deep learning models

  • 文章类型: Journal Article
    在撒哈拉以南非洲,急性发作的严重疟疾贫血(SMA)是一个关键的挑战,尤其影响五岁以下儿童。SMA中血细胞比容的急性下降被认为是由脾脏中吞噬的病理过程增加引起的。导致存在具有改变的形态学特征的不同的红细胞(RBC)。我们假设通过利用深度学习模型的能力,可以在外周血膜(PBF)中系统地大规模检测这些红细胞。显微镜对PBF的评估不能按比例进行此任务,并且会发生变化。这里我们介绍一个深度学习模型,利用弱监督多实例学习框架,通过形态学改变的红细胞的存在来识别SMA(MILISMA)。MILISMA的分类准确率为83%(曲线下的接受者工作特征面积[AUC]为87%;精确召回AUC为76%)。更重要的是,MILISMA的能力扩展到识别红细胞描述符中具有统计学意义的形态学差异(p<0.01)。视觉分析丰富了我们的发现,这强调了与非SMA细胞相比,受SMA影响的红细胞的独特形态特征。该模型辅助RBC改变的检测和表征可以增强对SMA病理学的理解,并细化SMA诊断和预后评估过程。
    In sub-Saharan Africa, acute-onset severe malaria anaemia (SMA) is a critical challenge, particularly affecting children under five. The acute drop in haematocrit in SMA is thought to be driven by an increased phagocytotic pathological process in the spleen, leading to the presence of distinct red blood cells (RBCs) with altered morphological characteristics. We hypothesized that these RBCs could be detected systematically and at scale in peripheral blood films (PBFs) by harnessing the capabilities of deep learning models. Assessment of PBFs by a microscopist does not scale for this task and is subject to variability. Here we introduce a deep learning model, leveraging a weakly supervised Multiple Instance Learning framework, to Identify SMA (MILISMA) through the presence of morphologically changed RBCs. MILISMA achieved a classification accuracy of 83% (receiver operating characteristic area under the curve [AUC] of 87%; precision-recall AUC of 76%). More importantly, MILISMA\'s capabilities extend to identifying statistically significant morphological distinctions (p < 0.01) in RBCs descriptors. Our findings are enriched by visual analyses, which underscore the unique morphological features of SMA-affected RBCs when compared to non-SMA cells. This model aided detection and characterization of RBC alterations could enhance the understanding of SMA\'s pathology and refine SMA diagnostic and prognostic evaluation processes at scale.
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  • 文章类型: Journal Article
    这项研究概述了一种使用监控摄像头的方法和一种算法,该算法调用深度学习模型来生成以小流鲑鱼和鳟鱼为特征的视频片段。这种自动化过程大大减少了视频监控中人为干预的需求。此外,提供了有关设置和配置监视设备的全面指南,以及有关培训适合特定需求的深度学习模型的说明。访问有关深度学习模型的视频数据和知识使对鳟鱼和鲑鱼的监控变得动态和动手,因为收集的数据可用于训练和进一步改进深度学习模型。希望,这种设置将鼓励渔业管理人员进行更多的监测,因为与定制的鱼类监测解决方案相比,设备相对便宜。为了有效利用数据,相机捕获的鱼的自然标记可用于个人识别。虽然自动化过程大大减少了视频监控中人为干预的需求,并加快了鱼类的初始分类和检测速度,基于自然标记的人工识别单个鱼类仍然需要人工的努力和参与。个人遭遇数据拥有许多潜在的应用,如捕获-再捕获和相对丰度模型,并通过空间捕获来评估水力发电中的鱼类通道,也就是说,在不同位置识别的同一个人。使用这种技术可以获得很多收益,因为相机捕获是鱼的福利的更好选择,并且与物理捕获和标记相比耗时更少。
    This study outlines a method for using surveillance cameras and an algorithm that calls a deep learning model to generate video segments featuring salmon and trout in small streams. This automated process greatly reduces the need for human intervention in video surveillance. Furthermore, a comprehensive guide is provided on setting up and configuring surveillance equipment, along with instructions on training a deep learning model tailored to specific requirements. Access to video data and knowledge about deep learning models makes monitoring of trout and salmon dynamic and hands-on, as the collected data can be used to train and further improve deep learning models. Hopefully, this setup will encourage fisheries managers to conduct more monitoring as the equipment is relatively cheap compared with customized solutions for fish monitoring. To make effective use of the data, natural markings of the camera-captured fish can be used for individual identification. While the automated process greatly reduces the need for human intervention in video surveillance and speeds up the initial sorting and detection of fish, the manual identification of individual fish based on natural markings still requires human effort and involvement. Individual encounter data hold many potential applications, such as capture-recapture and relative abundance models, and for evaluating fish passages in streams with hydropower by spatial recaptures, that is, the same individual identified at different locations. There is much to gain by using this technique as camera captures are the better option for the fish\'s welfare and are less time-consuming compared with physical captures and tagging.
