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Seismic response and correlation analysis of a pile-supported wharf to near-fault pulse-like ground motions

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Earthquake Engineering and Engineering Vibration 2024年第4期23卷 883-897页

作者： Wang Jianfeng Su lei Xie Libo Ling xianzhang Ju Peng School of Civil Engineering Qingdao University of TechnologyQingdao 266500China School of Civil Engineering Harbin Institute of TechnologyHarbin 150006China No.2 Engineering Company Ltd.of CCCC First Harbor Engineering Company Ltd Qingdao 266071China

Earthquake investigations have shown that near-fault pulse-like(NF-P)ground motions have unique characteristics compared to near-fault non-pulse-like(NF-NP)and far-field(FF)ground *** is necessary to study the seismic response of pile-supported wharf(PSW)structures under NF-P ground *** this study,a three-dimensional finite element numerical model is created to simulate a *** imparting three types of ground motion,the engineering demand parameters(EDPs)of PSW under NF-P ground motions were analyzed and compared,in which EDPs are the maximum displacement and bending moment of the *** intensity measures(IMs)were selected to characterize the properties of ground *** correlation between IMs and EDPs was *** results show that the piles present larger displacement and bending moment under NF-P ground motions compared to NF-NP and FF ground *** of the IMs have a high correlation with EDPs under NF-P ground motions,and these IMs are more applicable to FF ground *** correlation coefficients between EDPs and IMs under three types of ground motion were obtained,which will provide a valuable reference for the seismic design of PSWs.

关键词： pile-supported wharf correlation analysis near-fault pulse-like ground motion intensity measure seismic response

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碳酸锂钠共晶盐复合相变材料的储放热特性

储能科学与技术 2017年第4期6卷 655-661页

作者：李传李琦姜竹曹慧谯耕李永亮雷宪章丁玉龙英国伯明翰大学储能中心英国伦敦大学学院化学工程学院全球能源互联网欧洲研究院德国柏林10117

对以碳酸锂钠共晶盐为相变材料,氧化镁颗粒为陶瓷基体和石墨为导热增强剂的复合相变材料模块储放热性能进行实验研究,并与纯相变材料进行了对比。结果表明,对于储热过程,添加有导热增强剂的复合材料模块储热性能明显高于纯相变材料,且... 详细信息

对以碳酸锂钠共晶盐为相变材料,氧化镁颗粒为陶瓷基体和石墨为导热增强剂的复合相变材料模块储放热性能进行实验研究,并与纯相变材料进行了对比。结果表明,对于储热过程,添加有导热增强剂的复合材料模块储热性能明显高于纯相变材料,且其储热性能随着导热增强剂含量的增加而提高。当石墨质量含量从5%提高到30%时,材料模块整体的储热时间缩短29%。对于放热过程,实验考察了两种放热条件—自然对流和强制对流。结果表明,强制对流条件下材料模块的放热性能要优于自然对流条件下的放热性能。对比纯相变材料,复合材料模块的整体放热速率提高了近33%。

关键词：碳酸锂钠相变材料复合储能材料储放热特性

Numerical simulations of shake-table experiment for dynamic soil-pile-structure interaction in liquefi able soils

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Earthquake Engineering and Engineering Vibration 2014年第1期13卷 171-180页

作者： Tang Liang Baydaa Hussain Maula Ling xianzhang Su lei Key Lab of Structures Dynamic Behavior and Control(Harbin Institute of Technology) Ministry of Education School of Civil Engineering Harbin Institute of Technology

A shake-table experiment on pile foundations in liquefi able soils composed of liquefi able sand and overlying soft clay is studied. A three-dimensional(3D) effective stress fi nite element(FE) analysis is employed to simulate the experiment. A recently developed multi-surface elasto-plastic constitutive model and a fully coupled dynamic inelastic FE formulation(u-p) are used to model the liquefaction behavior of the sand. The soil domains are discretized using a solid-fl uid fully coupled(u-p) 20-8 noded brick element. The pile is simulated using beam-column elements. Upon careful calibration, very good agreement is obtained between the computed and the measured dynamic behavior of the ground and the pile. A parametric analysis is also conducted on the model to investigate the effect of pile-pinning, pile diameter, pile stiffness, ground inclination angle, superstructure mass and pile head restraints on the ground improvement. It is found that the pile foundation has a noticeable pinning effect that reduces the lateral soil displacement. It is observed that a larger pile diameter and fi xed pile head restraints contribute to decreasing the lateral pile deformation; however, a higher ground inclination angle tends to increase the lateral pile head displacements and pile stiffness, and superstructure mass seems to effectively infl uence the lateral pile displacements.

