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An Integrated Approach to Condition-Based Maintenance Decision-Making of Planetary Gearboxes: Combining Temporal Convolutional Network Auto Encoders with Wiener Process
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作者 Bo Zhu Enzhi Dong +3 位作者 Zhonghua Cheng Xianbiao Zhan Kexin Jiang Rongcai Wang 《Computers, Materials & Continua》 2026年第1期661-686,共26页
With the increasing complexity of industrial automation,planetary gearboxes play a vital role in largescale equipment transmission systems,directly impacting operational efficiency and safety.Traditional maintenance s... With the increasing complexity of industrial automation,planetary gearboxes play a vital role in largescale equipment transmission systems,directly impacting operational efficiency and safety.Traditional maintenance strategies often struggle to accurately predict the degradation process of equipment,leading to excessive maintenance costs or potential failure risks.However,existing prediction methods based on statistical models are difficult to adapt to nonlinear degradation processes.To address these challenges,this study proposes a novel condition-based maintenance framework for planetary gearboxes.A comprehensive full-lifecycle degradation experiment was conducted to collect raw vibration signals,which were then processed using a temporal convolutional network autoencoder with multi-scale perception capability to extract deep temporal degradation features,enabling the collaborative extraction of longperiod meshing frequencies and short-term impact features from the vibration signals.Kernel principal component analysis was employed to fuse and normalize these features,enhancing the characterization of degradation progression.A nonlinear Wiener process was used to model the degradation trajectory,with a threshold decay function introduced to dynamically adjust maintenance strategies,and model parameters optimized through maximum likelihood estimation.Meanwhile,the maintenance strategy was optimized to minimize costs per unit time,determining the optimal maintenance timing and preventive maintenance threshold.The comprehensive indicator of degradation trends extracted by this method reaches 0.756,which is 41.2%higher than that of traditional time-domain features;the dynamic threshold strategy reduces the maintenance cost per unit time to 55.56,which is 8.9%better than that of the static threshold optimization.Experimental results demonstrate significant reductions in maintenance costs while enhancing system reliability and safety.This study realizes the organic integration of deep learning and reliability theory in the maintenance of planetary gearboxes,provides an interpretable solution for the predictive maintenance of complex mechanical systems,and promotes the development of condition-based maintenance strategies for planetary gearboxes. 展开更多
关键词 temporal convolutional network autoencoder full lifecycle degradation experiment nonlinear Wiener process condition-based maintenance decision-making fault monitoring
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Deep Learning Framework for Predicting Essential Proteins with Temporal Convolutional Networks
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作者 LU Pengli YANG Peishi LIAO Yonggang 《Journal of Shanghai Jiaotong university(Science)》 2025年第3期510-520,共11页
