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ROPRNet: Deep learning-assisted recurrence prediction for retinopathy of prematurity ROPRNet:深度学习辅助早产儿视网膜病变复发预测
IF 4.9 2区 医学 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2024-11-05 DOI: 10.1016/j.bspc.2024.107135
Peijie Huang , Yiying Xie , Rong Wu , Qiuxia Lin , Nian Cai , Haitao Chen , Songfu Feng
Retinopathy of Prematurity (ROP) recurrence is significant for the prognosis of ROP treatment. In this paper, corrected gestational age at treatment is involved as an important risk factor for the assessment of ROP recurrence. To reveal the complementary information from fundus images and risk factors, a dual-modal deep learning framework with two feature extraction streams, termed as ROPRNet, is designed to assist recurrence prediction of ROP after anti-vascular endothelial growth factor (Anti-VEGF) treatment, involving a stacked autoencoder (SAE) stream for risk factors and a cascaded deep network (CDN) stream for fundus images. Here, the specifically-designed CDN stream involves several novel modules to effectively capture subtle structural changes of retina in the fundus images, involving enhancement head (EH), enhanced ConvNeXt (EnConvNeXt) and multi-dimensional multi-scale feature fusion (MMFF). Specifically, EH is designed to suppress the variations of color and contrast in fundus images, which can highlight the informative features in the images. To comprehensively reveal the inherent medical hints submerged in the fundus images, an adaptive triple-branch attention (ATBA) and a special ConvNeXt with a rare-class sample generator (RSG) were designed to compose the EnConvNeXt for effectively extracting features from fundus images. The MMFF is designed for feature aggregation to mitigate redundant features from several fundus images from different shooting angles, involving a designed multi-dimensional and multi-sale attention (MD-MSA). The designed ROPRNet is validated on a real clinical dataset, which indicate that it is superior to several existing ROP diagnostic models, in terms of 0.894 AUC, 0.818 accuracy, 0.828 sensitivity and 0.800 specificity.
早产儿视网膜病变(ROP)复发对早产儿视网膜病变治疗的预后意义重大。本文将治疗时的矫正胎龄作为评估早产儿视网膜病变复发的一个重要风险因素。为了揭示眼底图像和风险因素的互补信息,我们设计了一种具有两个特征提取流的双模式深度学习框架(称为 ROPRNet),以帮助预测抗血管内皮生长因子(Anti-VEGF)治疗后 ROP 的复发,其中包括一个用于风险因素的堆叠自动编码器(SAE)流和一个用于眼底图像的级联深度网络(CDN)流。在这里,专门设计的 CDN 流涉及多个新型模块,以有效捕捉眼底图像中视网膜的细微结构变化,包括增强头(EH)、增强 ConvNeXt(EnConvNeXt)和多维多尺度特征融合(MMFF)。具体来说,EH 的设计目的是抑制眼底图像中颜色和对比度的变化,从而突出图像中的信息特征。为了全面揭示潜藏在眼底图像中的内在医学信息,设计了自适应三分支注意(ATBA)和带有稀有类样本生成器(RSG)的特殊 ConvNeXt 来组成 EnConvNeXt,以有效提取眼底图像中的特征。MMFF 设计用于特征聚合,以减少来自不同拍摄角度的多个眼底图像的冗余特征,其中涉及设计的多维和多销售关注(MD-MSA)。设计的 ROPRNet 在真实的临床数据集上进行了验证,结果表明它在 AUC 值 0.894、准确率 0.818、灵敏度 0.828 和特异性 0.800 方面优于现有的几个 ROP 诊断模型。
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引用次数: 0
Automated pericardium segmentation and epicardial adipose tissue quantification from computed tomography images 从计算机断层扫描图像自动分割心包和量化心外膜脂肪组织
IF 4.9 2区 医学 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2024-11-05 DOI: 10.1016/j.bspc.2024.107167
Ying Wang , Ankang Wang , Lu Wang , Wenjun Tan , Lisheng Xu , Jinsong Wang , Songang Li , Jinshuai Liu , Yu Sun , Benqiang Yang , Steve Greenwald

Background and Objective

Epicardial Adipose Tissue (EAT) is regarded as an independent risk factor for cardiovascular disease, and an increase in its volume is closely associated with disorders such as coronary artery atherosclerosis. Traditional manual and semi-automatic methods for EAT segmentation rely on subjective judgment, resulting in uncertainty and unreliability, which limits their application in clinical practice. Therefore, this study aims to develop a fully automatic segmentation and quantification method to improve the accuracy of EAT assessment.

