西安聚能超导磁体科技有限公司

正西安聚能超导磁体科技有限公司位于西安经济技术开发区凤城二路45号,通过与国际知名超导磁体企业合作,通过引进消化吸收再创新的方式,在中国实现超导磁体生产。目前已具备NbTi和Nb3Sn超导磁体生产能力,形成了一条稳定的超导磁体、低温杜瓦生产线,可提供液氦超导磁体、制冷机直接冷却超导磁体、零挥发超导磁体等各类超导磁体的研发与制造。公司的主要产品涉及工业、科研、医疗、加速器多个领域,主要产品有300mm大尺寸单晶硅用MCZ超导磁体、10T超导储能磁体、污水分离用制冷机直接冷却超导磁体、1.5T全身型MRI超导磁体、1.5T关节     

西安聚能超导磁体科技有限公司

西安聚能超导磁体科技有限公司位于西安经济技术开发区凤城二路45号,通过与国际知名超导磁体企业合作,通过引进消化吸收再创新的方式,在中国实现超导磁体生产。目前已具备NbTi和Nb3Sn超导磁体生产能力,形成了—条稳定的超导磁体、低温杜瓦生产线,可提供液氦超导磁体、制冷机直接冷却超导磁体、零挥发超导磁体等各类超导磁体的研发与制造。公司的主要产品涉及工业、科研、医疗、加速器多个领域,主要产品有300mm大尺寸单晶硅用MCZ超导磁体、10T超导储能磁体、污水分离用制冷机直接冷却超导磁体、1.5T全身型MRI超导磁体、1.5T关节     

新型级联式超导储能变流装置的试验

提出并设计了一种具有级联型Boost拓扑结构的新型超导储能变流装置,用于超导储能系统的能量输出控制,通过一系列试验研究,证明该新型变流装置不仅可以将超导磁体中不断衰减的电流转化为恒定的电压输出,而且可以在现有的低温绝缘技术水平基础上提高磁体的输出电压和释能效率;同时也为超导储能磁体系统在未来的大规模应用积累了很多宝贵的试验数据和经验。     

日本制成15.1T的低温冷却磁体

日本东北大学和三菱重工研究开发了15．1T的低温冷却磁体，这是一个用低温制冷机直接冷却到4．2K的15．1T超导磁体系统，该系统可以代表只用一台低温制冷系统所能获得最大磁场范围．磁体系统的室温空间孔径为52mm，在试车时系统稳定运行24h．在此工作基础上，推动了三菱重工具有高温超导电流引线的5T～10T磁体系统的成功开发和商业销售，预计这个大空间应体系统不久将进入商品化．日本制成15.1T的低温冷却磁体@汪京荣     

西安聚能超导磁体科技有限公司

正西安聚能超导磁体科技有限公司位于西安经济技术开发区凤城二路45号,通过与国际知名超导磁体企业合作,通过引进消化吸收再创新的方式,在中国实现超导磁体生产。目前已具备NbTi和Nb3Sn超导磁体生产能力,形成了一条稳定的超导磁体、低温杜瓦生产线,可提供液氦超导磁体、制冷机直接冷却超导磁体、零挥发超导磁体等各类超导磁体的研发与制造。公司的主要产品涉及工业、科研、医疗、加速器多个领域,主要产品有300mm大尺寸单晶硅用MCZ     

传导冷却无绝缘高温超导二极磁体的研制

本文研制了一台中心磁场为1.5T的传导冷却型的无绝缘高温超导二极磁体,它主要由常温铁芯、高温超导双饼线圈以及低温恒温器等组成。铁芯的极头采用圆柱形结构,极头之间的距离为120mm。其中,每个线圈匝数为176匝,磁体的运行电流为286A。线圈冷体由一台GM制冷机进行冷却,运行温度小于20K。本文主要介绍高温超导磁体的设计以及所使用高温超导带材的载流性能,并对无绝缘线圈在装入铁芯前和装入铁芯后的充电和放电特性进行了测试研究。通过测试得到了该磁体充电延迟时间常数,并且测试结果表明,在励磁电流为286A时,中心磁场强度达到了设计要求。     

