As the societal impact of Deep Neural Networks (DNNs) grows, the goals for advancing DNNs become more complex and diverse, ranging from improving a conventional model accuracy metric to infusing advanced human virtues such as fairness, accountability, transparency (FaccT), and unbiasedness. Recently, techniques in Explainable Artificial Intelligence (XAI) are attracting considerable attention, and have tremendously helped Machine Learning (ML) engineers in understanding AI models. However, at the same time, we started to witness the emerging need beyond XAI among AI communities; based on the insights learned from XAI, how can we better empower ML engineers in steering their DNNs so that the model's reasonableness and performance can be improved as intended? This article provides a timely and extensive literature overview of the field Explanation-Guided Learning (EGL), a domain of techniques that steer the DNNs' reasoning process by adding regularization, supervision, or intervention on model explanations. In doing so, we first provide a formal definition of EGL and its general learning paradigm. Secondly, an overview of the key factors for EGL evaluation, as well as summarization and categorization of existing evaluation procedures and metrics for EGL are provided. Finally, the current and potential future application areas and directions of EGL are discussed, and an extensive experimental study is presented aiming at providing comprehensive comparative studies among existing EGL models in various popular application domains, such as Computer Vision (CV) and Natural Language Processing (NLP) domains.
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图扩散问题,例如谣言,计算机病毒或智能电网故障的传播是无处不在的和社会的。因此,根据当前的图扩散观测值鉴定扩散源通常至关重要。尽管在实践中具有巨大的必要性和意义,但作为图扩散的逆问题,源定位是极具挑战性的,因为它的规模不足:不同的来源可能导致相同的图形扩散模式。与大多数传统的来源本地化方法不同,本文着重于概率方式,以说明不同候选来源的不确定性。这样的努力需要克服挑战,包括1)很难量化图形扩散源定位的不确定性; 2)图形扩散源的复杂模式很难被概率地表征; 3)很难强加任何潜在的扩散模式下的概括。为了解决上述挑战,本文提出了一个通用框架:用于在任意扩散模式下定位扩散源的源定位变异自动编码器(SL-VAE)。特别是,我们提出了一个概率模型,该模型利用正向扩散估计模型以及深生成模型来近似扩散源分布,以量化不确定性。 SL-VAE进一步利用了对源观察对的先验知识来表征通过学识渊博的生成性先验的扩散源的复杂模式。最后,一个集成正向扩散估计模型的统一目标被得出以强制执行模型以在任意扩散模式下概括。在7个现实世界数据集上进行了广泛的实验,以证明SL-VAE在重建扩散源的优势通过在AUC分数中平均20%来重建扩散源。
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将图形扩散现象的来源定位,例如错误信息传播,是一项重要但极具挑战性的任务。现有的源本地化模型通常在很大程度上取决于手工制作的规则。不幸的是,许多应用程序的图扩散过程的很大一部分仍然是人类未知的,因此拥有自动学习此类基础规则的表达模型很重要。本文旨在建立一个可逆图扩散模型的通用框架,用于在图上源定位,即可逆有效性感知图扩散(IVGD),以应对主要挑战,包括1)难以利用图形扩散模型中的知识来建模其反相反过程以端到端的方式,2)难以确保推断来源的有效性,3)源推理的效率和可扩展性。具体而言,首先,为了反向推断图形扩散源,我们提出了图形残差方案,以使现有的图形扩散模型具有理论保证。其次,我们开发了一种新颖的错误补偿机制,该机制学会抵消推断来源的错误。最后,为了确保推断资源的有效性,通过灵活地通过使用展开的优化技术来灵活地编码约束来,已经设计了一组新的有效性层层将推断为可行区域的源。提出了一种线性化技术来增强我们提出的层的效率。理论上证明了所提出的IVGD的收敛性。对九个现实世界数据集进行的广泛实验表明,我们提出的IVGD的表现明显优于最先进的比较方法。我们已经在https://github.com/xianggebenben/ivgd上发布了代码。
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深度学习已被广​​泛用于推断强大的掌握。虽然最初用于学习掌握配置的人类标记的RGB-D数据集,但是这种大型数据集的准备是昂贵的。为了解决这个问题,通过物理模拟器生成图像,并且使用物理启发模型(例如,抽吸真空杯和物体之间的接触型号)作为掌握质量评估度量来注释合成图像。然而,这种联系方式复杂,需要通过实验进行参数识别,以确保真实的世界表现。此外,以前的研究还没有考虑机器人可达性,例如当具有高抓握质量的掌握配置由于机器人的碰撞或物理限制而无法到达目标时无法到达目标。在这项研究中,我们提出了一种直观的几何分析掌握质量评估度量。我们进一步纳入了可达性评估度量。我们通过拟议的评估度量对模拟器中的合成图像上的综合评估标准进行注释,以培训称为抽吸贪污U-Net ++(SG-U-Net ++)的自动编码器解码器。实验结果表明,我们直观的掌握质量评估度量与物理启发度量有竞争力。学习可达性有助于通过消除明显无法访问的候选者来减少运动规划计算时间。该系统实现了560pph(每小时碎片)的整体拾取速度。