Methods

A Boundary-Enhanced Multi-scale U-Net network with a Convolutional Transformer (BMT-UNet) is developed to segment the pericardium. The BMT-UNet comprises Boundary-Enhanced (BE) modules, Multi-Scale (MS) modules, and a Convolutional Transformer (ConvT) module. The MS and BE modules in the encoding part are designed to capture detailed boundary features and accurately delineate the pericardium boundary by combining multi-scale features with morphological operations, leveraging their complementarity. The ConvT module integrates global contextual information, thereby enhancing overall segmentation accuracy and addressing the issue of internal holes in the segmented pericardial images. The volume of EAT is automatically quantified using standard fat thresholds with a range of −190 to −30 HU.

Results

For a Coronary Computed Tomography Angiography (CCTA) dataset which contained 50 patients, the Dice coefficient and Hausdorff distance for the proposed method of pericardial and EAT segmentation are 98.3% ± 0.2%, 5.7±0.8 mm, and 93.9% ± 1.7%, 2.1 ± 0.3 mm, respectively. The linear regression coefficient between the EAT volume segmented and the actual volume is 0.982, and the Pearson correlation coefficient is 0.99. Bland-Altman analysis further confirmed the high consistency between the automated and manual methods. These results demonstrate a significant improvement over existing methods, particularly in terms of segmentation precision and reliability, which are critical for clinical application.

