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Reconstructing proton channels via Zr-MOFs realizes highly ion-selective and proton-conductive SPEEK-based hybrid membrane for vanadium flow battery

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Journal of Energy Chemistry 2022年第12期75卷 448-456,I0012页

作者： denghua zhang Wenjie Yu Yue zhang Sihan Cheng Mingyu Zhu Shuai Zeng Xihao zhang Yifan zhang Chao Luan Zishen Yu Lansong Liu Kaiyue zhang Jianguo Liu Chuanwei Yan Institute of Metal Research Chinese Academy of SciencesShenyang 110016LiaoningChina School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016LiaoningChina

There is an urgent need to break through the trade-off between proton conductivity and ion selectivity of proton exchange membrane(PEM)in vanadium flow battery(VFB).Proton channels in PEM are the key to controlling the ion sieving and proton conductivity in ***,two types of proton channels are reconstructed in the hybrid membrane via introducing modified Zr-MOFs(IM-UIO-66-AS)into SPEEK *** proton channels in IM-UIO-66-AS and interfacial proton channels between grafted imidazole groups on Zr-MOFs and SPEEK greatly improve the conductivity of the IM-UIO-66-AS/SPEEK hybrid *** importantly,both reconstructed proton channels block the vanadium-ion permeation to realize enhanced ion selectivity according to the size sieving and Donnan exclusion effects,***,the hybrid membrane exhibits good mechanical property and dimensional *** from such rational design,a VFB loading with the optimized membrane exhibits enhanced voltage efficiency of 79.9%and outstanding energy efficiency of 79.6%at 200 m A cm^(-2),and keeps a notable cycle stability for 300 cycles in the long-term cycling ***,this study provides inspiration for preparing next-generation PEMs with high ion selectivity and proton conductivity for VFB application.

关键词： Vanadium flow battery Hybrid membrane Metal organic framework Proton channel Ion selectivity

耦合改进PERT和BBNs的堆石坝施工进度风险分析

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水利学报 2017年第1期48卷 52-60页

作者：钟登华闫玉亮张隽王飞天津大学水利工程仿真与安全国家重点试验室天津300072

传统的计划评审技术(PERT)考虑的三时估计值主观性偏强,没有考虑风险因素相关性对工序活动工期的影响,影响了工期仿真与风险评价的客观性以及分析结果的可靠性。本文建立了耦合改进PERT和贝叶斯信念网络(BBNs)的心墙堆石坝施工进度风险... 详细信息

传统的计划评审技术(PERT)考虑的三时估计值主观性偏强,没有考虑风险因素相关性对工序活动工期的影响,影响了工期仿真与风险评价的客观性以及分析结果的可靠性。本文建立了耦合改进PERT和贝叶斯信念网络(BBNs)的心墙堆石坝施工进度风险分析模型,首先利用BBNs推理功能推算工序活动风险因素相关性,同时分析工程进度风险;其次将三角模糊数和模糊测度Me方法相结合来对PERT进行改进,引入了决策者风险偏好指标;最后将该模型应用到实际工程,得到决策者风险偏好指数-工期-完工概率分布曲线,可用于指导施工决策。工程应用结果表明:与传统的PERT方法相比,耦合改进PERT和BBNs得到的仿真结果更加可靠,可为心墙堆石坝施工进度方案设计提供理论依据。

关键词：心墙堆石坝施工进度风险风险分析模型工期仿真风险偏好指数-工期-完工概率分布曲线

Theory and practice of construction simulation for high rockfill dam

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Science China Technological Sciences 2007年第S1期 51-61页

作者： ZHONG denghua?, zhang Ping & WU KangXin Department of Hydraulic and Hydroelectric Engineering, School of Civil Engineering, Tianjin University, Tianjin 300072, China

关键词： high rockfill dam construction simulation cycle operation network visualization

Advancements in intelligent dam engineering construction in the intelligence era

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Shuili Xuebao/Journal of Hydraulic Engineering 2025年第1期56卷 1-19页

作者： Zhong, denghua zhang, Tianhong Yu, Hongling Wang, Jiajun zhang, Jun Yu, Jia College of Water Resources and Civil Engineering China Agricultural University Beijing100091 China State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation Tianjin University Tianjin300072 China

In the context of the era of intelligence，the theories and technologies underpinning intelligent dam engineering construction constitute a crucial new driver of productivity in hydraulic engineering，playing a key strategic role in advancing the transformation and upgrading of dam construction in terms of intelligence，efficiency，and safety. Drawing on bibliometric analysis，this paper investigates current research hotspots and emerging trends in the intelligentization of hydraulic engineering. It clarifies the fundamental concepts，features，developmental stages，and cutting-edge findings of intelligent dam construction，and systematically reviews the evolutionary trajectory of digital-intelligent design，intelligent construction，and smart operation and maintenance. Finally，the paper discusses the future directions and core research foci of intelligent dam construction，aiming to provide theoretical and practical guidance for promoting the intelligent development of dam engineering in China. © 2025 International Research and Training Center on Erosion and Sedimentation and China Water and Power Press. All rights reserved.

关键词： digital-intelligent design intelligent construction intelligent dam construction intelligent era maintenance smart operation

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基于LHS的坝基岩体三维裂隙网络模拟

水力发电学报 2016年第10期35卷 93-102页

作者：岳攀钟登华吴含张亦弛天津大学水利工程仿真与安全国家重点实验室天津300072

坝基岩体裂隙发育直接影响水电工程的结构安全与渗流稳定,建立准确的坝基岩体三维裂隙网络模型是分析坝体安全的基础。岩体裂隙数量巨大,分布复杂,以往的研究多采用Monte Carlo简单随机抽样方法获取裂隙参数的样本数据,进而建立二维或... 详细信息

坝基岩体裂隙发育直接影响水电工程的结构安全与渗流稳定,建立准确的坝基岩体三维裂隙网络模型是分析坝体安全的基础。岩体裂隙数量巨大,分布复杂,以往的研究多采用Monte Carlo简单随机抽样方法获取裂隙参数的样本数据,进而建立二维或三维裂隙网络模型,忽略了揭露面以下裂隙数据对模拟结果的影响,计算结果稳定性差、精度低,且容易产生样本坍塌的问题。本文提出了水电工程坝基岩体三维裂隙网络的模拟方法,即在坝基揭露面裂隙数据的基础上,融合钻孔摄像技术获取的钻孔全孔壁资料,对裂隙面位置、大小、数量和产状等参数进行统计;然后采用拉丁超立方抽样(Latin Hypercube Sampling)方法对裂隙参数进行随机模拟;最终利用Visual Geo软件建立三维裂隙网络模型。该方法应用于某水电站坝基裂隙三维网络模拟中,并与传统的Monte Carlo方法进行对比,结果表明:该方法在融合揭露面裂隙资料和钻孔摄像数据的前提下,空间填充性好,模拟结果更加接近实测值,为水电工程坝基稳定分析提供了可靠的技术手段和准确的模型基础。

关键词：水电工程坝基岩体三维裂隙网络模拟拉丁超立方抽样蒙特卡洛钻孔摄像