尽管在最近的研究中,冷水珊瑚的分布模式(例如paragorgia achorea)受到了越来越多的关注,但对它们的原位活性模式知之甚少。在本文中,我们使用机器学习技术检查了灰木杆菌中的息肉活动,以分析从挪威Stjernsund部署的自主登录机群集获得的高分辨率时间序列数据和照片。本文得出的模型的互动说明是作为补充材料提供的。我们发现,珊瑚息肉扩展程度的最佳预测指标是当前方向,滞后为三个小时。与水流无直接相关的其他变量(例如温度和盐度)提供了更少的有关息肉活动的信息。有趣的是,可以通过对测量位点上方的水柱中的层流进行采样,而不是通过对珊瑚的直接流中的更湍流流进行采样。我们的结果表明,灰木息肉的活性模式受Stjernsund的强潮流状态的控制。看来,木托氏菌对环境当前状态的较短变化没有反应,而是根据潮汐周期本身的大规模模式来调整其行为,以优化营养的吸收。
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State-of-the-art performance in electroencephalography (EEG) decoding tasks is currently often achieved with either Deep-Learning or Riemannian-Geometry-based decoders. Recently, there is growing interest in Deep Riemannian Networks (DRNs) possibly combining the advantages of both previous classes of methods. However, there are still a range of topics where additional insight is needed to pave the way for a more widespread application of DRNs in EEG. These include architecture design questions such as network size and end-to-end ability as well as model training questions. How these factors affect model performance has not been explored. Additionally, it is not clear how the data within these networks is transformed, and whether this would correlate with traditional EEG decoding. Our study aims to lay the groundwork in the area of these topics through the analysis of DRNs for EEG with a wide range of hyperparameters. Networks were tested on two public EEG datasets and compared with state-of-the-art ConvNets. Here we propose end-to-end EEG SPDNet (EE(G)-SPDNet), and we show that this wide, end-to-end DRN can outperform the ConvNets, and in doing so use physiologically plausible frequency regions. We also show that the end-to-end approach learns more complex filters than traditional band-pass filters targeting the classical alpha, beta, and gamma frequency bands of the EEG, and that performance can benefit from channel specific filtering approaches. Additionally, architectural analysis revealed areas for further improvement due to the possible loss of Riemannian specific information throughout the network. Our study thus shows how to design and train DRNs to infer task-related information from the raw EEG without the need of handcrafted filterbanks and highlights the potential of end-to-end DRNs such as EE(G)-SPDNet for high-performance EEG decoding.
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State-of-the-art image and text classification models, such as Convectional Neural Networks and Transformers, have long been able to classify their respective unimodal reasoning satisfactorily with accuracy close to or exceeding human accuracy. However, images embedded with text, such as hateful memes, are hard to classify using unimodal reasoning when difficult examples, such as benign confounders, are incorporated into the data set. We attempt to generate more labeled memes in addition to the Hateful Memes data set from Facebook AI, based on the framework of a winning team from the Hateful Meme Challenge. To increase the number of labeled memes, we explore semi-supervised learning using pseudo-labels for newly introduced, unlabeled memes gathered from the Memotion Dataset 7K. We find that the semi-supervised learning task on unlabeled data required human intervention and filtering and that adding a limited amount of new data yields no extra classification performance.
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Powerful hardware services and software libraries are vital tools for quickly and affordably designing, testing, and executing quantum algorithms. A robust large-scale study of how the performance of these platforms scales with the number of qubits is key to providing quantum solutions to challenging industry problems. Such an evaluation is difficult owing to the availability and price of physical quantum processing units. This work benchmarks the runtime and accuracy for a representative sample of specialized high-performance simulated and physical quantum processing units. Results show the QMware cloud computing service can reduce the runtime for executing a quantum circuit by up to 78% compared to the next fastest option for algorithms with fewer than 27 qubits. The AWS SV1 simulator offers a runtime advantage for larger circuits, up to the maximum 34 qubits available with SV1. Beyond this limit, QMware provides the ability to execute circuits as large as 40 qubits. Physical quantum devices, such as Rigetti's Aspen-M2, can provide an exponential runtime advantage for circuits with more than 30. However, the high financial cost of physical quantum processing units presents a serious barrier to practical use. Moreover, of the four quantum devices tested, only IonQ's Harmony achieves high fidelity with more than four qubits. This study paves the way to understanding the optimal combination of available software and hardware for executing practical quantum algorithms.
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这项工作介绍了Seleseet,这是一种新的大型多标签土地覆盖物和土地使用场景的理解数据集。 It includes $1\,759\,830$ images from Sentinel-2 tiles, with 12 spectral bands and patch sizes of up to $ 120 \ \mathrm{px} \times 120 \ \mathrm{px}$.每张图像都带有来自德国土地覆盖型LBM-DE2018的大型像素级标签,其土地覆盖类别基于Corine Land Cover数据库(CLC)2018,而最小映射单元(MMU)的五倍比原始CLC映射小五倍。 。我们提供了所有四个季节的像素同步示例,以及额外的雪套装。这些属性使Seasonet成为当前最广泛,最大的遥感场景理解数据集,其应用程序从土地覆盖地图上的场景分类到基于内容的跨季节图像检索和自我审议的功能学习。我们通过评估场景分类和语义分割方案中新数据集中的最新深层网络来提供基线结果。
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理解神经动力学的空间和时间特征之间的相互作用可以有助于我们对人脑中信息处理的理解。图形神经网络(GNN)提供了一种新的可能性,可以解释图形结构化信号,如在复杂的大脑网络中观察到的那些。在我们的研究中,我们比较不同的时空GNN架构,并研究他们复制在功能MRI(FMRI)研究中获得的神经活动分布的能力。我们评估GNN模型在MRI研究中各种场景的性能,并将其与VAR模型进行比较,目前主要用于定向功能连接分析。我们表明,即使当可用数据稀缺时,基于基于解剖学基板的局部功能相互作用,基于GNN的方法也能够鲁棒地规模到大型网络研究。通过包括作为信息衬底的解剖连接以进行信息传播,这种GNN还提供了关于指向连接性分析的多模阶视角,提供了研究脑网络中的时空动态的新颖可能性。
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