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arXiv 2024年

作者： He, Zhicheng Wu, Jiayang Zhang, Jingwen Zhang, Shibowen Shi, Yapeng Liu, Hangxin Sun, Lining Su, Yao Leng, Xiaokun Department of Computer Science Harbin Institute of Technology Harbin150001 China Beijing100080 China School of Mechatronics Engineering Harbin Institute of Technology Harbin150080 China Jiangsu Provincial Key Laboratory of Advanced Robotics School of Mechanical and Electric Engineering Soochow University Suzhou215000 China

Performing acrobatic maneuvers like dynamic jumping in bipedal robots presents significant challenges in terms of actuation, motion planning, and control. Traditional approaches to these tasks often simplify dynamics to enhance computational efficiency, potentially overlooking critical factors such as the control of centroidal angular momentum (CAM) and the variability of centroidal composite rigid body inertia (CCRBI). This paper introduces a novel integrated dynamic planning and control framework, termed centroidal dynamics model-based model predictive control (CDM-MPC), designed for robust jumping control that fully considers centroidal momentum and non-constant CCRBI. The framework comprises an optimization-based kinodynamic motion planner and an MPC controller for real-time trajectory tracking and replanning. Additionally, a centroidal momentum-based inverse kinematics (IK) solver and a landing heuristic controller are developed to ensure stability during high-impact landings. The efficacy of the CDM-MPC framework is validated through extensive testing on the full-sized humanoid robot KUAVO in both simulations and experiments. Copyright © 2024, The Authors. All rights reserved.

关键词： Model predictive control

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Palladium-Catalyzed Amination of Alkynes with Diaziridinone Via a Palladacycle. an Approach to Polysubstituted Pyrroles

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SSRN 2024年

作者： Li, Junhua Liu, Yadong Shi, Yian Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering Institute of Natural and Synthetic Organic Chemistry Changzhou University Changzhou213164 China

This work describes a Pd-catalyzed efficient amination of dialkyl acetylenedicarboxylates with di-t-butyldiaziridinone, providing a variety of polysubstituted pyrroles in good yields. The reaction likely proceeded through a palladiacyclopentadiene intermediate, which was aminated with the diaziridinone to give the corresponding pyrrole with formation of two C-N bonds. © 2024, The Authors. All rights reserved.

关键词： Catalysis

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Microstructure and strength in ultrastrong cold-drawn medium carbon steel

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Journal of Materials Science & technology 2022年第2期97卷 89-100页

作者： Hanchen Feng Lei Cai Linfeng Wang Xiaodan Zhang Feng Fang Jiangsu Key Laboratory of Advanced Metallic Materials Southeast UniversityNanjing 211189China Sunnywell(China)New Material Technology Co.Ltd Changzhou 213200China Technical center of Baosteel Metal Co. LtdShanghai 200940China Department of Mechanical Engineering Technical University of DenmarkLyngbyDenmark

Via traditional wire drawing,the medium carbon ferrite-pearlite(MCFP)steel wires can achieve the ultrahigh strength beyond 4 GPa normally for high-carbon pearlitic steel wires,but have a 30-60%lower production *** microstructural evolution and mechanical properties of medium carbon ferrite-pearlite steel wires have been investigated by means of scanning electron microscopy,transmission electron microscopy and tensile *** tensile strength of medium carbon ferrite-pearlite steel wires increases from 750 MPa up to 4120 MPa when the drawing strain increases up toε=6.4,which represents the highest strength reported so far-to our knowledge for a carbon steel with such low carbon *** low and medium strains(ε≤1.95),the proeutectoid ferrite forms dense dislocation walls(DDWs)via dislocation activities,including sliding,accumulation,interaction,and *** the drawing strain increase,the reorientation of DDWs to the drawing direction forms the coarse proeutectoid ferrite ***,the proeutectoid ferrite deformed to high strains is characterized by a lamellar morphology and the average lamellar spacing of proeutectoid ferrite is about 55 nm atε=*** interlamellar spacing of pearlite and thickness of cementite decreases with the drawing strain *** dislocation density in ferrite lamellae increases with the drawing strain increases,and the dislocation density in ferrite lamellae is 7.8×10^(15)m^(2)atε=4.19.A higher dislocation density of 3.1×10^(16)m^(2)can be obtained atε=6.4 by means of extrapolation and TEM *** stress contributions of proeutectoid ferrite and pearlite to the flow stress are estimated based on quantified structural *** on the assumption that the stress contributions from different strengthening mechanisms are linearly additive and the general rule of mixtures,a good agreement between the measured and estimated flow stresses has been found in a large range of flow *** good applica

关键词： Medium carbon ferrite-pearlite steel Strengthening mechanisms Microstructure Mechanical properties Strength

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Low-complexity RNNE with multiple hidden layers for optical PAM-4 signals 27

Low-complexity RNNE with multiple hidden layers for optical ...

