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2010 Fourth Asia International Conference on Mathematical/Analytical Modelling and Computer Simulation最新文献

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Object Exploration Algorithm Based on Three-Axis Tactile Data 基于三轴触觉数据的目标探测算法
S. C. Abdullah, J. Wada, M. Ohka, H. Yussof
In order to progress robust object recognition of robots, we present an algorithm for object exploration based on three-axis tactile data that is necessary and sufficient for evaluation of contact phenomena. Object surface contour is gathered by controlling finger position to keep a constant the normal force measured by optical three-axis tactile sensors as two fingertips slide along the object surface. In this algorithm, when the robot grasps the object, time derivative of shearing force is checked to judge initial contact state because it is more sensitive than normal force. After contact between fingertips and the object, normal force is adjusted to keep a constant with a tolerant value between upper and lower thresholds. In the verification test, shape exploration experiments are conducted using sinusoidal shape hard object of wood. Experimental results show that this tactile sensor is capable of gathering the surface shape information of an object having concave or convex portion because the finger position controlled by normal force obtained by this tactile sensor follows the object surface.
为了推进机器人的鲁棒目标识别,我们提出了一种基于三轴触觉数据的目标探索算法,这对于评估接触现象是必要和充分的。通过控制手指位置来采集物体表面轮廓,使光学三轴触觉传感器测量到的两个指尖沿物体表面滑动时的法向力保持恒定。在该算法中,由于剪切力比法向力更敏感,在机器人抓取物体时,通过对剪切力的时间导数进行校核来判断初始接触状态。指尖与物体接触后,调整法向力,使其保持恒定,并在上下阈值之间有一个容差值。在验证试验中,采用正弦波形状的木质硬物进行形状探测实验。实验结果表明,该触觉传感器获得的法向力控制的手指位置沿物体表面移动,能够采集具有凹部或凸部物体的表面形状信息。
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引用次数: 5
A Parallel Bees Algorithm for ATC Enhancement in Modern Electrical Network 现代电网中ATC增强的并行蜜蜂算法
R. Idris, A. Khairuddin, M. Mustafa
This paper presents a parallel-based methodology for placement of Flexible AC Transmission Systems (FACTS) devices in order to reduce the time it takes to reach a solution while maximizing the available transfer capability (ATC) of a given power system. The Parallel Bees Algorithms (PBA) simultaneously searches the location, size and types of FACTS devices to enhance ATC between the source and sink area. Four types of emerging FACTS devices are used namely, Thyristor Controlled Series Compensator (TCSC), Static Var Compensator (SVC), Unified Power Flow Controller (UPFC) and Thyristor Controlled Phase Shift Tranformer (TCPST). The IEEE118 Bus system is used to illustrate the applicability of the proposed algorithm to enhance ATC effectively. The results obtained are very encouraging and compared to a Bees Algorithm (BA), Genetic Algorithm (GA) and Parallel Genetic Algorithms (PGA). The results show that parallel computing technique can be used effectively to reduce time to reach a solution for large scale network and FACTS devices have proven their utility for ATC improvement.
本文提出了一种基于并行的柔性交流传输系统(FACTS)设备放置方法,以减少达到解决方案所需的时间,同时最大化给定电力系统的可用传输能力(ATC)。并行蜜蜂算法(PBA)同时搜索FACTS设备的位置、大小和类型,以增强源和汇区域之间的ATC。使用四种新型FACTS器件,即晶闸管控制串联补偿器(TCSC),静态无功补偿器(SVC),统一功率流控制器(UPFC)和晶闸管控制相移变压器(TCPST)。以IEEE118总线系统为例,说明了该算法在提高ATC性能方面的适用性。所得结果令人鼓舞,并与蜜蜂算法(BA)、遗传算法(GA)和并行遗传算法(PGA)进行比较。结果表明,并行计算技术可以有效地减少大规模网络解决方案的时间,事实设备已经证明了它们在ATC改进方面的效用。
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引用次数: 8
Performance Assessment of Active Vibration Control using Nominal Characteristic Trajectory Following (NCTF) Controller 基于标称特性轨迹跟踪(NCTF)控制器的振动主动控制性能评估
Mohd Ashraf Ahmad, M. S. Ramli, A. Nasir, R. Ismail, M. S. Saealal
This paper describes the use of angular position control approaches for a flexible robot manipulator with disturbance effect in the dynamic system. A nominal characteristic trajectory following (NCTF) controller is used to actively control the vibration of flexible structures. The controller design, which is comprised of a nominal characteristic trajectory(NCT) and PI compensator, is free from exact modelling and parameter identification. The NCT is determined from an open-loop response and the PI compensator is used to make the manipulator motion to follow the NCT. The effectiveness of the NCTF controller is evaluated and compared with Linear Quadratic Regulator (LQR) controller through simulations. A complete analysis of simulation results for each technique is presented in time domain and frequency domain respectively. Moreover, performances of the controller are examined in terms of vibration suppression and disturbances cancellation.
