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Effect of bipolar-plates design on corrosion,mass and heat transfer in proton-exchange membrane fuel cells and water electrolyzers:A review

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1599-1616页

作者： Jiuhong Zhang Xiejing Luo Yingyu Ding Luqi Chang chaofang Dong Key Laboratory for Corrosion and Protection(MOE) Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing 100083China

Attaining a decarbonized and sustainable energy system,which is the core solution to global energy issues,is accessible through the development of hydrogen ***-exchange membrane water electrolyzers(PEMWEs)are promising devices for hydrogen production,given their high efficiency,rapid responsiveness,and *** plates account for a relatively high percentage of the total cost and weight compared with other components of ***,optimization of their design may accelerate the promotion of *** paper reviews the advances in materials and flow-field design for bipolar ***,the working conditions of proton-exchange membrane fuel cells(PEMFCs)and PEMWEs are compared,including reaction direction,operating temperature,pressure,input/output,and ***,the current research status of bipolar-plate substrates and surface coatings is summarized,and some typical channel-rib flow fields and porous flow fields are ***,the effects of materials on mass and heat transfer and the possibility of reducing corrosion by improving the flow field structure are ***,this review discusses the potential directions of the development of bipolar-plate design,including material fabrication,flow-field geometry optimization using threedimensional printing,and surface-coating composition optimization based on computational materials science.

关键词： bipolar-plates flow design mass and heat transfer corrosion water electrolyzers fuel cells

基于拍卖鸽群优化算法的多无人机追踪分布式任务分配

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天津大学学报（自然科学与工程技术版） 2024年第4期57卷 403-414页

作者：胡超芳宋思涵徐嘉均王迪迪天津大学电气自动化与信息工程学院天津300072

无人机技术已经广泛应用于各种研究领域,任务分配是多无人机协同的关键技术之一,对多无人机任务完成质量的影响极大,针对多个目标追踪场景下的多无人机任务分配问题,提出了一种基于拍卖鸽群优化(auction-PIO)算法的分布式分配方法.首先... 详细信息

无人机技术已经广泛应用于各种研究领域,任务分配是多无人机协同的关键技术之一,对多无人机任务完成质量的影响极大,针对多个目标追踪场景下的多无人机任务分配问题,提出了一种基于拍卖鸽群优化(auction-PIO)算法的分布式分配方法.首先采用追踪总距离、分配均衡性、任务完成时间3个性能指标,结合追踪任务约束条件,建立了分布式多指标0/1整数规划模型.然后以拍卖策略作为分布式优化框架,无人机作为拍卖者对地面目标进行竞拍出价,通过多轮竞拍确定任务分配方案.为提高拍卖分配的最优性,增强了各无人机间的共享信息量,进而使无人机可对所有目标进行竞拍出价,并引入PIO算法更新各无人机的竞拍价格,将鸽子位置编码为无人机对各地面目标的竞拍增价,利用地图指南针算子和地标算子迭代更新种群位置,实现对无人机竞拍价格的优化更新.在此基础上,设计基于目标优先级的解算策略,用于将竞价矩阵和距离矩阵解算为任务分配方案,并进行了算法的计算复杂度分析.最后对所提拍卖鸽群优化算法分别进行了数值仿真、Gazebo虚拟仿真和实机户外飞行实验,结果表明:所提算法拥有良好的任务分配性能,不但在数值仿真对比中,优化性能比经典拍卖算法提高了12.16%,而且虚拟仿真和户外实验也说明算法能够满足实用性要求.

关键词：无人机目标追踪任务分配拍卖鸽群优化

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水泥搅拌桩在水库大坝除险加固中的应用

陕西水利 2024年第4期 22-24,35页

作者：段朝芳新疆水利水电勘测设计研究院有限责任公司新疆乌鲁木齐830000

水泥土搅拌桩防渗墙作为一种常用的垂直防渗技术,广泛应用于水库大坝除险加固中。采用有限元模拟分析防渗墙布设位置和入土深度对防渗效果的影响。结果表明:防渗墙的设置能够提高大坝的防渗能力;渗流量随着防渗墙向下游移动逐渐提高,随... 详细信息

水泥土搅拌桩防渗墙作为一种常用的垂直防渗技术,广泛应用于水库大坝除险加固中。采用有限元模拟分析防渗墙布设位置和入土深度对防渗效果的影响。结果表明:防渗墙的设置能够提高大坝的防渗能力;渗流量随着防渗墙向下游移动逐渐提高,随着墙体入土深度的增加逐渐降低;为了便于施工,在坝体中部接近上游位置处布设防渗墙比较合理,不会对防渗效果造成较大影响。研究结果为大坝防渗加固提供参考。

