Computational Intelligence最新文献_第10页

ResNLS: An improved model for stock price forecasting ResNLS：改进的股票价格预测模型

IF 2.8 4区计算机科学

Computational Intelligence Pub Date : 2023-11-12 DOI: 10.1111/coin.12608

Yuanzhe Jia, Ali Anaissi, Basem Suleiman

{"title":"ResNLS: An improved model for stock price forecasting","authors":"Yuanzhe Jia, Ali Anaissi, Basem Suleiman","doi":"10.1111/coin.12608","DOIUrl":"10.1111/coin.12608","url":null,"abstract":"Stock prices forecasting has always been a challenging task. Although many research projects adopt machine learning and deep learning algorithms to address the problem, few of them pay attention to the varying degrees of dependencies between stock prices. In this paper we introduce a hybrid model that improves stock price prediction by emphasizing the dependencies between adjacent stock prices. The proposed model, ResNLS, is mainly composed of two neural architectures, ResNet and LSTM. ResNet serves as a feature extractor to identify dependencies between stock prices across time windows, while LSTM analyses the initial time-series data with the combination of dependencies which considered as residuals. In predicting the SSE Composite Index, our experiment reveals that when the closing price data for the previous five consecutive trading days is used as the input, the performance of the model (ResNLS-5) is optimal compared to those with other inputs. Furthermore, ResNLS-5 outperforms vanilla CNN, RNN, LSTM, and BiLSTM models in terms of prediction accuracy. It also demonstrates at least a 20% improvement over the current state-of-the-art baselines. To verify whether ResNLS-5 can help clients effectively avoid risks and earn profits in the stock market, we construct a quantitative trading framework for back testing. The experimental results show that the trading strategy based on predictions from ResNLS-5 can successfully mitigate losses during declining stock prices and generate profits in the periods of rising stock prices.","PeriodicalId":55228,"journal":{"name":"Computational Intelligence","volume":"40 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/coin.12608","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135037642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cache-aided UAV-assisted relaying networks: Performance analysis and system optimization 缓存辅助无人机中继网络：性能分析与系统优化

IF 2.8 4区计算机科学

Computational Intelligence Pub Date : 2023-11-06 DOI: 10.1111/coin.12610

Zhe Wang, Chun Yang, Binyu Xie

{"title":"Cache-aided UAV-assisted relaying networks: Performance analysis and system optimization","authors":"Zhe Wang, Chun Yang, Binyu Xie","doi":"10.1111/coin.12610","DOIUrl":"10.1111/coin.12610","url":null,"abstract":"The utilization of distributed multi-agent unmanned aerial vehicles (UAVs) for computing tasks in remote areas has gained significant traction in recent years due to their adaptability and capability to access hard-to-reach regions that are inaccessible to ground-based methods. However, establishing wireless communication between UAVs and ground-based data sources in remote areas presents considerable challenges, particularly when UAVs are in motion. To tackle this challenge, this article investigates a cache-aided relaying system in the presence of UAVs, wherein a ground-based decode-and-forward relay equipped with cache space is deployed to facilitate wireless communication between UAVs and a central data source. Within the scope of this system, we first analyze the probability of transmission outage, providing an analytical expression for performance evaluation. We commence with the case of a single stationary UAV, subsequently expanding to multiple stationary UAVs, and ultimately incorporating multiple dynamic UAVs. Subsequently, we enhance the system performance by minimizing the outage probability through efficient power resource allocation among users. By means of mathematical modeling and simulations, this research examines the influence of various factors, including the cache size at the relay and the working mode of the UAV, on the system performance. Finally, simulations are conducted to validate the proposed analysis.","PeriodicalId":55228,"journal":{"name":"Computational Intelligence","volume":"40 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135683867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A joint hierarchical cross-attention graph convolutional network for multi-modal facial expression recognition 用于多模态面部表情识别的联合分层交叉注意力图卷积网络