本文介绍了一种具有扰动效应的柔性机械臂动态系统的角位置控制方法。采用标称特征轨迹跟踪(NCTF)控制器对柔性结构的振动进行主动控制。控制器设计由标称特征轨迹(NCT)和PI补偿器组成,不需要精确的建模和参数识别。NCT由开环响应确定,并使用PI补偿器使机械手运动跟随NCT。通过仿真对NCTF控制器的有效性进行了评价,并与线性二次型调节器(LQR)控制器进行了比较。分别在时域和频域对每种技术的仿真结果进行了完整的分析。此外,从抑制振动和消除干扰两方面对控制器的性能进行了测试。
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引用次数: 1
A Real Time Vision-Based Hand Gesture Interaction 基于视觉的实时手势交互
Y. Pang, N. A. Ismail, P. S. Gilbert
Moving beyond mouse and keyboard, the evolution of human-computer interaction (HCI) has been an interest research in recent years which witnessed the development from text-based like using a keyboard to graphic user interface (GUI) based on a mouse, from cumbersome data gloves and tracking devices to visual-based computer application. One of the interest fields is by using hand gestures to interact with computer. However, the complexity of a hand set a lot of challenges to be tracked. In real-time, the application requires high accurate detection and recognition. In additional the real and clutter environments have a big impact on recognition process because it included with irrelevant information from the application point of view. In this paper, a real time vision based hand gesture interaction prototype was proposed. Currently a prototype has built for controlling the desktop cursor and concerned the tasks involving in navigation the desktop cursor by using hand gesture input modality
除了鼠标和键盘之外,人机交互(HCI)的演变近年来一直是一个有趣的研究,它见证了从基于文本的键盘到基于鼠标的图形用户界面(GUI)的发展,从繁琐的数据手套和跟踪设备到基于视觉的计算机应用程序的发展。其中一个有趣的领域是使用手势与计算机进行交互。然而,手的复杂性给追踪带来了很多挑战。在实时应用中,需要高精度的检测和识别。此外,从应用的角度来看,真实环境和杂波环境中包含的不相关信息对识别过程有很大的影响。本文提出了一种基于实时视觉的手势交互原型。目前已经建立了一个用于控制桌面光标的原型,并涉及通过使用手势输入方式导航桌面光标的任务
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引用次数: 24
Colour Image Segmentation of Tuberculosis Bacilli in Ziehl-Neelsen-Stained Tissue Images Using Moving K-Mean Clustering Procedure 基于移动k均值聚类的ziehl - nelson染色组织图像中结核杆菌的彩色图像分割
M. K. Osman, M. Y. Mashor, Z. Saad, H. Jaafar
Segmentation of tuberculosis bacilli in Zeihl-Neelsen tissue slide images is a crucial step in computer-assisted tuberculosis bacilli detection. In this paper, an automatic colour image segmentation using moving k-mean clustering was proposed. First, initial filter is used to remove the tissues images which remain blue after counterstaining process. After that, moving k-mean clustering using green component of RGB colour model and R_y component of C-Y colour model are used to segment the TB bacilli from its undesirable background which also remains red even after decolourization process. Then a 5×5 median filter and region growing was used to eliminate small regions and noises. The proposed methods have been analysed for several TB slide images under various conditions. Experimental results indicate that the proposed techniques were successfully segment TB bacilli from its background.
