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A Multi-layer Information Integration Platform for Chemical Process Operation Systems 被引量:1
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作者 钱宇 李荷华 李秀喜 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2004年第5期668-672,共5页
In the process industry, automation and process control systems are widely implemented, information integration is however far away from satisfactory. It remains a hard job for senior managers to make decisions based ... In the process industry, automation and process control systems are widely implemented, information integration is however far away from satisfactory. It remains a hard job for senior managers to make decisions based on the plant-wide real-time integrated information. This paper proposes a multi-layer information integration platform. In the data integration level, the standard for the exchange of product (STEP) and the extensible markup language (XML) are used to unify these data of the chemical process. In the model integration level, the models are integrated by using the neutral model repository and CAPE-OPEN. In the integration of process task, the common object request broker architecture (CORBA) is used as the communication mediator. The XML is taken as the data standard. A uniform information platform is thus constructed and realized. The proposed information integration platform is satisfactorily implemented to solve the Tennessee Eastman (TE) problem. 展开更多
关键词 information integration process operation system neutral model standardfor the exchange of product
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Intelligent Parameter Decision-Making and Multi-objective Prediction for Multi-layer and Multi-pass LDED Process
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作者 Li Yaguan Nie Zhenguo +2 位作者 Li Huilin Wang Tao Huang Qingxue 《稀有金属材料与工程》 北大核心 2026年第1期47-58,共12页
The key parameters that characterize the morphological quality of multi-layer and multi-pass metal laser deposited parts are the surface roughness and the error between the actual printing height and the theoretical m... The key parameters that characterize the morphological quality of multi-layer and multi-pass metal laser deposited parts are the surface roughness and the error between the actual printing height and the theoretical model height.The Taguchi method was employed to establish the correlations between process parameter combinations and multi-objective characterization of metal deposition morphology(height error and roughness).Results show that using the signal-to-noise ratio and grey relational analysis,the optimal parameter combination for multi-layer and multi-pass deposition is determined as follows:laser power of 800 W,powder feeding rate of 0.3 r/min,step distance of 1.6 mm,and scanning speed of 20 mm/s.Subsequently,a Genetic Bayesian-back propagation(GB-BP)network is constructed to predict multi-objective responses.Compared with the traditional back propagation network,the GB-back propagation network improves the prediction accuracy of height error and surface roughness by 43.14%and 71.43%,respectively.This network can accurately predict the multi-objective characterization of morphological quality of multi-layer and multi-pass metal deposited parts. 展开更多
关键词 multi-layer and multi-pass laser cladding Taguchi method grey relational analysis GB-BP network
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A Unified Feature Selection Framework Combining Mutual Information and Regression Optimization for Multi-Label Learning
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作者 Hyunki Lim 《Computers, Materials & Continua》 2026年第4期1262-1281,共20页
