在本文中,我们通过利用给定数据集中的规律性来有效地介绍了一种新颖的方法来系统地解决数据集凝结问题。我们没有直接在原始输入空间中凝结数据集,而是假设数据集的生成过程,其中一组可学习的代码在紧凑的潜在空间中定义,然后是一组微型解码器,它们将它们映射到原始输入空间。通过互换组合不同的代码和解码器,我们可以大大增加具有相同参数计数的合成示例的数量,因为潜在空间要较低,并且由于我们可以假设尽可能多的解码器来捕获数据集中表示的不同样式费用微不足道。这种知识分解允许以系统的方式有效地共享综合示例之间的信息,从而在压缩比和生成的示例的质量之间进行了更高的权衡。我们通过实验表明,我们的方法通过各种基准数据集(例如SVHN,CIFAR10,CIFAR100和Tinyimagenet)在各种基准数据集上实现了新的最新记录。
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共享初始化参数的元学习已显示在解决少量学习任务方面非常有效。然而,将框架扩展到许多射击场景,这可能进一步提高其实用性,这一切相对忽略了由于内梯度步长的长链中的元学习的技术困难。在本文中,我们首先表明允许元学习者采取更多的内梯度步骤更好地捕获异构和大规模任务分布的结构,从而导致获得更好的初始化点。此外,为了增加元更新的频率,即使是过度长的内部优化轨迹,我们建议估计关于初始化参数的改变的任务特定参数的所需移位。通过这样做,我们可以随意增加元更新的频率,从而大大提高了元级收敛以及学习初始化的质量。我们验证了我们在异构的大规模任务集中验证了方法,并表明该算法在泛型性能和收敛方面以及多任务学习和微调基线方面主要优于先前的一阶元学习方法。 。
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正规化和转移学习是两种流行的技术,可以增强看不见数据的概念,这是机器学习的根本问题。正则化技术是多功能的,因为它们是任务和架构 - 不可知论,但它们不会利用大量数据。传输学习方法学会从一个域转移到另一个域的知识,但可能无法跨解任务和架构拓展,并且可能会引入适应目标任务的新培训成本。为了弥合两者之间的差距,我们提出了一种可转移的扰动,Metaperturb,这是荟萃学会,以提高看不见数据的泛化性能。 Metaperturb实现为基于集的轻量级网络,该网络是不可知的,其尺寸和输入的顺序,它们在整个层上共享。然后,我们提出了一个元学习框架,共同训练了与异构任务相同的扰动功能。正如Metaperturb在层次和任务的不同分布上训练的集合函数,它可以概括为异构任务和架构。通过将不同的神经架构应用于各种规范和微调,验证对特定源域和架构的Metaperturb培训的疗效和普遍性,验证了特定的源域和架构的疗效和普遍性。结果表明,Metaperturb培训的网络显着优于大多数任务和架构的基线,参数大小的忽略不计,并且没有封闭曲调。
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Affect understanding capability is essential for social robots to autonomously interact with a group of users in an intuitive and reciprocal way. However, the challenge of multi-person affect understanding comes from not only the accurate perception of each user's affective state (e.g., engagement) but also the recognition of the affect interplay between the members (e.g., joint engagement) that presents as complex, but subtle, nonverbal exchanges between them. Here we present a novel hybrid framework for identifying a parent-child dyad's joint engagement by combining a deep learning framework with various video augmentation techniques. Using a dataset of parent-child dyads reading storybooks together with a social robot at home, we first train RGB frame- and skeleton-based joint engagement recognition models with four video augmentation techniques (General Aug, DeepFake, CutOut, and Mixed) applied datasets to improve joint engagement classification performance. Second, we demonstrate experimental results on the use of trained models in the robot-parent-child interaction context. Third, we introduce a behavior-based metric for evaluating the learned representation of the models to investigate the model interpretability when recognizing joint engagement. This work serves as the first step toward fully unlocking the potential of end-to-end video understanding models pre-trained on large public datasets and augmented with data augmentation and visualization techniques for affect recognition in the multi-person human-robot interaction in the wild.