Essential proteins are an indispensable part of cells and play an extremely significant role in genetic disease diagnosis and drug development.Therefore,the prediction of essential proteins has received extensive atte... Essential proteins are an indispensable part of cells and play an extremely significant role in genetic disease diagnosis and drug development.Therefore,the prediction of essential proteins has received extensive attention from researchers.Many centrality methods and machine learning algorithms have been proposed to predict essential proteins.Nevertheless,the topological characteristics learned by the centrality method are not comprehensive enough,resulting in low accuracy.In addition,machine learning algorithms need sufficient prior knowledge to select features,and the ability to solve imbalanced classification problems needs to be further strengthened.These two factors greatly affect the performance of predicting essential proteins.In this paper,we propose a deep learning framework based on temporal convolutional networks to predict essential proteins by integrating gene expression data and protein-protein interaction(PPI)network.We make use of the method of network embedding to automatically learn more abundant features of proteins in the PPI network.For gene expression data,we treat it as sequence data,and use temporal convolutional networks to extract sequence features.Finally,the two types of features are integrated and put into the multi-layer neural network to complete the final classification task.The performance of our method is evaluated by comparing with seven centrality methods,six machine learning algorithms,and two deep learning models.The results of the experiment show that our method is more effective than the comparison methods for predicting essential proteins. 展开更多
关键词 temporal convolutional networks node2vec protein-protein interaction(PPI)network essential proteins gene expression data
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基于TCN-Informer的长短期多变量时间序列预测
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作者 李德权 江涛 《科学技术与工程》 北大核心 2026年第4期1549-1557,共9页
为了解决时间序列预测长期和短期依赖关系的难题,同时捕捉长期趋势和短期动态,并对多变量时间序列中变量间复杂的相互依赖关系进行建模,提出了一种基于时间卷积网络(temporal convolutional network,TCN)的预测方法。首先,采用TCN来有... 为了解决时间序列预测长期和短期依赖关系的难题,同时捕捉长期趋势和短期动态,并对多变量时间序列中变量间复杂的相互依赖关系进行建模,提出了一种基于时间卷积网络(temporal convolutional network,TCN)的预测方法。首先,采用TCN来有效捕捉序列变量在时间尺度上的特征,同时将压缩-激励模块(squeeze-and-excitation block,SE_Block)应用于TCN的输出。该模块通过增强多变量的表示,有效解决短期依赖性问题,并提高模型捕捉关键短期信息的能力。其次,引入Informer模型来增强长期序列处理能力,不仅有效解决了长期序列预测中的计算效率问题,还增强了模型对全局时间依赖关系的建模能力。最后,在设备状态监测(ETTm1)、交通流量(Traffic)和电力负荷(Electricity)三个数据集上将所提方法与现有的时间序列模型进行实验验证并比较。结果表明:所提出的方法在长期和短期时间序列预测中的误差率较低,能够有效提高多变量时间序列中长期和短期预测性能。 展开更多
关键词 长短期时间序列 多变量时间序列 INFORMER 时间卷积网络(tcn) 特征提取
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基于二次分解和TSO-TCN的分时电量预测
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作者 王永利 李一鸣 +5 位作者 延子昕 白雪峰 詹祥澎 田传波 杜苁聪 周颖 《科学技术与工程》 北大核心 2026年第4期1509-1517,共9页
分时电量是具有趋势性特征、季节性特征以及随机性特征的非平稳序列,使用传统方法进行预测会造成较大的误差。为提高复杂特征下分时电量的预测精度,提出了一种基于二次分解和金枪鱼群优化算法-时域卷积网络(tuna swarm optimization-tem... 分时电量是具有趋势性特征、季节性特征以及随机性特征的非平稳序列,使用传统方法进行预测会造成较大的误差。为提高复杂特征下分时电量的预测精度,提出了一种基于二次分解和金枪鱼群优化算法-时域卷积网络(tuna swarm optimization-temporal convolutional network,TSO-TCN)的电量预测模型。首先,使用变分非线性调频模态分解(variational nonlinear chirp mode decomposition,VNCMD)对原始电量数据进行分解,基于相关性分析与改进小波阈值法进行去噪处理,将去噪后数据进行辛几何模态分解(symplectic geometry mode decomposition,SGMD)得到分量序列;其次,采取K-均值聚类对分量序列进行合并,对聚类后的分量序列分别建立TSO-TCN预测模型进行预测;最后累加求和,确定最终预测结果。实验结果表明,所提出方法预测精度良好,为传统的分解-集成预测方法提供了新的思路。 展开更多
关键词 特征提取 聚类分析 变分非线性调频模态分解(VNCMD) 辛几何模态分解(SGMD) 时域卷积网络(tcn)
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一种融合MSC和时空双重注意力的TCN航迹预测方法
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作者 焦卫东 杨蓓 《北京航空航天大学学报》 北大核心 2026年第1期15-27,共13页
