One of the key challenges in deploying RL to real-world applications is to adapt to variations of unknown environment contexts, such as changing terrains in robotic tasks and fluctuated bandwidth in congestion control. Existing works on adaptation to unknown environment contexts either assume the contexts are the same for the whole episode or assume the context variables are Markovian. However, in many real-world applications, the environment context usually stays stable for a stochastic period and then changes in an abrupt and unpredictable manner within an episode, resulting in a segment structure, which existing works fail to address. To leverage the segment structure of piecewise stable context in real-world applications, in this paper, we propose a \textit{\textbf{Se}gmented \textbf{C}ontext \textbf{B}elief \textbf{A}ugmented \textbf{D}eep~(SeCBAD)} RL method. Our method can jointly infer the belief distribution over latent context with the posterior over segment length and perform more accurate belief context inference with observed data within the current context segment. The inferred belief context can be leveraged to augment the state, leading to a policy that can adapt to abrupt variations in context. We demonstrate empirically that SeCBAD can infer context segment length accurately and outperform existing methods on a toy grid world environment and Mujuco tasks with piecewise-stable context.

How to effectively explore the colors of reference exemplars and propagate them to colorize each frame is vital for exemplar-based video colorization. In this paper, we present an effective BiSTNet to explore colors of reference exemplars and utilize them to help video colorization by a bidirectional temporal feature fusion with the guidance of semantic image prior. We first establish the semantic correspondence between each frame and the reference exemplars in deep feature space to explore color information from reference exemplars. Then, to better propagate the colors of reference exemplars into each frame and avoid the inaccurate matches colors from exemplars we develop a simple yet effective bidirectional temporal feature fusion module to better colorize each frame. We note that there usually exist color-bleeding artifacts around the boundaries of the important objects in videos. To overcome this problem, we further develop a mixed expert block to extract semantic information for modeling the object boundaries of frames so that the semantic image prior can better guide the colorization process for better performance. In addition, we develop a multi-scale recurrent block to progressively colorize frames in a coarse-to-fine manner. Extensive experimental results demonstrate that the proposed BiSTNet performs favorably against state-of-the-art methods on the benchmark datasets. Our code will be made available at \url{https://yyang181.github.io/BiSTNet/}

在本文中，我们提出了一个多模式的多关系学习框架，针对视听语音分离的任务。尽管以前的努力已经在结合音频和视觉方式方面进行了广泛的努力，但其中大多数仅采用音频和视觉功能的直接串联。为了利用这两种方式背后的实际有用信息，我们定义了两个关键相关性，即：（1）身份相关性（在音色和面部属性之间）； （2）语音相关性（音素和唇部运动之间）。这两种相关性共同包含完整的信息，这表明将目标扬声器的声音分开，尤其是在某些困难的情况下，例如相同的性别或类似内容。为了实施，采用对比度学习或对抗性训练方法来最大化这两个相关性。他们俩都表现良好，而对抗性训练则通过避免对比度学习的某些局限性显示出其优势。与先前的研究相比，我们的解决方案证明了对实验指标的明显改进而没有额外的复杂性。进一步的分析揭示了拟议的体系结构的有效性及其未来扩展的良好潜力。

点击率（CTR）预测是推荐和广告系统中的基本技术。最近的研究证明，学习一个为多个领域服务的统一模型可有效提高整体性能。但是，在有限的培训数据下，改善跨领域的概括，并且由于其计算复杂性而难以部署当前解决方案仍然是一项挑战。在本文中，我们为多域CTR预测提出了一个简单而有效的框架ADASPARSE，该预测学习了每个域的适应性稀疏结构，从而在跨计算成本较低的域中实现了更好的概括。在Adasparse中，我们引入了域感知的神经元的加权因子来测量神经元的重要性，对于每个域而言，我们的模型可以修剪冗余神经元以改善概括。我们进一步添加了灵活的稀疏性正常，以控制学习结构的稀疏性比。离线和在线实验表明，ADASPARSE的表现高于先前的多域CTR模型。

语言模型既展示了定量的改进，又展示了新的定性功能，随着规模的增加。尽管它们具有潜在的变革性影响，但这些新能力的特征却很差。为了为未来的研究提供信息，为破坏性的新模型能力做准备，并改善社会有害的效果，至关重要的是，我们必须了解目前和近乎未来的能力和语言模型的局限性。为了应对这一挑战，我们介绍了超越模仿游戏基准（Big Bench）。 Big Bench目前由204个任务组成，由132家机构的442位作者贡献。任务主题是多样的，从语言学，儿童发展，数学，常识性推理，生物学，物理学，社会偏见，软件开发等等。 Big-Bench专注于被认为超出当前语言模型的功能的任务。我们评估了OpenAI的GPT型号，Google内部密集变压器体系结构和大型基础上的开关稀疏变压器的行为，跨越了数百万到数十亿个参数。此外，一个人类专家评估者团队执行了所有任务，以提供强大的基准。研究结果包括：模型性能和校准都随规模改善，但绝对的术语（以及与评估者的性能相比）；在模型类中的性能非常相似，尽管带有稀疏性。逐渐和预测的任务通常涉及大量知识或记忆成分，而在临界规模上表现出“突破性”行为的任务通常涉及多个步骤或组成部分或脆性指标；社交偏见通常会随着含糊不清的环境而随着规模而增加，但这可以通过提示来改善。

