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“海绵城市”理念在市政内涝防治方面的应用研究

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市政设施管理 2024年第1期 59-61页

作者：余昭炜广州市第三市政工程有限公司

随着“城市病”的出现,中国的城市面临着严峻的挑战。特别是,由于城市的快速发展,带来的内涝灾难给当地的经济、文明和生态带来了重大的危害。现提出了一系列的措施,包括加强城市的规划,完善相关的政策法律法规,加强基础设施的维护,提... 详细信息

随着“城市病”的出现,中国的城市面临着严峻的挑战。特别是,由于城市的快速发展,带来的内涝灾难给当地的经济、文明和生态带来了重大的危害。现提出了一系列的措施,包括加强城市的规划,完善相关的政策法律法规,加强基础设施的维护,提升居民的生活质量。文章通过采取海绵城市理论,可以实现在未经改造的情况下,通过采取低影响开发技术,维护城市河道和湖泊的稳态,从而降低城市内涝和泥沙排放,最终实现城市环境改善。此外,还可以根据城市实际情况,制定相应的优化措施,以期望能够更好地实现城市绿色可持续发展。

关键词：内涝灾害海绵城市雨洪管理优化

Supplier Development under Supply Risk and Reputational Risk

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Journal of Systems Science and Systems Engineering 2024年第3期33卷 360-388页

作者： zhaowei Miao yu Wang Rongjing Zhu Lili Shangguan School of Management Xiamen UniversityXiamen361005China School of Economics and Management Tsinghua UniversityBeijing100084China

This paper considers the supplier investment decision-making problem in a supply chain consisting of an original equipment manufacturer(OEM),a global supplier,and a local *** reduce dependence on global suppliers and improve supply stability,we develop a differential game model to investigate the optimal investment decisions of the OEM towards the local supplier under different risk scenarios and the impact of different risks on the optimal *** results show that investment efficiency and risks have a significant impact on OEM investment ***,when the OEM has higher investment efficiency,investing in the local supplier is profitable for the OEM;conversely,when the investment efficiency of the OEM is lower,it does not *** addition,an increase in the supply risk of the global supplier will lower the entry threshold for OEM investment,but an increase in the supply risk of the local supplier and the reputational risk of both will increase this threshold,meaning that only the OEM with significantly higher investment efficiency can profit.

关键词： Supplier investment supplier development supply risk reputational risk dual sourcing

Isogeometric Analysis for the Arbitrary AFG Microbeam with Two-Phase Nonlocal Stress-Driven Model

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Acta Mechanica Solida Sinica 2024年第2期37卷 341-360页

作者： Pei-Liang Bian zhaowei Liu Hai Qing Tiantang yu Department of Engineering Mechanics Hohai UniversityNanjing211100China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing210016China

Scale effects play critical roles in the mechanical responses of *** isogeometric analysis was developed here to investigate the mechanical responses of an axially functionally graded *** Euler–Bernoulli beam model was utilized,and size effects in the structure were modeled with a stress-driven two-phase local/nonlocal integral *** governing equation of microstructures was given in an equivalent differential form with two additional constitutive boundary *** framework was verified and utilized to analyze the microbeam’s static and dynamic mechanical *** present work showed great potential for modeling various types of functionally graded microstructures.

关键词： Isogeometric analysis Size effect Functionally graded material Nonlocal theory Euler-Bernoulli beam

Na_(3)P interphase reduces Na nucleation energy enabling stable anode-less sodium metal batteries

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Journal of Energy Chemistry 2024年第9期96卷 448-455页

作者： Haizhao Yang Haifeng Lv En Zhou Xiaohao Ji Chunnian Chen Haolei yu zhaowei Sun Dawei Zhang Hongchang Jin Xianghua Kong Hengxing Ji Department of Chemistry and Chemical Engineering Hefei University of TechnologyHefei 230009AnhuiChina Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026AnhuiChina

Sodium metal batteries(SMBs)are rising as viable alternatives to lithium-ion systems due to their superior energy density and sodium's relative ***,SMBs face significant impediments,particularly the exceedingly high negative-to-positive capacity ratios(N/P ratios)which severely encumber energy density and hinder their practical ***,a novel nucleophilic Na_(3)P interphase on aluminum foil has been designed to significantly lower the nucleation energy barrier for sodium atom deposition,resulting in a remarkable reduction of nucleation overpotential and efficient mitigation of dendritic growth at high sodium deposition of 5 mA h cm^(−2).The interphase promotes stable cycling in anode-less SMB configurations with a low N/P ratio of 1.4 and high cathode mass loading of 11.5 mg cm^(−2),and demonstrates a substantial increase in high capacity retention of 92.4%after 500 cycles even under 1 C rate *** innovation signifies a promising leap forward in the development of high-energy-density,anode-less SMBs,offering a potential solution to the longstanding issues of cycle stability and energy efficiency.