IF 2.8 4区计算机科学

Computational Intelligence Pub Date : 2023-10-25 DOI: 10.1111/coin.12607

Chujie Xu, Yong Du, Jingzi Wang, Wenjie Zheng, Tiejun Li, Zhansheng Yuan

{"title":"A joint hierarchical cross-attention graph convolutional network for multi-modal facial expression recognition","authors":"Chujie Xu, Yong Du, Jingzi Wang, Wenjie Zheng, Tiejun Li, Zhansheng Yuan","doi":"10.1111/coin.12607","DOIUrl":"10.1111/coin.12607","url":null,"abstract":"Emotional recognition in conversations (ERC) is increasingly being applied in various IoT devices. Deep learning-based multimodal ERC has achieved great success by leveraging diverse and complementary modalities. Although most existing methods try to adopt attention mechanisms to fuse different information, these methods ignore the complementarity between modalities. To this end, the joint cross-attention model is introduced to alleviate this issue. However, multi-scale feature information on different modalities is not utilized. Moreover, the context relationship plays an important role in feature extraction in the expression recognition task. In this paper, we propose a novel joint hierarchical graph convolution network (JHGCN) which exploits different layer features and context relationships for facial expression recognition based on audio-visual (A-V) information. Specifically, we adopt different deep networks to extract features from different modalities individually. For V modality, we construct V graph data based on patch embeddings which are extracted from the transformer encoder. Moreover, we embed the graph convolution which can leverage the intra-modality relationships with the transformer encoder. Then, the deep feature from different layers is fed to the hierarchical fusion module to enhance feature representation. At last, we use the joint cross-attention mechanism to exploit the complementary inter-modality relationships. To validate the proposed model, we have conducted various experiments on the AffWild2 and CMU-MOSI datasets. All results confirm that our proposed model achieves highly promising performance compared to the joint cross-attention model and other methods.","PeriodicalId":55228,"journal":{"name":"Computational Intelligence","volume":"40 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135112687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Short-term photovoltaic power forecasting using hybrid contrastive learning and temporal convolutional network under future meteorological information absence 在未来气象信息缺失的情况下，利用混合对比学习和时序卷积网络进行短期光伏发电预测

IF 2.8 4区计算机科学

Computational Intelligence Pub Date : 2023-10-24 DOI: 10.1111/coin.12606

Xiaoyang Lu, Yandang Chen, Qibin Li, Pingping Yu

{"title":"Short-term photovoltaic power forecasting using hybrid contrastive learning and temporal convolutional network under future meteorological information absence","authors":"Xiaoyang Lu, Yandang Chen, Qibin Li, Pingping Yu","doi":"10.1111/coin.12606","DOIUrl":"10.1111/coin.12606","url":null,"abstract":"Photovoltaic (PV) power generation is widely utilized to satisfy the increasing energy demand due to its cleanness and inexhaustibility. Accurate PV power forecasting can improve the penetration of PV power in the grid. However, it is pretty challenging to predict PV power in short-term under precious future meteorological information absence conditions. To address this problem, this study proposes the hybrid Contrastive Learning and Temporal Convolutional Network (CL-TCN), and this forecasting approach consists of two parts, including model training and adaptive processes of forecasting models. In the model training stage, this forecasting method firstly trains 18 TCN models for 18 time points from 9:00 a.m. to 17:30 p.m. These TCN models are trained by only using historical PV power data samples, and each model is used to predict the next half-hour power output. The adaptive process of models means that, in a practical forecasting stage, PV power samples from historical data are firstly evaluated and scored by a CL based data scoring mechanism to search for the most similar data samples to current measured samples. Then these similar samples are further applied to training a single above-mentioned well-trained TCN model to improve its performance in forecasting the next half-hour PV power. The experimental results tested at the time resolution of 30 min demonstrate that the proposed approach has superior performance in forecasting accuracy not only in smooth PV power samples but also in fluctuating PV power samples. Moreover, the proposed CL based data scoring mechanism can filter useless data samples effectively accelerating the forecasting process.","PeriodicalId":55228,"journal":{"name":"Computational Intelligence","volume":"40 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135316374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A progressive mesh simplification algorithm based on neural implicit representation 基于神经隐式表示的渐进式网格简化算法

IF 2.8 4区计算机科学

Computational Intelligence Pub Date : 2023-10-12 DOI: 10.1111/coin.12605

Yihua Chen

引用次数: 0

A localization method of manipulator towards achieving more precision control 实现更高精度控制的机械手定位方法