针对现有航迹预测模型难以有效提取多尺度时空特征,导致预测精度受限的问题,提出一种融合多尺度卷积(MSC)网络和时空双重注意力(STDA)的时间卷积网络(TCN)航迹预测方法MDAT-Net。MDAT-Net模型包含MSAT、MTAT航迹预测模块及投票模块。在... 针对现有航迹预测模型难以有效提取多尺度时空特征,导致预测精度受限的问题,提出一种融合多尺度卷积(MSC)网络和时空双重注意力(STDA)的时间卷积网络(TCN)航迹预测方法MDAT-Net。MDAT-Net模型包含MSAT、MTAT航迹预测模块及投票模块。在航迹预测模块中,为优化传统时间卷积网络中卷积核大小固定的问题,搭建由不同尺度卷积核组成的多尺度卷积架构,以更好地提取不同尺度的时空特征;为动态挖掘隐藏特征与目标特征之间的潜在相关性,引入空间注意力机制及时间注意力机制来自适应地关注重要信息,跳过次要信息。在投票模块中,决定各维度使用合适模块进行预测,以融合MSAT、MTAT航迹预测模块的优点,实现高精度的航迹预测。实验结果表明:MDAT-Net模型的均方根误差(RMSE)的改进率最高可达83.33%,平均绝对误差(MAE)的改进率最高可达85.85%,具有较高的准确性和鲁棒性。 展开更多
关键词 航迹预测 多尺度卷积 时间卷积网络 注意力机制 时空特征
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Spectrum Sensing via Temporal Convolutional Network 被引量:9
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作者 Tao Ni Xiaojin Ding +3 位作者 Yunfeng Wang Jun Shen Lifeng Jiang Gengxin Zhang 《China Communications》 SCIE CSCD 2021年第9期37-47,共11页
In this paper,we investigate a spectrumsensing system in the presence of a satellite,where the satellite works as a sensing node.Considering the conventional energy detection method is sensitive to the noise uncertain... In this paper,we investigate a spectrumsensing system in the presence of a satellite,where the satellite works as a sensing node.Considering the conventional energy detection method is sensitive to the noise uncertainty,thus,a temporal convolutional network(TCN)based spectrum-sensing method is designed to eliminate the effect of the noise uncertainty and improve the performance of spectrum sensing,relying on the offline training and the online detection stages.Specifically,in the offline training stage,spectrum data captured by the satellite is sent to the TCN deployed on the gateway for training purpose.Moreover,in the online detection stage,the well trained TCN is utilized to perform real-time spectrum sensing,which can upgrade spectrum-sensing performance by exploiting the temporal features.Additionally,simulation results demonstrate that the proposed method achieves a higher probability of detection than that of the conventional energy detection(ED),the convolutional neural network(CNN),and deep neural network(DNN).Furthermore,the proposed method outperforms the CNN and the DNN in terms of a lower computational complexity. 展开更多
关键词 cognitive radio spectrum sensing deep learning temporal convolutional network satellite communication
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A production prediction method of single well in water flooding oilfield based on integrated temporal convolutional network model 被引量:5
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作者 ZHANG Lei DOU Hongen +6 位作者 WANG Tianzhi WANG Hongliang PENG Yi ZHANG Jifeng LIU Zongshang MI Lan JIANG Liwei 《Petroleum Exploration and Development》 CSCD 2022年第5期1150-1160,共11页
Since the oil production of single well in water flooding reservoir varies greatly and is hard to predict, an oil production prediction method of single well based on temporal convolutional network(TCN) is proposed an... Since the oil production of single well in water flooding reservoir varies greatly and is hard to predict, an oil production prediction method of single well based on temporal convolutional network(TCN) is proposed and verified. This method is started from data processing, the correspondence between water injectors and oil producers is determined according to the influence radius of the water injectors, the influence degree of a water injector on an oil producer in the month concerned is added as a model feature, and a Random Forest(RF) model is built to fill the dynamic data of water flooding. The single well history is divided into 4 stages according to its water cut, that is, low water cut, middle water cut, high water cut and extra-high water cut stages. In each stage, a TCN based prediction model is established, hyperparameters of the model are optimized by the Sparrow Search Algorithm(SSA). Finally, the models of the 4 stages are integrated into one whole-life model of the well for production prediction. The application of this method in Daqing Oilfield, NE China shows that:(1) Compared with conventional data processing methods, the data obtained by this processing method are more close to the actual production, and the data set obtained is more authentic and complete.