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Temperature field prediction of steel-concrete composite decks using TVFEMD-stacking ensemble algorithm

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第9期25卷 732-748页

作者： Benkun TAN Da WANG jialin shi Lianqi ZHANG School of Civil Engineering Changsha University of Science&TechnologyChangsha 410114China School of Civil and Architecture Engineering Hunan University of Arts and ScienceChangde 415000China School of Civil Engineering Central South University of Forestry and TechnologyChangsha 410004China

This research aims to develop an advanced deep learning-based ensemble algorithm,utilizing environmental temperature and solar radiation as feature factors,to conduct hourly temperature field predictions for steel-concrete composite decks(SCCDs).The proposed model comprises feature parameter lag selection,two non-stationary time series decomposition methods(empirical mode decomposition(EMD)and time-varying filtering-based empirical mode decomposition(TVFEMD)),and a stacking ensemble prediction *** validate the proposed model,five machine learning(ML)models(random forest(RF),support vector regression(SVR),multilayer perceptron(MLP),gradient boosting regression(GBR),and extreme gradient boosting(XGBoost))were tested as base learners and evaluations were conducted within independent,mixed,and ensemble ***,predictions are made based on engineering *** results indicate that consideration of lag variables and modal decomposition can significantly improve the prediction performance of learners,and the stacking framework,which combines multiple learners,achieves superior prediction *** proposed method demonstrates a high degree of predictive robustness and can be applied to statistical analysis of the temperature field in *** time lag features helps account for the delayed heat dissipation phenomenon in concrete,while decomposition techniques assist in feature extraction.

关键词： Steel-concrete composite deck(SCCD) Temperature field Time-varying filtering-based empirical mode decomposition(TVFEMD) Feature selection Machine learning(ML)

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Extraction algorithm for longitudinal and transverse mechanical information of AFM

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Nanotechnology and Precision Engineering 2022年第2期5卷 27-37页

作者： Chunxue Hao Shoujin Wang Shuai Yuan Boyu Wu Peng Yu jialin shi School of Information and Control Engineering Shenyang Jianzhu UniversityShenyang 110168China State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016China Institute of Robotics and Intelligent Manufacturing Innovation Chinese Academy of SciencesShenyang 110169China

The atomic force microscope(AFM)can measure nanoscale morphology and mechanical properties and has a wide range of *** traditional method for measuring the mechanical properties of a sample does so for the longitudinal and transverse properties separately,ignoring the coupling between *** this paper,a data processing and multidimensional mechanical information extraction algorithm for the composite mode of peak force tapping and torsional resonance is *** the basis of a tip–sample interaction model for the AFM,longitudinal peak force data are used to decouple amplitude and phase data of transverse torsional resonance,accurately identify the tip–sample longitudinal contact force in each peak force cycle,and synchronously obtain the corresponding characteristic images of the transverse amplitude and *** results show that the measured longitudinal mechanical characteristics are consistent with the transverse amplitude and phase characteristics,which verifies the effectiveness of the ***,a new method is provided for the measurement of multidimensional mechanical characteristics using the AFM.

关键词： Atomic force microscope Peak force tapping Torsional resonance Mechanical characteristic measurement Background subtraction algorithm Coupled mechanical model

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Resistivity response of coal under hydraulic fracturing with different injection rates:A laboratory study

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International Journal of Mining Science and Technology 2022年第4期32卷 807-819页

作者： Mingyang Song Quangui Li Qianting Hu Yanqing Wu Guanhua Ni Yangcheng Xu Yuebing Zhang Liangping Hu jialin shi Jichuan Liu Yize Deng State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China School of Resources and Safety Engineering Chongqing UniversityChongqing 400044China College of Safety and Environmental Engineering Shandong University of Science and TechnologyQingdao 266510China

Resistivity will have different response characteristics to the hydraulic fracture propagation process. In this work, a resistivity testing system for hydraulic fracturing specimens was established. Resistivity and acoustic emission(AE) information were jointly analysed to determine the dynamic response characteristics of resistivity during hydraulic fracture propagation. The results show that the water and fracture exert a competitive influence on the connection structure of the circuit, and there are two significant peak resistivity points in the curve, presenting a double peak therein. The peak resistivity data of the specimen with a larger fracture area are much different from the initial value. With the increase of the rate of injection, the range of variation of the highest value that can be reached with the specimen resistivity decreases. High resistivity rates or high resistivity fluctuations exhibit rapid a release of fracture energy. The fracture failure mode dominated by shear fractures makes the formation produce a “series+parallel” electrical connection structure;a calculation model of formation resistivity based on shear and tensile failure was proposed to characterize the proportion of different types of hydraulic fractures and elucidate the control effect of matrix resistivity on the electrical performance of the overall circuit structure.

