期刊文献+
共找到45篇文章
< 1 2 3 >
每页显示 20 50 100
Nursing Retrieval-Augmented Generation:Retrieval augmented generation for nursing question answering with large language models
1
作者 Liping Xiong Qiqiao Zeng +1 位作者 Weixiang Luo Ronghui Liu 《International Journal of Nursing Sciences》 2025年第6期516-523,I0001,共9页
Objective:This study aimed to develop a Nursing Retrieval-Augmented Generation(NurRAG)system based on large language models(LLMs)and to evaluate its accuracy and clinical applicability in nursing question answering.Me... Objective:This study aimed to develop a Nursing Retrieval-Augmented Generation(NurRAG)system based on large language models(LLMs)and to evaluate its accuracy and clinical applicability in nursing question answering.Methods:A multidisciplinary team consisting of nursing experts,artificial intelligence researchers,and information engineers collaboratively designed the NurRAG framework following the principles of retrieval-augmented generation.The system included four functional modules:1)construction of a nursing knowledge base through document normalization,embedding,and vector indexing;2)nursing question filtering using a supervised classifier;3)semantic retrieval and re-ranking for evidence selection;and 4)evidence-conditioned language model generation to produce citation-based nursing answers.The system was securely deployed on hospital intranet servers using Docker containers.Performance evaluation was conducted with 1,000 expert-verified nursing question–answer pairs.Semantic fidelity was assessed using Recall Oriented Understudy for Gisting Evaluation–Longest Common Subsequence(ROUGE-L),and clinical correctness was measured using Accuracy.Results:The NurRAG system achieved significant improvements in both semantic fidelity and answer accuracy compared with conventional large language models.For ChatGLM2-6B,ROUGE-L increased from(30.73±1.48)%to(64.27±0.27)%,and accuracy increased from(49.08±0.92)%to(75.83±0.35)%.For LLaMA2-7B,ROUGE-L increased from(28.76±0.89)%to(60.33±0.21)%,and accuracy increased from(43.27±0.83)%to(73.29±0.33)%.All differences were statistically significant(P<0.001).A quantitative case analysis further demonstrated that NurRAG effectively reduced hallucinated outputs and generated evidence-based,guideline-concordant nursing responses.Conclusion:The NurRAG system integrates domain-specific retrieval with LLMs generation to provide accurate,reliable,and traceable evidence-based nursing answers.The findings demonstrate the system’s feasibility and potential to improve the accuracy of clinical knowledge access,support evidence-based nursing decision-making,and promote the safe application of artificial intelligence in nursing practice. 展开更多
关键词 Evidence-based nursing Large language models Nursing knowledge base Question-answering system retrieval-augmented generation
在线阅读 下载PDF
A Dynamic Knowledge Base Updating Mechanism-Based Retrieval-Augmented Generation Framework for Intelligent Question-and-Answer Systems
2
作者 Yu Li 《Journal of Computer and Communications》 2025年第1期41-58,共18页
In the context of power generation companies, vast amounts of specialized data and expert knowledge have been accumulated. However, challenges such as data silos and fragmented knowledge hinder the effective utilizati... In the context of power generation companies, vast amounts of specialized data and expert knowledge have been accumulated. However, challenges such as data silos and fragmented knowledge hinder the effective utilization of this information. This study proposes a novel framework for intelligent Question-and-Answer (Q&A) systems based on Retrieval-Augmented Generation (RAG) to address these issues. The system efficiently acquires domain-specific knowledge by leveraging external databases, including Relational Databases (RDBs) and graph databases, without additional fine-tuning for Large Language Models (LLMs). Crucially, the framework integrates a Dynamic Knowledge Base Updating Mechanism (DKBUM) and a Weighted Context-Aware Similarity (WCAS) method to enhance retrieval accuracy and mitigate inherent limitations of LLMs, such as hallucinations and lack of specialization. Additionally, the proposed DKBUM dynamically adjusts knowledge weights within the database, ensuring that the most recent and relevant information is utilized, while WCAS refines the alignment between queries and knowledge items by enhanced context understanding. Experimental validation demonstrates that the system can generate timely, accurate, and context-sensitive responses, making it a robust solution for managing complex business logic in specialized industries. 展开更多
关键词 retrieval-augmented generation Question-and-Answer Large Language Models Dynamic Knowledge Base Updating Mechanism Weighted Context-Aware Similarity
在线阅读 下载PDF
Label-Guided Scientific Abstract Generation with a Siamese Network Using Knowledge Graphs
3
作者 Haotong Wang Yves Lepage 《Computers, Materials & Continua》 2025年第6期4141-4166,共26页