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虽然工业互联网的东西已经增加了工业设备中永久安装的传感器数量,但由于在石化工业中非常大的植物中的传感器或稀疏密度,覆盖率将存在差距。现代应急响应操作开始使用具有能够将传感器机器人丢弃到精确位置的小型无人机系统(SUAS)。 SUA可以提供长期持续监控,即航空无人机无法提供。尽管这些资产的成本相对较低,但是选择哪个机器人传感系统部署在紧急响应期间复杂的植物环境中的工业过程中的哪一部分仍然具有挑战性。本文介绍了一种优化应急传感器部署作为实现机器人在灾区响应的初步步骤的框架。 AI技术(长期内存,1维卷积神经网络,逻辑回归和随机林)识别传感器最有价值的区域,而无需人类进入潜在的危险区域。在描述的情况下,优化的成本函数考虑了假阳性和假阴性错误的成本。减缓的决定包括实施维修或关闭工厂。信息(EVI)的预期值用于识别要部署的最有价值的类型和物理传感器的位置,以增加传感器网络的决策分析值。该方法应用于使用化学植物的田纳西州伊士曼流程数据集的案例研究,我们讨论了我们对植物紧急情况和弹性情景中传感器的操作,分配和决策的影响的影响。
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最近的一些研究描述了深层卷积神经网络,以诊断与人类专家相似甚至卓越表现的乳腺癌乳腺癌。最好的技术之一可以进行两种转移学习:第一个使用在自然图像上训练的模型来创建“补丁分类器”,该模型将小型子图表分类;第二个使用补丁分类器来扫描整个乳房X线照片并创建“单视图全图分类器”。我们建议进行第三次转移学习,以获取“两视图分类器”,以使用两种乳房X线摄影视图:双侧颅颅和中外侧倾斜。我们使用效率网络作为模型的基础。我们使用CBIS-DDSM数据集“端到端”训练整个系统。为了确保统计鲁棒性,我们使用以下方式两次测试系统,(a)5倍交叉验证; (b)数据集的原始培训/测试部门。我们的技术使用5倍的交叉验证达到0.9344的AUC(在ROC的误差率相等的误差率下,准确性,灵敏度和特异性为85.13%)。据我们所知,使用原始的数据集除法,我们的技术达到了0.8483,尽管我们知道的最高的AUC在此问题上,尽管每项工作的测试条件上的细微差异不允许进行准确的比较。推理代码和模型可在https://github.com/dpetrini/two-views-classifier上获得
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复杂的网络分析提供了在数值模型的帮助下提高电网稳定性的线索。然而,数值模拟的高计算成本抑制了这种方法,特别是当它涉及频率同步的电网的动态特性时。在这项研究中,我们调查了机器学习技术来估计电网同步的稳定性。我们测试三种不同的机器学习算法 - 随机森林,支持向量机和人工神经网络 - 用两种不同类型的合成电网培训,分别由均匀和异构输入功率分布组成。我们发现三台机器学习模型更好地预测电网节点的同步稳定性,当它们被异构输入功率分布训练而不是均匀的电网节点。利用英国,西班牙,法国和德国的现实世界电网,我们还证明了在合成电网上培训的机器学习算法可转换为现实世界电网的稳定性预测,这意味着前瞻性适用性电网研究机器学习技术。
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The 3D-aware image synthesis focuses on conserving spatial consistency besides generating high-resolution images with fine details. Recently, Neural Radiance Field (NeRF) has been introduced for synthesizing novel views with low computational cost and superior performance. While several works investigate a generative NeRF and show remarkable achievement, they cannot handle conditional and continuous feature manipulation in the generation procedure. In this work, we introduce a novel model, called Class-Continuous Conditional Generative NeRF ($\text{C}^{3}$G-NeRF), which can synthesize conditionally manipulated photorealistic 3D-consistent images by projecting conditional features to the generator and the discriminator. The proposed $\text{C}^{3}$G-NeRF is evaluated with three image datasets, AFHQ, CelebA, and Cars. As a result, our model shows strong 3D-consistency with fine details and smooth interpolation in conditional feature manipulation. For instance, $\text{C}^{3}$G-NeRF exhibits a Fr\'echet Inception Distance (FID) of 7.64 in 3D-aware face image synthesis with a $\text{128}^{2}$ resolution. Additionally, we provide FIDs of generated 3D-aware images of each class of the datasets as it is possible to synthesize class-conditional images with $\text{C}^{3}$G-NeRF.
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Cellular automata (CA) captivate researchers due to teh emergent, complex individualized behavior that simple global rules of interaction enact. Recent advances in the field have combined CA with convolutional neural networks to achieve self-regenerating images. This new branch of CA is called neural cellular automata [1]. The goal of this project is to use the idea of idea of neural cellular automata to grow prediction machines. We place many different convolutional neural networks in a grid. Each conv net cell outputs a prediction of what the next state will be, and minimizes predictive error. Cells received their neighbors' colors and fitnesses as input. Each cell's fitness score described how accurate its predictions were. Cells could also move to explore their environment and some stochasticity was applied to movement.
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There is a dramatic shortage of skilled labor for modern vineyards. The Vinum project is developing a mobile robotic solution to autonomously navigate through vineyards for winter grapevine pruning. This necessitates an autonomous navigation stack for the robot pruning a vineyard. The Vinum project is using the quadruped robot HyQReal. This paper introduces an architecture for a quadruped robot to autonomously move through a vineyard by identifying and approaching grapevines for pruning. The higher level control is a state machine switching between searching for destination positions, autonomously navigating towards those locations, and stopping for the robot to complete a task. The destination points are determined by identifying grapevine trunks using instance segmentation from a Mask Region-Based Convolutional Neural Network (Mask-RCNN). These detections are sent through a filter to avoid redundancy and remove noisy detections. The combination of these features is the basis for the proposed architecture.
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