User-specific future activity prediction in the healthcare domain based on previous activities can drastically improve the services provided by the nurses. It is challenging because, unlike other domains, activities in healthcare involve both nurses and patients, and they also vary from hour to hour. In this paper, we employ various data processing techniques to organize and modify the data structure and an LSTM-based multi-label classifier for a novel 2-stage training approach (user-agnostic pre-training and user-specific fine-tuning). Our experiment achieves a validation accuracy of 31.58\%, precision 57.94%, recall 68.31%, and F1 score 60.38%. We concluded that proper data pre-processing and a 2-stage training process resulted in better performance. This experiment is a part of the "Fourth Nurse Care Activity Recognition Challenge" by our team "Not A Fan of Local Minima".
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由于缺乏自动注释系统,大多数发展城市的城市机构都是数字未标记的。因此,在此类城市中,位置和轨迹服务(例如Google Maps,Uber等)仍然不足。自然场景图像中的准确招牌检测是从此类城市街道检索无错误的信息的最重要任务。然而,开发准确的招牌本地化系统仍然是尚未解决的挑战,因为它的外观包括文本图像和令人困惑的背景。我们提出了一种新型的对象检测方法,该方法可以自动检测招牌,适合此类城市。我们通过合并两种专业预处理方法和一种运行时效高参数值选择算法来使用更快的基于R-CNN的定位。我们采用了一种增量方法,通过使用我们构造的SVSO(Street View Signboard对象)签名板数据集,通过详细评估和与基线进行比较,以达到最终提出的方法,这些方法包含六个发展中国家的自然场景图像。我们在SVSO数据集和Open Image数据集上展示了我们提出的方法的最新性能。我们提出的方法可以准确地检测招牌(即使图像包含多种形状和颜色的多种嘈杂背景的招牌)在SVSO独立测试集上达到0.90 MAP(平均平均精度)得分。我们的实施可在以下网址获得:https://github.com/sadrultoaha/signboard-detection
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The latent space of autoencoders has been improved for clustering image data by jointly learning a t-distributed embedding with a clustering algorithm inspired by the neighborhood embedding concept proposed for data visualization. However, multivariate tabular data pose different challenges in representation learning than image data, where traditional machine learning is often superior to deep tabular data learning. In this paper, we address the challenges of learning tabular data in contrast to image data and present a novel Gaussian Cluster Embedding in Autoencoder Latent Space (G-CEALS) algorithm by replacing t-distributions with multivariate Gaussian clusters. Unlike current methods, the proposed approach independently defines the Gaussian embedding and the target cluster distribution to accommodate any clustering algorithm in representation learning. A trained G-CEALS model extracts a quality embedding for unseen test data. Based on the embedding clustering accuracy, the average rank of the proposed G-CEALS method is 1.4 (0.7), which is superior to all eight baseline clustering and cluster embedding methods on seven tabular data sets. This paper shows one of the first algorithms to jointly learn embedding and clustering to improve multivariate tabular data representation in downstream clustering.
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Deep learning methods in the literature are invariably benchmarked on image data sets and then assumed to work on all data problems. Unfortunately, architectures designed for image learning are often not ready or optimal for non-image data without considering data-specific learning requirements. In this paper, we take a data-centric view to argue that deep image embedding clustering methods are not equally effective on heterogeneous tabular data sets. This paper performs one of the first studies on deep embedding clustering of seven tabular data sets using six state-of-the-art baseline methods proposed for image data sets. Our results reveal that the traditional clustering of tabular data ranks second out of eight methods and is superior to most deep embedding clustering baselines. Our observation is in line with the recent literature that traditional machine learning of tabular data is still a competitive approach against deep learning. Although surprising to many deep learning researchers, traditional clustering methods can be competitive baselines for tabular data, and outperforming these baselines remains a challenge for deep embedding clustering. Therefore, deep learning methods for image learning may not be fair or suitable baselines for tabular data without considering data-specific contrasts and learning requirements.
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The task of out-of-distribution (OOD) detection is vital to realize safe and reliable operation for real-world applications. After the failure of likelihood-based detection in high dimensions had been shown, approaches based on the \emph{typical set} have been attracting attention; however, they still have not achieved satisfactory performance. Beginning by presenting the failure case of the typicality-based approach, we propose a new reconstruction error-based approach that employs normalizing flow (NF). We further introduce a typicality-based penalty, and by incorporating it into the reconstruction error in NF, we propose a new OOD detection method, penalized reconstruction error (PRE). Because the PRE detects test inputs that lie off the in-distribution manifold, it effectively detects adversarial examples as well as OOD examples. We show the effectiveness of our method through the evaluation using natural image datasets, CIFAR-10, TinyImageNet, and ILSVRC2012.