Knowledge graphs convey precise semantic information that can be effectively interpreted by neural networks,and generating descriptive text based on these graphs places significant emphasis on content consistency.Howe... Knowledge graphs convey precise semantic information that can be effectively interpreted by neural networks,and generating descriptive text based on these graphs places significant emphasis on content consistency.However,knowledge graphs are inadequate for providing additional linguistic features such as paragraph structure and expressive modes,making it challenging to ensure content coherence in generating text that spans multiple sentences.This lack of coherence can further compromise the overall consistency of the content within a paragraph.In this work,we present the generation of scientific abstracts by leveraging knowledge graphs,with a focus on enhancing both content consistency and coherence.In particular,we construct the ACL Abstract Graph Dataset(ACL-AGD)which pairs knowledge graphs with text,incorporating sentence labels to guide text structure and diverse expressions.We then implement a Siamese network to complement and concretize the entities and relations based on paragraph structure by accomplishing two tasks:graph-to-text generation and entity alignment.Extensive experiments demonstrate that the logical paragraphs generated by our method exhibit entities with a uniform position distribution and appropriate frequency.In terms of content,our method accurately represents the information encoded in the knowledge graph,prevents the generation of irrelevant content,and achieves coherent and non-redundant adjacent sentences,even with a shared knowledge graph. 展开更多
关键词 graph-to-text generation knowledge graph siamese network scientific abstract
在线阅读 下载PDF
Dual-Perspective Evaluation of Knowledge Graphs for Graph-to-Text Generation
4
作者 Haotong Wang Liyan Wang Yves Lepage 《Computers, Materials & Continua》 2025年第7期305-324,共20页
Data curation is vital for selecting effective demonstration examples in graph-to-text generation.However,evaluating the quality ofKnowledgeGraphs(KGs)remains challenging.Prior research exhibits a narrowfocus on struc... Data curation is vital for selecting effective demonstration examples in graph-to-text generation.However,evaluating the quality ofKnowledgeGraphs(KGs)remains challenging.Prior research exhibits a narrowfocus on structural statistics,such as the shortest path length,while the correctness of graphs in representing the associated text is rarely explored.To address this gap,we introduce a dual-perspective evaluation framework for KG-text data,based on the computation of structural adequacy and semantic alignment.Froma structural perspective,we propose the Weighted Incremental EdgeMethod(WIEM)to quantify graph completeness by leveraging agreement between relation models to predict possible edges between entities.WIEM targets to find increments from models on“unseen links”,whose presence is inversely proportional to the structural adequacy of the original KG in representing the text.From a semantic perspective,we evaluate how well a KG aligns with the text in capturing the intended meaning.To do so,we instruct a large language model to convert KGs into natural language andmeasure the similarity between generated and reference texts.Based on these computations,we apply a Top-K union method,integrating the structural and semantic modules,to rank and select high-quality KGs.We evaluate our framework against various approaches for selecting few-shot examples in graph-to-text generation.Experiments on theAssociation for Computational LinguisticsAbstract Graph Dataset(ACL-AGD)and Automatic Content Extraction 05(ACE05)dataset demonstrate the effectiveness of our approach in distinguishing KG-text data of different qualities,evidenced by the largest performance gap between top-and bottom-ranked examples.We also find that the top examples selected through our dual-perspective framework consistently yield better performance than those selected by traditional measures.These results highlight the importance of data curation in improving graph-to-text generation. 展开更多
关键词 Knowledge graph evaluation graph-to-text generation scientific abstract large language model
在线阅读 下载PDF
CenterLineFormer:Road Centerlines Graph Generation with Single Onboard Camera
5
作者 QIN Minghui LIU Yuanzhi +2 位作者 LU Na TAO Wei ZHAO Hui 《Journal of Shanghai Jiaotong university(Science)》 2025年第5期1009-1017,共9页
