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Low-temperature replacement construction of three-dimensional corrosion-resistant interface for deeply rechargeable Zn metal batteries

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Nano Materials Science 2024年第3期6卷 329-336页

作者： Jinze Li Daniel Rohrens Gianluca Dalfollo Xiaochao Wu Ziheng Lu Qiang Gao Bo Han Ruimin Sun chenggang zhou Jindi Wang Zhao Cai Faculty of Materials Science and Chemistry China University of GeosciencesWuhan430074China Institute of Inorganic Chemistry RWTH Aachen UniversityAachen52074Germany Microsoft Research AI4Science Beijing10080China Institute of New Energy on Chemical Storage and Power Sources College of Applied Chemistry and Environmental EngineeringYancheng Teachers UniversityYancheng224000China

Aqueous Zn batteries are promising candidates for grid-scale renewable energy *** electrodes have been widely investigated and applied as anode materials for aqueous Zn batteries,however,they suffer from limited surface area and severe interfacial issues including metallic dendrites and corrosion side reactions,limiting the depth of discharge(DOD)of the foil electrode ***,a low-temperature replacement reaction is utilized to in-situ construct a three-dimensional(3D)corrosion-resistant interface for deeply rechargeable Zn foil ***,the deliberate low-temperature environment controlled the replacement rate between polycrystalline Zn metal and oxalic acid,producing a Zn foil electrode with distinct 3D corrosion-resistant interface(3DCI-Zn),which differed from conventional two-dimensional(2D)protective structure and showed an order of magnitude higher surface ***,the 3DCI-Zn electrode exhibited dendrite-free and anticorrosion properties,and achieved stable plating/stripping performance for 1000 h at 10 mA cm^(-2)and 10 mAh cm^(-2)with a remarkable DOD of 79%.After pairing with a MnO2cathode with a high areal capacity of 4.2 mAh cm^(-2),the pouch cells delivered 168 Wh L^(-1)and a capacity retention of 89.7%after 100 cycles with a low negative/positive(N/P)ratio of 3:1.

关键词： Aqueous batteries Foil electrodes Depth of discharge Dendrites Corrosion side reactions

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果蔬分拣设备研究现状及发展趋势

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中国农机化学报 2024年第8期45卷 120-125页

作者：柳军孔杰皮杰周成钢江苏大学农业工程学院江苏镇江212013 江苏省农业科学院农业设施与装备研究所南京市210014

果蔬商品化产后处理能力较低导致我国的果蔬在国际市场上核心竞争力不足,其中后处理最主要的步骤就是果蔬分拣,而果蔬分拣设备能够有效的提高分拣效率,解放劳动力。分别从市场和科研两方面阐述国内外果蔬分拣设备的现状,分析现有果蔬分... 详细信息

果蔬商品化产后处理能力较低导致我国的果蔬在国际市场上核心竞争力不足,其中后处理最主要的步骤就是果蔬分拣,而果蔬分拣设备能够有效的提高分拣效率,解放劳动力。分别从市场和科研两方面阐述国内外果蔬分拣设备的现状,分析现有果蔬分拣设备存在的问题,讨论未来果蔬分拣的研究趋势,提出人工智能与机器视觉相结合的果蔬外部品质分拣技术和近红外光谱分析的内部品质分拣技术将是近期的研究热点,同时对易损果蔬采后分拣场景提出一种机械臂抓取式分拣设备方案,为后期解决娇嫩易损、精品果蔬的分拣问题提供参考。

关键词：果蔬分拣设备发展趋势机器视觉近红外光谱机械臂

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半金属氢氧化物材料用于电化学水氧化

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Science China Materials 2024年第5期67卷 1551-1558页

作者：王静 Mohammed-Ibrahim Jamesh 高强韩波孙睿敏 Hsien-Yi Hsu 周成冈蔡钊 Faculty of Materials Science and Chemistry China University of GeosciencesWuhan430074China School of Energy and Environment Department of Materials Science and EngineeringCity University of Hong KongKowloon TongHong Kong999077China

