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Open TBM Tunnel Intelligent Construction Technology 被引量:2
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作者 LIU Yongsheng CHEN Qiao +4 位作者 ZHANG Hepei LI Shu′ao LIN Chungang YIN Long LI Mengyu 《隧道建设(中英文)》 北大核心 2025年第4期816-833,I0025-I0042,共36页
To fully leverage the advantages of mechanization and informatization in tunnel boring machine(TBM)operations,the authors aim to promote the advancement of tunnel construction technology toward intelligent development... To fully leverage the advantages of mechanization and informatization in tunnel boring machine(TBM)operations,the authors aim to promote the advancement of tunnel construction technology toward intelligent development.This involved exploring the deep integration of next-generation artificial intelligence technologies,such as sensing technology,automatic control technology,big data technology,deep learning,and machine vision,with key operational processes,including TBM excavation,direction adjustment,step changes,inverted arch block assembly,material transportation,and operation status assurance.The results of this integration are summarized as follows.(1)TBM key excavation parameter prediction algorithm was developed with an accuracy rate exceeding 90%.The TBM intelligent step-change control algorithm,based on machine vision,achieved an image segmentation accuracy rate of 95%and gripper shoe positioning error of±5 mm.(2)An automatic positioning system for inverted arch blocks was developed,enabling real-time perception of the spatial position and deviation during the assembly process.The system maintains an elevation positioning deviation within±3 mm and a horizontal positioning deviation within±10 mm,reducing the number of surveyors in each work team.(3)A TBM intelligent rail transportation system that achieves real-time human-machine positioning,automatic switch opening and closing,automatic obstacle avoidance,intelligent transportation planning,and integrated scheduling and command was designed.Each locomotive formation reduces one shunter and improves comprehensive transportation efficiency by more than 20%.(4)Intelligent analysis and prediction algorithms were developed to monitor and predict the trends of the hydraulic and gear oil parameters in real time,enhancing the proactive maintenance and system reliability. 展开更多
关键词 TUNNEL open TBM intelligent construction deep learning machine vision
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A general Boolean semantic modelling approach for complex and intelligent industrial systems in the framework of DES
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作者 XU Changyi WANG Yun +1 位作者 DUAN Yiman ZHANG Chao 《Journal of Systems Engineering and Electronics》 SCIE CSCD 2024年第5期1219-1230,共12页
Discrete event system(DES)models promote system engineering,including system design,verification,and assessment.The advancement in manufacturing technology has endowed us to fabricate complex industrial systems.Conseq... Discrete event system(DES)models promote system engineering,including system design,verification,and assessment.The advancement in manufacturing technology has endowed us to fabricate complex industrial systems.Consequently,the adoption of advanced modeling methodologies adept at handling complexity and scalability is imperative.Moreover,industrial systems are no longer quiescent,thus the intelligent operations of the systems should be dynamically specified in the model.In this paper,the composition of the subsystem behaviors is studied to generate the complexity and scalability of the global system model,and a Boolean semantic specifying algorithm is proposed for generating dynamic intelligent operations in the model.In traditional modeling approaches,the change or addition of specifications