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Proceedings of the Fifth International Conference on Information Fusion. FUSION 2002. (IEEE Cat.No.02EX5997)最新文献

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Land use and land cover change prediction with the theory of evidence: a case study in an intensive agricultural region of France 基于证据理论的土地利用和土地覆盖变化预测:以法国集约化农业区为例
L. Hubert‐Moy, S. Corgne, G. Mercier, B. Solaiman
In intensive agricultural regions, accurate assessment of the spatial and temporal variation of winter vegetation covering is a key indicator of water transfer processes, essential for controlling land management and helping local decision making. Spatial prediction modeling of winter bare soils is complex and it is necessary to introduce uncertainty in modeling land use and cover changes, especially as high spatial and temporal variability are encountered. Dempster's fusion rule is used in the present study to spatially predict the location of winter bare fields for the next season on a watershed located in an intensive agricultural region. It expresses the model as a function of past-observed bare soils, field size, distance from farm buildings, agro-environmental action, and production quotas per ha. The model well predicted the presence of bare soils on 4/5 of the total area. The spatial distribution of misrepresented fields is a good indicator for identifying change factors.
在集约化农区,准确评价冬季植被覆盖的时空变化是流域调水过程的重要指标,对土地管理和地方决策具有重要意义。冬季裸土的空间预测建模是复杂的,在土地利用和覆被变化的建模中需要引入不确定性,特别是在高时空变异性的情况下。本研究采用Dempster融合规则对集约化农业区流域下一季冬季裸地的位置进行空间预测。它将模型表示为过去观察到的裸露土壤、田地大小、与农场建筑物的距离、农业环境行动和每公顷生产配额的函数。该模型很好地预测了总面积的4/5存在裸土。误表示场的空间分布是识别变化因素的一个很好的指标。
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引用次数: 21
Hypothesis management for information fusion 信息融合的假设管理
E. Jones, N. Denis, D. Hunter
The efficient management of large collections of fusion hypotheses presents a critical challenge for scaling high-level information fusion systems to solve large problems. We motivate this challenge in the context of two ALPHATECH research projects, and discuss several partial solutions. A recurring theme is the exploitation of space-efficient, factored representations of multiple hypotheses to enable efficient search for good hypotheses.
大规模融合假设集合的有效管理是扩展高级信息融合系统以解决大型问题的关键挑战。我们在两个alphaech研究项目的背景下激发了这一挑战,并讨论了几个部分解决方案。一个反复出现的主题是利用空间效率,多个假设的因子表示,以便有效地搜索好的假设。
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引用次数: 5
Bayesian approaches to track existence - IPDA and random sets 跟踪存在性的贝叶斯方法——IPDA和随机集
S. Challa, B. Vo, Xuezhi Wang
Most target tracking algorithms implicitly assume that target exists. There are only a few techniques that address the target existence problem along with target tracking. For example, (Integrated Probabilistic Data Association) IPDA filter addresses the target tracking and target existence problems simultaneously and it does so under at most one target assumption. In recent times random sets have been proposed as a general framework for multiple target tracking problem. However, its relationship to well understood existing tracking algorithms like IPDA has not been explored. In this paper, we show that under appropriate conditions random sets provide appropriate mathematical framework for solving the joint target existence and state estimation problem and subsequently show that it results in IPDA under appropriate simplifying assumptions.
大多数目标跟踪算法都隐含地假设目标存在。只有少数技术可以在目标跟踪的同时解决目标存在问题。例如,集成概率数据关联(Integrated Probabilistic Data Association, IPDA)滤波器同时解决了目标跟踪和目标存在的问题,它最多在一个目标假设下进行。近年来,随机集被提出作为多目标跟踪问题的通用框架。然而,它与现有的跟踪算法(如IPDA)之间的关系尚未得到探讨。本文证明了在适当的条件下,随机集为解决联合目标存在和状态估计问题提供了适当的数学框架,并在适当的简化假设下得到了IPDA。
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引用次数: 44
Dependence in network reliability 网络可靠性依赖性
N. Singpurwalla
It is fairly easy to calculate the reliability of a network with independent nodes by using a technique called pivoting. However, when there is dependence, this calculation will prove inaccurate and a model for the dependence is required. This paper considers the issues involved in developing a suitable model. Particular emphasis is placed on ensuring the calculations and distributions involved do not become intractable for large networks. Various potential distributions are discussed. Strategies are suggested for simplifying the dependence. A model for cascading failures is proposed.
