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Approaches to improving critical current density of YBCO superconducting thick films deposited by electrophoresis

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Science china(physics,Mechanics & Astronomy) 2004年第2期47卷 165-172页

作者： ZHU Yabin1,2. ZHOU Yueliang2. LIU Zhen2. WANG Shufang2. CHEN Zhenghao2. L?Huibin2. YANG Guozhen2. XIAO Ling3, REN Hongtao3, JIAO Yulei3 & ZHENG Minghui3 1. Department of physics, College of Science, Beijing Jiaotong University, Beijing 100044, {2. 2. Laboratory of Optical physics, Institute of physics and Center for Condensed Matter physics, Chinese Academy of Sciences, Beijing 100080, {2. 3. General Research Institute for Nonferrous Metals, Beijing 100088, {2. Correspondence should be addressed to Zhu Yabin (email: ybzhu@***) 1. Department of physics College of Science Beijing Jiaotong University 100044 Beijing China 2. Laboratory of Optical physics Institute of physics and Center for Condensed Matter physics Chinese Academy of Sciences 100080 Beijing China 3. General Research Institute for Nonferrous Metals 100088 Beijing China

Fabrication of YBCO superconducting thick films by electrophoresis has been widely reported. However, the value of critical current density (J c) is far from what the practical application requires. The superconducting thick films are obtained using top-seeded melt growth method with different proportional Y2.aCuO5 (Y2.1) addition. High-pressure oxygen has been used in the annealing process to improve the uniformity of the oxygen content in the superconducting thick films. When 40mol% Y2.1 powder is added to the YBa2.u3O7–5 (Y12.) powder,J c for the superconducting thick film by approaches described above reaches 7.008×103 A/cm2.(77 K, 0 T), which is greater than the value ever reported.

关键词： YBCO thick films, electrophoretic deposition, melt-textured.

Electronic Structure of Doped Trans-Polyacetylene

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Wuhan University Journal of Natural Sciences 2002年第1期7卷 51-53页

作者： Ren Da-zhi 1,2. Zhuang Wei 2. Wang Jun 2.1. Wuhan University Journals Press,Wuhan 430072.Hubei,china 2. School of physics and Technology, Wuhan University, Wuhan 430072.Hubei,china Wuhan University Journals Press Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) Wuhan University School of Physics and Technology Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) Wuhan University School of Physics and Technology Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***)

The behavior of electronic structures of doped trans-polyacetylene is revealed by a simple method. (C2.H2.)+n is used to simulate p-type doped trans-polyacetylene at various doping concentrations. The electronic structure is calculated, by CNDO/2.method. These calculations show that at low doping level, the decrease of electronic energy compensates the increase of elastic energy, thus the bond alternation exists, and the charge carriers are solitons. When doping level is high, the increase of elastic energy is larger than the decrease, of electronic energy, the bond alternation disappears, solitons no longer exist, and polyacetylene is in a metalic state.

关键词： trans polyacetylene CNDO/2 electronic structure doped

Discovery of seismites in Upper Sinian stratiform lead-zinc deposits in Dadu River valley, Sichuan, china: Implication for ore genesis

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Science china Earth Sciences 2006年第11期49卷 1135-1146页

作者： LIN Fangcheng1,2.& PAN Guitang2.1. Geoscience College, Chengdu University of Technology, Chengdu 610059, china 2. Chengdu Institute of Geology and Mineral Resources, Chengdu 610082. china 1. Geoscience College Chengdu University of Technology Chengdu 610059 China 2. Chengdu Institute of Geology and Mineral Resources Chengdu 610082 China

A number of lead-zinc sulphide deposits have been discovered in recent years in dolo- mitic rocks of the Upper Sinian Dengying Formation in the Dadu River valley region, Sichuan Province, china. The lead-zinc mineralization is closely associated with a black siliceous exhalite that has been traced over 50 km of strike. This makes Dadu River valley the most extensive stratiform non-ferrous sulphide horizon having been discovered to date in china. In a previous study by the first author (LIN), these deposits were recognised as belonging to the broad spectrum of lead-zinc sedimentary exhala- tive (SEDEX) deposits. In this paper, seismites and seismogenetic structures occurring in close association with the Dadu River valley mineralized zone are described. The close spatial and temporal relationship between the seismites and mineralization provides strong evidence for the hypothesis that the lead-zinc SEDEX deposits formed in direct response to earthquake activities around the Sinian-Cambrian boundary. The earthquakes are postulated to be an effective dynamic mechanism for triggering the upward migration of deep circulating ore fluids along synsedimentary growth faults and their exhalation onto the sea-floor to form the extensive deposits of stratiform lead-zinc sulphide ore.