关键词：水泥土搅拌桩防渗墙防渗技术有限元模拟渗透系数大坝

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梳状高度计编队探测海洋涡旋仿真分析

中国海洋大学学报（自然科学版） 2024年第1期54卷 128-137页

作者：王绚马纯永梁达赵朝方陈戈中国海洋大学信息科学与工程学部山东青岛266100 青岛海洋科学与技术试点国家实验室区域海洋动力学与数值模拟功能实验室山东青岛266237

单颗星下点高度计卫星可进行一维海面高度测量,但时空分辨率较低,对涡旋的探测能力不足。梳状高度计卫星编队可提升海面高度时空分辨率,增强对涡旋的识别探测能力。为定量分析高度计编队下的涡旋探测能力,本文在黑潮延伸体海域开展观测... 详细信息

单颗星下点高度计卫星可进行一维海面高度测量,但时空分辨率较低,对涡旋的探测能力不足。梳状高度计卫星编队可提升海面高度时空分辨率,增强对涡旋的识别探测能力。为定量分析高度计编队下的涡旋探测能力,本文在黑潮延伸体海域开展观测仿真实验,对海平面高度进行沿轨采样,经优化插值算法处理后得到逐天海面高度异常数据场并进行涡旋识别与统计分析。此外,本文还同步开展了单颗星下点高度计和成像高度计卫星涡旋探测仿真实验及对比分析。结果表明,梳状高度计卫星编队在涡旋数量、极性、半径及振幅等方面识别效果较好,与成像高度计探测结果相近。

关键词：星下点高度计梳状高度计编队海平面高度异常涡旋探测

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大气腐蚀监测Cu-Zn探针环境因素敏感性和腐蚀影响

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中国腐蚀与防护学报 2024年第5期44卷 1339-1344页

作者：张昊陈俊航胡为峰张新董超芳肖葵北京科技大学新材料技术研究院北京100083 北京赛亿科技有限公司北京100083 北京科大分析检验中心有限公司北京100083

探讨了Cu-Zn探头在不同温度、NaCl浓度、NaHSO_(3)浓度以及NaCl和NaHSO_(3)混合溶液的盐雾环境下的腐蚀行为,以及Cu-Zn探头积分电量的变化规律。研究结果表明,Cu-Zn探头对温度、NaCl浓度、NaHSO_(3)浓度以及二者混合体系浓度的变化具有... 详细信息

探讨了Cu-Zn探头在不同温度、NaCl浓度、NaHSO_(3)浓度以及NaCl和NaHSO_(3)混合溶液的盐雾环境下的腐蚀行为,以及Cu-Zn探头积分电量的变化规律。研究结果表明,Cu-Zn探头对温度、NaCl浓度、NaHSO_(3)浓度以及二者混合体系浓度的变化具有高度敏感性,表现出较为显著的灵敏度。在综合考虑各因素的基础上,CuZn探头的腐蚀影响顺序为:温度3浓度3混合浓度。

关键词： ACM技术 Cu-Zn探头盐雾试验积分电量

Multi-objective reentry trajectory optimization method via GVD for hypersonic vehicles

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Journal of Systems Engineering and Electronics 2017年第4期28卷 732-744页

作者： chaofang Hu Yue Xin Hao Feng School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

In the constrained reentry trajectory design of hypersonic vehicles, multiple objectives with priorities bring about more difficulties to find the optimal solution. Therefore, a multi-objective reentry trajectory optimization (MORTO) approach via generalized varying domain (GVD) is proposed. Using the direct collocation approach, the trajectory optimization problem involving multiple objectives is discretized into a nonlinear multi-objective programming with priorities. In terms of fuzzy sets, the objectives are fuzzified into three types of fuzzy goals, and their constant tolerances are substituted by the varying domains. According to the principle that the objective with higher priority has higher satisfactory degree, the priority requirement is modeled as the order constraints of the varying domains. The corresponding two-side, single-side, and hybrid-side varying domain models are formulated for three fuzzy relations respectively. By regulating the parameter, the optimal reentry trajectory satisfying priorities can be achieved. Moreover, the performance about the parameter is analyzed, and the algorithm to find its specific value for maximum priority difference is proposed. The simulations demonstrate the effectiveness of the proposed method for hypersonic vehicles, and the comparisons with the traditional methods and sensitivity analysis are presented.