High-dimensional data causes difficulties in machine learning due to high time consumption and large memory requirements.In particular,in amulti-label environment,higher complexity is required asmuch as the number of ... High-dimensional data causes difficulties in machine learning due to high time consumption and large memory requirements.In particular,in amulti-label environment,higher complexity is required asmuch as the number of labels.Moreover,an optimization problem that fully considers all dependencies between features and labels is difficult to solve.In this study,we propose a novel regression-basedmulti-label feature selectionmethod that integrates mutual information to better exploit the underlying data structure.By incorporating mutual information into the regression formulation,the model captures not only linear relationships but also complex non-linear dependencies.The proposed objective function simultaneously considers three types of relationships:(1)feature redundancy,(2)featurelabel relevance,and(3)inter-label dependency.These three quantities are computed usingmutual information,allowing the proposed formulation to capture nonlinear dependencies among variables.These three types of relationships are key factors in multi-label feature selection,and our method expresses them within a unified formulation,enabling efficient optimization while simultaneously accounting for all of them.To efficiently solve the proposed optimization problem under non-negativity constraints,we develop a gradient-based optimization algorithm with fast convergence.Theexperimental results on sevenmulti-label datasets show that the proposed method outperforms existingmulti-label feature selection techniques. 展开更多
关键词 feature selection multi-label learning regression model optimization mutual information
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Information for Authors
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《Journal of Geographical Sciences》 2026年第1期F0003-F0003,共1页
1 General information Journal of Geographical Sciences is an international academic journal that publishes papers of the highest quality in physical geography, natural resources, environmental sciences, geographic inf... 1 General information Journal of Geographical Sciences is an international academic journal that publishes papers of the highest quality in physical geography, natural resources, environmental sciences, geographic information sciences, remote sensing and cartography. Manuscripts come from different parts of the world. 展开更多
关键词 natural resources remote sensing environmental sciences physical geography geographic information sciences
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Evaluation of the susceptibility to landslide geological disasters based on different slope units and an information content random forest model:a case study of the Longhua District,Shenzhen
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作者 XIONG Haoyu RAN Xiangjin XUE Linfu 《Global Geology》 2026年第1期86-100,共15页
Slope units are divided according to the real topography and have clear geological characteristics,making them ideal units for evaluating the susceptibility to geological disasters.Based on the results of automaticall... Slope units are divided according to the real topography and have clear geological characteristics,making them ideal units for evaluating the susceptibility to geological disasters.Based on the results of automatically and manually corrected hydrological slope unit division,the Longhua District,Shenzhen City,Guangdong Province,was selected as the study area.A total of 15 influencing factors,namely Fluctuation,slope,slope aspect,curvature,topographic witness index(TWI),stream power index(SPI),topographic roughness index(TRI),annual average rainfall,distance to water system,engineering rock group,distance to fault,land use,normalized difference vegetation index(NDVI),nighttime light,and distance to road,were selected as evaluation indicators.The information volume model(IV)and random points were used to select non-geological disaster units,and then the random forest model(RF)was used to evaluate the susceptibility to geological disasters.The automatic slope unit and the hydrological slope unit were compared and analyzed in the random forest and information volume random forest models.The results show that the area under the curve(AUC)values of the automatic slope unit evaluation results are 0.931 for the IV-RF model and 0.716 for the RF model,which are 0.6%(IV-RF model)and 1.9%(RF model)higher than those for the hydrological slope unit.Based on a comparison of the evaluation methods based on the two types of slope units,the hydrological slope unit evaluation method based on manual correction is highly subjective,is complicated to operate,and has a low evaluation accuracy,whereas the evaluation method based on automatic slope unit division is efficient and accurate,is suitable for large-scale efficient geological disaster evaluation,and can better deal with the problem of geological disaster susceptibility evaluation. 展开更多
