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Solving TSP by dismantling cross paths 通过拆除交叉路径解决TSP
Pub Date : 2014-11-20 DOI: 10.1109/ICOT.2014.6956614
Yongsheng Pan, Yong Xia
Traveling salesman Problem (TSP) is a classical NP-hard problem and has been extensively studied in literature. Eliminating the cross paths, which commonly exist in approximate solutions to large scale TSP, can effectively improve the quality of the solutions. Through studying the impact of cross paths on the cost of a loop, in this paper we develop a method to detect and dismantle cross paths, and thus propose a novel greedy algorithm-based approach to the TSP. This approach has been evaluated on ten TSP data sets and compared to three classical optimization techniques, including the elastic network, ant colony algorithm and genetic algorithm. Our results show that the proposed approach can get approximate solution of high quality with far less computational cost and has an excellent performance in solving large-scale TSP.
旅行商问题(TSP)是一个经典的np困难问题,在文献中得到了广泛的研究。消除大规模TSP近似解中普遍存在的交叉路径可以有效地提高解的质量。通过研究交叉路径对环路成本的影响,本文提出了一种检测和拆除交叉路径的方法,从而提出了一种新的基于贪心算法的TSP方法。该方法已在10个TSP数据集上进行了评估,并与弹性网络、蚁群算法和遗传算法等三种经典优化技术进行了比较。结果表明,该方法能以极低的计算成本获得高质量的近似解,在求解大规模TSP问题方面具有优异的性能。
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引用次数: 7
A multistep liver segmentation strategy by combining level set based method with texture analysis for CT images 基于水平集和纹理分析相结合的CT图像肝脏多步分割策略
Pub Date : 2014-11-20 DOI: 10.1109/ICOT.2014.6956611
Dengwang Li, Li Liu, Jinhu Chen, Hongsheng Li, Yong Yin
A multi step liver segmentation method is proposed by combining improved level set based method with texture analysis technique for computed tomography (CT) images in this work. The aiming of proposed algorithm is to overcome the segmentation problem which is caused by similar intensities between liver region and its neighboring tissues, also robust to the variations of shape and size within liver region. Firstly, the total variation with the L1 norm (TV-L1) was used for obtaining the initial liver region, which can make the algorithm more efficient and robust. Secondly, both of global and local energy functions with the level set based method are used for extracting the liver region. Finally, the texture analysis method which is based on gray level co-occurrence matrix (GLCM) was used for refining the liver region boundary. The experimental results on 16 clinical planning CT for radiation therapy were used for demonstrating the efficiency of the proposed method both quantitatively and qualitatively.
本文将改进的基于水平集的方法与纹理分析技术相结合,提出了一种针对计算机断层扫描(CT)图像的多步骤肝脏分割方法。该算法的目的是克服肝脏区域与邻近组织之间强度相似所导致的分割问题,同时对肝脏区域内形状和大小的变化具有鲁棒性。首先,利用与L1范数的总变异量(TV-L1)获得初始肝脏区域,提高了算法的效率和鲁棒性;其次,采用基于水平集的全局能量函数和局部能量函数相结合的方法提取肝脏区域;最后,采用基于灰度共生矩阵(GLCM)的纹理分析方法对肝脏区域边界进行细化。通过16台临床规划CT放射治疗的实验结果,从定量和定性两方面证明了所提出方法的有效性。
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引用次数: 2
Auditory-based robust speech recognition system for ambient assisted living in smart home 基于听觉的智能家居环境辅助生活鲁棒语音识别系统
Pub Date : 2014-11-20 DOI: 10.1109/ICOT.2014.6956626
Hsien-Shun Kuo, Po-Hsun Sung, Sheng-Chieh Lee, Ta-Wen Kuan, Jhing-Fa Wang
An auditory-based feature extraction algorithm is proposed for enhancing the robustness of automatic speech recognition. In the proposed approach, the speech signal is characterized using a new feature referred to as the Basilar-membrane Frequency-band Cepstral Coefficient (BFCC). In contrast to the conventional Mel-Frequency Cepstral Coefficient (MFCC) method based on a Fourier spectrogram, the proposed BFCC method uses an auditory spectrogram based on a gammachirp wavelet transform in order to more accurately mimic the auditory response of the human ear and improve the noise immunity. In addition, a Hidden Markov Model (HMM) is used for both training and testing purposes. The evaluation results obtained using the AURORA 2 noisy speech database show that compared to the MFCC method, the proposed scheme improves the speech recognition rate by 15% on average given speech samples with Siganl-to-Noise Ratios (SNRs) ranging from 0 to 20 dB. Thus, the proposed method has significant potential for the development of robust speech recognition systems for ambient assisted living.
