In the field of multimodal sentiment analysis (MSA), a few studies have leveraged the inherent modality correlation information stored in samples for self-supervised learning. However, they feed the training pairs in a random order without consideration of difficulty. Without human annotation, the generated training pairs of self-supervised learning often contain noise. If noisy or hard pairs are used for training at the easy stage, the model might be stuck in bad local optimum. In this paper, we inject curriculum learning into weakly supervised modality correlation learning. The weakly supervised correlation learning leverages the label information to generate scores for negative pairs to learn a more discriminative embedding space, where negative pairs are defined as two unimodal embeddings from different samples. To assist the correlation learning, we feed the training pairs to the model according to difficulty by the proposed curriculum learning, which consists of elaborately designed scoring and feeding functions. The scoring function computes the difficulty of pairs using pre-trained and current correlation predictors, where the pairs with large losses are defined as hard pairs. Notably, the hardest pairs are discarded in our algorithm, which are assumed as noisy pairs. Moreover, the feeding function takes the difference of correlation losses as feedback to determine the feeding actions (`stay', `step back', or `step forward'). The proposed method reaches state-of-the-art performance on MSA.

语义细分是一种关键技术，涉及高分辨率遥感（HRS）图像的自动解释，并引起了遥感社区的广泛关注。由于其层次表示能力，深度卷积神经网络（DCNN）已成功应用于HRS图像语义分割任务。但是，对大量培训数据的严重依赖性以及对数据分布变化的敏感性严重限制了DCNNS在HRS图像的语义分割中的潜在应用。这项研究提出了一种新型的无监督域适应性语义分割网络（MemoryAdaptnet），用于HRS图像的语义分割。 MemoryAdaptnet构建了一种输出空间对抗学习方案，以弥合源域和目标域之间的域分布差异，并缩小域移位的影响。具体而言，我们嵌入了一个不变的特征内存模块来存储不变的域级上下文信息，因为从对抗学习获得的功能仅代表当前有限输入的变体特征。该模块由类别注意力驱动的不变域级上下文集合模块集成到当前伪不变功能，以进一步增强像素表示。基于熵的伪标签滤波策略用于更新当前目标图像的高额伪不变功能的内存模块。在三个跨域任务下进行的广泛实验表明，我们提出的记忆ADAPTNET非常优于最新方法。

Transformer, originally devised for natural language processing, has also attested significant success in computer vision. Thanks to its super expressive power, researchers are investigating ways to deploy transformers to reinforcement learning (RL) and the transformer-based models have manifested their potential in representative RL benchmarks. In this paper, we collect and dissect recent advances on transforming RL by transformer (transformer-based RL or TRL), in order to explore its development trajectory and future trend. We group existing developments in two categories: architecture enhancement and trajectory optimization, and examine the main applications of TRL in robotic manipulation, text-based games, navigation and autonomous driving. For architecture enhancement, these methods consider how to apply the powerful transformer structure to RL problems under the traditional RL framework, which model agents and environments much more precisely than deep RL methods, but they are still limited by the inherent defects of traditional RL algorithms, such as bootstrapping and "deadly triad". For trajectory optimization, these methods treat RL problems as sequence modeling and train a joint state-action model over entire trajectories under the behavior cloning framework, which are able to extract policies from static datasets and fully use the long-sequence modeling capability of the transformer. Given these advancements, extensions and challenges in TRL are reviewed and proposals about future direction are discussed. We hope that this survey can provide a detailed introduction to TRL and motivate future research in this rapidly developing field.

Weakly-supervised temporal action localization (WTAL) learns to detect and classify action instances with only category labels. Most methods widely adopt the off-the-shelf Classification-Based Pre-training (CBP) to generate video features for action localization. However, the different optimization objectives between classification and localization, make temporally localized results suffer from the serious incomplete issue. To tackle this issue without additional annotations, this paper considers to distill free action knowledge from Vision-Language Pre-training (VLP), since we surprisingly observe that the localization results of vanilla VLP have an over-complete issue, which is just complementary to the CBP results. To fuse such complementarity, we propose a novel distillation-collaboration framework with two branches acting as CBP and VLP respectively. The framework is optimized through a dual-branch alternate training strategy. Specifically, during the B step, we distill the confident background pseudo-labels from the CBP branch; while during the F step, the confident foreground pseudo-labels are distilled from the VLP branch. And as a result, the dual-branch complementarity is effectively fused to promote a strong alliance. Extensive experiments and ablation studies on THUMOS14 and ActivityNet1.2 reveal that our method significantly outperforms state-of-the-art methods.

The statistical heterogeneity of the non-independent and identically distributed (non-IID) data in local clients significantly limits the performance of federated learning. Previous attempts like FedProx, SCAFFOLD, MOON, FedNova and FedDyn resort to an optimization perspective, which requires an auxiliary term or re-weights local updates to calibrate the learning bias or the objective inconsistency. However, in addition to previous explorations for improvement in federated averaging, our analysis shows that another critical bottleneck is the poorer optima of client models in more heterogeneous conditions. We thus introduce a data-driven approach called FedSkip to improve the client optima by periodically skipping federated averaging and scattering local models to the cross devices. We provide theoretical analysis of the possible benefit from FedSkip and conduct extensive experiments on a range of datasets to demonstrate that FedSkip achieves much higher accuracy, better aggregation efficiency and competing communication efficiency. Source code is available at: https://github.com/MediaBrain-SJTU/FedSkip.

