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2017 4th International Conference on Systems and Informatics (ICSAI)最新文献

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A novel anti-jamming method in wireless sensor networks: Using artificial noise to actively interfere the intelligent jammer 一种新的无线传感器网络抗干扰方法:利用人工噪声主动干扰智能干扰机
Pub Date : 2017-11-01 DOI: 10.1109/ICSAI.2017.8248423
Liang Pang, Zhi Xue
In wireless sensor networks, the shared wireless medium and the broadcast nature make the network vulnerable to intelligent jamming attacks. Such attacks are launched timely by eavesdropping on packets being sent across the network. They can severely affect the network capacity to execute its preset functions. In order to address this issue, we propose a novel anti-jamming method which uses the jammer location as the prerequisite to restore the communication links. The proposed method is based on using the artificial noise generated by the synergistic sensor nodes to degrade the wiretap channel of jammer. The feasibility of our method is theoretically proved with the possible network and jammer model. We also provide a simplified scheme to estimate some unknown parameters which are important for practical application. Extensive experiments are conducted in MATLAB to evaluate the effectiveness and performance of our method. The experimental results suggest that the proposed method can make the jammer unable to correctly decode the received packets because of the low Signal-to-Noise Ratio, and significantly restore the communication links by increasing the Packet Send Ratio (PSR)/Packet Delivery Ratio (PDR) at the transmitter/receiver side.
在无线传感器网络中,无线介质的共享性和广播性使网络容易受到智能干扰攻击。这种攻击是通过窃听网络上发送的报文来及时发起的。它们会严重影响网络执行其预设功能的能力。为了解决这一问题,我们提出了一种以干扰机位置为前提恢复通信链路的抗干扰方法。该方法是利用协同传感器节点产生的人工噪声来降低干扰机的窃听信道。用可能的网络和干扰机模型从理论上证明了该方法的可行性。我们还提供了一个简化的方案来估计一些在实际应用中很重要的未知参数。在MATLAB中进行了大量的实验来评估我们的方法的有效性和性能。实验结果表明,该方法可以使干扰机因信噪比低而无法正确解码接收到的数据包,并通过提高发送端/接收端分组发送比(PSR)/分组发送比(PDR)显著恢复通信链路。
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引用次数: 3
The application of indoor localization systems based on the improved Kalman filtering algorithm 基于改进卡尔曼滤波算法的室内定位系统应用
Pub Date : 2017-11-01 DOI: 10.1109/ICSAI.2017.8248389
Yilun Sun, Qiang Sun, Kai-Di Chang
In order to improve the accuracy of indoor positioning in wireless sensor network, an indoor localization algorithm based on improved Kalman filtering is proposed. By introducing suboptimal unbiased maximum a posteriori (MAP) noise statistical estimator, the system noise covariance and measurement noise covariance of Kalman algorithm is modified adaptively to replace Gaussian white noise sequence of zero mean difference and known covariance, which makes the algorithm have the good filtering effect. In order to show the performance of the proposed algorithm, the indoor localization algorithm performance is compared. The experiment result shows that the proposed algorithm can improve indoor positioning accuracy of unknown nodes.
为了提高无线传感器网络中室内定位的精度,提出了一种基于改进卡尔曼滤波的室内定位算法。通过引入次优无偏最大后验噪声统计估计量,对卡尔曼算法的系统噪声协方差和测量噪声协方差进行自适应修正,取代均值差为零、协方差已知的高斯白噪声序列,使算法具有良好的滤波效果。为了展示所提算法的性能,对比了室内定位算法的性能。实验结果表明,该算法可以提高未知节点的室内定位精度。
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引用次数: 9
Implementing neuro-adaptive control algorithms with sliding mode learning on industrial servo drives 基于滑模学习的神经自适应控制算法在工业伺服驱动器上的实现
Pub Date : 2017-11-01 DOI: 10.1109/ICSAI.2017.8248273
N. Dimitrov, A. Topalov, Sevil A. Ahmed, Pavel Radev
The demand of the industry for high performance electric motors has significantly increased nowadays. This has boosted the usage of permanent magnet brushless synchronous motors (BLSM) in many applications where the accuracy and performance requirements are high. Further improvement of the BLSM drive systems performance can be achieved by providing them with adaptive control capabilities. The relative complexity of adaptive control schemes and algorithms and the computational load that they impose have prevented until recently their practical implementation into the industrial servo systems. In this investigation, a neuro-adaptive control scheme where the rule for parameter adaptation is designed by taking into account the variable structure control (VSC) concepts and Lyapunov stability, is proposed and embedded into an inexpensive, available on the market, position control system for brushless synchronous servomotors. The experimental tests have been carried on using compact and flexible, based on open hardware and software concept, dual-axis motion controllers PMC201/PMC202 manufactured by the PicoMotion Inc. The applied software has been written using the Motion Control Framework software platform, provided together with the above controllers. The results obtained with the proposed neuro-adaptive control scheme have been compared to those obtained using the originally built into the system PI controller. The experiments have shown that the implemented advanced adaptive control approach is practically viable and can be embedded into the industrial motion control systems which will lead to their improved performance.