为了提高自动语音识别的鲁棒性,提出了一种基于听觉的特征提取算法。在提出的方法中,语音信号使用一种称为基底膜频带倒谱系数(BFCC)的新特征进行表征。与传统的基于傅里叶谱图的Mel-Frequency倒谱系数(MFCC)方法相比,BFCC方法采用基于伽玛基普小波变换的听觉谱图,更准确地模拟人耳的听觉反应,提高了抗噪声能力。此外,隐马尔可夫模型(HMM)用于训练和测试目的。基于AURORA 2噪声语音数据库的评估结果表明,在给定信噪比为0 ~ 20 dB的语音样本上,与MFCC方法相比,该方法的语音识别率平均提高了15%。因此,所提出的方法对于开发用于环境辅助生活的鲁棒语音识别系统具有重要的潜力。
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引用次数: 2
Facet-based trend modeling for cold start of recommendation in social media 基于人脸的社交媒体冷启动推荐趋势建模
Pub Date : 2014-11-20 DOI: 10.1109/ICOT.2014.6956615
Chen Chen, Hou Chunyan, Yu Xiaojie
Recommendation systems have been widely used in social media. One of recommendation tasks in social media is to provide relevant messages for users. Although many models have been proposed, how to make accurate recommendation for new users with little historical information still remains a big challenge, which is called the cold start problem. In order to address this problem, many models have been proposed, which use information of social media to improve the recommendation performance. However, lack of such versatility limits the successful application of these models. In this study, we propose an effective facet-based trend model to describe the trend interests of the entire user community in social media. Trend facet is the probability distribution of all users' preference to an attribute. In contrast to the general feature, the facet stems from the users' history and captures the interests to the attribute in social media. We evaluate our models in the context of personalized ranking of microblogs. Experiments on real-world data show that trend modeling can alleviate the cold start problem significantly. In addition, we compare the performance of user modeling and trend modeling, and find that user modeling outperforms trending model and the impact is slightly negative when combining trend modeling with user modeling.
推荐系统已广泛应用于社交媒体。社会化媒体的推荐任务之一就是为用户提供相关的信息。尽管已经提出了很多模型,但如何在历史信息很少的情况下对新用户进行准确的推荐仍然是一个很大的挑战,这被称为冷启动问题。为了解决这一问题,人们提出了许多利用社交媒体信息来提高推荐性能的模型。然而,缺乏这种通用性限制了这些模型的成功应用。在本研究中,我们提出了一个有效的基于面的趋势模型来描述社交媒体中整个用户群体的趋势兴趣。趋势面是所有用户对某一属性的偏好的概率分布。与一般特征相比,facet源于用户的历史,并捕获了社交媒体中对属性的兴趣。我们在微博个性化排名的背景下评估我们的模型。实际数据实验表明,趋势建模能显著缓解冷启动问题。此外,我们比较了用户建模和趋势建模的性能,发现用户建模优于趋势模型,并且趋势建模与用户建模相结合时影响略负。
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引用次数: 0
A fuzzy clustering algorithm via enhanced spatially constraint for brain MR image segmentation 基于增强空间约束的模糊聚类脑磁共振图像分割算法
Pub Date : 2014-11-20 DOI: 10.1109/ICOT.2014.6956610
Zexuan Ji, Jinyao Liu, Guannan Li
Fuzzy clustering has been extensively used in brain magnetic resonance (MR) image segmentation. However, due to the existence of noise and intensity inhomogeneity, many segmentation algorithms suffer from limited accuracy. In this paper, we propose a fuzzy clustering algorithm via enhanced spatially constraint for brain MR image segmentation. A novel spatial factor is proposed by incorporating the spatial information with a simple metric, which is fast and easy to implement. By taking the spatial direction into account based on the posterior and prior probabilities, the proposed method can preserve more details and overcome the over-smoothing disadvantage. Finally, the fuzzy objective function is integrated with the bias field estimation model to overcome intensity inhomogeneity in the image. Experimental results demonstrate that the proposed algorithm can substantially improve the accuracy of brain MR image segmentation.