寻找具有高本征活性的水氧化催化剂材料对许多清洁能源技术的发展至关重要.氢氧化物半导体对析氧反应具有一定的电催化活性.然而,该材料导电性较差,限制着其电催化本征活性的提升.本文提出一种兼具高导电性和高催化活性的半金属氢氧化... 详细信息

寻找具有高本征活性的水氧化催化剂材料对许多清洁能源技术的发展至关重要.氢氧化物半导体对析氧反应具有一定的电催化活性.然而,该材料导电性较差,限制着其电催化本征活性的提升.本文提出一种兼具高导电性和高催化活性的半金属氢氧化物析氧电催化材料.通过阳离子掺杂和阴离子空位协同作用,镍铁水滑石半导体可转化为半金属材料,其电阻率降低了两个数量级.相应半金属氢氧化物阵列电极的电催化活性显著提升,在10 mA cm^(-2)电流密度下其析氧过电势仅为195 mV,Tafel斜率仅为40.9 mV dec^(-1),显著优于商用RuO_(2)催化剂(316 mV,99.6 mV dec^(-1)).原位拉曼光谱和理论计算结果表明,半金属氢氧化物可在较低过电位下转化为羟基氧化物中间体,有助于高价态金属活性位点的形成与稳定,从而提升材料的析氧本征活性.本研究表明,兼具优异导电性和催化活性的半金属氢氧化物可作为先进的电极材料.

关键词： electrocatalyst hydroxide semi-metal electric conductivity intrinsic activity

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基于硅基过滤片的精子优选芯片设计与优化

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传感器与微系统 2024年第2期43卷 81-84,88页

作者：李金坤童先宏江小华周典法魏钰周成刚中国科学技术大学微电子学院安徽合肥230026 中国科学技术大学附属第一医院(安徽省立医院)生殖中心安徽合肥230001 中国科学技术大学微纳研究与制造中心安徽合肥230026

利用半导体工艺技术构建了一种基于硅基过滤片的精子优选微流控芯片,具有高活力的精子会克服重力,在微孔的引导下游向精子收集池。分别在7,15,30,60 min对收集池中的精子取样,采用计算机辅助精子分析(CASA)系统进行精液常规检测、精子... 详细信息

利用半导体工艺技术构建了一种基于硅基过滤片的精子优选微流控芯片,具有高活力的精子会克服重力,在微孔的引导下游向精子收集池。分别在7,15,30,60 min对收集池中的精子取样,采用计算机辅助精子分析(CASA)系统进行精液常规检测、精子形态学和DNA碎片分析;对硅基过滤片的孔间距和筛选时间进行了优化。结果表明:6μm孔间距和15 min筛选时间为最佳的精子优选方案。所构建的基于硅基过滤片的精子优选芯片,可以有效优选出具有高活力且DNA完整性和形态正常率较高的精子。芯片精液吞吐量大,活动精子回收率较高,有一定的临床价值,同时提供了一种简单易操作的标准化精子优选流程。

关键词：硅基过滤片精子优选微流控芯片 DNA碎片率精子形态

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防护林杨树对玉米田捕食性天敌的影响

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生物灾害科学 2024年第2期47卷 269-273页

作者：杨龙周成刚付均惠泰安市林业保护发展中心山东泰安271000 山东农业大学植物保护学院山东泰安271018 泰安市泰山林业科学研究院山东泰安271000

【目的】为摸清防护林杨树对玉米田中捕食性天敌的影响及其对天敌迁移生存提供的重要作用。【方法】在玉米田施药和收获前后,通过野外设计样地调查,利用数理统计方法分析防护林对玉米田中主要捕食性天敌瓢虫和草蛉的栖息分布和种群动态... 详细信息