目前,工业对高性能电动机的需求显著增加。这促进了永磁无刷同步电机(BLSM)在许多精度和性能要求高的应用中的使用。通过提供自适应控制能力,可以进一步提高BLSM驱动系统的性能。自适应控制方案和算法的相对复杂性以及它们所施加的计算负荷直到最近才阻碍了它们在工业伺服系统中的实际实施。在本研究中,提出了一种神经自适应控制方案,其中参数自适应规则是通过考虑变结构控制(VSC)概念和李雅普诺夫稳定性来设计的,并将其嵌入到市场上廉价的无刷同步伺服电机位置控制系统中。采用PicoMotion公司的PMC201/PMC202双轴运动控制器进行了紧凑灵活、软硬件开放的实验测试。应用软件是使用与上述控制器一起提供的运动控制框架软件平台编写的。用所提出的神经自适应控制方案获得的结果与使用原始系统内置PI控制器获得的结果进行了比较。实验表明,所实现的先进自适应控制方法是切实可行的,可以嵌入到工业运动控制系统中,从而提高其性能。
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引用次数: 0
Parameter analysis and selection for human gait characterization using a low cost vision system 基于低成本视觉系统的人体步态特征参数分析与选择
Pub Date : 2017-11-01 DOI: 10.1109/ICSAI.2017.8248289
J. Ferreira, Tao Liu, Portugal Coimbra, Paulo Coimbra
The main objective of this research project is to develop a low cost computerized system to automatically diagnose gait disorders and characterize their severity. The system uses 2 video cameras to provide a 3D position acquisition system connected to a personal computer. The patient gait and posture are analyzed from the data acquired by a vision-based gait acquisition system. The whole system will be an important novel tool in medical rehabilitation and diagnosis, resulting on a more effective functional rehabilitation of a patient's gait, assessing their clinical evolution and solving the limitations of the current subjective gait diagnosis tools. The system allows the calculation of 17 human gait joint trajectories. This system will provide a much more objective understanding of the patient's clinical evolution, and thus enables a more effective functional rehabilitation of a patient's gait. In this paper it is presented the selection of the relevant diagnosis parameters of the gait patterns, which is one of the steps to get to the main objective, the automatic diagnosis of human gaits.
本研究项目的主要目标是开发一种低成本的计算机系统来自动诊断步态障碍并表征其严重程度。该系统使用2个摄像机提供连接到个人电脑的3D位置采集系统。利用基于视觉的步态采集系统采集到的数据对患者的步态和姿态进行分析。整个系统将成为医学康复和诊断的重要新工具,对患者的步态进行更有效的功能康复,评估其临床演变,解决当前主观步态诊断工具的局限性。该系统允许计算17个人类步态关节轨迹。该系统将为患者的临床发展提供更客观的理解,从而使患者的步态功能康复更加有效。本文介绍了步态模式相关诊断参数的选取,这是实现人体步态自动诊断这一主要目标的步骤之一。
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引用次数: 0
Colored Petri Net modeling of communication systems based on IEC 61850 基于IEC 61850的通信系统彩色Petri网建模
Pub Date : 2017-11-01 DOI: 10.1109/ICSAI.2017.8248432
M. R. Silva, P. Machado, L. E. Souza, Carlos Waldecir de Souza
This paper presents a methodology to analyze the performance of a switched IEC 61850-9-2 network using the formalism of Colored Petri Nets (CPN). In order to decrease the complexity of the network analysis, it is assumed a model with distinct hierarchical levels, and this model allows describing the function and interaction of each element in an easy way. After the modeling process, the proposed methodology is validated by an implementation of an IEC 61850 scenario where the transfer of Sampled Value messages is put in a critical condition. As the simulations show, this methodology allows the evaluation of message latency and capacity limits using just modeling based on discrete events.