Conclusions

This work develops an automated method for quantifying EAT in Computed Tomography (CT) images, and the results agreed closely with expert evaluations. Code is available at: https://github.com/wy-9903/BMT-UNet.
背景和目的心外膜脂肪组织(EAT)被认为是心血管疾病的独立危险因素,其体积的增加与冠状动脉粥样硬化等疾病密切相关。传统的手动和半自动 EAT 分割方法依赖于主观判断,存在不确定性和不可靠性,限制了其在临床实践中的应用。因此,本研究旨在开发一种全自动的心包分割和量化方法,以提高 EAT 评估的准确性。BMT-UNet 由边界增强 (BE) 模块、多尺度 (MS) 模块和卷积变换器 (ConvT) 模块组成。编码部分的 MS 和 BE 模块旨在捕捉详细的边界特征,并通过将多尺度特征与形态学操作相结合,利用它们之间的互补性,准确划分心包边界。ConvT 模块整合了全局上下文信息,从而提高了整体分割的准确性,并解决了心包图像分割后出现内孔的问题。结果在包含 50 名患者的冠状动脉计算机断层扫描(CCTA)数据集中,所提出的心包和 EAT 分割方法的 Dice 系数和 Hausdorff 距离分别为 98.3% ± 0.2%、5.7±0.8 mm 和 93.9% ± 1.7%、2.1±0.3 mm。EAT分割体积与实际体积的线性回归系数为0.982,皮尔逊相关系数为0.99。Bland-Altman 分析进一步证实了自动方法和人工方法之间的高度一致性。这些结果表明,与现有方法相比,该方法有了很大改进,尤其是在分割精度和可靠性方面,而这两点对于临床应用至关重要。代码见:https://github.com/wy-9903/BMT-UNet。
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引用次数: 0
A design of computational stochastic framework for the mathematical severe acute respiratory syndrome coronavirus model 严重急性呼吸系统综合征冠状病毒数学模型的计算随机框架设计
IF 4.9 2区 医学 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2024-11-05 DOI: 10.1016/j.bspc.2024.107049
Atifa Asghar , Mohsan Hassan , Zulqurnain Sabir , Shahid Ahmad Bhat , Sharifah E Alhazmi
This study presents the comprehensive investigations into the dynamics of a novel coronavirus infection within a population, which accounts for all potential interactions in the disease’s spread. The solutions of the novel nonlinear infectious disease system are performed stochastically by using the Levenberg-Marquardt Backpropagation neural network. This process contains ten neurons and log-sigmoid transfer function in the hidden layers. The training data is taken as 74%, while the testing and authentication statics are used as 14% and 12%. To assess the precision of the designed solver, a comparison based on the obtained and reference results along with the negligible absolute error up to order fourth to seventh decimal places is performed for each case of the model. Stability and sensitivity analyses reveal the robustness of the model across various parameters. For the reliability, consistency, and correctness of the model across various states, and the numerical analysis with graphical form of the statistical indices based on correlation, error histograms, transition of state, and regression analysis is presented.
本研究对新型冠状病毒在人群中的感染动态进行了全面研究,考虑了疾病传播过程中所有潜在的相互作用。新型非线性传染病系统的求解是通过 Levenberg-Marquardt 反向传播神经网络随机进行的。该过程包含 10 个神经元,隐层中的传递函数为对数正余弦函数。训练数据占 74%,测试和验证静态数据分别占 14% 和 12%。为了评估所设计求解器的精确度,对模型的每种情况都进行了基于所获结果和参考结果的比较,以及可忽略的绝对误差(小数点后第四位至第七位)。稳定性和敏感性分析揭示了模型在不同参数下的稳健性。对于模型在各种状态下的可靠性、一致性和正确性,还提供了基于相关性、误差柱状图、状态转换和回归分析的统计指数的数字分析和图表形式。
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引用次数: 0
Skin cancer classification based on a hybrid deep model and long short-term memory 基于混合深度模型和长短期记忆的皮肤癌分类
IF 4.9 2区 医学 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2024-11-04 DOI: 10.1016/j.bspc.2024.107109
Samira Mavaddati
Skin cancer classification is an important topic in dermatology and oncology because it provides a framework for diagnosing and managing skin cancer, as well as for research and advocacy efforts. Deep learning-based methods have the potential to improve the efficiency and scalability of skin cancer classification by automatically processing large volumes of images without the need for intervention. The proposed method combines the ResNet50 deep model and long short-term memory (LSTM) network to process sequential data and represent the structural content of lesion texture better to overcome the limitations of a deep learning-based classification algorithm. This hybrid deep classifier, named ResNet50-LSTM, takes advantage of the benefits of both deep networks along with a transfer learning technique which allows a new model to start from a pre-trained model and fine-tune it for the specific task. Three scenarios are demonstrated in this paper that consists, the first one, ResNet50, the second one ResNet50 in combination with transfer learning technique (ResNet50-TL), and the third scenario, (ResNet50-LSTM-TL) deep model. Combining ResNet50, LSTM, and transfer learning techniques can improve the performance of skin cancer classification by allowing the model to take advantage of pre-trained features from a large dataset, analyze sequential features in medical images, and fine-tune them for the specific task of skin cancer classification. The performance of these scenarios is compared with the other deep learning models. The results of the conducted study demonstrate that the proposed third scenario is successful in accurately recognizing various skin cancers, with an impressive accuracy rate of over 99.09%. The findings indicate that the proposed algorithm has the potential to significantly enhance skin cancer classification and by improving their accuracy and efficiency.
皮肤癌分类是皮肤病学和肿瘤学的一个重要课题,因为它为皮肤癌的诊断和管理以及研究和宣传工作提供了一个框架。基于深度学习的方法可以自动处理大量图像,无需干预,从而提高皮肤癌分类的效率和可扩展性。所提出的方法结合了 ResNet50 深度模型和长短期记忆(LSTM)网络来处理连续数据,并更好地表示病变纹理的结构内容,以克服基于深度学习的分类算法的局限性。这种混合深度分类器被命名为 ResNet50-LSTM,它利用了两种深度网络的优点以及迁移学习技术,该技术允许新模型从预先训练好的模型开始,并针对特定任务对其进行微调。本文展示了三种方案,第一种是 ResNet50,第二种是结合迁移学习技术的 ResNet50(ResNet50-TL),第三种是(ResNet50-LSTM-TL)深度模型。将 ResNet50、LSTM 和迁移学习技术相结合可以提高皮肤癌分类的性能,使模型能够利用来自大型数据集的预训练特征,分析医学图像中的序列特征,并针对皮肤癌分类的特定任务对其进行微调。这些场景的性能与其他深度学习模型进行了比较。研究结果表明,所提出的第三种方案成功地准确识别了各种皮肤癌,准确率超过 99.09%,令人印象深刻。研究结果表明,所提出的算法有可能通过提高准确率和效率来显著增强皮肤癌分类能力。
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引用次数: 0
The utility of electroencephalographic measures in obsession compulsion disorder 脑电测量在强迫症中的应用
IF 4.9 2区 医学 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2024-11-04 DOI: 10.1016/j.bspc.2024.107113
Alireza Talesh Jafadideh , Mehdi Ejtehadi , Asghar Zarei , Maryam Ansari Esfeh , Saeid Yazdi-Ravandi , Nasrin Matinnia , Farshid Shamsaei , Mohammad Ahmadpanah , Ali Ghaleiha , Asiyeh Rezaei Niyasar , Reza Rostami , Reza Khosrowabadi