(2) The TCN model has higher prediction accuracy than other 11 models such as Long Short Term Memory(LSTM).(3) Compared with the conventional full-life-cycle models, the model of integrated stages can significantly reduce the error of production prediction. 展开更多
关键词 single well production prediction temporal convolutional network time series prediction water flooding reservoir
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Occluded Gait Emotion Recognition Based on Multi-Scale Suppression Graph Convolutional Network
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作者 Yuxiang Zou Ning He +2 位作者 Jiwu Sun Xunrui Huang Wenhua Wang 《Computers, Materials & Continua》 SCIE EI 2025年第1期1255-1276,共22页
In recent years,gait-based emotion recognition has been widely applied in the field of computer vision.However,existing gait emotion recognition methods typically rely on complete human skeleton data,and their accurac... In recent years,gait-based emotion recognition has been widely applied in the field of computer vision.However,existing gait emotion recognition methods typically rely on complete human skeleton data,and their accuracy significantly declines when the data is occluded.To enhance the accuracy of gait emotion recognition under occlusion,this paper proposes a Multi-scale Suppression Graph ConvolutionalNetwork(MS-GCN).TheMS-GCN consists of three main components:Joint Interpolation Module(JI Moudle),Multi-scale Temporal Convolution Network(MS-TCN),and Suppression Graph Convolutional Network(SGCN).The JI Module completes the spatially occluded skeletal joints using the(K-Nearest Neighbors)KNN interpolation method.The MS-TCN employs convolutional kernels of various sizes to comprehensively capture the emotional information embedded in the gait,compensating for the temporal occlusion of gait information.The SGCN extracts more non-prominent human gait features by suppressing the extraction of key body part features,thereby reducing the negative impact of occlusion on emotion recognition results.The proposed method is evaluated on two comprehensive datasets:Emotion-Gait,containing 4227 real gaits from sources like BML,ICT-Pollick,and ELMD,and 1000 synthetic gaits generated using STEP-Gen technology,and ELMB,consisting of 3924 gaits,with 1835 labeled with emotions such as“Happy,”“Sad,”“Angry,”and“Neutral.”On the standard datasets Emotion-Gait and ELMB,the proposed method achieved accuracies of 0.900 and 0.896,respectively,attaining performance comparable to other state-ofthe-artmethods.Furthermore,on occlusion datasets,the proposedmethod significantly mitigates the performance degradation caused by occlusion compared to other methods,the accuracy is significantly higher than that of other methods. 展开更多
关键词 KNN interpolation multi-scale temporal convolution suppression graph convolutional network gait emotion recognition human skeleton
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Using BlazePose on Spatial Temporal Graph Convolutional Networks for Action Recognition 被引量:2
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作者 Motasem S.Alsawadi El-Sayed M.El-kenawy Miguel Rio 《Computers, Materials & Continua》 SCIE EI 2023年第1期19-36,共18页
