尽管已经提出了许多方法来增强对抗性扰动的可转移性,但这些方法是以启发式方式设计的,并且尚不清楚改善对抗性转移性的基本机制。本文总结了在统一视图中以十二个以前的可传递性提高方法共享的共同机制,即这些方法都减少了区域对抗性扰动之间的游戏理论相互作用。为此,我们专注于区域对抗扰动之间所有相互作用的攻击效用,我们首先发现并证明了对抗传递性与相互作用的攻击效用之间的负相关性。基于这一发现,我们从理论上证明并从经验上验证了十二种以前的可传递性提高方法均减少了区域对抗扰动之间的相互作用。更重要的是,我们将相互作用的减少视为增强对抗性转移性的基本原因。此外,我们设计了交互损失,以直接惩罚攻击过程中区域对抗扰动之间的相互作用。实验结果表明,相互作用损失显着提高了对抗扰动的转移性。
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基于常规卷积网络的视频超分辨率(VSR)方法具有很强的视频序列的时间建模能力。然而,在单向反复卷积网络中的不同反复单元接收的输入信息不平衡。早期重建帧接收较少的时间信息,导致模糊或工件效果。虽然双向反复卷积网络可以缓解这个问题,但它大大提高了重建时间和计算复杂性。它也不适用于许多应用方案,例如在线超分辨率。为了解决上述问题,我们提出了一种端到端信息预构建的经常性重建网络(IPRRN),由信息预构建网络(IPNet)和经常性重建网络(RRNET)组成。通过将足够的信息从视频的前面集成来构建初始复发单元所需的隐藏状态,以帮助恢复较早的帧,信息预构建的网络在不向后传播之前和之后的输入信息差异。此外,我们展示了一种紧凑的复发性重建网络,可显着改善恢复质量和时间效率。许多实验已经验证了我们所提出的网络的有效性,并与现有的最先进方法相比,我们的方法可以有效地实现更高的定量和定性评估性能。
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流量店调度(FSS)已被广泛研究,因为它在许多类型的领域中的应用,而人类参与者对这个问题带来了巨大挑战。人力调度捕捉注意力为各种熟练程度的分配工人对适当的阶段,这对生产效率具有重要意义。在本文中,我们提出了一种称为自编码Barnace交配优化器(SBMO)的新型算法,其解决了考虑工人熟练程度的FSS问题,定义为一个新问题,流店人力调度问题(FSMSP)。 SBMO算法的亮点是与编码方法,交叉和突变运算符的组合。此外,为了解决局部最佳问题,我们设计了邻居搜索方案。最后,进行了广泛的比较模拟,以证明所提出的SBMO的优越性。结果表明,与经典和流行的对应相比,SBMO近似比率,强大的稳定性和执行时间的有效性。
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在大脑中找到适当的动态活动的适当表示对于许多下游应用至关重要。由于其高度动态的性质,暂时平均fMRI(功能磁共振成像)只能提供狭窄的脑活动视图。以前的作品缺乏学习和解释大脑体系结构中潜在动态的能力。本文构建了一个有效的图形神经网络模型,该模型均包含了从DWI(扩散加权成像)获得的区域映射的fMRI序列和结构连接性作为输入。我们通过学习样品水平的自适应邻接矩阵并进行新型多分辨率内群平滑来发现潜在大脑动力学的良好表示。我们还将输入归因于具有集成梯度的输入,这使我们能够针对每个任务推断(1)高度涉及的大脑连接和子网络,(2)成像序列的时间键帧,这些成像序列表征了任务,以及(3)歧视单个主体的子网络。这种识别特征在异质任务和个人中表征信号状态的关键子网的能力对神经科学和其他科学领域至关重要。广泛的实验和消融研究表明,我们提出的方法在空间 - 周期性图信号建模中的优越性和效率,具有对脑动力学的深刻解释。
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In this paper, we propose a robust 3D detector, named Cross Modal Transformer (CMT), for end-to-end 3D multi-modal detection. Without explicit view transformation, CMT takes the image and point clouds tokens as inputs and directly outputs accurate 3D bounding boxes. The spatial alignment of multi-modal tokens is performed implicitly, by encoding the 3D points into multi-modal features. The core design of CMT is quite simple while its performance is impressive. CMT obtains 73.0% NDS on nuScenes benchmark. Moreover, CMT has a strong robustness even if the LiDAR is missing. Code will be released at https://github.com/junjie18/CMT.
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Knowledge graphs (KG) have served as the key component of various natural language processing applications. Commonsense knowledge graphs (CKG) are a special type of KG, where entities and relations are composed of free-form text. However, previous works in KG completion and CKG completion suffer from long-tail relations and newly-added relations which do not have many know triples for training. In light of this, few-shot KG completion (FKGC), which requires the strengths of graph representation learning and few-shot learning, has been proposed to challenge the problem of limited annotated data. In this paper, we comprehensively survey previous attempts on such tasks in the form of a series of methods and applications. Specifically, we first introduce FKGC challenges, commonly used KGs, and CKGs. Then we systematically categorize and summarize existing works in terms of the type of KGs and the methods. Finally, we present applications of FKGC models on prediction tasks in different areas and share our thoughts on future research directions of FKGC.