always necessitates the complete resubmission of the system model,a resource-consuming and error-prone process.Compared with traditional approaches,our approach has three remarkable advantages:(i)an established Boolean semantic can be fitful for all kinds of systems;(ii)there is no need to resubmit the system model whenever there is a change or addition of the operations;(iii)multiple specifying tasks can be easily achieved by continuously adding a new semantic.Thus,this general modeling approach has wide potential for future complex and intelligent industrial systems. 展开更多
关键词 industrial complex system operation specifying Boolean semantic discrete event system(DES)theory intelligent operation
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冷藏肉中致病菌的三重ERA快速检测
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作者 杨艳歌 吴占文 +6 位作者 刘通 王帅 魏莹 赵健淞 李红娜 李涛 张峰 《华南理工大学学报(自然科学版)》 北大核心 2025年第4期135-146,共12页
肉类食品因富含营养,常成为微生物滋生的理想环境,即使在低温储存下,多数微生物也依然保持活性和保留部分毒力,故对肉类食品进行致病菌筛查至关重要。该研究基于酶促重组等温扩增技术(ERA),开发三重荧光ERA快速检测方法,并对方法的特异... 肉类食品因富含营养,常成为微生物滋生的理想环境,即使在低温储存下,多数微生物也依然保持活性和保留部分毒力,故对肉类食品进行致病菌筛查至关重要。该研究基于酶促重组等温扩增技术(ERA),开发三重荧光ERA快速检测方法,并对方法的特异性、灵敏度、检出限进行性能分析,然后对市售冷藏肉开展方法的适用性验证,并与行业标准SN/T 1870—2016实时荧光聚合酶链式反应(PCR)方法进行结果比对。结果显示:成功构建了一种针对冷藏肉类中的沙门氏菌、金黄色葡萄球菌、单核细胞增生李斯特氏菌3种关键致病菌的三重荧光ERA快速检测方法;经过优化,该方法能在12 min内通过单次反应同时完成3种致病菌的快速检测;最低检出限低至10^(-3)ng/μL;对于人工模拟污染样品,经过6 h的前增菌,采用该方法可同时检出污染量为1 CFU/m L的3种致病菌;对市售冷藏肉品的抽检结果显示,金黄色葡萄球菌检出率为19.35%,沙门氏菌检出率为12.90%,单核细胞增生李斯特氏菌检出率为6.45%,与行业标准SN/T 1870—2016的检测结果吻合,充分证明了该方法的准确性与适用性。该研究不仅有助于降低食源性致病菌引发的疾病风险,还可为未来食源性致病菌现场快速检测提供坚实的技术支撑。 展开更多
关键词 冷藏肉品 食源性致病菌 三重荧光era 快速检测
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基于BP神经网络结合ERA5数据的风电功率预测 被引量:1
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作者 王婷婷 李斯胜 +4 位作者 于伟 能锋田 李星南 杨佳琳 熊亮 《储能科学与技术》 北大核心 2025年第1期183-189,共7页
随着我国风力发电技术的不断发展和完善,风电在电力系统运行和调度的作用越来越突出。为了高效准确地预测风电功率,减少大量风电入网带来的负面影响,本文基于BP神经网络结合ERA5数据对我国北方某风电场进行风电功率预测,并采用粒子群优... 随着我国风力发电技术的不断发展和完善,风电在电力系统运行和调度的作用越来越突出。为了高效准确地预测风电功率,减少大量风电入网带来的负面影响,本文基于BP神经网络结合ERA5数据对我国北方某风电场进行风电功率预测,并采用粒子群优化(particle swarm algorithm,PSO)算法优化模型,结合平均绝对误差、均方根误差和Pearson相关系数分析风电功率预测效果。结果表明,模型训练集中预测与实测风电功率变化趋势基本一致,呈现同增同减的趋势,BP模型的平均绝对误差为702.12 W,均方根误差为1000.18 W,相关系数为0.91,PSO-BP模型的平均绝对误差为700.75 W,均方根误差为995.16 W,相关系数为0.94;测试集中ERA5数据在一定程度上高估了风电功率,但整体趋势基本一致,BP模型的平均绝对误差为861.09 W,均方根误差为1150.86 W,相关系数为0.81;PSO-BP模型的平均绝对误差为829.55 W,均方根误差为1117.39 W,相关系数为0.83,模型的预测效果相对较好,PSO-BP模型相较于BP模型的预测效果均有一定程度的提高,在该区域的风电功率预测方面有较好的适用性。研究结果可为缺乏观测数据或观测数据质量不高的地区预测风电功率提供参考。 展开更多
关键词 风力发电 BP神经网络 era5再分析资料 粒子群优化算法 风电功率预测
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Artificial intelligence models based on non-contrast chest CT for measuring bone mineral density 被引量:1
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作者 DUAN Wei YANG Guoqing +6 位作者 LI Yang SHI Feng YANG Lian XIONG Xin CHEN Bei LI Yong FU Quanshui 《中国医学影像技术》 CSCD 北大核心 2024年第8期1231-1235,共5页
Objective To observe the value of artificial intelligence(AI)models based on non-contrast chest CT for measuring bone mineral density(BMD).Methods Totally 380 subjects who underwent both non-contrast chest CT and quan... Objective To observe the value of artificial intelligence(AI)models based on non-contrast chest CT for measuring bone mineral density(BMD).Methods Totally 380 subjects who underwent both non-contrast chest CT and quantitative CT(QCT)BMD examination were retrospectively enrolled and divided into training set(n=304)and test set(n=76)at a ratio of 8∶2.The mean BMD of L1—L3 vertebrae were measured based on QCT.Spongy bones of T5—T10 vertebrae were segmented as ROI,radiomics(Rad)features were extracted,and machine learning(ML),Rad and deep learning(DL)models were constructed for classification of osteoporosis(OP)and evaluating BMD,respectively.Receiver operating characteristic curves were drawn,and area under the