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2014 IEEE 17th International Conference on Computational Science and Engineering最新文献

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Classification of Drowsiness in EEG Records Based on Energy Distribution and Wavelet-Neural Network 基于能量分布和小波神经网络的脑电睡意分类
Naiyana Boonnak, Suwatchai Kamonsantiroj, Luepol Pipanmaekaporn
Drowsiness is the main factors in traffic accidents because the ability of vehicle driver was diminished. These conditions will endanger to own driver and the other vehicle drivers. With the growing traffic conditions this problem will increase in the future. So, it is important to develop automatic characterization of the drowsiness stage. The aim of this paper presents a new method to improve wavelet coefficient of DWT for classification alert and drowsiness stages of EEG signals. The method applied the Parseval's theorem and energy coefficient distribution. The Input-Output cluster method was used to estimate the approximate status of each input features. Then these improve features are feeded into neural network classifier. The proposed method gets 90.27% of accuracy. The experimental results have shown that the proposed approach can achieve better performance in comparison with other based methods.
打瞌睡是造成交通事故的主要原因,因为打瞌睡使驾驶员的驾驶能力下降。这些情况将危及自己的司机和其他车辆的司机。随着交通状况的日益增长,这个问题在未来将会加剧。因此,建立睡意阶段的自动特征是很重要的。本文提出了一种改进小波变换系数的方法,用于脑电信号的清醒和困倦阶段的分类。该方法应用了Parseval定理和能量系数分布。使用输入-输出聚类方法估计每个输入特征的近似状态。然后将这些改进的特征输入到神经网络分类器中。该方法的准确率为90.27%。实验结果表明,与其他基于算法的方法相比,该方法具有更好的性能。
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引用次数: 1
Extended Gradient Local Ternary Pattern for Vehicle Detection 车辆检测的扩展梯度局部三元模式
Jian Li, Hanyi Du, Yingru Liu, Kai Zhang, Hui Zhou
In recent years, many vehicle detection algorithms have been proposed. However, a lot of challenges still remain. Local Binary Pattern (LBP) is one of the most popular texture descriptors which has shown its superiority in face recognition and pedestrian detection. But the original LBP pattern is sensitive to noise especially in flat region where gray levels change rarely. To solve this problem, Local Ternary Pattern (LTP) is proposed. Nevertheless, LBP and LTP are lack of gradient information. In this paper, after analysis and comparison, we propose a novel feature descriptor named Extended Gradient Local Ternary Pattern (EGLTP). The proposed descriptor, Extended Gradient Local Ternary Pattern (EGLTP), contains properties of other features, such as the original LTP being less sensitive to noise, Semantic Local Binary Patterns (S-LBP) having low complexity and good direction property, and HOG including lots of gradient information. Experiments showed that EGLTP feature is very discriminative and robust in comparison with other features.
近年来,人们提出了许多车辆检测算法。然而,仍然存在许多挑战。局部二值模式(LBP)是目前最流行的纹理描述符之一,在人脸识别和行人检测中显示出其优越性。但是原始的LBP模式对噪声很敏感,特别是在灰度变化很少的平坦区域。为了解决这个问题,提出了局部三元模式(LTP)。然而,LBP和LTP缺乏梯度信息。本文通过分析和比较,提出了一种新的特征描述符——扩展梯度局部三元模式(EGLTP)。本文提出的描述符扩展梯度局部三元模式(EGLTP)包含了原始LTP对噪声不敏感、语义局部二值模式(S-LBP)复杂度低、方向性好、HOG包含大量梯度信息等特征。实验表明,与其他特征相比,EGLTP特征具有很强的判别性和鲁棒性。
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引用次数: 2
Highly Efficient Local Non-Texture Image Inpainting Based on Partial Differential Equation 基于偏微分方程的高效局部无纹理图像修复
Chuang Zhu, Huizhu Jia, Meng Li, Xiaofeng Huang, Xiaodong Xie
Image in painting has been a popular study point in recent years and a number of strategies have been developed. Partial differential equation (PDE) image in painting approach often acts as a fundamental building block in this area. However, the high computing load limits the application of PDE-based image in painting, especially in mobile terminal. In this paper, first an enhanced Curvature-Driven Diffusions (ECDD) model is proposed to improve the repairing performance. Then a fast local non-texture in painting scheme is performed based on ECDD and total variation (TV) to make the computing of the PDE-based image in painting more efficient. The experimental results show that the proposed strategy not only can repair the long disconnected objects more accurately, but also can greatly shorten the iteration time of image in painting.
