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Epitaxial Bi_(2)Sr_(2)CuO_(y) thin films as p-type transparent conductors

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Chinese Physics B 2022年第10期31卷 514-519页

作者： Chen Zhou wang-ping cheng Yuan-Di He cheng Shao Ling Hu Ren-Huai Wei Jing-Gang Qin Wen-Hai Song Xue-Bin Zhu Chuan-Bing Cai Yu-ping Sun Key Laboratory of Materials Physics Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Institute of Plasma Physics Chinese Academy of SciencesHFIPSChinese Academy of SciencesHefei 230031China Physics Department Shanghai Key Laboratory of High Temperature SuperconductorsShanghai UniversityShanghai 200444China High Magnetic Field Laboratory HFIPSChinese Academy of SciencesHefei 230031China Collaborative Innovation Centre of Advanced Microstructures Nanjing UniversityNanjing 210093China

Development of p-type transparent conducting thin films is tireless due to the trade-off issue between optical transparency and conductivity. The rarely concerned low normal state resistance makes Bi-based superconducting cuprates the potential hole-type transparent conductors, which have been realized in Bi_(2)Sr_(2)CaCu_(2)O_(y) thin films. In this study, epitaxial superconducting Bi_(2)Sr_(2)CuO_(y) and Bi_(2)Sr_(1.8)Nd_(0.2)CuO_(y) thin films with superior normal state conductivity are proposed as ptype transparent conductors. It is found that the Bi_(2)Sr_(1.8)Nd_(0.2)CuO_(y) thin film with thickness 15 nm shows an average visible transmittance of 65% and room-temperature sheet resistance of 650 Ω/sq. The results further demonstrate that Bi-based cuprate superconductors can be regarded as potential p-type transparent conductors for future optoelectronic applications.

关键词： p-type transparent conductor sol-gel Bi-2201

Impact of preparation conditions on hydrogen storage performance of metallic Ti-doped NaAlH4

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Rare Metals 2006年第S1期 266-272页

作者： KANG Xiangdong, wang ping, and cheng HuimingShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

关键词： hydrogen storage materials NaAlH4 metallic Ti precursor

Wheel wear comparison between motor car and trailer of intercity train

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Journal of Central South University 2021年第6期28卷 1737-1746页

作者： KOU Jie ZHANG Ji-min ZHOU He-chao wang cheng-ping SUN Li-xia Institute of Rail Transit Tongji UniversityShanghai 201804China Railway Science Technology Research and Development Center China Academy of Railway Science Cooperation LimitedBeijing 100081China

To analyze wheel wear discrepancy between motor car and trailer of an intercity train,a novel wheel wear rates calculation model was proposed,which was composed of the intercity train dynamics model,wheel-rail three-dimensional rolling contact FEM model and the wear *** simulated results were contrasted with measured results in field *** simulated results showed the motor car wheels had larger rotation rate and longitudinal creepage than the trailer ***,the motor car wheels encountered larger vertical forces and longitudinal forces from bogie because of the heavier car body and the impact of traction *** traction torque acting on motor car wheel could increase the slip rates in the rear part of wheel contact patch and weaken the spinning phenomenon of relative *** contact pressure and slip rates caused the higher wear rates of motor car wheel than those of trailer *** overall trends of wheel wear depth in simulated and tested results were *** they both showed the motor car wheel encountered the more serious wear than the trailer *** models can be used to study the effect of the traction characteristics curves on the wear of wheel.

关键词： wheel wear intercity train motor car and trailer finite element method(FEM) field test

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计算机彝文自动分词技术的设计研究

湘潭大学自然科学学报 2012年第3期34卷 107-113页

作者：王成平西南民族大学民族语言文字信息处理实验中心四川成都610041

实现彝语文自动分词是计算机彝文信息处理中一项不可缺少的基础性工作,计算机彝文信息处理只要涉及到信息检索、机器翻译、语法分析、语义分析等方面的应用,就都需要以词为基本的处理单位.论文以彝语言的特点作为出发点,首先提出了计算... 详细信息

实现彝语文自动分词是计算机彝文信息处理中一项不可缺少的基础性工作,计算机彝文信息处理只要涉及到信息检索、机器翻译、语法分析、语义分析等方面的应用,就都需要以词为基本的处理单位.论文以彝语言的特点作为出发点,首先提出了计算机彝文分词规则与分词词表的设计思路,其次提出了实现计算机彝文自动分词技术的算法基础、系统结构,以及实现流程,而且进行了抽样测试,其分词的速度和准确率都比较高.论文最后根据彝语言的特点对实现计算机彝文自动分词的难点进行了分析.

