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Combining KNN algorithm and other classifiers 结合KNN算法和其他分类器
Pub Date : 2010-10-11 DOI: 10.1109/COGINF.2010.5599804
Zhiyong Yan, Congfu Xu
In this paper, we propose KNC algorithm for combining KNN algorithm and other three classifiers (C4.5 algorithm, Naive Bayes classifier and SVM) based on their classification capabilities on different types of instances. According to labels of instances and their K nearest neighbors, we divide instances into three types, S-, DS- and D-type. The classification capabilities of KNN algorithm on S-type instances are the best, while ones on D-type and DS-type are usually worse than other three classifiers. KNC algorithm uses KNN algorithm to classify S- and DS-type instances, and uses other classifiers to classify D-type instances. KNC algorithm utilizes classification capability of KNN algorithm on S-type instances and utilizes classification capabilities of other three classifiers on D-type instances. Experimental results on 20 UCI data sets demonstrate utility and feasibility of KNC algorithm.
本文提出KNC算法,将KNN算法与其他三种分类器(C4.5算法、朴素贝叶斯分类器和支持向量机)根据其对不同类型实例的分类能力进行组合。根据实例及其K个近邻的标签,我们将实例分为S型、DS型和d型三种类型。KNN算法对s型实例的分类能力是最好的,而对d型和ds型的分类能力通常比其他三种分类器差。KNC算法使用KNN算法对S型和ds型实例进行分类,使用其他分类器对d型实例进行分类。KNC算法在s型实例上利用KNN算法的分类能力,在d型实例上利用其他三种分类器的分类能力。在20个UCI数据集上的实验结果验证了KNC算法的实用性和可行性。
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引用次数: 19
Locally Assembled Binary feature with feed-forward cascade for pedestrian detection in intelligent vehicles 基于前馈级联的局部组合二值特征在智能车辆行人检测中的应用
Pub Date : 2010-07-07 DOI: 10.1109/COGINF.2010.5599695
Liping Yu, Feng Zhao, Zhiyong An
Detecting pedestrians in images is a challenging task, especially for the intelligent vehicle environment where there is a real-time requirement which limits the computational complexity of algorithms. In this paper, we demonstrate a near real-time and robust pedestrian detection system in the context of intelligent vehicle. This is achieved by integrating Locally Assembled Binary (LAB) features with a feed-forward cascade structure. LAB feature, which comprises several neighboring binary Haar features with a similar idea to Local Binary Pattern (LBP), is not only efficient in evaluation, but also very discriminative for pedestrian/non-pedestrian classification. Furthermore, a feed-forward cascade structure, which can exploit both the stage-wise and the cross-stage information, is presented to build on an efficient detector. Experimental results demonstrate the effectivity and efficiency of the proposed method.
图像中的行人检测是一项具有挑战性的任务,特别是对于智能车辆环境,它对实时性的要求限制了算法的计算复杂度。在本文中,我们展示了一个在智能车辆背景下的近实时和鲁棒的行人检测系统。这是通过将局部组装二进制(LAB)特征与前馈级联结构相结合来实现的。LAB特征由多个相邻的二进制Haar特征组成,其思想与局部二值模式(Local binary Pattern, LBP)相似,不仅具有高效的评价能力,而且对行人/非行人分类具有很强的判别能力。在此基础上,提出了一种前馈级联结构,该结构既可以利用级间信息,也可以利用级间信息,从而构建了一个高效的检测器。实验结果证明了该方法的有效性和高效性。
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引用次数: 11
Cognitive skills promotion by means of collaborative technology Web 2.0 tools 借助协同技术Web 2.0工具提升认知技能
Pub Date : 2010-07-07 DOI: 10.1109/COGINF.2010.5599775
I. Bernabe-Munoz
This work aims to launch a line of research dedicated to investigate the psychological aspects involved in teacher learning mediated by information and communication technologies (ICTs). This study aims to contribute to the analysis of the cognitive, emotional and motivational specific aspects of learning with ICT. The line of investigation starts up with a study on the development of creativity through ICT. The study focuses on proposing a theoretical model applicable to learning through ICT, alternative to traditional learning theories that do not address the complexity of incorporating new technologies and also aims to respond to real needs of the current educational community. Knowing which is the ICT role in the teaching and learning process will allow to fully enjoy its benefits while minimizing the potential difficulties, so as to improve both the teaching and learning.