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27th OptoElectronics and Communications Conference/International Conference on Photonics in Switching and Computing, OECC/PSC 2022

作者： Liu, Caoyang Sun, Lin Xiao, Jiawang Mao, Bangning Liu, Gordon Ning School of Electronic and Information Engineering Suzhou Key Laboratory of Advanced Optical Communication Network Technology Soochow University Jiangsu Suzhou215006 China College of Optical and Electronic Technology China Jiliang University Hangzhou310018 China

We investigate a multiple hidden layers RNNE for nonlinearly equalized optical PAM-4 signals. Simulations indicate up to 24.3% complexity reduction can be obtained than the single hidden laver one. © 2022 IEICE.

ISBN: (数字)9784885523366

ISBN: (纸本)9784885523366

关键词： Complex networks

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Ag@Pt等离激元复合纳米结构中热电子级联传输增强电催化反应

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Science China Materials 2023年第6期66卷 2227-2234页

作者：梁文凯刘远兰卞文逸秦伟王雅雯郭为李东曾华杰钟俊孙迎辉林海平江林 Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China College of Energy Soochow Institute for Energy and Materials Innovations and Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006China School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710062China

将具有高催化活性的材料与等离激元金属纳米材料复合是制备局域表面等离激元共振增强电催化剂的常用策略.然而,这种复合方式不仅会降低等离激元材料的局域表面等离激元共振强度,同时会改变等离激元电磁场的逸散方式以及热电子在复合结... 详细信息

将具有高催化活性的材料与等离激元金属纳米材料复合是制备局域表面等离激元共振增强电催化剂的常用策略.然而,这种复合方式不仅会降低等离激元材料的局域表面等离激元共振强度,同时会改变等离激元电磁场的逸散方式以及热电子在复合结构内部的传输途径,无法实现最佳的等离激元增强效果.在此,我们选择了简单的Ag@Pt双金属纳米立方体作为研究对象,深入探究了热电子在金属异质结构内部的激发和传输机制以及其在电化学析氢反应中的贡献.相应的实验和理论结果证实,Pt在Ag表面的复合会改变等离激元电磁场的逸散方式,促进激发产生更多热电子,同时热电子可以通过级联传输方式转移至复合结构表面,显著增强电催化反应.这项工作为等离激元金属异质结构催化剂的设计和应用提供了重要参考.

关键词：局域表面等离激元共振电催化反应等离激元复合结构纳米立方体异质结构复合纳米结构金属纳米材料

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Toxic Gas Dispersion and Risk Assessment Considering Crowd Movement Conditions

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SSRN 2024年

作者： Li, Guangying Yu, Xiao Yao, Fuyao Lin, Yunru Yao, Bin Zong, Ruowen State Key Laboratory of Fire Science University of Science and Technology of China Anhui Hefei230026 China Suzhou Key Laboratory of Urban Public Safety Suzhou Institute for Advanced Research University of Science and Technology of China Jiangsu Suzhou215123 China

Massive releases of toxic gases usually lead to large-scale evacuations, while traffic force generated by crowd movements could affect the diffusion and spread of gases. Previous risk assessment methods mainly focused on the variation of gas concentration with time at different fixed locations and did not consider the coupled effect of obstacle motion and gas dispersion. This work combines gas dispersion modeling with crowd motion and introduces a respiratory frequency factor to improve personnel risk assessment methods in the presence of toxic gas dispersion by taking into account changes in respiratory rate due to movement speed. The approach is applied to a hypothetical scenario where an accidental chlorine gas leak in a chemical factory has triggered the evacuation of people towards the exits. The temporal and spatial distribution characteristics of the toxic gas concentration in the movement of the crowd after the dispersion of the toxic gas were investigated, to predict the hazardous consequences in each part of the crowd. © 2024, The Authors. All rights reserved.