As autonomous driving systems advance rapidly,there is a surge in demand for high-definition(HD)maps that provide accurate and dependable prior information on static environments around vehicles.As one of the main hig... As autonomous driving systems advance rapidly,there is a surge in demand for high-definition(HD)maps that provide accurate and dependable prior information on static environments around vehicles.As one of the main high-level elements in HD maps,the road lane centerline is essential for downstream tasks such as autonomous navigation and planning.Considering the complex topology and significant overlap concerns of road centerlines,previous studies have rarely examined the centerline HD map mapping problem.Recent learningbased pipelines take heuristic post-processing predictions to generate a structured centerline output without instance information.To ameliorate this situation,we propose a novel,end-to-end road centerlines vectorized graph generation pipeline,termed CenterLineFormer.CenterLineFormer takes a single onboard camera image as input and predicts a directed graph representing the lane-layer map in the bird’s-eye view(BEV).We propose a strategy for better view transformation that uses a cross-attention mechanism to generate a dense BEV feature map.With our pipeline,we can describe the connection relationship between different centerlines and generate structured lane graphs for downstream modules as planning and control.Qualitatively,our experiments emphasize that our pipeline achieves a superior performance against previous baselines on nuScenes dataset.We also show that CenterLineFormer can generate accurate centerline graph topologies on night driving and complex traffic intersection scenes. 展开更多
关键词 autonomous driving road centerlines graph generation attention mechanism
原文传递
Improving Clinical Support through Retrieval-Augmented Generation Powered Virtual Health Assistants
6
作者 Biju Baburajan Anandavally 《Journal of Computer and Communications》 2024年第11期86-94,共9页
This article examines the implementation of a virtual health assistant powered by Retrieval-Augmented Generation (RAG) and GPT-4, aimed at enhancing clinical support through personalized, real-time interactions with p... This article examines the implementation of a virtual health assistant powered by Retrieval-Augmented Generation (RAG) and GPT-4, aimed at enhancing clinical support through personalized, real-time interactions with patients. The system is hypothesized to improve healthcare accessibility, operational efficiency, and patient outcomes by automating routine tasks and delivering accurate health information. The assistant leverages natural language processing and real-time data retrieval models to respond to patient inquiries, schedule appointments, provide medication reminders, assist with symptom triage, and answer insurance-related questions. By integrating RAG-based virtual care, the system reduces the burden on healthcare specialists and helps mitigate healthcare disparities, particularly in rural areas where traditional care is limited. Although the initial scope of testing did not validate all potential benefits, the results demonstrated high patient satisfaction and strong response accuracy, both critical for systems of this nature. These findings underscore the transformative potential of AI-driven virtual health assistants in enhancing patient engagement, streamlining operational workflows, and improving healthcare accessibility, ultimately contributing to better outcomes and more cost-effective care delivery. 展开更多
关键词 retrieval-augmented generation (RAG) GPT-4 Healthcare Assistants Artificial Intelligence
暂未订购
Topic Controlled Steganography via Graph-to-Text Generation 被引量:1
7
作者 Bowen Sun Yamin Li +3 位作者 Jun Zhang Honghong Xu Xiaoqiang Ma Ping Xia 《Computer Modeling in Engineering & Sciences》 SCIE EI 2023年第7期157-176,共20页
Generation-based linguistic steganography is a popular research area of information hiding.The text generative steganographic method based on conditional probability coding is the direction that researchers have recen... Generation-based linguistic steganography is a popular research area of information hiding.The text generative steganographic method based on conditional probability coding is the direction that researchers have recently paid attention to.However,in the course of our experiment,we found that the secret information hiding in the text tends to destroy the statistical distribution characteristics of the original text,which indicates that this method has the problem of the obvious reduction of text quality when the embedding rate increases,and that the topic of generated texts is uncontrollable,so there is still room for improvement in concealment.In this paper,we propose a topic-controlled steganography method which is guided by graph-to-text generation.The proposed model can automatically generate steganographic texts carrying secret messages from knowledge graphs,and the topic of the generated texts is controllable.We also provide a graph path coding method with corresponding detailed algorithms for graph-to-text generation.Different from traditional linguistic steganography methods,we encode the secret information during graph path coding rather than using conditional probability.We test our method in different aspects and compare it with other text generative steganographic methods.The experimental results show that the model proposed in this paper can effectively improve the quality of the generated text and significantly improve the concealment of steganographic text. 展开更多