curves(AUC)were calculated to evaluate the efficacy of each model for classification of OP.Bland-Altman analysis and Pearson correlation analysis were performed to explore the consistency and correlation of each model with QCT for measuring BMD.Results Among ML and Rad models,ML Bagging-OP and Rad Bagging-OP had the best performances for classification of OP.In test set,AUC of ML Bagging-OP,Rad Bagging-OP and DL OP for classification of OP was 0.943,0.944 and 0.947,respectively,with no significant difference(all P>0.05).BMD obtained with all the above models had good consistency with those measured with QCT(most of the differences were within the range of Ax-G±1.96 s),which were highly positively correlated(r=0.910—0.974,all P<0.001).Conclusion AI models based on non-contrast chest CT had high efficacy for classification of OP,and good consistency of BMD measurements were found between AI models and QCT. 展开更多
关键词 OSTEOPOROSIS bone density tomography X-ray computed artificial intelligence
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AN INTELLIGENT DECISION SUPPORT SYSTEM (IDSS) IN THE OPERATION PROCESS OF ELECTRIC FURNACE FOR CLEANING SLAG 被引量:1
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作者 Peng Xiaoqi Mei Chi Zhou Jiemin(Department of Applied Physics and Heat Engineering, Central South University of Technology, Changsha 410083,China) 《Journal of Central South University》 SCIE EI CAS 1996年第2期74-77,共4页
In this paper, the structure and function of the IDSS in the operation process of electric furnace for cleaning slag are presented and the fuzzy neural network decision model (FNNDM) in the IDSS is specially suggested... In this paper, the structure and function of the IDSS in the operation process of electric furnace for cleaning slag are presented and the fuzzy neural network decision model (FNNDM) in the IDSS is specially suggested. The IDSS possesses selflearning and adaptive properties, and has been used for managing and analyzing the optimal operational conditions since June 1992. Electric energy consumption has been reduced remarkably and the coefficient of recovery of cobalt and nickel has been increased. 展开更多
关键词 fuzzy neural network ELECTRIC FURNACE for CLEANING SLAG intelligent DECISION support system
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CBA: multi source fusion model for fast and intelligent target intention identification
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作者 WAN Shichang LI Qingshan +1 位作者 WANG Xuhua LU Nanhua 《Journal of Systems Engineering and Electronics》 SCIE CSCD 2024年第2期406-416,共11页
How to mine valuable information from massive multisource heterogeneous data and identify the intention of aerial targets is a major research focus at present. Aiming at the longterm dependence of air target intention... How to mine valuable information from massive multisource heterogeneous data and identify the intention of aerial targets is a major research focus at present. Aiming at the longterm dependence of air target intention recognition, this paper deeply explores the potential attribute features from the spatiotemporal sequence data of the target. First, we build an intelligent dynamic intention recognition framework, including a series of specific processes such as data source, data preprocessing,target space-time, convolutional neural networks-bidirectional gated recurrent unit-atteneion (CBA) model and intention recognition. Then, we analyze and reason the designed CBA model in detail. Finally, through comparison and analysis with other recognition model experiments, our proposed method can effectively improve the accuracy of air target intention recognition,and is of significance to the commanders’ operational command and situation prediction. 展开更多
关键词 INTENTION massive data deep network artificial intelligence
