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Carbon Oxyanion Self-Transformation on NiFe Oxalates Enables Long-Term Ampere-Level Current Density Seawater Oxidation

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Angewandte Chemie 2023年第1期136卷

作者： Zixiao Li Dr. Yongchao Yao Shengjun Sun Jie Liang Shaohuan Hong Hui Zhang Chaoxin Yang Xuefeng Zhang Zhengwei Cai Jun Li Yuchun Ren Yongsong Luo Dongdong Zheng Xun He Dr. Qian Liu Prof. Yan Wang Prof. Feng Gong Prof. Xuping Sun Prof. Bo Tang College of Chemistry Chemical Engineering and Materials Science Shandong Normal University Jinan 250014 Shandong China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 610054 Sichuan China Department of Laboratory Medicine Precision Medicine Center West China Hospital Sichuan University Chengdu 610041 Sichuan China Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and Environment Southeast University Nanjing 211189 Jiangsu China Institute for Advanced Study Chengdu University Chengdu 610106 Sichuan China School of Materials and Energy University of Electronic Science and Technology of China Chengdu 610054 Sichuan China Laoshan Laboratory Qingdao 266237 Shandong China

Seawater electrolysis is an attractive way of making H 2 in coastal areas, and NiFe-based materials are among the top options for alkaline seawater oxidation (ASO). However, ample Cl − in seawater can severely corrode catalytic sites and lead to limited lifespans. Herein, we report that in situ carbon oxyanion self-transformation (COST) from oxalate to carbonate on a monolithic NiFe oxalate micropillar electrode allows safeguard of high-valence metal reaction sites in ASO. In situ/ex situ studies show that spontaneous, timely, and appropriate COST safeguards active sites against Cl − attack during ASO even at an ampere-level current density ( j ). Our NiFe catalyst shows efficient and stable ASO performance, which requires an overpotential as low as 349 mV to attain a j of 1 A cm −2 . Moreover, the NiFe catalyst with protective surface CO 3 2− exhibits a slight activity degradation after 600 h of electrolysis under 1 A cm −2 in alkaline seawater. This work reports effective catalyst surface design concepts at the level of oxyanion self-transformation, acting as a momentous step toward defending active sites in seawater-to-H 2 conversion systems.

关键词： Carbonate Chlorine Chemistry Electrolysis Electrostatic Repulsion Seawater Oxidation

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Electric vehicle controller driving efficiency and power batteries pack capacity detecting test-bed design

IPPTA: Quarterly Journal of Indian Pulp and Paper Technical ...

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IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association 2018年第5期30卷 712-721页

作者： Ding, Zuowu School of Automotive and Rail Transit Nanjing Institute of Technology Nanjing China Jiangsu Key Laboratary of Advanced Numerical Control Technology Nanjing China

In order to compare the driving efficiency of different brand electric vehicle controller, to compare the capacity of different brand power batteries pack with the same nominal capacity, a test-bed with function of electric vehicle controller efficiency and power batteries pack capacity detecting is designed and made. The test-bed includes inertia load wheel speed detecting circuit, driving motor speed control circuit, power batteries pack current detecting circuit, power batteries pack terminal voltage detecting circuit, electric vehicle controller, auxiliary controller, inertia load wheels, speed changer, driving motor, load generator, power batteries pack, and so on. The auxiliary controller uses PID algorithm to control the electric vehicle controller. The electric vehicle controller makes the driving motor run at target “time-speed” curve been planned in advance. The efficiency of the 3 different brand electric vehicle controllers are detected, and 2 kinds of battery capacity are detected. The test results provide a basis for vehicle manufacturers to judge the performance of different brand electric vehicle controllers and power batteries pack. © 2018 Indian Pulp and Paper Technical Association. All Rights Reserved.