近年来,绘画中的形象一直是一个热门的研究点,并发展了一些策略。偏微分方程(PDE)图像在绘画方法中往往是这一领域的基本组成部分。然而,高计算负荷限制了基于pde的图像在绘画中的应用,特别是在移动端。本文首先提出了一种增强的曲率驱动扩散(ECDD)模型来提高修复性能。在此基础上,提出了一种基于ECDD和总变分(TV)的快速局部无纹理绘制方案,提高了基于pde的图像绘制的计算效率。实验结果表明,该方法不仅可以更准确地修复长时间断开的目标,而且可以大大缩短图像绘制的迭代时间。
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引用次数: 5
A Semi-centralized Algorithm to Detect and Resolve Distributed Deadlocks in the Generalized Model 广义模型中分布式死锁的半集中式检测与解析算法
Zhihong Tao, Hui Li, Bing Zhu, Yunmin Wang
To detect and resolve distributed deadlocks in the generalized model, a few algorithms have been proposed. Most of them are distributed algorithms which are based on the diffusing computation technique where propagation of probes and backward propagation of replies are required. On the contrary, centralized algorithms send the dependency information directly to the initiator. However, existing algorithms do not distinguish local deadlocks from global deadlocks. In this paper, we present a semi-centralized algorithm which effectively detects and resolves local deadlocks prior to global deadlocks. To be specific, a consistent snapshot of dependency information of involved nodes is recorded in an information table at each site. Therefore, the detection and resolution of local deadlocks can be performed at each site before the dependency information is sent to the initiator to further detect global deadlocks. The proposed algorithm also handles the problem of phantom edges and concurrent executions. Performance analysis shows that the performance of our algorithm is close to or better than that of the existing algorithms in terms of execution time, message traffic and message size.
为了检测和解决广义模型中的分布式死锁,提出了几种算法。它们大多是基于扩散计算技术的分布式算法,需要探测的传播和应答的反向传播。相反,集中式算法将依赖信息直接发送给发起者。然而,现有的算法并没有区分局部死锁和全局死锁。在本文中,我们提出了一种半集中式算法,它能在全局死锁之前有效地检测和解决局部死锁。具体地说,在每个站点的信息表中记录相关节点的依赖信息的一致快照。因此,在将依赖信息发送给启动器以进一步检测全局死锁之前,可以在每个站点执行本地死锁的检测和解析。该算法还处理了虚边和并发执行的问题。性能分析表明,我们的算法在执行时间、消息流量和消息大小方面的性能接近或优于现有算法。
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引用次数: 6
Publish/Subscribe in NoSQL NoSQL中的发布/订阅
Chia-Ping Tsai, Kuo-Yu Yang, Jui-Yu Hsieh, Hung-Chang Hsiao, Ching-Hsien Hsu
Present NoSQL databases are passive entities, where users proactively access the databases serving requested issued by users. While NoSQL databases are scalable due to their horizontal scale-out designs, data items stored in potentially very large databases are difficult to retrieve in terms of access delay, programmability and usability. In this paper, we advocate supporting events in NoSQL. By introducing publishers and subscribers to NoSQL, our proposed NoSQL data store is capable of proactively delivering data items that users are interested in. Additionally, our NoSQL database decouples publishers and subscribers such that application developers can emphasize on data manipulation without paying attention to communications for delivering data. We formally discuss the design requirements for streaming in NoSQL, and present a prototype implementation that addresses the design issues. Our implementation is then benchmarked, and the performance results are discussed. We finally outline potential enhancements to our proposal in this paper.
