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哈佛大学科学家的大气地球工程实验计划
热度 4 spins 2017-3-31 15:11
地球工程 ： 温室效应已成为各国政府刻不容缓需要处理的问题。有著名科学家建议，各国应该积极研究用一些早前被唾弃的“怪招”，对付温室效应。科学家正 考虑实施一些巨大工程缓解全球变暖 ，这些所谓的“地球工程”包括：发 射反光板到太空挡走阳光、造云阻挡阳光、人工制造巨型“树木”，用以过滤二氧化碳、人造“火山”向空中释放硫化物用以反射阳光等 ，但不论环保界和主流科学界都认为，当前急务是防止出现温室效应及减少温室气体排放，对这些地球工程学，大规模改变地球环境以适应人类的研究的怪招都嗤之以鼻。但 部分世界顶尖的科学家最近指出，这些建议其实有值得研究的价值，呼吁各国领袖及科学组织研究这些方法的可行性，以备万一地球真的需要紧急降温时能够采用（ 以上内容来自百度百科 ） 。 哈佛大学教授David Keith 近日，两位哈佛大学气象学家正在为小型的大气实验做准备，该实验可以通过探究改变气候的可行性和风险来缓解全球变暖的问题。 他们将是官方记录最早的可控实验室或计算机模型之外的的地球工程相关实验之一。 哈佛大学的David Keith教授和Frank Keutsch教授希望能够在明年的某个时间， 在亚利桑那州图森市的试验场发放一只吊舱上配备推进器和传感器的高空气球。（原文如此，高空气球还有必要配推进器？） 在 工程测试 开始后，“StratoCruiser”（平流层巡航者）会向平流层喷洒一些细雾状材料，例如二氧化碳、氧化铝和碳酸钙等。然后气球吊舱上的传感器会测量粒子的反射率，它们在什么样的温度下会分散或结合，它们与大气层中其他化合物的作用方式。 这些研究人员第一次提出这些气球实验是在2014年发表的名为“Stratospheric controlledperturbation experiment: a small-scale experiment to improve understanding ofthe risks of solar geoengineering”的文章上。在周五华盛顿特区开的地理工程学学术会议上，Keith说他们已经与亚利桑那州的 World View Enterprises 测试气球公司展开工程设计工作。他们也开始讨论了关于此类实验合适的管理结构，并且计划建立一个独立的机构来评审他们的方案。 world view公司的载人气球概念图 world view公司的 STRATOLLITE FLIGHT 气球搭载服务平台 “我们将在明年进行首次飞行实验”。他在the Carnegie Endowment for International Peace（卡内基国际和平基金）举办的the Forum U.S. Solar Geoengineering Research（美国太阳能地球工程学研讨会）上说。 在之前MIT Technology Review（麻省理工技术评论）的采访中Keith强调，地球工程学本身不是非黑即白的二元实验。但是它们应该可以为他仔细研究过的实验方法提供有价值的信息，正如太阳能辐射管理实验那样。 此次实验的基本理念是向平流层喷洒某些类型的微小颗粒可以帮助更多的热量反射回空间。科学家们相信这种方法一定会起到作用，因为在大自然中这已经做到了。过去的火山大爆发造成成千上万吨的二氧化硫排向天空中，这让之后几个月中的全球气温有所降低。 而还不清楚的恰恰是这种技术怎样控制了全球范围内的温度，什么物质能够达到最好的效果，和这对环境产生的副作用是什么。特别值得注意的是，在世界上部分地区，过去的火山爆发也会降低降水水平，而且众所周知地，二氧化硫会耗尽臭氧层对地球的保护。 Keith已经利用计算机模型精准地探讨了包括冰晶和氧化铝在内的其他物质对臭氧层只造成中性影响的可能性。去年年底，Keutsch和其他研究人员发表了一篇论文“Stratospheric solargeoengineering without ozone loss”，文中提出发现利用方解石可以使全球气温降低并且可以修复臭氧层，方解石是一种有碳酸钙组成的矿物质。 气球实验还可以帮助进一步了解在实际环境中这些化学物质究竟是怎样与臭氧进行前期反应的，实验提供的额外信息还可以帮助他们加深对太阳能地理工程学的理解，他说：“你必须在实际的环境中测量探究事物因为大自然总会给你惊喜。” 这会是科学家们自此开始在户外进行地球工程学相关试验的时机吗？ Keith 强调说要想判断一些地球工程技术是否要被部署还为时尚早。但是他已经发声多年，表示研究应该向前推进以更好地了解它们的容限及危险性，因为他们可能大幅度地减少气候变化地风险。他表示该实验对环境地影响微不足道，因为他们将使用不超过一公斤的 实验材料。 初步实验的经费来自于哈佛大学对Keith和Keutsch作为新晋教授提供的助研金。更多的研究经费可能来自哈佛大学的Solar Geoengineering Research Program（太阳能地球工程学研究项目），这个涉及多学科的项目是今年春天启动的，围绕地球工程学主要研究环境治理可行性、风险、伦理、及治理方案。截至发稿，该项目已经从微软合作创始人Bill Gates、the Hewlett Foundation（休利特基金会）、the Alfred P. Sloan Foundation（阿尔弗雷德P.斯隆基金会）、Harvard-internal funds（哈佛内部基金）及其他慈善家处筹集了超过7百万美元。 地球工程学评论家反对其观点，认为气候系统过于复杂尽量不要干预，这样做环境风险太高，不如探讨“修复”技术以降低减少温室气体排放的压力。 到目前位置，只有两个已知的在户外进行的地球工程实验：2011年的E-PEACE实验，加州大学的研究人员们在San Diego沿海岸喷洒盐颗粒，2009年俄罗斯科学家们从直升机和汽车上散布硫酸盐颗粒。英国所谓的SPICE实验在2012年很快地停止取消了，在一些参与的科学家申请了相关专利后紧跟着来的就是公众的批评及利益冲突的指控。 以前的一次采访中，前Lawrence Livermore National Laboratory（劳伦斯利弗莫尔国家实验室）副董事Jane Long强调，推进地球工程学实验的科研工作者们需要竭尽全力确保适当的公共通知，合理的监督，尤其当他们是基于私人基金会开展工作时。但是她也表示，鉴于日益增长的气候变化的危险，现在是时候要认真研究相关的科技潜力 了。 “我们应该在十年前开始的，”她说“要知道最重要的是，在我们能够开展相关研究的时候要竭尽全力。” 浮空君说： 看来地球工程目前确实存在一些争议，但就像地震预报研究一样，虽然至今都没有令人满意的成果，但科学家们的研究努力从未停止。只要是对人类有益的，研究就是有价值的。 关注我们，关注最轻浮的飞行器。 浮空飞行器
