持续学习的现有工作(CL)的重点是减轻灾难性遗忘,即学习新任务时过去任务的模型绩效恶化。但是,CL系统的训练效率不足,这限制了CL系统在资源有限的方案下的现实应用。在这项工作中,我们提出了一个名为“稀疏持续学习”(SPARCL)的新颖框架,这是第一个利用稀疏性以使边缘设备上具有成本效益的持续学习的研究。 SPARCL通过三个方面的协同作用来实现训练加速度和准确性保护:体重稀疏性,数据效率和梯度稀疏性。具体而言,我们建议在整个CL过程中学习一个稀疏网络,动态数据删除(DDR),以删除信息较少的培训数据和动态梯度掩盖(DGM),以稀疏梯度更新。他们每个人不仅提高了效率,而且进一步减轻了灾难性的遗忘。 SPARCL始终提高现有最新CL方法(SOTA)CL方法的训练效率最多减少了训练失败,而且令人惊讶的是,SOTA的准确性最多最多提高了1.7%。 SPARCL还优于通过将SOTA稀疏训练方法适应CL设置的效率和准确性获得的竞争基线。我们还评估了SPARCL在真实手机上的有效性,进一步表明了我们方法的实际潜力。
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Recently, model-based agents have achieved better performance than model-free ones using the same computational budget and training time in single-agent environments. However, due to the complexity of multi-agent systems, it is tough to learn the model of the environment. The significant compounding error may hinder the learning process when model-based methods are applied to multi-agent tasks. This paper proposes an implicit model-based multi-agent reinforcement learning method based on value decomposition methods. Under this method, agents can interact with the learned virtual environment and evaluate the current state value according to imagined future states in the latent space, making agents have the foresight. Our approach can be applied to any multi-agent value decomposition method. The experimental results show that our method improves the sample efficiency in different partially observable Markov decision process domains.
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重量修剪是一种有效的模型压缩技术,可以解决在移动设备上实现实时深神经网络(DNN)推断的挑战。然而,由于精度劣化,难以利用硬件加速度,以及某些类型的DNN层的限制,难以降低的应用方案具有有限的应用方案。在本文中,我们提出了一般的细粒度的结构化修剪方案和相应的编译器优化,适用于任何类型的DNN层,同时实现高精度和硬件推理性能。随着使用我们的编译器优化所支持的不同层的灵活性,我们进一步探讨了确定最佳修剪方案的新问题,了解各种修剪方案的不同加速度和精度性能。两个修剪方案映射方法,一个是基于搜索,另一个是基于规则的,建议自动推导出任何给定DNN的每层的最佳修剪规则和块大小。实验结果表明,我们的修剪方案映射方法,以及一般细粒化结构修剪方案,优于最先进的DNN优化框架,最高可达2.48 $ \ times $和1.73 $ \ times $ DNN推理加速在CiFar-10和Imagenet DataSet上没有准确性损失。
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存在预训练模型在各种文本分类任务上取得了最先进的性能。这些模型已被证明可用于学习普遍语言表示。然而,通过先进的预训练模型无法有效地区分类似文本之间的语义差异,这对难以区分类的性能产生了很大的影响。为了解决这个问题,我们在这项工作中提出了一种与标签距离(CLLD)的新型对比学习。灵感来自最近对比学习的进步,我们专门设计了一种具有标签距离的分类方法,用于学习对比类。 CLLD可确保在导致不同标签分配的细微差别中的灵活性,并为同时具有相似性的每个类生成不同的表示。关于公共基准和内部数据集的广泛实验表明,我们的方法提高了预先训练模型在分类任务上的性能。重要的是,我们的实验表明,学习的标签距离减轻了细胞的对抗性质。
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在合作的多代理增强学习(MARL)中,代理只能获得部分观察,有效利用本地信息至关重要。在长期观察期间,代理可以构建\ textit {意识},使队友减轻部分可观察性问题。但是,以前的MAL方法通常忽略了对本地信息的这种利用。为了解决这个问题,我们提出了一个新颖的框架,多代理\ textit {本地信息分解,以意识到队友}(linda),代理商通过该框架学会分解本地信息并为每个队友建立意识。我们将意识模拟为随机随机变量并执行表示学习,以确保意识表示的信息,通过最大程度地提高意识与相应代理的实际轨迹之间的相互信息。 Linda对特定算法是不可知论的,可以灵活地集成到不同的MARL方法中。足够的实验表明,所提出的框架从当地的部分观察结果中学习了信息丰富的意识,以更好地协作并显着提高学习绩效,尤其是在具有挑战性的任务上。
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Graph Neural Networks (GNNs) have shown satisfying performance on various graph learning tasks. To achieve better fitting capability, most GNNs are with a large number of parameters, which makes these GNNs computationally expensive. Therefore, it is difficult to deploy them onto edge devices with scarce computational resources, e.g., mobile phones and wearable smart devices. Knowledge Distillation (KD) is a common solution to compress GNNs, where a light-weighted model (i.e., the student model) is encouraged to mimic the behavior of a computationally expensive GNN (i.e., the teacher GNN model). Nevertheless, most existing GNN-based KD methods lack fairness consideration. As a consequence, the student model usually inherits and even exaggerates the bias from the teacher GNN. To handle such a problem, we take initial steps towards fair knowledge distillation for GNNs. Specifically, we first formulate a novel problem of fair knowledge distillation for GNN-based teacher-student frameworks. Then we propose a principled framework named RELIANT to mitigate the bias exhibited by the student model. Notably, the design of RELIANT is decoupled from any specific teacher and student model structures, and thus can be easily adapted to various GNN-based KD frameworks. We perform extensive experiments on multiple real-world datasets, which corroborates that RELIANT achieves less biased GNN knowledge distillation while maintaining high prediction utility.