模糊聚类在脑磁共振图像分割中得到了广泛的应用。然而,由于噪声和强度不均匀性的存在,许多分割算法的精度有限。本文提出了一种基于增强空间约束的模糊聚类算法用于脑磁共振图像分割。提出了一种新的空间因子,将空间信息与一个简单的度量相结合,实现速度快,易于实现。该方法基于后验概率和先验概率考虑了空间方向,保留了更多的细节,克服了过度平滑的缺点。最后,将模糊目标函数与偏置场估计模型相结合,克服图像的强度不均匀性。实验结果表明,该算法能显著提高脑磁共振图像分割的精度。
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引用次数: 1
Multispectral images based bridge detection method with RX detector 基于多光谱图像的RX检测器桥检测方法
Pub Date : 2014-11-20 DOI: 10.1109/ICOT.2014.6954693
Wei Wei, Yanning Zhang, Lei Zhang, Hangqi Yan, Bobo Wang
Bridge plays an important role in people's life. The automatic bridge detection has great value especially in disaster situation. In this paper, we propose an automatic bridge detection method in multispectral image to detect bridges over water. First, we extract the water region using NDWI index method by taking the advantage of the spectrum properties of water. Second, the water region is extended to include the bridges over water and the extended water region is adaptively segmented to locate the bridges roughly. Then, we separate the suspects into two kinds: Suspects along the bounder of the extended water region or the ones inside in this region, which are processed with different strategy. Partial interior suspects of the extended water region are extracted by the proposed RX detector. Finally, the context information of bridges is introduced to get the final decision. The experimental results on the TM images demonstrate the effectiveness of the proposed method.
桥牌在人们的生活中扮演着重要的角色。桥梁自动检测具有重要的应用价值,特别是在灾害情况下。本文提出了一种基于多光谱图像的水上桥梁自动检测方法。首先,利用水体的光谱特性,利用NDWI指数法提取水体区域;其次,将水域扩展到包括水上桥梁,并对扩展的水域进行自适应分割,大致定位桥梁。然后,我们将嫌疑人分为两类:沿扩展水域边界的嫌疑人和在扩展水域内的嫌疑人,并采用不同的处理策略。利用所提出的RX检测器提取了扩展水区的部分内部怀疑点。最后,引入桥梁的环境信息,得到最终的决策。在TM图像上的实验结果验证了该方法的有效性。
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引用次数: 1
A fusion algorithm of PET-CT based on dual-tree complex wavelet transform and self-adaption Gaussian membership function 基于双树复小波变换和自适应高斯隶属函数的PET-CT融合算法
Pub Date : 2014-11-20 DOI: 10.1109/ICOT.2014.6956638
Xingyu Wei, T. Zhou, Huiling Lu
This article proposed a new fusion algorithm of PET/CT based on dual-tree complex wavelet transform and self-adaption Gaussian membership function. Firstly, preprocessed and registered PET and CT image of non-small cell lung cancer. Secondly, used dual-tree complex wavelet transform to decompose PET and CT image in order to get the low-frequency and high-frequency components. Thirdly, using self-adaption Gaussian membership function to fuse low-frequency components. Finally, using two experiments to verify validity and feasibility of the proposed algorithm. The experiments results shown that the algorithm is efficiency.
提出了一种基于双树复小波变换和自适应高斯隶属函数的PET/CT融合算法。首先,对非小细胞肺癌的PET和CT图像进行预处理和配准。其次,利用双树复小波变换对PET和CT图像进行分解,得到低频和高频分量;第三,利用自适应高斯隶属函数融合低频分量。最后,通过两个实验验证了所提算法的有效性和可行性。实验结果表明,该算法是有效的。
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引用次数: 2
Frowning expression detection based on SOBEL filter for negative emotion recognition 基于SOBEL滤波的皱眉表情检测及其负面情绪识别
Pub Date : 2014-11-20 DOI: 10.1109/ICOT.2014.6956627
Shu-Chiang Chung, S. Barma, Ta-Wen Kuan, Ting-Wei Lin
This paper proposes a novel method to improve happiness status by detection negative emotional status based on frowning lines on face and a new term called facial expression factor (FEF). The FEF correlates the frowning and with emotional status. The frowning lines are detected using SOBEL filter and FEF factors are calculated from selected frowning lines to know the actual emotional status. Thus the negative emotional state are detected which could help to promote the happiness further. The experiment is conducted on 10 participants. In total 40 images (including 20 neutral and 20 frowning expression) are considered for experiment. The results show that the emotional status of 8 persons out of 10 participants is recognized correctly. Further, the wrong recognition results are corrected by tuning the threshold. Hence, the results depict the recognition accuracy up to 80%. The proposed work is based on simple training which also reduces the training time cost effectively. Furthermore, the proposed method is able to detect more complex facial expression (e.g., forced smile) using FEF. The tuning of threshold makes the method more effective. Therefore, such results show its effectiveness by detecting negative emotional state to promote the happiness.