个人分类: 浮空器|7448 次阅读|9 个评论
国家艺术基金：国有、民营、机构、个人均可以申报
lulingkxw 2016-2-11 10:44
成立只有两年的国家艺术基金，每一年都向社会征集支持力度不同的各类项目，给人们展示了作为一个大国艺术基金的开放和包容。尽管，本人还不太了解其实际执行的具体情况，仅从其申报资格的开放度不受单位体制约束，国有、民营都可以申报；不仅欢迎机构，也尊重个人独立申报，就凭这一点，就让人受到极大的鼓舞，激发出参与的冲动和力量。艺术学是科学的重要组成，它是科学的先锋学科。 我期待也相信国家科学基金将来也会这么做的。 那一天，我国科技“万众创新”的时代可就真的到来了！ 附： 国家艺术基金网： http://59.252.212.18/art/2014/1/3/art_181_2904.html 国家艺术基金正式成立 !--$ end-- 发布日期：2014-01-03    ​ !--$ begin-- 　　中国文化报记者卢毅然、王立元报道：为适应我国文化体制改革的新形势，借鉴部分发达国家通过设立基金的方式对艺术创作进行资助以及我国自然科学、社会科学和出版等领域基金制管理的成功经验，经过深入调查、研究和论证，文化部、财政部提出以财政拨款为主，吸引和带动社会资金投入的方式设立国家艺术基金。12月30日，文化部在北京召开国家艺术基金成立座谈会，介绍国家艺术基金成立有关情况。文化部部长、国家艺术基金理事会理事长蔡武，中央机构编制委员会办公室副主任张崇和，全国人大常委、外事委员会副主任委员、国家艺术基金理事会副理事长兼秘书长赵少华，文化部副部长、国家艺术基金理事会副理事长董伟，财政部部长助理、国家艺术基金理事会副理事长余蔚平等出席座谈会。座谈会由文化部副部长杨志今主持。 　　国家艺术基金为公益性基金，资金主要来自中央财政拨款，同时依法接受自然人、法人或其他组织的捐赠。国家艺术基金重点围绕创作生产、宣传推广、征集收藏和人才培养四大方向进行资助，其中艺术创作是基金支持的重点。国家艺术基金在组织管理上设立了理事会、管理中心、专家委员会。与人文领域其他类型的基金相比，艺术基金具有多样性、开放性、广泛性、复杂性的特点。 和其他同类政府基金相比，艺术基金打破了体制、系统、行业和地域的局限，具有开放性和广泛性的特点，面向全社会，国有、民营、机构和个人都可以申报。 　　蔡武在座谈会上宣读了12月18日国务院副总理刘延东在“文化部关于成立国家艺术基金有关工作的请示”上作出的重要批示。 　　蔡武表示，国家艺术基金的成立有着深远的历史意义和重要的现实意义。首先，是贯彻落实十八届三中全会精神，“推进国家治理体系和治理能力现代化”的具体举措。国家艺术基金的成立，体现文化部门转变职能、创新艺术创作生产引导方式，推进我国艺术治理“管”“办”分离、激发全社会文化创造力。其次，是我国艺术资助评审体制转型的里程碑。国家艺术基金的成立形成了国家设立、政府主导、专家评审、面向社会的公益性基金模式。在资金来源上，它既发挥国家财政资金的主导作用，又充分调动社会力量的积极性；在申报和资助范围上，打破了行业、系统、体制和地域的限制，搭建了一个面向全社会的开放平等的平台；在评审主体上，它改变了主要由行政权力决策的格局，确立了各类专业、专家评估的重要作用，使评审更加科学合理；在运行机制上，实行决策、协调、执行、监督适当分设，实行公开公正公平的程序和操作，充分尊重广大公众的知情权、参与权，提升了管理部门的权威性和公信力。第三，国家艺术基金的成立，是完善文化投入模式的新探索。国家艺术基金改变了以往财政投入直接“养人”的模式，通过间接赞助、专家评审、社会监督、绩效考评等手段，充分发挥了财政资金的导向作用，保证资金投入和资金使用的公开、公平、公正、透明，也有利于督促被资助者努力提高资金使用效率。 　　蔡武提出，国家艺术基金的实施和发展，要着力做好以下几个方面工作：第一，充分发挥引领和示范作用，推出更多优秀作品和人才；第二，发挥孵化助推作用，让一切艺术创造的活力源泉充分涌流；第三，要密切沟通协作，加强顶层设计，切实提高管理的科学化水平。 　　余蔚平代表财政部对基金的成立表示热烈的祝贺。他表示，设立国家艺术基金是转变财政投入方式的重要举措。加快构建适合文化发展规律和特点的公共财政保障机制，是推动我国社会主义文化繁荣发展的重要保障。以财政直接资助和政府部门管理文化经费为基本特点的传统管理模式存在着文化投入分散、缺位和越位并存、资金管理链条长、使用效益不高等诸多问题。与市场经济条件下文化改革和需求相呼应，国家对于文化资助的方式应当逐步由传统的财政直接资助向多元化混合资助方向发展，改变目前政府办文化、直接定项目、财政资金只能在文化体制内分配使用的单一模式。他提出要充分发挥国家艺术基金在繁荣文化创作中的重要作用，并要以改革创新的精神推进国家艺术基金工作。 　　国家艺术基金理事会理事、北京市文联主席、北京人民艺术剧院院长张和平表示，成立国家艺术基金是一件大好事，正当其时，要以改革创新的思路、办法管好用好艺术基金，真正起到引领、示范的作用。 　　国家艺术基金理事会理事、基金管理中心主任韩子勇从管理中心工作的角度，表示要努力学习、提高本领、熟悉基金管理的规律和特点，提高执行能力与工作质量。 　　话剧导演查明哲代表中青年艺术家发言。他表示，国家艺术基金的成立，显示了国家和文化部门对全国文艺发展的科学管理和宏观调控的新思路、新举措，它将为文化艺术的发展提供强大的支撑。 　　地方文化厅局代表、福建省文化厅厅长陈秋平表示，国家艺术基金的成立，有利于实现政府扶持艺术工作的规范化和专业化、创新文化投入的模式、提高财政资金使用的效益、调动全社会力量扶持和参与艺术生产，改进文艺评审和资助的机制，提高社会公众的参与度和关注度，提升政府管理部门的公信力和权威性。 !--$ end-- ​
