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Symmetry-breaking of LiMn_(6) hexatomic-ring in grain surface of Li_(2)MnO_(3)

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Journal of Energy Chemistry 2023年第6期 110-117,I0004页

作者： Lihang Wang Shu Zhao Boya wang Haijun Yu Institute of Advanced Battery Materials and Devices Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China

LiMn_(6) hexatomic-rings act as functional units in Li-rich layered oxides(LLOs),which determine the capacity,voltage,and structural stability of LLOs.However,the symmetry of the LiMn_(6) hexatomic-ring is always broken,especially in the grain surface of LLOs,which will greatly affect its electrochemical performance.Herein,the symmetry-breaking of LiMn_(6) hexatomic-ring in the grain surface of Li_(2)MnO_(3) was studied,and their effect on charge compensation mechanism and structure evolution behavior was thoroughly investigated.The results show that the electrochemical activity of the symmetry-broken LiMn_(6) hexatomic-ring is higher than that of the unbroken LiMn_(6),and the former is more favorable for spinelization on the grain surface.Furthermore,the exposure proportion of crystallographic planes with different symmetry-broken LiMn_(6) hexatomic-ring has also been discussed,which can be adjusted by changing the partial pressure of oxygen.The in-depth understanding of the symmetry-breaking of LiMn_(6) hexatomic-ring will provide more targeted strategies for designing high-performance LLOs cathodes for lithium-ion batteries.

关键词： Li-rich layered oxides LiMn_(6)functional unit Symmetry-breaking Surface structure Density functional theory

Catalytic oxidation of vinyl chloride over Co-Ce composite oxides derived from ZIF-67 template:Effect of cerium incorporation

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Journal of Rare Earths 2023年第6期41卷 870-880,I0003页

作者： Hongliang Zhang Shuoming wang Mingju wang Guanghao Li lihang Yu Xuehua Liu Zhong wang Chuanhui Zhang Institute of Materials for Energy and Environment College of Materials Science and EngineeringQingdao UniversityQingdao 266071China Key Laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China

Transition metal oxides are regarded as an economical and efficient catalytic alternate for catalytic oxidation of volatile organic compounds(VOCs)emissions.The morphological decoration and the incorporation of extrinsic metals were demonstrated to be effective strategies for achieving noticeable catalytic improvement.In this work,a novel Co-Ce composite oxides catalyst was obtained by the pyrolysis of ZIF-67 template with the impregnation of certain cerium cations(denoted as ZIF-CoCe).Compared with the reference Co-Ce composite oxides by the sol-gel(denoted as SG-CoCe)and physical mixing(denoted as MIX-CoCe)methods,ZIF-CoCe delivers significantly higher catalytic activity for vinyl chloride oxidation,which are demonstrated to be closely related with its superior redox capacity,more abundance of surface active Co^(3+)sites and adsorbed active oxygen species from oxygen vacancies.In addition,the unique cage-like morphological feature of the Co-based catalysts derived from ZIF-67 template plays a crucial function in kinetically facilitating the mass transfer of catalytic reaction and promoting the catalytic VC oxidation activity.With regard to in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTs)analysis,enol and carboxylic acid species are identified to be the key organic intermediates during catalytic vinyl chloride oxidation.

关键词： Rare earth Catalytic oxidation Cerium incorporation Redox behavior Surface oxygen species

Compound Impedance Control of a Hydraulic Driven Parallel 3UPS/S Manipulator

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Chinese Journal of Mechanical Engineering 2020年第4期33卷 63-76页

作者： Lihang Wang Shaofei Cui Chong Ma Lijie Zhang Hebei Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan UniversityQinhuangdao 066004China Key Laboratory of Advanced Forging&Stamping Technology and Science Ministry of Education of ChinaYanshan UniversityQinhuangdao 066004China

The hydraulic parallel manipulator combines the high-power density of the hydraulic system and high rigidity of the parallel mechanism with excellent load-carrying capacity.However,the high-precision trajectory tracking control of the hydraulic parallel manipulator is challenged by the coupling dynamics of the parallel mechanism and the high nonlinearities of the hydraulic system.In this study,the trajectory control of a 3-DOF symmetric spherical parallel 3UPS/S manipulator is evaluated.Focusing on the highly coupling and nonlinear system dynamics,a compound impedance control method for a hydraulic driven parallel manipulator is proposed,which combines impedance control with the spatial motion characteristics of a parallel manipulator.The control strategy is divided into the inner and outer loops.The inner loop controls the impedance of the actuator in the joint space,and the outer loop controls the impedance of the entire platform in the task space to compensate the coupling of the actuators and improve the tracking accuracy of the moving platform.Compound impedance control does not require force or pressure sensors and is less dependent on modeling precision.The experimental results show that the compound impedance control effectively improves the tracking accuracy of the moving platform.This research proposes a compound impedance control strategy for a 3-DOF hydraulic parallel manipulator,which has high tracking precision with a simple and cheap system configuration.

关键词： Parallel manipulator Impedance control Hydraulic servo system Trajectory tracking

Research of Pipeline Pressure Based on the Reliability Theory

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Journal of Energy and Power Engineering 2016年第5期10卷 292-295页

作者： Lihang Wang Pingping Sun School of Petroleum Engineering Yangtze University Wuhan 430100 China

The former gas pipeline operating pressure transmission determined mostly according to the determined formula into the corresponding pipeline parameters are obtained, and the parameters of the actual pipeline due to many reasons, such as measurement error, production batch, etc., is not a fixed value. This paper on pipeline integrity established limit state equation, using Monte Carlo method to calculate the gas pipeline in different pressures of reliability, according to the API (American Petroleum Institute) 579 recommended target reliability to determine the operating pressure of the different regions, and design coefficient method, the calculated results are compared, results of calculation reliability is more reasonable and improve the delivery pressure of the area, the pipeline safety management provides the basis.