关键词： Anode-less Phosphorus anode Nucleation buffer layer Sodium metal Dendrite-free

Bacterial microcompartment-mimicking Pickering emulsion droplets for detoxification of chemical threats under sweet conditions

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Science China Chemistry 2024年第9期67卷 3039-3049页

作者： Xiao Xu Wenqi Xie Ting Wu Chen Chen Xiaoning Chen yuheng Yang Hao Lian Hao Chen Xiaofeng Cheng Zhitong Chen Guojun Chen Chaoqun Liu Lanlan Chen yu He zhaowei Chen Bernard P.Binks Huanghao Yang New Cornerstone Science Laboratory MOE Key Laboratory for Analytical Science of Food Safety and BiologyCollege of ChemistryFuzhou UniversityFuzhou 350002China Institute of Biomedical and Health Engineering Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Biomedical Engineering and the Rosalind&Morris Goodman Cancer Research Institute McGill UniversityMontreal QC H3A 1A3Canada School of Pharmacy Henan UniversityKaifeng 475004China Department of Chemistry University of HullHull HU67RXUK

Chemical warfare agents represent a severe threat to mankind and their efficient decontamination is a global ***,traditional disposal strategies have limitations,including high energy consumption,use of aggressive reagents and generation of toxic ***,inspired by the compartmentalized architecture and detoxification mechanism of bacterial microcompartments,we constructed oil-in-water Pickering emulsion droplets stabilized by hydrogen-bonded organic framework immobilized cascade enzymes for decontaminating mustard gas simulant(2-chloroethyl ethyl sulfide,CEES)under sweet *** exemplified droplet systems were developed with two-enzyme(glucose oxidase/chloroperoxidase)and threeenzyme(invertase/glucose oxidase/chloroperoxidase)cascades,both achieving over 6-fold enhancement in decontamination efficiency compared with free enzymes and>99% selectivity towards non-toxic *** found that the favored mass transfer of sugars and CEES from their respective phases to approach the cascade enzymes located at the droplet surface and the facilitated substrate channeling between proximally immobilized enzymes were key factors in augmenting the decontamination *** importantly,the robustness of immobilized enzymes enabled easy reproduction of both the droplet formation and detoxification performance over 10 cycles,following long-term storage and in far-field locations.

关键词： Pickering emulsion biomimetics chemical warfare agent bacterial microcompartment biocatalysis

基于动态感兴趣区域的光照无关车道线检测算法

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计算机工程 2017年第2期34卷 43-47,56页

作者：鱼兆伟吴晓波沈林后勤工程学院后勤信息与军事物流工程系重庆401311

为保证自动驾驶的安全性和高效性,基于Hough变换与投票法找到道路图像的消隐点,以此建立动态感兴趣区域,根据白色与黄色车道线的颜色特性设计光照无关车道线检测算法,实现夜晚、隧道等复杂光照环境下的车道线区域检测。在此基础上,设计... 详细信息

为保证自动驾驶的安全性和高效性,基于Hough变换与投票法找到道路图像的消隐点,以此建立动态感兴趣区域,根据白色与黄色车道线的颜色特性设计光照无关车道线检测算法,实现夜晚、隧道等复杂光照环境下的车道线区域检测。在此基础上,设计极角约束算法对候选车道线进行筛选,得到最终的有效车道线。实验结果表明,该算法在复杂光照环境下具有较好的检测效果,平均检测准确率高达93.5%。

关键词：自动驾驶车道线检测 Hough变换动态感兴趣区域光照无关极角约束

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TA5钛合金万瓦光纤激光焊接工艺研究

稀有金属材料与工程 2024年第2期53卷 417-423页

作者：雷小伟刘甲余巍陈利阳马照伟符成学洛阳船舶材料研究所河南洛阳471000

采用10 mm TA5钛合金,开展了万瓦级光纤激光焊接工艺研究。焊接过程高速摄影表明,当激光功率达到3~4 kW时,羽辉严重,飞溅及烟尘增加明显;不同功率焊缝截面形貌试验表明,较低焊接功率时,焊缝截面呈“楔形”,当激光功率达到6 kW以上时焊... 详细信息

