The security of artificial intelligence (AI) is an important research area towards safe, reliable, and trustworthy AI systems. To accelerate the research on AI security, the Artificial Intelligence Security Competition (AISC) was organized by the Zhongguancun Laboratory, China Industrial Control Systems Cyber Emergency Response Team, Institute for Artificial Intelligence, Tsinghua University, and RealAI as part of the Zhongguancun International Frontier Technology Innovation Competition (https://www.zgc-aisc.com/en). The competition consists of three tracks, including Deepfake Security Competition, Autonomous Driving Security Competition, and Face Recognition Security Competition. This report will introduce the competition rules of these three tracks and the solutions of top-ranking teams in each track.
translated by 谷歌翻译
Spatiotemporal traffic data imputation is of great significance in intelligent transportation systems and data-driven decision-making processes. To make an accurate reconstruction on partially observed traffic data, we assert the importance of characterizing both global and local trends in traffic time series. In the literature, substantial prior works have demonstrated the effectiveness of utilizing low-rankness property of traffic data by matrix/tensor completion models. In this study, we first introduce a Laplacian kernel to temporal regularization for characterizing local trends in traffic time series, which can be formulated in the form of circular convolution. Then, we develop a low-rank Laplacian convolutional representation (LCR) model by putting the nuclear norm of a circulant matrix and the Laplacian temporal regularization together, which is proved to meet a unified framework that takes a fast Fourier transform solution in a relatively low time complexity. Through extensive experiments on some traffic datasets, we demonstrate the superiority of LCR for imputing traffic time series of various time series behaviors (e.g., data noises and strong/weak periodicity). The proposed LCR model is an efficient and effective solution to large-scale traffic data imputation over the existing baseline models. The adapted datasets and Python implementation are publicly available at https://github.com/xinychen/transdim.
translated by 谷歌翻译
The problem of broad practical interest in spatiotemporal data analysis, i.e., discovering interpretable dynamic patterns from spatiotemporal data, is studied in this paper. Towards this end, we develop a time-varying reduced-rank vector autoregression (VAR) model whose coefficient matrices are parameterized by low-rank tensor factorization. Benefiting from the tensor factorization structure, the proposed model can simultaneously achieve model compression and pattern discovery. In particular, the proposed model allows one to characterize nonstationarity and time-varying system behaviors underlying spatiotemporal data. To evaluate the proposed model, extensive experiments are conducted on various spatiotemporal data representing different nonlinear dynamical systems, including fluid dynamics, sea surface temperature, USA surface temperature, and NYC taxi trips. Experimental results demonstrate the effectiveness of modeling spatiotemporal data and characterizing spatial/temporal patterns with the proposed model. In the spatial context, the spatial patterns can be automatically extracted and intuitively characterized by the spatial modes. In the temporal context, the complex time-varying system behaviors can be revealed by the temporal modes in the proposed model. Thus, our model lays an insightful foundation for understanding complex spatiotemporal data in real-world dynamical systems. The adapted datasets and Python implementation are publicly available at https://github.com/xinychen/vars.
translated by 谷歌翻译
Collaborative autonomous multi-agent systems covering a specified area have many potential applications, such as UAV search and rescue, forest fire fighting, and real-time high-resolution monitoring. Traditional approaches for such coverage problems involve designing a model-based control policy based on sensor data. However, designing model-based controllers is challenging, and the state-of-the-art classical control policy still exhibits a large degree of suboptimality. In this paper, we present a reinforcement learning (RL) approach for the multi-agent coverage problem involving agents with second-order dynamics. Our approach is based on the Multi-Agent Proximal Policy Optimization Algorithm (MAPPO). To improve the stability of the learning-based policy and efficiency of exploration, we utilize an imitation loss based on the state-of-the-art classical control policy. Our trained policy significantly outperforms the state-of-the-art. Our proposed network architecture includes incorporation of self attention, which allows a single-shot domain transfer of the trained policy to a large variety of domain shapes and number of agents. We demonstrate our proposed method in a variety of simulated experiments.
