑坡实时监测方法的有效性进行了研究。首先对基于滑坡图像序列的特征点跟踪方法进行了测试,然后对滑坡表面高程变化检测方法进行了测试。实验结果表明,两种方法均能有效监测滑坡运动,为四川虹口镇滑坡实时监测提供了重要的预实验结果。
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引用次数: 13
期刊
2012 International Conference on Systems and Informatics (ICSAI2012)
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