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  • 文章类型: Journal Article
    蛋白质结构测定在深度学习模型的帮助下取得了进展,能够从蛋白质序列中预测蛋白质折叠。然而,在蛋白质结构仍未描述的某些情况下,获得准确的预测变得至关重要。这在处理稀有时尤其具有挑战性,多样的结构和复杂的样品制备。不同的指标评估预测可靠性,并提供对结果强度的洞察,通过结合不同的模型,提供对蛋白质结构的全面了解。在之前的研究中,研究了两种名为ARM58和ARM56的蛋白质。这些蛋白质包含四个功能未知的结构域,存在于利什曼原虫中。ARM是指抗锑标记物。这项研究的主要目的是评估模型预测的准确性,从而提供对这些发现背后的复杂性和支持指标的见解。该分析还扩展到从其他物种和生物体获得的预测的比较。值得注意的是,这些蛋白质中的一种与克氏锥虫和布鲁氏锥虫具有直系同源物,对我们的分析有进一步的意义。这一尝试强调了评估深度学习模型的不同输出的重要性。促进不同生物体和蛋白质之间的比较。这在没有先前结构信息可用的情况下变得特别相关。
    Protein structure determination has made progress with the aid of deep learning models, enabling the prediction of protein folding from protein sequences. However, obtaining accurate predictions becomes essential in certain cases where the protein structure remains undescribed. This is particularly challenging when dealing with rare, diverse structures and complex sample preparation. Different metrics assess prediction reliability and offer insights into result strength, providing a comprehensive understanding of protein structure by combining different models. In a previous study, two proteins named ARM58 and ARM56 were investigated. These proteins contain four domains of unknown function and are present in Leishmania spp. ARM refers to an antimony resistance marker. The study\'s main objective is to assess the accuracy of the model\'s predictions, thereby providing insights into the complexities and supporting metrics underlying these findings. The analysis also extends to the comparison of predictions obtained from other species and organisms. Notably, one of these proteins shares an ortholog with Trypanosoma cruzi and Trypanosoma brucei, leading further significance to our analysis. This attempt underscored the importance of evaluating the diverse outputs from deep learning models, facilitating comparisons across different organisms and proteins. This becomes particularly pertinent in cases where no previous structural information is available.
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  • 文章类型: Journal Article
    多重压力暴露下茶叶生产的主要挑战对其全球市场可持续性产生了负面影响。因此,引入一种内场快速技术来监测茶叶的压力具有巨大的迫切需求。因此,这项研究旨在提出一种基于具有深度学习模型的便携式智能手机检测压力症状的有效方法。首先,开发了一个数据库,其中包含10,000多个复杂自然场景中的茶园树冠图像,其中包括健康(无压力)和三种类型的压力(茶炭疽病(TA),茶泡枯萎病(TB)和晒伤(SB))。然后,YOLOv5m和YOLOv8m算法适用于区分四种类型的压力症状;其中YOLOv8m算法在识别健康叶子方面取得了更好的性能(98%),TA(92.0%),TB(68.4%)和SB(75.5%)。此外,YOLOv8m算法用于构建TA疾病严重程度的鉴别模型,并取得了满意的结果,中度,严重的TA感染占94%,96%,91%,分别。此外,我们发现YOLOv8m的CNN内核可以有效地提取第2层图像的纹理特征,并且这些特征可以清楚地区分不同类型的压力症状。这对YOLOv8m模型实现四类应激症状的高精度区分做出了巨大贡献。总之,我们的研究提供了一个有效的系统来实现低成本,高精度,快,基于智能手机和深度学习算法的复杂自然场景下茶应激症状的现场诊断。
    The primary challenges in tea production under multiple stress exposures have negatively affected its global market sustainability, so introducing an infield fast technique for monitoring tea leaves\' stresses has tremendous urgent needs. Therefore, this study aimed to propose an efficient method for the detection of stress symptoms based on a portable smartphone with deep learning models. Firstly, a database containing over 10,000 images of tea garden canopies in complex natural scenes was developed, which included healthy (no stress) and three types of stress (tea anthracnose (TA), tea blister blight (TB) and sunburn (SB)). Then, YOLOv5m and YOLOv8m algorithms were adapted to discriminate the four types of stress symptoms; where the YOLOv8m algorithm achieved better performance in the identification of healthy leaves (98%), TA (92.0%), TB (68.4%) and SB (75.5%). Furthermore, the YOLOv8m algorithm was used to construct a model for differentiation of disease severity of TA, and a satisfactory result was obtained with the accuracy of mild, moderate, and severe TA infections were 94%, 96%, and 91%, respectively. Besides, we found that CNN kernels of YOLOv8m could efficiently extract the texture characteristics of the images at layer 2, and these characteristics can clearly distinguish different types of stress symptoms. This makes great contributions to the YOLOv8m model to achieve high-precision differentiation of four types of stress symptoms. In conclusion, our study provided an effective system to achieve low-cost, high-precision, fast, and infield diagnosis of tea stress symptoms in complex natural scenes based on smartphone and deep learning algorithms.
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  • 文章类型: Journal Article
    这项研究通过深入的分子对接分析,探讨了基于生育酚的纳米乳液作为心血管疾病(CVD)治疗剂的潜力。该研究的重点是阐明生育酚与七个关键蛋白之间的分子相互作用(1O8a,4YAY,4DLI,1HW9,2YCW,1BO9和1CX2)在CVD发展中起关键作用。通过严格的硅对接调查,对具有约束力的亲和力进行了评估,生育酚与这些靶蛋白的抑制潜力和相互作用模式。这些发现揭示了重要的相互作用,特别是4YAY,显示-6.39kcal/mol的稳健结合能和20.84μM的有希望的Ki值。还观察到与1HW9,4DLI,2YCW和1CX2,进一步表明生育酚的潜在治疗相关性。相比之下,没有观察到与1BO9的相互作用。此外,对与生育酚结合的4YAY的常见残基进行了检查,突出了有助于相互作用稳定性的关键分子间疏水键。生育酚符合药代动力学(Lipinski's和Veber's)的口服生物利用度规则,并证明安全无毒和非致癌。因此,利用基于深度学习的蛋白质语言模型ESM1-b和ProtT5进行输入编码,以预测4YAY蛋白质和生育酚之间的相互作用位点。因此,对这些关键的蛋白质-配体相互作用进行了高度准确的预测。这项研究不仅促进了对这些相互作用的理解,而且突出了深度学习在分子生物学和药物发现方面的巨大潜力。它强调了生育酚作为心血管疾病管理候选人的承诺,揭示其分子相互作用和与生物分子样特征的相容性。
    This research delves into the exploration of the potential of tocopherol-based nanoemulsion as a therapeutic agent for cardiovascular diseases (CVD) through an in-depth molecular docking analysis. The study focuses on elucidating the molecular interactions between tocopherol and seven key proteins (1O8a, 4YAY, 4DLI, 1HW9, 2YCW, 1BO9 and 1CX2) that play pivotal roles in CVD development. Through rigorous in silico docking investigations, assessment was conducted on the binding affinities, inhibitory potentials and interaction patterns of tocopherol with these target proteins. The findings revealed significant interactions, particularly with 4YAY, displaying a robust binding energy of -6.39 kcal/mol and a promising Ki value of 20.84 μM. Notable interactions were also observed with 1HW9, 4DLI, 2YCW and 1CX2, further indicating tocopherol\'s potential therapeutic relevance. In contrast, no interaction was observed with 1BO9. Furthermore, an examination of the common residues of 4YAY bound to tocopherol was carried out, highlighting key intermolecular hydrophobic bonds that contribute to the interaction\'s stability. Tocopherol complies with pharmacokinetics (Lipinski\'s and Veber\'s) rules for oral bioavailability and proves safety non-toxic and non-carcinogenic. Thus, deep learning-based protein language models ESM1-b and ProtT5 were leveraged for input encodings to predict interaction sites between the 4YAY protein and tocopherol. Hence, highly accurate predictions of these critical protein-ligand interactions were achieved. This study not only advances the understanding of these interactions but also highlights deep learning\'s immense potential in molecular biology and drug discovery. It underscores tocopherol\'s promise as a cardiovascular disease management candidate, shedding light on its molecular interactions and compatibility with biomolecule-like characteristics.