本文提出了一种利用彩色Petri网(CPN)的形式分析交换式iec61850 -9-2网络性能的方法。为了降低网络分析的复杂性,假设一个具有不同层次的模型,该模型允许以一种简单的方式描述每个元素的功能和相互作用。在建模过程之后,通过IEC 61850场景的实现验证了所提出的方法,其中采样值消息的传输处于临界状态。如模拟所示,该方法允许仅使用基于离散事件的建模来评估消息延迟和容量限制。
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引用次数: 0
Ultrasound elastography based on the normalized cross-correlation and the PSO algorithm 基于归一化互相关和粒子群算法的超声弹性成像
Pub Date : 2017-11-01 DOI: 10.1109/ICSAI.2017.8248455
Jiaqi Wang, Qinghua Huang, Xin Zhang
Ultrasound elastography is a common medical imaging applied in medical applications since it can provide the tissue hardness information. Most ultrasound elastography techniques are window based methods. The key of the quasi-static ultrasound elastography is to do the similarity measure between two windows from pre- and post-compression to compute the displacement. In view of this situation, the window size has an important influence on the strain images quality. In this paper, a reasonable method utilizing PSO algorithm to search for the optimal window length for different data is brought out to solve this problem. The displacement map can be estimated with the optimal window length using the normalized cross correlation method. And a spatial derivative operator is applied to estimate the strain map. The strain images with the fixed window length 12 and 50 and the optimal window length using PSO algorithm are compared in this paper. Results show that using PSO algorithm to search for the optimal window length can improve the SNR and CNR of strain images.
超声弹性成像可以提供组织硬度信息,是一种常用的医学成像技术。大多数超声弹性成像技术是基于窗口的方法。准静态超声弹性成像的关键是对压缩前后两个窗口进行相似性度量,从而计算位移。鉴于这种情况,窗口的大小对应变图像的质量有重要的影响。本文提出了一种利用粒子群算法对不同数据搜索最优窗长的合理方法来解决这一问题。利用归一化互相关法可以估计出位移图的最佳窗长。利用空间导数算子估计应变图。对固定窗长为12和50的应变图像以及采用粒子群算法的最佳窗长进行了比较。结果表明,利用粒子群算法搜索最佳窗口长度可以提高应变图像的信噪比和信噪比。
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引用次数: 6
Discovery of interesting effectiveness itemsets with several minimal thresholds using average constraint 使用平均约束发现具有几个最小阈值的有趣有效性项集
Pub Date : 2017-11-01 DOI: 10.1109/ICSAI.2017.8248507
Weimin Ouyang
Discovery of interesting effectiveness itemsets has been a hot topics in data mining and knowledge discovery. Most previous researches related to effectiveness mining in literature employ a individual minimal threshold of effectiveness to decide on if an item is a interesting effectiveness item. Nevertheless, a individual minimal threshold of effectiveness could not express the varied natures of diverse items. In this paper, the author put forward a algorithm to discover interesting effectiveness itemsets with several minimal thresholds using average constraint. The reports of tests demonstrated that our algorithm is better than other baseline algorithms in performance.
有趣有效性项集的发现一直是数据挖掘和知识发现领域的研究热点。以往文献中关于有效性挖掘的研究大多采用个体最小有效性阈值来确定一个项目是否为有趣的有效性项目。然而,个体的最小有效性阈值不能表达不同项目的不同性质。本文提出了一种利用平均约束发现具有多个最小阈值的感兴趣有效项集的算法。测试报告表明,我们的算法在性能上优于其他基准算法。
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引用次数: 0
Rapid detection algorithms for log diameter classes based on stereo vision 基于立体视觉的测井径类快速检测算法
Pub Date : 2017-11-01 DOI: 10.1109/ICSAI.2017.8248480
Guanghua Chen, Qiang Zhang, Meiqian Chen, H. Yin
Log Diameter Classes 3D measurement with binocular stereo vision system was adopted. According to the log-end histogram feature, a region labeling method was proposed based on the maximum entropy threshold segmentation. Adopting the region labeling based on pixel labeled method of connecting area, each log could be precisely identified and counted by the system. Extraction of log edge using a Canny operator, completed stereo matching based on the epipolar line rectification, then obtained the matching 3D coordinate points. According to the quasi-circular of the log ends, selected the appropriate initial value to fit the elliptic boundary value. The smallest Euclidean distance between the boundary points and fitting points was calculated by using least squares principle, thus the best fitting ellipse and log diameter class parameters of major axis and minor axis were gotten. Experiment shows that the proposed algorithms can accurately and rapidly detect the log diameter classes.