The ever-growing available visual data(i.e.,uploaded videos and pictures by internet users)has attracted the research community’s attention in the computer vision field.Therefore,finding efficient solutions to extrac... The ever-growing available visual data(i.e.,uploaded videos and pictures by internet users)has attracted the research community’s attention in the computer vision field.Therefore,finding efficient solutions to extract knowledge from these sources is imperative.Recently,the BlazePose system has been released for skeleton extraction from images oriented to mobile devices.With this skeleton graph representation in place,a Spatial-Temporal Graph Convolutional Network can be implemented to predict the action.We hypothesize that just by changing the skeleton input data for a different set of joints that offers more information about the action of interest,it is possible to increase the performance of the Spatial-Temporal Graph Convolutional Network for HAR tasks.Hence,in this study,we present the first implementation of the BlazePose skeleton topology upon this architecture for action recognition.Moreover,we propose the Enhanced-BlazePose topology that can achieve better results than its predecessor.Additionally,we propose different skeleton detection thresholds that can improve the accuracy performance even further.We reached a top-1 accuracy performance of 40.1%on the Kinetics dataset.For the NTU-RGB+D dataset,we achieved 87.59%and 92.1%accuracy for Cross-Subject and Cross-View evaluation criteria,respectively. 展开更多
关键词 Action recognition BlazePose graph neural network OpenPose SKELETON spatial temporal graph convolution network
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基于TCN-MDN和概率潮流的电力系统灵活性量化分析方法
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作者 高天宇 徐天奇 李琰 《现代电子技术》 北大核心 2026年第2期133-141,共9页
高比例可再生能源的接入使电力系统的潮流具有波动性和随机性,也为电力系统的灵活运行带来了挑战。为了应对挑战,首要策略是建立一种灵活性量化和分析方法,用来表征灵活性资源供需平衡与系统运行之间的关系,为此,提出一种基于神经网络... 高比例可再生能源的接入使电力系统的潮流具有波动性和随机性,也为电力系统的灵活运行带来了挑战。为了应对挑战,首要策略是建立一种灵活性量化和分析方法,用来表征灵活性资源供需平衡与系统运行之间的关系,为此,提出一种基于神经网络和概率潮流的电力系统灵活性量化和分析方法。首先,构建神经网络对可再生能源的出力进行多时间尺度的概率预测;其次,引入考虑静态特性的潮流模型,通过系统频率来反映电力系统有功灵活性的供需平衡;然后,改进半不变量法,结合Gram-Charlier级数展开得到系统频率和线路潮流的概率密度函数,以此量化电力系统灵活性;最后,基于修改后的IEEE-30节点系统,通过与蒙特卡洛法对比来验证所提方法的准确性。实验结果表明,所提方法能够在概率框架下量化电力系统的灵活性,具有较高的运算精度和较快的速度。 展开更多
关键词 时序混合密度网络 tcn 概率预测 线性潮流模型 半不变量法 灵活性量化 Gram-Charlier级数
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TSCND:Temporal Subsequence-Based Convolutional Network with Difference for Time Series Forecasting 被引量:1
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作者 Haoran Huang Weiting Chen Zheming Fan 《Computers, Materials & Continua》 SCIE EI 2024年第3期3665-3681,共17页
Time series forecasting plays an important role in various fields, such as energy, finance, transport, and weather. Temporal convolutional networks (TCNs) based on dilated causal convolution have been widely used in t... Time series forecasting plays an important role in various fields, such as energy, finance, transport, and weather. Temporal convolutional networks (TCNs) based on dilated causal convolution have been widely used in time series forecasting. However, two problems weaken the performance of TCNs. One is that in dilated casual convolution, causal convolution leads to the receptive fields of outputs being concentrated in the earlier part of the input sequence, whereas the recent input information will be severely lost. The other is that the distribution shift problem in time series has not been adequately solved. To address the first problem, we propose a subsequence-based dilated convolution method (SDC). By using