关键词： seismites, earthquake, lead-zinc deposit, hydrothermal exhalation, Upper Sinian Dengying Age.

HL-2.托卡马克上blob结构的喷气成像观测和定量研究

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核聚变与等离子体物理 2024年

作者：袁金榜袁博达许敏余羿聂林 HL-2.实验团队核工业西南物理研究院中山大学

在HL-2.装置上发展了一套用于边界和刮削层(SOL)中等离子体涨落测量的喷气成像诊断(GPI)系统，该诊断测量范围在弱场侧中平面附近，测量范围大小为160mm×160mm，极向-径向的空间分辨能力为2.5mm×2.5mm，时间分辨能力3～10μs。通过与... 详细信息

在HL-2.装置上发展了一套用于边界和刮削层(SOL)中等离子体涨落测量的喷气成像诊断(GPI)系统，该诊断测量范围在弱场侧中平面附近，测量范围大小为160mm×160mm，极向-径向的空间分辨能力为2.5mm×2.5mm，时间分辨能力3～10μs。通过与朗缪尔探针数据的对比，验证了GPI诊断可以得到高时空分辨率的等离子体密度扰动数据。在此基础上，发展了分析GPI实验数据的椭圆拟合算法，从而定量研究丝状结构(blob)运动，分别计算得到了blob位置、空间尺度(包括极向、径向特征长度)及运动速度等关键参数，blob空间尺度的演化验证了极向剪切流对大尺度湍流结构的拉伸及剪切分裂作用，且观察到极向运动由边界径向电场驱动的Er×B极向流主导。而blob径向速度向外，符合blob内部极向方向的电荷分离驱动了blob径向运动的分析。结果验证了椭圆拟合算法在GPI数据分析中的重要应用，为将来研究blob的演化过程提供了重要的测量分析方法和实验基础。

关键词：喷气成像诊断系统大尺度相干结构blob 椭圆拟合

“三HUA雷锋”进社区 “伙伴计划”展风采

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中国共青团 2024年第10期 36-37页

作者： 1.团沈阳市委 2.沈阳市一滴水公益服务中心团沈阳市委沈阳市一滴水公益服务中心

2.2.年3月4日,在沈阳市铁西区红梅社区的“青年之家”,刚刚结束了一堂形式新颖的沉浸式宣讲课。“在社区里就能通过视频‘云游’雷锋班,听雷锋班班长给我们讲‘老三宝’和‘新三宝’的故事。我一定要努力学习,长大后像雷锋叔叔那样,做... 详细信息

2.2.年3月4日,在沈阳市铁西区红梅社区的“青年之家”,刚刚结束了一堂形式新颖的沉浸式宣讲课。“在社区里就能通过视频‘云游’雷锋班,听雷锋班班长给我们讲‘老三宝’和‘新三宝’的故事。我一定要努力学习,长大后像雷锋叔叔那样,做一个对国家、对社会、对家乡有用的人!”家住红梅社区的小学二年级学生张恩睿诚挚地说。

关键词：雷锋叔叔沈阳市铁西区沉浸式雷锋班青年之家伙伴计划小学二年级形式新颖

The GPS-gravimetry boundary value problem

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Science china Earth Sciences 2005年第3期48卷 398-405页

作者： YU Jinhai1,2.& ZHANG Chuanding2.1. Institute of Geodesy and Geophysics of Chinese Academy of Sciences, Wuhan 430077, china 2. Zhengzhou Information Engineering University, Zhengzhou 450052. china 1. Institute of Geodesy and Geophysics of Chinese Academy of Sciences 430077 Wuhan China 2. Zhengzhou Information Engineering University 450052 Zhengzhou China