本文提出了一种基于面部皱纹和面部表情因子(FEF)的消极情绪状态检测方法来提高幸福感。FEF将皱眉和情绪状态联系起来。使用SOBEL滤波检测皱眉线,并从选择的皱眉线中计算FEF因子来了解实际情绪状态。因此,消极的情绪状态被发现,这有助于进一步促进幸福。这个实验有10个参与者。总共有40张图片(包括20张中性表情和20张皱眉表情)被考虑用于实验。结果表明,10名参与者中有8人的情绪状态被正确识别。进一步,通过调整阈值修正错误的识别结果。结果表明,该方法的识别准确率可达80%。所提出的工作基于简单的培训,有效地减少了培训时间成本。此外,该方法还可以使用FEF检测更复杂的面部表情(如强迫微笑)。阈值的调整使该方法更加有效。因此,这样的结果显示了其通过检测负面情绪状态来促进幸福感的有效性。
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引用次数: 5
Online object tracking based on L1-loss SVMs with motion constraints 基于运动约束的l1损失支持向量机在线目标跟踪
Pub Date : 2014-11-20 DOI: 10.1109/ICOT.2014.6956599
Tao Zhuo, Peng Zhang, Yanning Zhang, Wei Huang
Orange technologies focus on individual behavior analysis, and the core of which is object tracking, especially arbitrary object tracking. One of the popular solution for arbitrary object tracking is tracking by detection. These approaches regard the tracking problem as a detection task, and use the online learning methods to adapt the classifier to various object appearance changes. However, due to lack of prior knowledge and unpredictable appearance changes, it is always hard to get accurate target location during the whole tracking process. In this paper, we incorporate a motion model into the tracking by detection framework. Besides object prediction, the motion model also guides the model updating process to guarantee the performance of the classifier. Experimentally, we show that our algorithm is able to outperform state of art trackers on benchmark data sets.
橙色技术侧重于个体行为分析,其核心是对象跟踪,特别是任意对象跟踪。任意目标跟踪的常用解决方案之一是检测跟踪。这些方法将跟踪问题视为检测任务,并使用在线学习方法使分类器适应各种物体外观变化。然而,由于缺乏先验知识和不可预测的外观变化,在整个跟踪过程中始终难以获得准确的目标位置。在本文中,我们将运动模型融入到检测框架的跟踪中。除了目标预测,运动模型还指导模型更新过程,保证分类器的性能。实验表明,我们的算法能够在基准数据集上优于最先进的跟踪器。
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引用次数: 0
Builing the Moble App system of postive social coummity by using social capital theory 运用社会资本理论构建积极社会社区的手机App系统
Pub Date : 2014-11-20 DOI: 10.1109/ICOT.2014.6956639
H. Huang, Tsung-Han Hsieh
Users can use social network sites automatically, it comes from user's habit, it's a no-conscious action (Wohn et al., 2012). Therefore, users have interactions in social networks sites, it makes life well-being. At the same time, it creates postive effects. For the reason, there are more and more people who like to participate in social networks sites. In the research, the study try to use the concept of social capital theoy to build a Moble App system that is conform the good design principle and possesses the capabitly to transmiting social capital throgh internet interactions.
用户可以自动使用社交网站,它来自于用户的习惯,是一种无意识的行为(Wohn et al., 2012)。因此,用户在社交网站上进行互动,使生活幸福。同时,它也产生了积极的影响。因此,越来越多的人喜欢参加社交网站。在研究中,本研究试图运用社会资本理论的概念,构建一个符合良好设计原则,并具有通过互联网互动传递社会资本能力的移动App系统。
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引用次数: 0
期刊
2014 International Conference on Orange Technologies
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