multiple convolutional filters to convolve elements of neighboring subsequences, the method extracts temporal features from a growing receptive field via a growing subsequence rather than a single element. Ultimately, the receptive field of each output element can cover the whole input sequence. To address the second problem, we propose a difference and compensation method (DCM). The method reduces the discrepancies between and within the input sequences by difference operations and then compensates the outputs for the information lost due to difference operations. Based on SDC and DCM, we further construct a temporal subsequence-based convolutional network with difference (TSCND) for time series forecasting. The experimental results show that TSCND can reduce prediction mean squared error by 7.3% and save runtime, compared with state-of-the-art models and vanilla TCN. 展开更多
关键词 DIFFERENCE data prediction time series temporal convolutional network dilated convolution
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A Lightweight Temporal Convolutional Network for Human Motion Prediction 被引量:1
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作者 WANG You QIAO Bing 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2022年第S01期150-157,共8页
A lightweight multi-layer residual temporal convolutional network model(RTCN)is proposed to target the highly complex kinematics and temporal correlation of human motion.RTCN uses 1-D convolution to efficiently obtain... A lightweight multi-layer residual temporal convolutional network model(RTCN)is proposed to target the highly complex kinematics and temporal correlation of human motion.RTCN uses 1-D convolution to efficiently obtain the spatial structure information of human motion and extract the correlation in the time series of human motion.The residual structure is applied to the proposed network model to alleviate the problem of gradient disappearance in the deep network.Experiments on the Human 3.6M dataset demonstrate that the proposed method effectively reduces the errors of motion prediction compared with previous methods,especially of long-term prediction. 展开更多
关键词 human motion prediction temporal convolutional network short-term prediction long-term prediction deep neural network
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Training-based symbol detection with temporal convolutional neural network in single-polarized optical communication system 被引量:1
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作者 Yingzhe Luo Jianhao Hu 《Digital Communications and Networks》 SCIE CSCD 2023年第4期920-930,共11页
In order to reduce the physical impairment caused by signal distortion,in this paper,we investigate symbol detection with Deep Learning(DL)methods to improve bit-error performance in the optical communication system.M... In order to reduce the physical impairment caused by signal distortion,in this paper,we investigate symbol detection with Deep Learning(DL)methods to improve bit-error performance in the optical communication system.Many DL-based methods have been applied to such systems to improve bit-error performance.Referring to the speech-to-text method of automatic speech recognition,this paper proposes a signal-to-symbol method based on DL and designs a receiver for symbol detection on single-polarized optical communications modes.To realize this detection method,we propose a non-causal temporal convolutional network-assisted receiver to detect symbols directly from the baseband signal,which specifically integrates most modules of the receiver.Meanwhile,we adopt three training approaches for different signal-to-noise ratios.We also apply a parametric rectified linear unit to enhance the noise robustness of the proposed network.According to the simulation experiments,the biterror-rate performance of the proposed method is close to or even superior to that of the conventional receiver and better than the recurrent neural network-based receiver. 展开更多
