我们研究了精神病学临床领域中脑唤醒的调节改变了面部行为的统计特性。潜在的机制与对某些心理状态的行为替代测量的警惕性连续体的经验解释有关。我们以基于经典的头皮的审视传感器(OEG)的意义命名了所提出的测量,该传感器光电脑摄影(OEG)仅依赖于现代基于摄像机的实时信号处理和计算机视觉。基于随机表示作为面部动力学的连贯性,反映了情绪表达中的半径不对称性,我们证明了患者与健康对照之间几乎没有完美的区别,以及精神疾病抑郁症和精神分裂症和症状的严重性。与标准诊断过程相反,该过程耗时,主观,不包含神经生物学数据,例如实时面部动力学,情感响应能力的客观随机建模仅需要几分钟的基于视频的面部录制。我们还强调了该方法作为因果推断模型在转诊分析中的潜力,以预测药理治疗的结果。所有结果均在临床纵向数据收集中获得,其中有100名患者和50例对照。
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Multivariate time series forecasting constitutes important functionality in cyber-physical systems, whose prediction accuracy can be improved significantly by capturing temporal and multivariate correlations among multiple time series. State-of-the-art deep learning methods fail to construct models for full time series because model complexity grows exponentially with time series length. Rather, these methods construct local temporal and multivariate correlations within subsequences, but fail to capture correlations among subsequences, which significantly affect their forecasting accuracy. To capture the temporal and multivariate correlations among subsequences, we design a pattern discovery model, that constructs correlations via diverse pattern functions. While the traditional pattern discovery method uses shared and fixed pattern functions that ignore the diversity across time series. We propose a novel pattern discovery method that can automatically capture diverse and complex time series patterns. We also propose a learnable correlation matrix, that enables the model to capture distinct correlations among multiple time series. Extensive experiments show that our model achieves state-of-the-art prediction accuracy.
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Sensors in cyber-physical systems often capture interconnected processes and thus emit correlated time series (CTS), the forecasting of which enables important applications. The key to successful CTS forecasting is to uncover the temporal dynamics of time series and the spatial correlations among time series. Deep learning-based solutions exhibit impressive performance at discerning these aspects. In particular, automated CTS forecasting, where the design of an optimal deep learning architecture is automated, enables forecasting accuracy that surpasses what has been achieved by manual approaches. However, automated CTS solutions remain in their infancy and are only able to find optimal architectures for predefined hyperparameters and scale poorly to large-scale CTS. To overcome these limitations, we propose SEARCH, a joint, scalable framework, to automatically devise effective CTS forecasting models. Specifically, we encode each candidate architecture and accompanying hyperparameters into a joint graph representation. We introduce an efficient Architecture-Hyperparameter Comparator (AHC) to rank all architecture-hyperparameter pairs, and we then further evaluate the top-ranked pairs to select a final result. Extensive experiments on six benchmark datasets demonstrate that SEARCH not only eliminates manual efforts but also is capable of better performance than manually designed and existing automatically designed CTS models. In addition, it shows excellent scalability to large CTS.
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Despite being responsible for state-of-the-art results in several computer vision and natural language processing tasks, neural networks have faced harsh criticism due to some of their current shortcomings. One of them is that neural networks are correlation machines prone to model biases within the data instead of focusing on actual useful causal relationships. This problem is particularly serious in application domains affected by aspects such as race, gender, and age. To prevent models from incurring on unfair decision-making, the AI community has concentrated efforts in correcting algorithmic biases, giving rise to the research area now widely known as fairness in AI. In this survey paper, we provide an in-depth overview of the main debiasing methods for fairness-aware neural networks in the context of vision and language research. We propose a novel taxonomy to better organize the literature on debiasing methods for fairness, and we discuss the current challenges, trends, and important future work directions for the interested researcher and practitioner.