基于斜螺线管型超导Gantry二极磁体设计

为了解决当前Gantry治疗装置面临的难题—磁体重量庞大,运行成本昂贵,本文提出了一种新型的斜螺线管型线圈结构。目前,我们已经完成了一台2.5 T用于重离子Gantry的NbTi超导磁体样机设计,与质子Gantry相比,其有效缩减了磁体的尺寸和重量。该磁体由10层斜螺线管线圈组成,工作电流为1000A。线圈孔径为176mm,其中好场区达到孔径的2/3。由于线圈形状的特殊性,其端部结构无需优化,各高阶谐波量沿轴向积分为零。磁体采用传导冷却的方式,保证其在旋转的情况下安全稳定运行。本文从斜螺线管线圈的概念出发,详细介绍斜螺线管型超导二极磁体的磁场设计,借助于ANSYS有限元分析软件,仿真了超导磁体和冷屏的空间温度场,得到磁体低温系统的热分布,最后简要介绍磁体的加工情况。     

散热环境对高温超导带材失超传播速度的影响

对Bi2223/Ag高温超导带材在制冷机环境下的失超传播特性进行测量,主要研究横向散热介质对纵向失超传播速度的影响。在样品带材的两个侧面贴敷不同的散热介质,由热电偶监测样品带在不同传输电流和工作温度时的失超温度轨迹,进而得到超导带材的纵向失超传播速度变化规律。结果表明,超导带材的横向散热环境越好,纵向失超传播速度越慢,通过改善超导体横向散热结构可以大幅提高超导体稳定性。这对超导磁体的饼式线圈设计和高温超导体的稳定性研究有重要意义。     

基于声信号无线远传和声纹识别的制冷机运行及故障监控系统

制冷机在工业企业中的使用极为广泛,为了能及时发现制冷机长期运行过程中因气缸、曲轴磨损及设备松动等引起的运行异常及故障,保证制冷机的长期、稳定运行,研制了一套基于声信号无线远传和声纹识别的制冷机运行及故障监控系统.系统采用通用分组无线业务(GPRS)移动通讯网络,将现场采集到的制冷机运转噪声信号无线远传给上位机,然后在上...     

世界上一个不用低温冷却剂的工业用超导磁体

世界上一个不用低温冷却剂的工业用超导磁体牛津仪器公司（ＯｘｆｏｒＩｎｓｔｒｕｍｅｎｔｓ）Ｂ前宣布，他们已使一个完全不用低温冷却剂的工业用超导磁体系统成功地运行，并且认为这是世界上第一个不用低温冷却剂的工业用超导磁体。该超导磁体系统可在高达６Ｔ的磁场下...     

新型的治疗阿尔茨海默氏症药物(1-二甲基磷酰基-2,2,2-三氯)-乙基-1-醇烟酸醋对体外神经细胞的作用

目的: 观察本实验室合成的一种治疗阿尔茨海默氏症(AD)的药物(1-二甲基磷酰基-2, 2, 2 -三氯)-乙基^-1-醇烟酸醋(NMF),对体外培养的皮层神经细胞活性的影响以及对海人藻酸(KA)所致的神经损伤的保护作用。方法: 采用体外培养皮层神经元的方法,解剖分离 15 d胚胎小鼠皮层神经细胞, 接种于 96孔板,48 h 后加药并培养 72 h,以 MIT 法 观察 NMF 对小鼠皮层神经细胞活性的影响;同时将接种于 24 孔板的细胞预先给予 NMF,d 3 时加或不加KA处理后,以台盼蓝染色鉴别并计数死、活细胞,可得出细胞的存活率。结果: NMF 明显促进胎鼠皮层神经元活性,其中 NMF1、0. 1、10nmol·L^-1促进神经元活性增殖率分别高达 34.7%、37.4%、36. 7%, NMF 明显促进正常胎鼠皮层神经元存活卒,与对照组比较,10nmol·L^-1 NMF 对皮层神经元的存活率分别提高 39.3%、73.5%。 NMF能显著 对抗 KA 所致的神经元损伤,与 KA 损伤组相比, NMF0.1、10、10nmol·L^-1对损伤皮层神经元的保护率分别为 77.30%、80.10%、84.15%。结论: NMF 明 显促进胎鼠皮层神经元的洁性、提高正常皮层神经元,的存活卒,并能有效地保护KA所致的神经元损伤,提示 NMF 是一种很有潜力的治疗 AD 的药物。     

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial confi guration. The fi nal shape of the ferrite is closely related to the misfi t between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.     