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  • 文章类型: Journal Article
    临床决策支持系统(CDSS)是当代医疗保健中必不可少的工具,提高临床医生的决策和患者的预后。人工智能(AI)的集成现在正在进一步彻底改变CDSS。这篇综述深入探讨了人工智能技术转变CDSS,它们在医疗保健决策中的应用,相关挑战,以及充分发挥AI-CDSS潜力的潜在轨迹。审查首先为CDSS的定义及其在医疗保健领域的功能奠定了基础。然后强调了人工智能在提高CDSS有效性和效率方面发挥的日益重要的作用,强调其在塑造医疗保健实践方面不断发展的突出地位。它研究了将AI技术集成到CDSS中,包括神经网络和决策树等机器学习算法,自然语言处理,和深度学习。它还解决了与AI集成相关的挑战,比如可解释性和偏见。然后,我们转向CDSS中的AI应用程序,通过人工智能驱动诊断的真实例子,个性化治疗建议,风险预测,早期干预,和AI辅助的临床文档。该评论强调在AI-CDSS集成中以用户为中心的设计,解决可用性,信任,工作流,以及道德和法律方面的考虑。它承认普遍存在的障碍,并提出了成功采用AI-CDSS的策略,强调工作流程调整和跨学科协作的必要性。审查最后总结了主要发现,强调AI在CDSS中的变革潜力,并倡导继续研究和创新。它强调需要共同努力,以实现未来的AI驱动的CDSS优化医疗保健服务并改善患者预后。
    Clinical Decision Support Systems (CDSS) are essential tools in contemporary healthcare, enhancing clinicians\' decisions and patient outcomes. The integration of artificial intelligence (AI) is now revolutionizing CDSS even further. This review delves into AI technologies transforming CDSS, their applications in healthcare decision-making, associated challenges, and the potential trajectory toward fully realizing AI-CDSS\'s potential. The review begins by laying the groundwork with a definition of CDSS and its function within the healthcare field. It then highlights the increasingly significant role that AI is playing in enhancing CDSS effectiveness and efficiency, underlining its evolving prominence in shaping healthcare practices. It examines the integration of AI technologies into CDSS, including machine learning algorithms like neural networks and decision trees, natural language processing, and deep learning. It also addresses the challenges associated with AI integration, such as interpretability and bias. We then shift to AI applications within CDSS, with real-life examples of AI-driven diagnostics, personalized treatment recommendations, risk prediction, early intervention, and AI-assisted clinical documentation. The review emphasizes user-centered design in AI-CDSS integration, addressing usability, trust, workflow, and ethical and legal considerations. It acknowledges prevailing obstacles and suggests strategies for successful AI-CDSS adoption, highlighting the need for workflow alignment and interdisciplinary collaboration. The review concludes by summarizing key findings, underscoring AI\'s transformative potential in CDSS, and advocating for continued research and innovation. It emphasizes the need for collaborative efforts to realize a future where AI-powered CDSS optimizes healthcare delivery and improves patient outcomes.
