The deep learning community has witnessed an exponentially growing interest in self-supervised learning (SSL). However, it still remains unexplored how to build a framework for learning useful representations of raw music waveforms in a self-supervised manner. In this work, we design Music2Vec, a framework exploring different SSL algorithmic components and tricks for music audio recordings. Our model achieves comparable results to the state-of-the-art (SOTA) music SSL model Jukebox, despite being significantly smaller with less than 2% of parameters of the latter. The model will be released on Huggingface(Please refer to: https://huggingface.co/m-a-p/music2vec-v1)

COVID-19大流行对全球医疗保健系统造成了沉重的负担，并造成了巨大的社会破坏和经济损失。已经提出了许多深度学习模型来执行临床预测任务，例如使用电子健康记录（EHR）数据在重症监护病房中为Covid-19患者的死亡率预测。尽管在某些临床应用中取得了最初的成功，但目前缺乏基准测试结果来获得公平的比较，因此我们可以选择最佳模型以供临床使用。此外，传统预测任务的制定与重症监护现实世界的临床实践之间存在差异。为了填补这些空白，我们提出了两项​​临床预测任务，特定于结局的预测和重症监护病房中的COVID-19患者的早期死亡率预测。这两个任务是根据幼稚的停车时间和死亡率预测任务的改编，以适应COVID-19患者的临床实践。我们提出了公平，详细的开源数据预处管道，并评估了两项任务的17个最先进的预测模型，包括5个机器学习模型，6种基本的深度学习模型和6种专门为EHR设计的深度学习预测模型数据。我们使用来自两个现实世界Covid-19 EHR数据集的数据提供基准测试结果。这两个数据集都可以公开可用，而无需任何查询，并且可以根据要求访问一个数据集。我们为两项任务提供公平，可重复的基准测试结果。我们在在线平台上部署所有实验结果和模型。我们还允许临床医生和研究人员将其数据上传到平台上，并使用训练有素的模型快速获得预测结果。我们希望我们的努力能够进一步促进Covid-19预测建模的深度学习和机器学习研究。

Existing 3D-aware image synthesis approaches mainly focus on generating a single canonical object and show limited capacity in composing a complex scene containing a variety of objects. This work presents DisCoScene: a 3Daware generative model for high-quality and controllable scene synthesis. The key ingredient of our method is a very abstract object-level representation (i.e., 3D bounding boxes without semantic annotation) as the scene layout prior, which is simple to obtain, general to describe various scene contents, and yet informative to disentangle objects and background. Moreover, it serves as an intuitive user control for scene editing. Based on such a prior, the proposed model spatially disentangles the whole scene into object-centric generative radiance fields by learning on only 2D images with the global-local discrimination. Our model obtains the generation fidelity and editing flexibility of individual objects while being able to efficiently compose objects and the background into a complete scene. We demonstrate state-of-the-art performance on many scene datasets, including the challenging Waymo outdoor dataset. Project page: https://snap-research.github.io/discoscene/

Video generation requires synthesizing consistent and persistent frames with dynamic content over time. This work investigates modeling the temporal relations for composing video with arbitrary length, from a few frames to even infinite, using generative adversarial networks (GANs). First, towards composing adjacent frames, we show that the alias-free operation for single image generation, together with adequately pre-learned knowledge, brings a smooth frame transition without compromising the per-frame quality. Second, by incorporating the temporal shift module (TSM), originally designed for video understanding, into the discriminator, we manage to advance the generator in synthesizing more consistent dynamics. Third, we develop a novel B-Spline based motion representation to ensure temporal smoothness to achieve infinite-length video generation. It can go beyond the frame number used in training. A low-rank temporal modulation is also proposed to alleviate repeating contents for long video generation. We evaluate our approach on various datasets and show substantial improvements over video generation baselines. Code and models will be publicly available at https://genforce.github.io/StyleSV.

Generative adversarial network (GAN) is formulated as a two-player game between a generator (G) and a discriminator (D), where D is asked to differentiate whether an image comes from real data or is produced by G. Under such a formulation, D plays as the rule maker and hence tends to dominate the competition. Towards a fairer game in GANs, we propose a new paradigm for adversarial training, which makes G assign a task to D as well. Specifically, given an image, we expect D to extract representative features that can be adequately decoded by G to reconstruct the input. That way, instead of learning freely, D is urged to align with the view of G for domain classification. Experimental results on various datasets demonstrate the substantial superiority of our approach over the baselines. For instance, we improve the FID of StyleGAN2 from 4.30 to 2.55 on LSUN Bedroom and from 4.04 to 2.82 on LSUN Church. We believe that the pioneering attempt present in this work could inspire the community with better designed generator-leading tasks for GAN improvement.

Generative models, as an important family of statistical modeling, target learning the observed data distribution via generating new instances. Along with the rise of neural networks, deep generative models, such as variational autoencoders (VAEs) and generative adversarial network (GANs), have made tremendous progress in 2D image synthesis. Recently, researchers switch their attentions from the 2D space to the 3D space considering that 3D data better aligns with our physical world and hence enjoys great potential in practice. However, unlike a 2D image, which owns an efficient representation (i.e., pixel grid) by nature, representing 3D data could face far more challenges. Concretely, we would expect an ideal 3D representation to be capable enough to model shapes and appearances in details, and to be highly efficient so as to model high-resolution data with fast speed and low memory cost. However, existing 3D representations, such as point clouds, meshes, and recent neural fields, usually fail to meet the above requirements simultaneously. In this survey, we make a thorough review of the development of 3D generation, including 3D shape generation and 3D-aware image synthesis, from the perspectives of both algorithms and more importantly representations. We hope that our discussion could help the community track the evolution of this field and further spark some innovative ideas to advance this challenging task.

