作为一个与现实世界互动的虚拟世界，元媒体封装了我们对下一代互联网的期望，同时带来了新的关键绩效指标（KPIS）。常规的超级可靠和低延迟通信（URLLC）可以满足绝大多数客观服务KPI，但是很难为用户提供个性化的荟萃服务体验。由于提高经验质量（QOE）可以被视为当务之急的KPI，因此URLLC朝向下一代URLLC（XURLLC），以支持基于图形技术的荟萃分析。通过将更多资源分配给用户更感兴趣的虚拟对象，可以实现更高的QoE。在本文中，我们研究了元服务提供商（MSP）和网络基础架构提供商（INP）之间的相互作用，以部署Metaverse Xurllc服务。提供了最佳合同设计框架。具体而言，将最大化的MSP的实用程序定义为元用户的QOE的函数，同时确保INP的激励措施。为了建模Metaverse Xurllc服务的Qoe，我们提出了一个名为Meta Immersion的新颖指标，该指标既包含了客观网络KPI和元用户的主观感觉。使用用户对象注意级别（UOAL）数据集，我们开发并验证了注意力吸引人的渲染能力分配方案以改善QOE。结果表明，与常规的URLLC相比，Xurllc平均提高了20.1％的QoE改善。当总资源有限时，QoE改进的比例较高，例如40％。

联合学习（FL）是一个有前途的分布式框架，用于协作人工智能模型培训，同时保护用户隐私。引起大量研究关注的引导组件是激励机制刺激佛罗里达用户协作的设计。大多数作品采用以经纪人为中心的方法来帮助中央运营商吸引参与者并进一步获得训练有素的模型。很少有作品认为参与者之间以参与者为中心的合作来追求其共同利益的FL模型，这会引起以经纪人FL的激励机制设计的显着差异。为了协调自私和异质参与者，我们提出了一个新颖的分析框架，以激励以参与者为中心的FL有效，有效的合作。具体而言，我们分别提出了两个新型游戏模型，用于贡献符合贡献的FL（COFL）和贡献感知的FL（CAFL），后者在其中实现了最低贡献阈值机制。我们进一步分析了COFL和CAFL游戏的NASH平衡的独特性和存在，并设计有效的算法以实现平衡溶液。广泛的绩效评估表明，COFL中存在自由骑行现象，通过采用CAFL模型具有优化的最低阈值，可以极大地缓解这种现象。

许多现实世界中普遍存在的应用程序，例如停车建议和空气污染监测，都能从准确的长期时空预测（LSTF）中受益匪浅。 LSTF利用了空间和时间域，上下文信息和数据中固有模式之间的长期依赖性。最近的研究揭示了多画望神经网络（MGNN）提高预测性能的潜力。但是，由于几个问题，现有的MGNN方法不能直接应用于LSTF：一般性低，不充分使用上下文信息以及不平衡的图形融合方法。为了解决这些问题，我们构建了新的图形模型，以表示每个节点的上下文信息和长期时空数据依赖性结构。为了融合跨多个图形的信息，我们提出了一个新的动态多绘图融合模块，以通过空间注意力和图形注意机制来表征图中节点和跨图的节点的相关性。此外，我们引入了可训练的重量张量，以指示不同图中每个节点的重要性。在两个大规模数据集上进行的广泛实验表明，我们提出的方法显着改善了LSTF预测任务中现有图形神经网络模型的性能。

现有的离线增强学习（RL）方法面临一些主要挑战，尤其是学识渊博的政策与行为政策之间的分配转变。离线Meta-RL正在成为应对这些挑战的一种有前途的方法，旨在从一系列任务中学习信息丰富的元基础。然而，如我们的实证研究所示，离线元RL在具有良好数据集质量的任务上的单个任务RL方法可能胜过，这表明必须在“探索”不合时宜的情况下进行精细的平衡。通过遵循元元素和“利用”离线数据集的分配状态行为，保持靠近行为策略。通过这种经验分析的激励，我们探索了基于模型的离线元RL，并具有正则政策优化（MERPO），该策略优化（MERPO）学习了一种用于有效任务结构推理的元模型，并提供了提供信息的元元素，以安全地探索过分分布状态 - 行为。特别是，我们使用保守的政策评估和正规政策改进，设计了一种新的基于元指数的基于元指数的基于元模型的参与者批判性（RAC），作为MERPO的关键构建块作为Merpo的关键构建块；而其中的内在权衡是通过在两个正规机构之间达到正确的平衡来实现的，一个是基于行为政策，另一个基于元政策。从理论上讲，我们学识渊博的政策可以保证对行为政策和元政策都有保证的改进，从而确保通过离线元RL对新任务的绩效提高。实验证实了Merpo优于现有的离线META-RL方法的出色性能。

我们考虑通过连接到中央服务器的一组边缘设备的大规模分布式优化，其中服务器和边缘设备之间的有限通信带宽对优化过程提出了显着的瓶颈。灵感来自最近在联邦学习的进步，我们提出了一种分布式随机梯度下降（SGD）类型算法，该算法利用梯度的稀疏性，尽可能降低沟通负担。在算法的核心，用于使用压缩的感测技术来压缩器件侧的局部随机梯度;在服务器端，从嘈杂的聚合压缩的本地梯度恢复全局随机梯度的稀疏近似。我们对通信信道产生的噪声扰动的存在，对我们算法的收敛性进行了理论分析，并且还进行了数值实验以证实其有效性。

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.

Automatic music generation with artificial intelligence typically requires a large amount of data which is hard to obtain for many less common genres and musical instruments. To tackle this issue, we present ongoing work and preliminary findings on the possibility for deep models to transfer knowledge from language to music, by finetuning large language models pre-trained on a massive text corpus on only hundreds of MIDI files of drum performances. We show that by doing so, one of the largest, state-of-the-art models (GPT3) is capable of generating reasonable drum grooves, while models that are not pre-trained (Transformer) shows no such ability beyond naive repetition. Evaluating generated music is a challenging task, more so is evaluating drum grooves with little precedence in literature. Hence, we propose a tailored structural evaluation method and analyze drum grooves produced by GPT3 compared to those played by human professionals, exposing the strengths and weaknesses of such generation by language-to-music transfer. Our findings suggest that language-to-music transfer learning with large language models is viable and promising.