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  • 文章类型: Journal Article
    背景:5-羟色胺能系统通过功能上不同的具有异质性的神经元亚群调节大脑过程,包括他们的电生理活动。在细胞外记录中,要研究其功能特性的血清素能神经元通常根据其活动的“典型”特征进行鉴定,即缓慢的定期发射和相对较长的动作电位持续时间。因此,由于缺乏同样强大的标准来区分具有“非典型”特征的血清素能神经元与非血清素能细胞,血清素能神经元活动多样性的生理相关性在很大程度上未得到研究。
    方法:我们提出了深度学习模型,能够以高精度区分典型和非典型的血清素能神经元与非血清素能细胞。该研究利用了通过对5-羟色胺能系统和非5-羟色胺能细胞特异的荧光蛋白的表达鉴定的5-羟色胺能神经元的电生理体外记录。这些录音构成了训练的基础,验证,和深度学习模型的测试数据。这项研究采用了卷积神经网络(CNN),以模式识别的效率而闻名,根据其动作电位的具体特征对神经元进行分类。
    结果:在包含27,108个原始动作电位样本的数据集上训练模型,除了大量的1200万个合成动作电位样本,旨在减轻录音中背景噪声过度拟合的风险,潜在的偏见来源。结果表明,该模型具有较高的准确性,并在“非均匀”数据上得到了进一步验证,即,模型未知的数据,并且在与用于训练模型的日期不同的日期收集,以确认它们在现实实验条件下的鲁棒性和可靠性。
    方法:用于鉴定5-羟色胺能神经元的常规方法允许识别定义为典型的5-羟色胺能神经元。我们的模型基于对唯一动作电位的分析,可靠地识别了超过94%的5-羟色胺能神经元,包括具有尖峰和活动非典型特征的神经元。
    结论:该模型已准备好用于使用此处描述的记录参数进行的实验。我们发布了代码和程序,可以使模型适应不同的采集参数或识别其他类型的自发活动神经元。
    BACKGROUND: The serotonergic system modulates brain processes via functionally distinct subpopulations of neurons with heterogeneous properties, including their electrophysiological activity. In extracellular recordings, serotonergic neurons to be investigated for their functional properties are commonly identified on the basis of \"typical\" features of their activity, i.e. slow regular firing and relatively long duration of action potentials. Thus, due to the lack of equally robust criteria for discriminating serotonergic neurons with \"atypical\" features from non-serotonergic cells, the physiological relevance of the diversity of serotonergic neuron activities results largely understudied.
    METHODS: We propose deep learning models capable of discriminating typical and atypical serotonergic neurons from non-serotonergic cells with high accuracy. The research utilized electrophysiological in vitro recordings from serotonergic neurons identified by the expression of fluorescent proteins specific to the serotonergic system and non-serotonergic cells. These recordings formed the basis of the training, validation, and testing data for the deep learning models. The study employed convolutional neural networks (CNNs), known for their efficiency in pattern recognition, to classify neurons based on the specific characteristics of their action potentials.
    RESULTS: The models were trained on a dataset comprising 27,108 original action potential samples, alongside an extensive set of 12 million synthetic action potential samples, designed to mitigate the risk of overfitting the background noise in the recordings, a potential source of bias. Results show that the models achieved high accuracy and were further validated on \"non-homogeneous\" data, i.e., data unknown to the model and collected on different days from those used for the training of the model, to confirm their robustness and reliability in real-world experimental conditions.
    METHODS: Conventional methods for identifying serotonergic neurons allow recognition of serotonergic neurons defined as typical. Our model based on the analysis of the sole action potential reliably recognizes over 94% of serotonergic neurons including those with atypical features of spike and activity.
    CONCLUSIONS: The model is ready for use in experiments conducted with the here described recording parameters. We release the codes and procedures allowing to adapt the model to different acquisition parameters or for identification of other classes of spontaneously active neurons.
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  • 文章类型: Journal Article
    确保化合物的安全性和有效性在小分子药物开发中至关重要。在药物开发的后期,有毒化合物构成了重大挑战,失去宝贵的资源和时间。使用深度学习模型对化合物毒性的早期和准确预测提供了一种有前途的解决方案,可以在药物发现期间减轻这些风险。在这项研究中,我们介绍了几种旨在评估不同类型化合物毒性的深度学习模型的发展,包括急性毒性,致癌性,hERG_心脏毒性(人类ether-a-go-go相关基因引起的心脏毒性),肝毒性,和诱变性。为了解决数据大小的固有变化,标签类型,以及在不同类型的毒性中的分布,我们采用了不同的培训策略。我们的第一种方法涉及利用图卷积网络(GCN)回归模型来预测急性毒性,在腹膜内用PearsonR0.76、0.74和0.65取得了显著的性能,静脉注射,和口服给药途径,分别。此外,我们训练了多个GCN二元分类模型,每种都适合特定类型的毒性。这些模型表现出很高的曲线下面积(AUC)得分,预测致癌性的AUC为0.69、0.77、0.88和0.79,hERG_心脏毒性,致突变性,和肝毒性,分别。此外,我们使用批准的药物数据集来确定模型使用预测评分的适当阈值.我们将这些模型整合到虚拟筛选管道中,以评估其在识别潜在低毒候选药物方面的有效性。我们的研究结果表明,这种深度学习方法有可能通过加快选择低毒性化合物来显著降低与药物开发相关的成本和风险。因此,本研究开发的模型有望成为早期候选药物筛选和选择的关键工具.