710 次阅读|0 个评论
曾荣昌发表论文目录（Rong-Chang Zeng\'s Publications）(2000-)
rczeng 2015-4-16 16:33
曾荣昌发表论文目录 （Rong-Chang Zeng's Publications）(2000-) 2019 / Fundamental Theory of Biodegradable Metals—Definition, Criteria, and Design . Yang Liu, Yufeng Zheng,* Xie-Hui Chen, Jian-An Yang,* Haobo Pan, Dafu Chen, Luning Wang, Jialiang Zhang, Donghui Zhu, Shuilin Wu, Kelvin Wai Kwok Yeung, Rong-Chang Zeng , Yong Han, and Shaokang Guan*. Advanced Functional Materials (IF 13.325 ). 2019, 1805402. https://doi.org/10.1002/adfm.201805402 . / Interfacial study of the formation mechanism of corrosion resistant strontium phosphate coatings upon Mg-3Al-4.3Ca-0.1Mn ( Sharelink ). Chong Ke, Ming-Shi Song, Rong-Chang Zeng *, Yao Qiu, Yu Zhang, Ruifeng Zhang, Rui-Liang Liu, Ivan Cole, Nick Birbilis, Xiaobo CHEN*. Corrosion Science (IF4.862) .151, 2019: 143-153. https://doi.org/10.1016/j.corsci.2019.02.024 . / Corrosion resistance and drug release profile of gentamicin-loaded polyelectrolyte multilayers on magnesium alloys: Effects of heat treatment . Yanbin Zhao; Xueyang Chen; Shuo-Qi Li*; Rongchang Zeng *; Fen Zhang; Zhenlin Wang; Shaokang Guan. Journal of Colloid Interface Science (IF5.091), 547, 2019: 309–317. https://doi.org/10.1016/j.jcis.2019.04.017 . / Deflated balloon-like nitrogen-rich sulfur-containing hierarchical porous carbons for high-rate supercapacitors. Chang-Ce Ke,Ning Zhang,Feng Liu,Qing-Yu,Feng-Yun Wang,Lei Liu,Ru-Liang Zhang,Xin Liu, Rong-Chang Zeng . Applied Surface Science (IF4.439) , 2019, https://doi.org/10.1016/j.apsusc.2019.04.132 . / Corrosion resistance of glucose-induced hydrothermal calcium phosphate coating on pure magnesium . Ling- Yu Li, Lan-Yue Cui, Bin-Liu, Rong-Chang Zeng *, Xiao-Bo Chen, Shuo-Qi Li, Zhen-Lin Wang, En-Hou Han. Applied Surface Science (IF4.439), 465 , 2019: 1066-1077. https://doi.org/10.1016/j.apsusc.2018.09.203 / In vitro and in vivo investigation on biodegradable Mg-Li-Ca alloys for bone implant application . Xia Dandan, Liu Yang, Wang Siyi, Zeng Rongchang , Liu yunsong, Zheng Yufeng, Zhou Yongsheng. Science China Materials (IF4.318), 62( 2) , 2019: 256–272 . DOI: 10.1007/s0843-018-9293-8 . / Corrosion resistance and antibacterial properties of hydroxyapatite coating induced by gentamicin-loaded polymeric multilayers on magnesium alloys . Xiao-Jing Ji, Ling Gao, Jia-Cheng Liu, Jing Wang, Qiang Cheng, Jian-Peng Li, Shuo-Qi Li*, Ke-Qian Zhi*, Rong-Chang Zeng *, Zhen-Lin Wang. Colloids and Surfaces B: Biointerfaces (IF 3.997 ), 179(1), 2019: 429-436 https://doi.org/10.1016/j.colsurfb.2019.04.029 . / In vitro corrosion resistance and antibacterial performance of a novel tin dioxide-doped calcium phosphate coating on a degradable Mg-1Li-1Ca alloy . Lan-Yue Cui, Guang-Bin Wei, Zhuang-Zhuang Han, Rong- Chang Zeng* , Lei Wang, Yu-Hong Zou, Shuo-Qi Li, Dao-Kui Xu, Shao-Kang Guan . Journal of Materials Science and Technology (IF3.609) . 