关键词： liquefaction pile pinning soil improvement pile deformation earthquake nonlinear fi nite element method shake-table experiment

Joint Probabilistic Scheduling and Resource Allocation for Wireless Networked Control Systems

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 258-260页

作者： Meng Zheng lei Zhang Wei Liang IEEE the State Key Laboratory of Robotics and the Key Laboratory of Networked Control Systems Shenyang Institute of Automation Chinese Academy of Sciences the University of Chinese Academy of Sciences

Dear Editor,This letter presents a joint probabilistic scheduling and resource allocation method(PSRA) for 5G-based wireless networked control systems(WNCSs). As a control-aware optimization method, PSRA minimizes the linear quadratic Gaussian(LQG) control cost of WNCSs by optimizing the activation probability of subsystems, the number of uplink repetitions, and the durations of uplink and downlink phases. Simulation results show that PSRA achieves smaller LQG control costs than existing works.

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NETOMAC 在静止调相器仿真中的应用

电网技术 1998年第4期22卷 1-3页

作者：梁旭姜齐荣王仲鸿韩英铎雷宪章 D.Povh D.Retzmann 清华大学电机系德国西门子公司输配电集团

应用德国西门子公司的电力系统仿真软件ＮＥ－ＴＯＭＡＣ，在瞬时值模式和稳态值模式下，利用不同的模型，对ＦＡＣＴＳ技术的核心装置之一——静止调相器进行了仿真研究。结果表明，该软件所具有的某些特点，为装置主电路参数的选择、... 详细信息

应用德国西门子公司的电力系统仿真软件ＮＥ－ＴＯＭＡＣ，在瞬时值模式和稳态值模式下，利用不同的模型，对ＦＡＣＴＳ技术的核心装置之一——静止调相器进行了仿真研究。结果表明，该软件所具有的某些特点，为装置主电路参数的选择、保护系统的设计、控制策略的确定以及装置与电力系统之间的相互作用等几个方面的仿真研究提供了很大的方便，非常适合对电力电子装置的开发及其在系统中运行方式的研究进行仿真。

关键词：柔性输电系统调相器 NETOMAC 仿真电力系统

Response of a pile group behind quay wall to liquefaction-induced lateral spreading:a shake-table investigation

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Earthquake Engineering and Engineering Vibration 2014年第4期13卷 741-749页

作者： Tang Liang Zhang Xiaoyu Ling xianzhang Su lei Liu Chunhui School of Civil Engineering Harbin Institute of Technology Key lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology

The response of pile foundations near a quay wall under liquefaction-induced lateral spreading remains a complex problem. This study presents the results of a shake-table test on a 2×2 pile group behind a sheet-pile quay wall that was subjected to lateral spreading. The quay wall was employed to trigger liquefaction-induced large lateral ground deformation. The discussions focus on the behavior of the pile and the soil and on the bending moment distributions within the group pile and the restoring force characteristics at the superstructure. Overall, the piles exhibited apparent pinning effects that reduced soil deformation. In addition, the rear-row piles near the quay wall experienced larger bending moments than did the front-row piles, indicating significant pile group effects. The tests showed that lateral spreading could be a primary cause of larger monotonic deformations and bending moments. It can also be concluded that the monotonic bending moments were significantly decreased due to the presence of slow soil flow. The stiffness at the superstructure was reduced because of accumulated excess pore pressure before liquefaction, and it was recovered during lateral spreading. The present study further enhances current understanding of the behavior of low-cap pile foundations under lateral spreading.