【目的】为摸清防护林杨树对玉米田中捕食性天敌的影响及其对天敌迁移生存提供的重要作用。【方法】在玉米田施药和收获前后,通过野外设计样地调查,利用数理统计方法分析防护林对玉米田中主要捕食性天敌瓢虫和草蛉的栖息分布和种群动态的影响。【结果】瓢虫在玉米田中的数量分布与距边界杨树林的距离成正相关,草蛉在玉米田中的数量分布与距边界杨树林的距离成负相关,其中草蛉的相关性达到显著水平(相关系数为-0.917,P<0.05);在离玉米田不同距离的树林中天敌的数量分布不均匀,靠近玉米田的林带上瓢虫的数量约是草蛉的3倍,而树林中间林带上草蛉的数量约是瓢虫的2.5倍。【结论】在玉米田喷施农药和收获等因素的影响下,防护林杨树成为瓢虫和草蛉类天敌重要的栖息地和过渡场所,能够为农田中天敌群落恢复重建缩短时间及提供种群库,在农田害虫种群生态调控中起重要作用。

关键词：防护林杨树玉米捕食性天敌栖息地避难所

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Impact of the Complex Terrain in Beijing on Formation of Low-Level Jets

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Journal of Meteorological Research 2024年第1期38卷 138-150页

作者： Li’ao zhou chenggang WANG Shiguang MIAO Ju LI School of Atmospheric Physics Nanjing University of Information Science&TechnologyNanjing 210044 Institute of Urban Meteorology China Meteorological AdministrationBeijing 100089 Key Laboratory of Urban Meteorology China Meteorological AdministrationBeijing 100089

This study investigated how the Taihang Mountains and the Yanshan Mountains affect low-level jets(LLJs)in the Beijing area,based on conventional radiosonde observations from Nanjiao Observatory(2016–2017)and high-resolution Weather Research and Forecasting–Advanced Research WRF(WRF-ARW)model *** of radiosonde observations indicated that LLJs in the study area are mainly from the southwest and northwest directions,with occurrence frequency of 44.6%and 33.0%,***(northwest)LLJs are aligned parallel(perpendicular)to the orientation of the Taihang Mountain *** sensitivity experiments using the WRF-ARW model were then conducted to examine the effects of terrain forcing on the northwest and southwest LLJs,with adopted terrain heights of 100%and 50%.The results showed that for northwest LLJs,reduction in the elevation of the Taihang Mountain Range led to weakening of jet intensity by approximately 20%and reduction in jet maximum height by approximately 250 m;lowering the Yanshan Mountain Range had minor influence on the northwest LLJs,with only a 5.2%reduction in intensity and no substantial change in jet maximum *** southwest LLJs,reduction in the elevation of both the Taihang and Yanshan Mountain ranges resulted in minor changes in the intensity and height of the *** analysis revealed that the topography in the Beijing area could modulate the height and intensity of the stable layer by altering the inversion structure within the boundary *** LLJs can develop rapidly within the stable layer,and both the location and the scale of the jet core exhibited reasonable agreement with the extent of the stable layer.

关键词： low-level jets(LLJs) mesoscale numerical simulation terrain forcing

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Optimizing evasive maneuvering of planes using a flight quality driven model

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Science China(Information Sciences) 2024年第3期67卷 197-208页

作者： Chang LIU Shaoshan SUN chenggang TAO Yingxin SHOU Bin XU School of Automation Northwestern Polytechnical University Chengdu Aircraft Design & Research Institute of AVIC

This paper investigates the optimal evasive maneuver for a plane to avoid an incoming missile. To accurately model the system dynamics while improving computational efficiency, a simplified plane model based on flight quality is established. A missile model with proportional guidance is also *** problem of determining the optimal evasion plane maneuver is formulated. The Gauss pseudospectral method(GPM) is proposed as a solution to find the optimal maneuver. The optimized maneuver is validated by testing it on a high-fidelity 6-degree-of-freedom(6-DOF) model, which demonstrates the effectiveness of the proposed simplified plane model. The Monte Carlo method is employed to evaluate the capability of the plane to evade missiles in various scenarios and elucidate general principles for successful evasion.