关键词 Deep learning Optical communications Symbol detection temporal convolutional network
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基于TCN+N-BEATS+MLP的瓦斯体积分数预测方法研究
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作者 金智新 曾庆红 +2 位作者 刘通 王宏伟 李雪靖 《安全与环境学报》 北大核心 2026年第3期953-965,共13页
为提升煤矿安全生产水平,准确预测瓦斯体积分数的变化具有重要意义。针对现有方法预测精度的不足,提出了一种融合时序卷积网络(Temporal Convolutional Network,TCN)、可解释时间序列预测的神经基展开分析(Neural Basis Expansion Analy... 为提升煤矿安全生产水平,准确预测瓦斯体积分数的变化具有重要意义。针对现有方法预测精度的不足,提出了一种融合时序卷积网络(Temporal Convolutional Network,TCN)、可解释时间序列预测的神经基展开分析(Neural Basis Expansion Analysis for Interpretable Time Series Forecasting,N-BEATS)与多层感知机(Multilayer Perceptron,MLP)的瓦斯体积分数多步同时预测方法,并对山西高河煤矿E1306工作面上隅角的瓦斯体积分数数据进行了预测。试验结果表明,TCN+N-BEATS+MLP模型在5 min、15 min和30 min的预测任务中具有较高的预测精度,在均方根误差(E_(RMS))、平均绝对误差(E_(MA))、平均绝对百分比误差(E_(MAP))和拟合优度(R^(2))方面,所提模型均优于其他对比模型,实现了提前30 min的瓦斯体积分数预测。该方法通过TCN提取数据的长时特征,结合N-BEATS建模时间序列的短时趋势,并通过MLP对误差进行修正,提升了对瓦斯体积分数预测结果的准确性,对预防煤矿瓦斯灾害具有指导意义。 展开更多
关键词 安全工程 瓦斯体积分数 时序卷积网络 N-BETAS模型 多层感知机
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基于FC-TCN-GRU模型的凡纳滨对虾养殖水中氨氮和化学需氧量的预测
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作者 王智华 吴昊 +2 位作者 周英娴 李桂娟 江敏 《上海海洋大学学报》 北大核心 2026年第1期105-118,共14页
基于2014—2018年及2021—2024年某水产养殖合作社凡纳滨对虾(Litopenaeus vannamei)养殖池塘的水质检测数据,选取总氮(TN)、总磷(TP)、活性磷(AP)、硝态氮(NO_(3)^(-)-N)、亚硝态氮(NO_(2)^(-)-N)、氨氮(TAN)、化学需氧量(COD)、温度(T... 基于2014—2018年及2021—2024年某水产养殖合作社凡纳滨对虾(Litopenaeus vannamei)养殖池塘的水质检测数据,选取总氮(TN)、总磷(TP)、活性磷(AP)、硝态氮(NO_(3)^(-)-N)、亚硝态氮(NO_(2)^(-)-N)、氨氮(TAN)、化学需氧量(COD)、温度(T)和pH等在内的关键水质参数,构建了基于时域卷积网络(Temporal convolutional network,TCN)和门控循环单元(Gate recurrent unit,GRU)的TAN和COD水质预测模型。首先搭建FC-TCN-GRU的混合模型,即采用TCN对数据特征进行提取和降维处理,再将处理后的数据输入GRU模型,最后通过全连接层(Fully connected layers,FC)映射为预测结果。对搭建好的FC-TCN-GRU模型进行评估,其绝对误差(MAE)、均方误差(MSE)和决定系数(R^(2))在对TAN预测中分别为0.255、0.089和0.861;在对COD的预测中分别为1.750、4.840和0.332。将模型与PCA-LSTM、基本LSTM和基本GRU模型对TAN和COD的预测结果进行比较,结果显示:FC-TCN-GRU模型对TAN和COD指标的预测精度优于其他3种模型,在TAN预测中表现出色,但对COD的预测效果尚有提升空间。 展开更多
关键词 凡纳滨对虾 水质预测 全连接层 门控循环单元 时域卷积网络
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基于聚合模态分解和TCN-BiGRU的光伏功率预测模型
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作者 李梦阳 陈柳 +1 位作者 史蒙 赵玉娇 《太阳能学报》 北大核心 2026年第2期91-99,共9页
针对光伏发电功率随机性强、波动性高导致预测精度低的问题,提出一种基于聚合模态分解(AMD)、时间卷积网络(TCN)和双向门控循环单元(BiGRU)的光伏功率组合预测模型。该模型使用完全自适应噪声集合经验模态分解(CEEMDAN)对原始光伏序列... 针对光伏发电功率随机性强、波动性高导致预测精度低的问题,提出一种基于聚合模态分解(AMD)、时间卷积网络(TCN)和双向门控循环单元(BiGRU)的光伏功率组合预测模型。该模型使用完全自适应噪声集合经验模态分解(CEEMDAN)对原始光伏序列进行处理,得到多个频率不同的子序列,通过样本熵(SE)对子序列进行区分,保留含信号的低频、中频分量。将CEEMDAN分解得到的高频分量用逐次变分模态分解(SVMD)进行二次分解,降低序列不平稳度。最后,构建不同分量的TCN-BiGRU网络模型,得到各分量的预测值进行加和后输出最终预测结果。通过算例分析进行实验表明,对比其他模型,所提出的组合预测模型在光伏发电功率预测中具有较高的预测精度和稳定性。 展开更多
关键词 光伏功率 预测模型 信号处理 聚合模态分解 时间卷积网络 双向门控循环单元
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基于自注意力和TCN的时间序列异常检测
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作者 魏月艳 凌捷 《计算机工程与设计》 北大核心 2026年第1期210-216,共7页
为了提高多元时间序列异常检测模型捕获时序依赖关系的能力和抗干扰性,提出了一种基于Transformer和时间卷积神经网络的多元时间序列异常检测方法(TC-TAD)。对原始时间序列进行时域扩增,增强数据的多样性。结合Transformer和TCN动态学... 为了提高多元时间序列异常检测模型捕获时序依赖关系的能力和抗干扰性,提出了一种基于Transformer和时间卷积神经网络的多元时间序列异常检测方法(TC-TAD)。对原始时间序列进行时域扩增,增强数据的多样性。结合Transformer和TCN动态学习时间序列的全局特征和局部特征,并基于学习到的特征对时间序列进行重构,根据重构误差判断时间序列数据的异常情况。实验结果表明,所提出的方法能够捕获时间序列之间的依赖关系,具备良好的抗干扰性,实现了更高的异常检测准确率。 展开更多
关键词 异常检测 时间序列 自注意力机制 时间卷积神经网络 时域扩增 对抗式训练 迭代自调节
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基于SSA-VMD预处理的TCN-Informer短期风速多步预测混合模型