关键词： Resistivity Hydraulic fracturing Injection rate Fracture extension Acoustic emission

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Frontiers of CO_(2)Capture and Utilization(CCU)towards Carbon Neutrality

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Advances in Atmospheric Sciences 2022年第8期39卷 1252-1270页

作者： Lingyun ZHANG Yanfang SONG jialin shi Qun SHEN Deng HU Qiang GAO Wei CHEN Kien-Woh KOW Chengheng PANG Nannan SUN Wei WEI CAS Key Laboratory of Low-Carbon Conversion Science&Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Department of Chemical and Environmental Engineering Faculty of Science and EngineeringUniversity of Nottingham Ningbo ChinaNingbo 315100China Key Laboratory for Carbonaceous Wastes Processing and Process Intensification Research of Zhejiang Province University of Nottingham Ningbo ChinaNingbo 315100China New Materials Institute the University of Nottingham Ningbo ChinaNingbo 315100China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

CO_(2)capture,utilization,and storage(CCUS)technology is a rare option for the large-scale use of fossil fuels in a low-carbon way,which will definitely play a part in the journey towards carbon *** the CCUS nexus,CCU is especially interesting because these processes will establish a new“atmosphere-to-atmosphere”carbon cycle and thus indirectly offer huge potential in carbon *** study focuses on the new positioning of CCUS in the carbon neutrality scenario and aims to identify potential cutting-edge/disruptive CCU technologies that may find important application opportunities during the decarbonization of the energy and industrial *** this end,direct air capture(DAC),flexible metal-framework materials(MOFs)for CO_(2)capture,integrated CO_(2)capture and conversion(ICCC),and electrocatalytic CO_(2)reduction(ECR)were selected,and their general introduction,the importance to carbon neutrality,and most up-to-date research progress are summarized.

关键词： carbon neutrality carbon reduction decarbonization CO_(2) CCU

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Carboxylation of terminal alkynes with CO2 over Ag loaded ZIF-8

Carboxylation of terminal alkynes with CO2 over Ag loaded ZI...

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中国化学会·第一届全国二氧化碳资源化利用学术会议

作者： jialin shi Lina Zhang Zhongzheng Zhang Nannan Sun Wei Wei CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute Chinese Academy of Science School of Physical Science and Technology Shanghai Tech University

Herein we report the direct carboxylation of terminal alkynes with CO(CTACO) by its insertion into the C(sp)-H bond over a Ag loaded ZIF-8 catalyst(Figure 1). The catalysts could be rapidly prepared by exchanging the Zn(II) ions in ZIF-8 by Ag(I) ions in methanolic solution. Reduction of the exchanged Ag(I) enabled the formation of highly dispersed metallic nano-particles, and the crystalline structure of ZIF-8 stayed intact. This guaranteed the preservation of advantages of the parent ZIF-8, e.g. high stability and more importantly, high porosity. N adsorption experiments indicated that the Ag@Z8 catalysts possessed large surface areas(over 1000 m/g), which is important for enriching CO on the surface and facilitate its conversion. Consequently, very good yield of 3-phenylpropiolic acid could be achieved at mild conditions(Figure 1 d).