通过使用称为pivot的技术,计算具有独立节点的网络的可靠性是相当容易的。然而,当存在依赖性时,这种计算将被证明是不准确的,并且需要一个依赖性的模型。本文考虑了开发一个合适的模型所涉及的问题。特别强调的是确保所涉及的计算和分布在大型网络中不会变得难以处理。讨论了各种可能的分布。提出了简化依赖关系的策略。提出了级联失效模型。
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引用次数: 6
Intelligent systems technology for higher level fusion 面向更高层次融合的智能系统技术
C. Anken, N. Gemelli, P. LaMonica, R. Mineo, J. Spina
The premise of this paper is that a combination of information extraction techniques, knowledge bases and natural language processing technology can assist the intelligence analyst by providing higher level fusion capabilities to support the decision making process. The paper examines programs and the tools that have evolved from these programs being researched by the Air Force Research Laboratory's Information Directorate. These programs include DARPA sponsored High Performance Knowledge Bases (HPKB), Rapid Knowledge Formation (RKF) and Evidence Extraction and Link Discovery (EELD). Some of the tools include the CYC knowledge base, Intelligent Mining Platform for the Analysis of Counter Terrorism (IMPACT) and the START natural language query system. By exploiting and leveraging the strengths of each system, we believe that a high level of information fusion is possible.
本文的前提是信息提取技术、知识库和自然语言处理技术的结合可以通过提供更高层次的融合能力来支持情报分析人员的决策过程。本文考察了由空军研究实验室信息理事会研究的项目和从这些项目发展而来的工具。这些项目包括DARPA赞助的高性能知识库(HPKB)、快速知识形成(RKF)和证据提取和链接发现(EELD)。这些工具包括CYC知识库、IMPACT (Intelligent Mining Platform for Analysis of counterterrorism)和START自然语言查询系统。通过利用和利用每个系统的优势,我们相信高水平的信息融合是可能的。
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引用次数: 6
Fusing cortex transform and intensity based features for image texture classification 融合皮质变换和基于强度的特征进行图像纹理分类
Md. Khayrul Bashar, N. Ohnishi
This paper proposes a new scheme of fusing cortex transform and brightness based features obtained by local windowing operation. Energy features are obtained by applying popular cortex transform technique within a sliding window rather than the conventional way, while we define three features namely directional surface density (DSD), normalised sharpness index (NSI), and normalized frequency index (NFI) as measures for pixel brightness variation. Fusion by simply vector tagging as well as by correlation is performed in the feature space and then classification is done using minimum distance classifier on the fused vectors. It is interesting that the brightness features, though inferior on some natural images, often produces smoother texture boundary in mosaic images, whereas energy features show the opposite behavior. This symmetrically inverse property is combined through vector fusion for robust classification of multi-texture images obtained from Brodatz album and VisTex database. Classification outcome with confusion matrix analysis shows the robustness of the scheme.
本文提出了一种融合皮质变换和局部窗化处理得到的亮度特征的新方案。能量特征是通过在滑动窗口内应用流行的皮质变换技术而不是传统方法获得的,而我们定义了三个特征,即定向表面密度(DSD)、归一化清晰度指数(NSI)和归一化频率指数(NFI)作为像素亮度变化的度量。在特征空间中进行简单向量标记融合和相关融合,然后利用最小距离分类器对融合后的向量进行分类。有趣的是,虽然亮度特征在某些自然图像上较差,但在拼接图像中往往产生更平滑的纹理边界,而能量特征则表现出相反的行为。通过向量融合将这种对称逆特性结合起来,对来自Brodatz相册和VisTex数据库的多纹理图像进行鲁棒分类。混淆矩阵分析的分类结果显示了该方案的鲁棒性。
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引用次数: 3
Monitoring and information fusion for search and rescue operations in large-scale disasters 面向大规模灾害搜救行动的监测与信息融合
F. D'Agostino, A. Farinelli, G. Grisetti, L. Iocchi, D. Nardi
The goal of the project, which is currently under development, is to design tools to monitor the situation after a large-scale disaster, with a particular focus on the task on situation assessment and high-level information fusion, as well as on the issues that arise in coordinating the agent actions based on the acquired information. The development environment is based on the RoboCup-Rescue simulator: a simulation environment used for the RoboCup-Rescue competition, allowing for the design of both agents operating in the scenario and simulators for modeling various aspects of the situation including the graphical interface to monitor the disaster site. Our project is focussed on three aspects: modeling in the simulator a scenario devised from the analysis of a real case study; an extension of the simulator enabling for the experimentation of various communication and information fusion schemes; a framework for developing agents that are capable of constructing a global view of the situation and of distributing specific information, to other agents in order to drive their actions.
