最近，在推荐系统领域中，一个关键问题隐约可见 - 没有进行严格评估的有效基准 - 因此，这会导致不可再生的评估和不公平的比较。因此，我们从实践理论和实验的角度进行研究，目的是为严格的评估做出基准建议。关于理论研究，一系列影响整个评估链中建议性能的超级因素通过对2017 - 2020年在八个顶级会议上发表的141篇论文进行的详尽评价进行了系统的总结和分析。然后，我们将它们分类为独立于模型和模型依赖性的超因子，并相应地定义和讨论了不同的严格评估模式。在实验研究中，我们通过将这些超级因子整合以进行严格的评估来发布DaisyREC 2.0文库，从而进行了整体经验研究，以揭示不同超级效应器对建议性能的影响。在理论和实验研究的支持下，我们最终通过提出标准化程序并在六个数据集上的六个评估指标中提供10个最先进的方法来创建严格评估的基准，以作为以后研究的参考。总体而言，我们的工作阐明了建议评估中的问题，为严格的评估提供了潜在的解决方案，并为进一步调查提供了基础。

数据不足问题（即数据缺失和标签稀缺问题）是由服务和基础架构不足或城市不平衡的发展水平引起的，在实际情况下严重影响了城市计算任务。先前的转移学习方法激发了对数据不足的优雅解决方案，但仅关注一种不足问题，并且未能考虑双方。此外，大多数以前的跨城市转移方法忽略了城市间数据隐私，这在实际应用中是公众关注的。为了解决上述具有挑战性的问题，我们提出了一个新颖的跨城市联合转移学习框架（CCFTL），以应对数据不足和隐私问题。具体而言，CCFTL将关系知识从多个Rich-Data源城市转移到目标城市。此外，针对目标任务的模型参数首先在源数据上进行训练，然后通过参数传输对目标城市进行微调。通过适应联合培训和同型加密设置，CCFTL可以有效地解决城市之间的数据隐私问题。我们将城市地区的分析作为智能城市的应用，并通过一项现实世界的研究评估拟议的方法。这些实验证明了我们框架比几种竞争性最新模型的显着优势。

无监督的视频域适应是一项实用但具有挑战性的任务。在这项工作中，我们第一次从脱离视图中解决了它。我们的关键想法是在适应过程中将与域相关的信息从数据中删除。具体而言，我们考虑从两组潜在因素中生成跨域视频，一个编码静态域相关信息，另一个编码时间和语义相关的信息。然后开发转移顺序的VAE（Transvae）框架以建模这种产生。为了更好地适应适应，我们进一步提出了几个目标，以限制Transvae中的潜在因素。与几种最先进的方法相比，对UCF-HMDB，小丑和Epic-Kitchens数据集进行了广泛的实验验证了Transvae的有效性和优势。代码可在https://github.com/ldkong1205/transvae上公开获取。

场景细分和分类（SSC）是迈向视频结构分析领域的关键步骤。直观地，共同学习这两个任务可以通过共享共同信息相互促进。但是，场景细分更多地涉及相邻镜头之间的局部差异，而分类需要场景段的全局表示，这可能导致该模型在训练阶段中由两个任务之一主导。在本文中，从替代角度来克服上述挑战，我们将这两个任务通过一种预测镜头链接的新形式团结到一个任务中：链接连接两个相邻的镜头，表明它们属于同一场景或类别。最后，我们提出了一个一般的单阶段多模式顺序链接框架（OS-MSL），以通过将两个学习任务改革为统一的任务来区分和利用两倍的语义。此外，我们量身定制一个称为diffcorrnet的特定模块，以明确提取镜头之间的差异和相关性信息。对从现实世界应用收集的全新大规模数据集和电影塞恩进行了广泛的实验。两种结果都证明了我们提出的方法对强基础的有效性。

最近，视觉变压器（VIT），具有自我关注（SA）作为事实上的成分，在计算机视觉社区中表现出很大的潜力。为了在效率和性能之间进行权衡，一组作品仅仅在本地补丁中执行SA操作，而全局上下文信息被放弃，这对于可视识别任务是不可或缺的。为了解决这个问题，随后的全球本地VITS在模型中以并行或替代方式将本地SA与全球范围内纳入本地SA。然而，令人遗憾地组合的局部和全局上下文可能存在各种视觉数据的冗余，并且每个层内的接收场是固定的。或者，更优雅的方式是全局和本地上下文可以自适应地贡献本身以适应不同的视觉数据。为实现这一目标，我们本文提出了一种新的Vit架构，称为NOMMER，可以动态提名视觉变压器中的协同全球本地背景。通过调查我们提出的NOMMER的工作模式，我们进一步探讨了哪些上下文信息。有益于这种“动态提名”机制，没有钟声和吹口哨，不仅可以在Imagenet上达到84.5％的前1个分类准确性，只有73米的参数，也显示了对致密预测任务的有希望的性能，即对象检测和语义分割。代码和模型将在〜\ url {https://github.com/nommer1125/nommer中公开可用。

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.