目前的NoSQL数据库是被动实体,用户主动访问用户发出请求的数据库。虽然NoSQL数据库由于其水平向外扩展设计而具有可伸缩性,但存储在潜在的非常大的数据库中的数据项在访问延迟、可编程性和可用性方面很难检索。在本文中,我们提倡在NoSQL中支持事件。通过向NoSQL引入发布者和订阅者,我们提出的NoSQL数据存储能够主动交付用户感兴趣的数据项。此外,我们的NoSQL数据库解耦了发布者和订阅者,这样应用程序开发人员就可以把重点放在数据操作上,而不必关注交付数据的通信。我们正式讨论了NoSQL中流的设计需求,并给出了一个解决设计问题的原型实现。然后对我们的实现进行基准测试,并讨论性能结果。最后,我们在本文中概述了我们的提案的潜在改进。
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引用次数: 1
Privacy Preserving Biometric-Based User Authentication Protocol Using Smart Cards 使用智能卡的基于生物特征的隐私保护用户认证协议
Minsu Park, Hyunsung Kim, Sung-Woon Lee
How to provide both security and privacy in communication networks has been an important issue for ubiquitous computing. Especially, user authentication in the current IT services has become one of important security issues. However, the security weaknesses in the user authentication have been exposed seriously due to the careless secret related information management and the sophisticated attack techniques. Recently, an enhanced biometric-based user authentication protocol is proposed by An, which uses three factors, password, smart card and biometrics. However, this paper shows that An's protocol has weaknesses in the password guessing attack and the lack of privacy support if an attacker could get user's smart card, could read on it and could intercept session messages between user and server. Furthermore, this paper proposes a privacy preserving biometric-based user authentication protocol using smart card, which could solve the overall problems in An's protocol and even put privacy considerations on it. The overall security analyses show that the proposed protocol achieves the desired security goals.
如何在通信网络中提供安全和隐私一直是普适计算的一个重要问题。特别是用户身份验证在当前IT服务中已经成为重要的安全问题之一。但是,由于保密信息管理的疏忽和攻击技术的成熟,使得用户认证中的安全漏洞暴露无遗。最近,an提出了一种基于生物特征的增强型用户认证协议,该协议采用密码、智能卡和生物特征三要素。然而,本文表明,如果攻击者可以获得用户的智能卡,可以读取用户的智能卡,并且可以拦截用户与服务器之间的会话消息,那么An协议在猜密码攻击和缺乏隐私支持方面存在弱点。在此基础上,本文提出了一种基于智能卡的隐私保护生物特征的用户认证协议,解决了安氏协议整体存在的问题,甚至对安氏协议进行了隐私方面的考虑。总体安全性分析表明,提出的协议达到了预期的安全目标。
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引用次数: 4
Dynamic Clone Sharing Scheme in Mobile Cloud Computing: A Delaunay Triangulation Approach 移动云计算中的动态克隆共享方案:一种Delaunay三角测量方法
Zhen Yang, Xing Liu
Owing to the nature of elastic resource pooling, cloud computing offers a great opportunity to extend the potentials of Mobile Devices (MDs) for supporting the resources-hungry applications. In the mobile cloud platforms, each MD is associated with a system-level clone in the cloud infrastructure. It provides the potentials in supporting the clone sharing. The clone sharing can reduce the communication delay between an MD and its clone when the MD moves far away from its clone. It is because that clone sharing can migrate the service from the remote source clone to a nearby target clone. Considering the mobility of MDs, how to select the appropriate target clone is still a big challenge. In this paper, we first pose the clone sharing question. The clone sharing can reduce the service delay between a MD and its clone when the MD move far away from its clone. It is because that it migrate the service from the remote source clone to a local target clone. However, how to select the appropriate target clone is a big challenge. We propose a clone sharing scheme, called as Triangulation-based Clone Sharing Scheme (TCS), to solve the problem. In the TCS scheme, we firstly disclose the relationship between clone serving area and the MD. Secondly, the TCS scheme splits the clone network into Triangle topology by our Clone Triangulation Topology Construction and Reconstruction (CTTCR) algorithm. It can accurately obtain the target clone for clone migration. We also prove the correctness of CTTCR algorithm. Simulation results show that our scheme works very well.