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An intelligent control method based on artificial neural network for numerical flight simulation of the basic finner projectile with pitching maneuver
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作者 Yiming Liang Guangning Li +3 位作者 Min Xu Junmin Zhao Feng Hao Hongbo Shi 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第2期663-674,共12页
In this paper,an intelligent control method applying on numerical virtual flight is proposed.The proposed algorithm is verified and evaluated by combining with the case of the basic finner projectile model and shows a... In this paper,an intelligent control method applying on numerical virtual flight is proposed.The proposed algorithm is verified and evaluated by combining with the case of the basic finner projectile model and shows a good application prospect.Firstly,a numerical virtual flight simulation model based on overlapping dynamic mesh technology is constructed.In order to verify the accuracy of the dynamic grid technology and the calculation of unsteady flow,a numerical simulation of the basic finner projectile without control is carried out.The simulation results are in good agreement with the experiment data which shows that the algorithm used in this paper can also be used in the design and evaluation of the intelligent controller in the numerical virtual flight simulation.Secondly,combined with the real-time control requirements of aerodynamic,attitude and displacement parameters of the projectile during the flight process,the numerical simulations of the basic finner projectile’s pitch channel are carried out under the traditional PID(Proportional-Integral-Derivative)control strategy and the intelligent PID control strategy respectively.The intelligent PID controller based on BP(Back Propagation)neural network can realize online learning and self-optimization of control parameters according to the acquired real-time flight parameters.Compared with the traditional PID controller,the concerned control variable overshoot,rise time,transition time and steady state error and other performance indicators have been greatly improved,and the higher the learning efficiency or the inertia coefficient,the faster the system,the larger the overshoot,and the smaller the stability error.The intelligent control method applying on numerical virtual flight is capable of solving the complicated unsteady motion and flow with the intelligent PID control strategy and has a strong promotion to engineering application. 展开更多
关键词 Numerical virtual flight intelligent control BP neural network PID Moving chimera grid
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ERA5对拉曼激光雷达水汽反演的标定与分析
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作者 王雯慧 曹念文 《激光与红外》 北大核心 2025年第1期120-129,共10页
在探测大气水汽方面,拉曼激光雷达是精度较高的探测方法。探空资料经常用来对拉曼激光雷达反演水汽进行标定和对比分析,但是探空资料在时间和空间上具有局限性,在无探空数据时,拉曼激光雷达的标定和反演受限。ERA5再分析资料与探空资料... 在探测大气水汽方面,拉曼激光雷达是精度较高的探测方法。探空资料经常用来对拉曼激光雷达反演水汽进行标定和对比分析,但是探空资料在时间和空间上具有局限性,在无探空数据时,拉曼激光雷达的标定和反演受限。ERA5再分析资料与探空资料的相似度较高,时空分辨率比探空数据高。对安徽地区ERA5水汽混合比数据的适用性进行了分析,结果表明在安徽两个探空站ERA5资料与探空资料的水汽混合比相关性较好,整体偏差较小。因此在无探空数据的合肥地区,选择ERA5再分析资料作为参考数据,对拉曼激光雷达反演水汽混合比进行标定。将标定常数代入水汽混合比的反演公式,得到水汽混合比在高度上的垂直廓线,将反演结果与探空站插值得到的合肥水汽混合比廓线进行对比分析,在0.5~1.5 km高度内,相对误差大概在-15%~7%范围内。结果表明拉曼激光雷达反演的水汽混合比与探空站插值得到的合肥水汽混合比具有较好的一致性,验证了ERA5资料对拉曼激光雷达反演水汽混合比标定的可行性。 展开更多
关键词 拉曼激光雷达 水汽混合比 era5再分析资料 探空资料
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Research on Multi-modal In-Vehicle Intelligent Personal Assistant Design
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作者 WANG Jia-rou TANG Cheng-xin SHUAI Liang-ying 《印刷与数字媒体技术研究》 CAS 北大核心 2024年第4期136-146,共11页
