深度学习方法已成为重建MR重建的最新采样的状态。特别是对于地面真理不可行或不可能的情况,要获取完全采样的数据,重建的自我监督的机器学习方法正在越来越多地使用。但是,在验证此类方法及其普遍性的验证中的潜在问题仍然没有得到充实的态度。在本文中,我们研究了自制算法验证未采样MR图像的重要方面:对前瞻性重建的定量评估,前瞻性和回顾性重建之间的潜在差异,常用的定量衡量标准的适用性和普遍性。研究了两种基于自我监督的denoising和先验的深层图像的自我监督算法。将这些方法与使用体内和幻影数据的最小二乘拟合以及压缩感测重建进行比较。它们的推广性通过前瞻性采样的数据与培训不同的数据进行了测试。我们表明,相对于回顾性重建/地面真理,前瞻性重建可能表现出严重的失真。此外,与感知度量相比,与像素定量指标的定量指标可能无法准确捕获感知质量的差异。此外,所有方法均显示出泛化的潜力。然而,与其他变化相比,概括性的影响更大。我们进一步表明,无参考图像指标与人类对图像质量的评级很好地对应,以研究概括性。最后,我们证明了经过调整的压缩感测重建和学习的DeNoising在所有数据上都相似地执行。
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Process monitoring and control are essential in modern industries for ensuring high quality standards and optimizing production performance. These technologies have a long history of application in production and have had numerous positive impacts, but also hold great potential when integrated with Industry 4.0 and advanced machine learning, particularly deep learning, solutions. However, in order to implement these solutions in production and enable widespread adoption, the scalability and transferability of deep learning methods have become a focus of research. While transfer learning has proven successful in many cases, particularly with computer vision and homogenous data inputs, it can be challenging to apply to heterogeneous data. Motivated by the need to transfer and standardize established processes to different, non-identical environments and by the challenge of adapting to heterogeneous data representations, this work introduces the Domain Adaptation Neural Network with Cyclic Supervision (DBACS) approach. DBACS addresses the issue of model generalization through domain adaptation, specifically for heterogeneous data, and enables the transfer and scalability of deep learning-based statistical control methods in a general manner. Additionally, the cyclic interactions between the different parts of the model enable DBACS to not only adapt to the domains, but also match them. To the best of our knowledge, DBACS is the first deep learning approach to combine adaptation and matching for heterogeneous data settings. For comparison, this work also includes subspace alignment and a multi-view learning that deals with heterogeneous representations by mapping data into correlated latent feature spaces. Finally, DBACS with its ability to adapt and match, is applied to a virtual metrology use case for an etching process run on different machine types in semiconductor manufacturing.
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An Anomaly Detection (AD) System for Self-diagnosis has been developed for Multiphase Flow Meter (MPFM). The system relies on machine learning algorithms for time series forecasting, historical data have been used to train a model and to predict the behavior of a sensor and, thus, to detect anomalies.
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Anomaly Detection is a relevant problem that arises in numerous real-world applications, especially when dealing with images. However, there has been little research for this task in the Continual Learning setting. In this work, we introduce a novel approach called SCALE (SCALing is Enough) to perform Compressed Replay in a framework for Anomaly Detection in Continual Learning setting. The proposed technique scales and compresses the original images using a Super Resolution model which, to the best of our knowledge, is studied for the first time in the Continual Learning setting. SCALE can achieve a high level of compression while maintaining a high level of image reconstruction quality. In conjunction with other Anomaly Detection approaches, it can achieve optimal results. To validate the proposed approach, we use a real-world dataset of images with pixel-based anomalies, with the scope to provide a reliable benchmark for Anomaly Detection in the context of Continual Learning, serving as a foundation for further advancements in the field.
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We introduce hp-greedy, a refinement approach for building gravitational wave surrogates as an extension of the standard reduced basis framework. Our proposal is data-driven, with a domain decomposition of the parameter space, local reduced basis, and a binary tree as the resulting structure, which are obtained in an automated way. When compared to the standard global reduced basis approach, the numerical simulations of our proposal show three salient features: i) representations of lower dimension with no loss of accuracy, ii) a significantly higher accuracy for a fixed maximum dimensionality of the basis, in some cases by orders of magnitude, and iii) results that depend on the reduced basis seed choice used by the refinement algorithm. We first illustrate the key parts of our approach with a toy model and then present a more realistic use case of gravitational waves emitted by the collision of two spinning, non-precessing black holes. We discuss performance aspects of hp-greedy, such as overfitting with respect to the depth of the tree structure, and other hyperparameter dependences. As two direct applications of the proposed hp-greedy refinement, we envision: i) a further acceleration of statistical inference, which might be complementary to focused reduced-order quadratures, and ii) the search of gravitational waves through clustering and nearest neighbors.
