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基于改进象群算法的配电网混合线路故障定位方法分析

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电力设备管理 2024年第11期 135-137页

作者：赵义鑫程冠华山东省新泰市供电公司

为了提高含有电缆和架空线的混合配电网络中故障识别的准确性,研究人员提出了一种改进的象群优化算法来应对这一复杂挑战。首先,考虑到故障信号在配电系统中的传播特性和系统结构,深度探讨了多端行波信息的特点,以此为基础,创建了一种... 详细信息

为了提高含有电缆和架空线的混合配电网络中故障识别的准确性,研究人员提出了一种改进的象群优化算法来应对这一复杂挑战。首先,考虑到故障信号在配电系统中的传播特性和系统结构,深度探讨了多端行波信息的特点,以此为基础,创建了一种有效的问题解决模式,并将其转换成寻求最佳解决方案的过程。接着,利用改进象群算法与OPTICS分组算法,对初始搜寻结果中各部分进行了归类,以便找出可能存在的时钟同步错误的数据。随后,引入正常的数据进行二次搜寻,实现更高的准确度故障辨识。仿真试验显示,该方法无须事先设定行波速率就能获得高效率的故障诊断,同时具备较强的时钟偏移抗干扰能力。

关键词：混合线路配电网行波定位象群优化算法时间同步误差

Dealloying-induced dual-scale nanoporous indium-antimony anode for sodium/potassium ion batteries

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Journal of Energy Chemistry 2022年第12期75卷 154-163,I0005页

作者： Hui Gao Yan Wang Zhiyuan Guo Bin Yu guanhua cheng Wanfeng Yang Zhonghua Zhang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061ShandongChina School of Materials Science and Engineering University of JinanJinan 250022ShandongChina

InSb alloy is a promising candidate for sodium/potassium ion batteries(SIBs/PIBs)but challenged with achieving high performance by dramatic volumetric ***,nanoporous(np)-InSb with dualscale phases(cubic/hexagonal(C/H)-InSb)was fabricated by chemical dealloying of ternary Mg-In-Sb *** X-ray diffraction(XRD)and ex-situ characterizations well rationalize the dealloying/alloying mechanisms and the formation of dual-scale microstructures/*** an anode for SIB/PIBs,the np-InSb electrode exhibits superior reversible capacities and lifespan compared with the monometallic porous(p)-In electrode,stemming from the dealloying-induced dual-scale nanoporous architecture and alloying strategy with proper *** operando XRD results demonstrate that the(de)sodiated mechanism of the np-InSb electrode involves a two-step(de)alloying process,while the(de)potassiated mechanism is associated with a full electrochemically-driven amorphization upon ***,the gas evolution during the(dis)charge process was monitored by on-line mass spectrometry.

关键词： Sodium/potassium ion battery Indium-antimony anode Dealloying Operando X-ray diffraction On-line mass spectrometry

Phase-boundary regulation boosting electrochemical reactivity of tin-based anodes for magnesium-ion batteries

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Science China Chemistry 2022年第7期65卷 1433-1444页

作者： Meijia Song Yan Wang Conghui Si Wenrun Cui Wanfeng Yang guanhua cheng Zhonghua Zhang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China School of Materials Science and Engineering University of JinanJinan 250022China Shandong Provincial Key Laboratory of Processing and Testing Technology of Glass&Functional Ceramics School of Materials Science and EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

Tin(Sn)-based materials are promising anodes for magnesium-ion batteries(MIBs) owing to their low reaction voltages, high theoretical specific capacities and good compatibility with conventional electrolytes. However, relatively arduous alloying reaction and sluggish diffusion kinetics limit their practical applications. Herein, we proposed a general strategy to regulate the electrochemical reactivity and performance of Sn-based anodes for Mg storage through the introduction of the second phase and phase boundary. The biphase Sn–Al, Sn–Pb and Sn–Zn O films were further fabricated via magnetron co-sputtering. Taking Sn–Al as an example, it has been revealed that the introduction of Al can effectively stimulate the electrochemical reaction of Sn with Mg in either nanoscale or bulk through combining experiments with density-functional theory calculations. Specially, the rolled Sn–Al electrode exhibits superior long-term stability over 5,000 cycles. Additionally, the Mg-storage mechanism of the Sn–Al electrode was investigated by operando X-ray diffraction. The Sn–Al anodes also demonstrate good compatibility with simple Mg-salt-based electrolytes like Mg(TFSI)2in full cells. More importantly, it has been authenticated that the activation effect of second phase and phase boundary to Sn is also applicable to Pb and Zn O. Our findings may provide a favorable reference for the development of alloy-type anodes for MIBs.