测井径级采用双目立体视觉系统进行三维测量。根据对数端直方图特征,提出了一种基于最大熵阈值分割的区域标注方法。采用基于连通区域像素标记的区域标记方法,系统可以对每条日志进行精确的识别和计数。利用Canny算子提取原木边缘,在极线校正的基础上完成立体匹配,得到匹配的三维坐标点。根据对数端点的拟圆度,选择合适的初值拟合椭圆边值。利用最小二乘原理计算边界点与拟合点之间的最小欧氏距离,从而得到最佳拟合椭圆和长、短轴对数直径类参数。实验表明,该算法能够准确、快速地检测出测井径类。
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引用次数: 0
Deep convolutional neural network applies to face recognition in small and medium databases 深度卷积神经网络应用于中小型数据库中的人脸识别
Pub Date : 2017-11-01 DOI: 10.1109/ICSAI.2017.8248499
Minjun Wang, Zhihui Wang, Jinlin Li
This paper proposes a method combining local binary patterns (LBP) and deep convolution neural network. This paper extracts LBP features of face image as an input of CNN, and train the CNN network with the LBP features, then use the trained network for face recognition, so that we can get rid of disadvantages of poor stability of CNN gray scale and identify the trained CNN network more effectively. This algorithm has been experimented on several common face libraries, Indicating that its performance than the traditional methods and general deep learning methods have improved.
提出了一种将局部二值模式(LBP)与深度卷积神经网络相结合的方法。本文提取人脸图像的LBP特征作为CNN的输入,利用LBP特征对CNN网络进行训练,再利用训练后的网络进行人脸识别,从而摆脱CNN灰度稳定性差的缺点,更有效地识别训练后的CNN网络。该算法在几种常用人脸库上进行了实验,表明其性能比传统方法和一般深度学习方法都有提高。
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引用次数: 34
Human activity recognition based on Hidden Markov Models using computational RFID 基于隐马尔可夫模型的计算RFID人体活动识别
Pub Date : 2017-11-01 DOI: 10.1109/ICSAI.2017.8248397
Guibing Hu, Xue-song Qiu, Luoming Meng
RFID is widely adopted for human activity recognition in interior environments, e.g., elder-caring. Gaining insight through raw RFID data analysis is the key part of the human activity recognition systems. However, the inviolable uncertainty in RFID data, including external environment noise and fragmentary reading (reading collision), increase the difficulty for high-level application widely adoption. In order to address these challenges, we proposing a Hidden Markov Models based data analysis approach in this paper, comparing with previous researches, our method need less limitations and requires only a few prior knowledge about RFID placing, the approach learns from raw RFID data and apply it to analyze the data. Our method analyzes RFID RSSI and 3D-accelerometer data collecting from human movement recognition to overcome aforementioned issues. This system has already been built and successfully deployed in a real experimental room. Result shows that the system run well to obtains an activity recognition with low error rate of 2.5%.
RFID被广泛应用于室内环境的人类活动识别,例如老年人护理。通过原始RFID数据分析获得洞察力是人类活动识别系统的关键部分。然而,RFID数据中不可侵犯的不确定性,包括外部环境噪声和碎片读取(读取冲突),增加了其在高级应用中广泛采用的难度。为了解决这些问题,本文提出了一种基于隐马尔可夫模型的数据分析方法,与以往的研究相比,该方法减少了对RFID放置的限制,只需要少量的先验知识,该方法从RFID原始数据中学习并应用于数据分析。我们的方法分析了从人体运动识别中收集的RFID RSSI和3d加速度计数据,以克服上述问题。该系统已经建成,并成功部署在一个真实的实验室内。结果表明,该系统运行良好,获得了较低的误差率(2.5%)。
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引用次数: 4
期刊
2017 4th International Conference on Systems and Informatics (ICSAI)
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