这项工作旨在开展一系列研究,专门调查信息和通信技术(ict)介导的教师学习中涉及的心理方面。本研究旨在分析ICT学习的认知、情绪和动机的具体方面。调查的路线开始于通过信息通信技术开发创造力的研究。该研究的重点是提出一个适用于通过ICT学习的理论模型,替代传统的学习理论,这些理论没有解决纳入新技术的复杂性,也旨在响应当前教育界的实际需求。了解资讯及通讯科技在教与学过程中的角色,可以让我们充分享受资讯及通讯科技带来的好处,同时尽量减少潜在的困难,从而改善教与学。
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引用次数: 0
Mining for high complexity regions using entropy and box counting dimension quad-trees 利用熵和盒计数维四叉树挖掘高复杂度区域
Pub Date : 2010-07-07 DOI: 10.1109/COGINF.2010.5599745
R. Vetro, W. Ding, D. Simovici
This paper introduces an algorithm for capturing high complexity regions of a data domain. In this work, we focus on domains in R2. In particular, we analyze 2-dimensional image domains. Two different methods for mining are considered. The first method performs an information-theoretic analysis based on entropy to find diverse areas. The second method applies the concept of box-counting dimension related to fractal geometry. We propose the use of a quad-tree as main search structure where complex areas are represented by leaves with high feature1 values at the highest level on the tree. Nodes that refer to specific sub-domains are split when the level of the analyzed feature exceeds a chosen threshold. The relationship between the threshold and the number of pixels located in high value feature sub-domains at the highest level on the resultant quad-tree is demonstrated on test images for both methods. Experimental results also show the relation between the former measurements and characteristics of the images. Finally, we identify a correlation between the methods presented.
本文介绍了一种捕获数据域中高复杂度区域的算法。在这项工作中,我们关注R2中的域。特别地,我们分析了二维图像域。考虑了两种不同的采矿方法。第一种方法是基于熵的信息论分析来寻找不同的区域。第二种方法应用与分形几何相关的盒数维的概念。我们建议使用四叉树作为主要搜索结构,其中复杂区域由树的最高层具有高特征值的叶子表示。当所分析的特征的级别超过选定的阈值时,将拆分引用特定子域的节点。在两种方法的测试图像上展示了阈值与结果四叉树上位于最高水平的高值特征子域的像素数量之间的关系。实验结果还表明了前两种测量方法与图像特征之间的关系。最后,我们确定了所提出的方法之间的相关性。
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引用次数: 2
Predicting embedding strength in audio steganography 预测音频隐写术中的嵌入强度
Pub Date : 2010-07-07 DOI: 10.1109/COGINF.2010.5599777
Mengyu Qiao, A. Sung, Qingzhong Liu
As a serious concern of information security, steganography provides a covert communication channel for cyber-terrorism and cyber-crime. The widespread use enables MP3 compressed audio to become an excellent carrier for audio steganography on the Internet. Since embedding capacity is an important measure to evaluate the performance of steganographic systems, and embedding ratio is commonly used when comparing the accuracy of different steganalysis algorithms. In this paper, we present a scheme to predict embedding strength based on feature mining in MDCT transform domain. We generate reference signals by reversing and repeating quantification process, and derive the reference based accumulative features from the difference between source signal and reference signal. Finally, a dynamic evolving neuron-fuzzy inference system is applied to predict embedding strength of MP3 compressed audio. Experimental results show that our approach obtains good prediction of the embedding strength in the steganograms.