关键词 Information hiding linguistic steganography knowledge graph topic controlled text generation
在线阅读 下载PDF
Effect of graph generation on slope stability analysis based on graph theory 被引量:2
8
作者 Enpu Li Xiaoying Zhuang +1 位作者 Wenbo Zheng Yongchang Cai 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2014年第4期380-386,共7页
Limit equilibrium method (LEM) and strength reduction method (SRM) are the most widely used methods for slope stability analysis. However, it can be noted that they both have some limitations in practical applicat... Limit equilibrium method (LEM) and strength reduction method (SRM) are the most widely used methods for slope stability analysis. However, it can be noted that they both have some limitations in practical application. In the LEM, the constitutive model cannot be considered and many assumptions are needed between slices of soil/rock. The SRM requires iterative calculations and does not give the slip surface directly. A method for slope stability analysis based on the graph theory is recently developed to directly calculate the minimum safety factor and potential critical slip surface according to the stress results of numerical simulation. The method is based on current stress state and can overcome the disadvantages mentioned above in the two traditional methods. The influences of edge generation and mesh geometry on the position of slip surface and the safety factor of slope are studied, in which a new method for edge generation is proposed, and reasonable mesh size is suggested. The results of benchmark examples and a rock slope show good accuracy and efficiency of the presented method. 展开更多
关键词 graph theory Slope stability analysis Edge generation Mesh geometry
在线阅读 下载PDF
GSPT-CVAE: A New Controlled Long Text Generation Method Based on T-CVAE
9
作者 Tian Zhao Jun Tu +1 位作者 Puzheng Quan Ruisheng Xiong 《Computers, Materials & Continua》 2025年第7期1351-1377,共27页
Aiming at the problems of incomplete characterization of text relations,poor guidance of potential representations,and low quality of model generation in the field of controllable long text generation,this paper propo... Aiming at the problems of incomplete characterization of text relations,poor guidance of potential representations,and low quality of model generation in the field of controllable long text generation,this paper proposes a new GSPT-CVAE model(Graph Structured Processing,Single Vector,and Potential Attention Com-puting Transformer-Based Conditioned Variational Autoencoder model).The model obtains a more comprehensive representation of textual relations by graph-structured processing of the input text,and at the same time obtains a single vector representation by weighted merging of the vector sequences after graph-structured processing to get an effective potential representation.In the process of potential representation guiding text generation,the model adopts a combination of traditional embedding and potential attention calculation to give full play to the guiding role of potential representation for generating text,to improve the controllability and effectiveness of text generation.The experimental results show that the model has excellent representation learning ability and can learn rich and useful textual relationship representations.The model also achieves satisfactory results in the effectiveness and controllability of text generation and can generate long texts that match the given constraints.The ROUGE-1 F1 score of this model is 0.243,the ROUGE-2 F1 score is 0.041,the ROUGE-L F1 score is 0.22,and the PPL-Word score is 34.303,which gives the GSPT-CVAE model a certain advantage over the baseline model.Meanwhile,this paper compares this model with the state-of-the-art generative models T5,GPT-4,Llama2,and so on,and the experimental results show that the GSPT-CVAE model has a certain competitiveness. 展开更多
关键词 Controllable text generation textual graph structuring text relationships potential characterization
在线阅读 下载PDF
Document Clustering Using Graph Based Fuzzy Association Rule Generation
10
作者 P.Perumal 《Computer Systems Science & Engineering》 SCIE EI 2022年第10期203-218,共16页
With the wider growth of web-based documents,the necessity of automatic document clustering and text summarization is increased.Here,document summarization that is extracting the essential task with appropriate inform... With the wider growth of web-based documents,the necessity of automatic document clustering and text summarization is increased.Here,document summarization that is extracting the essential task with appropriate information,removal of unnecessary data and providing the data in a cohesive and coherent manner is determined to be a most confronting task.In this research,a novel intelligent model for document clustering is designed with graph model and Fuzzy based association rule generation(gFAR).Initially,the graph model is used to map the relationship among the data(multi-source)followed by the establishment of document clustering