IF 2.8 4区计算机科学

Computational Intelligence Pub Date : 2023-10-02 DOI: 10.1111/coin.12600

Hongwei Gao, Hongyang Zhang, Yueqiu Jiang, Jian Sun, Jiahui Yu

{"title":"A localization method of manipulator towards achieving more precision control","authors":"Hongwei Gao, Hongyang Zhang, Yueqiu Jiang, Jian Sun, Jiahui Yu","doi":"10.1111/coin.12600","DOIUrl":"10.1111/coin.12600","url":null,"abstract":"The monocular vision system is a crucial branch of machine vision research widely used in multiple industries as a research hotspot in the field of vision. Although the monocular vision system is of simple structure and cost-effectiveness, its positioning accuracy is insufficient in some industries. This article researched the robot arm positioning method via monocular vision. First, we built a vision system model and designed the style of a cooperative target for target positioning. Second, a target feature screening method based on conditions is composed for the existence of interference. Furthermore, combining the principle of pose estimation on the PNP (Perspective-n-Point) problem with the results of the visual system calibration to realize the positioning of the target. Finally, complete the construction of the experimental platform and design accuracy evaluation experiments and positioning experiments. The experimental results show that the location measurement error range of the system in this article is below 4 mm, and the measurement error of the rotation angle is below 2<math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mrow></mrow>\u0000 <mrow>\u0000 <mo>∘</mo>\u0000 </mrow>\u0000 </msup>\u0000 </mrow>\u0000 <annotation>$$ {}^{circ } $$</annotation>\u0000 </semantics></math>. The system can adapt to the requirements of general industrial use.","PeriodicalId":55228,"journal":{"name":"Computational Intelligence","volume":"40 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135900101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A semantically enhanced text retrieval framework with abstractive summarization 具有抽象概括功能的语义增强型文本检索框架

IF 2.8 4区计算机科学

Computational Intelligence Pub Date : 2023-09-28 DOI: 10.1111/coin.12603

Min Pan, Teng Li, Yu Liu, Quanli Pei, Ellen Anne Huang, Jimmy X. Huang

{"title":"A semantically enhanced text retrieval framework with abstractive summarization","authors":"Min Pan, Teng Li, Yu Liu, Quanli Pei, Ellen Anne Huang, Jimmy X. Huang","doi":"10.1111/coin.12603","DOIUrl":"10.1111/coin.12603","url":null,"abstract":"Recently, large pretrained language models (PLMs) have led a revolution in the information retrieval community. In most PLMs-based retrieval frameworks, the ranking performance broadly depends on the model structure and the semantic complexity of the input text. Sequence-to-sequence generative models for question answering or text generation have proven to be competitive, so we wonder whether these models can improve ranking effectiveness by enhancing input semantics. This article introduces SE-BERT, a semantically enhanced bidirectional encoder representation from transformers (BERT) based ranking framework that captures more semantic information by modifying the input text. SE-BERT utilizes a pretrained generative language model to summarize both sides of the candidate passage and concatenate them into a new input sequence, allowing BERT to acquire more semantic information within the constraints of the input sequence's length. Experimental results from two Text Retrieval Conference datasets demonstrate that our approach's effectiveness increasing as the length of the input text increases.","PeriodicalId":55228,"journal":{"name":"Computational Intelligence","volume":"40 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/coin.12603","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135424975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Parallel accelerated computing architecture for dim target tracking on-board 用于机载昏暗目标跟踪的并行加速计算架构

IF 2.8 4区计算机科学

Computational Intelligence Pub Date : 2023-09-24 DOI: 10.1111/coin.12604

Jiyang Yu, Dan Huang, Wenjie Li, Xianjie Wang, Xiaolong Shi

{"title":"Parallel accelerated computing architecture for dim target tracking on-board","authors":"Jiyang Yu, Dan Huang, Wenjie Li, Xianjie Wang, Xiaolong Shi","doi":"10.1111/coin.12604","DOIUrl":"10.1111/coin.12604","url":null,"abstract":"The real-time tracking process of dim targets in space is mainly achieved through the correlation and prediction of dots after the detection and calculation process. The on-board calculation of the tracking needs to be completed in milliseconds, and it needs to reach the microsecond level at high frame rates. For real-time tracking of dim targets in space, it is necessary to achieve universal tracking calculation acceleration in response to different space regions and complex backgrounds, which poses high requirements for engineering implementation architecture. This paper designs a Kalman filter calculation based on digital logic parallel acceleration architecture for real-time solution of dim target tracking on-board. A unified architecture of Vector Processing Element (VPE) was established for the calculation of Kalman filtering matrix, and an array computing structure based on VPE was designed to decompose the entire filtering process and form a parallel pipelined data stream. The prediction errors under different fixed point bit widths were analyzed and deduced, and the guidance methods for selecting the optimal bit width based on the statistical results were provided. The entire design was engineered based on Xilinx's XC7K325T, resulting in an energy efficiency improvement compared to previous designs. The single iteration calculation time does not exceed 0.7 microseconds, which can meet the current high frame rate target tracking requirements. The effectiveness of this design has been verified through simulation of random trajectory data, which is consistent with the theoretical calculation error.","PeriodicalId":55228,"journal":{"name":"Computational Intelligence","volume":"40 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135926288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using LSTM neural networks for cross-lingual phonetic speech segmentation with an iterative correction procedure 利用 LSTM 神经网络进行跨语言语音分割，并采用迭代修正程序