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This paper focuses on designing efficient models with low parameters and FLOPs for dense predictions. Even though CNN-based lightweight methods have achieved stunning results after years of research, trading-off model accuracy and constrained resources still need further improvements. This work rethinks the essential unity of efficient Inverted Residual Block in MobileNetv2 and effective Transformer in ViT, inductively abstracting a general concept of Meta-Mobile Block, and we argue that the specific instantiation is very important to model performance though sharing the same framework. Motivated by this phenomenon, we deduce a simple yet efficient modern \textbf{I}nverted \textbf{R}esidual \textbf{M}obile \textbf{B}lock (iRMB) for mobile applications, which absorbs CNN-like efficiency to model short-distance dependency and Transformer-like dynamic modeling capability to learn long-distance interactions. Furthermore, we design a ResNet-like 4-phase \textbf{E}fficient \textbf{MO}del (EMO) based only on a series of iRMBs for dense applications. Massive experiments on ImageNet-1K, COCO2017, and ADE20K benchmarks demonstrate the superiority of our EMO over state-of-the-art methods, \eg, our EMO-1M/2M/5M achieve 71.5, 75.1, and 78.4 Top-1 that surpass \textbf{SoTA} CNN-/Transformer-based models, while trading-off the model accuracy and efficiency well.
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We aim to bridge the gap between our common-sense few-sample human learning and large-data machine learning. We derive a theory of human-like few-shot learning from von-Neuman-Landauer's principle. modelling human learning is difficult as how people learn varies from one to another. Under commonly accepted definitions, we prove that all human or animal few-shot learning, and major models including Free Energy Principle and Bayesian Program Learning that model such learning, approximate our theory, under Church-Turing thesis. We find that deep generative model like variational autoencoder (VAE) can be used to approximate our theory and perform significantly better than baseline models including deep neural networks, for image recognition, low resource language processing, and character recognition.
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Despite significant progress in object categorization, in recent years, a number of important challenges remain; mainly, the ability to learn from limited labeled data and to recognize object classes within large, potentially open, set of labels. Zero-shot learning is one way of addressing these challenges, but it has only been shown to work with limited sized class vocabularies and typically requires separation between supervised and unsupervised classes, allowing former to inform the latter but not vice versa. We propose the notion of vocabulary-informed learning to alleviate the above mentioned challenges and address problems of supervised, zero-shot, generalized zero-shot and open set recognition using a unified framework. Specifically, we propose a weighted maximum margin framework for semantic manifold-based recognition that incorporates distance constraints from (both supervised and unsupervised) vocabulary atoms. Distance constraints ensure that labeled samples are projected closer to their correct prototypes, in the embedding space, than to others. We illustrate that resulting model shows improvements in supervised, zero-shot, generalized zero-shot, and large open set recognition, with up to 310K class vocabulary on Animal with Attributes and ImageNet datasets.