Background

Obsessive-compulsive disorder (OCD) is a potentially serious mental disorder that affects 1–2% of the world population. The OCD patients experience uncontrollable, and recurring thoughts (obsessions), and may feel a need to repeat behaviors (compulsions). In EEG studies, many different features have been investigated regarding their OCD diagnosis capability. However, there is no OCD study evaluating different EEG features with the same conditions and data.

Methods

To address the problem, we employed six popular resting-state EEG features, including absolute and relative power, Phase locking value (PLV), Weighted phase lag index (WPLI), approximate entropy, and Higuchi’s fractal dimension, to find out which feature can better discriminate OCDs from healthy controls (CON) under the same conditions and data. All the generated features were normalized using mean and standard deviation of values, calculated from 233 Iranian healthy people. After that, the most informative EEG features, discriminating 39 OCD individuals from age, handedness, and gender-matched, 39 CON were selected and entered into the classification process. In addition, an independent EEG dataset including 23 OCDs and 23 CONs was also used to investigate the consistency of the results.

Results

As expected, most of the significant differences were observed at the high frequency bands in Beta I-IV, and Gamma bands. The highest classification accuracies were achieved using the support vector machine applied on the PLV features of the main (94.8 %) and independent dataset (100 %)

Conclusions

These findings indicate that functional connectivity-based (PLV) features have a good potential to be used as a biomarker of OCD.
背景强迫症(OCD)是一种潜在的严重精神障碍,影响着全球 1-2% 的人口。强迫症患者会出现无法控制和反复出现的想法(强迫症),并可能感到需要重复行为(强迫症)。在脑电图研究中,已经对强迫症诊断能力的许多不同特征进行了调查。为了解决这个问题,我们采用了六种流行的静息态脑电图特征,包括绝对和相对功率、锁相值(PLV)、加权相位滞后指数(WPLI)、近似熵和樋口分形维度,以找出在相同条件和数据下哪种特征能更好地区分强迫症和健康对照组(CON)。所有生成的特征均使用从 233 名伊朗健康人中计算得出的平均值和标准偏差进行归一化处理。然后,选出最有信息量的脑电图特征,将 39 名强迫症患者与年龄、手型和性别匹配的 39 名健康对照者区分开来,并将其输入分类过程。此外,还使用了一个独立的脑电图数据集,其中包括 23 名强迫症患者和 23 名强迫症患者,以研究结果的一致性。使用支持向量机对主数据集(94.8%)和独立数据集(100%)的 PLV 特征进行分类,分类准确率最高。
{"title":"The utility of electroencephalographic measures in obsession compulsion disorder","authors":"Alireza Talesh Jafadideh ,&nbsp;Mehdi Ejtehadi ,&nbsp;Asghar Zarei ,&nbsp;Maryam Ansari Esfeh ,&nbsp;Saeid Yazdi-Ravandi ,&nbsp;Nasrin Matinnia ,&nbsp;Farshid Shamsaei ,&nbsp;Mohammad Ahmadpanah ,&nbsp;Ali Ghaleiha ,&nbsp;Asiyeh Rezaei Niyasar ,&nbsp;Reza Rostami ,&nbsp;Reza Khosrowabadi","doi":"10.1016/j.bspc.2024.107113","DOIUrl":"10.1016/j.bspc.2024.107113","url":null,"abstract":"<div><h3>Background</h3><div>Obsessive-compulsive disorder (OCD) is a potentially serious mental disorder that affects 1–2% of the world population. The OCD patients experience uncontrollable, and recurring thoughts (obsessions), and may feel a need to repeat behaviors (compulsions). In EEG studies, many different features have been investigated regarding their OCD diagnosis capability. However, there is no OCD study evaluating different EEG features with the same conditions and data.</div></div><div><h3>Methods</h3><div>To address the problem, we employed six popular resting-state EEG features, including absolute and relative power, Phase locking value (PLV), Weighted phase lag index (WPLI), approximate entropy, and Higuchi’s fractal dimension, to find out which feature can better discriminate OCDs from healthy controls (CON) under the same conditions and data. All the generated features were normalized using mean and standard deviation of values, calculated from 233 Iranian healthy people. After that, the most informative EEG features, discriminating 39 OCD individuals from age, handedness, and gender-matched, 39 CON were selected and entered into the classification process. In addition, an independent EEG dataset including 23 OCDs and 23 CONs was also used to investigate the consistency of the results.