with the generation of association rule using the fuzzy concept.This method shows benefit in redundancy elimination by mapping the relevant document using graph model and reduces the time consumption and improves the accuracy using the association rule generation with fuzzy.This framework is provided in an interpretable way for document clustering.It iteratively reduces the error rate during relationship mapping among the data(clusters)with the assistance of weighted document content.Also,this model represents the significance of data features with class discrimination.It is also helpful in measuring the significance of the features during the data clustering process.The simulation is done with MATLAB 2016b environment and evaluated with the empirical standards like Relative Risk Patterns(RRP),ROUGE score,and Discrimination Information Measure(DMI)respectively.Here,DailyMail and DUC 2004 dataset is used to extract the empirical results.The proposed gFAR model gives better trade-off while compared with various prevailing approaches. 展开更多
关键词 Document clustering text summarization fuzzy model association rule generation graph model relevance mapping feature patterns
在线阅读 下载PDF
SGG-DGCN:Wind Turbine Anomaly Identification by Using Deep Graph Convolutional Networks with Similarity Graph Generation Strategy
11
作者 Xiaomin Wang Di Zhou +2 位作者 Xiao Zhuang Jian Ge and Jiawei Xiang 《Journal of Dynamics, Monitoring and Diagnostics》 2024年第4期258-267,共10页
In order to minimize wind turbine failures,fault diagnosis of wind turbines is becoming increasinglyimportant,deep learning methods excel at multivariate monitoring and data modeling,but they are often limited toEucli... In order to minimize wind turbine failures,fault diagnosis of wind turbines is becoming increasinglyimportant,deep learning methods excel at multivariate monitoring and data modeling,but they are often limited toEuclidean space and struggle to capture the complex coupling between wind turbine sensors.To addressthis problem,we convert SCADA data into graph data,where sensors act as nodes and their topologicalconnections act as edges,to represent these complex relationships more efficiently.Specifically,a wind turbineanomaly identification method based on deep graph convolutional neural network using similarity graphgeneration strategy(SGG-DGCN)is proposed.Firstly,a plurality of similarity graphs containing similarityinformation between nodes are generated by different distance metrics.Then,the generated similarity graphs arefused using the proposed similarity graph generation strategy.Finally,the fused similarity graphs are fed into theDGCN model for anomaly identification.To verify the effectiveness of the proposed SGG-DGCN model,we conducted a large number of experiments.The experimental results show that the proposed SGG-DGCNmodel has the highest accuracy compared with other models.In addition,the results of ablation experimentalso demonstrate that the proposed SGG strategy can effectively improve the accuracy of WT anomalyidentification. 展开更多
关键词 anomaly identification deep graph convolutional networks similarity graph generation wind turbine
在线阅读 下载PDF
STG-BASED VERIFICATION AND TEST GENERATION
12
作者 He Xinhua Gong Yunzhan(Armoured Force Engineering Institute, Beijing 100072)Wei Daozheng (CAD Lab, Institute of Computing Technology Academia Sinica, Beijing 100080) 《Journal of Electronics(China)》 1996年第1期68-73,共6页
This paper presents the techniques of verification and Test Generation(TG) for sequential machines (Finite State Machines, FSMs) based on state traversing of State Transition Graph(STG). The problems of traversing, re... This paper presents the techniques of verification and Test Generation(TG) for sequential machines (Finite State Machines, FSMs) based on state traversing of State Transition Graph(STG). The problems of traversing, redundancy and transition fault model are identified. In order to achieve high fault coverage collapsing testing is proposed. Further, the heuristic knowledge for speeding up verification and TG are described. 展开更多
关键词 VERIFICATION TEST generation Traversing STATE TRANSITION graph
在线阅读 下载PDF
Web Service Generation through Program Slicing
13
作者 Yingzhou Zhang Wei Fu +2 位作者 Geng Yang Lei Chen Weifeng Zhang 《International Journal of Communications, Network and System Sciences》 2010年第11期877-887,共11页
As the development of web service (WS), applications based on web services (WS), which are convent and platform-independent, have become increasingly popular in recent years. However, how to identify, generate and com... As the development of web service (WS), applications based on web services (WS), which are convent and platform-independent, have become increasingly popular in recent years. However, how to identify, generate and compose services has become an open issue recently. This paper proposes a method based on program slicing to realize the generation and composition of web services. This paper introduces the method about how to generate a WSDL file and a SOAP message from source codes as well as the theory of function dependence graph (FDG). In addition, this paper gives the way to generate a proxy service for each service, which allows users to easily call a service. The results of experiments show that our generation and composition methods of WS are feasible and flexible. 展开更多