关键词： hypersonic vehicle reentry trajectory design multi-objective optimization generalized varying domain direct collocation method

Design materials based on simulation results of silicon induced segregation at AlSi10Mg interface fabricated by selective laser melting

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Journal of Materials Science & Technology 2020年第11期42卷 145-155页

作者： Yuchengji chaofang Dong Decheng Kong Xiaogang Li Beijing Advanced Innovation Center for Materials Genome Engineering Key Laboratory for Corrosion and Protection(MOE)Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China

AlSi10Mg fabricated by selective laser melting(SLM)had a unique network-like silicon-rich structure,and the mechanism for its formation was explained by molecular dynamics(MD)*** effects of the silicon-rich phase and Mg-containing structure on corrosion were studied by first-principles *** to the simulations,corrosion resistant materials were designed,samples with laser powers of 150 W,2.0 W and 2.0 W were *** results indicated that a local thermal gradient during laser printing caused Si segregation,and the rapid cooling rate lead to a large number of subgrains,which assisted *** difference in potential caused galvanic corrosion,and a structure with low work function in the molten pool caused *** corrosion resistance of materials processed with a high laser power increased.

关键词： AlSi10Mg Selective laser melting Atomistic simulation Material design Segregation Corrosion

基于网络药理学探讨茯苓-泽泻药对治疗慢性肾炎的作用机制

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中国中医药图书情报杂志 2024年第1期48卷 63-68页

作者：谭钞芳高常柏天津中医药大学天津300000 天津中医药大学第二附属医院天津300150

目的基于网络药理学方法探讨茯苓-泽泻药对治疗慢性肾炎的物质基础及作用机制。方法通过TCMSP获取茯苓-泽泻药对的活性成分,并在PharmMapper平台预测活性成分的作用靶点;运用Cytoscape3.8.2.件构建“活性成分-靶点”网络;检索GeneCa... 详细信息

目的基于网络药理学方法探讨茯苓-泽泻药对治疗慢性肾炎的物质基础及作用机制。方法通过TCMSP获取茯苓-泽泻药对的活性成分,并在PharmMapper平台预测活性成分的作用靶点;运用Cytoscape3.8.2.件构建“活性成分-靶点”网络;检索GeneCards、OMIM数据库获取慢性肾炎相关靶点;采用Venny2.1在线作图工具平台构建韦恩图,得到药物与疾病交集靶点;采用STRING数据库构建交集靶点蛋白质-蛋白质相互作用网络,利用Cytoscape3.8.2.件及CytoNCA插件筛选关键靶点;借助DAVID数据库对关键靶点进行GO功能和KEGG通路富集分析。结果获得茯苓-泽泻药对活性成分2.个,作用靶点89个,慢性肾炎相关靶点1 2.0个,交集靶点31个,关键靶点15个。主要活性成有茯苓新酸A、泽泻醇C、茯苓新酸B、去氢茯苓酸等,关键靶点包括ALB、EGFR、SRC、CASP3等。关键靶点GO功能富集分析得到106个相关条目,生物过程主要富集于脂质和动脉粥样硬化、内分泌抵抗、肺癌蛋白多糖等;KEGG通路富集得到81条信号通路,主要涉及血管内皮生长因子(VEGF)信号通路、肿瘤坏死因子(TNF)信号通路、白细胞介素-17(IL-17)信号通路等。结论茯苓-泽泻药对可能通过ALB、EGFR、SRC等靶点,调控VEGF信号通路、TNF信号通路、IL-17信号通路等,发挥抗炎、抗氧化、调节细胞凋亡、抑制肾小球系膜细胞增生、延缓肾纤维化进展等药理作用治疗慢性肾炎。

关键词：茯苓泽泻慢性肾炎网络药理学

Pitting and galvanic corrosion behavior of stainless steel with weld in wet-dry environment containing Cl^-

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Journal of University of Science and Technology Beijing 2007年第6期14卷 517-522页

作者： Cui Lin Xiaogang Li chaofang Dong School of Material Science and Technology Nanchang Hangkong University Nanchang 330063 China Corrosion and Protection Center University of Science and Technology Beijing Beijing 100083 China State Key Laboratory for Corrosion and Protection Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Accelerated corrosion test of stainless steel with weld was carried out to investigate the corrosion behavior under the wetdry cyclic condition in the atmosphere containing Cl^-. In the surface morphology, corrosion products were analyzed by metallographic observation, scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The results show that the damage to stainless steel with weld in the atmosphere containing Cl^- is due to localized corrosion, especially pitting and galvanic corrosion, Weld acts as the anode, whereas matrix acts as the cathode in the corrosion process. The pitting corrosion, including the nucleation and growth of a stable pit, is promoted by the presence of wet-dry cycles, especially during the drying stage. Pits centralizing in weld are found to be grouped together like colonies, with a number of smaller pits surrounding a larger pit. The composition of the corrosion products is Fe2.3, Cr2.3, Fe3O4, NiCrO4, etc.

关键词： stainless steel weld wet-dry environment chlorion