关键词 geological hazards slope unit information content random forest model susceptibility assessment SHENZHEN
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Deep Learning-Enhanced Human Sensing with Channel State Information: A Survey
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作者 Binglei Yue Aili Jiang +3 位作者 Chun Yang Junwei Lei Heng Liu Yin Zhang 《Computers, Materials & Continua》 2026年第1期1-28,共28页
With the growing advancement of wireless communication technologies,WiFi-based human sensing has gained increasing attention as a non-intrusive and device-free solution.Among the available signal types,Channel State I... With the growing advancement of wireless communication technologies,WiFi-based human sensing has gained increasing attention as a non-intrusive and device-free solution.Among the available signal types,Channel State Information(CSI)offers fine-grained temporal,frequency,and spatial insights into multipath propagation,making it a crucial data source for human-centric sensing.Recently,the integration of deep learning has significantly improved the robustness and automation of feature extraction from CSI in complex environments.This paper provides a comprehensive review of deep learning-enhanced human sensing based on CSI.We first outline mainstream CSI acquisition tools and their hardware specifications,then provide a detailed discussion of preprocessing methods such as denoising,time–frequency transformation,data segmentation,and augmentation.Subsequently,we categorize deep learning approaches according to sensing tasks—namely detection,localization,and recognition—and highlight representative models across application scenarios.Finally,we examine key challenges including domain generalization,multi-user interference,and limited data availability,and we propose future research directions involving lightweight model deployment,multimodal data fusion,and semantic-level sensing. 展开更多
关键词 Channel State information(CSI) human sensing human activity recognition deep learning
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An improved conditional denoising diffusion GAN for Mach number field reconstruction in a multi-tunnel combined inlet based on sparse parameter information
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作者 Ke MIN Fan LEI +2 位作者 Jiale ZHANG Chengxiang ZHU Yancheng YOU 《Chinese Journal of Aeronautics》 2026年第1期169-190,共22页
The internal flow fields within a three-dimensional inward-tunning combined inlet are extremely complex,especially during the engine mode transition,where the tunnel changes may impact the flow fields significantly.To... The internal flow fields within a three-dimensional inward-tunning combined inlet are extremely complex,especially during the engine mode transition,where the tunnel changes may impact the flow fields significantly.To develop an efficient flow field reconstruction model for this,we present an Improved Conditional Denoising Diffusion Generative Adversarial Network(ICDDGAN),which integrates Conditional Denoising Diffusion Probabilistic Models(CDDPMs)with Style GAN,and introduce a reconstruction discrimination mechanism and dynamic loss weight learning strategy.We establish the Mach number flow field dataset by numerical simulation at various backpressures for the mode transition process from turbine mode to ejector ramjet mode at Mach number 2.5.The proposed ICDDGAN model,given only sparse parameter information,can rapidly generate high-quality Mach number flow fields without a large number of samples for training.The results show that ICDDGAN is superior to CDDGAN in terms of training convergence and stability.Moreover,the interpolation and extrapolation test results during backpressure conditions show that ICDDGAN can accurately and quickly reconstruct Mach number fields at various tunnel slice shapes,with a Structural Similarity Index Measure(SSIM)of over 0.96 and a Mean-Square Error(MSE)of 0.035%to actual flow fields,reducing time costs by 7-8 orders of magnitude compared to Computational Fluid Dynamics(CFD)calculations.This can provide an efficient means for rapid computation of complex flow fields. 展开更多
