期刊文献+
共找到379篇文章
< 1 2 19 >
每页显示 20 50 100
Research of Energy-saving Control of Oil-well Power Heater Based on RNN Neural Network
1
作者 SUN Jingen YANG Yang 《沈阳理工大学学报》 CAS 2014年第4期87-94,共8页
For the beam pumping unit,the power consumption of oil-well power heater accounts for a large part of the pumping unit.Decreasing the energy consumption of the power heater is an important approach to reduce that of t... For the beam pumping unit,the power consumption of oil-well power heater accounts for a large part of the pumping unit.Decreasing the energy consumption of the power heater is an important approach to reduce that of the pumping unit.To decrease the energy consumption of oil-well power heater,the proper control method is needed.Based on summarizing the existing control method of power heater,a control method of oil-well power heater of beam pumping unit based on RNN neural network is proposed.The method is forecasting the polished rod load of the beam pumping unit through RNN neural network and using the polished rod load for real-time closed-loop control of the power heater,which adjusts average output power,so as to decrease the power consumption.The experimental data show that the control method is entirely feasible.It not only ensures the oil production,but also improves the energy-saving effect of the pumping unit. 展开更多
关键词 rnn neural network oil-wells power heating ENERGY-SAVING
在线阅读 下载PDF
Effects of data smoothing and recurrent neural network(RNN)algorithms for real-time forecasting of tunnel boring machine(TBM)performance 被引量:1
2
作者 Feng Shan Xuzhen He +1 位作者 Danial Jahed Armaghani Daichao Sheng 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2024年第5期1538-1551,共14页
Tunnel boring machines(TBMs)have been widely utilised in tunnel construction due to their high efficiency and reliability.Accurately predicting TBM performance can improve project time management,cost control,and risk... Tunnel boring machines(TBMs)have been widely utilised in tunnel construction due to their high efficiency and reliability.Accurately predicting TBM performance can improve project time management,cost control,and risk management.This study aims to use deep learning to develop real-time models for predicting the penetration rate(PR).The models are built using data from the Changsha metro project,and their performances are evaluated using unseen data from the Zhengzhou Metro project.In one-step forecast,the predicted penetration rate follows the trend of the measured penetration rate in both training and testing.The autoregressive integrated moving average(ARIMA)model is compared with the recurrent neural network(RNN)model.The results show that univariate models,which only consider historical penetration rate itself,perform better than multivariate models that take into account multiple geological and operational parameters(GEO and OP).Next,an RNN variant combining time series of penetration rate with the last-step geological and operational parameters is developed,and it performs better than other models.A sensitivity analysis shows that the penetration rate is the most important parameter,while other parameters have a smaller impact on time series forecasting.It is also found that smoothed data are easier to predict with high accuracy.Nevertheless,over-simplified data can lose real characteristics in time series.In conclusion,the RNN variant can accurately predict the next-step penetration rate,and data smoothing is crucial in time series forecasting.This study provides practical guidance for TBM performance forecasting in practical engineering. 展开更多
关键词 Tunnel boring machine(TBM) Penetration rate(PR) Time series forecasting Recurrent neural network(rnn)
在线阅读 下载PDF
Optimizing the Clinical Decision Support System (CDSS) by Using Recurrent Neural Network (RNN) Language Models for Real-Time Medical Query Processing
3
作者 Israa Ibraheem Al Barazanchi Wahidah Hashim +4 位作者 Reema Thabit Mashary Nawwaf Alrasheedy Abeer Aljohan Jongwoon Park Byoungchol Chang 《Computers, Materials & Continua》 SCIE EI 2024年第12期4787-4832,共46页