关键词： Efficiency

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Design of multi-bus communication system for E-workshop

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AIP Conference Proceedings 2019年第1期2073卷

作者： Hao Zhu Xiaochun Zhu Ye Zhang 1Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing Institute of Technology Nanjing 211167 China

In order to solve the defects of the low level of intelligence, poor scalability and low communication rate of the point-to-point protocol converter in the traditional E-workshop. Based on the existing CAN/RS485/Ethernet protocol, a workshop communication system based on STM32F4 control chip is designed. The communication interface of CAN/RS485/Ethernet and the software implementation of protocol conversion are given. The simulation and experimental results show that the data transmission rate of the communication system is significantly better than the traditional point-to-point protocol converter, and the data transmission is accurate and the bit error rate is low. Therefore, the communication system is more in line with the development needs of manufacturing communications.

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Communication scheduling design of multi-agent system based on improved Greedy algorithm

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AIP Conference Proceedings 2019年第1期2073卷

作者： Hao Zhu Xiaochun Zhu Ye Zhang 1Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing Institute of Technology Nanjing 211167 China

Based on the SIEMENS PLC control system, a multi agent system model of e workshop is established. The real-time data transmission problem and delay model are analyzed. On this basis, the traditional Greedy algorithm is improved and applied to multi Agent systems. The simulation results show that the algorithm can effectively improve the efficiency of system scheduling. The more tasks the system has, the longer the scheduling time saved.

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Adaptive Fault-Tolerant control of A Two-car High-speed Train Model with Inter-car Flexible Link and Traction Actuator Failures*

Adaptive Fault-Tolerant Control of A Two-car High-speed Trai...

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Asian control Conference

作者： Zehui Mao Gang Tao Bin Jiang Xing-Gang Yan Yali Xue Ministry of Industry and Information Technology and Jiangsu Key Laboratory of Internet of Things and Control Technologies (NUAA) Key Laboratory of Navigation Control and Health Management Technologies of Advanced Aircraft (NUAA) Department of Electrical and Computer Engineering University of Virginia Charlottesville VA USA School of Engineering and Digital Arts University of Kent Canterbury United Kingdom

ISBN: (纸本)9781728102634

This paper studies the adaptive fault-tolerant tracking control problem for the high-speed trains with intercar flexible link and traction actuator failures. This study is focused on a benchmark model which, as a main dynamic unit of the CRH (China Railway High-speed) train, is a two-car dynamic system with a flexible link between two cars, for which the input acts on the second car and the output is the speed of the first car. This model is under parameter uncertainties and subject to uncertain actuator failures. For such an underactuated system, to ensure the first car tracking a desired speed trajectory, a coordinate transformation method is employed to decompose the system model into a control dynamics subsystem and a zero dynamics subsystem. Stability analysis is conducted to show that such a zero dynamic system is Lyapunov stable and is partially input-to-state stable. An adaptive fault-tolerant controller is developed which is able to ensure the closed-loop system signal boundedness and desired speed tracking, in the presence of the actuator failures and unknown system parameters. Simulation results from a realistic train dynamic model are presented to verify the effectiveness of the adaptive controller.

关键词： Automobiles Actuators Fault tolerance Fault tolerant systems Adaptation models Aerodynamics Adaptive systems

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SERS molecular-ruler based DNA aptamer single-molecule and its application to multi-level optical storage

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Chemical Engineering Journal 2022年 433卷

作者： Ning Feng Lei Zhang Jingjing Shen Yanling Hu Weibing Wu Essy Kouadio Fodjo Shufen Chen Wei Huang Lianhui Wang Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China School of Electrical and Control Nanjing Polytechnic Institute 188 Xinle Road Nanjing 211500 China Jiangsu Provincial Key Lab of Pulp & Paper Science & Technology Nanjing Forestry University159 Longpan Road Nanjing 210037 China Laboratory of Constitution and Reaction of Matter University of Felix Houphouet-Boigny 22 BP 582 Abidjan 22 Cote d’Ivoire Frontiers Science Center for Flexible Electronics (FSCFE) Shaanxi Institute of Flexible Electronics (SIFE) Shaanxi Institute of Biomedical Materials and Engineering (SIBME) Northwestern Polytechnical University (NPU) 127 West Youyi Road Xi'an 710072 China