关键词 Web Service Arogram SLICING WS generation Function DEPENDENCE graph HASKELL
在线阅读 下载PDF
Enhancing SAT-Based Test Pattern Generation
14
作者 刘歆 熊有伦 《Journal of Electronic Science and Technology of China》 2005年第2期134-139,共6页
This paper presents modeling tools based on Boolean satisfiability (SAT) to solve problems of test generation for combinational circuits. It exploits an added layer to maintain circuit-related information and value ju... This paper presents modeling tools based on Boolean satisfiability (SAT) to solve problems of test generation for combinational circuits. It exploits an added layer to maintain circuit-related information and value justification relations to a generic SAT algorithm. It dovetails binary decision graphs (BDD) and SAT techniques to improve the efficiency of automatic test pattern generation (ATPG). More specifically, it first exploits inexpensive reconvergent fanout analysis of circuit to gather information on the local signal correlation by using BDD learning, then uses the above learned information to restrict and focus the overall search space of SAT-based ATPG. Its learning technique is effective and lightweight. The experimental results demonstrate the effectiveness of the approach. 展开更多
关键词 test pattern generation fault detection Boolean satisfiability binary decision graphs
在线阅读 下载PDF
MMGCF: Generating Counterfactual Explanations for Molecular Property Prediction via Motif Rebuild
15
作者 Xiuping Zhang Qun Liu Rui Han 《Journal of Computer and Communications》 2025年第1期152-168,共17页
Predicting molecular properties is essential for advancing for advancing drug discovery and design. Recently, Graph Neural Networks (GNNs) have gained prominence due to their ability to capture the complex structural ... Predicting molecular properties is essential for advancing for advancing drug discovery and design. Recently, Graph Neural Networks (GNNs) have gained prominence due to their ability to capture the complex structural and relational information inherent in molecular graphs. Despite their effectiveness, the “black-box” nature of GNNs remains a significant obstacle to their widespread adoption in chemistry, as it hinders interpretability and trust. In this context, several explanation methods based on factual reasoning have emerged. These methods aim to interpret the predictions made by GNNs by analyzing the key features contributing to the prediction. However, these approaches fail to answer critical questions: “How to ensure that the structure-property mapping learned by GNNs is consistent with established domain knowledge”. In this paper, we propose MMGCF, a novel counterfactual explanation framework designed specifically for the prediction of GNN-based molecular properties. MMGCF constructs a hierarchical tree structure on molecular motifs, enabling the systematic generation of counterfactuals through motif perturbations. This framework identifies causally significant motifs and elucidates their impact on model predictions, offering insights into the relationship between structural modifications and predicted properties. Our method demonstrates its effectiveness through comprehensive quantitative and qualitative evaluations of four real-world molecular datasets. 展开更多
关键词 INTERPRETABILITY Causal Relationship Counterfactual Explanation Molecular graph generation
在线阅读 下载PDF
Explainable and generalizable AI for AGC dispatch with heterogeneous generation units:A case study using graph convolutional networks
16
作者 Xiaoshun Zhang Kun Zhang +3 位作者 Zhengxun Guo Penggen Wang Penghui Xiong Mingyu Wang 《Energy and AI》 2025年第4期849-862,共14页
Automatic generation control(AGC)dispatch is essential for maintaining frequency stability and power balance in modern grids with high renewable penetration.Conventional optimization and machine learning methods eithe... Automatic generation control(AGC)dispatch is essential for maintaining frequency stability and power balance in modern grids with high renewable penetration.Conventional optimization and machine learning methods either incur heavy computational costs or act as black-box models,which limits interpretability and alization gener-in safety-critical operations.To overcome these gaps,we propose an explainable and generalizable framework that integrates graph convolutional networks(GCNs)with Shapley additive explanations(SHAP).SHAP provides quantitative feature attributions,revealing spatiotemporal variability and redundancy,while the derived insights are used to iteratively optimize the GCN adjacency matrix and capture inter-generator dependencies more effectively.This closed-loop design enhances both model transparency and robustness.Case studies on a two-area load frequency control(LFC)system and a provincial power grid in China show consistent improvements:in the LFC model,frequency deviation,power deviation,and ACE are reduced by 14.30%,58.95%,and 29.22%,respectively;in the provincial grid,ACE overshoot decreases by 99.52%,frequency deviation by 80.67%,and power overshoot is eliminated,with correction distance reduced by up to 55.24%.These results demonstrate that explainability-driven graph learning can significantly improve the reliability and adaptability of AI-based AGC dispatch in complex,heterogeneous power systems. 展开更多