关键词： optimal maneuver flying quality evasive strategy pursuit-evasion game air-to-air combat

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Electric field-induced oscillation of sessile droplets

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Chinese Science Bulletin 2011年第28期56卷 3082-3086页

作者： JIANG chenggang SHI LiTao zhou Ping WU ChengWei State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engi1~eering Mechanics Faculty of Vehicle Engineering and Mechanics Dalian University of Technology Dalian 116024 China

We report a novel oscillatory behavior of a sessile droplet on a hydrophobic surface. The droplet was placed on an electrode with a hydrophobic surface and close to, but not touching, a second needle-like electrode. The change in the contact angle was observed only when the droplet oscillated. In a traditional electro-wetting experiment, however, the contact angle decreased immediately when an alternating current electric field was applied. In addition, the non-contact mode gave rise to a true sessile condition of the droplet, whose oscillation amplitude was not linearly proportional to the driving voltage but reached a maximum value.

关键词：振荡行为电场诱导液滴固着表面疏水性疏水表面非接触式驱动电压

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Disturbances rejection optimization based on improved two-degree-of-freedom LADRC for permanent magnet synchronous motor systems

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Defence Technology（防务技术） 2024年第3期33卷 518-531页

作者： chenggang Wang Jianhu Yan Wenlong Li Liang Shan Le Sun School of Automation Nanjing University of Science and TechnologyNanjing 210094China

Permanent magnet synchronous motor(PMSM)speed control systems with conventional linear active disturbance rejection control(CLADRC)strategy encounter issues regarding the coupling between dynamic response and disturbance suppression and have poor performance in suppressing complex nonlinear *** order to address these issues,this paper proposes an improved two-degree-of-freedom LADRC(TDOF-LADRC)strategy,which can enhance the disturbance rejection performance of the system while decoupling entirely the system's dynamic and anti-disturbance performance to boost the system robustness and simplify controller parameter *** models that consider total disturbances are developed to design the TDOF-LADRC speed controller ***,to evaluate the control performance of the TDOF-LADRC strategy,its stability is proven,and the influence of each controller parameter on the system control performance is *** on it,a comparison is made between the disturbance observation ability and anti-disturbance performance of TDOF-LADRC and CLADRC to prove the superiority of TDOF-LADRC in rejecting ***,experiments are performed on a 750 W PMSM experimental platform,and the results demonstrate that the proposed TDOF-LADRC exhibits the properties of two degrees of freedom and improves the disturbance rejection performance of the PMSM system.

关键词： Permanent magnet synchronous motor(PMSM) Active disturbance rejection control(ADRC) Disturbance observer Two-degree-of-freedom control Anti-disturbance

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ControlService: a containerized solution for control-algorithm-as-a-service in cloud control systems

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Science China(Information Sciences) 2024年第8期67卷 172-189页

作者： chenggang SHAN Runze GAO Zhen YANG Wei ZHANG Yuanqing XIA School of Artificial Intelligence Zaozhuang University School of Automation Beijing Institute of Technology

As an extension of networked control systems, cloud control systems(CCSs) have emerged as a new control paradigm to improve the service quality of emerging control missions, such as data-driven modeling and automated vehicles. Existing studies have used the workflow-based restructured method to optimize the computation-intensive algorithms in the CCSs. However, the challenges here are how to define and submit these algorithms' workflows as cloud services and execute these algorithms' workflows in a containerized manner. Based on these challenges, we propose a containerized solution for the control-algorithm-as-a-service(C3aS) in the CCSs, namely Control Service. It offers the control algorithm as a cloud workflow service and uses a customized workflow engine to realize the containerized execution. First, we employ a cloud workflow representation method to define a control algorithm into an abstract cloud workflow form. Afterward, we provide a cloud service representation of the abstract cloud workflow. Next, we design a workflow engine and submit the cloud service to this workflow engine to implement containerized execution of this cloud service in the CCSs. In the experiment, we discuss the cloud service form and containerized implementation of the subspace identification method. Experimental results show that the proposed Control Service has significant performance advantages in computational time, reduction percentage, and speedup ratio compared with the baseline method.

关键词： cloud control systems control-algorithm-as-a-service containerization workflow engine cloud workflow service subspace identification

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