目前正在开发的该项目的目标是设计监测大规模灾害后情况的工具,特别侧重于情况评估和高级信息融合的任务,以及在根据所获得的信息协调代理行动时出现的问题。开发环境基于RoboCup-Rescue模拟器:一个用于RoboCup-Rescue比赛的模拟环境,允许设计在场景中操作的代理和模拟器,以模拟情况的各个方面,包括监控灾难现场的图形界面。我们的项目主要集中在三个方面:在模拟器中建模一个从真实案例分析设计的场景;模拟器的扩展,可用于各种通信和信息融合方案的实验;一个开发代理的框架,这些代理能够构建全局视图,并将特定信息分发给其他代理,以驱动他们的行动。
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引用次数: 12
Isolated vowel recognition using linear predictive features and neural network classifier fusion 基于线性预测特征和神经网络分类器融合的孤立元音识别
In this work, various linear predictive feature vectors were used to train three different automated neural networks type classifiers for the task of isolated vowel recognition. The features used included linear prediction filter coefficients, reflection coefficients, log area ratios, and the linear predictive cepstrum. The three neural network classifiers used are the multilayer perceptron, radial basis function and the probabilistic neural network. The linear predictive cepstrum of dimension 12 is the best feature especially when training is done on clean speech and testing is done on noisy speech. Three different classifier fusion strategies (linear fusion, majority voting and weighted majority voting) were found to improve the performance. Linear fusion with varying weights is the best method and is most robust to noise.
在这项工作中,使用各种线性预测特征向量来训练三种不同的自动神经网络类型分类器来完成孤立元音识别任务。使用的特征包括线性预测滤波器系数、反射系数、对数面积比和线性预测倒谱。使用的三种神经网络分类器是多层感知器、径向基函数和概率神经网络。12维的线性预测倒谱是最好的特征,特别是在对干净语音进行训练和对有噪声语音进行测试时。找到了三种不同的分类器融合策略(线性融合、多数投票和加权多数投票)来提高性能。变权线性融合是最好的方法,对噪声的鲁棒性最强。
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引用次数: 7
Fusing and filtering arrogant classifiers 融合和过滤自大分类器
A. L. Magnus, M. Oxley
Given a finite collection of classifiers trained on n-class data, one wishes to fuse the classifiers to form a new classifier with improved performance. Typically, the fusion is performed on the output level using logical ANDs and ORs. Sometimes classifiers are arrogant and will classify a feature vector without any prior experience (data) to justify their decision. The proposed fusion is based on the arrogance of the classifier and the location of the feature vector in respect to training data. Given a feature vector x, if any one of the classifiers is an expert on x then that classifier should dominate the fusion. If the classifiers are confused at x then the fusion rule should be defined in such a way to reflect this confusion. If the classifier is arrogant, then its results should not be considered and, thus, filtered out from the fusion process. We give this fusion rule based upon the metrics of veracity and experience.
给定在n类数据上训练的有限分类器集合,人们希望融合这些分类器以形成具有改进性能的新分类器。通常,融合是使用逻辑and和or在输出级别上执行的。有时分类器很傲慢,会在没有任何先前经验(数据)的情况下对特征向量进行分类。所提出的融合是基于分类器的傲慢和特征向量相对于训练数据的位置。给定一个特征向量x,如果任何一个分类器是x的专家,那么该分类器应该在融合中占主导地位。如果分类器在x处混淆,则融合规则应该以反映这种混淆的方式定义。如果分类器是傲慢的,那么它的结果不应该被考虑,因此,从融合过程中过滤掉。我们给出了基于准确性和经验度量的融合规则。
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引用次数: 1
Distributed data fusion using support vector machines 基于支持向量机的分布式数据融合
Subhash Challa, M. Palaniswami, A. Shilton
The basic quantity to be estimated in the Bayesian approach to data fusion is the conditional probability density function (CPDF). Computationally efficient particle filtering approaches are becoming more important in estimating these CPDFs. In this approach, IID samples are used to represent the conditional probability densities. However, their application in data fusion is severely limited due to the fact that the information is stored in the form of a large set of samples. In all practical data fusion systems that have limited communication bandwidth, broadcasting this probabilistic information, available as a set of samples, to the fusion center is impractical. Support vector machines, through statistical learning theory, provide a way of compressing information by generating optimal kernal based representations. In this paper we use SVM to compress the probabilistic information available in the form of IID samples and apply it to solve the Bayesian data fusion problem. We demonstrate this technique on a multi-sensor tracking example.
贝叶斯数据融合方法中需要估计的基本量是条件概率密度函数(CPDF)。计算效率高的粒子滤波方法在估计这些cpdf方面变得越来越重要。在这种方法中,IID样本被用来表示条件概率密度。然而,由于信息以大样本的形式存储,它们在数据融合中的应用受到严重限制。在所有通信带宽有限的实际数据融合系统中,将这些概率信息作为一组样本广播到融合中心是不切实际的。支持向量机,通过统计学习理论,提供了一种通过生成最优的基于核的表示来压缩信息的方法。本文利用支持向量机对IID样本中可用的概率信息进行压缩,并应用于贝叶斯数据融合问题。我们在一个多传感器跟踪示例中演示了该技术。
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引用次数: 28
期刊
Proceedings of the Fifth International Conference on Information Fusion. FUSION 2002. (IEEE Cat.No.02EX5997)
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