关键词： Risk assessment

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调节铜催化剂表面分子亲电性以调控电催化二氧化碳还原选择性

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Science China Materials 2024年第6期67卷 1858-1865页

作者：周贤龙单洁琼郑敏李欢夏宝玉郑尧 School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaideSA 5005Australia Key Laboratory of Material Chemistry for Energy Conversion and Storage(Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service FailureNational Laboratory for OptoelectronicsSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources College of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China

Cu是唯一能选择性将二氧化碳电还原(CRR)为多碳产物的过渡金属.然而,调控Cu的CRR选择性获得多种产物仍非常具有挑战性.本文选择了一系列具有不同亲电性的分子来修饰Cu催化剂以调控其CRR选择性,从而产生CH_(4)或C_(2)H_(4).理论计算表明... 详细信息

Cu是唯一能选择性将二氧化碳电还原(CRR)为多碳产物的过渡金属.然而,调控Cu的CRR选择性获得多种产物仍非常具有挑战性.本文选择了一系列具有不同亲电性的分子来修饰Cu催化剂以调控其CRR选择性,从而产生CH_(4)或C_(2)H_(4).理论计算表明,分子的亲电性决定催化反应中的质子活度,进而能促进或抑制CRR中的质子耦合电子转移(PCET)过程.实验发现,低亲电性分子(如1,2-双(4-吡啶基)乙烷)可以促进质子转移,加快^(*)CO中间体氢化过程而生成CH_(4),实现58.2%的法拉第效率;而高亲电性分子(如顺-1,2-双(4-吡啶基)乙烯)能构建强的氢键以稳定^(*)CO中间体,促进其偶联生成C_(2)H_(4),实现65.9%的法拉第效率.理论计算结合原位光谱表征揭示,分子亲电性可调节催化剂质子活度,影响CRR反应中^(*)CO氢化或偶联,进而调控CRR选择性.不同于常规的催化剂结构工程,本策略通过调节CRR中的PCET过程来调控选择性,为CRR的发展提供了新的认识.

关键词： molecular electrophilicity Cu catalysts proton transfer CO_(2)electroreduction C1/C2 selectivity

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Fastly converged transfer learning using neuron-pruning nonlinear equalizer for intra data center networking 27

Fastly converged transfer learning using neuron-pruning nonl...

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27th OptoElectronics and Communications Conference/International Conference on Photonics in Switching and Computing, OECC/PSC 2022

作者： Xiao, Jiawang Sun, Lin Liu, Caoyang Mao, Bangning Liu, Gordon Ning School of Electronic and Information Engineering Suzhou Key Laboratory of Advanced Optical Communication Network Technology Soochow University Jiangsu Suzhou215006 China College of Optical and Electronic Technology China Jiliang University Hangzhou310018 China

We introduce a neuron-connections pruning neural network equalizer (NNE) into transfer learning of intra data center networking. Accelerated convergence of NNE during transfer learning can be obtained. © 2022 IEICE.

ISBN: (数字)9784885523366

ISBN: (纸本)9784885523366

关键词： Photonics

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Recent advances of covalent organic frameworks-based photocatalysts:Principles,designs,and applications

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Chinese Journal of Catalysis 2025年第3期70卷 142-206页

作者： Hongjun Dong Chunhong Qu Chunmei Li Bo Hu Xin Li Guijie Liang Jizhou Jiang Advanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu Province Institute of Green Chemistry and Chemical TechnologySchool of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013JiangsuChina Baicheng Normal University Baicheng 137000JilinChina Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and Utilization of Ministry of Agriculture and Rural AffairsKey Laboratory for Biobased Materials and Energy of Ministry of EducationCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510642GuangdongChina School of Environmental Ecology and Biological Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationWuhan Institute of TechnologyWuhan 430205HubeiChina Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053HubeiChina

Covalent organic frameworks(COFs)semiconductor materials have garnered significant attention in solar to chemical energy conversion owing to their unique properties,including structural tunability,pre-design capability,large surface area,abundant pore structures,high crystallinity,excellent chemical stability,suitable energy-band structure,fast charge carrier transfer and so *** intrinsic features endow COFs with the remarkable candidates for various photocatalytic applications including photocatalytic H_(2) generation from water reduction,CO_(2) reduction,degradation of organic pollutants,N_(2) fixation,H_(2)O_(2) evolution,and even organic ***,this review comprehensively summarizes the recent advancements in COF-based materials for the above photocatalytic reactions,including the historic overview of the COF in the photocatalysis field,the fundamentals and design philosophy of COF-based photocatalysts,the advances of synthesis strategies,the structural characteristics and diversities,the practical applications in various photocatalytic fields as well as the challenges and future development direction in terms of COFs material and application *** sincerely hope this review can offer symbolic guidelines for future development COF semiconductor materials in this promising field.

关键词： Covalent organic framework Photocatalysis Structural feature Energy conversion Environmental purification

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Visible-Light-Enabled Radical Alkynylborylation of Activated Alkenes

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Synthesis 2023年第11期56卷 1711-1718页

作者： Congjun Zhu Shunruo Yao Jin Xie School of Chemistry and Chemical Engineering Henan University of Technology State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center (ChemBIC) School of Chemistry and Chemical EngineeringNanjing University

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