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Advanced 3D ordered electrodes for PEMFC applications: From structural features and fabrication methods to the controllable design of catalyst layers

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Green Energy & Environment 2024年第09期9卷 1336-1365页

作者： Kaili Wang tingting zhou Zhen Cao Zhimin Yuan Hongyan He Maohong Fan Zaiyong Jiang School of Chemistry & Chemical Engineering and Environmental Engineering Weifang University Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Multiphase Complex Systems CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences College Engineering and Physical Sciences and School of Energy Resources University of Wyoming

The catalyst layers(CLs) electrode is the key component of the membrane electrode assembly(MEA) in proton exchange membrane fuel cells(PEMFCs). Conventional electrodes for PEMFCs are composed of carbon-supported, ionomer, and Pt nanoparticles, all immersed together and sprayed with a micron-level thickness of CLs. They have a performance trade-off where increasing the Pt loading leads to higher performance of abundant triple-phase boundary areas but increases the electrode cost. Major challenges must be overcome before realizing its wide commercialization. Literature research revealed that it is impossible to achieve performance and durability targets with only high-performance catalysts, so the controllable design of CLs architecture in MEAs for PEMFCs must now be the top priority to meet industry goals. From this perspective, a 3D ordered electrode circumvents this issue with a support-free architecture and ultrathin thickness while reducing noble metal Pt loadings. Herein, we discuss the motivation in-depth and summarize the necessary CLs structural features for designing ultralow Pt loading electrodes. Critical issues that remain in progress for 3D ordered CLs must be studied and characterized. Furthermore, approaches for 3D ordered CLs architecture electrode development, involving material design, structure optimization, preparation technology, and characterization techniques, are summarized and are expected to be next-generation CLs for PEMFCs. Finally, the review concludes with perspectives on possible research directions of CL architecture to address the significant challenges in the future.

关键词： PEMFC 3D ordered electrode Structural features Preparation technology Ultralow Pt loading

Overcoming the Limits of Cross-Sensitivity:Pattern Recognition Methods for Chemiresistive Gas Sensor Array

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Nano-Micro Letters 2024年第12期16卷 285-341页

作者： Haixia Mei Jingyi Peng Tao Wang tingting zhou Hongran Zhao Tong Zhang Zhi Yang Key Lab Intelligent Rehabil&Barrier Free Disable(Ministry of Education) Changchun UniversityChangchun 130022People’s Republic of China Shanghai Key Laboratory of Intelligent Sensing and Detection Technology School of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237People’s Republic of China National Key Laboratory of Advanced Micro and Nano Manufacture Technology Department of Micro/Nano ElectronicsSchool of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012People’s Republic of China

As information acquisition terminals for artificial olfaction,chemiresistive gas sensors are often troubled by their cross-sensitivity,and reducing their cross-response to ambient gases has always been a difficult and important point in the gas sensing *** recognition based on sensor array is the most conspicuous way to overcome the cross-sensitivity of gas *** is crucial to choose an appropriate pattern recognition method for enhancing data analysis,reducing errors and improving system reliability,obtaining better classification or gas concentration prediction *** this review,we analyze the sensing mechanism of crosssensitivity for chemiresistive gas *** further examine the types,working principles,characteristics,and applicable gas detection range of pattern recognition algorithms utilized in gas-sensing ***,we report,summarize,and evaluate the outstanding and novel advancements in pattern recognition methods for gas *** the same time,this work showcases the recent advancements in utilizing these methods for gas identification,particularly within three crucial domains:ensuring food safety,monitoring the environment,and aiding in medical *** conclusion,this study anticipates future research prospects by considering the existing landscape and *** is hoped that this work will make a positive contribution towards mitigating cross-sensitivity in gas-sensitive devices and offer valuable insights for algorithm selection in gas recognition applications.

关键词： Pattern recognition Sensor array Chemiresistive gas sensor Cross-sensitivity Artificial olfactory

Synergistic effects of the entomopathogenic fungus Isaria javanica and low doses of dinotefuran on the efficient control of the rice pest Sogatella furcifera

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Journal of Integrative Agriculture 2024年第2期23卷 621-638页

作者： tingting zhou Qian Zhao Chengzhou Li Lu Ye Yanfang Li Nemat OKeyhani Zhen Huang Department of Entomology College of Plant ProtectionSouth China Agricultural UniversityGuangzhou 510642China Guangdong Provincial Key Laboratory of High Technology for Plant Protection Plant Protection Research InstituteGuangdong Academy of Agricultural SciencesGuangzhou 510642China Department of Microbiology and Cell Science Institute of Food and Agricultural SciencesUniversity of FloridaFL 32611USA