This research aims to enhance Clinical Decision Support Systems(CDSS)within Wireless Body Area Networks(WBANs)by leveraging advanced machine learning techniques.Specifically,we target the challenges of accurate diagno... This research aims to enhance Clinical Decision Support Systems(CDSS)within Wireless Body Area Networks(WBANs)by leveraging advanced machine learning techniques.Specifically,we target the challenges of accurate diagnosis in medical imaging and sequential data analysis using Recurrent Neural Networks(RNNs)with Long Short-Term Memory(LSTM)layers and echo state cells.These models are tailored to improve diagnostic precision,particularly for conditions like rotator cuff tears in osteoporosis patients and gastrointestinal diseases.Traditional diagnostic methods and existing CDSS frameworks often fall short in managing complex,sequential medical data,struggling with long-term dependencies and data imbalances,resulting in suboptimal accuracy and delayed decisions.Our goal is to develop Artificial Intelligence(AI)models that address these shortcomings,offering robust,real-time diagnostic support.We propose a hybrid RNN model that integrates SimpleRNN,LSTM layers,and echo state cells to manage long-term dependencies effectively.Additionally,we introduce CG-Net,a novel Convolutional Neural Network(CNN)framework for gastrointestinal disease classification,which outperforms traditional CNN models.We further enhance model performance through data augmentation and transfer learning,improving generalization and robustness against data scarcity and imbalance.Comprehensive validation,including 5-fold cross-validation and metrics such as accuracy,precision,recall,F1-score,and Area Under the Curve(AUC),confirms the models’reliability.Moreover,SHapley Additive exPlanations(SHAP)and Local Interpretable Model-agnostic Explanations(LIME)are employed to improve model interpretability.Our findings show that the proposed models significantly enhance diagnostic accuracy and efficiency,offering substantial advancements in WBANs and CDSS. 展开更多
关键词 Computer science clinical decision support system(CDSS) medical queries healthcare deep learning recurrent neural network(rnn) long short-term memory(LSTM)
在线阅读 下载PDF
基于小波包变换和Replicator Neural Network的单位置结构损伤检测 被引量:1
4
作者 张祥 陈仁文 《机械强度》 CAS CSCD 北大核心 2020年第3期509-515,共7页
为了实现对结构的损伤检测,提出一种基于小波包变换和Replicator Neural Network(RNN)的单位置结构损伤检测方法。首先采用小波包变换对原始振动响应信号进行分解,计算分解得到的各频带的相对频带能量,这些相对频带能量的分布反映了结... 为了实现对结构的损伤检测,提出一种基于小波包变换和Replicator Neural Network(RNN)的单位置结构损伤检测方法。首先采用小波包变换对原始振动响应信号进行分解,计算分解得到的各频带的相对频带能量,这些相对频带能量的分布反映了结构特性。然后,将健康结构的相对频带能量作为输入训练RNN。最后,利用训练后的网络即可对结构进行实时损伤检测。实验表明,即使在有噪声干扰下,该方法仍然能够检测出结构是否存在损伤。 展开更多
关键词 Replicator neural network 小波包变换 相对频带能量 结构损伤检测
在线阅读 下载PDF
Remaining Useful Life Prediction for a Roller in a Hot Strip Mill Based on Deep Recurrent Neural Networks 被引量:11
5
作者 Ruihua Jiao Kaixiang Peng Jie Dong 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2021年第7期1345-1354,共10页
Accurate estimation of the remaining useful life(RUL)and health state for rollers is of great significance to hot rolling production.It can provide decision support for roller management so as to improve the productiv... Accurate estimation of the remaining useful life(RUL)and health state for rollers is of great significance to hot rolling production.It can provide decision support for roller management so as to improve the productivity of the hot rolling process.In addition,the RUL prediction for rollers is helpful in transitioning from the current regular maintenance strategy to conditional-based maintenance.Therefore,a new method that can extract coarse-grained and fine-grained features from batch data to predict the RUL of the rollers is proposed in this paper.Firstly,a new deep learning network architecture based on recurrent neural networks that can make full use of the extracted coarsegrained fine-grained features to estimate the heath indicator(HI)is developed,where the HI is able to indicate the health state of the roller.Following that,a state-space model is constructed to describe the HI,and the probabilistic distribution of RUL can be estimated by extrapolating the HI degradation model to a predefined failure threshold.Finally,application to a hot strip mill is given to verify the effectiveness of the proposed methods using data collected from an industrial site,and the relatively low RMSE and MAE values demonstrate its advantages compared with some other popular deep learning methods. 展开更多
关键词 Hot strip mill prognostics and health management(PHM) recurrent neural network(rnn) remaining useful life(RUL) roller management.