translated by 谷歌翻译
了解因果关系有助于构建干预措施,以实现特定的目标并在干预下实现预测。随着学习因果关系的越来越重要,因果发现任务已经从使用传统方法推断出潜在的因果结构从观察数据到深度学习涉及的模式识别领域。大量数据的快速积累促进了具有出色可扩展性的因果搜索方法的出现。因果发现方法的现有摘要主要集中在基于约束,分数和FCM的传统方法上,缺乏针对基于深度学习的方法的完美分类和阐述,还缺乏一些考虑和探索因果关系的角度来探索因果发现方法范式。因此,我们根据变量范式将可能的因果发现任务分为三种类型,并分别给出三个任务的定义,定义和实例化每个任务的相关数据集以及同时构建的最终因果模型,然后审查不同任务的主要因果发现方法。最后,我们从不同角度提出了一些路线图,以解决因果发现领域的当前研究差距,并指出未来的研究方向。
translated by 谷歌翻译
如今,基础模型已成为人工智能中的基本基础设施之一,铺平了通往通用情报的方式。但是,现实提出了两个紧急挑战:现有的基础模型由英语社区主导;用户通常会获得有限的资源,因此不能总是使用基础模型。为了支持中文社区的发展,我们介绍了一个名为Fengshenbang的开源项目,该项目由认知计算与自然语言研究中心(CCNL)领导。我们的项目具有全面的功能,包括大型预培训模型,用户友好的API,基准,数据集等。我们将所有这些都包装在三个子项目中:风水次模型,风水框架和狂热基准。 Fengshenbang的开源路线图旨在重新评估中国预培训的大型大型模型的开源社区,促使整个中国大型模型社区的发展。我们还希望构建一个以用户为中心的开源生态系统,以允许个人访问所需的模型以匹配其计算资源。此外,我们邀请公司,大学和研究机构与我们合作建立大型开源模型的生态系统。我们希望这个项目将成为中国认知情报的基础。
translated by 谷歌翻译
表面缺陷检测是工业质量检查最重要的过程之一。基于深度学习的表面缺陷检测方法已显示出巨大的潜力。但是,表现出色的模型通常需要大量的训练数据,并且只能检测出在训练阶段出现的缺陷。当面对少量数据数据时,缺陷检测模型不可避免地会遭受灾难性遗忘和错误分类问题的困扰。为了解决这些问题,本文提出了一个新的知识蒸馏网络,称为双知识对齐网络(DKAN)。提出的DKAN方法遵循预处理的转移学习范式,并设计了用于微调的知识蒸馏框架。具体而言,提出了增量RCNN以实现不同类别的分离稳定特征表示。在此框架下,设计特征知识对齐(FKA)的损失是在类不足的特征图之间设计的,以解决灾难性的遗忘问题,而logit知识对准(LKA)损失在logit分布之间部署以解决错误分类问题。实验已经在递增的几个neu-det数据集上进行,结果表明,DKAN在各种几个场景上的其他方法都优于其他方法,对平均平均精度度量指标最高可达6.65%,这证明了该方法的有效性。
translated by 谷歌翻译
情绪原因对提取(ECPE)是一项新的任务,旨在从文档中提取潜在的情绪和相应原因。先前的方法重点是建模成对的关系并取得了令人鼓舞的结果。但是,从根本上象征文档的基本结构的条款与差异关系仍处于研究期。在本文中,我们定义了一个新的条款 - 差异关系。为了学习它,我们提出了一个名为EA-GAT的一般条款级编码模型,该模型包括E-GAT和激活排序。 E-GAT旨在从不同类型的子句中汇总信息;激活排序利用个人情感/原因预测和基于排序的映射将条款推向更有利的表示。由于EA-GAT是一个子句级编码模型,因此可以与任何以前的方法广泛集成。实验结果表明,我们的方法比当前的所有方法在中文和英语基准语料库中都具有显着优势,平均$ 2.1 \%$和$ 1.03 \%$ $。
translated by 谷歌翻译
搜索会话中的上下文信息对于捕获用户的搜索意图很重要。已经提出了各种方法来对用户行为序列进行建模,以改善会话中的文档排名。通常,(搜索上下文,文档)对的训练样本在每个训练时期随机采样。实际上,了解用户的搜索意图和判断文档的相关性的困难从一个搜索上下文到另一个搜索上下文有很大差异。混合不同困难的训练样本可能会使模型的优化过程感到困惑。在这项工作中,我们为上下文感知文档排名提出了一个课程学习框架,其中排名模型以易于恐惧的方式学习搜索上下文和候选文档之间的匹配信号。这样一来,我们旨在将模型逐渐指向全球最佳。为了利用正面和负面示例,设计了两个课程。两个真实查询日志数据集的实验表明,我们提出的框架可以显着提高几种现有方法的性能,从而证明课程学习对上下文感知文档排名的有效性。
translated by 谷歌翻译
小鼠的自动社会行为分析已成为行为神经科学中越来越流行的研究领域。最近,已使用姿势信息(即关键点或骨骼的位置)来解释小鼠的社会行为。然而,很少在现有方法中研究了小鼠关键点基础的社会互动信息的有效编码和解码。特别是,由于高度变形的身体形状和模棱两可的运动模式,建模小鼠之间复杂的社交互动是一项挑战。为了处理交互建模问题,我们在这里提出了一个跨骨骼相互作用图聚合网络(CS-IGANET),以学习自由相互作用的小鼠的丰富动力学,其中使用了跨骨骼节点级交互模块(CS-NLI)建模多级相互作用(即内部,间和跨骨骼相互作用)。此外,我们设计了一种新颖的互动感知变压器(IAT),以动态学习社交行为的图形表示,并更新节点级表示,并在我们提出的互动意识到的自我注意力下的机制的指导下。最后,为了增强我们的模型的表示能力,提出了辅助自我监督的学习任务来衡量跨骨骼节点之间的相似性。标准CRMI13-SKERTON和我们的PDMB-Skeleton数据集的实验结果表明,我们所提出的模型的表现优于其他几种最先进的方法。
translated by 谷歌翻译