35, 2019: 254-265. https://doi.org/10.1016/j.jmst.2018.09.052 . / Recent advances in biodegradation controls over Mg alloys for bone fracture management: A review (Sharelink) . Ming-Shi Song, Rong- Chang Zeng , Yun-Fei Ding, Rachel W. Li, Mark Easton, Ivan Cole, Nick Birbilis, Xiao-Bo Chen * . Journal of Materials Science and Technology (IF3.609) . 35(2019)535–544 . https://doi.org/10.1016/j.jmst.2018.10.008 / Corrosion resistance of in-situ growth of nano-sized Mg(OH) 2 on micro-arc oxidized magnesium alloy AZ31 ˗Influence of EDTA . Chang-Yang Li, Xiao-Li Fan, Rong-Chang Zeng *, Lan-Yue Cui, Shuo-Qi Li, Fen Zhang, Qing-Kun He, M. Bobby Kannan, Hong-Wei (George) Jiang, Dong-Chu Chen, Shao-Kang Guan. Journal of Materials Science and Technology (IF3.609) , 35(6), 2019: 1088-1098. DOI: 10.1016/j.jmst.2019.01.006 . / Optimized preparation of Co-Pi decorated g-C3N4@ZnO shell-core nanorod array for its improved photoelectrochemical performance and stability. Mengmeng Sun, Zhuoyuan Chen, XuhongJiang, Chang Feng, Rongchang Zeng . Journal of Alloys and Compounds ( IF3.779 ) , 780, 2019: 540-551. https://doi.org/10.1016/j.jallcom.2018.12.019 / Fe-doped Ag 2 S with excellent peroxidase-like activity for colorimetric determination of H 2 O 2 . Yanan Ding, Hao Liu, Lin-Na Gao, Min Fu, Xiliang Luo, Xiao Zhang, Xianxi Zhang, Qingyun Liu* , Rong-Chang Zeng *. Journal of Alloys and Compounds ( IF3.779 ) , 785 (2019) 1189-1197. DOI : 10.1016/j.jallcom.2019.01.225 . / CorrosionresistanceofbioinspiredDNA-inducedCa-Pcoatingonbiodegradable magnesium alloy. Ping Liu, Jia-Min Wang, Xiao-Tong Yu, Xiao-Bo Chen, Shuo-Qi Li, Dongchu Chen, Shao-Kang Guan, Rong-Chang Zeng *, Lan-Yue Cui. JournalofMagnesiumand Alloys . 7, 2019: 144-154. https://doi.org/10.1016/j.jma.2019.01.004 . 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Rong-Chang Zeng *, Zhen-Guo Liu, Fen Zhang, Shuo-Qi Li, Hong-Zhi Cui, En-Hou Han. Journal of Materials Chemistry A , 2014, 2,13049–13057. IF7.443 Corrosion of magnesium alloy AZ31: The influenceofbicarbonate, sulphate, hydrogen phosphate and dihydrogen phosphate ionsinsaline solution . Rongchang Zeng *, Yan Hu,Shaokang Guan,Hongzhi Cui, Enhou Han. Corrosion Science , 86（2014）171-182. IF4.422, SCI 被引40次 Corrosion and characterisation of dual phase Mg-Li-Ca alloy in Hank’ s solution: the influence of microstructural features . Rong-Chang Zeng *, Lu Sun, Yu-Feng Zheng, Hong-Zhi Cui, En-Hou Han. Corrosion Science ,79, 2014: 69-82. IF4.422 . 