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We consider infinite horizon Markov decision processes (MDPs) with fast-slow structure, meaning that certain parts of the state space move "fast" (and in a sense, are more influential) while other parts transition more "slowly." Such structure is common in real-world problems where sequential decisions need to be made at high frequencies, yet information that varies at a slower timescale also influences the optimal policy. Examples include: (1) service allocation for a multi-class queue with (slowly varying) stochastic costs, (2) a restless multi-armed bandit with an environmental state, and (3) energy demand response, where both day-ahead and real-time prices play a role in the firm's revenue. Models that fully capture these problems often result in MDPs with large state spaces and large effective time horizons (due to frequent decisions), rendering them computationally intractable. We propose an approximate dynamic programming algorithmic framework based on the idea of "freezing" the slow states, solving a set of simpler finite-horizon MDPs (the lower-level MDPs), and applying value iteration (VI) to an auxiliary MDP that transitions on a slower timescale (the upper-level MDP). We also extend the technique to a function approximation setting, where a feature-based linear architecture is used. On the theoretical side, we analyze the regret incurred by each variant of our frozen-state approach. Finally, we give empirical evidence that the frozen-state approach generates effective policies using just a fraction of the computational cost, while illustrating that simply omitting slow states from the decision modeling is often not a viable heuristic.
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We present Muse, a text-to-image Transformer model that achieves state-of-the-art image generation performance while being significantly more efficient than diffusion or autoregressive models. Muse is trained on a masked modeling task in discrete token space: given the text embedding extracted from a pre-trained large language model (LLM), Muse is trained to predict randomly masked image tokens. Compared to pixel-space diffusion models, such as Imagen and DALL-E 2, Muse is significantly more efficient due to the use of discrete tokens and requiring fewer sampling iterations; compared to autoregressive models, such as Parti, Muse is more efficient due to the use of parallel decoding. The use of a pre-trained LLM enables fine-grained language understanding, translating to high-fidelity image generation and the understanding of visual concepts such as objects, their spatial relationships, pose, cardinality etc. Our 900M parameter model achieves a new SOTA on CC3M, with an FID score of 6.06. The Muse 3B parameter model achieves an FID of 7.88 on zero-shot COCO evaluation, along with a CLIP score of 0.32. Muse also directly enables a number of image editing applications without the need to fine-tune or invert the model: inpainting, outpainting, and mask-free editing. More results are available at https://muse-model.github.io
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Reinforcement Learning (RL) is currently one of the most commonly used techniques for traffic signal control (TSC), which can adaptively adjusted traffic signal phase and duration according to real-time traffic data. However, a fully centralized RL approach is beset with difficulties in a multi-network scenario because of exponential growth in state-action space with increasing intersections. Multi-agent reinforcement learning (MARL) can overcome the high-dimension problem by employing the global control of each local RL agent, but it also brings new challenges, such as the failure of convergence caused by the non-stationary Markov Decision Process (MDP). In this paper, we introduce an off-policy nash deep Q-Network (OPNDQN) algorithm, which mitigates the weakness of both fully centralized and MARL approaches. The OPNDQN algorithm solves the problem that traditional algorithms cannot be used in large state-action space traffic models by utilizing a fictitious game approach at each iteration to find the nash equilibrium among neighboring intersections, from which no intersection has incentive to unilaterally deviate. One of main advantages of OPNDQN is to mitigate the non-stationarity of multi-agent Markov process because it considers the mutual influence among neighboring intersections by sharing their actions. On the other hand, for training a large traffic network, the convergence rate of OPNDQN is higher than that of existing MARL approaches because it does not incorporate all state information of each agent. We conduct an extensive experiments by using Simulation of Urban MObility simulator (SUMO), and show the dominant superiority of OPNDQN over several existing MARL approaches in terms of average queue length, episode training reward and average waiting time.
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