本文介绍了我们对第四次情感行为分析（ABAW）竞争的多任务学习（MTL）挑战的提交。基于视觉功能表示，我们利用三种类型的时间编码器来捕获视频中的时间上下文信息，包括基于变压器的编码器，基于LSTM的编码器和基于GRU的编码器。使用时间上下文感知表示，我们采用多任务框架来预测图像的价，唤醒，表达和AU值。此外，将平滑处理用于完善初始价和唤醒预测，并使用模型集成策略来结合不同模型设置的多个结果。我们的系统在MTL挑战验证数据集上实现了$ 1.742 $的性能。

多模式变压器表现出高容量和灵活性，可将图像和文本对齐以进行视觉接地。然而，由于自我发挥操作的二次时间复杂性，仅编码的接地框架（例如，transvg）遭受了沉重的计算。为了解决这个问题，我们通过将整个接地过程解散为编码和解码阶段，提出了一种新的多模式变压器体系结构，以动态MDETR形成。关键观察是，图像中存在很高的空间冗余。因此，我们通过在加快视觉接地过程之前利用这种稀疏性来设计一种新的动态多模式变压器解码器。具体而言，我们的动态解码器由2D自适应采样模块和文本引导的解码模块组成。采样模块旨在通过预测参考点的偏移来选择这些信息补丁，而解码模块则可以通过在图像功能和文本功能之间执行交叉注意来提取接地对象信息。这两个模块也被堆叠起来，以逐渐弥合模态间隙，并迭代地完善接地对象的参考点，最终实现了视觉接地的目的。对五个基准测试的广泛实验表明，我们提出的动态MDETR实现了计算和准确性之间的竞争权衡。值得注意的是，在解码器中仅使用9％的特征点，我们可以降低〜44％的多模式变压器的GLOP，但仍然比仅编码器的对应物更高的精度。此外，为了验证其概括能力并扩展我们的动态MDETR，我们构建了第一个单级剪辑授权的视觉接地框架，并在这些基准测试中实现最先进的性能。

人工智能的最新进展在很大程度上受益于更好的神经网络体系结构。这些体系结构是昂贵的反复试验过程的产物。为了简化此过程，我们开发了Archexplorer，这是一种视觉分析方法，用于了解神经体系结构空间并汇总设计原理。我们方法背后的关键思想是通过利用体系结构之间的结构距离来解释建筑空间。我们将成对距离的计算提出解决，以解决全对最短路径问题。为了提高效率，我们将此问题分解为一组最短的路径问题。时间复杂性从O（KN^2n）降低到O（KNN）。根据它们之间的距离，构造在层次上聚集。已经开发了基于圆圈的架构可视化，以传达群集和每个集群中架构的本地社区之间的全球关系。提出了两项​​案例研究和一项分析后，以证明Argsplorer在总结设计原理和选择表现更好的架构方面的有效性。

草原修复是保护草原生态退化的关键手段。为了减轻广泛的人类劳动并提高了恢复效率，无人机的全自动能力很有希望，但仍在等待被利用。本文通过在计划草地修复时明确考虑了无人机和草地退化的现实限制来推动这项新兴技术。为此，在有限的无人机电池能量，草种子的重量，恢复区域的数量以及相应的尺寸下，在数学上以数学建模为数学建模。然后，我们分析了这些原始问题通过考虑这些限制，即最短的飞行路径和最佳区域分配出现了两个冲突目标。结果，恢复区域的最大化是轨迹设计问题和高度耦合区域分配问题的综合。从优化的角度来看，这需要解决旅行推销员问题（TSP）和多维背包问题（MKP）的两个NP硬问题。为了解决这个复杂的问题，我们提出了一种称为Chapbilm的合作优化算法，以通过利用它们之间的相互依赖性来交入解决这两个问题。多个模拟验证轨迹设计与区域分配之间的冲突。合作优化算法的有效性也得到了与传统优化方法的比较，这些方法不利用两个问题之间的相互依赖性。结果，提出的算法以近乎理想的方式成功地解决了多个仿真实例。

教学机器根据少数训练样本认识到一个新的类别，特别是由于缺乏数据缺乏的新型类别的难题了解，只有一个仍然挑战。然而，人类可以快速学习新课程，甚至在人类可以讲述基于视觉和语义先前知识的关于每个类别的歧视特征时，甚至给出了一些样本。为了更好地利用这些先验知识，我们提出了语义引导的注意力（SEGA）机制，其中语义知识用于以自上而下的方式引导视觉感知，在区分类别时应注意哪些视觉特征。结果，即使少量样品也可以更具判别嵌入新类。具体地，借助从基类传输可视化的先验知识，接受了一个特征提取器，以培训以将每个小组类的数量的每个小组的图像嵌入到视觉原型中。然后，我们学习一个网络将语义知识映射到特定于类别的注意力矢量，该向量将用于执行功能选择以增强视觉原型。在Miniimagenet，Tieredimagenet，CiFar-FS和Cub上进行了广泛的实验表明，我们的语义引导的注意力实现了预期的功能和优于最先进的结果。

