近年来，多视图学习迅速发展。尽管许多先前的研究都认为每个实例都出现在所有视图中，但在现实世界应用程序中很常见，从某些视图中丢失实例，从而导致多视图数据不完整。为了解决这个问题，我们提出了一个新型潜在的异质图网络（LHGN），以实现不完整的多视图学习，该学习旨在以灵活的方式尽可能充分地使用多个不完整的视图。通过学习统一的潜在代表，隐含地实现了不同观点之间一致性和互补性之间的权衡。为了探索样本与潜在表示之间的复杂关系，首次提出了邻域约束和视图约束，以构建异质图。最后，为了避免训练和测试阶段之间的任何不一致之处，基于图形学习的分类任务应用了转导学习技术。对现实世界数据集的广泛实验结果证明了我们模型对现有最新方法的有效性。

外部知识，例如实体和实体描述，可以帮助人类理解文本。已经探索了许多作品，以在预训练的模型中包括外部知识。通常，这些方法通常会设计预训练任务，并通过更新模型权重来隐式介绍知识，或者，将其直接与原始文本一起使用。尽管有效，但是有一些局限性。一方面，它是隐式的，只关注模型权重，预先训练的实体嵌入被忽略。另一方面，实体描述可能很漫长，并且与原始文本一起输入模型可能会分散模型的注意力。本文旨在在微调阶段明确包含实体和实体描述。首先，预训练的实体嵌入与原始文本表示融合在一起，并由backbone模型逐层更新。其次，描述由骨干模型外的知识模块表示，每个知识层选择性地连接到一个骨干层以进行融合。第三，两个与知识相关的辅助任务，即实体/描述增强和实体增强/污染任务，旨在平滑进化表示的语义差距。我们对四个面向知识的任务和两个常见任务进行了实验，结果在几个数据集上实现了新的最新时间。此外，我们进行了一项消融研究，以表明我们方法中的每个模块都是必要的。该代码可在https://github.com/lshowway/ered上获得。

新闻建议是现代社会中有效的信息传播解决方案。虽然近年来已经见证了许多有前途的新闻推荐模型，但它们主要以静态方式捕获文件级上的用户新交互。然而，在现实世界的情景中，新闻可以很复杂和多样化，盲目地将所有内容挤压到嵌入式矢量中，在提取与用户的个性化偏好兼容的信息中可以不太有效。此外，新闻推荐方案中的用户偏好可以是高度动态的，并且应该设计定制的动态机制以获得更好的推荐性能。在本文中，我们提出了一种新颖的动态新闻推荐模型。为了更好地理解新闻内容，我们利用注意机制分别代表了从句子，元素和文档级别的消息。为了捕获用户的动态偏好，连续时间信息无缝地结合到关注权重的计算中。更具体地，我们设计了一个分层关注网络，其中下层学习不同句子和元素的重要性，并且上层捕获先前互动和目标新闻之间的相关性。为了全面模型动态字符，我们首先通过结合绝对和相对时间信息来增强传统的关注机制，然后我们提出了一种动态的负采样方法来优化用户的隐式反馈。我们基于三个现实世界数据集进行广泛的实验，以展示我们的模型的效果。我们的源代码和预先训练的表示在https://github.com/lshowway/d-han提供。

最近，基于模板的跟踪器已成为领先的跟踪算法，在效率和准确性方面具有希望的性能。然而，查询特征与给定模板之间的相关操作仅利用准确的目标本地化，导致状态估计误差，特别是当目标遭受严重可变形变化时。为了解决这个问题，已经提出了基于分段的跟踪器，以便使用每像素匹配来有效地提高可变形物体的跟踪性能。然而，大多数现有跟踪器仅指初始帧中的目标特征，从而缺乏处理具有挑战性因素的辨别能力，例如，类似的分心，背景杂乱，外观变化等。在此目的，我们提出了一种动态的紧凑型存储器嵌入以增强基于分段的可变形视觉跟踪方法的辨别。具体而言，我们初始化与第一帧中的目标功能嵌入的内存嵌入。在跟踪过程中，与现有内存具有高相关的当前目标特征被更新为在线嵌入的内存。为了进一步提高可变形对象的分割精度，我们采用了点对集的匹配策略来测量像素 - 方向查询特征和整个模板之间的相关性，以捕获更详细的变形信息。关于六个具有挑战性的跟踪基准的广泛评估，包括VOT2016，VOT2018，VOT2019，GOT-10K，TrackingNet和莱斯特展示了我们对近期近似追踪者的方法的优势。此外，我们的方法优于基于出色的基于分段的跟踪器，即DVIS2017基准测试。

Image-based head swapping task aims to stitch a source head to another source body flawlessly. This seldom-studied task faces two major challenges: 1) Preserving the head and body from various sources while generating a seamless transition region. 2) No paired head swapping dataset and benchmark so far. In this paper, we propose an image-based head swapping framework (HS-Diffusion) which consists of a semantic-guided latent diffusion model (SG-LDM) and a semantic layout generator. We blend the semantic layouts of source head and source body, and then inpaint the transition region by the semantic layout generator, achieving a coarse-grained head swapping. SG-LDM can further implement fine-grained head swapping with the blended layout as condition by a progressive fusion process, while preserving source head and source body with high-quality reconstruction. To this end, we design a head-cover augmentation strategy for training and a neck alignment trick for geometric realism. Importantly, we construct a new image-based head swapping benchmark and propose two tailor-designed metrics (Mask-FID and Focal-FID). Extensive experiments demonstrate the superiority of our framework. The code will be available: https://github.com/qinghew/HS-Diffusion.