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The goal of autonomous vehicles is to navigate public roads safely and comfortably. To enforce safety, traditional planning approaches rely on handcrafted rules to generate trajectories. Machine learning-based systems, on the other hand, scale with data and are able to learn more complex behaviors. However, they often ignore that agents and self-driving vehicle trajectory distributions can be leveraged to improve safety. In this paper, we propose modeling a distribution over multiple future trajectories for both the self-driving vehicle and other road agents, using a unified neural network architecture for prediction and planning. During inference, we select the planning trajectory that minimizes a cost taking into account safety and the predicted probabilities. Our approach does not depend on any rule-based planners for trajectory generation or optimization, improves with more training data and is simple to implement. We extensively evaluate our method through a realistic simulator and show that the predicted trajectory distribution corresponds to different driving profiles. We also successfully deploy it on a self-driving vehicle on urban public roads, confirming that it drives safely without compromising comfort. The code for training and testing our model on a public prediction dataset and the video of the road test are available at https://woven.mobi/safepathnet
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社会过程的持续数字化转化为时间序列数据的扩散,这些数据涵盖了诸如欺诈检测,入侵检测和能量管理等应用,在这种应用程序中,异常检测通常对于启用可靠性和安全性至关重要。许多最近的研究针对时间序列数据的异常检测。实际上,时间序列异常检测的特征是不同的数据,方法和评估策略,现有研究中的比较仅考虑了这种多样性的一部分,这使得很难为特定问题设置选择最佳方法。为了解决这一缺点,我们介绍了有关数据,方法和评估策略的分类法,并使用分类法提供了无监督时间序列检测的全面概述,并系统地评估和比较了最先进的传统以及深度学习技术。在使用九个公开可用数据集的实证研究中,我们将最常用的性能评估指标应用于公平实施标准下的典型方法。根据分类法提供的结构化,我们报告了经验研究,并以比较表的形式提供指南,以选择最适合特定应用程序设置的方法。最后,我们为这个动态领域提出了研究方向。
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深度学习技术在各种任务中都表现出了出色的有效性,并且深度学习具有推进多种应用程序(包括在边缘计算中)的潜力,其中将深层模型部署在边缘设备上,以实现即时的数据处理和响应。一个关键的挑战是,虽然深层模型的应用通常会产生大量的内存和计算成本,但Edge设备通常只提供非常有限的存储和计算功能,这些功能可能会在各个设备之间差异很大。这些特征使得难以构建深度学习解决方案,以释放边缘设备的潜力,同时遵守其约束。应对这一挑战的一种有希望的方法是自动化有效的深度学习模型的设计,这些模型轻巧,仅需少量存储,并且仅产生低计算开销。该调查提供了针对边缘计算的深度学习模型设计自动化技术的全面覆盖。它提供了关键指标的概述和比较,这些指标通常用于量化模型在有效性,轻度和计算成本方面的水平。然后,该调查涵盖了深层设计自动化技术的三类最新技术:自动化神经体系结构搜索,自动化模型压缩以及联合自动化设计和压缩。最后,调查涵盖了未来研究的开放问题和方向。
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人工智能(AI),机器学习和深度学习(DL)方法在生物医学图像分析领域变得越来越重要。但是,为了利用此类方法的全部潜力,需要作为训练数据代表数量的实验获得的图像,其中包含大量手动注释对象。在这里,我们将语法(合成数据)介绍为一种新的方法,用于生成合成,光现实和高度复杂的生物医学图像作为DL系统的训练数据。我们在组织学切片中的肌肉纤维和结缔组织分析的背景下显示了方法的多功能性。我们证明,可以在以前看不见的现实世界数据上执行强大和专家级的细分任务,而无需仅使用合成训练数据进行手动注释。作为一种完全参数技术,我们的方法为生成对抗网络(GAN)构成了可解释的可控替代方案,并且有可能在显微镜及其他地区的各种生物医学应用中显着加速定量图像分析。
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部署到现实世界的自主智能代理必须与对感官输入的对抗性攻击保持强大的态度。在加强学习中的现有工作集中于最小值扰动攻击,这些攻击最初是为了模仿计算机视觉中感知不变性的概念。在本文中,我们注意到,这种最小值扰动攻击可以由受害者琐碎地检测到,因为这些导致观察序列与受害者的行为不符。此外,许多现实世界中的代理商(例如物理机器人)通常在人类主管下运行,这些代理商不容易受到这种扰动攻击的影响。结果,我们建议专注于幻觉攻击,这是一种与受害者的世界模式一致的新型攻击形式。我们为这个新颖的攻击框架提供了正式的定义,在各种条件下探索了其特征,并得出结论,代理必须寻求现实主义反馈以对幻觉攻击具有强大的态度。
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我们都取决于流动性,车辆运输会影响我们大多数人的日常生活。因此,预测道路网络中流量状态的能力是一项重要的功能和具有挑战性的任务。流量数据通常是从部署在道路网络中的传感器获得的。关于时空图神经网络的最新建议通过将流量数据建模为扩散过程,在交通数据中建模复杂的时空相关性方面取得了巨大进展。但是,直观地,流量数据包含两种不同类型的隐藏时间序列信号,即扩散信号和固有信号。不幸的是,几乎所有以前的作品都将交通信号完全视为扩散的结果,同时忽略了固有的信号,这会对模型性能产生负面影响。为了提高建模性能,我们提出了一种新型的脱钩时空框架(DSTF),该框架以数据驱动的方式将扩散和固有的交通信息分开,其中包含独特的估计门和残差分解机制。分离的信号随后可以通过扩散和固有模块分别处理。此外,我们提出了DSTF的实例化,分离的动态时空图神经网络(D2STGNN),可捕获时空相关性,还具有动态图学习模块,该模块针对学习流量网络动态特征的学习。使用四个现实世界流量数据集进行的广泛实验表明,该框架能够推进最先进的框架。
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