关键词：彝语文自动分词算法测试评价难点分析

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基于既定词表的彝文自动分词技术研究

科学技术与工程 2012年第10期12卷 2328-2332页

作者：王成平金骋西南民族大学民族语言文字信息处理实验中心

自动分词是彝文信息处理中一项不可缺少的基础性工作,彝文信息处理只要涉及到检索、翻译、校对等,就需要以词为基本单位。根据彝文的特点,介绍了彝文分词规范与分词词表的设计,提出了实现基于既定词表的彝文自动分词技术的算法选择、系... 详细信息

自动分词是彝文信息处理中一项不可缺少的基础性工作,彝文信息处理只要涉及到检索、翻译、校对等,就需要以词为基本单位。根据彝文的特点,介绍了彝文分词规范与分词词表的设计,提出了实现基于既定词表的彝文自动分词技术的算法选择、系统结构,以及实现流程;而且进行了抽样测试,其分词准确率和速度都比较令人满意。最后结合彝文的特点对实现彝文自动分词的难点进行了分析。

关键词：彝文自动分词算法测试评价难点分析

Power Network Parameter Estimation Method Based on Data Mining Technology

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Journal of Shanghai Jiaotong university(Science) 2008年第4期13卷 468-472页

作者：张启平王承民侯志俭 Department of Electrical Engineering Shanghai Jiaotong University

The parameter values which actually change with the circumstances, weather and load level etc. produce great effect to the result of state estimation. A new parameter estimation method based on data mining technology was proposed. The clustering method was used to classify the historical data in supervisory control and data acquisition （SCADA） database as several types. The data processing technology was implied to treat the isolated point, missing data and yawp data in samples for classified groups. The measurement data which belong to each classification were introduced to the linear regression equation in order to gain the regression coefficient and actual parameters by the least square method. A practical system demonstrates the high correctness, reliability and strong practicability of the proposed method.

关键词： parameter estimation data processing data mining clustering analysis linear regression

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城市交通审美文化传播的理性分析

北京交通大学学报（社会科学版） 2023年第2期22卷 73-79页

作者：庞跃辉王成平重庆交通大学交通文化研究中心重庆400074 重庆交通大学马克思主义学院重庆400074 重庆交通大学旅游与传媒学院重庆400074

城市交通审美文化是城市文化系统的重要组成部分,既具有一般审美文化的属性和价值,也具有其特质和功能。在人们对城市生产和生活质量新需求的背景下,不仅应当更加重视城市交通的安全、便捷效能,而且应当高度重视城市交通的审美文化功能... 详细信息

城市交通审美文化是城市文化系统的重要组成部分,既具有一般审美文化的属性和价值,也具有其特质和功能。在人们对城市生产和生活质量新需求的背景下,不仅应当更加重视城市交通的安全、便捷效能,而且应当高度重视城市交通的审美文化功能。因此,在深度认知城市交通审美文化传播的丰厚内涵及重要表征的基础上,把握城市交通审美文化传播的生成机理与技术方法,构造有内涵、有品位、有特色的城市交通文化传播景观,不仅是建构城市文化传播新体系的必然选择,而且是突破“千城一面”城市模式的有效之策。

关键词：城市文化城市交通审美文化传播机理传播进路

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磨耗状态下城际动车组轮轨曲线磨耗特性

交通运输工程学报 2021年第3期21卷 279-288页

作者：寇杰张济民周和超王承萍同济大学铁道与城市轨道交通研究院上海201804 中国空气动力研究与发展中心四川绵阳621000

以CRH6A城际动车组为研究对象,基于实测磨耗后轮轨型面,利用多体动力学软件Universal Mechanism建立了车辆动力学模型,计算了通过曲线时的轮轨力与轮对位置参数;在非线性有限元软件ABAQUS中,基于任意拉格朗日欧拉方法建立了轮轨三维滚... 详细信息