在线阅读 下载PDF
New Stability Criteria for Recurrent Neural Networks with a Time-varying Delay 被引量:2
6
作者 Hong-Bing Zeng Shen-Ping Xiao Bin Liu 《International Journal of Automation and computing》 EI 2011年第1期128-133,共6页
This paper deals with the stability of static recurrent neural networks (RNNs) with a time-varying delay. An augmented Lyapunov-Krasovskii functional is employed, in which some useful terms are included. Furthermore... This paper deals with the stability of static recurrent neural networks (RNNs) with a time-varying delay. An augmented Lyapunov-Krasovskii functional is employed, in which some useful terms are included. Furthermore, the relationship among the timevarying delay, its upper bound and their difierence, is taken into account, and novel bounding techniques for 1- τ(t) are employed. As a result, without ignoring any useful term in the derivative of the Lyapunov-Krasovskii functional, the resulting delay-dependent criteria show less conservative than the existing ones. Finally, a numerical example is given to demonstrate the effectiveness of the proposed methods. 展开更多
关键词 STABILITY recurrent neural networks rnns) time-varying delay DELAY-DEPENDENT augmented Lyapunov-Krasovskii functional.
在线阅读 下载PDF
Multimodal emotion recognition based on deep neural network 被引量:2
7
作者 Ye Jiayin Zheng Wenming +2 位作者 Li Yang Cai Youyi Cui Zhen 《Journal of Southeast University(English Edition)》 EI CAS 2017年第4期444-447,共4页
In order to increase the accuracy rate of emotion recognition in voiceand video,the mixed convolutional neural network(CNN)and recurrent neural network(RNN)ae used to encode and integrate the two information sources.F... In order to increase the accuracy rate of emotion recognition in voiceand video,the mixed convolutional neural network(CNN)and recurrent neural network(RNN)ae used to encode and integrate the two information sources.For the audio signals,several frequency bands as well as some energy functions are extacted as low-level features by using a sophisticated audio technique,and then they are encoded w it a one-dimensional(I D)convolutional neural network to abstact high-level features.Finally,tiese are fed into a recurrent neural network for te sake of capturing dynamic tone changes in a temporal dimensionality.As a contrast,a two-dimensional(2D)convolutional neural network and a similar RNN are used to capture dynamic facial appearance changes of temporal sequences.The method was used in te Chinese Natral Audio-'Visual Emotion Database in te Chinese Conference on Pattern Recognition(CCPR)in2016.Experimental results demonstrate that te classification average precision of the proposed metiod is41.15%,which is increased by16.62%compaed with te baseline algorithm offered by the CCPR in2016.It is proved ta t te proposed method has higher accuracy in te identification of emotional information. 展开更多
关键词 emotion recognition convolutional neural network ( CNN) recurrent neural networks ( rnn)
在线阅读 下载PDF
Robust exponential stability analysis of a larger class of discrete-time recurrent neural networks 被引量:1
8