Intelligent personal assistants play a pivotal role in in-vehicle systems,significantly enhancing life efficiency,driving safety,and decision-making support.In this study,the multi-modal design elements of intelligent... Intelligent personal assistants play a pivotal role in in-vehicle systems,significantly enhancing life efficiency,driving safety,and decision-making support.In this study,the multi-modal design elements of intelligent personal assistants within the context of visual,auditory,and somatosensory interactions with drivers were discussed.Their impact on the driver’s psychological state through various modes such as visual imagery,voice interaction,and gesture interaction were explored.The study also introduced innovative designs for in-vehicle intelligent personal assistants,incorporating design principles such as driver-centricity,prioritizing passenger safety,and utilizing timely feedback as a criterion.Additionally,the study employed design methods like driver behavior research and driving situation analysis to enhance the emotional connection between drivers and their vehicles,ultimately improving driver satisfaction and trust. 展开更多
关键词 intelligent personal assistants Multi-modal design User psychology In-vehicle interaction Voice interaction Emotional design
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Intelligent decision support system of operation-optimization in copper smelting converter 被引量:1
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作者 姚俊峰 梅炽 +2 位作者 彭小奇 周安梁 吴冬华 《Journal of Central South University of Technology》 2002年第2期138-141,共4页
An artificial intelligence technique was applied to the optimization of flux adding systems and air blasting systems, the display of on line parameters, forecasting of mass and compositions of slag in the slagging per... An artificial intelligence technique was applied to the optimization of flux adding systems and air blasting systems, the display of on line parameters, forecasting of mass and compositions of slag in the slagging period, optimization of cold material adding systems and air blasting systems, the display of on line parameters, and the forecasting of copper mass in the copper blow period in copper smelting converters. They were integrated to build the Intelligent Decision Support System of the Operation Optimization of Copper Smelting Converter(IDSSOOCSC), which is self learning and self adaptating. Development steps, monoblock structure and basic functions of the IDSSOOCSC were introduced. After it was applied in a copper smelting converter, every production quota was clearly improved after IDSSOOCSC had been run for 4 months. Blister copper productivity is increased by 6%, processing load of cold input is increased by 8% and average converter life span is improved from 213 to 235 furnace times. 展开更多
关键词 intelligent decision support system neural network pattern identification chaos genetic algorithm operation optimization copper smelting converter
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Energy-efficient joint UAV secure communication and 3D trajectory optimization assisted by reconfigurable intelligent surfaces in the presence of eavesdroppers
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作者 Huang Hailong Mohsen Eskandari +1 位作者 Andrey V.Savkin Wei Ni 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第1期537-543,共7页
We consider a scenario where an unmanned aerial vehicle(UAV),a typical unmanned aerial system(UAS),transmits confidential data to a moving ground target in the presence of multiple eavesdroppers.Multiple friendly reco... We consider a scenario where an unmanned aerial vehicle(UAV),a typical unmanned aerial system(UAS),transmits confidential data to a moving ground target in the presence of multiple eavesdroppers.Multiple friendly reconfigurable intelligent surfaces(RISs) help to secure the UAV-target communication and improve the energy efficiency of the UAV.We formulate an optimization problem to minimize the energy consumption of the UAV,subject to the mobility constraint of the UAV and that the achievable secrecy rate at the target is over a given threshold.We present an online planning method following the framework of model predictive control(MPC) to jointly optimize the motion of the UAV and the configurations of the RISs.The effectiveness of the proposed method is validated via computer simulations. 展开更多