关键词 Flow field reconstruction Improved Conditional Denoising Diffusion Generative Adversarial Network(ICDDGAN) Mode transition Sparse parameter information Three-dimensional inward-tunning combined inlet
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An Innovative Soft Design Science Methodology for Improving Development of a Secure Information System in Tanzania Using Multi-Layered Approach 被引量:2
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作者 Maduhu Mshangi Edephonce Ngemera Nfuka Camilius Sanga 《Journal of Information Security》 2017年第3期141-165,共25页
This paper presents an innovative Soft Design Science Methodology for improving information systems security using multi-layered security approach. The study applied Soft Design Science Methodology to address the prob... This paper presents an innovative Soft Design Science Methodology for improving information systems security using multi-layered security approach. The study applied Soft Design Science Methodology to address the problematic situation on how information systems security can be improved. In addition, Soft Design Science Methodology was compounded with mixed research methodology. This holistic approach helped for research methodology triangulation. The study assessed security requirements and developed a framework for improving information systems security. The study carried out maturity level assessment to determine security status quo in the education sector in Tanzania. The study identified security requirements gap (IT security controls, IT security measures) using ISO/IEC 21827: Systems Security Engineering-Capability Maturity Model (SSE-CMM) with a rating scale of 0 - 5. The results of this study show that maturity level across security domain is 0.44 out of 5. The finding shows that the implementation of IT security controls and security measures for ensuring security goals are lacking or conducted in ad-hoc. Thus, for improving the security of information systems, organisations should implement security controls and security measures in each security domain (multi-layer security). This research provides a framework for enhancing information systems security during capturing, processing, storage and transmission of information. This research has several practical contributions. Firstly, it contributes to the body of knowledge of information systems security by providing a set of security requirements for ensuring information systems security. Secondly, it contributes empirical evidence on how information systems security can be improved. Thirdly, it contributes on the applicability of Soft Design Science Methodology on addressing the problematic situation in information systems security. The research findings can be used by decision makers and lawmakers to improve existing cyber security laws, and enact laws for data privacy and sharing of open data. 展开更多
关键词 SOFT DESIGN SCIENCE information SYSTEMS Security DESIGN SCIENCE Research SOFT SYSTEMS METHODOLOGY multi-layered APPROACH
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Informer-LSTM融合算法在蓝莓基质温湿度预测中的研究与应用
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作者 胡玲艳 陈鹏宇 +6 位作者 郭占俊 徐国辉 秦山 付康 盖荣丽 汪祖民 张雨萌 《郑州大学学报(理学版)》 北大核心 2026年第1期78-86,共9页
为了精准预测温室蓝莓基质的温湿度变化趋势,提出一种融合Informer-LSTM算法的温湿度预测方法。以温室蓝莓现场环境数据为研究对象,使用LSTM算法捕捉时间序列数据中的依赖关系并与自注意力机制相结合,使模型在聚焦自注意力特征的同时兼... 为了精准预测温室蓝莓基质的温湿度变化趋势,提出一种融合Informer-LSTM算法的温湿度预测方法。以温室蓝莓现场环境数据为研究对象,使用LSTM算法捕捉时间序列数据中的依赖关系并与自注意力机制相结合,使模型在聚焦自注意力特征的同时兼顾LSTM特征,以增强其长期记忆力。在生成初步预测序列后,再应用LSTM算法修正模型的短期注意力,提高模型的反应速度。实验结果显示,Informer-LSTM预测模型在预测准确率、鲁棒性和响应速度等方面都有显著的优势。当温度湿度等时序输入数据发生明显变化时,模型能快速捕获短期内输入数据的动态模式变化。该模型在智慧温室管理中,对辅助人工决策及实现智能化控制具有较高实际价值。 展开更多
关键词 智慧农业 温室蓝莓 informer模型 LSTM模型 温湿度预测
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基于改进Informer的商业建筑短期用电负荷多步预测