作者 ZHANG Jian-hai ZHANG Sen-lin LIU Mei-qin 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第12期1912-1920,共9页
The robust exponential stability of a larger class of discrete-time recurrent neural networks (RNNs) is explored in this paper. A novel neural network model, named standard neural network model (SNNM), is introduced t... The robust exponential stability of a larger class of discrete-time recurrent neural networks (RNNs) is explored in this paper. A novel neural network model, named standard neural network model (SNNM), is introduced to provide a general framework for stability analysis of RNNs. Most of the existing RNNs can be transformed into SNNMs to be analyzed in a unified way. Applying Lyapunov stability theory method and S-Procedure technique, two useful criteria of robust exponential stability for the discrete-time SNNMs are derived. The conditions presented are formulated as linear matrix inequalities (LMIs) to be easily solved using existing efficient convex optimization techniques. An example is presented to demonstrate the transformation procedure and the effectiveness of the results. 展开更多
关键词 Standard neural network model (SNNM) Robust exponential stability Recurrent neural networks rnns) DISCRETE-TIME Time-delay system Linear matrix inequality (LMI)
在线阅读 下载PDF
Global stability of interval recurrent neural networks 被引量:1
9
作者 袁铸钢 刘志远 +1 位作者 裴润 申涛 《Journal of Beijing Institute of Technology》 EI CAS 2012年第3期382-386,共5页
The robust global exponential stability of a class of interval recurrent neural networks(RNNs) is studied,and a new robust stability criterion is obtained in the form of linear matrix inequality.The problem of robus... The robust global exponential stability of a class of interval recurrent neural networks(RNNs) is studied,and a new robust stability criterion is obtained in the form of linear matrix inequality.The problem of robust stability of interval RNNs is transformed into a problem of solving a class of linear matrix inequalities.Thus,the robust stability of interval RNNs can be analyzed by directly using the linear matrix inequalities(LMI) toolbox of MATLAB.Numerical example is given to show the effectiveness of the obtained results. 展开更多
关键词 recurrent neural networks(rnns) interval systems linear matrix inequalities(LMI) global exponential stability
在线阅读 下载PDF
Hyperparameter Tuning for Deep Neural Networks Based Optimization Algorithm 被引量:3
10
作者 D.Vidyabharathi V.Mohanraj 《Intelligent Automation & Soft Computing》 SCIE 2023年第6期2559-2573,共15页
For training the present Neural Network(NN)models,the standard technique is to utilize decaying Learning Rates(LR).While the majority of these techniques commence with a large LR,they will decay multiple times over ti... For training the present Neural Network(NN)models,the standard technique is to utilize decaying Learning Rates(LR).While the majority of these techniques commence with a large LR,they will decay multiple times over time.Decaying has been proved to enhance generalization as well as optimization.Other parameters,such as the network’s size,the number of hidden layers,drop-outs to avoid overfitting,batch size,and so on,are solely based