社交媒体由于易于传播新信息而在公共领域迅速发展，这导致了谣言的流通。但是，从如此大量的信息中发现谣言正在成为越来越艰巨的挑战。以前的工作通常从传播信息中获得了宝贵的功能。应该注意的是，大多数方法仅针对传播结构，而忽略了谣言传播模式。这个有限的重点严重限制了传播数据的收集。为了解决这个问题，本研究的作者是促使探索谣言的区域化传播模式。具体而言，提出了一种新颖的区域增强的深图卷积网络（RDGCN），该网络（RDGCN）通过学习区域化的传播模式和火车来增强谣言的传播特征，从而通过无人看管的学习来学习传播模式。此外，源增强的残留图卷积层（SRGCL）旨在改善图形神经网络（GNN）的超平滑度，并增加了基于谣言检测方法的GNN的深度极限。 Twitter15和Twitter16上的实验表明，在谣言检测和早期谣言检测中，提出的模型的性能优于基线方法。

谣言在社交媒体的时代猖獗。谈话结构提供有价值的线索，以区分真实和假声明。然而，现有的谣言检测方法限制为用户响应的严格关系或过度简化对话结构。在这项研究中，为了减轻不相关的帖子施加的负面影响，基本上加强了用户意见的相互作用，首先将谈话线作为无向相互作用图。然后，我们提出了一种用于谣言分类的主导分层图注意网络，其提高了考虑整个社会环境的响应帖子的表示学习，并参加可以在语义上推断目标索赔的帖子。三个Twitter数据集的广泛实验表明，我们的谣言检测方法比最先进的方法实现了更好的性能，并且展示了在早期阶段检测谣言的优异容量。

Recently, online social media has become a primary source for new information and misinformation or rumours. In the absence of an automatic rumour detection system the propagation of rumours has increased manifold leading to serious societal damages. In this work, we propose a novel method for building automatic rumour detection system by focusing on oversampling to alleviating the fundamental challenges of class imbalance in rumour detection task. Our oversampling method relies on contextualised data augmentation to generate synthetic samples for underrepresented classes in the dataset. The key idea exploits selection of tweets in a thread for augmentation which can be achieved by introducing a non-random selection criteria to focus the augmentation process on relevant tweets. Furthermore, we propose two graph neural networks(GNN) to model non-linear conversations on a thread. To enhance the tweet representations in our method we employed a custom feature selection technique based on state-of-the-art BERTweet model. Experiments of three publicly available datasets confirm that 1) our GNN models outperform the the current state-of-the-art classifiers by more than 20%(F1-score); 2) our oversampling technique increases the model performance by more than 9%;(F1-score) 3) focusing on relevant tweets for data augmentation via non-random selection criteria can further improve the results; and 4) our method has superior capabilities to detect rumours at very early stage.

检测假新闻对于确保信息的真实性和维持新闻生态系统的可靠性至关重要。最近，由于最近的社交媒体和伪造的内容生成技术（例如Deep Fake）的扩散，假新闻内容的增加了。假新闻检测的大多数现有方式都集中在基于内容的方法上。但是，这些技术中的大多数无法处理生成模型生产的超现实合成媒体。我们最近的研究发现，真实和虚假新闻的传播特征是可以区分的，无论其方式如何。在这方面，我们已经根据社会环境调查了辅助信息，以检测假新闻。本文通过基于混合图神经网络的方法分析了假新闻检测的社会背景。该混合模型基于将图形神经网络集成到新闻内容上的新闻和BI定向编码器表示的传播中，以了解文本功能。因此，这种提出的方​​法可以学习内容以及上下文特征，因此能够在Politifact上以F1分别为0.91和0.93的基线模型和八西八角数据集的基线模型，分别超过了基线模型，分别在八西八学数据集中胜过0.93

人口级社会事件，如民事骚乱和犯罪，往往对我们的日常生活产生重大影响。预测此类事件对于决策和资源分配非常重要。由于缺乏关于事件发生的真实原因和潜在机制的知识，事件预测传统上具有挑战性。近年来，由于两个主要原因，研究事件预测研究取得了重大进展：（1）机器学习和深度学习算法的开发和（2）社交媒体，新闻来源，博客，经济等公共数据的可访问性指标和其他元数据源。软件/硬件技术中的数据的爆炸性增长导致了社会事件研究中的深度学习技巧的应用。本文致力于提供社会事件预测的深层学习技术的系统和全面概述。我们专注于两个社会事件的域名：\ Texit {Civil unrest}和\ texit {犯罪}。我们首先介绍事件预测问题如何作为机器学习预测任务制定。然后，我们总结了这些问题的数据资源，传统方法和最近的深度学习模型的发展。最后，我们讨论了社会事件预测中的挑战，并提出了一些有希望的未来研究方向。