</div></div><div><h3>Results</h3><div>As expected, most of the significant differences were observed at the high frequency bands in Beta I-IV, and Gamma bands. The highest classification accuracies were achieved using the support vector machine applied on the PLV features of the main (94.8 %) and independent dataset (100 %)</div></div><div><h3>Conclusions</h3><div>These findings indicate that functional connectivity-based (PLV) features have a good potential to be used as a biomarker of OCD.</div></div>","PeriodicalId":55362,"journal":{"name":"Biomedical Signal Processing and Control","volume":"100 ","pages":"Article 107113"},"PeriodicalIF":4.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Optimized Wasserstein Deep Convolutional Generative Adversarial Network approach for the classification of COVID-19 and pneumonia 用于 COVID-19 和肺炎分类的优化 Wasserstein 深度卷积生成对抗网络方法
IF 4.9 2区 医学 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2024-11-03 DOI: 10.1016/j.bspc.2024.107100
A.B. Rajendra , B.S. Jayasri , S. Ramya , Shruthi Jagadish
In the context of diagnosing lung disorders like bacterial and viral pneumonia and COVID-19, the challenge of sample scarcity often results in imbalanced datasets, making reliable forecasting difficult. To address this, an Optimized Wasserstein Deep Convolutional Generative Adversarial Network Technique was proposed for the Classification of COVID-19 and Pneumonia (CCP WDCGAN-SOA). The proposed approach utilizes CT scan and X-ray images from two datasets: the COVID-19 Posterior-Anterior Chest Radiography Images Curated Dataset and the COVID QU-Ex Dataset. Due to the imbalance in these datasets, a Label Correlation Guided Borderline Oversampling (LCGBO) method was introduced to balance the classes effectively. Following data balancing, the images undergo pre-processing using Multimodal Hierarchical Graph Collaborative Filtering (MHGCF) for resizing. Subsequently, the processed images are fed into a Wasserstein Deep Convolutional Generative Adversarial Network (WDCGAN) optimized with the Seasons Optimization Algorithm (SOA) to enhance classification accuracy for COVID-19 and pneumonia. The implementation in MATLAB demonstrates that the CCP-WDCGAN-SOA technique significantly outperforms existing methods. Specifically, the proposed approach achieves improvements of 21.5 %, 23 %, and 22.5 % in accuracy, 12.3 %, 17.5 %, and 14 % in recall, and 22.3 %, 27.5 %, and 24 % in specificity compared to DC-CXI-CoviXNet, CPD-CXI-CNN, and ADC-CXI-DFFC Net using the COVID-19 Posterior-Anterior Chest Radiography Images Curated Dataset. Additionally, the proposed method shows gains of 21.52%, 27.05%, and 23.24% in accuracy, 23.71%, 26.45%, and 21.74% in recall, and 28.61%, 22.15%, and 26.44% in specificity over ASC-CXI-LRANet, RCP-MIA-CNN, and AQCD-CR-GAN using the COVID-QU-Ex Dataset.