采用10 mm TA5钛合金,开展了万瓦级光纤激光焊接工艺研究。焊接过程高速摄影表明,当激光功率达到3~4 kW时,羽辉严重,飞溅及烟尘增加明显;不同功率焊缝截面形貌试验表明,较低焊接功率时,焊缝截面呈“楔形”,当激光功率达到6 kW以上时焊缝截面过渡为“漏斗形”。采用激光功率为10~11 k W,焊接速度为1100~1500 mm/min的工艺得到成型优良的“小孔型”焊接试板,焊缝变为具有较大深宽比的典型的高能束形貌,深宽比达到2:1,对焊缝进行射线和渗透检测,满足无损检测标准要求;对焊接接头进行力学性能和工艺性能测试,结果表明:焊接接头强度可达800 MPa,弯曲测试能够满足标准,断口韧窝明显,为韧性断裂;金相测试显示,焊缝区截面为“束腰”形貌,柱状晶区明显,各柱状晶区有明显的竞争生长模式。焊缝区主要为锯齿状α+点状β。硬度检测显示,焊缝区相比母材硬度略有升高,热影响区硬度最低,满足钛合金接头硬度要求。

关键词： TA5钛合金大功率激光焊焊缝截面形貌接头性能

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航空燃气涡轮-电混合动力系统关键技术分析

推进技术 2024年第3期45卷 73-83页

作者：伏宇刘昭威郑天慧王鹏中国航发四川燃气涡轮研究院四川成都610500

本文介绍了串联式和并联式混合动力系统的基本原理与性能特点,对混合动力的性能优势来源进行了原理性阐述。针对混合动力的系统架构,分析了性能设计、控制系统、电机设计以及热管理方面的关键技术。航空燃气涡轮-电混合动力技术的发展,... 详细信息

本文介绍了串联式和并联式混合动力系统的基本原理与性能特点,对混合动力的性能优势来源进行了原理性阐述。针对混合动力的系统架构,分析了性能设计、控制系统、电机设计以及热管理方面的关键技术。航空燃气涡轮-电混合动力技术的发展,有可能对传统航空发动机领域产生颠覆性变革。需要打破原有航空发动机热力机械设计思维,将动力系统所涉及的推进、电能以及热管理进行融合设计,推动航空动力系统效能进一步提升。

关键词：燃气涡轮电推进混合动力航空发动机综述

面向熔岩管探测的星球子车及其参数化设计方法研究

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机械工程学报 2023年第1期59卷 19-34页

作者：黄澜于兆玮丁亮杨怀广高海波邓宗全杨辰光哈尔滨工业大学机器人技术与系统国家重点实验室哈尔滨150080 西英格兰大学布里斯托机器人实验室英国布里斯托BS161QY

星球熔岩管是进入星球地下的捷径,具有较高的科学探测及资源勘探价值。提出了一种新型系绳星球熔岩管探测子车,并开展其参数化设计研究。面向熔岩管管口大坡度斜坡绳索释放回收问题以及熔岩管内探测车转向问题对系绳轮式移动机构进行了... 详细信息

星球熔岩管是进入星球地下的捷径,具有较高的科学探测及资源勘探价值。提出了一种新型系绳星球熔岩管探测子车,并开展其参数化设计研究。面向熔岩管管口大坡度斜坡绳索释放回收问题以及熔岩管内探测车转向问题对系绳轮式移动机构进行了构型设计。基于地面力学理论,考虑三轮移动系统在熔岩管口周围及管底堆积区松软地形内移动能力,以及探测车在崎岖硬质熔岩管内壁中的几何通过性、平稳性和抗颠覆性等因素对系绳三轮移动系统进行了参数优化设计。在模拟外星球地表环境中的仿真和试验结果表明,使用提出的优化设计方法设计出来的星球车完全满足预定的技术要求,相比于参数优化之前具备更强的移动性能,并可为四轮、六轮等多轮星球车参数化设计提供有益借鉴。

关键词：熔岩管探测星球子车参数化设计多轮移动系统地面力学