推文是在线社交媒体中最简洁的交流形式，其中一条推文有可能制作或打破对话的话语。在线仇恨言论比以往任何时候都更容易访问，并且扼杀其传播对于社交媒体公司和用户进行友好沟通至关重要。除了最近的一条推文分类，无论导致这一点的推文线程/上下文如何，大多数研究都集中在对单个推文进行分类。遏制仇恨言论的经典方法之一是在仇恨言论邮寄后采用反应性策略。事实上的事实策略导致忽略了微妙的帖子，这些帖子并未显示出自己激发仇恨言论的潜力，但可能会在随后在帖子的答复中随后的讨论中进行预言。在本文中，我们提出了Dragnet ++，该论文旨在预测推文可以通过其未来的回复链引入的仇恨强度。它使用推文线程的语义和传播结构来最大化导致每个后续推文的仇恨强度的上下文信息。我们探索了三个公开可用的Twitter数据集 - 反种族主义包含有关社交媒体讨论在美国政治和COVID-19的背景期间关于种族主义言论的回答推文；反社会介绍了一个关于反社会行为的19000万推文的数据集；和反亚洲介绍了基于19日大流行期间的反亚洲行为的Twitter数据集。所有策划的数据集都包含Tweet线程的结构图信息。我们表明，Dragnet ++的表现大大优于所有最先进的基线。它比人相关系数的最佳基线降低了11 \％的利润率，而反种族主义数据集则在RMSE上降低了25 \％，而其他两个数据集则具有相似的性能。

Predicting personality traits based on online posts has emerged as an important task in many fields such as social network analysis. One of the challenges of this task is assembling information from various posts into an overall profile for each user. While many previous solutions simply concatenate the posts into a long document and then encode the document by sequential or hierarchical models, they introduce unwarranted orders for the posts, which may mislead the models. In this paper, we propose a dynamic deep graph convolutional network (D-DGCN) to overcome the above limitation. Specifically, we design a learn-to-connect approach that adopts a dynamic multi-hop structure instead of a deterministic structure, and combine it with a DGCN module to automatically learn the connections between posts. The modules of post encoder, learn-to-connect, and DGCN are jointly trained in an end-to-end manner. Experimental results on the Kaggle and Pandora datasets show the superior performance of D-DGCN to state-of-the-art baselines. Our code is available at https://github.com/djz233/D-DGCN.

Users' involvement in creating and propagating news is a vital aspect of fake news detection in online social networks. Intuitively, credible users are more likely to share trustworthy news, while untrusted users have a higher probability of spreading untrustworthy news. In this paper, we construct a dual-layer graph (i.e., the news layer and the user layer) to extract multiple relations of news and users in social networks to derive rich information for detecting fake news. Based on the dual-layer graph, we propose a fake news detection model named Us-DeFake. It learns the propagation features of news in the news layer and the interaction features of users in the user layer. Through the inter-layer in the graph, Us-DeFake fuses the user signals that contain credibility information into the news features, to provide distinctive user-aware embeddings of news for fake news detection. The training process conducts on multiple dual-layer subgraphs obtained by a graph sampler to scale Us-DeFake in large scale social networks. Extensive experiments on real-world datasets illustrate the superiority of Us-DeFake which outperforms all baselines, and the users' credibility signals learned by interaction relation can notably improve the performance of our model.

Nowadays, fake news easily propagates through online social networks and becomes a grand threat to individuals and society. Assessing the authenticity of news is challenging due to its elaborately fabricated contents, making it difficult to obtain large-scale annotations for fake news data. Due to such data scarcity issues, detecting fake news tends to fail and overfit in the supervised setting. Recently, graph neural networks (GNNs) have been adopted to leverage the richer relational information among both labeled and unlabeled instances. Despite their promising results, they are inherently focused on pairwise relations between news, which can limit the expressive power for capturing fake news that spreads in a group-level. For example, detecting fake news can be more effective when we better understand relations between news pieces shared among susceptible users. To address those issues, we propose to leverage a hypergraph to represent group-wise interaction among news, while focusing on important news relations with its dual-level attention mechanism. Experiments based on two benchmark datasets show that our approach yields remarkable performance and maintains the high performance even with a small subset of labeled news data.