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作者 孔宪正 黄国勇 +1 位作者 邓为权 刘发炳 《太阳能学报》 北大核心 2026年第2期527-538,共12页
针对传统风速预测方法多步预测准确性不足的问题,提出一种基于奇异谱分析和变分模态分解预处理的时间卷积网络-Informer混合预测模型。首先,利用奇异谱分析抑制原始风速中的噪声,降低风速的不稳定性;然后,利用变分模态分解降低风速序列... 针对传统风速预测方法多步预测准确性不足的问题,提出一种基于奇异谱分析和变分模态分解预处理的时间卷积网络-Informer混合预测模型。首先,利用奇异谱分析抑制原始风速中的噪声,降低风速的不稳定性;然后,利用变分模态分解降低风速序列的复杂度,并将各分量分别输入到时间卷积网络提取时间特征以加强局部信息的捕捉;最后,将各模态分量及其时空特征进行融合,输入到Informer自注意力模型对其长时间依赖关系进行建模,得到多步风速预测结果。以云南某风电场测风塔实测风速为验证,该模型在6步和12步预测上MAPE分别仅为1.63%和2.25%,进一步提高了短期风速多步预测准确性。 展开更多
关键词 风电 预测 深度学习 奇异谱分析 时间卷积网络 变分模态分解
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高光谱成像结合BiTCN-SA的马铃薯晚疫病早期识别
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作者 罗祖升 刘雨琛 +1 位作者 王晓丹 张巧杰 《山东农业大学学报(自然科学版)》 北大核心 2026年第1期56-65,共10页
及早识别晚疫病是控制马铃薯晚疫病发展的关键,为充分利用高光谱数据波段间特征信息,提高模型对马铃薯晚疫病早期识别的精度,本文提出一种基于双向时间卷积网络(BiTCN)融合自注意力机制(SA)的马铃薯晚疫病早期识别模型(BiTCN-SA)。BiTC... 及早识别晚疫病是控制马铃薯晚疫病发展的关键,为充分利用高光谱数据波段间特征信息,提高模型对马铃薯晚疫病早期识别的精度,本文提出一种基于双向时间卷积网络(BiTCN)融合自注意力机制(SA)的马铃薯晚疫病早期识别模型(BiTCN-SA)。BiTCN通过正向和反向卷积支路捕捉波段间相关性特征,充分利用前后波段的关联性;自注意力机制动态分配不同波段的重要性权重,提高关键波段对模型分类的贡献度。BiTCN-SA模型将自注意力与BiTCN相融合,在双向上实现局部卷积特征与全局注意力权重的结合,实现双重特征提取,提高模型识别精度。采集3个等级(健康、无症状期、症状初期)的叶片高光谱数据并建模分析,通过对比SVM、RF等机器学习方法和CNN、LSTM、TCN、BiTCN等深度学习方法,以验证本文模型优越性。结果表明,BiTCN-SA模型的收敛速度比单一TCN和BiTCN更快,且模型精度显著提高,比其他机器学习和深度学习方法,具备更强大的特征提取能力,总体准确率达到98%,且对无症状期的病叶识别率达到96%。该方法充分利用高光谱波段间的深层信息,且模型识别率相比于其他机器学习和深度学习方法有大幅提高,为马铃薯晚疫病早期预警和防治提供技术支持。 展开更多
关键词 马铃薯晚疫病 高光谱成像 早期识别 双向时间卷积网络 自注意力机制 特征提取
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Classification of EEG signals in depression by fusing temporal convolution and feature recalibration
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作者 SUN Fanglin ZHAI Fengwen JIN Jing 《Journal of Measurement Science and Instrumentation》 2025年第4期547-557,共11页
Aiming at the problem of insufficient feature extraction in single scale neural network model and the problem that convolutional neural network cannot process sequential tasks in the classification of EEG signals in d... Aiming at the problem of insufficient feature extraction in single scale neural network model and the problem that convolutional neural network cannot process sequential tasks in the classification of EEG signals in depression,a hybrid model(BFTCNet)of dualbranch convolutional neural network(Bi_CNN)and temporal convolutional network(TCN)based on feature recalibration(FR)was proposed to classify EEG signals of depressed patients and healthy controls.Firstly,Bi_CNN module was used to extract the mixed EEG features between different frequency bands and different channels.Secondly,FR module was used to enhance the features extracted by Bi_CNN.Finally,TCN with dilated causal convolution was used for the sequence learning to capture the temporal dependency between features.In this study,128 EEG channels of resting-state(closed-eye)EEG data from the public dataset MODMA were used as experimental data,including 29 healthy controls and 24 depression patients.The performance of the model was evaluated by the 10-fold cross validation method.The proposed BFTCNet achieves a classification accuracy of 95.98%,F1 score value of 95.47%,sensitivity and specificity of 94.21%and 97.50%,respectively.Compared with the single-scale network model EEGNet-8,2,the classification accuracy and F1 value are improved by 1.5%and 1.48%,respectively.Meanwhile,the ablation experiment proved that each sub-module had its contribution to the improvement of the model’s classification ability. 展开更多
关键词 multi-channel EEG signal dual-branch convolutional neural network feature recalibration temporal convolutional network
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