由于弹性资源池的性质,云计算提供了一个很好的机会来扩展移动设备(MDs)的潜力,以支持资源匮乏的应用程序。在移动云平台中,每个MD都与云基础架构中的系统级克隆相关联。它提供了支持克隆共享的潜力。克隆共享可以减少MD远离其克隆时与其克隆之间的通信延迟。因为克隆共享可以将远端源克隆的业务迁移到近端的目标克隆。考虑到MDs的移动性,如何选择合适的目标克隆仍然是一个很大的挑战。在本文中,我们首先提出克隆共享问题。克隆共享可以减少MD远离其克隆时与其克隆之间的服务延迟。这是因为它将服务从远端源克隆迁移到本地目标克隆。然而,如何选择合适的目标克隆是一个很大的挑战。为了解决这一问题,我们提出了一种基于三角测量的克隆共享方案(TCS)。在TCS方案中,我们首先揭示了克隆服务区域与MD之间的关系。其次,TCS方案通过克隆三角剖分拓扑构建与重构(CTTCR)算法将克隆网络划分为三角形拓扑。能够准确获取克隆迁移的目标克隆。证明了CTTCR算法的正确性。仿真结果表明了该方案的有效性。
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引用次数: 1
Realtime Illustrative Rendering of Large Scale Skinned Meshes 大规模蒙皮网格的实时说明性渲染
Juncong Lin, Guangyu Zhang, Xing Gao, Minghong Liao, Lisheng Xiang
Line drawing can express meaningful information by ignoring less important or distracting details, and thus becomes a popular shape depiction technique. However, existing methods mainly focused on static data. Although we can apply these methods to animated data frame by frame, it is still not applicable for large scale model due to the high computational cost. In this paper, we present a real time line drawing method for skinned mesh. We exploit the surface normal coherency between neighbouring frames to accelerate the computation of surface normal which is the bottleneck of most line drawing methods. The experimental results show that our method is both efficient and effective.
线条画可以通过忽略不太重要或分散注意力的细节来表达有意义的信息,因此成为一种流行的形状描绘技术。然而,现有的方法主要集中在静态数据上。虽然我们可以将这些方法应用于逐帧的动画数据,但由于计算成本高,仍然不适用于大规模模型。本文提出了一种实时绘制蒙皮网格线条的方法。我们利用相邻帧之间的曲面法线一致性来加快曲面法线的计算速度,这是大多数绘图方法的瓶颈。实验结果表明,该方法是高效有效的。
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引用次数: 0
Three GPU-Based Parallel Schemes for SAR Back Projection Imaging Algorithm 三种基于gpu的SAR反投影成像并行算法
Kebin Hu, Xiaoling Zhang, Wen-Jun Wu, Jun Shi, Shunjun Wei
Back projection (BP) algorithm has the ability of accurate imaging for synthetic aperture radar (SAR). However, the drawback of low computational efficiency limits the wide application of BP. In this paper, three different parallel schemes based on GPU for BP are presented. According to the features of serial structure of BP, the first two schemes are parallelized through mapping the pulse repetition intervals (PRIs) and pixels in the scene onto the parallel threads in GPU, respectively, another scheme combines the first two schemes together. In order to select the best scheme for application, we also provide a coarse criterion after detailed analysis of the three schemes from aspects of parallelization degree, memory occupancy and memory access efficiency. The simulation results are carried out and compared, which validates the efficacy of the three schemes.
BP算法对合成孔径雷达(SAR)具有精确成像的能力。然而,计算效率低的缺点限制了BP的广泛应用。本文提出了三种不同的基于GPU的BP并行方案。根据BP序列结构的特点,将前两种方案分别通过将场景中的脉冲重复间隔(PRIs)和像素映射到GPU的并行线程上进行并行化,另一种方案将前两种方案结合在一起。从并行化程度、内存占用率和内存访问效率三个方面对三种方案进行了详细分析,并给出了一个粗略的准则,以选择最适合应用的方案。仿真结果进行了比较,验证了三种方案的有效性。
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引用次数: 6
A Methodology for Evaluation and Knowledge Extraction from On-going Learning Process 持续学习过程的评价与知识提取方法
I. Perikos, P. Angelopoulos, M. Paraskevas, T. Zarouchas, Giannis Tzimas
This study presents the utilization of a Hybrid Education Platform for the realization of a versatile blended learning model oriented to computer engineering and science educators. Furthermore, a data mining approach is introduced to analyze the questionnaires that learners submit concerning the learning activities they have participated in. Specifically, a clustering and classification methodology framework is followed in order to efficiently examine and extract behavioral trends of the participants. Preliminary results indicate the robustness of the proposed methodology scheme which can potential be applied to various evaluation tasks.
本研究提出利用混合教育平台来实现面向计算机工程和科学教育者的多功能混合学习模式。在此基础上,采用数据挖掘的方法对学习者所提交的关于其所参与的学习活动的问卷进行分析。具体而言,为了有效地检查和提取参与者的行为趋势,遵循了聚类和分类方法框架。初步结果表明,所提出的方法方案具有鲁棒性,可以应用于各种评价任务。
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引用次数: 1
期刊
2014 IEEE 17th International Conference on Computational Science and Engineering
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