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作者 周璇 李可昕 +3 位作者 郭子轩 俞祝良 闫军威 蔡盼盼 《华南理工大学学报(自然科学版)》 北大核心 2026年第1期42-52,共11页
商业建筑短期用电负荷多步预测是城市有序用电和虚拟电厂调度的关键环节。商业建筑用电负荷时间序列具有强随机性、非平稳、非线性等特点,针对传统的迭代式多步用电负荷预测方法存在误差累积效应影响预测精度的问题,提出一种基于频率增... 商业建筑短期用电负荷多步预测是城市有序用电和虚拟电厂调度的关键环节。商业建筑用电负荷时间序列具有强随机性、非平稳、非线性等特点,针对传统的迭代式多步用电负荷预测方法存在误差累积效应影响预测精度的问题,提出一种基于频率增强通道注意力机制(FECAM)—麻雀优化算法(SSA)—Informer的短期用电负荷多步预测方法。该方法在Informer编码器输出时域特征的基础上,采用FECAM对各特征通道间的频率依赖性进行自适应建模,进一步提取多维输入序列的频域特征,生成式解码器利用融合的时、频域信息直接输出未来多步用电负荷序列。此外,由于改进Informer超参数设置缺乏理论依据,使用SSA寻优学习率、批处理大小、全连接维度和失活率的最佳组合。以广州某商业建筑全年用电负荷数据作为实际算例,结果表明,与其他深度学习模型相比,所提模型在不同预测步长(48、96、288、480、672步)下的预测精度显著提升,具有更优的短期用电负荷多步预测性能。 展开更多
关键词 商业建筑用电负荷预测 频率增强通道注意力机制 informER 麻雀优化算法
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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Informer模型的智能洪水预报方法研究
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作者 董付强 万喆 +3 位作者 王丽娟 蔡金华 万俊 罗永钦 《人民长江》 北大核心 2026年第1期53-63,共11页
洪水预报精度和预见期是做好水库洪水预警和调度的关键,在洪水预报中应用人工智能模型可有效提高洪水预报精度。应用K-means聚类分析法对潘口水库流域进行了科学划分,然后采用Informer深度学习模型进行洪水预报,并与传统LSTM模型进行了... 洪水预报精度和预见期是做好水库洪水预警和调度的关键,在洪水预报中应用人工智能模型可有效提高洪水预报精度。应用K-means聚类分析法对潘口水库流域进行了科学划分,然后采用Informer深度学习模型进行洪水预报,并与传统LSTM模型进行了对比研究,最后基于Informer模型设计了4种预报方案分析上游水库对潘口水库洪水预报精度的影响。结果表明:(1) Informer模型的预报性能优于LSTM模型;(2)优化后的Informer模型,训练集和测试集总体纳什系数为0.892,洪水总量误差为6.64%,洪水峰值误差为7.69%,洪量误差及洪峰误差平均值均达到甲级标准;(3)基于Informer模型的2023年和2024年堵河流域潘口水库实际检验预报纳什系数均值为0.878和0.827,洪量误差及洪峰误差合格率均达100%,均满足甲级要求。基于深度学习Informer模型的智能洪水预报不仅可提高洪量和洪峰的预测精度,而且具有较强的实际应用潜力,可为水库洪水预报预警及防灾减灾提供决策依据。 展开更多
关键词 智能洪水预报 深度学习模型 informer模型 LSTM模型 潘口水库 堵河
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基于改进Informer模型的无人机姿态估计方法
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作者 肖蘅 包乃源 +1 位作者 周文 杨亚婷 《现代电子技术》 北大核心 2026年第4期57-63,共7页
传统无人机姿态估计方法由于传感器精度不高和设备成本限制,难以满足复杂环境中的精确需求。为此,提出一种基于改进Informer模型的无人机姿态估计方法,引入多尺度时间注意力机制和动态时间规整(DTW)损失函数,提升模型在长序列数据处理... 传统无人机姿态估计方法由于传感器精度不高和设备成本限制,难以满足复杂环境中的精确需求。为此,提出一种基于改进Informer模型的无人机姿态估计方法,引入多尺度时间注意力机制和动态时间规整(DTW)损失函数,提升模型在长序列数据处理和动态飞行数据适应方面的能力。此外,采用遗传算法对模型超参数进行优化,显著提高了复杂飞行数据处理的准确性和鲁棒性。基于苏黎世大学机器人实验室发布的UZH-FPV竞赛数据集,将改进后的Informer模型与LSTM、GRU和DNN模型进行了实验对比。结果表明,改进Informer模型在无人机的俯仰角、滚转角和偏航角估计方面均显著优于其他对比模型。 展开更多
关键词 无人机姿态估计 informer模型 多尺度时间注意力机制 动态时间规整损失函数 遗传算法优化 长序列数据处理
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Multi-layer multi-pass friction rolling additive manufacturing of Al alloy:Toward complex large-scale high-performance components 被引量:2
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作者 Haibin Liu Run Hou +2 位作者 Chenghao Wu Ruishan Xie Shujun Chen 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS 2025年第2期425-438,共14页
At present,the emerging solid-phase friction-based additive manufacturing technology,including friction rolling additive man-ufacturing(FRAM),can only manufacture simple single-pass components.In this study,multi-laye... At present,the emerging solid-phase friction-based additive manufacturing technology,including friction rolling additive man-ufacturing(FRAM),can only manufacture simple single-pass components.In this study,multi-layer multi-pass FRAM-deposited alumin-um alloy samples were successfully prepared using a non-shoulder tool head.The material flow behavior and microstructure of the over-lapped zone between adjacent layers and passes during multi-layer multi-pass FRAM deposition were studied using the hybrid 6061 and 5052 aluminum alloys.The results showed that a mechanical interlocking structure was formed between the adjacent layers and the adja-cent passes in the overlapped center area.Repeated friction and rolling of the tool head led to different degrees of lateral flow and plastic deformation of the materials in the overlapped zone,which made the recrystallization degree in the left and right edge zones of the over-lapped zone the highest,followed by the overlapped center zone and the non-overlapped zone.The tensile strength of the overlapped zone exceeded 90%of that of the single-pass deposition sample.It is proved that although there are uneven grooves on the surface of the over-lapping area during multi-layer and multi-pass deposition,they can be filled by the flow of materials during the deposition of the next lay-er,thus ensuring the dense microstructure and excellent mechanical properties of the overlapping area.The multi-layer multi-pass FRAM deposition overcomes the limitation of deposition width and lays the foundation for the future deposition of large-scale high-performance components. 展开更多