on heuristics.This work has proposed Adaptive Teaching Learning Based(ATLB)Heuristic to identify the optimal hyperparameters for diverse networks.Here we consider three architec-tures Recurrent Neural Networks(RNN),Long Short Term Memory(LSTM),Bidirectional Long Short Term Memory(BiLSTM)of Deep Neural Networks for classification.The evaluation of the proposed ATLB is done through the various learning rate schedulers Cyclical Learning Rate(CLR),Hyperbolic Tangent Decay(HTD),and Toggle between Hyperbolic Tangent Decay and Triangular mode with Restarts(T-HTR)techniques.Experimental results have shown the performance improvement on the 20Newsgroup,Reuters Newswire and IMDB dataset. 展开更多
关键词 Deep learning deep neural network(DNN) learning rates(LR) recurrent neural network(rnn) cyclical learning rate(CLR) hyperbolic tangent decay(HTD) toggle between hyperbolic tangent decay and triangular mode with restarts(T-HTR) teaching learning based optimization(TLBO)
在线阅读 下载PDF
融合RNN与稀疏自注意力的文本摘要方法 被引量:2
11
作者 刘钟 唐宏 +1 位作者 王宁喆 朱传润 《计算机工程》 北大核心 2025年第1期312-320,共9页
随着深度学习的高速发展,基于序列到序列(Seq2Seq)架构的文本摘要方法成为研究焦点,但现有大多数文本摘要模型受限于长期依赖,忽略了注意力机制复杂度以及词序信息对文本摘要生成的影响,生成的摘要丢失关键信息,偏离原文内容与意图,影... 随着深度学习的高速发展,基于序列到序列(Seq2Seq)架构的文本摘要方法成为研究焦点,但现有大多数文本摘要模型受限于长期依赖,忽略了注意力机制复杂度以及词序信息对文本摘要生成的影响,生成的摘要丢失关键信息,偏离原文内容与意图,影响用户体验。为了解决上述问题,提出一种基于Transformer改进的融合递归神经网络(RNN)与稀疏自注意力的文本摘要方法。首先采用窗口RNN模块,将输入文本按窗口划分,每个RNN对窗口内词序信息进行压缩,并通过窗口级别的表示整合为整个文本的表示,进而增强模型捕获局部依赖的能力;其次采用基于递归循环机制的缓存模块,循环缓存上一文本片段的信息到当前片段,允许模型更好地捕获长期依赖和全局信息;最后采用稀疏自注意力模块,通过块稀疏矩阵对注意力矩阵按块划分,关注并筛选出重要令牌对,而不是在所有令牌对上平均分配注意力,从而降低注意力的时间复杂度,提高长文本摘要任务的效率。实验结果表明,该方法在数据集text8、enwik8上的BPC分数相比于LoBART模型降低了0.02,在数据集wikitext-103以及ptb上的PPL分数相比于LoBART模型分别降低了1.0以上,验证了该方法的可行性与有效性。 展开更多
关键词 序列到序列架构 文本摘要 Transformer模型 递归神经网络 递归循环机制 稀疏自注意力机制
在线阅读 下载PDF
Optimized Phishing Detection with Recurrent Neural Network and Whale Optimizer Algorithm
12
作者 Brij Bhooshan Gupta Akshat Gaurav +3 位作者 Razaz Waheeb Attar Varsha Arya Ahmed Alhomoud Kwok Tai Chui 《Computers, Materials & Continua》 SCIE EI 2024年第9期4895-4916,共22页
Phishing attacks present a persistent and evolving threat in the cybersecurity land-scape,necessitating the development of more sophisticated detection methods.Traditional machine learning approaches to phishing detec... Phishing attacks present a persistent and evolving threat in the cybersecurity land-scape,necessitating the development of more sophisticated detection methods.Traditional machine learning approaches to phishing detection have relied heavily on feature engineering and have often fallen short in adapting to the dynamically changing patterns of phishingUniformResource Locator(URLs).Addressing these challenge,we introduce a framework that integrates the sequential data processing strengths of a Recurrent Neural Network(RNN)with the hyperparameter optimization prowess of theWhale Optimization Algorithm(WOA).Ourmodel capitalizes on an extensive Kaggle dataset,featuring over 11,000 URLs,each delineated by 30 attributes.The WOA’s hyperparameter optimization enhances the RNN’s performance,evidenced by a meticulous validation process.The results,encapsulated in precision,recall,and F1-score metrics,surpass baseline models,achieving an overall accuracy of 92%.This study not only demonstrates the RNN’s proficiency in learning complex patterns but also underscores the WOA’s effectiveness in refining machine learning models for the critical task of phishing detection. 展开更多