在诊断细菌性和病毒性肺炎以及 COVID-19 等肺部疾病时,样本稀缺往往会导致数据集不平衡,从而难以做出可靠的预测。为解决这一问题,提出了一种用于 COVID-19 和肺炎分类的优化 Wasserstein 深度卷积生成对抗网络技术(CCP WDCGAN-SOA)。所提出的方法利用了两个数据集中的 CT 扫描和 X 光图像:COVID-19 后-前胸部放射影像策展数据集和 COVID QU-Ex 数据集。由于这些数据集存在不平衡,因此引入了标签相关性引导的边界线过采样(LCGBO)方法,以有效平衡类别。数据平衡后,使用多模态层次图协同过滤(MHGCF)对图像进行预处理,以调整大小。随后,将处理后的图像输入使用季节优化算法(SOA)优化的 Wasserstein 深度卷积生成对抗网络(WDCGAN),以提高 COVID-19 和肺炎的分类准确性。在 MATLAB 中的实施表明,CCP-WDCGAN-SOA 技术明显优于现有方法。具体来说,与使用 COVID-19 后胸前放射影像数据集的 DC-CXI-CoviXNet、CPD-CXI-CNN 和 ADC-CXI-DFFC Net 相比,所提出的方法在准确率方面分别提高了 21.5%、23% 和 22.5%,在召回率方面分别提高了 12.3%、17.5% 和 14%,在特异性方面分别提高了 22.3%、27.5% 和 24%。此外,与使用 COVID-QU-Ex 数据集的 ASC-CXI-LRANet、RCP-MIA-CNN 和 AQCD-CR-GAN 相比,拟议方法的准确率提高了 21.52%、27.05% 和 23.24%,召回率提高了 23.71%、26.45% 和 21.74%,特异性提高了 28.61%、22.15% 和 26.44%。
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引用次数: 0
TIGC-Net: Transformer-Improved Graph Convolution Network for spatio-temporal prediction TIGC-Net:用于时空预测的变换器改进图卷积网络
IF 4.9 2区 医学 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2024-11-03 DOI: 10.1016/j.bspc.2024.107024
Kai Chen , Zhengyuan Zhou , Yao Liu , Tianjiao Ji , Weiya Sun , Chunfeng Yang , Yang Chen , Xiao Lu
Modeling spatio-temporal sequences is an important topic yet challenging for existing neural networks. Most of the current spatio-temporal sequence prediction methods usually capture features separately in temporal and spatial dimensions or employ multiple mutually independent local spatio-temporal graphs to represent a spatio-temporal sequence. The first kind of method mentioned above is difficult to mine the complex spatio-temporal correlations, while the other is limited for the accuracy of long-term predictions. To handle these issues, this paper proposes a Transformer-Improved Graph Convolution Network for spatio-temporal prediction. Specifically, the temporal location encoding method is exploited to derive the spatio-temporal characteristics of the sequence utilizing a spatio-temporal feature fusion network. In addition, a spatio-temporal attention network is developed to enhance the spatio-temporal correlation of the sequence, and the dynamic spatial features of sequence are further extracted through the adaptive graph convolution network. A private dataset and a public dataset are employed to demonstrate the performance of the proposed TIGC-Net. The qualitative and quantitative results show that the proposed TIGC-Net can extract dynamic spatio-temporal properties more effectively, enhance the spatio-temporal correlation of sequences and improve the prediction accuracy compared with four state-of-the-art.
时空序列建模是一个重要的课题,但对现有的神经网络来说具有挑战性。目前大多数时空序列预测方法通常分别从时间和空间维度捕捉特征,或采用多个相互独立的局部时空图来表示时空序列。上述第一种方法难以挖掘复杂的时空相关性,而另一种方法则限制了长期预测的准确性。为了解决这些问题,本文提出了一种用于时空预测的变换器改进图卷积网络。具体来说,利用时空位置编码方法,利用时空特征融合网络得出序列的时空特征。此外,还开发了时空注意力网络来增强序列的时空相关性,并通过自适应图卷积网络进一步提取序列的动态空间特征。为了证明所提出的 TIGC 网络的性能,我们使用了一个私有数据集和一个公共数据集。定性和定量结果表明,与最先进的四种方法相比,所提出的 TIGC-Net 能够更有效地提取动态时空特性,增强序列的时空相关性,并提高预测精度。
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引用次数: 0
Optimising rooftop photovoltaic adoption in urban landscapes: A system dynamics approach for sustainable energy transitions 优化城市景观中屋顶光伏的采用:可持续能源转型的系统动力学方法
IF 4.9 2区 医学 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2024-11-02 DOI: 10.1016/j.bspc.2024.107071
P.U. Poornima , K. Dhineshkumar , Chunduri Kiran Kumar , S. Sumana , M.V. Rama Sundari , P. Sivaraman , Mohammed Shuaib , A. Rajaram