本文的目的是通过互动地完善对人类绩效的挑战结构的自动细分，这要么是由于可用注释的稀缺性或问题本身的难度性质，例如，在癌症或小型器官方面的难度。具体而言，我们为交互式细分（TIS）提出了一种基于变压器的新型体系结构，该体系结构将精炼任务视为将与最终用户提供的点击相似的像素分组的过程。我们提出的架构由变压器解码器变体组成，该变体自然可以实现与注意机制的特征比较。与现有方法相反，我们提出的TIS不仅限于二进制细分，因此允许用户为任意数量的类别编辑掩码。为了验证提出的方法，我们对三个具有挑战性的数据集进行了广泛的实验，并证明了比现有最新方法的卓越性能。项目页面为：https：//wtliu7.github.io/tis/。

随着处理点云数据中深度学习的繁荣，最近的作品表明，后门攻击对3D视觉应用构成了严重的安全威胁。攻击者通过用触发器中毒一些训练样本将后门注射到3D模型中，从而使后门模型在干净的样品上表现良好，但在出现扳机模式时会恶意行为。现有的攻击通常将一些附加点插入点云中，或使用线性转换（例如旋转）来构建中毒点云。但是，这些中毒样品的影响可能会被某些常用的3D点云的常用预处理技术削弱，甚至可以消除，例如，离群的去除或旋转增强。在本文中，我们提出了一种新颖的觉得不可察觉，强大的后门攻击（IRBA）来应对这一挑战。我们利用一种称为加权局部变换（WLT）的非线性和局部变换来构建具有独特转换的中毒样品。由于WLT中有几种超参数和随机性，因此很难产生两个类似的转换。因此，具有独特转化的中毒样品可能对上述预处理技术有抵抗力。此外，由于由固定的WLT引起的失真的可控性和平滑度，因此生成的中毒样品也无法察觉到人类检查。在三个基准数据集和四个模型上进行的广泛实验表明，即使使用预处理技术，IRBA在大多数情况下都可以达到80％+ ASR，这显着高于以前的最新攻击。

视觉关系检测旨在检测图像中对象之间的相互作用。但是，由于对象和相互作用的多样性，此任务遭受了组合爆炸的影响。由于与同一对象相关的相互作用是依赖的，因此我们探讨了相互作用的依赖性以减少搜索空间。我们通过交互图明确地对象和交互对象进行建模，然后提出一种消息式风格的算法来传播上下文信息。因此，我们称为建议的方法神经信息传递（NMP）。我们进一步整合了语言先验和空间线索，以排除不切实际的互动并捕获空间互动。两个基准数据集的实验结果证明了我们提出的方法的优越性。我们的代码可在https://github.com/phyllish/nmp上找到。

基于图形卷积网络的方法对车身连接关系进行建模，最近在基于3D骨架的人体运动预测中显示出巨大的希望。但是，这些方法有两个关键问题：首先，仅在有限的图形频谱中过滤特征，在整个频段中丢失了足够的信息；其次，使用单个图对整个身体进行建模，低估了各个身体部门的各种模式。为了解决第一个问题，我们提出了自适应图散射，该散射利用了多个可训练的带通滤波器将姿势特征分解为较丰富的图形频谱频段。为了解决第二个问题，分别对身体零件进行建模以学习多种动力学，从而沿空间维度提取更精细的特征提取。整合了上述两种设计，我们提出了一个新型的骨架派对图散射网络（SPGSN）。该模型的核心是级联的多部分图形散射块（MPGSB），在不同的身体部门建立自适应图散射，并基于推断的频谱重要性和身体零件相互作用融合分解的特征。广泛的实验表明，SPGSN的表现优于最先进的方法，其优于13.8％，9.3％和2.7％的SPGSN在每个联合位置误差（MPJPE）上，在36m，CMU MOCAP和3DPW Dataset，3D平均位置误差（MPJPE）方面，SPGSN优于最先进的方法。分别。

本文认为很少发生异常检测（FSAD），这是一种实用但研究不足的异常检测设置（AD），在训练中，每个类别仅提供有限数量的正常图像。到目前为止，现有的FSAD研究遵循用于标准AD的单层学习范式，并且尚未探索类别间的共同点。受到人类如何检测异常的启发，即将所讨论的图像与正常图像进行比较，我们在这里利用注册，这是一个固有跨越类别（​​作为代理任务）固有概括的图像对齐任务，以训练类别不稳定的异常异常检测模型。在测试过程中，通过比较测试图像的注册特征及其相应支持（正常）图像来识别异常。据我们所知，这是训练单个可推广模型的第一种FSAD方法，不需要对新类别进行重新训练或参数调整。实验结果表明，在MVTEC和MPDD基准上，所提出的方法在AUC中优于最先进的FSAD方法。