关键词 aluminum alloy additive manufacturing SOLID-STATE friction stir welding multi-layer multi-pass
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基于XGBoost-LSTM-Informer的硫磺价格预测研究
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作者 张新生 李慧敏 《中国物价》 2026年第1期12-18,共7页
针对以硫磺为代表的大宗商品价格呈现非线性、非规律波动的特点,本研究创新性地提出XGBoost-LSTM-Informer深度学习组合模型。该模型的核心优势在于有效结合LSTM捕捉短期依赖的能力与Informer捕捉长期依赖的优势。本文以硫磺价格多因素... 针对以硫磺为代表的大宗商品价格呈现非线性、非规律波动的特点,本研究创新性地提出XGBoost-LSTM-Informer深度学习组合模型。该模型的核心优势在于有效结合LSTM捕捉短期依赖的能力与Informer捕捉长期依赖的优势。本文以硫磺价格多因素预测为案例,首先采用独立森林法对原始数据进行预处理,并结合皮尔逊相关系数法与XGBoost重要性对影响因素进行双重筛选。随后将融合后的数据集分别并行输入LSTM和Informer进行训练,并利用Optuna进行超参数调优,通过迭代训练输出模型最优预测结果。多组对比实验与消融实验表明,XGBoost-LSTM-Informer模型在预测精度上显著优于基准模型,既能准确反映硫磺价格整体波动趋势,也能及时捕捉局部价格波动细节。基于实验结果,本文从加强硫磺数据挖掘、引入模型辅助风险管理、构建硫磺价格预测体系三方面提出建议,为提升硫磺市场价格监测与风险管控能力提供理论支撑。 展开更多
关键词 长短期记忆神经网络 informer模型 多因素价格预测 硫磺价格 影响因素
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基于改进Informed-RRT^(*)算法的无人机三维路径规划
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作者 张森 庞岩 周福亮 《系统工程与电子技术》 北大核心 2026年第2期660-668,共9页
为满足无人机(unmanned aerial vehicle,UAV)的三维路径规划需求,针对基于启发信息的快速扩展随机树(informed rapidly-exploring random tree,Informed-RRT^(*))算法初始可行路径较长、优化效率低的问题,本文采用动态人工势场来引导树... 为满足无人机(unmanned aerial vehicle,UAV)的三维路径规划需求,针对基于启发信息的快速扩展随机树(informed rapidly-exploring random tree,Informed-RRT^(*))算法初始可行路径较长、优化效率低的问题,本文采用动态人工势场来引导树的生长,降低初始路径的长度;将采样区域限制在分层椭球中,根据障碍物疏密调整采样概率;使用前馈神经网络和遗传算法优化重连区域半径,以降低运行时间。仿真结果显示,在障碍物稀疏和密集环境中,改进算法得到的路径质量相较于Informed-RRT^(*)算法以及A^(*)算法更优,验证了本文算法在无人机三维路径规划中的实用性。 展开更多
关键词 路径规划 无人机 informed-RRT^(*) 动态人工势场
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Evolution of Smart Parks and Development of Park Information Modeling(PIM):Concept and Design Application 被引量:2
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作者 YANG Kaixian ZHEN Feng ZHANG Shanqi 《Chinese Geographical Science》 2025年第5期982-998,共17页
With the development of smart cities and smart technologies,parks,as functional units of the city,are facing smart transformation.The development of smart parks can help address challenges of technology integration wi... With the development of smart cities and smart technologies,parks,as functional units of the city,are facing smart transformation.The development of smart parks can help address challenges of technology integration within urban spaces and serve as testbeds for exploring smart city planning and governance models.Information models facilitate the effective integration of technology into space.Building Information Modeling(BIM)and City Information Modeling(CIM)have been widely used in urban construction.However,the existing information models have limitations in the application of the park,so it is necessary to develop an information model suitable for the park.This paper first traces the evolution of park smart transformation,reviews the global landscape of smart park development,and identifies key trends and persistent challenges.Addressing the particularities of parks,the concept of Park Information Modeling(PIM)is proposed.PIM leverages smart technologies such as artificial intelligence,digital twins,and collaborative sensing to help form a‘space-technology-system’smart structure,enabling systematic management of diverse park spaces,addressing the deficiency in park-level information models,and aiming to achieve scale articulation between BIM and CIM.Finally,through a detailed top-level design application case study of the Nanjing Smart Education Park in China,this paper illustrates the translation process of the PIM concept into practice,showcasing its potential to provide smart management tools for park managers and enhance services for park stakeholders,although further empirical validation is required. 展开更多
关键词 smart park smart city Park information Modeling(PIM) smart technology Building information Modeling(BIM) City information Modeling(CIM)
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基于Informer-SAO-LSTM的刀具磨损预测