2015年ESI高引论文 . Corrosion resistance of calcium-modified zinc phosphateconversion coatings on magnesium-aluminium alloys . Rong-Chang Zeng *, Fen Zhang, Zi-Dong Lan,Hong-Zhi Cui, En-Hou Han. Corrosion Science , 88, 2014: 452–459. IF4.422 , SCI 被引49次 , Corrosion resistance of Mg-Al-LDH coating onmagnesium alloyAZ31 . Fen Zhang, Zhen-Guo Liu, Rong-Chang Zeng *,Shuo-Qi Li, Hong-Zhi Cui, Liang Song, En-Hou Han. Surface Coatings Technology , 258, 2014, 1152–1158. SCI 被引28次 Cr 2 O 3 nanoparticlesmodified TiO 2 nanotubesfor enhancing visible photoelectrochemicalperformance. Fen Zhang, Jin Tao, Rong-Chang Zeng , HongzhiCui,and Liang Song. Journal of Nanoscience and Nanotechnology.14(9), 2014, 7022–7026. In vitro corrosion of Mg-6Zn-1Mn-4Sn-1.5Nd/0.5Yalloys. Rong-Chang Zeng *, Lei Wang, Ding-Fei Zhang, Hong-Zhi Cui, En-Hou Han. Frontiers of Materials Science , 8(3), 2014: 230-243 (Cover article) Preface for the special issue onlight metals as biomaterials . Guang-Ling Song , Rong-Chang Zeng .Frontiers of Materials Science, 8(3), 2014: 199-199. In vitro corrosion of Mg–1.21Li–1.12Ca-1Y alloy . Rongchang Zeng *,Weichen Qi, Fen Zhang, Hongzhi Cui,Yufeng Zheng. Progress in Natural Science: Materials International , 24(5), 2014: 492–499. SCI 被引14次 In vitro degradation of MAO/PLAcoating on Mg-1.21Li-1.12Ca-1.0Y alloy. Rong-Chang ZENG , Wei-ChenQI, Ying-Wei SONG, Qin-Kun HE, Hong-Zhi CUI, En-Hou HAN. Frontiers of Materials Science , 2014. 8(4): 343-353. SCI 被引17次 Microstructuralevolution and delayed hydridecracking of FSW-AZ31 magnesium alloy during SSRT . Rongchang Zeng *, Wolfgang Dietzel, Rudolf Zettler, Wei-min Gan, XinXin Sun, Trans. Nonferrous Met. Soc. China , 24(2014)3060-3069. Soluble Polyaniline Nanofibers PreparedviaSurfactant-free Emulsion Polymerization. Yanmin Wang , Kai Chen , Tingxi Li , Huimin Li , Rongchang Zeng , Ruliang Zhang , Yijie Gu , Jianxu Ding , Hongquan Liu . Synthetic Metals . 198 (2014)293–299. 医用新型Mg-Li-Ca合金材料体外生物相容性及生物活性评价. 刘睿 , 姜科 , 赵保东 *, 曾荣昌 *, 徐昊 , 王兰英 .中国组织工程研究 . 2014, 18(52):8409-13. 2013 Influence of solution temperature on corrosion resistance of Zn-Ca phosphate conversion coating on biomedicalMg-Li-Ca alloys . R.C. Zeng *, Xin-XinSun, Ying-wei Song, Fen Zhang, Shuo-Qi Li, Hong-Zhi Cui, En-Hou Han, Trans.Nonferrous Met. Soc. China , 23(11), 2013: 3293−3299. Self-Assembled Silane Film and Silver Nanoparticles Coating on Magnesium Alloys for Corrosion Resistance and Antibacterial Applications. R.C. Zeng *, LijunLiu, Shuoqi Li, Yuhong Zou, Fen Zhang, Yanan Yang, Hongzhi Cui, En-hou Han, Acta Metall. Sin. (Engl. Lett.), 26(6), 2013: 681-686. 