隐写技术作为信息安全的一个严重问题,为网络恐怖主义和网络犯罪提供了隐蔽的传播渠道。MP3压缩音频的广泛使用使其成为互联网上音频隐写的优良载体。由于嵌入容量是评价隐写系统性能的重要指标,在比较不同隐写算法的准确率时,通常采用嵌入比。本文提出了一种基于MDCT变换域特征挖掘的嵌入强度预测方案。我们通过反向和重复量化过程生成参考信号,并从源信号和参考信号的差中导出基于参考的累积特征。最后,应用动态演化神经元模糊推理系统预测MP3压缩音频的嵌入强度。实验结果表明,该方法可以很好地预测隐写图的嵌入强度。
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引用次数: 5
A DRM model based on proactive secret sharing scheme for P2P networks 基于主动秘密共享方案的P2P网络DRM模型
Pub Date : 2010-07-07 DOI: 10.1109/COGINF.2010.5599791
Ling Ma, Shouxun Liu, Yongbin Wang
The development of P2P technology has brought a significant revolution to Internet, which effectively improves data-sharing in networks. However, it also enables piracy products to spread quickly all over the networks. Therefore, it is urgent to design digital rights management (DRM) for P2P network. Recently, many DRM products for P2P have been investigated, but there are some disadvantages. A new DRM model based on proactive secret sharing scheme is proposed in this paper. This verifiable DRM model ensures the validation of sub-keys. The model enables the users to obtain the key effectively and utilize the advantage of P2P networks.
P2P技术的发展给互联网带来了一场重大的革命,有效地改善了网络中的数据共享。然而,这也使得盗版产品在网络上迅速传播。因此,为P2P网络设计数字版权管理(DRM)迫在眉睫。近年来,人们研究了许多针对P2P的DRM产品,但都存在一些不足。提出了一种基于主动秘密共享方案的DRM模型。这种可验证的DRM模型确保了子密钥的验证。该模型使用户能够有效地获取密钥,充分利用P2P网络的优势。
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引用次数: 7
Who dominates the retinotectal mapping? 谁主导着视网膜顶的映射?
Pub Date : 2010-07-07 DOI: 10.1109/COGINF.2010.5599831
Sanming Song, H. Yao
Retina ganglia cells (RGCs) connect to the tectum neurons in the midbrain through 1–1 strict topic mapping, which benefits the precise information transmission and is called retinotopic mapping. It's significant to understand the underlying mechanisms that contributing to the topic mapping. Inspired by the experimental observations given by [Nicol et al 2007 Nat. Neurosci. 10(3):340], we divide the retinotectal mapping into three almost independent stages, axon overshooting, axon retraction, and the final refinement of axons and arborization. In order to analyze the roles that forward signaling, reverse signaling and neural activity plays in different stages, an axon retraction model and a refinement procedure have been proposed to simulate the retinotopic mapping process. We testify the asymmetry of gradients between forward signaling and reverse signaling, and find that it is the forward signaling that dominates the axon retraction. Also, the refinement procedure demonstrates that the reverse-signaling-induced gradient branching and the synapse-dependent neural activity lead the RGC axons projecting to the topic target tectum neurons.
视网膜神经节细胞(RGCs)通过1-1严格主题映射与中脑顶盖神经元相连,有利于信息的精确传递,称为视网膜主题映射。理解促成主题映射的底层机制非常重要。受[Nicol et al . 2007 Nat. Neurosci. 10(3):340]给出的实验观察的启发,我们将视网膜顶映射分为三个几乎独立的阶段,轴突过冲,轴突缩回,以及轴突的最终细化和树突化。为了分析正向信号、反向信号和神经活动在不同阶段所起的作用,我们提出了一个轴突缩回模型和一个改进程序来模拟视网膜定位过程。我们证明了正向信号和反向信号之间梯度的不对称性,并发现正向信号主导轴突收缩。此外,细化过程表明,反向信号诱导的梯度分支和突触依赖的神经活动导致RGC轴突投射到主题目标顶盖神经元。
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引用次数: 0
Weighting imputation methods and their evaluation under shell-neighbor machine 壳邻机下的加权插值方法及其评价
Pub Date : 2010-07-07 DOI: 10.1109/COGINF.2010.5599790
Shichao Zhang, Manlong Zhu
The paper studies three typical weighting strategies for Shell-Neighbor Imputation (SNI) algorithm, while there are many weighting modes that can be used in the SNI. To best capture the imputation efficiency, a new metrics, called goodess, is proposed for evaluating imputation algorithms. We conduct some experiments for examining the proposed approached, and demonstrate that (1) distance-frequency-weighting strategy is the best one for the shell-neighbor imputation; (2) the goodness is much better than the RMSE if there is a few individual values of serious deviation, otherwise, the goodness is the same as the RMSE at measuring the imputation efficiency.
