Flickr数据上的社交事件检测:双结构约束多模态特征编码

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"这篇研究论文‘Dual Structure Constrained Multimodal Feature Coding for Social Event Detection from Flickr Data’由郑国扬、李青、吕镇鲁、马云和刘文茵等人发表,探讨了从Flickr数据中检测社会事件的新型框架。该框架主要分为三个阶段,旨在从类似Flickr的异质性特征模态中发现事件。" 在这项工作中,研究人员首先提出了一个创新的方法,构建了多个二分图来处理不同特征模态,如图像、文本和元数据等,以融合这些多模态特征。这种方法有助于从海量的Flickr数据中提取出更丰富的信息。通过这种方式,可以更好地理解事件的上下文和含义,因为社会事件通常涉及到视觉、文本等多个方面的信息。 接下来,考虑到字典和数据的几何结构,他们设计了一个双结构约束的多模态特征编码模型。这个模型在目标函数中融入了相应的正则化项,目的是学习具有区分性的特征编码。这样的编码模型能够帮助识别和区分不同的事件模式,提高事件检测的准确性。 最后,为了发现真实世界中的事件,研究者采用了两种聚类模型:一种是利用密度信息的聚类模型,它可以根据数据点之间的相对紧密程度来识别事件;另一种则是基于标签知识的聚类模型,它利用已知的标签信息来指导聚类过程。此外,他们还引入了数据恢复残差模型,以进一步优化结果,确保所发现的事件更加符合实际。 实验结果显示,提出的社交事件检测方法在MediaEval2014 SED数据集上取得了最佳性能,这表明该框架在实际应用中具有很大的潜力。该研究归类于信息检索和搜索领域的聚类分析,对于理解和处理大规模社交媒体数据中的复杂事件具有重要的理论与实践意义。

The starting configuration of this puzzle is a row of cells, with disks located on cells through . The goal is to move the disks to the end of the row using a constrained set of actions. At each step, a disk can only be moved to an adjacent empty cell, or to an empty cell two spaces away if another disk is located on the intervening square. Given these restrictions, it can be seen that in many cases, no movements will be possible for the majority of the disks. For example, from the starting position, the only two options are to move the last disk from cell to cell , or to move the second-to-last disk from cell to cell . 1. [15 points] Write a function solve_identical_disks(length, n) that returns an optimal solution to the above problem as a list of moves, where length is the number of cells in the row and n is the number of disks. Each move in the solution should be a twoelement tuple of the form (from, to) indicating a disk movement from the cell from to the cell to. As suggested by its name, this function should treat all disks as being identical. Your solver for this problem should be implemented using a breadth-first graph search. The exact solution produced is not important, as long as it is of minimal length. Unlike in the previous two sections, no requirement is made with regards to the manner in which puzzle configurations are represented. Before you begin, think carefully about which data structures might be best suited for the problem, as this choice may affect the efficiency of your search

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