风力涡轮机刀片中的冰积累可能导致它们描述异常旋转或根本没有旋转,从而影响电力和功率输出的产生。在这项工作中,我们通过将其作为异常检测多变频时间序列来调查风力涡轮机中的冰积累问题。我们的方法侧重于两个主要部分:首先,使用变分性复发性AutoEncoder(VRAE)学习时间序列的低维表示,并使用无监督的聚类算法将学习的表示分类为正常(无冰积累)或异常(ICE)积累)。我们在自定义风力涡轮机时间序列数据集中评估了我们的方法,对于两班问题(一个正常与一个异常类),我们获得了最多96美元的分类准确性。对于多级问题(一个正常与多种异常类别),我们对低维学习潜空间的定性分析,提供了对我们解决此类问题的方法的能力的见解。重现这项工作的代码可以在这里找到https://github.com/agrija9/wind-turbines-vraepaper。
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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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人类机器人相互作用(HRI)对于在日常生活中广泛使用机器人至关重要。机器人最终将能够通过有效的社会互动来履行人类文明的各种职责。创建直接且易于理解的界面,以与机器人开始在个人工作区中扩散时与机器人互动至关重要。通常,与模拟机器人的交互显示在屏幕上。虚拟现实(VR)是一个更具吸引力的替代方法,它为视觉提示提供了更像现实世界中看到的线索。在这项研究中,我们介绍了Jubileo,这是一种机器人的动画面孔,并使用人类机器人社会互动领域的各种研究和应用开发工具。Jubileo Project不仅提供功能齐全的开源物理机器人。它还提供了一个全面的框架,可以通过VR接口进行操作,从而为HRI应用程序测试带来沉浸式环境,并明显更好地部署速度。
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先前的工作表明,深-RL可以应用于无地图导航,包括混合无人驾驶空中水下车辆(Huauvs)的中等过渡。本文介绍了基于最先进的演员批评算法的新方法,以解决Huauv的导航和中型过渡问题。我们表明,具有复发性神经网络的双重评论家Deep-RL可以使用仅范围数据和相对定位来改善Huauvs的导航性能。我们的深-RL方法通过通过不同的模拟场景对学习的扎实概括,实现了更好的导航和过渡能力,表现优于先前的方法。
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深钢筋学习中的确定性和随机技术已成为改善运动控制和各种机器人的决策任务的有前途的解决方案。先前的工作表明,这些深-RL算法通常可以应用于一般的移动机器人的无MAP导航。但是,他们倾向于使用简单的传感策略,因为已经证明它们在高维状态空间(例如基于图像的传感的空间)方面的性能不佳。本文在执行移动机器人无地图导航的任务时,对两种深-RL技术 - 深确定性政策梯度(DDPG)和软参与者(SAC)进行了比较分析。我们的目标是通过展示神经网络体系结构如何影响学习本身的贡献,并根据每种方法的航空移动机器人导航的时间和距离提出定量结果。总体而言,我们对六个不同体系结构的分析强调了随机方法(SAC)更好地使用更深的体系结构,而恰恰相反发生在确定性方法(DDPG)中。
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强化学习(RL)通过原始像素成像和连续的控制任务在视频游戏中表现出了令人印象深刻的表现。但是,RL的性能较差,例如原始像素图像,例如原始像素图像。人们普遍认为,基于物理状态的RL策略(例如激光传感器测量值)比像素学习相比会产生更有效的样品结果。这项工作提出了一种新方法,该方法从深度地图估算中提取信息,以教授RL代理以执行无人机导航(UAV)的无地图导航。我们提出了深度模仿的对比度无监督的优先表示(DEPTH-CUPRL),该表示具有优先重播记忆的估算图像的深度。我们使用RL和对比度学习的组合,根据图像的RL问题引发。从无人驾驶汽车(UAV)对结果的分析中,可以得出结论,我们的深度cuprl方法在无MAP导航能力中对决策和优于最先进的像素的方法有效。
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Selecting the number of topics in LDA models is considered to be a difficult task, for which alternative approaches have been proposed. The performance of the recently developed singular Bayesian information criterion (sBIC) is evaluated and compared to the performance of alternative model selection criteria. The sBIC is a generalization of the standard BIC that can be implemented to singular statistical models. The comparison is based on Monte Carlo simulations and carried out for several alternative settings, varying with respect to the number of topics, the number of documents and the size of documents in the corpora. Performance is measured using different criteria which take into account the correct number of topics, but also whether the relevant topics from the DGPs are identified. Practical recommendations for LDA model selection in applications are derived.
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This work presents a set of neural network (NN) models specifically designed for accurate and efficient fluid dynamics forecasting. In this work, we show how neural networks training can be improved by reducing data complexity through a modal decomposition technique called higher order dynamic mode decomposition (HODMD), which identifies the main structures inside flow dynamics and reconstructs the original flow using only these main structures. This reconstruction has the same number of samples and spatial dimension as the original flow, but with a less complex dynamics and preserving its main features. We also show the low computational cost required by the proposed NN models, both in their training and inference phases. The core idea of this work is to test the limits of applicability of deep learning models to data forecasting in complex fluid dynamics problems. Generalization capabilities of the models are demonstrated by using the same neural network architectures to forecast the future dynamics of four different multi-phase flows. Data sets used to train and test these deep learning models come from Direct Numerical Simulations (DNS) of these flows.
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Applying deep learning concepts from image detection and graph theory has greatly advanced protein-ligand binding affinity prediction, a challenge with enormous ramifications for both drug discovery and protein engineering. We build upon these advances by designing a novel deep learning architecture consisting of a 3-dimensional convolutional neural network utilizing channel-wise attention and two graph convolutional networks utilizing attention-based aggregation of node features. HAC-Net (Hybrid Attention-Based Convolutional Neural Network) obtains state-of-the-art results on the PDBbind v.2016 core set, the most widely recognized benchmark in the field. We extensively assess the generalizability of our model using multiple train-test splits, each of which maximizes differences between either protein structures, protein sequences, or ligand extended-connectivity fingerprints. Furthermore, we perform 10-fold cross-validation with a similarity cutoff between SMILES strings of ligands in the training and test sets, and also evaluate the performance of HAC-Net on lower-quality data. We envision that this model can be extended to a broad range of supervised learning problems related to structure-based biomolecular property prediction. All of our software is available as open source at https://github.com/gregory-kyro/HAC-Net/.
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The field of robotics, and more especially humanoid robotics, has several established competitions with research oriented goals in mind. Challenging the robots in a handful of tasks, these competitions provide a way to gauge the state of the art in robotic design, as well as an indicator for how far we are from reaching human performance. The most notable competitions are RoboCup, which has the long-term goal of competing against a real human team in 2050, and the FIRA HuroCup league, in which humanoid robots have to perform tasks based on actual Olympic events. Having robots compete against humans under the same rules is a challenging goal, and, we believe that it is in the sport of archery that humanoid robots have the most potential to achieve it in the near future. In this work, we perform a first step in this direction. We present a humanoid robot that is capable of gripping, drawing and shooting a recurve bow at a target 10 meters away with considerable accuracy. Additionally, we show that it is also capable of shooting distances of over 50 meters.
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