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Skeleton-based Motion Capture (MoCap) systems have been widely used in the game and film industry for mimicking complex human actions for a long time. MoCap data has also proved its effectiveness in human activity recognition tasks. However, it is a quite challenging task for smaller datasets. The lack of such data for industrial activities further adds to the difficulties. In this work, we have proposed an ensemble-based machine learning methodology that is targeted to work better on MoCap datasets. The experiments have been performed on the MoCap data given in the Bento Packaging Activity Recognition Challenge 2021. Bento is a Japanese word that resembles lunch-box. Upon processing the raw MoCap data at first, we have achieved an astonishing accuracy of 98% on 10-fold Cross-Validation and 82% on Leave-One-Out-Cross-Validation by using the proposed ensemble model.
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Context-sensitive two-point layer 5 pyramidal cells (L5PCs) were discovered as long ago as 1999. However, the potential of this discovery to provide useful neural computation has yet to be demonstrated. Here we show for the first time how a transformative L5PCs-driven deep neural network (DNN), termed the multisensory cooperative computing (MCC) architecture, can effectively process large amounts of heterogeneous real-world audio-visual (AV) data, using far less energy compared to best available 'point' neuron-driven DNNs. A novel highly-distributed parallel implementation on a Xilinx UltraScale+ MPSoC device estimates energy savings up to 245759 $ \times $ 50000 $\mu$J (i.e., 62% less than the baseline model in a semi-supervised learning setup) where a single synapse consumes $8e^{-5}\mu$J. In a supervised learning setup, the energy-saving can potentially reach up to 1250x less (per feedforward transmission) than the baseline model. The significantly reduced neural activity in MCC leads to inherently fast learning and resilience against sudden neural damage. This remarkable performance in pilot experiments demonstrates the embodied neuromorphic intelligence of our proposed cooperative L5PC that receives input from diverse neighbouring neurons as context to amplify the transmission of most salient and relevant information for onward transmission, from overwhelmingly large multimodal information utilised at the early stages of on-chip training. Our proposed approach opens new cross-disciplinary avenues for future on-chip DNN training implementations and posits a radical shift in current neuromorphic computing paradigms.
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许多水下任务,例如电缆和折磨检查,搜索和救援,受益于强大的人类机器人互动(HRI)功能。随着基于视觉的水下HRI方法的最新进展,即使在任务期间,自动驾驶水下车辆(AUV)也可以与他们的人类伴侣进行交流。但是,这些相互作用通常需要积极参与,尤其是人类(例如,在互动过程中必须继续看机器人)。因此,AUV必须知道何时开始与人类伴侣互动,即人是否关注AUV。在本文中,我们为AUV提供了一个潜水员的注意估计框架,以自主检测潜水员的注意力,然后(如果需要)在潜水员方面进行导航和重新定位以启动交互。该框架的核心要素是一个深神经网络(称为datt-net),它利用潜水员的10个面部关键点之间的几何关系来确定其头部方向。我们的基础实验评估(使用看不见的数据)表明,所提出的Datt-Net架构可以以有希望的准确性来确定人类潜水员的注意力。我们的现实世界实验还确认了Datt-NET的功效,该实验可以实时推理,并使AUV可以将自己定位为AUV-Diver相互作用。
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目标:探索深度学习算法进一步简化和优化尿道板(UP)质量评估的能力,使用板客观评分工具(POST),旨在提高Hypospadias修复中提高评估的客观性和可重复性。方法:五个关键的邮政地标是由专家在691图像数据集中的专家标记,该数据集接受了原发性杂质修复的青春期前男孩。然后,该数据集用于开发和验证基于深度学习的地标检测模型。提出的框架始于瞥见和检测,其中输入图像是使用预测的边界框裁剪的。接下来,使用深层卷积神经网络(CNN)体系结构来预测五个邮政标记的坐标。然后,这些预测的地标用于评估远端催化性远端的质量。结果:所提出的模型准确地定位了gan区域,平均平均精度(地图)为99.5%,总体灵敏度为99.1%。在预测地标的坐标时,达到了0.07152的归一化平均误差(NME),平均平方误差(MSE)为0.001,在0.1 nme的阈值下为20.2%的故障率。结论:此深度学习应用程序在使用邮政评估质量时表现出鲁棒性和高精度。使用国际多中心基于图像的数据库进行进一步评估。外部验证可以使深度学习算法受益,并导致更好的评估,决策和对手术结果的预测。
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作为世界上口语最广泛的语言之一,孟加拉国的使用在社交媒体世界中也在增加。讽刺是一种积极的陈述或言论,其基本的负面动机在当今的社交媒体平台中广泛使用。在过去的许多年中,英语的讽刺检测有了显着改善,但是有关孟加拉讽刺检测的情况仍然没有改变。结果,仍然很难识别孟加拉国中的讽刺,缺乏高质量的数据是主要因素。本文提出了Banglasarc,该数据集是专门为孟加拉文本数据讽刺检测的数据集。该数据集包含5112条评论/状态和从各种在线社交平台(例如Facebook,YouTube)以及一些在线博客中收集的内容。由于孟加拉语中分类评论的数据收集数量有限,因此该数据集将有助于确定讽刺的研究,认识到人们的情绪,检测到各种类型的孟加拉语表达式和其他领域。该数据集可在https://www.kaggle.com/datasets/sakibapon/banglasarc上公开获得。
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