关键词： magnesium-ion batteries Sn-based anodes phase boundary magnetron sputtering density-functional theory calculation

Self-templating synthesis and structural regulation of nanoporous rhodium-nickel alloy nanowires efficiently catalyzing hydrogen evolution reaction in both acidic and alkaline electrolytes

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Nano Research 2023年第2期16卷 2026-2034页

作者： Zhihua Zhai Yan Wang Conghui Si Pan Liu Wanfeng Yang guanhua cheng Zhonghua Zhang Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China School of Materials Science and Engineering University of JinanJinan 250022China Shandong Provincial Key Laboratory of Processing and Testing Technology of Glass&Functional Ceramics School of Materials Science and EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China Shanghai Key Laboratory of Advanced High Temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Highly active and stable electrocatalysts to produce hydrogen through water splitting are crucial for clean energy systems but are still ***,a novel self-templating strategy was proposed to synthesize one-dimensional nanoporous RhNi alloy nanowires through combining metallurgical eutectic solidification and microalloying with chemical ***-situ X-ray diffraction and ex-situ characterizations reveal that the Al matrix served as a template to guide the growth of the Al3(Ni,Rh)nanowires during eutectic solidification of Al-Ni-Rh precursor and was completely removed in the dealloying ***,the nanowire morphology could be well retained and the dealloying of Al_(3)(Ni,Rh)led to the formation of nanoporous RhNi alloy *** length scale of the RhNi nanowires could be facilely regulated by changing the solidification *** importantly,the RhNi catalysts show excellent electrocatalytic activity and stability towards hydrogen evolution reaction in both acidic and alkaline media,which has been rationalized by density functional theory calculations.

关键词： nanoporous alloys nanowires hydrogen evolution reaction density functional theory dealloying

Theoretical and experimental cocrystal screening of temozolomide with a series of phenolic acids, promising cocrystal coformers

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Chinese Chemical Letters 2024年第5期35卷 407-417页

作者： Hongmei Yu Baoxi Zhang Meiju Liu cheng Xing Guorong He Li Zhang Ningbo Gong Yang Lu guanhua Du Beijing Key Laboratory of Polymorphic Drugs Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China Beijing City Key Laboratory of Drug Target Identification and Drug Screening Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

The virtual cocrystal screening approach based on molecular electrostatic potential surface(MEPS)maps is a fast and feasible computational method to estimate the probability of cocrystal formation by calculating the difference in the interaction site pairing energies of monomers and that of their assemblies prior to experimental *** this paper,we report 12 cocrystal forms of temozolomide with mono-,di-,and trihydroxy benzoic acids,namely,3-hydroxy-,2,4-dihydroxy-,2,5-dihydroxy-,2,6-dihydroxy-,3,4-dihydroxy-,and 3,4,5-trihydroxy-benzoic acids,as well as benzoic acid,as pharmaceutical coformers for the first time.10 single crystals out of the 12 cocrystal forms were obtained and unequivocally determined by single-crystal X-ray diffraction,which clarified spatial arrangements,molecular conformations,and supramolecular *** further gains some insights into the sites of hydrogen bonding interactions for exploring combination patterns in these *** stability of TMZ was successfully achieved by cocrystallization with these acids.

关键词： Virtual Cocrystal Temozolomide Supramolecular synthon Phenolic acid Stability

木版年画的历史钩沉与文化再认识——评《中国雕版年画》

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民艺 2022年第4期 136-138页

作者：程冠华贵州科技出版社

“年画”,也称“门神画”“木版年画”。这一中国古老的民间艺术以其简约、浓烈的艺术风格和寄寓其中的美好祝愿,传递着中国人民淳朴、向善的生活态度。关于年画的记载早已有之,在《山海经》中就有唐朝时期,张贴“秦叔宝”“尉迟恭”以... 详细信息