关键词： lateral spreading liquefaction pile group behavior shake-table experiment

Fluorinated poly(p-triphenylene isatin) anion exchange membranes based on hydrophilic hydroxyl side chain modulation for fuel cells

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Journal of Energy Chemistry 2025年第1期100卷 702-709页

作者： Yiman Gu Yanchao Zhang Zhanyu Li Yijia lei Baozeng Sun Xiaoyu Yu Zhe Wang College of Chemistry and Life Science Changchun University of Technology College of Chemical Engineering Changchun University of Technology School of Materials Science and Engineering Changchun University of Technology Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province

The development of alkaline fuel cells is moving forward at an accelerated pace,and the application of ether-free bonded polymers to anion exchange membranes （AEMs） has been widely ***,the question of the“trade-off”between AEM ionic conductivity and dimensional stability remains *** strategy of inducing microphase separation to improve the performance of AEM has attracted much attention recently,but the design of optimal molecular structures is still being ***,this work introduced different ratios of 3-bromo-1,1,1-trifluoroacetone （x=40,50,and 60） into the main chain of poly（p-terphenylene isatin）.Because fluorinated groups have excellent hydrophobicity,hydrophilic hydroxyl-containing side chains are introduced to jointly adjust the formation of phase separation *** results show that PTI-PTF50-NOH AEM with the appropriate fluorinated group ratio has the best ionic conductivity and alkali stability under the combined effect of *** has an ionic conductivity of 133.83 mS cm-1at 80°*** addition,the OH-conductivity remains at 89%of the initial value at 80°C and 3 M KOH for 1056 h of *** cell polarization curve based on PTI-PTF50-NOH shows a power density of 734.76 mW cm-2at a current density of 1807.7 mA cm-2.

关键词： Anion exchange membranes Poly(p-terphenylene isatin) Hydrophilic-hydrophobic phase separation Fluorinated group

Statistical characteristics and classification of ionospheric mid-latitude trough as revealed by the observations of DMSP-F18

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Earth and Planetary Physics 2025年第1期9卷 137-147页

作者： Yi Liu JiuHou lei FuQing Huang Su Zhou School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China School of Science Guiyang UniversityGuiyang 550005China

Statistical characteristics and the classification of the topside ionospheric mid-latitude trough are systemically analyzed,using observations from the Defense Meteorological Satellite Program F18(DMSP-F18)*** data was obtained at an altitude of around 860 km in near polar orbit,throughout *** study identified the auroral boundary based on the in-situ electron density and electron spectrum,allowing us to precisely determine the location of the mid-latitude *** differs from most previous works,which only use Total Electron Content(TEC)or in-situ electron *** our study,the troughs exhibited a higher occurrence rate in local winter than in summer,and extended to lower latitudes with increasing geomagnetic *** was found that the ionospheric mid-latitude trough,which is associated with temperature changes or enhanced ion drift,exhibited distinct ***,the ionospheric mid-latitude troughs related to electron temperature(Te)peak were located more equatorward of auroral oval boundary in winter than in *** ionospheric mid-latitude troughs related to Te-maximum were less frequently observed at 60−70°S magnetic latitude and 90−240°E ***,the troughs related to ion temperature(Ti)maximums were observed at relatively higher latitudes,occurring more frequently in *** addition,the troughs related to ion velocity(Vi)maximums could be observed in all *** troughs with the maximum-Ti and maximum-Vi were located closer to the equatorward boundary of the auroral oval at the nightside,and in both *** implies that enhanced ion drift velocity contributes to increased collisional frictional heating and enhanced ion temperatures,resulting in a density depletion within the trough region.

关键词： topside ionosphere mid-latitude trough ionospheric main trough auroral oval boundary temperature maximum

Dative B–N bonds weaven toward two-dimensional purely organic materials for single crystals

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Science China Chemistry 2025年第01期 12-14页

作者： Wei-lei Zhou Siwei Wang Yong Chen College of Chemistry and Materials Science Inner Mongolia Key Laboratory of Chemistry for Nature Products and Synthesis for Functional Molecules Innovation Team of Optical Functional Molecular Devices Inner Mongolia Minzu University College of Chemistry Nankai University

Molecular topology is one of the important topics to study and understand the relationship between molecular structure and properties [1]. Particularly, two-dimensional (2D) materials with extremely high surface area and ultra-thin morphology have attracted considerable attention due to their unexpected properties in materials and chemistry [2,3].

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