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Few Shot Instance Segmentation (FSIS) requires models to detect and segment novel classes with limited several support examples. In this work, we explore a simple yet unified solution for FSIS as well as its incremental variants, and introduce a new framework named Reference Twice (RefT) to fully explore the relationship between support/query features based on a Transformer-like framework. Our key insights are two folds: Firstly, with the aid of support masks, we can generate dynamic class centers more appropriately to re-weight query features. Secondly, we find that support object queries have already encoded key factors after base training. In this way, the query features can be enhanced twice from two aspects, i.e., feature-level and instance-level. In particular, we firstly design a mask-based dynamic weighting module to enhance support features and then propose to link object queries for better calibration via cross-attention. After the above steps, the novel classes can be improved significantly over our strong baseline. Additionally, our new framework can be easily extended to incremental FSIS with minor modification. When benchmarking results on the COCO dataset for FSIS, gFSIS, and iFSIS settings, our method achieves a competitive performance compared to existing approaches across different shots, e.g., we boost nAP by noticeable +8.2/+9.4 over the current state-of-the-art FSIS method for 10/30-shot. We further demonstrate the superiority of our approach on Few Shot Object Detection. Code and model will be available.
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Graph Neural Networks (GNNs) have shown satisfying performance on various graph learning tasks. To achieve better fitting capability, most GNNs are with a large number of parameters, which makes these GNNs computationally expensive. Therefore, it is difficult to deploy them onto edge devices with scarce computational resources, e.g., mobile phones and wearable smart devices. Knowledge Distillation (KD) is a common solution to compress GNNs, where a light-weighted model (i.e., the student model) is encouraged to mimic the behavior of a computationally expensive GNN (i.e., the teacher GNN model). Nevertheless, most existing GNN-based KD methods lack fairness consideration. As a consequence, the student model usually inherits and even exaggerates the bias from the teacher GNN. To handle such a problem, we take initial steps towards fair knowledge distillation for GNNs. Specifically, we first formulate a novel problem of fair knowledge distillation for GNN-based teacher-student frameworks. Then we propose a principled framework named RELIANT to mitigate the bias exhibited by the student model. Notably, the design of RELIANT is decoupled from any specific teacher and student model structures, and thus can be easily adapted to various GNN-based KD frameworks. We perform extensive experiments on multiple real-world datasets, which corroborates that RELIANT achieves less biased GNN knowledge distillation while maintaining high prediction utility.
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This paper focuses on designing efficient models with low parameters and FLOPs for dense predictions. Even though CNN-based lightweight methods have achieved stunning results after years of research, trading-off model accuracy and constrained resources still need further improvements. This work rethinks the essential unity of efficient Inverted Residual Block in MobileNetv2 and effective Transformer in ViT, inductively abstracting a general concept of Meta-Mobile Block, and we argue that the specific instantiation is very important to model performance though sharing the same framework. Motivated by this phenomenon, we deduce a simple yet efficient modern \textbf{I}nverted \textbf{R}esidual \textbf{M}obile \textbf{B}lock (iRMB) for mobile applications, which absorbs CNN-like efficiency to model short-distance dependency and Transformer-like dynamic modeling capability to learn long-distance interactions. Furthermore, we design a ResNet-like 4-phase \textbf{E}fficient \textbf{MO}del (EMO) based only on a series of iRMBs for dense applications. Massive experiments on ImageNet-1K, COCO2017, and ADE20K benchmarks demonstrate the superiority of our EMO over state-of-the-art methods, \eg, our EMO-1M/2M/5M achieve 71.5, 75.1, and 78.4 Top-1 that surpass \textbf{SoTA} CNN-/Transformer-based models, while trading-off the model accuracy and efficiency well.
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The development of social media user stance detection and bot detection methods rely heavily on large-scale and high-quality benchmarks. However, in addition to low annotation quality, existing benchmarks generally have incomplete user relationships, suppressing graph-based account detection research. To address these issues, we propose a Multi-Relational Graph-Based Twitter Account Detection Benchmark (MGTAB), the first standardized graph-based benchmark for account detection. To our knowledge, MGTAB was built based on the largest original data in the field, with over 1.55 million users and 130 million tweets. MGTAB contains 10,199 expert-annotated users and 7 types of relationships, ensuring high-quality annotation and diversified relations. In MGTAB, we extracted the 20 user property features with the greatest information gain and user tweet features as the user features. In addition, we performed a thorough evaluation of MGTAB and other public datasets. Our experiments found that graph-based approaches are generally more effective than feature-based approaches and perform better when introducing multiple relations. By analyzing experiment results, we identify effective approaches for account detection and provide potential future research directions in this field. Our benchmark and standardized evaluation procedures are freely available at: https://github.com/GraphDetec/MGTAB.
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