关键词 Unmanned aerial systems(UASs) Unmanned aerial vehicle(UAV) Communication security Eaves-dropping Reconfigurable intelligent surfaces(RIS) Autonomous navigation and placement Path planning Model predictive control
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Intelligent vehicle lateral controller design based on genetic algorithmand T-S fuzzy-neural network
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作者 RuanJiuhong FuMengyin LiYibin 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2005年第2期382-387,共6页
Non-linearity and parameter time-variety are inherent properties of lateral motions of a vehicle. How to effectively control intelligent vehicle (IV) lateral motions is a challenging task. Controller design can be reg... Non-linearity and parameter time-variety are inherent properties of lateral motions of a vehicle. How to effectively control intelligent vehicle (IV) lateral motions is a challenging task. Controller design can be regarded as a process of searching optimal structure from controller structure space and searching optimal parameters from parameter space. Based on this view, an intelligent vehicle lateral motions controller was designed. The controller structure was constructed by T-S fuzzy-neural network (FNN). Its parameters were searched and selected with genetic algorithm (GA). The simulation results indicate that the controller designed has strong robustness, high precision and good ride quality, and it can effectively resolve IV lateral motion non-linearity and time-variant parameters problem. 展开更多
关键词 intelligent vehicle genetic algorithm fuzzy-neural network lateral control robustness.
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再分析降水数据ERA5在江淮流域的精确性评估
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作者 庄诚 滑申冰 +3 位作者 刘晓琳 姚德贵 李哲 朱德华 《水电能源科学》 北大核心 2025年第2期38-43,共6页
基于江淮流域1961~2018年71个地面站点逐日降水资料,对再分析降水数据ERA5进行性能评估。结果表明,ERA5对雨日的探测能力良好,其中年尺度的探测性能优于季尺度,季尺度的探测性能优于月尺度。在各个尺度上,公正先兆评分均大于0,说明ERA5... 基于江淮流域1961~2018年71个地面站点逐日降水资料,对再分析降水数据ERA5进行性能评估。结果表明,ERA5对雨日的探测能力良好,其中年尺度的探测性能优于季尺度,季尺度的探测性能优于月尺度。在各个尺度上,公正先兆评分均大于0,说明ERA5对雨日的预报是成功的;ERA5可以重现逐月、逐季和年尺度的降水量,且在各个尺度上都存在高估多于低估的情况,并且线性关系良好;ERA5的年降水总量、最大5 d降水量、异常降水总量和极端降水总量在2000年之前先是被高估,后来逐渐演变为被低估,且低估值越来越大;最大1 d降水量则一直被低估,且低估值越来越大。 展开更多
关键词 era5 极端降水 性能评估指标 江淮流域
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An Intelligent Decision Support System Generator
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作者 Shi Zhenxia and Lu JukangDept. of Computer Science, Shanghai Univ. of Science and Technology, Shanghai 201800, P.R. China 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 1993年第1期45-52,共8页
The focus of this paper is on a new concept framework and an architecture of an intelligent decision support syetem generator (DSSG). The framework results from a synthesis of two existing frameworks: Spragae and Bonc... The focus of this paper is on a new concept framework and an architecture of an intelligent decision support syetem generator (DSSG). The framework results from a synthesis of two existing frameworks: Spragae and Bonczek, while the architecture is a rooted partial order network. From our experience which comes out of the project of DSSG, we consider that they are keys of further research and development of DSS. 展开更多
关键词 Decision support system Decision support system generator intelligent decision support system AI technology Hypertext technology.