IF 2.8 4区计算机科学

Computational Intelligence Pub Date : 2023-09-19 DOI: 10.1111/coin.12602

Zdeněk Hanzlíček, Jindřich Matoušek, Jakub Vít

{"title":"Using LSTM neural networks for cross-lingual phonetic speech segmentation with an iterative correction procedure","authors":"Zdeněk Hanzlíček, Jindřich Matoušek, Jakub Vít","doi":"10.1111/coin.12602","DOIUrl":"10.1111/coin.12602","url":null,"abstract":"This article describes experiments on speech segmentation using long short-term memory recurrent neural networks. The main part of the paper deals with multi-lingual and cross-lingual segmentation, that is, it is performed on a language different from the one on which the model was trained. The experimental data involves large Czech, English, German, and Russian speech corpora designated for speech synthesis. For optimal multi-lingual modeling, a compact phonetic alphabet was proposed by sharing and clustering phones of particular languages. Many experiments were performed exploring various experimental conditions and data combinations. We proposed a simple procedure that iteratively adapts the inaccurate default model to the new voice/language. The segmentation accuracy was evaluated by comparison with reference segmentation created by a well-tuned hidden Markov model-based framework with additional manual corrections. The resulting segmentation was also employed in a unit selection text-to-speech system. The generated speech quality was compared with the reference segmentation by a preference listening test.","PeriodicalId":55228,"journal":{"name":"Computational Intelligence","volume":"40 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/coin.12602","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135063399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Retina disease prediction using modified convolutional neural network based on Inception‐ResNet model with support vector machine classifier 基于Inception‐ResNet模型和支持向量机分类器的改进卷积神经网络视网膜疾病预测

4区计算机科学

Computational Intelligence Pub Date : 2023-09-10 DOI: 10.1111/coin.12601

Arushi Jain, Vishal Bhatnagar, Annavarapu Chandra Sekhara Rao, Manju Khari

{"title":"Retina disease prediction using modified <scp>convolutional neural network</scp> based on <scp>Inception‐ResNet</scp> model with <scp>support vector machine</scp> classifier","authors":"Arushi Jain, Vishal Bhatnagar, Annavarapu Chandra Sekhara Rao, Manju Khari","doi":"10.1111/coin.12601","DOIUrl":"https://doi.org/10.1111/coin.12601","url":null,"abstract":"Abstract Artificial intelligence and deep learning have aided ocular disease through experiments including automatic illness recognition from images of the iris, fundus, or retina. Automated diagnosis systems (ADSs) provide services for the benefit of humanity and are essential in the early detection of harmful diseases. In fact, early detection is essential to avoid total blindness. In real life, several diagnostic tests such as visual ocular tonometry, retinal exam, and acuity test are performed, but they are conclusively time demanding and stressful for the patient. To consume time and detect the retinal disease earlier, an efficient prediction method is designed. In this proposed model, the first process is data collection that consists of a retinal disease dataset for testing and training. The second process is pre‐processing, which executes image resizing and noise filter for feature extraction. The third step is feature extraction, which extracts the image's form, size, color, and texture for classification with CNN based on Inception‐ResNet V2. The classification process is done by using the SVM with the extracted features. The prediction of diseases is classified such as normal, cataract, glaucoma, and retinal disease. The suggested model's performance is assessed using performance indicators such as accuracy, error, sensitivity, precision, and so forth. The suggested model's accuracy, error, sensitivity, and precision are 0.96, 0.962, 0.964, and 0.04, respectively, higher than existing techniques such as VGG16, Mobilenet V1, ResNet, and AlexNet. Thus, the proposed model instantly predicts retinal disease.","PeriodicalId":55228,"journal":{"name":"Computational Intelligence","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136072330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0