关键词： MOF catalyze carboxylation of terminal alkynes CO2 utilization

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天津环城4区现代渔业现状分析与发展思路

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中国农业资源与区划 2010年第6期31卷 84-90页

作者：史佳林李瑾天津市农村经济与区划研究所

渔业是天津农业的重要组成部分和农业经济增长点,在进行农业结构调整的过程中,天津越来越重视渔业开发建设,提出建设以设施渔业、生态渔业和休闲观光渔业为核心的沿海都市型现代渔业的发展目标。该文对天津环城4区渔业资源禀赋和产业发... 详细信息

渔业是天津农业的重要组成部分和农业经济增长点,在进行农业结构调整的过程中,天津越来越重视渔业开发建设,提出建设以设施渔业、生态渔业和休闲观光渔业为核心的沿海都市型现代渔业的发展目标。该文对天津环城4区渔业资源禀赋和产业发展状况进行了分析与评价,在构建生态休闲型现代渔业体系的框架下,有针对性地指明了4区现代渔业的发展方向与定位,并提出了促进四区现代渔业可持续发展的对策建议。

关键词：天津环城4区现代渔业现状分析发展思路

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CNPC Enhances Control on Petrochem Pollution

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China Oil & Gas 1998年第1期5卷 59-60页

作者： Wu Fangyun Zhang Wei Wang jialin and shi Fang(Development Centre for Environmental Engineering Research, University of Petroleum)

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VFP编程技巧研究

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电脑编程技巧与维护 2012年第12期 40-41,44页

作者：史嘉林天津市河西区职工大学天津300203

VFP是一种被十分广泛应用于数据库的相关管理系统,其支持与提供面向过程中的相关程序设计。通过借助VFP的对象模型,进行面向对象程序设计的继承性、封装性、多态性以及子类等等方面的功能应用。VFP有着强大的数据处理功能、友好的图形... 详细信息

VFP是一种被十分广泛应用于数据库的相关管理系统,其支持与提供面向过程中的相关程序设计。通过借助VFP的对象模型,进行面向对象程序设计的继承性、封装性、多态性以及子类等等方面的功能应用。VFP有着强大的数据处理功能、友好的图形用户界面以及丰富的可视化设计工具等特点,通过对其有效地进行技巧使用,实现其功能发挥的最优化。

关键词： VFP 编程技巧数据库技巧使用

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构画中美关系的未来——评《中美关系:危险的过去与不确定的现在》

国际关系与国际法学刊

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国际关系与国际法学刊 2023年第1期 371-381页

作者：师嘉林天水师范学院外国语学院

自1972年年初尼克松访华伊始,中美关系历经50载而有了长足的发展。过去的50年,中美关系依次经历了接触期、平稳发展期、蜜月期、困难期,由此使得中美关系的未来走向充满了极大的不确定性。罗伯特·萨特教授(Robert ***)再版的新著《中... 详细信息

自1972年年初尼克松访华伊始,中美关系历经50载而有了长足的发展。过去的50年,中美关系依次经历了接触期、平稳发展期、蜜月期、困难期,由此使得中美关系的未来走向充满了极大的不确定性。罗伯特·萨特教授(Robert ***)再版的新著《中美关系:危险的过去与不确定的现在》通过历史的视角为我们呈现了中美关系过去百余年演变的全息图景,运用翔实的史料和丰富的案例深刻建构了两国关系发展中的关键性事件,层次清晰、观点鲜明、论述深刻,为当下和今后分析与把握中美关系的走向提供了重要参考,引发读者强烈的共鸣与思考。

关键词：中美关系重构竞合不确定的未来

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波多黎各政治身份问题初探

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武陵学刊 2017年第5期42卷 82-89页

作者：师嘉林重庆邮电大学外国语学院重庆400065

波多黎各政治身份问题由来已久。2012年波多黎各进行了第四次全民公投,其海外自治领的身份进一步强化,而寻求加入美国联邦的计划失败。自1898年以来,美国对波多黎各政治、经济的战略考量是其殖民波多黎各的本质。波多黎各政治身份问题... 详细信息

波多黎各政治身份问题由来已久。2012年波多黎各进行了第四次全民公投,其海外自治领的身份进一步强化,而寻求加入美国联邦的计划失败。自1898年以来,美国对波多黎各政治、经济的战略考量是其殖民波多黎各的本质。波多黎各政治身份问题的症结在于:波多黎各经济的疲软拖累了其政治身份问题的解决,附庸型经济关系导致其政治民主化进程放缓;波多黎各本土的身份、文化认同以及民族主义运动,对美国管控波多黎各构成强大冲击;美国国会拥有决定波多黎各政治未来的终极单边权力。

关键词：波多黎各美国政治身份

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