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Research Status of High-Entropy Alloys Based on Artificial Intelligence Technology
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作者 YU Zhiqi ZHAO Yanchun +5 位作者 XUE Baorui DANG Wenxia MA Huwen SU Yu LAN Yunbo FENG Li 《有色金属(中英文)》 北大核心 2025年第5期735-747,共13页
High-Entropy Alloys(HEAs)exhibit significant potential across multiple domains due to their unique properties.However,conventional research methodologies face limitations in composition design,property prediction,and ... High-Entropy Alloys(HEAs)exhibit significant potential across multiple domains due to their unique properties.However,conventional research methodologies face limitations in composition design,property prediction,and process optimization,characterized by low efficiency and high costs.The integration of Artificial Intelligence(AI)technologies has provided innovative solutions for HEAs research.This review presented a detailed overview of recent advancements in AI applications for structural modeling and mechanical property prediction of HEAs.Furthermore,it discussed the advantages of big data analytics in facilitating alloy composition design and screening,quality control,and defect prediction,as well as the construction and sharing of specialized material databases.The paper also addressed the existing challenges in current AI-driven HEAs research,including issues related to data quality,model interpretability,and cross-domain knowledge integration.Additionally,it proposed prospects for the synergistic development of AI-enhanced computational materials science and experimental validation systems. 展开更多
关键词 high-entropy alloys artificial intelligence structural modeling mechanical property big data
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Development status and prospect of cold chain logistics of fruits,vegetables,and agricultural products based on intelligent technology
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作者 ZHANG Ruizhi LIU Qianyuan +3 位作者 HUANG Yuying LIU Bing CHANG Zhiguang WANG Jiaoling 《智能化农业装备学报(中英文)》 2024年第3期63-74,共12页
The cold chain in the production area of fruits and vegetables is the primary link to reduce product loss and improve product quality,but it is also a weak link.With the application of big data technology in cold chai... The cold chain in the production area of fruits and vegetables is the primary link to reduce product loss and improve product quality,but it is also a weak link.With the application of big data technology in cold chain logistics,intelligent devices,and technologies have become important carriers for improving the efficiency of cold chain logistics in fruit and vegetable production areas,extending the shelf life of fruits and vegetables,and reducing fruit and vegetable losses.They have many advantages in fruit and vegetable pre-cooling,sorting and packaging,testing,warehousing,transportation,and other aspects.This article summarizes the rapidly developing and widely used intelligent technologies at home and abroad in recent years,including automated guided vehicle intelligent handling based on electromagnetic or optical technology,intelligent sorting based on sensors,electronic optics,and other technologies,intelligent detection based on computer vision technology,intelligent transportation based on perspective imaging technology,etc.It analyses and studies the innovative research and achievements of various scholars in applying intelligent technology in fruit and vegetable cold chain storage,sorting,detection,transportation,and other links,and improves