Rooftop agriculture for food production and photovoltaic (PV) panels for energy generation are two examples of how urban functional design presents a potential alternative to multi-function urban land-use that may give numerous ecosystem services. In order to find the optimal rooftop usage strategy that takes into account many choice criteria and to comprehend how rooftop solutions affect the layout of urban energy infrastructure, we provide a complete system modeling approach that demonstrates multi-objective optimization of energy systems. With a reduced levelized cost of electricity (LCOE), rooftop photovoltaics have gained considerable traction recently owing to technical, economical, and environmental benefits; this research aims to prove their viability. The suggested PV size and cost factor, taking environmental conditions and shading effects into consideration, were determined using two methods: Quantum Particle Swarm Optimization (PSO) with Q-Learning System. Rooftop photovoltaics system sizing, economic feasibility, and energy efficiency are all affected by the results that are compared. University of Engineering & Technology (UET), a public sector institution, has its main campus in Taxila, where this research was conducted. Situated in northern Pakistan, its appropriate position is advantageous for the research. The lifespan, performance ratio (PR), and decrease of the Rooftop Photovoltaics system’s carbon footprint are among the many additional criteria that are examined. Because of this, installing rooftop photovoltaic systems on government buildings is a more sensible and feasible solution.
用于粮食生产的屋顶农业和用于能源生产的光伏(PV)板是城市功能设计的两个例子,说明了城市土地多功能利用的潜在替代方案可提供多种生态系统服务。为了找到考虑多种选择标准的最佳屋顶使用策略,并理解屋顶解决方案如何影响城市能源基础设施的布局,我们提供了一种完整的系统建模方法,展示了能源系统的多目标优化。由于降低了平准化电力成本(LCOE),屋顶光伏发电因其技术、经济和环境效益而在近期获得了广泛关注;本研究旨在证明其可行性。考虑到环境条件和遮阳效应,我们采用两种方法确定了建议的光伏发电规模和成本因素:量子粒子群优化(PSO)与 Q-Learning 系统。屋顶光伏系统的大小、经济可行性和能源效率都会受到比较结果的影响。工程与技术大学(UET)是一所公立院校,其主校区位于塔克西拉(Taxila)。该校位于巴基斯坦北部,地理位置得天独厚,有利于研究工作的开展。屋顶光伏系统的使用寿命、性能比 (PR) 和碳足迹的减少是研究的众多附加标准之一。因此,在政府大楼安装屋顶光伏系统是一个更加合理可行的解决方案。
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引用次数: 0
IoT enabled smart healthcare system for COVID-19 classification using optimized robust spatiotemporal graph convolutional networks 利用优化的鲁棒时空图卷积网络进行 COVID-19 分类的物联网智能医疗系统
IF 4.9 2区 医学 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2024-11-02 DOI: 10.1016/j.bspc.2024.107104
A. Velayudham , R. Karthick , A. Sivabalan , V. Sathya
Healthcare organizations and academics are paying close attention to the development of smart medical sensors, gadgets, cloud computing, and other health-related technology. To actively diagnose and control the spread of COVID-19, an effectual automated system is required. Therefore, this paper proposes an IoT enabled Smart Healthcare System for COVID-19 Classification Using Optimized Robust Spatiotemporal Graph Convolutional Networks (IoT-RSGCN-SGWOA-CD19). Here, the input images are collected through Chest X-Ray dataset. The input images are preprocessed by utilizing Adaptive two-stage unscented Kalman filter (ATSUKF). Next, the pre-processed images are fed into Two-Dimensional Spectral Graph Wavelets (2DSGW) for extracting features. The extracted features are supplied to the feature selection to select the appropriate features using Clouded Leopard Optimization (CLO). Then, Robust Spatiotemporal Graph Convolutional Network (RSGCN) is proposed to classify the disease as pneumonia, normal and COVID-19. The weight parameter of RSGCN is optimally tuned by Sunflower based Grey Wolf Optimization Algorithm(SFGWOA), improving its accuracy in disease screening and infectious disease categorization. The effectiveness of the proposed IoT-RSGCN-SGWOA-CD19 method is implemented in MATLAB and evaluated through performance metrics, likes accuracy, precision, recall, ROC, AUC, loss. The IoT-RSGCN SGWOA-CD19 method attains 23.64 %, 20.98 % and 24.33 % higher accuracy, 13.24 %, 30.43 % and 28.71 % higher precision and 27.79 %, 23.84 % and 26.62 % higher recall when analyzed with the existing models. The experimental results confirm that the IoT-RSGCN-SGWOA-CD19 method offers a significant advancement in automated COVID-19 screening, with superior classification accuracy and reliability. The proposed system can be a valuable tool in pandemic control by providing rapid and accurate diagnoses.