本文介绍了WenetsPeech，一个由10000多小时的高质量标记语音组成的多域普通话语料库，2400多小时弱贴言论，大约100万小时的语音，总共22400多小时。我们收集来自YouTube和Podcast的数据，涵盖各种演讲样式，场景，域名，主题和嘈杂的条件。引入了基于光学字符识别（OCR）的方法，以在其对应的视频字幕上为YouTube数据生成音频/文本分段候选，而高质量的ASR转录系统用于为播客数据生成音频/文本对候选。然后我们提出了一种新的端到端标签错误检测方法，可以进一步验证和过滤候选者。我们还提供三个手动标记的高质量测试集，以及WenetsPeech进行评估 - 开发用于训练中的交叉验证目的，从互联网收集的匹配测试，并从真实会议中记录的测试\ _MEETING，以获得更具挑战性的不匹配测试。使用有线exeeEX培训的基线系统，用于三个流行的语音识别工具包，即Kaldi，Espnet和Wenet，以及三个测试集的识别结果也被提供为基准。据我们所知，WenetsPeech是目前最大的开放式普通话语音语料库，其中有利于生产级语音识别的研究。

统一的流和非流式的双通（U2）用于语音识别的端到端模型在流传输能力，准确性，实时因素（RTF）和延迟方面表现出很大的性能。在本文中，我们呈现U2 ++，U2的增强版本，进一步提高了准确性。 U2 ++的核心思想是在训练中同时使用标签序列的前向和向后信息来学习更丰富的信息，并在解码时结合前向和后向预测以提供更准确的识别结果。我们还提出了一种名为SPECSUB的新数据增强方法，以帮助U2 ++模型更准确和强大。我们的实验表明，与U2相比，U2 ++在训练中显示了更快的收敛，更好地鲁棒性对解码方法，以及U2上的一致5 \％-8 \％字错误率降低增益。在Aishell-1的实验中，我们通过u2 ++实现了一个4.63 \％的字符错误率（cer），其中没有流媒体设置和5.05 \％，具有320ms延迟的流设置。据我们所知，5.05 \％是Aishell-1测试集上的最佳发布的流媒体结果。

在本文中，我们提出了一个名为Wenet的开源，生产第一和生产准备的语音识别工具包，其中实现了一种新的双通方法，以统一流传输和非流媒体端到端（E2E）语音识别单一模型。 WENET的主要动机是缩放研究与E2E演示识别模型的生产之间的差距。 Wenet提供了一种有效的方法，可以在几个真实情景中运送ASR应用程序，这是其他开源E2E语音识别工具包的主要差异和优势。在我们的工具包中，实现了一种新的双通方法。我们的方法提出了一种基于动态的基于块的关注策略，变压器层，允许任意右上下文长度修改在混合CTC /注意架构中。只有更改块大小，可以轻松控制推理延迟。然后，CTC假设被注意力解码器重新筛选以获得最终结果。我们在使用WENET上的Aishell-1数据集上的实验表明，与标准的非流式变压器相比，我们的模型在非流式ASR中实现了5.03 \％相对字符的误差率（CER）。在模型量化之后，我们的模型执行合理的RTF和延迟。

In recent years, arbitrary image style transfer has attracted more and more attention. Given a pair of content and style images, a stylized one is hoped that retains the content from the former while catching style patterns from the latter. However, it is difficult to simultaneously keep well the trade-off between the content details and the style features. To stylize the image with sufficient style patterns, the content details may be damaged and sometimes the objects of images can not be distinguished clearly. For this reason, we present a new transformer-based method named STT for image style transfer and an edge loss which can enhance the content details apparently to avoid generating blurred results for excessive rendering on style features. Qualitative and quantitative experiments demonstrate that STT achieves comparable performance to state-of-the-art image style transfer methods while alleviating the content leak problem.

In recent years, the Transformer architecture has shown its superiority in the video-based person re-identification task. Inspired by video representation learning, these methods mainly focus on designing modules to extract informative spatial and temporal features. However, they are still limited in extracting local attributes and global identity information, which are critical for the person re-identification task. In this paper, we propose a novel Multi-Stage Spatial-Temporal Aggregation Transformer (MSTAT) with two novel designed proxy embedding modules to address the above issue. Specifically, MSTAT consists of three stages to encode the attribute-associated, the identity-associated, and the attribute-identity-associated information from the video clips, respectively, achieving the holistic perception of the input person. We combine the outputs of all the stages for the final identification. In practice, to save the computational cost, the Spatial-Temporal Aggregation (STA) modules are first adopted in each stage to conduct the self-attention operations along the spatial and temporal dimensions separately. We further introduce the Attribute-Aware and Identity-Aware Proxy embedding modules (AAP and IAP) to extract the informative and discriminative feature representations at different stages. All of them are realized by employing newly designed self-attention operations with specific meanings. Moreover, temporal patch shuffling is also introduced to further improve the robustness of the model. Extensive experimental results demonstrate the effectiveness of the proposed modules in extracting the informative and discriminative information from the videos, and illustrate the MSTAT can achieve state-of-the-art accuracies on various standard benchmarks.