以CRH6A城际动车组为研究对象,基于实测磨耗后轮轨型面,利用多体动力学软件Universal Mechanism建立了车辆动力学模型,计算了通过曲线时的轮轨力与轮对位置参数;在非线性有限元软件ABAQUS中,基于任意拉格朗日欧拉方法建立了轮轨三维滚动接触模型,计算了轮轨接触应力特性和滑移特性;基于Archard磨损模型,提出一种车轮表面接触区域磨损速率快速计算方法,研究了新轮、磨耗初期车轮和磨耗到限车轮与新轨、磨耗后钢轨相互作用下,车轮通过曲线时接触区域磨损特性。研究结果表明:新轮和磨耗后钢轨、磨耗初期车轮和新轨、磨耗到限车轮与新轨相互作用下最大法向接触应力分别达到了2017、1803和1668 MPa,比新轮和新轨、磨耗初期车轮和磨耗后钢轨、磨耗到限车轮和磨耗后钢轨3种作用下最大接触应力高出20%以上;新轮和磨耗后钢轨、磨耗初期车轮与新轨、磨耗初期车轮和磨耗后钢轨相互作用下,轮轨间出现两点接触、三点接触,甚至四点接触;在多点接触下,轮缘处接触点表现出应力集中且磨损速率较高的特点,最大磨损速率分别达到2.60×10^(-5)、3.82×10^(-5)、3.52×10^(-5) mm·s^(-1),远高于新轮和新轨、磨耗到限车轮和新轨、磨耗到限车轮和旧轨3种作用下的磨损速率;磨耗到限车轮和新轨与磨耗钢轨相互作用下的磨损速率均相对较小,说明在磨耗后期的车轮磨耗相对较小;轨角磨耗会严重加剧新轮的轮缘磨耗,且磨耗初期车轮具有较高的轮缘磨损速率,应将车轮镟修周期和钢轨打磨周期相协调,并通过涂油等方式降低磨耗初期的轮缘磨损。

关键词：轨道交通磨耗型面轮轨接触特性有限元分析三维滚动接触磨耗速率

Human-induced pluripotent stem cell-derived neural stem cell exosomes improve blood-brain barrier function after intracerebral hemorrhage by activating astrocytes via PI3K/AKT/MCP-1 axis

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Neural Regeneration Research 2025年第2期20卷 518-532页

作者： Conglin wang Fangyuan cheng Zhaoli Han Bo Yan Pan Liao Zhenyu Yin Xintong Ge Dai Li Rongrong Zhong Qiang Liu Fanglian Chen ping Lei Department of Geriatrics Tianjin Medical University General HospitalTianjinChina School of Medicine Nankai UniversityTianjinChina Tianjin Neurological Institute TianjinChina

Cerebral edema caused by blood-brain barrier injury after intracerebral hemorrhage is an important factor leading to poor ***-induced pluripotent stem cell-derived neural stem cell exosomes(hiPSC-NSC-Exos)have shown potential for brain injury repair in central nervous system *** this study,we explored the impact of hiPSC-NSC-Exos on blood-brain barrier preservation and the underlying *** results indicated that intranasal delivery of hiPSC-NSC-Exos mitigated neurological deficits,enhanced blood-brain barrier integrity,and reduced leukocyte infiltration in a mouse model of intracerebral ***,hiPSC-NSC-Exos decreased immune cell infiltration,activated astrocytes,and decreased the secretion of inflammatory cytokines like monocyte chemoattractant protein-1,macrophage inflammatory protein-1α,and tumor necrosis factor-αpost-intracerebral hemorrhage,thereby improving the inflammatory *** sequencing indicated that hiPSC-NSC-Exo activated the PI3K/AKT signaling pathway in astrocytes and decreased monocyte chemoattractant protein-1 secretion,thereby improving blood-brain barrier *** with the PI3K/AKT inhibitor LY294002 or the monocyte chemoattractant protein-1 neutralizing agent C1142 abolished these *** summary,our findings suggest that hiPSC-NSC-Exos maintains blood-brain barrier integrity,in part by downregulating monocyte chemoattractant protein-1 secretion through activation of the PI3K/AKT signaling pathway in astrocytes.

关键词： AKT astrocyte blood-brain barrier cerebral edema exosomes human-induced pluripotent stem cells intracerebral hemorrhage neural stem cells neuroinflammation PI3K