“年画”,也称“门神画”“木版年画”。这一中国古老的民间艺术以其简约、浓烈的艺术风格和寄寓其中的美好祝愿,传递着中国人民淳朴、向善的生活态度。关于年画的记载早已有之,在《山海经》中就有唐朝时期,张贴“秦叔宝”“尉迟恭”以驱邪的记载;宋朝王安石的《元日》诗云:“爆竹声中一岁除,春风送暖入屠苏。千门万户曈曈日,总把新桃换旧符。”年画可谓中国民间最普遍、最大众的艺术品。然而,自唐朝始,历经宋朝的发展和明清时的极盛,年画在新中国成立后短暂地焕发过新生便归于沉寂。许多在明清时期和民国时期鼎盛一时的年画产地也再难寻觅年画艺人的踪迹。

关键词：尉迟恭历史钩沉木版年画唐朝时期《山海经》千门万户春风送暖艺术风格

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《混凝土结构基本原理》课程的教学模式改革

科技资讯 2017年第1期15卷 130-131页

作者：赵博程冠华太原理工大学建筑与土木工程学院山西太原030024 太原广播电视大学山西太原030006

"混凝土结构基本原理"课程是土木工程类专业中非常重要的一门专业基础课,该文在分析其课程特点和当前教学现状后,针对所存在的问题,围绕培养应用创新型人才的目标,从优化教学内容、改进教学方法、完善考核方式、加强实践教学等方面着手... 详细信息

"混凝土结构基本原理"课程是土木工程类专业中非常重要的一门专业基础课,该文在分析其课程特点和当前教学现状后,针对所存在的问题,围绕培养应用创新型人才的目标,从优化教学内容、改进教学方法、完善考核方式、加强实践教学等方面着手,进行深入的研究和探讨,为提高该课程的教学质量和实际效果提供参考。

关键词：应用创新型人才混凝土结构基本原理教学改革课程建设

融资约束下煤炭企业营运资本管理与企业绩效检验

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煤炭经济研究 2020年第5期40卷 63-68页

作者：程爱华续慧泓程冠华山西财经大学实验中心山西太原030006 太原广播电视大学山西太原030024

在资金需求量大、融资压力大的双重压力之下,如何利用营运资本管理提高企业绩效是煤炭企业亟待解决的难题。基于煤炭上市公司的样本数据,使用外部融资成本作为融资约束的分组标准,运用多元回归的方法分析煤炭企业营运资本管理对企业绩... 详细信息

在资金需求量大、融资压力大的双重压力之下,如何利用营运资本管理提高企业绩效是煤炭企业亟待解决的难题。基于煤炭上市公司的样本数据,使用外部融资成本作为融资约束的分组标准,运用多元回归的方法分析煤炭企业营运资本管理对企业绩效的影响,得出煤炭企业营运资本与企业绩效间的关系有不同于其他行业的特征:高融资约束下应收账款周转率与企业绩效成显著正相关,而其他两个则为负相关;低融资约束下各指标则与企业绩效成负相关。

关键词：融资约束营运资本管理企业绩效应收账款煤炭企业

卡维地洛对原发性高血压患者血浆神经肽的影响

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放射免疫学杂志 2008年第5期21卷 388-389页

作者：李倩程光华杨健皖南医学院弋矶山医院急诊内科 241001 弋矶山医院核医学科

目的:为探讨卡维地洛对原发性高血压患者血浆神经肽Y(NPY)与神经降压肽(NT)水平的变化及其与高血压治疗的关系。方法:本文测定了56例原发性高血压患者用药前后血压、血浆NPY、NT的变化,30例健康人做为对照组。结果:原发性高血压组血浆NP... 详细信息

目的:为探讨卡维地洛对原发性高血压患者血浆神经肽Y(NPY)与神经降压肽(NT)水平的变化及其与高血压治疗的关系。方法:本文测定了56例原发性高血压患者用药前后血压、血浆NPY、NT的变化,30例健康人做为对照组。结果:原发性高血压组血浆NPY明显高于对照组(P<0.01);血浆NT低于对照组(P<0.01)。卡维地洛治疗后血压明显下降;血浆NPY水平降低;NT水平升高。结论:卡维地洛对原发性高血压体内NPY、NT水平变化的影响,可能与其治疗作用有关。

关键词：卡维地洛原发性高血压神经肽Y 神经降压肽