视频接地旨在通过给定语言查询，本地化未经监控的视频中的相应视频时刻。现有方法通常以间接方式解决此任务，通过将其作为提案和匹配或融合和检测问题。解决这些替代问题通常需要在培训和手工制作的近重复结果中进行复杂的标签分配。同时，现有的作品通常专注于具有单句的稀疏视频接地，作为输入可能导致由于其不清晰的描述而产生模糊的本地化。在本文中，我们通过将段落作为输入同时定位多个时刻来解决密集视频接地的新问题。从视频接地的视角是语言条件回归，我们通过重新拟合变压器 - 相似的架构（PRVG）来提出端到端的并行解码范式。我们的PRVG中的关键设计是使用语言作为查询，并基于语言调制的可视表示直接回归矩界限。由于其简单设计，我们的PRVG框架可以应用于不同的测试方案（稀疏或密集的接地），并允许无需任何后处理技术的有效推理。此外，我们设计了强大的提案级注意力损失，以指导PRVG的培训，这不变于时刻持续时间，并有助于模型收敛。我们对ActivityNet标题和炸玉米饼的两个视频接地基准进行实验，展示了我们的PRVG可以显着优于以前的方法。我们还进行深入的研究，以研究并行回归范例对视频接地的有效性。

Masked image modeling (MIM) performs strongly in pre-training large vision Transformers (ViTs). However, small models that are critical for real-world applications cannot or only marginally benefit from this pre-training approach. In this paper, we explore distillation techniques to transfer the success of large MIM-based pre-trained models to smaller ones. We systematically study different options in the distillation framework, including distilling targets, losses, input, network regularization, sequential distillation, etc, revealing that: 1) Distilling token relations is more effective than CLS token- and feature-based distillation; 2) An intermediate layer of the teacher network as target perform better than that using the last layer when the depth of the student mismatches that of the teacher; 3) Weak regularization is preferred; etc. With these findings, we achieve significant fine-tuning accuracy improvements over the scratch MIM pre-training on ImageNet-1K classification, using all the ViT-Tiny, ViT-Small, and ViT-base models, with +4.2%/+2.4%/+1.4% gains, respectively. Our TinyMIM model of base size achieves 52.2 mIoU in AE20K semantic segmentation, which is +4.1 higher than the MAE baseline. Our TinyMIM model of tiny size achieves 79.6% top-1 accuracy on ImageNet-1K image classification, which sets a new record for small vision models of the same size and computation budget. This strong performance suggests an alternative way for developing small vision Transformer models, that is, by exploring better training methods rather than introducing inductive biases into architectures as in most previous works. Code is available at https://github.com/OliverRensu/TinyMIM.

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.

Dataset distillation has emerged as a prominent technique to improve data efficiency when training machine learning models. It encapsulates the knowledge from a large dataset into a smaller synthetic dataset. A model trained on this smaller distilled dataset can attain comparable performance to a model trained on the original training dataset. However, the existing dataset distillation techniques mainly aim at achieving the best trade-off between resource usage efficiency and model utility. The security risks stemming from them have not been explored. This study performs the first backdoor attack against the models trained on the data distilled by dataset distillation models in the image domain. Concretely, we inject triggers into the synthetic data during the distillation procedure rather than during the model training stage, where all previous attacks are performed. We propose two types of backdoor attacks, namely NAIVEATTACK and DOORPING. NAIVEATTACK simply adds triggers to the raw data at the initial distillation phase, while DOORPING iteratively updates the triggers during the entire distillation procedure. We conduct extensive evaluations on multiple datasets, architectures, and dataset distillation techniques. Empirical evaluation shows that NAIVEATTACK achieves decent attack success rate (ASR) scores in some cases, while DOORPING reaches higher ASR scores (close to 1.0) in all cases. Furthermore, we conduct a comprehensive ablation study to analyze the factors that may affect the attack performance. Finally, we evaluate multiple defense mechanisms against our backdoor attacks and show that our attacks can practically circumvent these defense mechanisms.

Blind image quality assessment (BIQA) remains challenging due to the diversity of distortion and image content variation, which complicate the distortion patterns crossing different scales and aggravate the difficulty of the regression problem for BIQA. However, existing BIQA methods often fail to consider multi-scale distortion patterns and image content, and little research has been done on learning strategies to make the regression model produce better performance. In this paper, we propose a simple yet effective Progressive Multi-Task Image Quality Assessment (PMT-IQA) model, which contains a multi-scale feature extraction module (MS) and a progressive multi-task learning module (PMT), to help the model learn complex distortion patterns and better optimize the regression issue to align with the law of human learning process from easy to hard. To verify the effectiveness of the proposed PMT-IQA model, we conduct experiments on four widely used public datasets, and the experimental results indicate that the performance of PMT-IQA is superior to the comparison approaches, and both MS and PMT modules improve the model's performance.