结核杆菌的切片分割是计算机辅助结核杆菌检测的关键步骤。提出了一种基于移动k均值聚类的彩色图像自动分割方法。首先,用初始滤波法去除反染后仍为蓝色的组织图像。然后,利用RGB颜色模型的绿色分量和C-Y颜色模型的R_y分量进行移动k-均值聚类,将结核杆菌从其不需要的背景中分离出来,即使脱色处理后结核杆菌仍保持红色。然后利用5×5中值滤波和区域生长去除小区域和噪声。对几种不同条件下的TB幻灯片图像进行了分析。实验结果表明,该方法能成功地从背景中分离出结核杆菌。
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引用次数: 21
Linear and Nonlinear Modeling of Adult Malaysian Population's Hand Grip Strength 马来西亚成年人口握力的线性和非线性建模
R. Ahmad, Ai Ping-Yap, Pan-Qian Lin, T. Kamarul
Hand grip strength is a known indicator of hand function and its measurement is a useful criterion in designing post hand-surgery rehabilitation program. It is established that normal grip strength of patients is correlated with age, weight, height, gender, occupation and hand dominant. In this work, predictive linear and nonlinear models based on 412 healthy average Malaysians are built using least squares and neuro-fuzzy estimators respectively. Two quality of fits are used to evaluate the accuracy of the predictive models. It was found that the neuro-fuzzy model that maps the six inputs nonlinearly is superior to the linear model in describing the input-output relationship of the data
握力是手部功能的一项已知指标,其测量是设计手部手术后康复方案的有用标准。确定患者正常握力与年龄、体重、身高、性别、职业、手优势等相关。在这项工作中,分别使用最小二乘法和神经模糊估计器建立了基于412名健康平均马来西亚人的预测线性和非线性模型。用两个拟合质量来评价预测模型的准确性。结果表明,神经模糊模型对6个输入进行非线性映射,在描述数据的输入输出关系方面优于线性模型
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引用次数: 4
Dissolve Detection Based Shot Identification Using Singular Value Decomposition 基于奇异值分解的溶解检测镜头识别
Milind G. Padalkar, M. Zaveri
Today, with the availability of large amount of video files, searching for videos with desired content is becoming a tedious task. The viewers require better control over the video data and for this reason the video browsing and indexing applications are being developed. These applications are required to segment the video into shots in the initial step. Shot boundary detection for shots separated by abrupt changes has been successful to a large extent, but detecting shot boundaries with gradual transitions in between, has been very challenging. In this paper, we propose a dual stage divide-and-merge approach to detect shots joined by dissolve type transitions. In the first stage we declare the video frames to be of either dissolve type or non-dissolve type. Later, we iteratively combine the sequences of non-dissolve frames that constitute the different shots. For experimental purpose, we have used the videos downloaded from the free video sharing website YouTube. The experimental results prove that the proposed technique is indeed effective.
如今,随着大量视频文件的可用性,搜索具有所需内容的视频已成为一项乏味的任务。观众需要更好地控制视频数据,因此正在开发视频浏览和索引应用程序。这些应用程序需要在初始步骤中将视频分割成镜头。对于突然变化间隔的镜头边界检测在很大程度上是成功的,但是对于渐变间隔的镜头边界检测却非常具有挑战性。在本文中,我们提出了一种双阶段分割合并方法来检测由溶解型过渡连接的镜头。在第一阶段,我们声明视频帧为溶解型或非溶解型。之后,我们迭代地组合构成不同镜头的非溶解帧的序列。出于实验目的,我们使用了从免费视频分享网站YouTube下载的视频。实验结果证明了该方法的有效性。
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引用次数: 3
A Statistical Approach for Rubber Seed Clones Classification Using Reflectance Index 利用反射率指数进行橡胶种子无性系分类的统计方法
F. N. Osman, H. Hashim, S. Al-Junid, M. A. Haron, N. E. Abdullah, M. Muhammad
This paper presents a statistical study for rubber seed clones classification. There are five types of clones from the same series of rubber seed being used as samples in this work which are the PB360, RRIM2009, RRIM2011, RRIM2016 and RRIM2025. The main objective is to identify significant features based on reflectance indices of both lateral and dorsal of the rubber seed surfaces from the application of ZEISS spectrometer instrument. The instrument measures the percentage of reflectance with respect to intensity of safe radiation light being reflected from the seed surface. Empirical analysis is done using SPSS software in order to identify discrimination between the clones. From the observed error plots and one-way ANOVA measurements, it is shown that reflectance indices of lateral surface can be used to recognize significantly the RRIM2009 from the other rubber seed clones.