医疗机构和学术界都在密切关注智能医疗传感器、小工具、云计算和其他健康相关技术的发展。为了积极诊断和控制 COVID-19 的传播,需要一个有效的自动化系统。因此,本文提出了一种物联网智能医疗系统,利用优化的鲁棒时空图卷积网络(IoT-RSGCN-SGWOA-CD19)对 COVID-19 进行分类。输入图像通过胸部 X 光数据集收集。输入图像通过自适应两级无香卡尔曼滤波器(ATSUKF)进行预处理。然后,将预处理后的图像输入二维频谱图小波(2DSGW)以提取特征。提取的特征将提供给特征选择,以使用云豹优化(CLO)选择合适的特征。然后,提出鲁棒时空图卷积网络(RSGCN),将疾病分为肺炎、正常和 COVID-19。通过基于向日葵的灰狼优化算法(SFGWOA)对 RSGCN 的权重参数进行优化,提高了其在疾病筛查和传染病分类中的准确性。在 MATLAB 中实现了所提出的 IoT-RSGCN-SGWOA-CD19 方法,并通过准确率、精确度、召回率、ROC、AUC、损失等性能指标对其有效性进行了评估。物联网-RSGCN-SGWOA-CD19 方法与现有模型相比,准确度分别提高了 23.64 %、20.98 % 和 24.33 %,精确度分别提高了 13.24 %、30.43 % 和 28.71 %,召回率分别提高了 27.79 %、23.84 % 和 26.62 %。实验结果证实,IoT-RSGCN-SGWOA-CD19 方法在 COVID-19 自动筛查方面取得了重大进展,具有卓越的分类准确性和可靠性。所提出的系统可以提供快速准确的诊断,是大流行病控制的重要工具。
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引用次数: 0
FV-DDC: A novel finger-vein recognition model with deformation detection and correction FV-DDC:带有形变检测和校正功能的新型指静脉识别模型
IF 4.9 2区 医学 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2024-11-02 DOI: 10.1016/j.bspc.2024.107098
Hengyi Ren , Lijuan Sun , Jinting Ren , Ying Cao
Finger vein recognition has gained widespread attention for personal identification due to its robustness and resistance to forgery. While Convolutional Neural Network (CNN)-based finger vein recognition algorithms have shown promising performance, several challenges remain. Firstly, existing methods often fail to effectively handle complex finger deformations, such as bending and rotation, which frequently occur in real-world applications. Secondly, CNN-based approaches typically require large training datasets, yet the available finger vein datasets are limited in size. To address these challenges, this paper presents a novel CNN-based finger vein recognition algorithm, FV-DDC, incorporating a lightweight finger deformation correction module, FVTN. The FVTN module autonomously learns and corrects finger deformations using matrix transformations, offering a new approach to CNN-based deformation correction. The primary advantages of FV-DDC are twofold: automatic finger deformation correction, which simplifies preprocessing, and data augmentation during deformation correction, reducing the dependency on large datasets. Extensive experiments were conducted on three publicly available datasets to validate the effectiveness of the proposed algorithm. The results show that FV-DDC achieves superior recognition performance, particularly in scenarios involving missing data and deformation interference, with recognition accuracies of 99.62% on HKPU, 99.80% on FV-USM, and 98.74% on SDUMLA.
手指静脉识别因其鲁棒性和抗伪造性而在个人身份识别领域受到广泛关注。虽然基于卷积神经网络(CNN)的手指静脉识别算法已显示出良好的性能,但仍存在一些挑战。首先,现有方法往往无法有效处理复杂的手指变形,如弯曲和旋转,而这在实际应用中经常出现。其次,基于 CNN 的方法通常需要大量的训练数据集,但现有的手指静脉数据集规模有限。为了应对这些挑战,本文提出了一种基于 CNN 的新型指静脉识别算法 FV-DDC,其中包含一个轻量级手指变形校正模块 FVTN。FVTN 模块利用矩阵变换自主学习和修正手指变形,为基于 CNN 的变形修正提供了一种新方法。FV-DDC 的主要优势有两个方面:自动手指形变校正简化了预处理;形变校正过程中的数据增强减少了对大型数据集的依赖。为了验证所提算法的有效性,我们在三个公开的数据集上进行了广泛的实验。结果表明,FV-DDC 实现了卓越的识别性能,尤其是在涉及数据缺失和形变干扰的情况下,在 HKPU 上的识别准确率为 99.62%,在 FV-USM 上为 99.80%,在 SDUMLA 上为 98.74%。
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引用次数: 0
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Biomedical Signal Processing and Control
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