关键词 Automatic generation control graph convolutional network INTERPRETABILITY Shapley additive explanation Adjacency matrix optimization
在线阅读 下载PDF
A Knowledge-Enhanced Dialogue Model Based on Multi-Hop Information with Graph Attention 被引量:1
17
作者 Zhongqin Bi Shiyang Wang +2 位作者 Yan Chen Yongbin Li Jung Yoon Kim 《Computer Modeling in Engineering & Sciences》 SCIE EI 2021年第8期403-426,共24页
With the continuous improvement of the e-commerce ecosystem and the rapid growth of e-commerce data, inthe context of the e-commerce ecosystem, consumers ask hundreds of millions of questions every day. In order toimp... With the continuous improvement of the e-commerce ecosystem and the rapid growth of e-commerce data, inthe context of the e-commerce ecosystem, consumers ask hundreds of millions of questions every day. In order toimprove the timeliness of customer service responses, many systems have begun to use customer service robotsto respond to consumer questions, but the current customer service robots tend to respond to specific questions.For many questions that lack background knowledge, they can generate only responses that are biased towardsgenerality and repetitiveness. To better promote the understanding of dialogue and generate more meaningfulresponses, this paper introduces knowledge information into the research of question answering system by usinga knowledge graph. The unique structured knowledge base of the knowledge graph is convenient for knowledgequery, can acquire knowledge faster, and improves the background information needed for answering questions. Toavoid the lack of information in the dialogue process, this paper proposes the Multi-hop Knowledge InformationEnhanced Dialogue-Graph Attention (MKIED-GA) model. The model first retrieves the problem subgraph directlyrelated to the input information from the entire knowledge base and then uses the graph neural network as theknowledge inference module on the subgraph to encode the subgraph. The graph attention mechanism is usedto determine the one-hop and two-hop entities that are more relevant to the problem to achieve the aggregationof highly relevant neighbor information. This further enriches the semantic information to provide a betterunderstanding of the meaning of the input question and generate appropriate response information. In the processof generating a response, a multi-attention flow mechanism is used to focus on different information to promotethe generation of better responses. Experiments have proved that the model presented in this article can generatemore meaningful responses than other models. 展开更多
关键词 E-commerce ecosystem conversation generation knowledge graph graph neural network graph attention
在线阅读 下载PDF
Model for Generating Scale-Free Artificial Social Networks Using Small-World Networks
18
作者 Farhan Amin Gyu Sang Choi 《Computers, Materials & Continua》 SCIE EI 2022年第12期6367-6391,共25页
The Internet of Things(IoT)has the potential to be applied to social networks due to innovative characteristics and sophisticated solutions that challenge traditional uses.Social network analysis(SNA)is a good example... The Internet of Things(IoT)has the potential to be applied to social networks due to innovative characteristics and sophisticated solutions that challenge traditional uses.Social network analysis(SNA)is a good example that has recently gained a lot of scientific attention.It has its roots in social and economic research,as well as the evaluation of network science,such as graph theory.Scientists in this area have subverted predefined theories,offering revolutionary ones regarding interconnected networks,and they have highlighted the mystery of six degrees of separation with confirmation of the small-world phenomenon.The motivation of this study is to understand and capture the clustering properties of large networks and social networks.We present a network growth model in this paper and build a scale-free artificial social network with controllable clustering coefficients.The random walk technique is paired with a triangle generating scheme in our proposed model.As a result,the clustering controlmechanism and preferential attachment(PA)have been realized.This research builds on the present random walk model.We took numerous measurements for validation,including degree behavior and the measure of clustering decay in terms of node degree,among other things.Finally,we conclude that our suggested random walk model is more efficient and accurate than previous state-of-the-art methods,and hence it could be a viable alternative for societal evolution. 展开更多