2012 A critical discussion on influence of loading frequency on fatigue crack propagation behavior for extruded Mg-Al-Zn alloys . Rongchang Zeng *, EnhouHan, Wei Ke. International Journal of Fatigue , 36(1), 2012: 40-46. https://doi.org/10.1016/j.ijfatigue.2011.09.001 2011 Characterization of calcium-modified zinc phosphateconversion coatings and their influences on corrosion resistance of AZ31 alloy . Rongchang Zeng *, Zidong Lan, Linghong Kong,Yuanding Huang,Hongzhi Cui. Surface and Coatings Technology , 205, 2011: 3347-3355. SCI 被引62次 Corrosionof an extruded magnesium alloy ZK60 component-The role ofmicrostructural features. Rongchang Zeng *, K.U. Kainer, C. Blawert, W. Dietzel. Journal of Alloys and Compounds , 509,2011:4462-4469. SCI 被引32次 Characteristics of the functionally graded coating fabricated by plasma transferred arc centrifugalcladding. Feng Lu, Huiqi Li,QiangJi, Rongchang Zeng , Shufeng Wang, Jing Chi, Min Li, Lu Chai, Hui Xu Surface and Coatings Technology , 2011,205: 4441-4446. Study on corrosion of medical Mg–Ca and Mg–Li–Ca alloys. Rongchang Zeng *, Xiaolong Guo, Chenglong Liu, Hongzhi Cui, Wu Tao, Yunyi Liu, Bowen Li. ACTA METALLURGICA SINICA ， 2011, 47(11): 1477-1482. 医用Mg-Ca和Mg-Li-Ca合金腐蚀研究, 金属学报 , 2011, 47(11): 1477-1482. Research progress on surface modification of magnesium alloys for medical applications, Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals, vol. 21, no. 1, pp. 35–43, 2011. 医用镁合金表面改性研究进展. 曾荣昌 *, 孔令鸿、陈君、崔洪芝、刘成龙.中国有色金属学报， 21(1), 2011: 35-43. 被引65次 蛋白质作用下医用金属材料的腐蚀行为研究进展.刘成龙,王猛,张春艳,王玥霁, 曾荣昌 ,黄伟九. 中国腐蚀与防护学报 ,2011,31(01):10-17. Influence of silane on corrosion performance of silane-modified acrylate interpenetrating polymer networks coating on magnesium alloy AZ31. Rong-Chang ZENG *, Jun CHEN, Chen-LanLIU, Hong-Zhi CUI. Materials Science Forum, 686(2011)186-191. 2010 Influence of microstructure on tensileproperties and fatigue crack growth in extruded magnesium alloy AM60. Rongchang Zeng *, Enhou Han, Wei Ke, Wolfgang Dietzel, Karl Ulrich Kainer,Andrejs Atrens. International Journal of Fatigue , 32, 2010: 411-419. SCI 被引42次 Influence of silane on corrosionresistance of magnesium alloy AZ31 with thermally sprayed aluminum coating. R.C.Zeng *, J. Chen, J. Kuang, J. Zhang. Rare Metals , 29(2), 2010: 193-197. SCI 被引19次 Preparation of calcium phosphatecoatingson Mg-1.0Ca alloy . Chun-Yan Zhang, Rong-Chang Zeng *,Cheng-LongLiu, Rongshi Chen, Jia-Cheng Gao. Transactions of Nonferrous Metals Society of China , 20, 2010: s 655-659. SCI 被引28次 Comparison of calcium phosphatecoatings on Mg–Al and Mg–Ca alloys and their corrosion behavior in Hank'ssolution .Chun-Yan Zhang, Rong-Chang Zeng, Cheng-LongLiu, Jia-Cheng Gao. Surface and Coatings Technology , 204(21-22) 