我们提出了一个新的灵敏度分析模型,该模型结合了Copulas和在未观察到的混杂状态下的因果推断的标准化。我们将新模型称为$ \ rho $ -gnf($ \ rho $ - graphical正常化流),其中$ \ rho {\ in} [ - 1,+1] $是一个有界灵敏度参数,表示后门非 - 由于未观察到的混杂而引起的因果关系,使用研究最丰富且广泛流行的高斯副群建模。具体而言,$ \ rho $ -gnf使我们能够估计和分析前门因果效应或平均因果效应(ACE)作为$ \ rho $的函数。我们将其称为$ \ rho_ {curve} $。 $ \ rho_ {curve} $使我们能够指定无王牌所需的混杂力量。我们将其称为$ \ rho_ {value} $。此外,$ \ rho_ {curve} $还使我们能够为$ \ rho $ values的间隔提供ACE的界限。我们说明了$ \ rho $ -gnf的好处,并通过对我们的经验王牌界限的实验比其他流行的王牌范围更狭窄。
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我们提出了一种评估真正因果效应对未测量混杂性的敏感性的方法。该方法要求分析师设置两个直观的参数。否则,该方法是无假设的。该方法返回包含真正因果效果的间隔,并且其界限是尖锐的,即它。我们通过实验展示我们的界限可以比通过丁和vanderweele(2016a)的方法所获得的界限更敏锐,而且,这需要比我们的方法设置一个参数。最后,当有测量的调解员和未测量的暴露 - 结果混淆时,我们将我们的方法扩展到结合自然直接和间接效应。
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我们通过表示单独连接的路径图来扩展路径分析,两个随机变量的部分协方差根据节点和变量之间的路径中的节点和边缘进行分解。此结果允许我们显示SIMPSON的悖论不能在单个连接的路径图中发生。
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This short report reviews the current state of the research and methodology on theoretical and practical aspects of Artificial Neural Networks (ANN). It was prepared to gather state-of-the-art knowledge needed to construct complex, hypercomplex and fuzzy neural networks. The report reflects the individual interests of the authors and, by now means, cannot be treated as a comprehensive review of the ANN discipline. Considering the fast development of this field, it is currently impossible to do a detailed review of a considerable number of pages. The report is an outcome of the Project 'The Strategic Research Partnership for the mathematical aspects of complex, hypercomplex and fuzzy neural networks' meeting at the University of Warmia and Mazury in Olsztyn, Poland, organized in September 2022.
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Nowadays, the applications of hydraulic systems are present in a wide variety of devices in both industrial and everyday environments. The implementation and usage of hydraulic systems have been well documented; however, today, this still faces a challenge, the integration of tools that allow more accurate information about the functioning and operation of these systems for proactive decision-making. In industrial applications, many sensors and methods exist to measure and determine the status of process variables (e.g., flow, pressure, force). Nevertheless, little has been done to have systems that can provide users with device-health information related to hydraulic devices integrated into the machinery. Implementing artificial intelligence (AI) technologies and machine learning (ML) models in hydraulic system components has been identified as a solution to the challenge many industries currently face: optimizing processes and carrying them out more safely and efficiently. This paper presents a solution for the characterization and estimation of anomalies in one of the most versatile and used devices in hydraulic systems, cylinders. AI and ML models were implemented to determine the current operating status of these hydraulic components and whether they are working correctly or if a failure mode or abnormal condition is present.
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Bayesian Optimization is a useful tool for experiment design. Unfortunately, the classical, sequential setting of Bayesian Optimization does not translate well into laboratory experiments, for instance battery design, where measurements may come from different sources and their evaluations may require significant waiting times. Multi-fidelity Bayesian Optimization addresses the setting with measurements from different sources. Asynchronous batch Bayesian Optimization provides a framework to select new experiments before the results of the prior experiments are revealed. This paper proposes an algorithm combining multi-fidelity and asynchronous batch methods. We empirically study the algorithm behavior, and show it can outperform single-fidelity batch methods and multi-fidelity sequential methods. As an application, we consider designing electrode materials for optimal performance in pouch cells using experiments with coin cells to approximate battery performance.
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Large language models (LLMs) have been shown to be able to perform new tasks based on a few demonstrations or natural language instructions. While these capabilities have led to widespread adoption, most LLMs are developed by resource-rich organizations and are frequently kept from the public. As a step towards democratizing this powerful technology, we present BLOOM, a 176B-parameter open-access language model designed and built thanks to a collaboration of hundreds of researchers. BLOOM is a decoder-only Transformer language model that was trained on the ROOTS corpus, a dataset comprising hundreds of sources in 46 natural and 13 programming languages (59 in total). We find that BLOOM achieves competitive performance on a wide variety of benchmarks, with stronger results after undergoing multitask prompted finetuning. To facilitate future research and applications using LLMs, we publicly release our models and code under the Responsible AI License.
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Structured channel pruning has been shown to significantly accelerate inference time for convolution neural networks (CNNs) on modern hardware, with a relatively minor loss of network accuracy. Recent works permanently zero these channels during training, which we observe to significantly hamper final accuracy, particularly as the fraction of the network being pruned increases. We propose Soft Masking for cost-constrained Channel Pruning (SMCP) to allow pruned channels to adaptively return to the network while simultaneously pruning towards a target cost constraint. By adding a soft mask re-parameterization of the weights and channel pruning from the perspective of removing input channels, we allow gradient updates to previously pruned channels and the opportunity for the channels to later return to the network. We then formulate input channel pruning as a global resource allocation problem. Our method outperforms prior works on both the ImageNet classification and PASCAL VOC detection datasets.
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深度学习已在许多神经影像应用中有效。但是,在许多情况下,捕获与小血管疾病有关的信息的成像序列的数量不足以支持数据驱动的技术。此外,基于队列的研究可能并不总是具有用于准确病变检测的最佳或必需成像序列。因此,有必要确定哪些成像序列对于准确检测至关重要。在这项研究中,我们旨在找到磁共振成像(MRI)序列的最佳组合,以深入基于学习的肿瘤周围空间(EPV)。为此,我们实施了一个有效的轻巧U-NET,适用于EPVS检测,并全面研究了来自易感加权成像(SWI),流体侵入的反转恢复(FLAIR),T1加权(T1W)和T2的不同信息组合 - 加权(T2W)MRI序列。我们得出的结论是,T2W MRI对于准确的EPV检测最为重要,并且在深神经网络中掺入SWI,FLAIR和T1W MRI可能会使精度的提高无关。
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从其随机传播低分辨率的结果中,推断流行病学系统中扰动的时机和幅度与具有挑战性一样重要。这是当前方法的必要条件,以克服了解进行分析的扰动细节的需求。但是,将流行病学曲线与潜在发生率连接起来的总体问题缺乏其他反问题中存在的高效方法,例如超分辨率和从计算机视觉中脱颖而出。在这里,我们开发了一种无监督的物理知识的卷积神经网络方法,以相反,以将死亡记录与发病率联系起来,以识别单日解决方案的政权变化。该方法适用于适当的正规化和模型选择标准的COVID-19数据,可以在一年的时间范围内确定锁定和其他非药物干预措施的实施和去除和其他非药物干预措施。
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