the efficiency of fruit and vegetable cold chain logistics.However,applying intelligent technology in fruit and vegetable cold chain logistics also faces many problems.The challenges of high cost,difficulty in technological integration,and talent shortages have limited the development of intelligent technology in the field of fruit and vegetable cold chains.To solve the current problems,it is proposed that costs be controlled through independent research and development,technological innovation,and other means to lower the entry threshold for small enterprises.Strengthen integrating intelligent technology and cold chain logistics systems to improve data security and system compatibility.At the same time,the government should introduce relevant policies,provide necessary financial support,and establish talent training mechanisms.Accelerate the development and improvement of intelligent technology standards in the field of cold chain logistics.Through technological innovation,cost control,talent cultivation,and policy guidance,we aim to promote the upgrading of the agricultural industry and provide ideas for improving the quality and efficiency of fruit and vegetable cold chain logistics. 展开更多
关键词 fruits and vegetables cold chain logistics automated guided vehicle intelligent handling computer vision spectral detection
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基于Intelligent Agent的智能电子商务
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作者 钟国祥 《计算机科学》 CSCD 北大核心 2004年第5期65-68,共4页
近年来,网络普及使得电子商务技术得到了长足的发展,但仍存在着很多问题。特别是智能和个性化的电子商务已经成了人们追求的目标。本文试图将Agent技术运用于电子商务系统中,介绍了基于Intelligent Agent的智能电子商务系统的基本概念... 近年来,网络普及使得电子商务技术得到了长足的发展,但仍存在着很多问题。特别是智能和个性化的电子商务已经成了人们追求的目标。本文试图将Agent技术运用于电子商务系统中,介绍了基于Intelligent Agent的智能电子商务系统的基本概念及目前智能电子商务的发展状况,并就Intelligent Agent的智能电子商务系统的未来发展提出了问题和建议。 展开更多
关键词 intelligent AGENT 智能 电子商务 网络环境 虚拟世界
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中国区域ERA5-ZTD/PWV精度评估与台风事件响应研究 被引量:1
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作者 连达军 何琦敏 +2 位作者 李黎 富尔江 张克非 《灾害学》 CSCD 北大核心 2024年第1期23-28,共6页
再分析数据能够提供多种历史气象数据同化产品,为了评估欧洲中期天气预报中心的最新一代ERA5再分析数据集估计的天顶对流层延迟(Zenith Tropospheric Delay,ZTD)和大气可降水量(Precipitable Water Vapor,PWV)产品在中国区域的精度,利用... 再分析数据能够提供多种历史气象数据同化产品,为了评估欧洲中期天气预报中心的最新一代ERA5再分析数据集估计的天顶对流层延迟(Zenith Tropospheric Delay,ZTD)和大气可降水量(Precipitable Water Vapor,PWV)产品在中国区域的精度,利用2017—2019年中国区域内14个全球导航卫星系统地面监测站和89个探空站反演的ZTD和PWV数据分别对ERA5-ZTD和ERA5-PWV精度进行了评估。结果表明,除青藏地区的站点外,ERA5-ZTD的精度分布较为均匀,平均Bias、RMSE和STD分别为-6.3 mm、19.3 mm和17.5 mm;ERA5-PWV的精度分布呈现西部内陆高和东南沿海低的趋势,平均Bias、RMSE和STD分别为0.3 mm,2.9 mm和2.7 mm。此外,在研究2019年“利奇马”台风期间ZTD和PWV的时空分布中,提出了使用水汽到达时间差的方法定量估计台风的水汽移动速度。得到台风期间ZTD和PWV具有相同的空间分布规律,且移动方向与台风的移动路径方向是一致的,估计的水汽平均移动速度为12.4 km/h,与台风的平均移动速度16.1 km/h非常接近。因此,ERA5-ZTD/PWV在中国区域内具有较高的精度,ZTD和PWV可作为重要气象因子为台风的预警预报研究提供重要参考。 展开更多
关键词 era5 全球导航卫星系统 对流层延迟 水汽 台风
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基于ERA5再分析数据的伊犁河流域干旱灾害风险评估与区划 被引量:1
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作者 穆振侠 田晓杰 +1 位作者 张玉祥 李子龙 《水电能源科学》 北大核心 2024年第8期28-32,共5页
依据ERA5再分析数据的分布特点,以0.25°×0.25°的网格为旱灾风险评估的基本单元,从危险性、脆弱性、易损性和防灾减灾能力4个方面选取12个指标,采用AHP-熵值法确定指标权重,对基础数据资料匮乏的伊犁河流域构建干旱灾害... 依据ERA5再分析数据的分布特点,以0.25°×0.25°的网格为旱灾风险评估的基本单元,从危险性、脆弱性、易损性和防灾减灾能力4个方面选取12个指标,采用AHP-熵值法确定指标权重,对基础数据资料匮乏的伊犁河流域构建干旱灾害风险指数模型,进行干旱灾害风险评估与区划。结果表明,分时段校正后的ERA5再分析降水数据精度显著提高,可用于干旱灾害风险评估;次高、高危险性区域主要分布在研究区西北部和东北部,次高、高脆弱性区域主要分布在海拔较高的山区,次高、高易损性区域主要分布在伊宁市及周边地区,次高、高防灾减灾能力主要分布在研究区西北部,分别占研究区总面积的33.45%、31.04%、16.13%、15.09%;旱灾风险区划图显示,低、次低风险区主要分布在研究区西南部,次高、高风险区主要分布在研究区西北部,分别占研究区总面积的44.69%、22.53%。 展开更多
关键词 era5再分析数据 旱灾 风险分析 风险评估
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