2010: 3636-3640. SCI 被引45次 In Vitro Corrosion Degradation Behaviour of Mg-Ca Alloy in the Presence of Albumin . C.L. Liu,Y.J. Wang, R.C. Zeng , X.M. Zhang,W.J. Huang, P.K. Chu. Corrosion Science , 52(10),2010:3341-3347. SCI 被引74次 Influence of pH values on electroless NiP-SiC plating on AZ91D magnesium alloy . Yin-ning GOU, Wei-jiu HUANG, Rong-Chang ZENG , Yi ZHU. Transactions of Nonferrous Metals Society of China. 2010 , 20( s 2): 674-678. Comparisonin characterization of composite and sol-gel coating on AZ31 magnesium alloy. Z.L. Wang; R. C. Zeng . Transactions of Nonferrous Metals Societyof China. 2010, 20: s 665- s 669. Influence of bath temperature of conversion treatment process on corrosion resistance of zinc calcium phosphate conversion film on AZ31 magnesium alloy, Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals, vol. 20, no. 8, pp. 1461–1466, 2010. 镀液温度对镁合金AZ31 表面锌钙系磷化膜耐蚀性的影响. 曾荣昌*、兰自栋.中国有色金属学报，20 , 2010: 1461-1466. Corrosion behavior of magnesium alloy AZ31 with calcium phosphate coating in Hank 's solution, Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society, vol. 38, no. 5, pp. 885–891, 2010. 镁合金AZ31 表面Ca-P涂层在Hank's 溶液中的腐蚀行为. 张春艳、高家诚、曾荣昌、刘成龙、吴霞, 吴迪.硅酸盐学报，38(5)2010:885-891. Electrochemically deposited Ca-P coatings on magnesium alloy, Gongneng Cailiao/Journal of Functional Materials, vol. 41, no. 6, pp. , 2010. 电化学沉积法制备镁基Ca-P 生物陶瓷涂层的研究. 张春艳、高家诚、曾荣昌、杨惠、吴地. 功能材料，41(6)2010: 952-956, 960. Effect of Mnsup2+/supconsumption in phosphate conversion solution on performance of phosphorized films on AZ31 magnesium alloy surface, Corrosion Science and Protection Technology, vol. 22, no. 5, pp. 377–379, 2010. 2009 Progress and challenge for magnesium alloys as biomaterials. R.C. Zeng ,W. Dietzel, F. Witte, N. Hort. Advanced Engineering Materials ,10(8), 2008: B3-B14. SCI 被引346次 ， ESI高引论文 Corrosion of friction stir welded magnesium alloy AM50. Rong-Chang Zeng , Jun Chen, Wolfgang Dietzel, Rudolf Zettler, Jorge F. dos Santos, M. LuciaNascimento, Karl Ulrich Kainer. Corrosion Science , 51(2009)1738-1746. SCI 被引50次 Influence of load frequency and ageingheat treatment on fatigue crack propagation rate of as-extruded AZ61 alloy. R.C.Zeng , W. Ke, E.H. Han, International Journal of Fatigue , 31(3), 2009: 463–467. SCI 被引26次 Fatigue crack propagation behavior of as- extruded magnesium alloy AZ80. R. C. Zeng , Y. B. Xu, W. Ke and E. H. Han. Materials Science and Engineering A , 509, 2009: 1-7. SCI 被引28次 Galvanic corrosion of AM50 magnesium alloy with cathodic electrophoretic coating and Q235 steel, Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering, vol. 38, no. 7, pp. 1158–1163, 2009. Corrosion behavior of magnesium alloy AX53 in simulated body fluids. Jun WANG, Rongchang ZENG , Jun CHEN, Rongshi CHEN. Materials Science Forum, 610-613 (2009)1174-1178. Progress of chemical conversion coatings on magnesium alloys, Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals, vol. 19, no. 3, pp. 397–404, 2009. 