假新闻是制作作为真实的信息，有意欺骗读者。最近，依靠社交媒体的人民币为新闻消费的人数显着增加。由于这种快速增加，错误信息的不利影响会影响更广泛的受众。由于人们对这种欺骗性的假新闻的脆弱性增加，在早期阶段检测错误信息的可靠技术是必要的。因此，作者提出了一种基于图形的基于图形的框架社会图，其具有多头关注和发布者信息和新闻统计网络（SOMPS-Net），包括两个组件 - 社交交互图（SIG）和发布者和新闻统计信息（PNS）。假设模型在HealthStory DataSet上进行了实验，并在包括癌症，阿尔茨海默，妇产科和营养等各种医疗主题上推广。 Somps-Net明显优于其他基于现实的图表的模型，在HealthStory上实验17.1％。此外，早期检测的实验表明，Somps-Net预测的假新闻文章在其广播仅需8小时内为79％确定。因此，这项工作的贡献奠定了在早期阶段捕获多种医疗主题的假健康新闻的基础。

Anomaly analytics is a popular and vital task in various research contexts, which has been studied for several decades. At the same time, deep learning has shown its capacity in solving many graph-based tasks like, node classification, link prediction, and graph classification. Recently, many studies are extending graph learning models for solving anomaly analytics problems, resulting in beneficial advances in graph-based anomaly analytics techniques. In this survey, we provide a comprehensive overview of graph learning methods for anomaly analytics tasks. We classify them into four categories based on their model architectures, namely graph convolutional network (GCN), graph attention network (GAT), graph autoencoder (GAE), and other graph learning models. The differences between these methods are also compared in a systematic manner. Furthermore, we outline several graph-based anomaly analytics applications across various domains in the real world. Finally, we discuss five potential future research directions in this rapidly growing field.

保持个人特征和复杂的关系，广泛利用和研究了图表数据。通过更新和聚合节点的表示，能够捕获结构信息，图形神经网络（GNN）模型正在获得普及。在财务背景下，该图是基于实际数据构建的，这导致复杂的图形结构，因此需要复杂的方法。在这项工作中，我们在最近的财务环境中对GNN模型进行了全面的审查。我们首先将普通使用的财务图分类并总结每个节点的功能处理步骤。然后，我们总结了每个地图类型的GNN方法，每个区域的应用，并提出一些潜在的研究领域。

Fake news detection has become a research area that goes way beyond a purely academic interest as it has direct implications on our society as a whole. Recent advances have primarily focused on textbased approaches. However, it has become clear that to be effective one needs to incorporate additional, contextual information such as spreading behaviour of news articles and user interaction patterns on social media. We propose to construct heterogeneous social context graphs around news articles and reformulate the problem as a graph classification task. Exploring the incorporation of different types of information (to get an idea as to what level of social context is most effective) and using different graph neural network architectures indicates that this approach is highly effective with robust results on a common benchmark dataset.

The stock market prediction has been a traditional yet complex problem researched within diverse research areas and application domains due to its non-linear, highly volatile and complex nature. Existing surveys on stock market prediction often focus on traditional machine learning methods instead of deep learning methods. Deep learning has dominated many domains, gained much success and popularity in recent years in stock market prediction. This motivates us to provide a structured and comprehensive overview of the research on stock market prediction focusing on deep learning techniques. We present four elaborated subtasks of stock market prediction and propose a novel taxonomy to summarize the state-of-the-art models based on deep neural networks from 2011 to 2022. In addition, we also provide detailed statistics on the datasets and evaluation metrics commonly used in the stock market. Finally, we highlight some open issues and point out several future directions by sharing some new perspectives on stock market prediction.

随着社交媒体的发展，社交沟通已经改变。尽管这有助于人们的沟通和信息访问，但它也提供了传播谣言的理想平台。在正常或关键的情况下，谣言会影响人们的判断力，甚至危害社会保障。但是，自然语言是高维且稀疏的，并且在社交媒体上可以以数百种方式表达同样的谣言。因此，质疑当前谣言检测模型的鲁棒性和概括。我们提出了一个小说\ textbf {h} ierarchical \ textbf {a} dversarial \ textbf {t}降雨法，用于\ textbf {r} umor \ textbf {d} etection（hat eTection（hat4rd）在社交媒体上。具体而言，HAT4RD基于梯度上升，通过将对抗性扰动添加到后级别和事件级别模块的嵌入层以欺骗检测器。同时，检测器使用随机梯度下降来最大程度地减少对抗性风险，以学习更健壮的模型。通过这种方式，增强了后级和事件级的样本空间，我们已经在各种对抗性攻击下验证了模型的鲁棒性。此外，视觉实验表明，所提出的模型会漂移到具有扁平损失景观的区域，从而更好地概括。我们对来自两个常用的社交平台（Twitter和Weibo）的三个公共谣言数据集评估了我们的方法。实验结果表明，我们的模型比最先进的方法获得了更好的结果。