人类不断与日常对象互动以完成任务。为了了解这种相互作用，计算机需要从观察全身与场景的全身相互作用的相机中重建这些相互作用。由于身体和物体之间的阻塞，运动模糊，深度/比例模棱两可以及手和可抓握的物体零件的低图像分辨率，这是具有挑战性的。为了使问题可以解决，社区要么专注于互动的手，忽略身体或互动的身体，无视双手。 Grab数据集解决了灵活的全身互动，但使用基于标记的MOCAP并缺少图像，而行为则捕获了身体对象互动的视频，但缺乏手动细节。我们使用参数全身模型SMPL-X和已知的对象网格来解决一种新的方法，该方法与Intercap的先前工作局限性，该方法是一种新的方法，可重建从多视图RGB-D数据进行交互的整体和对象。为了应对上述挑战，Intercap使用了两个关键观察：（i）可以使用手和物体之间的接触来改善两者的姿势估计。 （ii）Azure Kinect传感器使我们能够建立一个简单的多视图RGB-D捕获系统，该系统在提供合理的相机间同步时最小化遮挡的效果。使用此方法，我们捕获了Intercap数据集，其中包含10个受试者（5名男性和5个女性）与10个各种尺寸和负担的物体相互作用，包括与手或脚接触。 Intercap总共有223个RGB-D视频，产生了67,357个多视图帧，每个帧包含6个RGB-D图像。我们的方法为每个视频框架提供了伪真正的身体网格和对象。我们的Intercap方法和数据集填补了文献中的重要空白，并支持许多研究方向。我们的数据和代码可用于研究目的。

通过区分真实和合成样品，鉴别器在训练生成对抗网络（GAN）中起着至关重要的作用。尽管实际数据分布保持不变，但由于发电机的发展，合成分布一直变化，从而影响鉴别器的BI分类任务的相应变化。我们认为，对其容量进行即时调整的歧视者可以更好地适应这种时间变化的任务。一项全面的实证研究证实，所提出的培训策略称为Dynamicd，改善了合成性能，而不会产生任何其他计算成本或培训目标。在不同的数据制度下开发了两个容量调整方案，用于培训gan：i）给定足够数量的培训数据，歧视者从逐渐增加的学习能力中受益，ii）ii）当培训数据受到限制时，逐渐减少层宽度的宽度减轻。歧视者的过度问题。在一系列数据集上进行的2D和3D感知图像合成任务的实验证实了我们的动力学的普遍性以及对基准的实质性改进。此外，Dynamicd与其他歧视器改进方法（包括数据增强，正规化器和预训练）具有协同作用，并且在将学习gans合并时会带来连续的性能增长。

近年来，由于其在数字人物，角色产生和动画中的广泛应用，人们对3D人脸建模的兴趣越来越大。现有方法压倒性地强调了对面部的外部形状，质地和皮肤特性建模，而忽略了内部骨骼结构和外观之间的固有相关性。在本文中，我们使用学习的参数面部发电机提出了雕塑家，具有骨骼一致性的3D面部创作，旨在通过混合参数形态表示轻松地创建解剖上正确和视觉上令人信服的面部模型。雕塑家的核心是露西（Lucy），这是与整形外科医生合作的第一个大型形状面部脸部数据集。我们的Lucy数据集以最古老的人类祖先之一的化石命名，其中包含正牙手术前后全人头的高质量计算机断层扫描（CT）扫描，这对于评估手术结果至关重要。露西（Lucy）由144次扫描，分别对72名受试者（31名男性和41名女性）组成，其中每个受试者进行了两次CT扫描，并在恐惧后手术中进行了两次CT扫描。根据我们的Lucy数据集，我们学习了一个新颖的骨骼一致的参数面部发电机雕塑家，它可以创建独特而细微的面部特征，以帮助定义角色，同时保持生理声音。我们的雕塑家通过将3D脸的描绘成形状混合形状，姿势混合形状和面部表达混合形状，共同在统一数据驱动的框架下共同建模头骨，面部几何形状和面部外观。与现有方法相比，雕塑家在面部生成任务中保留了解剖学正确性和视觉现实主义。最后，我们展示了雕塑家在以前看不见的各种花式应用中的鲁棒性和有效性。

尽管利用张量低级别先验的方法是在高维数据处理中蓬勃发展并获得了令人满意的性能，但它们在动态磁共振（MR）图像重建中的应用受到限制。在本文中，我们集中于基于快速傅立叶变换（FFT）的张量奇异值分解（T-SVD），并且仅提供了FFT域中的确定且有限的张量低级别先验密切的数据和FFT域匹配。通过将FFT推广到转换的T-SVD的任意统一转换并提出了转换的张量核标准（TTNN），我们引入了一个基于TTNN的灵活模型，能够利用张量的低量量，在变换的域中的张量低级别。更大的转换空间并精心设计了基于乘数交替方向方法（ADMM）的迭代优化算法，该算法进一步将其进一步展开为基于模型的深层展开的重建网络，以学习转换后的张量低率之前（t $^2） $ LR-NET）。卷积神经网络（CNN）被合并到T $^2 $ LR-NET中，以从动态MR Image数据集中学习最匹配的转换。展开的重建网络还通过利用CNN提取的特征域中的低级别先验来提供有关低级先验利用率的新观点。两个心脏CINE MR数据集的实验结果表明，与基于最新优化和基于网络的最先进的基于网络的方法相比，提出的框架可以提供改进的恢复结果。