How to determine the earth’s external gravity field with the accuracy of O(T2. by making use of GPS data and gravity values measured on the earth’s surface is dealt with in this paper. There are two main steps: to extend these measured values on the earth’s surface onto the reference ellipsoid at first and then to seek for the integral solution of the external Neumann problem outside the ellipsoid. In addition, the corresponding judging criteria of accuracy to solve the GPS-gravity boundary value problem are established. The integral solution given in the paper not only contains all frequency-spectral information of the gravity field with the accuracy of O(T 2., but is also easily computed. In fact, the solution has great significance for both theory and prac- tice.

关键词： Neumann boundary value problem, integral solution, gravity disturbance.

自治区教育厅自治区财政厅关于印发《广西支持普通高中发展专项补助资金管理办法》等4个资金管理办法的通知(桂教规范〔2.2.〕10号)

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广西壮族自治区人民政府公报 2024年第4期 20-31页

作者： 1.广西壮族自治区教育厅 2.广西壮族自治区财政厅广西壮族自治区教育厅广西壮族自治区财政厅

各市、县(市、区)财政局、教育局,区直各有关单位:为规范和加强我区普通高中发展专项补助资金、学前教育发展专项资金、特殊教育补助资金和中小学幼儿园教师培训计划专项资金的管理,提高资金使用效益,根据财政部、教育部的相关规定,结... 详细信息

各市、县(市、区)财政局、教育局,区直各有关单位:为规范和加强我区普通高中发展专项补助资金、学前教育发展专项资金、特殊教育补助资金和中小学幼儿园教师培训计划专项资金的管理,提高资金使用效益,根据财政部、教育部的相关规定,结合我区实际,自治区教育厅、财政厅制定了《广西支持普通高中发展专项补助资金管理办法》《广西学前教育发展专项资金管理办法》《广西特殊教育补助资金管理办法》和《广西中小学幼儿园教师培训计划专项资金管理办法》,现印发给你们.

关键词：专项补助资金专项资金管理特殊教育学前教育发展普通高中资金使用效益

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烃类热裂解和催化裂解技术的研究进展

石油学报(石油加工) 2024年

作者：田畅畅马振洲尹丽侯旭 1.长春工业大学化学工程学院 2.长春工业大学材料科学高等研究院长春工业大学化学工程学院长春工业大学材料科学高等研究院

烃类热裂解和催化裂解技术的发展，有助于提高石油资源的利用率，满足日益增长的石油化工产品需求。介绍了烃类裂解技术的研究现状，总结了热裂解和催化裂解的技术特点。阐述了烃类热裂解反应机理、烃类热裂解过程模拟、金属氧化物和分... 详细信息

烃类热裂解和催化裂解技术的发展，有助于提高石油资源的利用率，满足日益增长的石油化工产品需求。介绍了烃类裂解技术的研究现状，总结了热裂解和催化裂解的技术特点。阐述了烃类热裂解反应机理、烃类热裂解过程模拟、金属氧化物和分子筛催化剂特性、以及烃类催化裂解过程模拟等研究进展。重点分析了烃分子结构与热裂解反应的构效关系、分子筛催化剂与烃类催化裂解的构效关系。归纳总结了石油烃热裂解、催化裂解技术的核心问题及未来研究方向，为改善烃类热裂解、催化裂解制石油化工产品工艺提供理论基础。

关键词：烃类热裂解催化裂解反应机理过程模拟

关于批准发布《钢铁及合金硅含量的测定重量法》等353项国家标准和4项国家标准修改单的公告

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中国标准化 2024年第11期 278-290页

作者： 1.国家市场监督管理总局 2.国家标准化管理委员会国家市场监督管理总局国家标准化管理委员会

国家市场监督管理总局（国家标准化管理委员会）批准《钢铁及合金硅含量的测定重量法》等353项国家标准和4项国家标准修改单，现予以公告。

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