最近已被证明扩散模型产生高质量的合成图像,尤其是与指导技术配对,以促进忠诚的多样性。我们探索文本条件图像综合问题的扩散模型,并比较了两种不同的指导策略:剪辑指导和自由分类指导。我们发现后者是人类评估者的优选,用于光敏和标题相似度,并且通常产生光素质拟种样品。使用自由分类指导的35亿参数文本条件扩散模型的样本由人类评估者对来自Dall-E的人的人们青睐,即使后者使用昂贵的剪辑重新划分。此外,我们发现我们的模型可以进行微调,以执行图像修复,从而实现强大的文本驱动的图像编辑。我们在过滤的数据集中培训较小的模型,并在https://github.com/openai/glide-text2im释放代码和权重。
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Figure 1: A five-fingered humanoid hand trained with reinforcement learning manipulating a block from an initial configuration to a goal configuration using vision for sensing.
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Exploration in environments with sparse rewards has been a persistent problem in reinforcement learning (RL). Many tasks are natural to specify with a sparse reward, and manually shaping a reward function can result in suboptimal performance. However, finding a non-zero reward is exponentially more difficult with increasing task horizon or action dimensionality. This puts many real-world tasks out of practical reach of RL methods. In this work, we use demonstrations to overcome the exploration problem and successfully learn to perform long-horizon, multi-step robotics tasks with continuous control such as stacking blocks with a robot arm. Our method, which builds on top of Deep Deterministic Policy Gradients and Hindsight Experience Replay, provides an order of magnitude of speedup over RL on simulated robotics tasks. It is simple to implement and makes only the additional assumption that we can collect a small set of demonstrations. Furthermore, our method is able to solve tasks not solvable by either RL or behavior cloning alone, and often ends up outperforming the demonstrator policy.
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Dealing with sparse rewards is one of the biggest challenges in Reinforcement Learning (RL). We present a novel technique called Hindsight Experience Replay which allows sample-efficient learning from rewards which are sparse and binary and therefore avoid the need for complicated reward engineering. It can be combined with an arbitrary off-policy RL algorithm and may be seen as a form of implicit curriculum. We demonstrate our approach on the task of manipulating objects with a robotic arm. In particular, we run experiments on three different tasks: pushing, sliding, and pick-and-place, in each case using only binary rewards indicating whether or not the task is completed. Our ablation studies show that Hindsight Experience Replay is a crucial ingredient which makes training possible in these challenging environments. We show that our policies trained on a physics simulation can be deployed on a physical robot and successfully complete the task. The video presenting our experiments is available at https://goo.gl/SMrQnI.
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We explore the generation of visualisations of audio latent spaces using an audio-to-image generation pipeline. We believe this can help with the interpretability of audio latent spaces. We demonstrate a variety of results on the NSynth dataset. A web demo is available.
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In this article, we use artificial intelligence algorithms to show how to enhance the resolution of the elementary particle track fitting in inhomogeneous dense detectors, such as plastic scintillators. We use deep learning to replace more traditional Bayesian filtering methods, drastically improving the reconstruction of the interacting particle kinematics. We show that a specific form of neural network, inherited from the field of natural language processing, is very close to the concept of a Bayesian filter that adopts a hyper-informative prior. Such a paradigm change can influence the design of future particle physics experiments and their data exploitation.
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深卷积神经网络(CNN)用于图像通过自动挖掘精确的结构信息进行图像。但是,大多数现有的CNN依赖于扩大设计网络的深度以获得更好的降级性能,这可能会导致训练难度。在本文中,我们通过三个阶段(即动态卷积块(DCB),两个级联的小波变换和增强块(网络)和残留块(RB)(RB)(RB)(RB),提出了带有小波变换(MWDCNN)的多阶段图像。 。 DCB使用动态卷积来动态调整几次卷积的参数,以在降级性能和计算成本之间做出权衡。 Web使用信号处理技术(即小波转换)和判别性学习的组合来抑制噪声,以恢复图像Denoising中更详细的信息。为了进一步删除冗余功能,RB用于完善获得的功能,以改善通过改进残留密度架构来重建清洁图像的特征。实验结果表明,在定量和定性分析方面,提出的MWDCNN优于一些流行的非授权方法。代码可在https://github.com/hellloxiaotian/mwdcnn上找到。
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常规的多视图聚类试图基于所有观点的假设,以完全观察到所有观点的假设。但是,在诸如疾病诊断,多媒体分析和建议系统之类的实际应用中,常见的是,在许多情况下,并非所有样品的观点都可以使用,这导致常规多视图聚类方法的失败。在此不完整的多视图数据上的聚类称为不完整的多视图聚类。鉴于有前途的应用前景,近年来对不完整的多视图聚类的研究取得了明显的进步。但是,没有调查可以总结当前的进展并指出未来的研究方向。为此,我们回顾了最新的关于多视图聚类的研究。重要的是,我们提供一些框架来统一相应的不完整的多视图聚类方法,并从理论和实验角度对某些代表性方法进行深入的比较分析。最后,为研究人员提供了不完整的多视图聚类领域中的一些开放问题。
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利用深度学习的水提取需要精确的像素级标签。然而,在像素级别标记高分辨率遥感图像非常困难。因此,我们研究如何利用点标签来提取水体并提出一种名为邻居特征聚合网络(NFANET)的新方法。与PixelLevel标签相比,Point标签更容易获得,但它们会失去许多信息。在本文中,我们利用了局部水体的相邻像素之间的相似性,并提出了邻居采样器来重塑遥感图像。然后,将采样的图像发送到网络以进行特征聚合。此外,我们使用改进的递归训练算法进一步提高提取精度,使水边界更加自然。此外,我们的方法利用相邻特征而不是全局或本地特征来学习更多代表性。实验结果表明,所提出的NFANET方法不仅优于其他研究的弱监管方法,而且还获得与最先进的结果相似。
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用于音乐的人工智能(AI)的巨大进展,特别是对于音乐作品和访问大型数据库来通过互联网进行商业化。我们有兴趣进一步推进这一领域,专注于构成。与目前的黑盒AI方法相比,我们正在为生成音乐系统支持可解释的组成前景。特别是,我们正在从分布组成分类(Discocat)建模框架中导入方法,用于自然语言处理(NLP),由音乐语法激励。量子计算是一种新生的技术,它很可能及时影响音乐行业。因此,我们正在开创Quantum自然语言处理(QNLP)方法来开发新一代智能音乐系统。这项工作从Quantum Hardware上的孤立语言模型的先前实验实施中。在Quanthoven,曾经构建的第一概念证明,(a)表明可以编程量子计算机来学习对传送不同含义和(b)的音乐来说明这种能力如何可能会利用开发一个系统来组成有意义的音乐。在讨论当前对音乐的理解作为通信介质及其与自然语言的关系之后,本章侧重于开发的技术(a)编码音乐组合物作为量子电路,(b)设计量子分类器。章节以与系统创建的组合物的演示结束。
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