关键词：可靠性理论管道压力美国石油学会极限状态方程蒙特卡罗方法计算结果工作压力输气管道

基于特征事件的数控电火花线切割加工工艺过程建模及能耗计算

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计算机集成制造系统 2018年第5期24卷 1124-1137页

作者：郑军王黎航浙江大学机械工程学院浙江杭州310027 浙江科技学院机械与汽车工程学院浙江杭州310023

为了科学准确地分析数控电火花线切割加工工艺过程的电能消耗情况,实现对线切割加工工艺过程的准确描述,提出一种基于特征事件的数控电火花线切割加工工艺过程建模方法。根据数控电火花线切割加工工艺过程特性,将加工工艺过程分解为5类... 详细信息

为了科学准确地分析数控电火花线切割加工工艺过程的电能消耗情况,实现对线切割加工工艺过程的准确描述,提出一种基于特征事件的数控电火花线切割加工工艺过程建模方法。根据数控电火花线切割加工工艺过程特性,将加工工艺过程分解为5类典型事件和4类典型特征;结合正常加工时的运动特性,总结了正常加工时的9种基本事件和14种基本特征,并从NC代码中提取工艺过程的事件及能耗特征,实现了对加工工艺过程的建模。在该模型基础上,利用特征事件实现了数控电火花线切割加工工艺过程的能耗计算,为后续优化数控电火花线切割加工工艺奠定了理论基础。结合某典型凸模零件电火花线切割加工工艺过程进行验证,估算了该零件的加工工艺过程能耗。

关键词：电火花线切割加工特征事件过程建模 NC代码数控系统

基于NTIS的美国政府人工智能科技合同分析

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科技情报研究 2023年第3期5卷 103-118页

作者：王立航陈果南京理工大学经济管理学院南京210094

[目的/意义]科技合同是美国政府资助相关机构开展基础性、系统性研究的重要形式。文章创新性地探索利用科技合同揭示美国政府在人工智能领域的科技资助和战略布局。[方法/过程]NTIS科技报告的合同号字段,可用于揭示若干科技报告围绕同... 详细信息

[目的/意义]科技合同是美国政府资助相关机构开展基础性、系统性研究的重要形式。文章创新性地探索利用科技合同揭示美国政府在人工智能领域的科技资助和战略布局。[方法/过程]NTIS科技报告的合同号字段,可用于揭示若干科技报告围绕同一合同目标开展持续性研究的情况。文章以NTIS中人工智能领域科技报告合同号为切入点,识别其中多个重要的科技合同,并逐一解读其背景信息;随后,进一步围绕最重要的4个科技合同,以点带面地揭示它们在全领域和人工智能领域的研究主题。[结果/结论]对重要科技合同的解读结果,能够深入揭示美国政府在引导人工智能研究上的战略布局和行业特点,弥补了传统基于科技论文、科技项目分析结果的片面性,表明基于NTIS的科技合同分析是跟踪美国科技战略布局的有效方法。

关键词：人工智能 NTIS 科技报告科技合同

Reliability Analysis of Gas Pipeline with Corrosion Defects

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材料科学与工程（中英文B版） 2016年第2期6卷 101-104页

作者： wang lihang School of Petroleum Engineering Yangtze University Wuhan 430100 China

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气象短视频的制作与传播技巧

电视技术 2022年第12期46卷 103-105页

作者：游立杭王彦琦福建省气象服务中心福建福州350001

网络短视频的快速发展,带来了新媒体气象服务新方式。为了更好地应用短视频进行气象服务,笔者根据工作实践进行总结,从气象短视频的特点与价值出发,提出气象短视频的策划制作和传播运营技巧,并对气象短视频的前景进行展望,以期抛砖引玉... 详细信息

网络短视频的快速发展,带来了新媒体气象服务新方式。为了更好地应用短视频进行气象服务,笔者根据工作实践进行总结,从气象短视频的特点与价值出发,提出气象短视频的策划制作和传播运营技巧,并对气象短视频的前景进行展望,以期抛砖引玉,为推动气象影视新媒体服务进步作出贡献。

关键词：气象短视频制作技巧气象影视新媒体

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论“互联网+”技术与现代医疗卫生服务

学术前沿 2017年第24期 15-23页

作者：王小万刘丽杭中国医学科学院卫生政策与管理研究中心中南大学公共管理学院

"互联网+"技术赋予医疗卫生服务创新发展全新的理念、生态环境以及社会健康治理模式。在促进传统医疗卫生服务体系由专业化与碎片化服务向集约化与系统化方向发展的同时,亟须解决全面战略部署缺乏,发展路径不明朗,相应规范、标准甚至政... 详细信息

"互联网+"技术赋予医疗卫生服务创新发展全新的理念、生态环境以及社会健康治理模式。在促进传统医疗卫生服务体系由专业化与碎片化服务向集约化与系统化方向发展的同时,亟须解决全面战略部署缺乏,发展路径不明朗,相应规范、标准甚至政策、法律不完善等一系列问题。在国家"互联网+"的强国战略思想指导下,现代医疗卫生服务事业通过加强顶层设计与战略指引,实施创新驱动,整合资源配置,从技术、经济、标准、政策、人才、安全等方面更好地把握"互联网+"相关技术快速发展带来的历史机遇,走出创新发展之路。

关键词： “互联网+” 医疗服务健康治理卫生政策