    Ensuring the safety and efficacy of chemical compounds is crucial in small-molecule drug development. In the later stages of drug development, toxic compounds pose a significant challenge, losing valuable resources and time. Early and accurate prediction of compound toxicity using deep learning models offers a promising solution to mitigate these risks during drug discovery. In this study, we present the development of several deep-learning models aimed at evaluating different types of compound toxicity, including acute toxicity, carcinogenicity, hERG_cardiotoxicity (the human ether-a-go-go related gene caused cardiotoxicity), hepatotoxicity, and mutagenicity. To address the inherent variations in data size, label type, and distribution across different types of toxicity, we employed diverse training strategies. Our first approach involved utilizing a graph convolutional network (GCN) regression model to predict acute toxicity, which achieved notable performance with Pearson R 0.76, 0.74, and 0.65 for intraperitoneal, intravenous, and oral administration routes, respectively. Furthermore, we trained multiple GCN binary classification models, each tailored to a specific type of toxicity. These models exhibited high area under the curve (AUC) scores, with an impressive AUC of 0.69, 0.77, 0.88, and 0.79 for predicting carcinogenicity, hERG_cardiotoxicity, mutagenicity, and hepatotoxicity, respectively. Additionally, we have used the approved drug dataset to determine the appropriate threshold value for the prediction score in model usage. We integrated these models into a virtual screening pipeline to assess their effectiveness in identifying potential low-toxicity drug candidates. Our findings indicate that this deep learning approach has the potential to significantly reduce the cost and risk associated with drug development by expediting the selection of compounds with low toxicity profiles. Therefore, the models developed in this study hold promise as critical tools for early drug candidate screening and selection.
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  • 文章类型: Journal Article
    预测河流系统中的悬浮泥沙负荷(SSL)对于理解流域的水文学至关重要。因此,我们研究的新颖性是开发一种基于深度学习(DL)和Shapley加法迁移(SHAP)解释技术的可解释(可解释)模型,用于预测河流系统中的SSL。本文研究了四种DL模型的能力,包括密集深度神经网络(DDNN),长短期记忆(LSTM),门控经常性单位(GRU),和简单的递归神经网络(RNN)模型,用于使用Taleghan河流域每日时间尺度的河流流量和降雨数据预测每日SSL,德黑兰西北部,伊朗。通过使用几个定量和图形标准来评估模型的性能。还研究了参数设置对深度模型在SSL预测上的性能的影响。最优优化算法,最大迭代(MI),并获得批量大小(BC)用于对每日SSL进行建模,和模型结构对预测的影响显著。模型预测精度的比较表明,DDNN(R2=0.96,RMSE=333.46)优于LSTM(R2=0.75,RMSE=786.20),GRU(R2=0.73,RMSE=825.67),和简单的RNN(R2=0.78,RMSE=741.45)。此外,泰勒图证实了DDNN在其他型号中具有最高的性能。解释技术可以解决模型的黑箱性质,在这里,SHAP用于开发可解释的DL模型,以解释DL模型的输出。SHAP的结果表明,在估算SSL时,河流流量对模型的输出影响最大。总的来说,我们得出结论,DL模型在流域预测SSL方面具有很大的潜力。因此,在未来的研究中,建议使用不同的解释技术作为解释DL模型输出的工具(DL模型作为黑箱模型)。
    The prediction of suspended sediment load (SSL) within riverine systems is critical to understanding the watershed\'s hydrology. Therefore, the novelty of our research is developing an interpretable (explainable) model based on deep learning (DL) and Shapley Additive ExPlanations (SHAP) interpretation technique for prediction of SSL in the riverine systems. This paper investigates the abilities of four DL models, including dense deep neural networks (DDNN), long short-term memory (LSTM), gated recurrent unit (GRU), and simple recurrent neural network (RNN) models for the prediction of daily SSL using river discharge and rainfall data at a daily time scale in the Taleghan River watershed, northwestern Tehran, Iran. The performance of models was evaluated by using