假新闻，虚假或误导性信息作为新闻，对社会的许多方面产生了重大影响，例如在政治或医疗域名。由于假新闻的欺骗性，仅将自然语言处理（NLP）技术应用于新闻内容不足。多级社会上下文信息（新闻出版商和社交媒体的参与者）和用户参与的时间信息是假新闻检测中的重要信息。然而，正确使用此信息，介绍了三个慢性困难：1）多级社会上下文信息很难在没有信息丢失的情况下使用，2）难以使用时间信息以及多级社会上下文信息，3 ）具有多级社会背景和时间信息的新闻表示难以以端到端的方式学习。为了克服所有三个困难，我们提出了一种新颖的假新闻检测框架，杂扫描。我们使用元路径在不损失的情况下提取有意义的多级社会上下文信息。 COMA-PATO，建议连接两个节点类型的复合关系，以捕获异构图中的语义。然后，我们提出了元路径实例编码和聚合方法，以捕获用户参与的时间信息，并生成新闻代表端到端。根据我们的实验，杂扫不断的性能改善了最先进的假新闻检测方法。

The spread of rumors along with breaking events seriously hinders the truth in the era of social media. Previous studies reveal that due to the lack of annotated resources, rumors presented in minority languages are hard to be detected. Furthermore, the unforeseen breaking events not involved in yesterday's news exacerbate the scarcity of data resources. In this work, we propose a novel zero-shot framework based on prompt learning to detect rumors falling in different domains or presented in different languages. More specifically, we firstly represent rumor circulated on social media as diverse propagation threads, then design a hierarchical prompt encoding mechanism to learn language-agnostic contextual representations for both prompts and rumor data. To further enhance domain adaptation, we model the domain-invariant structural features from the propagation threads, to incorporate structural position representations of influential community response. In addition, a new virtual response augmentation method is used to improve model training. Extensive experiments conducted on three real-world datasets demonstrate that our proposed model achieves much better performance than state-of-the-art methods and exhibits a superior capacity for detecting rumors at early stages.

最近，基于图形神经网络（GNN）的文本分类模型引起了越来越多的关注。大多数这些模型采用类似的网络范例，即使用预训练节点嵌入初始化和两层图卷积。在这项工作中，我们提出了Textrgnn，一种改进的GNN结构，它引入了剩余连接以加深卷积网络深度。我们的结构可以获得更广泛的节点接收领域，有效地抑制节点特征的过平滑。此外，我们将概率语言模型集成到图形节点嵌入的初始化中，从而可以更好地提取非图形语义信息。实验结果表明，我们的模型是一般和高效的。无论是语料库级别还是文本级别，它都可以显着提高分类准确性，并在各种文本分类数据集中实现SOTA性能。

异质图卷积网络在解决异质网络数据的各种网络分析任务方面已广受欢迎，从链接预测到节点分类。但是，大多数现有作品都忽略了多型节点之间的多重网络的关系异质性，而在元路径中，元素嵌入中关系的重要性不同，这几乎无法捕获不同关系跨不同关系的异质结构信号。为了应对这一挑战，这项工作提出了用于异质网络嵌入的多重异质图卷积网络（MHGCN）。我们的MHGCN可以通过多层卷积聚合自动学习多重异质网络中不同长度的有用的异质元路径相互作用。此外，我们有效地将多相关结构信号和属性语义集成到学习的节点嵌入中，并具有无监督和精选的学习范式。在具有各种网络分析任务的五个现实世界数据集上进行的广泛实验表明，根据所有评估指标，MHGCN与最先进的嵌入基线的优势。

多变量时间序列预测是一个具有挑战性的任务，因为数据涉及长期和短期模式的混合，具有变量之间的动态时空依赖性。现有图形神经网络（GNN）通常与预定义的空间图或学习的固定邻接图模拟多变量关系。它限制了GNN的应用，并且无法处理上述挑战。在本文中，我们提出了一种新颖的框架，即静态和动态图形学习 - 神经网络（SDGL）。该模型分别从数据获取静态和动态图形矩阵分别为模型长期和短期模式。开发静态Matric以通过节点嵌入捕获固定的长期关联模式，并利用图规律性来控制学习静态图的质量。为了捕获变量之间的动态依赖性，我们提出了基于改变节点特征和静态节点Embeddings生成时变矩阵的动态图。在该方法中，我们将学习的静态图信息作为感应偏置集成为诱导动态图和局部时空模式更好。广泛的实验是在两个交通数据集中进行，具有额外的结构信息和四个时间序列数据集，这表明我们的方法在几乎所有数据集上实现了最先进的性能。如果纸张被接受，我将在GitHub上打开源代码。