关键词 Social networks small-world networks network generation models graph theory random walk network design social network analysis
在线阅读 下载PDF
Directed graph-based distribution network reconfiguration for operation mode adjustment and service restoration considering distributed generation 被引量:14
19
作者 Haifeng HONG Zhesheng HU +2 位作者 Ruipeng GUO Jun MA Jiong TIAN 《Journal of Modern Power Systems and Clean Energy》 SCIE EI 2017年第1期142-149,共8页
We present a directed graph-based method for distribution network reconfiguration considering distributed generation. Two reconfiguration situations are considered: operation mode adjustment with the objective of mini... We present a directed graph-based method for distribution network reconfiguration considering distributed generation. Two reconfiguration situations are considered: operation mode adjustment with the objective of minimizing active power loss(situation Ⅰ) and service restoration with the objective of maximizing loads restored(situation Ⅱ). These two situations are modeled as a mixed integer quadratic programming problem and a mixed integer linear programming problem, respectively. The properties of the distribution network with distributed generation considered are reflected as the structure model and the constraints described by directed graph. More specifically, the concepts of "in-degree" and "out-degree"are presented to ensure the radial structure of the distribution network, and the concepts of "virtual node" and"virtual demand" are developed to ensure the connectivity of charged nodes in every independent power supply area.The validity and effectiveness of the proposed method are verified by test results of an IEEE 33-bus system and a 5-feeder system. 展开更多
关键词 Distribution network Distributed generation Network reconfiguration Directed graph Operation mode adjustment Service restoration
原文传递
Knowledge Graph Enhanced Transformers for Diagnosis Generation of Chinese Medicine 被引量:4
20
作者 WANG Xin-yu YANG Tao +1 位作者 GAO Xiao-yuan HU Kong-fa 《Chinese Journal of Integrative Medicine》 SCIE CAS CSCD 2024年第3期267-276,共10页
Chinese medicine(CM)diagnosis intellectualization is one of the hotspots in the research of CM modernization.The traditional CM intelligent diagnosis models transform the CM diagnosis issues into classification issues... Chinese medicine(CM)diagnosis intellectualization is one of the hotspots in the research of CM modernization.The traditional CM intelligent diagnosis models transform the CM diagnosis issues into classification issues,however,it is difficult to solve the problems such as excessive or similar categories.With the development of natural language processing techniques,text generation technique has become increasingly mature.In this study,we aimed to establish the CM diagnosis generation model by transforming the CM diagnosis issues into text generation issues.The semantic context characteristic learning capacity was enhanced referring to Bidirectional Long Short-Term Memory(BILSTM)with Transformer as the backbone network.Meanwhile,the CM diagnosis generation model Knowledge Graph Enhanced Transformer(KGET)was established by introducing the knowledge in medical field to enhance the inferential capability.The KGET model was established based on 566 CM case texts,and was compared with the classic text generation models including Long Short-Term Memory sequence-to-sequence(LSTM-seq2seq),Bidirectional and Auto-Regression Transformer(BART),and Chinese Pre-trained Unbalanced Transformer(CPT),so as to analyze the model manifestations.Finally,the ablation experiments were performed to explore the influence of the optimized part on the KGET model.The results of Bilingual Evaluation Understudy(BLEU),Recall-Oriented Understudy for Gisting Evaluation 1(ROUGE1),ROUGE2 and Edit distance of KGET model were 45.85,73.93,54.59 and 7.12,respectively in this study.Compared with LSTM-seq2seq,BART and CPT models,the KGET model was higher in BLEU,ROUGE1 and ROUGE2 by 6.00–17.09,1.65–9.39 and 0.51–17.62,respectively,and lower in Edit distance by 0.47–3.21.The ablation experiment results revealed that introduction of BILSTM model and prior knowledge could significantly increase the model performance.Additionally,the manual assessment indicated that the CM diagnosis results of the KGET model used in this study were highly consistent with the practical diagnosis results.In conclusion,text generation technology can be effectively applied to CM diagnostic modeling.It can effectively avoid the problem of poor diagnostic performance caused by excessive and similar categories in traditional CM diagnostic classification models.CM diagnostic text generation technology has broad application prospects in the future. 展开更多
关键词 Chinese medicine diagnosis knowledge graph enhanced transformer text generation
原文传递
上一页 1 2 3 下一页 到第
使用帮助 返回顶部