Real-time analysis of DNA aptamer conformational changes is essential to understanding the function of DNA aptamers at the single-molecular level. Herein, we design core-satellite nanostructures as surface-enhanced Raman scattering (SERS) molecular-rulers to monitor the change process of single Hg 2+ aptamer under dark-field microscopy (DFM-) correlated Raman spectroscopy. Applying the SERS molecular-ruler, the individual Hg 2+ aptamer conformational change events triggered by Hg 2+ that leads to the stepwise closing of the satellite to the core is continuously monitored by changes in SERS intensity. Moreover, individual Hg 2+ aptamer conformational change events are confirmed by in-situ scanning electron microscopy (SEM) and finite difference time-domain (FDTD) calculation. Furthermore, the SERS molecular-ruler is a valid method for studying aptamer intermediate states, the binding sites in aptamer and the kinetics of Hg 2+ aptamer configuration change at the single-molecule level. Such findings are promising for exploring the mechanism of DNA aptamer configuration change and providing the fundamental understanding for designing various DNA aptamer based biological applications. For future applications, SERS molecular-ruler has the potential to realize multi-level optical storage and presents a new practical and effective method for designing multi-level storage system.

关键词： SERS Surface-enhanced Raman scattering DFM Dark-field microscopy SEM Scanning electron microscopy FDTD Finite difference time-domain TERS Tip-enhanced Raman spectroscopy AuNP Gold nanoparticle R Relaxed T Taut PAGE Polyacrylamide gel electrophoresis LSPR Localized surface plasmon resonance ITO Indium tin oxide TEM Transmission electron microscopy 4-MBA 4-mercaptobenzoic acid EF Enhancement factor MPTES 3-mercaptopropyltriethoxysilane Tetrahedral DNA structure SERS molecular-ruler Hg 2+ aptamer conformational change Stepwise rises of Raman intensity Multi-level optical storage

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Simultaneous estimation of system states and identification of time-varying parameters for discrete-time systems via iterative learning estimation

Simultaneous estimation of system states and identification ...

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第三十八届中国控制会议

作者： Ruitian Yang Li Peng Yongqing Yang Fengzeng Zhu Engineering Research Center of Internet of Things Applied Technology (School of IoT Engineering Jiangnan University) Ministry of Education Jiangsu Province Internet of Things Application Technology Key Construction Laboratory Wuxi Taihu College School of Science Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) School of Science Jiangnan University

In this paper, the state estimation problem and identifying time-varying parameters are investigated for discrete-time systems with time delays. The time delays comprise both state delay and measurement delay. A novel iterative learning estimator which is utilized to eliminate the effects of state delay and measurement delay is presented for the general systems. The main idea on the design of the iterative learning estimator is to combine the previous information into the proposed estimator for identifying time-varying parameters in real time by the use of learning. The sufficient conditions for the solvability of the addressed problem are obtained in terms of certain linear matrix inequalities(LMIs). An explicit expression of the desired iterative learning estimator is also given. Finally, a numerical example is provided to demonstrate the effectiveness and applicability of the proposed design approach.

关键词： State estimation Parameters identification Discrete-time systems Iterative learning estimator

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Effects of structural parameters on hydraulic performance of flow regulator

Effects of structural parameters on hydraulic performance of...

引用

CSAA/IET International Conference on Aircraft Utility Systems, AUS 2018

作者： Li, Yong Zong, Xuemei Yuan, Xiaoming Zhao, Shiyi State Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery Jiangsu Xuzhou Construction Machinery Research Institute Xuzhou Construction Machinery Group Co. Ltd. Xuzhou China Hebei Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University Qinhuangdao Hebei China

ISBN: (纸本)9781785617911

In order to evaluate the hydraulic performance of a regulator, the pressure loss and the stabilization performance of the regulator installed in the fire water monitor were introduced. The effects of structures on a regulator were investigated by the structural model made in UG and the flow simulation conducted in ANSYS. The hydraulic performance of a star-shaped regulator was analyzed with different structure parameters, such as the blade number, axial length and rounded-corner. The effects of structure parameters on the regulator were revealed, based on which the hydraulic performance of the improved regulator with different blade numbers was analyzed. The results show that the improved regulator with two cross-sections in dislocation and six even-distributed blades has the better hydraulic performance. The preliminary experimental results show that the improved regulator can improve the jet range of a fire water monitor. © 2018 IET Conference Publications. All rights reserved.