several quantitative and graphical criteria. The effect of parameter settings on the performance of deep models on SSL prediction was also investigated. The optimal optimization algorithms, maximum iteration (MI), and batch size (BC) were obtained for modeling daily SSL, and structure of the model impact on prediction remarkably. The comparison of prediction accuracy of the models illustrated that DDNN (with R2 = 0.96, RMSE = 333.46) outperformed LSTM (R2 = 0.75, RMSE = 786.20), GRU (R2 = 0.73, RMSE = 825.67), and simple RNN (R2 = 0.78, RMSE = 741.45). Furthermore, the Taylor diagram confirmed that DDNN has the highest performance among other models. Interpretation techniques can address the black-box nature of models, and here, SHAP was applied to develop an interpretable DL model to interpret of DL model\'s output. The results of SHAP showed that river discharge has the strongest impact on the model\'s output in estimating SSL. Overall, we conclude that DL models have great potential in watersheds to predict SSL. Therefore, different interpretation techniques as tools to interpret DL model\'s output (DL model is as black-box model) are recommended in future research.
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  • 文章类型: Journal Article
    老年人跌倒是一个主要的威胁,每年导致150-200万老年人遭受严重伤害和100万人死亡。老年人遭受的跌倒可能会对他们的身心健康状况产生长期的负面影响。最近,主要的医疗保健研究集中在这一点上,以检测和防止跌倒。在这项工作中,设计并开发了一种基于人工智能(AI)边缘计算的可穿戴设备,用于检测和预防老年人跌倒。Further,各种深度学习算法,如卷积神经网络(CNN),循环神经网络(RNN)长短期记忆(LSTM)门控递归单元(GRU)用于老年人的活动识别。此外,CNN-LSTM,分别利用具有和不具有关注层的RNN-LSTM和GRU-LSTM,并分析性能指标以找到最佳的深度学习模型。此外,三个不同的硬件板,如JetsonNano开发板,树莓PI3和4被用作AI边缘计算设备,并实现了最佳的深度学习模型并评估了计算时间。结果表明,具有注意层的CNN-LSTM具有准确性,召回,精度和F1分数为97%,98%,98%和0.98,与其他深度学习模型相比更好。此外,与其他边缘计算设备相比,NVIDIAJetsonNano的计算时间更短。这项工作似乎具有很高的社会相关性,因为所提出的可穿戴设备可以用于监测老年人的活动并防止老年人跌倒,从而改善老年人的生活质量。
    Elderly falls are a major concerning threat resulting in over 1.5-2 million elderly people experiencing severe injuries and 1 million deaths yearly. Falls experienced by Elderly people may lead to a long-term negative impact on their physical and psychological health conditions. Major healthcare research had focused on this lately to detect and prevent the fall. In this work, an Artificial Intelligence (AI) edge computing based wearable device is designed and developed for detection and prevention of fall of elderly people. Further, the various deep learning algorithms such as Convolutional Neural Network (CNN), Recurrent Neural Network (RNN), Long Short-Term Memory (LSTM), Gated Recurrent Unit (GRU) are utilized for activity recognition of elderly. Also, the CNN-LSTM, RNN-LSTM and GRU-LSTM with and without attention layer respectively are utilized and the performance metrics are analyzed to find the best deep learning model. Furthermore, the three different hardware boards such as Jetson Nano developer board, Raspberry PI 3 and 4 are utilized as an AI edge computing device and the best deep learning model is implemented and the computation time is evaluated. Results demonstrate that the CNN-LSTM with attention layer exhibits the accuracy, recall, precision and F1_Score of 97%, 98%, 98% and 0.98 respectively which is better when compared to other deep learning models. Also, the computation time of NVIDIA Jetson Nano is less when compared to other edge computing devices. This work appears to be of high societal relevance since the proposed wearable device can be used to monitor the activity of elderly and prevents the elderly falls which improve the quality of life of elderly people.
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