Few-shot learning (FSL), which aims to classify unseen classes with few samples, is challenging due to data scarcity. Although various generative methods have been explored for FSL, the entangled generation process of these methods exacerbates the distribution shift in FSL, thus greatly limiting the quality of generated samples. To these challenges, we propose a novel Information Bottleneck (IB) based Disentangled Generation Framework for FSL, termed as DisGenIB, that can simultaneously guarantee the discrimination and diversity of generated samples. Specifically, we formulate a novel framework with information bottleneck that applies for both disentangled representation learning and sample generation. Different from existing IB-based methods that can hardly exploit priors, we demonstrate our DisGenIB can effectively utilize priors to further facilitate disentanglement. We further prove in theory that some previous generative and disentanglement methods are special cases of our DisGenIB, which demonstrates the generality of the proposed DisGenIB. Extensive experiments on challenging FSL benchmarks confirm the effectiveness and superiority of DisGenIB, together with the validity of our theoretical analyses. Our codes will be open-source upon acceptance.

Generalized Category Discovery (GCD) aims to recognize both known and novel categories from a set of unlabeled data, based on another dataset labeled with only known categories. Without considering differences between known and novel categories, current methods learn about them in a coupled manner, which can hurt model's generalization and discriminative ability. Furthermore, the coupled training approach prevents these models transferring category-specific knowledge explicitly from labeled data to unlabeled data, which can lose high-level semantic information and impair model performance. To mitigate above limitations, we present a novel model called Decoupled Prototypical Network (DPN). By formulating a bipartite matching problem for category prototypes, DPN can not only decouple known and novel categories to achieve different training targets effectively, but also align known categories in labeled and unlabeled data to transfer category-specific knowledge explicitly and capture high-level semantics. Furthermore, DPN can learn more discriminative features for both known and novel categories through our proposed Semantic-aware Prototypical Learning (SPL). Besides capturing meaningful semantic information, SPL can also alleviate the noise of hard pseudo labels through semantic-weighted soft assignment. Extensive experiments show that DPN outperforms state-of-the-art models by a large margin on all evaluation metrics across multiple benchmark datasets. Code and data are available at https://github.com/Lackel/DPN.

Choosing the values of hyper-parameters in sparse Bayesian learning (SBL) can significantly impact performance. However, the hyper-parameters are normally tuned manually, which is often a difficult task. Most recently, effective automatic hyper-parameter tuning was achieved by using an empirical auto-tuner. In this work, we address the issue of hyper-parameter auto-tuning using neural network (NN)-based learning. Inspired by the empirical auto-tuner, we design and learn a NN-based auto-tuner, and show that considerable improvement in convergence rate and recovery performance can be achieved.

Video super-resolution is one of the most popular tasks on mobile devices, being widely used for an automatic improvement of low-bitrate and low-resolution video streams. While numerous solutions have been proposed for this problem, they are usually quite computationally demanding, demonstrating low FPS rates and power efficiency on mobile devices. In this Mobile AI challenge, we address this problem and propose the participants to design an end-to-end real-time video super-resolution solution for mobile NPUs optimized for low energy consumption. The participants were provided with the REDS training dataset containing video sequences for a 4X video upscaling task. The runtime and power efficiency of all models was evaluated on the powerful MediaTek Dimensity 9000 platform with a dedicated AI processing unit capable of accelerating floating-point and quantized neural networks. All proposed solutions are fully compatible with the above NPU, demonstrating an up to 500 FPS rate and 0.2 [Watt / 30 FPS] power consumption. A detailed description of all models developed in the challenge is provided in this paper.

本文介绍了一种简单的有效学习算法，用于一般顺序决策。该算法将探索的乐观与模型估计的最大似然估计相结合，因此被命名为OMLE。我们证明，Omle了解了多项式数量的样本中一系列非常丰富的顺序决策问题的近乎最佳策略。这个丰富的类别不仅包括大多数已知的基于模型的基于模型的强化学习（RL）问题（例如表格MDP，计算的MDP，低证人等级问题，表格弱弱/可观察到的POMDP和多步可解码的POMDP），但是同样，许多新的具有挑战性的RL问题，尤其是在可观察到的部分环境中，这些问题以前尚不清楚。值得注意的是，本文解决的新问题包括（1）具有连续观察和功能近似的可观察到的POMDP，在其中我们实现了完全独立于观察空间的第一个样品复杂性； （2）条件良好的低级顺序决策问题（也称为预测状态表示（PSRS）），其中包括并概括了所有已知的可牵引的POMDP示例，这些示例在更固有的表示下； （3）在帆条件下进行一般顺序决策问题，这统一了我们在完全可观察和部分可观察的设置中对基于模型的RL的现有理解。帆条件是由本文确定的，可以将其视为贝尔曼/证人等级的自然概括，以解决部分可观察性。