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作者 李昂 马俊燕 唐源斌 《组合机床与自动化加工技术》 北大核心 2026年第1期151-155,161,共6页
在产品加工过程中,准确预测刀具的磨损值既能避免过早更换造成的成本浪费,又可防止过度磨损影响加工精度,从而最大化发挥刀具寿命的价值。为了解决这个问题,提出了一种基于Informer、SAO与LSTM结合的深度学习网络模型,用于刀具磨损预测... 在产品加工过程中,准确预测刀具的磨损值既能避免过早更换造成的成本浪费,又可防止过度磨损影响加工精度,从而最大化发挥刀具寿命的价值。为了解决这个问题,提出了一种基于Informer、SAO与LSTM结合的深度学习网络模型,用于刀具磨损预测。Informer具有高效的编码器结构和稀疏自注意力机制,而LSTM网络具有较强的时间序列建模能力,通过SAO算法对超参数的调整,可以更准确高效地捕捉刀具磨损过程中长期的依赖关系,从而提取更有效的特征,提升了模型在处理长序列数据时的效率和准确性。使用PHM2010数据集进行对比实验,实验结果表明所提出的Informer-SAO-LSTM模型在MAE、RMSE等多项指标上均表现出色,最后设计了实验进行验证,进一步说明了所提出的方法比对比模型的预测准确率更高,泛化能力更好。 展开更多
关键词 LSTM informER SAO 刀具磨损 深度学习 时间序列预测
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基于FDBO+Informer-ECANet的齿轮箱故障诊断分析
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作者 李婷婷 贾东 《机械传动》 北大核心 2026年第3期161-171,共11页
【目的】基于智能优化算法与深度神经网络的齿轮箱故障诊断方法逐渐成为研究热点,但仍然存在较多问题。为了解决强噪声环境下齿轮故障特征提取难、诊断准确率低的问题,提出一种基于融合增强型蜣螂优化(Fusion-enhanced Dung Beetle Opti... 【目的】基于智能优化算法与深度神经网络的齿轮箱故障诊断方法逐渐成为研究热点,但仍然存在较多问题。为了解决强噪声环境下齿轮故障特征提取难、诊断准确率低的问题,提出一种基于融合增强型蜣螂优化(Fusion-enhanced Dung Beetle Optimization,FDBO)算法、Informer模型和通道注意力机制(Efficient Channel Attention Network,ECANet)模块的齿轮箱故障诊断方法。【方法】首先,针对现有蜣螂优化(Dung Beetle Optimization,DBO)算法全局搜索能力不足、易陷入局部最优等问题,引入融合Fuch混沌映射兼逆反向学习策略、自适应步长策略与凸透镜成像反转策略集成、随机差异变异策略,提高算法的全局搜索能力;其次,基于Informer模型出色的长时间序列处理能力,高效提取出序列数据中的全局特征与局部特征;尤其针对包含长时间依赖关系的故障信号,该模型可展现出极高的分类性能;再次,在Informer模型的编辑器中引入ECANet模块,对Informer提取的特征进行通道级的自适应校准,提高模型对重要特征的关注度,以增强特征表达能力、减少噪声干扰;最后,通过FDBO算法对Informer-ECANet模型多个超参数进行寻优,确定最优参数组合,以增强模型的诊断能力和泛化性能。【结果】试验结果表明,在无噪声条件下,所提模型准确率达100%;在加入-6 dB的高斯白噪声下准确率仍达到94.4%,验证了所提模型的优越性,为齿轮箱故障诊断提供了一种新型有效的智能方法。 展开更多
关键词 融合增强型蜣螂优化算法 informer模型 ECANet模块 随机差异变异策略
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Exploration of augmented prompting methods for information extraction using large language models
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作者 Yishuo Fu Benfeng Xu +2 位作者 Mingxuan Du Quan Wang Zhendong Mao 《中国科学技术大学学报》 北大核心 2025年第7期15-24,14,I0001,共12页
Information extraction(IE)aims to automatically identify and extract information about specific interests from raw texts.Despite the abundance of solutions based on fine-tuning pretrained language models,IE in the con... Information extraction(IE)aims to automatically identify and extract information about specific interests from raw texts.Despite the abundance of solutions based on fine-tuning pretrained language models,IE in the context of fewshot and zero-shot scenarios remains highly challenging due to the scarcity of training data.Large language models(LLMs),on the other hand,can generalize well to unseen tasks with few-shot demonstrations or even zero-shot instructions and have demonstrated impressive ability for a wide range of natural language understanding or generation tasks.Nevertheless,it is unclear,whether such effectiveness can be replicated in the task of IE,where the target tasks involve specialized schema and quite abstractive entity or relation concepts.In this paper,we first examine the validity of LLMs in executing IE tasks with an established prompting strategy and further propose multiple types of augmented prompting methods,including the structured fundamental prompt(SFP),the structured interactive reasoning prompt(SIRP),and the voting-enabled structured interactive reasoning prompt(VESIRP).The experimental results demonstrate that while directly promotes inferior performance,the proposed augmented prompt methods significantly improve the extraction accuracy,achieving comparable or even better performance(e.g.,zero-shot FewNERD,FewNERD-INTRA)than state-of-theart methods that require large-scale training samples.This study represents a systematic exploration of employing instruction-following LLM for the task of IE.It not only establishes a performance benchmark for this novel paradigm but,more importantly,validates a practical technical pathway through the proposed prompt enhancement method,offering a viable solution for efficient IE in low-resource settings. 展开更多
关键词 prompt learning natural language processing few-shot information extraction zero-shot information extraction
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