The rice planthopper,Sogatella furcifera,is a piercing-sucking insect pest of rice,Oryza *** is responsible for significant crop yield losses,and has developed moderate to high resistance to several commonly used chemical *** investigated the effects of the insect fungal pathogen Isaria javanica,alone and in combination with the chemical insecticide dinotefuran,on *** under both laboratory and field *** results show that *** displays high infection efficiency and mortality for different stages of ***,reducing adult survival,female oviposition and ovary *** bioassays showed that the combined use of *** with a low dose(4-16 mg L^(-1))of dinotefuran resulted in higher mortality in *** than the use of *** or dinotefuran *** combined treatment also had more significant effects on several host enzymes,including superoxide dismutase,catalase,peroxidase,and prophenol oxidase *** field trials,*** effectively suppressed populations of rice planthoppers to low levels(22-64%of the level in untreated plots).Additional field experiments showed synergistic effects,i.e.,enhanced efficiency,for the control of *** populations using the combination of a low dose of ***(1×10^(4) conidia mL^(-1))and a low dose of dinotefuran(~4.8-19.2%of normal field use levels),with control effects of>90%and a population level under 50 insects per 100 hills at 3-14 days *** findings indicate that the entomogenous fungus *** offers an attractive biological control addition as part of the integrated pest management(IPM)practices for the control of rice plant pests.

关键词： Isaria javanica Sogatella furcifera entomopathogenic fungus white planthopper rice synergistic effect on pest control

Overcoming the Limits of Cross-Sensitivity: Pattern Recognition Methods for Chemiresistive Gas Sensor Array

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Nano-Micro Letters 2024年第12期 293-349页

作者： Haixia Mei Jingyi Peng Tao Wang tingting zhou Hongran Zhao Tong Zhang Zhi Yang Key Lab Intelligent Rehabil & Barrier Free Disable(Ministry of Education) Changchun University Shanghai Key Laboratory of Intelligent Sensing and Detection Technology School of Mechanical and Power Engineering East China University of Science and Technology State Key Laboratory of Integrated Optoelectronics College of Electronic Science and Engineering Jilin University National Key Laboratory of Advanced Micro and Nano Manufacture Technology Department of Micro/Nano Electronics School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University

As information acquisition terminals for artificial olfaction, chemiresistive gas sensors are often troubled by their cross-sensitivity, and reducing their cross-response to ambient gases has always been a difficult and important point in the gas sensing area. Pattern recognition based on sensor array is the most conspicuous way to overcome the cross-sensitivity of gas sensors. It is crucial to choose an appropriate pattern recognition method for enhancing data analysis, reducing errors and improving system reliability, obtaining better classification or gas concentration prediction results. In this review, we analyze the sensing mechanism of crosssensitivity for chemiresistive gas sensors. We further examine the types, working principles, characteristics, and applicable gas detection range of pattern recognition algorithms utilized in gas-sensing arrays. Additionally, we report, summarize, and evaluate the outstanding and novel advancements in pattern recognition methods for gas identification. At the same time, this work showcases the recent advancements in utilizing these methods for gas identification, particularly within three crucial domains: ensuring food safety, monitoring the environment, and aiding in medical diagnosis. In conclusion, this study anticipates future research prospects by considering the existing landscape and challenges. It is hoped that this work will make a positive contribution towards mitigating cross-sensitivity in gas-sensitive devices and offer valuable insights for algorithm selection in gas recognition applications.

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供应链部分整合对再制造产品渠道策略的影响分析

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管理工程学报 2024年第4期38卷 209-221页

作者：易余胤周婷婷暨南大学管理学院广东广州510632

再制造的研究主要聚焦于集中和分散的供应链,但在现实商业实践中部分整合的供应链十分常见。本文分别在无供应链整合、供应链部分前向整合(PFI)和供应链部分后向整合(PBI)三种情况下探讨了再制造产品的销售渠道策略选择问题。研究发现,... 详细信息

再制造的研究主要聚焦于集中和分散的供应链,但在现实商业实践中部分整合的供应链十分常见。本文分别在无供应链整合、供应链部分前向整合(PFI)和供应链部分后向整合(PBI)三种情况下探讨了再制造产品的销售渠道策略选择问题。研究发现,在无供应链整合和PFI下,直销再制造产品对于制造商而言总是占优策略,但不利于零售商,因而造成制造商赢零售商输(win-lose)的局面。在PBI下,直销再制造产品并不一定是制造商的占优策略,此时根据零售商持有股份的大小可能会出现制造商赢零售商输、双赢、制造商输零售商赢三种结果。当制造商直销再制造产品时,相较于无整合情形,在一定条件下PFI可以形成制造商赢零售商赢(win-win)的双赢局面,而PBI总是造成制造商输零售商赢(lose-win)的局面。从对环境的影响来看,由制造商直销再制造产品比零售商销售更环保,而此时不进行供应链部分整合是最环保的。

关键词：再制造供应链部分整合直销渠道分销渠道

基于边缘效应理论的居住区边缘空间优化设计——以重庆广益街居住区为例

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西部人居环境学刊 2024年第1期39卷 129-135页

作者：王冬周婷婷昆明理工大学建筑与城市规划学院

居住区边缘空间是居住区与城市之间信息传递与物质交换的载体,承担着居住区与城市异质空间之间资源交换的功能。然而就目前而言,居住区边缘空间普遍存在着与城市分离、封闭性过强、空间利用率低、功能形式单一、缺乏人性关怀等系列问题... 详细信息