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这项工作在拆分计算领域迈出了重大步骤,即如何拆分深神经网络以将其早期部分托管在嵌入式设备上,而其余则在服务器上。到目前为止,已经确定了潜在的分裂位置,以利用独特的建筑方面,即基于层尺寸。在此范式下,只有在执行分裂并重新训练整个管道后,才能评估分裂的疗效,从而对所有合理的分裂点在时间方面进行详尽的评估。在这里,我们表明,不仅层的结构确实很重要,而且其中包含的神经元的重要性也很重要。如果神经元相对于正确的班级决策,神经元很重要。因此,应在具有高密度的重要神经元的层后立即施加拆分,以保留流动的信息。根据这个想法,我们提出了可解释的拆分(i-split):通过提供有关该分型在分类准确性方面的表现,事先对其有效实现的可靠性,以确定最合适的分裂点的过程。作为I-Split的另一个重大贡献,我们表明,多类分类问题的分裂点的最佳选择还取决于网络必须处理的特定类别。详尽的实验已在两个网络(VGG16和Resnet-50)以及三个数据集(Tiny-Imagenet-200,Notmnist和胸部X射线肺炎)上进行。源代码可在https://github.com/vips4/i-split上获得。
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传统的自动门不能区分希望穿过门和经过门的人们,因此他们经常不必要地打开。这导致需要在商业和非商业环境中采用新系统:智能门。特别是,智能门系统根据周围环境的社会环境预测了门附近的人们的意图,然后就是否打开门做出合理的决定。这项工作提出了与智能门有关的第一张纸张,没有铃铛和哨子。我们首先指出,问题不仅涉及可靠性,气候控制,安全性和操作方式。的确,通过对近亲学和场景推理的复杂结合分析,一种预测门附近人们意图的系统还涉及对场景的社会背景的更深入了解。此外,我们对自动门进行了详尽的文献综述,提供了一种新型的系统配方。此外,我们对智能门的未来应用,道德缺陷的描述和立法问题进行了分析。
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软机器人操纵器对于在受限环境中的医疗干预或工业检查等一系列应用都具有吸引力。文献中已经提出了无数的软机器人操纵器,但是它们的设计往往相对相似,并且通常提供相对较低的力。这限制了他们可以携带的有效载荷,因此限制了它们的可用性。在公共框架下不可用不同设计的力的比较,并且设计具有不同的直径和功能,使它们难以比较。在本文中,我们介绍了一种软机器人操纵器的设计,该设计的优化为最大化其力,同时尊重典型的应用程序约束,例如大小,工作区,有效负载能力和最大压力。此处介绍的设计具有一个优势,即它变为最佳设计,因为它被加压到朝不同方向移动,这会导致较高的横向力。该机器人是使用一组原理设计的,因此可以适应其他应用程序。我们还为软机器人操纵器提供了非二维分析,并将其应用于此处提出的设计的性能与文献中其他设计的性能。我们表明,我们的设计比同一类别中的其他设计具有更高的力量。实验结果证实了我们提出的设计的较高力量。
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FM合成是一种众所周知的算法,用于从紧凑的设计原始素中生成复杂的音色。通常具有MIDI接口,通常是不切实际的,从音频源进行控制。另一方面,可区分的数字信号处理(DDSP)已通过深度神经网络(DNN)启用了细微的音频渲染,这些音频渲染学会了从任意声音输入中控制可区分的合成层。训练过程涉及一系列音频进行监督和光谱重建损失功能。这样的功能虽然非常适合匹配光谱振幅,但却存在缺乏俯仰方向,这可能会阻碍FM合成器参数的关节优化。在本文中,我们采取了步骤,从音频输入中连续控制良好的FM合成体系结构。首先,我们讨论一组设计约束,通过标准重建损失来简化可区分的FM合成器的光谱优化。接下来,我们介绍可区分的DX7(DDX7),这是一种轻巧的体系结构,可根据一组紧凑的参数来进行乐器声音的神经FM重新合成。我们在从URMP数据集中提取的仪器样品上训练该模型,并定量证明其针对选定基准测试的音频质量可比。
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持续学习旨在从一系列任务中学习,能够同时记住新任务和旧任务。尽管提出了许多用于单级分类的方法,但在连续场景中,多标签分类仍然是一个具有挑战性的问题。我们第一次在域增量学习方案中研究多标签分类。此外,我们提出了一种有效的方法,该方法在任务数量方面具有对数复杂性,并且也可以在类增量学习方案中应用。我们在包装行业的现实世界多标签警报预测问题上验证了我们的方法。为了重现性,公开可用的数据集和用于实验的代码。
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