关键词 Phishing detection Recurrent neural network(rnn) Whale Optimization Algorithm(WOA) CYBERSECURITY machine learning optimization
在线阅读 下载PDF
ENDPOINT DETECTOR OF NOISY SPEECH SIGNAL USING A RECURRENT NEURAL NETWORK
13
作者 韦晓东 胡光锐 《Journal of Shanghai Jiaotong university(Science)》 EI 1999年第1期60-63,共4页
IntroductionEndpointdetectionofspeechsignalisimportantinmanyareasofspeechprocessingtechnology,suchasspeechen... IntroductionEndpointdetectionofspeechsignalisimportantinmanyareasofspeechprocessingtechnology,suchasspeechenhancement,speechr... 展开更多
关键词 SPEECH ENDPOINT detection RECURRENT neural network(rnn) immunity learning
在线阅读 下载PDF
A Prediction Method of Trend-Type Capacity Index Based on Recurrent Neural Network
14
作者 Wenxiao Wang Xiaoyu Li +2 位作者 Yin Ding Feizhou Wu Shan Yang 《Journal of Quantum Computing》 2021年第1期25-33,共9页
Due to the increase in the types of business and equipment in telecommunications companies,the performance index data collected in the operation and maintenance process varies greatly.The diversity of index data makes... Due to the increase in the types of business and equipment in telecommunications companies,the performance index data collected in the operation and maintenance process varies greatly.The diversity of index data makes it very difficult to perform high-precision capacity prediction.In order to improve the forecasting efficiency of related indexes,this paper designs a classification method of capacity index data,which divides the capacity index data into trend type,periodic type and irregular type.Then for the prediction of trend data,it proposes a capacity index prediction model based on Recurrent Neural Network(RNN),denoted as RNN-LSTM-LSTM.This model includes a basic RNN,two Long Short-Term Memory(LSTM)networks and two Fully Connected layers.The experimental results show that,compared with the traditional Holt-Winters,Autoregressive Integrated Moving Average(ARIMA)and Back Propagation(BP)neural network prediction model,the mean square error(MSE)of the proposed RNN-LSTM-LSTM model are reduced by 11.82%and 20.34%on the order storage and data migration,which has greatly improved the efficiency of trend-type capacity index prediction. 展开更多
关键词 Recurrent neural network(rnn) Long Short-Term Memory(LSTM)network capacity prediction
在线阅读 下载PDF
基于RNN的FMEA核磁共振设备故障检修方法
15
作者 卢志高 朱祺 《中国医疗设备》 2025年第11期187-192,共6页
目的 对核磁共振设备故障进行准确诊断,并提供合理的维修方法。方法 将大数据分析与循环神经网络(Recurrent Neural Network,RNN)和失效模式及影响分析(Failure Mode and Effects Analysis,FMEA)方法进行结合,并基于结合后的方法提出一... 目的 对核磁共振设备故障进行准确诊断,并提供合理的维修方法。方法 将大数据分析与循环神经网络(Recurrent Neural Network,RNN)和失效模式及影响分析(Failure Mode and Effects Analysis,FMEA)方法进行结合,并基于结合后的方法提出一种核磁共振设备故障检修技术。为验证该技术的有效性,利用该技术对医院中的核磁共振设备进行检修。结果 该技术对核磁共振设备进行故障检修时,对设备各个部分的故障检测准确率均可达95%以上,且检测耗时均低于5.0 s。使用该检修技术后,核磁共振设备运行会更加稳定,且利用该检修技术对设备故障进行检修,发现修复率可达99.7%。故障修复后,使用寿命延长了86.8%。结论 本研究提出的基于RNN-FMEA方法的核磁共振故障检修技术能够提高故障检测准确率,从而提高故障检修效率,提高医学诊断水平。 展开更多