居住区边缘空间是居住区与城市之间信息传递与物质交换的载体,承担着居住区与城市异质空间之间资源交换的功能。然而就目前而言,居住区边缘空间普遍存在着与城市分离、封闭性过强、空间利用率低、功能形式单一、缺乏人性关怀等系列问题。该文针对现存问题,以重庆广益街居住区为例,引入生态学中的边缘效应理论,建立“柔化—融合—共生”的策略框架,以期柔化居住区与城市之间的硬性分隔,提升城市整体空间形象,激活城市空间活力,为类似的居住区边缘空间规划与设计提供参考与借鉴。

关键词：居住区边缘空间边缘效应柔化融合共生

SD法下的大学城邻校商业街边界空间积极塑造——以昆明市呈贡区新天地商业街为例

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南方建筑 2024年第2期 31-41页

作者：周婷婷王冬昆明理工大学建筑与城市规划学院

邻校商业街边界空间作为联系商业街与大学城校园外部空间的特殊地带,是与相邻学校之间信息传递与物质交换的载体,承担着与学校外部空间资源交换的功能,因此,其空间的处理显得格外重要。当前,大学城内的邻校商业街边界空间普遍存在着交... 详细信息

邻校商业街边界空间作为联系商业街与大学城校园外部空间的特殊地带,是与相邻学校之间信息传递与物质交换的载体,承担着与学校外部空间资源交换的功能,因此,其空间的处理显得格外重要。当前,大学城内的邻校商业街边界空间普遍存在着交通混乱、空间利用率低、缺乏公共休憩设施、功能形式单一、与校园分离等系列问题。针对现存问题,以昆明呈贡大学城新天地商业街为例,通过SD法对其边界空间进行分析并建立四个优化策略,以促进商业街与相邻学校之间的融合、提升大学城整体空间形象、激活大学城空间活力,为今后类似的商业街边界空间的规划与设计提供参考。

关键词：大学城商业街边界空间空间塑造 SD法

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基于鞅方法的鸡群优化算法收敛性分析

河南师范大学学报（自然科学版） 2024年第6期52卷 80-87页

作者：周婷婷戴家佳贵州大学数学与统计学院贵阳550025

针对鸡群优化(chicken swarm optimization, CSO)算法已有的收敛性分析结果属于弱收敛,不能保证算法能在有限步内收敛到问题的全局最优这一不足,提出了运用鞅方法来研究CSO算法的全局收敛性.首先,基于CSO算法的相关定义,建立CSO算法的... 详细信息

针对鸡群优化(chicken swarm optimization, CSO)算法已有的收敛性分析结果属于弱收敛,不能保证算法能在有限步内收敛到问题的全局最优这一不足,提出了运用鞅方法来研究CSO算法的全局收敛性.首先,基于CSO算法的相关定义,建立CSO算法的马尔可夫(Markov)链模型,分析其Markov性质;其次,将具有最小适应度值的鸡群状态序列转化成上鞅,利用上鞅收敛定理和Egoroff定理证明了CSO算法的几乎处处强收敛性和一致收敛性,进而得出了当鸡群状态空间有限时,CSO算法能确保在有限步内收敛到问题的全局最优这一结论;最后,在仿真实验中成功验证了理论证明的正确性,并发现CSO算法比其他算法具有更强的寻优能力和更高的收敛精度.

关键词： CSO算法 Markov链上鞅收敛定理 Egoroff定理几乎处处强收敛一致收敛

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基于EMSDBO算法的无人机三维航迹规划

系统工程与电子技术 2024年第5期46卷 1756-1766页

作者：隋东杨振宇丁松滨周婷婷南京航空航天大学民航学院江苏南京211106

针对无人机(unmanned aerial vehicle,UAV)三维航迹规划问题,提出一种增强型多策略蜣螂算法的UAV航迹规划方法。首先,将飞行接近率和响应时间的动态约束添加到威胁成本代价中,并考虑UAV转弯性能的影响,建立三维任务空间模型与航迹代价... 详细信息

针对无人机(unmanned aerial vehicle,UAV)三维航迹规划问题,提出一种增强型多策略蜣螂算法的UAV航迹规划方法。首先,将飞行接近率和响应时间的动态约束添加到威胁成本代价中,并考虑UAV转弯性能的影响,建立三维任务空间模型与航迹代价函数。其次,在蜣螂算法中引入偏移估计策略、变螺旋搜索策略、准反向学习策略和逐维变异策略,提高算法的全局寻优能力和收敛速度。最后,给出了改进算法在三维环境下航迹规划的仿真结果。结果表明:综合考虑UAV机动性能和转弯性能,规划出的路径可以更加安全有效地避开危险源。相比其他算法,改进算法的寻优能力更好,规划的航迹质量更优。

关键词：无人机路径规划飞行接近率蜣螂优化算法