本文研究了Shell-Neighbor Imputation (SNI)算法的三种典型加权策略,SNI算法中可以使用的加权模式有很多种。为了更好地捕捉插值效率,提出了一种新的度量方法,称为良度,用于评价插值算法。实验结果表明:(1)距离-频率加权策略是最适合壳邻估算的方法;(2)在衡量归算效率时,如果个别值偏差严重,则优度远好于RMSE,否则优度与RMSE相同。
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引用次数: 0
Improvement of bearing-only tracking fusion strategy based on bionics with infrared sensor 基于仿生与红外传感器的全方位跟踪融合策略改进
Pub Date : 2010-07-07 DOI: 10.1109/COGINF.2010.5599768
Hui Chen, Zhanming Li
This paper∗ mainly studies some improvements of bearing-only data association with a single passive sensor to overcome the existing problems in the applications of JPDA approaches for bearing-only target locating and tracking. First, some adaptive modified rules are presented by deep analysis of JPDA application. This bearing-only association approach reduces computational complexity clearly under the premise of better tracking precision. Then, an effective track management strategy is designed. This strategy helps to set up a clear tracking level and manage historical the information of the target. The application of the proposed approach in a simulation and engineering system proves its effectiveness and practicability.
本文*主要研究了单被动传感器的全方位数据关联的一些改进,以克服JPDA方法在全方位目标定位与跟踪中存在的问题。首先,通过对JPDA应用的深入分析,提出了一些自适应的修正规则。这种纯方位关联方法在保证较好的跟踪精度的前提下,明显降低了计算复杂度。在此基础上,设计了有效的跟踪管理策略。该策略有助于建立清晰的跟踪层次,并对目标的历史信息进行管理。在仿真和工程系统中的应用证明了该方法的有效性和实用性。
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引用次数: 1
In search for effective granularity with DTRS 在寻找有效的粒度与DTRS
Pub Date : 2010-07-07 DOI: 10.1109/COGINF.2010.5599696
Bing Zhou, Yiyu Yao
Decision Theoretic Rough Set (DTRS) model provides a three-way decision approach to classification problems, which allows the classifier to make a deferment decision on the hard cases, rather than forced to make an immediate determination. The deferred cases must be reexamined by collecting further information. Although the formulation of DTRS is intuitively appealing, a fundamental question that remains is how to determine the classification of the deferment cases. In this paper, we introduce an adaptive learning method that automatically deals with the deferred cases by searching for the effective granularity. A decision tree is constructed for classification. At each level, we sequentially choose the attributes that provide the most effective granularity. A subtree is added recursively if the conditional probability lies in between of the two threshold values. A branch reaches its leaf node until all the examples are correctly classified. This learning process is illustrated by a given example.
决策理论粗糙集(DTRS)模型为分类问题提供了一种三向决策方法,它允许分类器对困难情况做出延迟决策,而不是被迫立即做出决定。必须通过收集进一步的资料重新审查被推迟的案件。虽然DTRS的提法直观上很吸引人,但仍然存在一个基本问题,即如何确定延期案件的分类。本文引入了一种自适应学习方法,通过搜索有效粒度来自动处理延迟情况。构造决策树进行分类。在每个级别上,我们依次选择提供最有效粒度的属性。如果条件概率位于两个阈值之间,则递归地添加子树。一个分支到达它的叶节点,直到所有的例子都被正确分类。这个学习过程是通过一个例子来说明的。
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引用次数: 4
期刊
9th IEEE International Conference on Cognitive Informatics (ICCI'10)
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