本文对橡胶种子无性系分类进行了统计研究。本研究采用同一橡胶种子系列的5种无性系作为样品,分别为PB360、RRIM2009、RRIM2011、RRIM2016和RRIM2025。主要目的是利用蔡司光谱仪对橡胶种子表面侧面和背面的反射率指数来识别橡胶种子表面的重要特征。该仪器测量反射率相对于从种子表面反射的安全辐射光强度的百分比。使用SPSS软件进行实证分析,以确定克隆之间的歧视。从观测误差图和单因素方差分析结果可以看出,RRIM2009的侧表面反射率指数能够较好地识别橡胶种子无性系和其他无性系。
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引用次数: 8
QoS Parameter Optimization Using Multi-Objective Genetic Algorithm in MANETs 基于多目标遗传算法的MANETs QoS参数优化
Noor M. Asraf, R. N. Ainon, Phang Keat Keong
The increase in proliferation of mobile devices and wireless technologies in recent years has opened up new challenges in mobile ad hoc networks (MANET). This growth has also led to an increase in demand of applications such as streaming video, multi-player interactive games and financial services such as real-time stock quotes. Such applications impose a strict guarantee on quality of service (QoS), namely on end-to-end delay, bandwidth consumption and cost. But finding a path that satisfies multiple constraints is inherently hard. Further challenges occur with routing in a mobile environment where nodes are mobile, the data delivery path constantly changes and routing is constrained by battery levels. Multicast routing can improve network usage by sharing resources when sending messages to multiple destinations especially when multiple mobile nodes are located within transmission range of a node. We propose a multicast routing technique based on multi-objective genetic algorithm (MOGA) that optimizes multiple QoS parameters in MANET to find an optimal multicast tree. Simulation studies show that the GA is robust and scales well for a relatively large number of nodes.
近年来,移动设备和无线技术的飞速发展给移动自组织网络(MANET)带来了新的挑战。这种增长也导致了流媒体视频、多人互动游戏和实时股票报价等金融服务等应用需求的增加。这些应用对服务质量(QoS),即端到端延迟、带宽消耗和成本有严格的保证。但找到一条满足多个约束条件的路径本身就很困难。在移动环境中,节点是移动的,数据传递路径不断变化,路由受到电池电量的限制,因此路由会面临进一步的挑战。当向多个目的地发送消息时,特别是当多个移动节点位于一个节点的传输范围内时,组播路由可以通过共享资源来提高网络利用率。提出了一种基于多目标遗传算法(MOGA)的多播路由技术,通过对多QoS参数进行优化,找到最优组播树。仿真研究表明,该算法具有较好的鲁棒性和可扩展性。
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引用次数: 10
Optimal Self Tuned Variable Structure Sliding Mode for Coordinated Wind-FC-Diesel Utilization Scheme 最优自调谐变结构滑模的风-燃料-柴油协调利用方案
A. Sharaf, A. El-Gammal
The modeling and coordinated control strategy based on self tuned variable structure sliding mode dynamic controller for a wind–diesel-fuel cell renewable generation system with battery backup are discussed in this paper. The proposed hybrid scheme tracks the maximum power efficiency and optimal energy capture from the wind, diesel and the fuel cell. The diesel generator set unit issued to balance the system demand power according to the total power demand in order to minimize the diesel fuel consumption. The paper presents a novel application of Multi Objective Particle Swarm Optimization MOPSO technique to control the 6-pulse rectifier converter, dynamic filter/capacitor compensation DFC and Green Power Filter GPF schemes using real time dynamic self regulating error tracking to maximize the energy capture from the wind turbine. A tri-loop error driven dynamic controller is used to adjust the PWM switching of the DFC- Dynamic AC side filter compensator and green power filter. Full power factor correction and power quality enhancement is validated under different operating conditions, including sudden load disturbances and wind velocity excursions. Multi Objective Optimization MOPSO technique is used to find the optimal control gain settings that dynamically minimize the global dynamic error.
研究了一种基于自调谐变结构滑模动态控制器的带备用电池的风能-柴油电池可再生发电系统的建模和协调控制策略。提出的混合方案跟踪最大的功率效率和最佳的能量捕获从风,柴油和燃料电池。柴油发电机组根据总电力需求发出平衡系统需求功率,以尽量减少柴油的消耗。本文提出了一种新的多目标粒子群优化(MOPSO)技术,利用实时动态自调节误差跟踪控制6脉冲整流变换器、动态滤波/电容补偿DFC和绿色电力滤波器GPF方案,以最大限度地从风力发电机组中捕获能量。采用三环误差驱动动态控制器调节DFC-动态交流侧滤波器补偿器和绿色电源滤波器的PWM开关。在不同的运行条件下,包括突然负载扰动和风速漂移,验证了全功率因数校正和电能质量增强。采用多目标优化技术寻找全局动态误差最小的最优控制增益设置。
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引用次数: 1
期刊
2010 Fourth Asia International Conference on Mathematical/Analytical Modelling and Computer Simulation
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