Effect of Short-Time Aging on the Pitting Corrosion Behavior of a Novel Lean Duplex Stainless Steel 2002

The effect of short-time aging in the temperature range between 400 and 1000 °C on the pitting corrosion behavior and mechanical property of a novel lean duplex stainless steel(LDSS) 2002 was investigated through the potentiostatic critical pitting temperature(CPT) tests and the Charpy impact tests. Both the pitting corrosion resistance and the toughness of aged specimens degraded due to the precipitation of detrimental secondary phases and the most significant reduction of CPT and impact energy emerged at 650 °C concurrently. The CPT of LDSS 2002 specimen aged at 650 °C decreased by 28 °C, and the impact energy dropped from 69 to 29 J/cm~2 compared with the solution-annealed sample. Transmission electron microscopy characterization showed that the main precipitates in LDSS 2002 were Cr_2N and M_(23)C_6 along the ferrite–austenite grain boundaries.     

Information for Contributors

正The Transactions of Nonferrous Metals Society of China,founded in 1991 and sponsored by The Nonferrous Metals Society of China,is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology,including mineral processing,extraction metallurgy,metallic materials and heat treatments,metal working,physical metallurgy,powder metallurgy,with the emphasis     

Preface

<正>We are pleased to present this Special Issue of Transactions of Nonferrous Metals Society of China containing selected papers from the First Asian Conference on Aluminum Alloys(ACAA-2013),held in Beijing,China,13–17 October 2013.This conference has been initiated,with approval of     

Information for Contributors

The Transactions of Nonferrous Metals Society of China, founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, 1NSPEC, CA, METADEX, AJ and JICST.     

INTRODUCTION TO PATENTS

The invention provides a method of making a mold which can reduce SOx generation rate while preventing decrease in hardening rate in the case of using sulfuric acid for a hardener composition. The method has a mixture step in which fire-resistant particles, a hardener composition and a binder composition are mixed to obtain a composition for a mold. The hardener composition contains sulfuric acid. In the mixture step, sodium carbonate is added. A molar ratio of the sulfuric acid to the sodium carbonate is 0.5 or more and 4.0 or less.     

China Foundry Week 2014

China Foundry Week, hosted by the Foundry Institution of Chinese Mechanical Engineering Society （FICMES） each year, is a large academic event in China. It is one of the ten high-impact activities sponsored by the Chinese Mechanical Engineering Society.     

17th Conference of Hydrodynamic and Electromechanical Control Engineering Call for papers

正1.Contents In order to promote the academic exchanges and technical communication of the research in the field of fluid power transmission and control,fluid control engineering specialized committee of the Chinese Society of Theoretical and Applied Mechanics will hold the 17th Conference of Hydrodynamic and Electromechanical Control Engineering on July 27-29,2014 in Tibet,Lhasa city.     

Formulas of Tension of Continuous Rolling Process

The development of computer controlled continuous rolling process calls for a mathematical expression that can express the inequality condition of "constant flow". Tension is the link of the continuous rolling process. From the condition of dynamic equilibrium, a differential equation of tension is given out. On the basis of the physical rules established from the industrial practice and experimental studies, the law of volume constancy, the linear relation of forward slip and tension, the state equation of continuous rolling, the formula of dynamic tension, and the formula of static tension have been obtained. These formulae reflect the functional relations between tensions, thickness, roll velocity, and time in the continuous rolling process. It is implied that the continuous rolling process is a gradually steady, controllable, and measurable dynamic system. An assumption of predicting the thickness of a steel plate using these tension formulae is also put forward.