关键词： Flow simulation

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Entanglements and correlations of one-dimensional quantum spin-1/2 chain with anisotropic power-law long range interactions

arXiv

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arXiv 2020年

作者： Ren, Jie You, Wen-Long Wang, Xiaoqun Department of Physics Changshu Institute of Technology Changshu215500 China College of Science Nanjing University of Aeronautics and Astronautics Nanjing211106 China School of Physical Science and Technology Soochow University SuzhouJiangsu215006 China Key Laboratory of Artificial Structures and Quantum Control of MOE Shenyang National Laboratory for Materials Science School of Physics and Astronomy Tsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai200240 China Collaborative Innovation Center for Advanced Microstructures Nanjing University Nanjing210093 China Beijing Computational Science Research Center Beijing100084 China

The correlations, entanglement entropy, and fidelity susceptibility are calculated for a one-dimensional spin-1/2 XXZ chain with anisotropic power-law long range interactions by employing the density matrix renormalization group method. In particular, this long-range interaction is assigned to ferromagnetic for transversal components, while it can be either ferro- or antiferromagnetic for the longitudinal spin component. Two ground-state phase diagrams are established versus the anisotropy of the interactions which not only changes the phase boundaries of the counterparts with short-range interactions, but also leads to the emergence of exotic phases. We found that the long-range interactions of the z-component results in a Wigner crystal phase, whereas the transversal one may break a continuous symmetry, resulting in a continuous symmetry breaking phase. Copyright © 2020, The Authors. All rights reserved.

关键词： Anisotropy

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Mapping the elastic properties of two-dimensional MoS_(2) via bimodal atomic force microscopy and finite element simulation

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npj Computational Materials 2018年第1期4卷 246-253页

作者： Yuhao Li Chuanbin Yu Yingye Gan Peng Jiang Junxi Yu Yun Ou Dai-Feng Zou Cheng Huang Jiahong Wang Tingting Jia Qian Luo Xue-Feng Yu Huijuan Zhao Cun-Fa Gao Jiangyu Li State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics&AstronauticsNanjing 210016 JiangsuChina Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055 GuangdongChina Department of Mechanical Engineering Clemson UniversityClemsonSC 29634-0921USA Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105 HunanChina Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment Hunan University of Science and TechnologyXiangtan 411201 HunanChina School of Physics and Electronic Science Hunan University of Science and TechnologyXiangtan 411201 HunanChina Institute of Biomedicine and Biotechnology Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055 GuangdongChina Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518055 GuangdongChina Department of Mechanical Engineering University of WashingtonSeattleWA 98195USA

Elasticity is a fundamental mechanical property of two-dimensional(2D)materials,and is critical for their application as well as for strain ***,accurate measurement of the elastic modulus of 2D materials remains a challenge,and the conventional suspension method suffers from a number of *** this work,we demonstrate a method to map the in-plane Young’s modulus of mono-and bi-layer MoS_(2) on a substrate with high spatial *** atomic force microscopy is used to accurately map the effective spring constant between the microscope tip and sample,and a finite element method is developed to quantitatively account for the effect of substrate stiffness on *** these methods,the in-plane Young’s modulus of monolayer MoS_(2) can be decoupled from the substrate and determined as 265±13 GPa,broadly consistent with previous reports though with substantially smaller *** is also found that the elasticity of mono-and bi-layer MoS_(2) cannot be differentiated,which is confirmed by the first principles *** method provides a convenient,robust and accurate means to map the in-plane Young’s modulus of 2D materials on a substrate.

关键词： modulus modal element

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