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In this paper, we study the problem of knowledge-intensive text-to-SQL, in which domain knowledge is necessary to parse expert questions into SQL queries over domain-specific tables. We formalize this scenario by building a new Chinese benchmark KnowSQL consisting of domain-specific questions covering various domains. We then address this problem by presenting formulaic knowledge, rather than by annotating additional data examples. More concretely, we construct a formulaic knowledge bank as a domain knowledge base and propose a framework (ReGrouP) to leverage this formulaic knowledge during parsing. Experiments using ReGrouP demonstrate a significant 28.2% improvement overall on KnowSQL.
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To generate high quality rendering images for real time applications, it is often to trace only a few samples-per-pixel (spp) at a lower resolution and then supersample to the high resolution. Based on the observation that the rendered pixels at a low resolution are typically highly aliased, we present a novel method for neural supersampling based on ray tracing 1/4-spp samples at the high resolution. Our key insight is that the ray-traced samples at the target resolution are accurate and reliable, which makes the supersampling an interpolation problem. We present a mask-reinforced neural network to reconstruct and interpolate high-quality image sequences. First, a novel temporal accumulation network is introduced to compute the correlation between current and previous features to significantly improve their temporal stability. Then a reconstruct network based on a multi-scale U-Net with skip connections is adopted for reconstruction and generation of the desired high-resolution image. Experimental results and comparisons have shown that our proposed method can generate higher quality results of supersampling, without increasing the total number of ray-tracing samples, over current state-of-the-art methods.
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Panoptic Part Segmentation (PPS) unifies panoptic segmentation and part segmentation into one task. Previous works utilize separated approaches to handle thing, stuff, and part predictions without shared computation and task association. We aim to unify these tasks at the architectural level, designing the first end-to-end unified framework named Panoptic-PartFormer. Moreover, we find the previous metric PartPQ biases to PQ. To handle both issues, we make the following contributions: Firstly, we design a meta-architecture that decouples part feature and things/stuff feature, respectively. We model things, stuff, and parts as object queries and directly learn to optimize all three forms of prediction as a unified mask prediction and classification problem. We term our model as Panoptic-PartFormer. Secondly, we propose a new metric Part-Whole Quality (PWQ) to better measure such task from both pixel-region and part-whole perspectives. It can also decouple the error for part segmentation and panoptic segmentation. Thirdly, inspired by Mask2Former, based on our meta-architecture, we propose Panoptic-PartFormer++ and design a new part-whole cross attention scheme to further boost part segmentation qualities. We design a new part-whole interaction method using masked cross attention. Finally, the extensive ablation studies and analysis demonstrate the effectiveness of both Panoptic-PartFormer and Panoptic-PartFormer++. Compared with previous Panoptic-PartFormer, our Panoptic-PartFormer++ achieves 2% PartPQ and 3% PWQ improvements on the Cityscapes PPS dataset and 5% PartPQ on the Pascal Context PPS dataset. On both datasets, Panoptic-PartFormer++ achieves new state-of-the-art results with a significant cost drop of 70% on GFlops and 50% on parameters. Our models can serve as a strong baseline and aid future research in PPS. Code will be available.
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