关键词 核磁共振设备 故障检修 失效模式和影响分析(FMEA) 设备使用寿命 循环神经网络(rnn)
暂未订购
基于RNN的倾转四旋翼无人机滑模控制
16
作者 李晨 熊晶晶 《控制工程》 北大核心 2025年第5期866-873,共8页
针对倾转四旋翼无人机处于不同倾转角的固定翼模式以及直升机模式下的位姿跟踪控制,提出一种基于循环神经网络(recurrentneuralnetwork,RNN)的自适应滑模控制策略。首先,将四旋翼动力学模型分为全驱动和欠驱动2个子系统。鉴于无人机存... 针对倾转四旋翼无人机处于不同倾转角的固定翼模式以及直升机模式下的位姿跟踪控制,提出一种基于循环神经网络(recurrentneuralnetwork,RNN)的自适应滑模控制策略。首先,将四旋翼动力学模型分为全驱动和欠驱动2个子系统。鉴于无人机存在模型参数的不确定性和外部扰动,通过循环神经网络对等效控制器进行估算,以解决使用滑模控制方法得到的等效控制器不能直接应用于无人机的问题。然后,为保证控制系统的稳定性,并削弱控制器的抖振,设计了新的切换控制器。根据Lyapunov理论,2个子系统均能到达滑模面。最后,通过对比仿真验证了所提方法的有效性。 展开更多
关键词 倾转四旋翼无人机 循环神经网络 自适应控制 滑模控制
原文传递
基于改进RNN元启发式的RRT冗余机械臂路径规划
17
作者 胡江瑜 马珺杰 +1 位作者 李展 黄德青 《现代制造工程》 北大核心 2025年第9期41-52,共12页
为满足铁路接触网腕臂智能检修作业中机械臂自动导航需求,提出一种综合解决路径规划和障碍物避让问题的研究方法。该方法将双重目标转化为单一的约束优化问题。在此基础上,对标准快速搜索随机树(Rapidly exploring Random Tree,RRT)算... 为满足铁路接触网腕臂智能检修作业中机械臂自动导航需求,提出一种综合解决路径规划和障碍物避让问题的研究方法。该方法将双重目标转化为单一的约束优化问题。在此基础上,对标准快速搜索随机树(Rapidly exploring Random Tree,RRT)算法进行改进,引入地图复杂程度评估策略和高斯混合分布采样策略,以约束随机采样点的生成方向。通过加入角度约束策略和临近障碍物的变步长机制,确保随机树始终向目标点方向生长,从而规划出渐进最优的路径。此外,设计一种基于甲虫嗅觉探测的递归神经网络(Recurrent Neural Network based on Beetle Olfactory Detection,RNNBOD)算法,配置最优关节角度,驱动冗余机械臂末端执行器沿规划的参考路径移动,从而降低其计算成本。仿真结果表明,该方法不仅有效提升了标准RRT算法的搜索效率、节点利用率和路径质量,还成功解决了冗余机械臂在运行过程中的跟踪控制难题。 展开更多
关键词 接触网检修 路径规划 避障 递归神经网络算法 跟踪控制
在线阅读 下载PDF
基于多特征融合与双向RNN的细粒度意见分析 被引量:19
18
作者 郝志峰 黄浩 +1 位作者 蔡瑞初 温雯 《计算机工程》 CAS CSCD 北大核心 2018年第7期199-204,211,共7页
文本细粒度意见分析主要有属性抽取和基于属性的情感分类2个任务,现有方法完成上述任务采用条件随机场(CRF)训练属性抽取模型,并运用循环神经网络(RNN)训练基于属性的情感分类模型。但同时完成2个任务则无法找到属性和情感倾向的对应关... 文本细粒度意见分析主要有属性抽取和基于属性的情感分类2个任务,现有方法完成上述任务采用条件随机场(CRF)训练属性抽取模型,并运用循环神经网络(RNN)训练基于属性的情感分类模型。但同时完成2个任务则无法找到属性和情感倾向的对应关系。针对该问题,提出利用双向RNN构建基于序列标注的细粒度意见分析模型。通过融合文本的词向量、词性和依存关系等语言学特征,学习文本的修饰和语义信息,并设计一个时间序列标注模型,同时抽取属性实体判断文本的情感极性。在真实数据集上的实验结果表明,与CRF、TD-LSTM、AELSTM等模型相比,该模型情感分类效果提升明显。 展开更多
关键词 特征融合 词向量 循环神经网络 属性抽取 细粒度意见分析
在线阅读 下载PDF
基于SVM与RNN的文本情感关键句判定与抽取 被引量:8
19
作者 刘铭 昝红英 原慧斌 《山东大学学报(理学版)》 CAS CSCD 北大核心 2014年第11期68-73,共6页
文本的情感倾向在很大程度上依赖于其中情感倾向性较高的关键句,对这些情感关键句正确判定有利于提高整个篇章情感分类的效果。传统的基于规则的情感倾向性分析的优点是情感词表和规则表达准确,缺点是完备性差,而统计的方法则相反。结... 文本的情感倾向在很大程度上依赖于其中情感倾向性较高的关键句,对这些情感关键句正确判定有利于提高整个篇章情感分类的效果。传统的基于规则的情感倾向性分析的优点是情感词表和规则表达准确,缺点是完备性差,而统计的方法则相反。结合使用支持向量机(support vector machine,SVM)与递归神经网络(recursive neural netw ork,RNN)分别构造分类器,然后对整个篇章和单个句子进行情感二元分类,将分类结果进行比较投票后判定出篇章中的情感关键句。句子级情感特征不仅包含情感词、否定词等传统的文法信息,同时加入深度学习领域中词向量的统计信息,而在篇章特征中也抽取出句型、位置等宏观信息。通过参与COAE 2014评测任务1的结果显示,该方法的微平均F1值达到0.388,在同类评测系统中处于最高水平。 展开更多
关键词 情感倾向性 递归神经网络 深度学习 机器学习
原文传递
基于RNN的中文二分结构句法分析 被引量:17
20
作者 谷波 王瑞波 +1 位作者 李济洪 李国臣 《中文信息学报》 CSCD 北大核心 2019年第1期35-45,共11页
为了构建一个简单易扩展的中文句法分析器,我们依据朱德熙和陆俭明先生的中文二分结构的层次分析句法理论,手工构建了一个3万句的二分结构的中文句法树库,并使用哈夫曼编码方式来简化表示完全二叉树的层次结构。该文将中文句法分析转换... 为了构建一个简单易扩展的中文句法分析器,我们依据朱德熙和陆俭明先生的中文二分结构的层次分析句法理论,手工构建了一个3万句的二分结构的中文句法树库,并使用哈夫曼编码方式来简化表示完全二叉树的层次结构。该文将中文句法分析转换为迭代二分的序列标注问题,并根据该任务的特点,提出了在词的间隔上进行标记的序列标注模型(RNN-Interval,RNN-INT),与常用的循环神经网络模型(RNN,LSTM)和条件随机场模型(CRF)进行对比实验,使用mx2交叉验证序贯t-检验来比较模型。实验结果表明,RNN-INT模型在窗口为1的词特征就可达到最好的性能,并好于其他窗口大小和其他序列标注模型(RNN,LSTM,CRF)。最后,在测试集上,在人工分词下,RNN-INT在短语级别的F1值(块F1)达到71.25%,在句子级别的准确率达到约43%。 展开更多
关键词 层次句法分析 循环神经网络(rnn) m×2CV序贯t-检验
在线阅读 下载PDF
上一页 1 2 19 下一页 到第
使用帮助 返回顶部