镁合金表面化学转化膜研究进展.曾荣昌*，兰自栋等.中国有色金属学报，19(3), 2009: 397-403.被引94次 Study on chemical deposition of calcium phosphate bioceramic coating on AZ31 magnesium alloy surface, Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering, vol. 38, no. 8, pp. 1363–1367, 2009. 镁合金AZ31表面液相沉积Ca-P 生物陶瓷涂层的研究. 张春艳、 曾荣昌 、 陈君 、 杨惠、 田中青. 稀有金属材料与工程，38(8), 2009, 1363-1367. 重庆嘉陵江石门大桥腐蚀防护调查及建议. 曾荣昌 *，靳强，赖文超，王俊，陈君.材料保护, 2009, 42(02): 72-73. Quality management and control of anti-corrosion project, Corrosion and Protection, vol. 30, no. 3, pp. 207–210, 2009. 企业防腐蚀工程质量管理与控制及若干存在问题探讨. 曾荣昌 *.腐蚀与防护,2009,30(3):207-210. Corrosion and protection of concrete platform for stacking and transporting urea, Corrosion and Protection, vol. 30, no. 4, pp. 128–131, 2009. 尿素储运水泥混凝土地坪的腐蚀防护. 曾荣昌 *、柳国皇. 腐蚀与防护,2009,30(2): 128-130. 2008 Microstructure evolution and tensile properties of friction-stir-welded AM50 magnesium alloy . R.C.Zeng *, J. Chen, W. Dietzel, R. Zettler, K.U. Kainer. Transactions of Nonferrous Metals Society of China,18, 2008: s 76-80. SCI 被引13次 Characterization and wear resistance of micro-arc oxidation coating on magnesium alloy AZ91 in simulated body fluids . J. Chen, R. C. Zeng *, W. J. Huang, Z.Q. Zheng, Zhenlin Wang, Jun Wang. Transactions of Nonferrous Metals Society of China, 18, 2008: s 361-364. SCI 被引21次 Research and progress of galvanic corrosion of Magnesium alloys. ZENG RC, CHEN Jun, ZHANG Jin. 2008, 22(01): 107-109. 镁合金电偶腐蚀研究及其进展.曾荣昌*、陈君、张津. 材料导报， 2008, 22(01): 107-109. 2007 Corrosion of artificial aged magnesium alloy AZ80 in 3.5wt% NaCl solution. R.C.Zeng, W. Ke, E.H. Han. Journal of Materials Science and Technology ,23(3), 2007: 363-368. pH value insimulated occluded cell formagnesium alloys . Rongchang Zeng *, Chen Jun. Transactions of Nonferrous Metals Society of China , 17, 2007: s 193-199. Electrochemical behavior of magnesium alloys in simulated body fluids . Rongchang Zeng *, JunChen, W.Dietzel, N.Hort, K.U. Kainer. Transactions of Nonferrous Metals Society of China , 17, 2007: s 166- 169. A study on the SCC susceptibility of friction stir welded AZ31Mg sheet. M. Bobby Kannan, W. Dietzel, R. Zeng , R. Zettler, J. dos Dantos. Materials Science and Engineering: A , 460, 2007, 243-250. SCI 被引57次 Effect of Temperature and Relative Humidity on Fatigue Crack Propagation Behaviof of AZ61 Magnesium Alloy. Rongchang ZENG , Enhou HAN, Wei KE. Materials Science Forum, 546-549, 2007:409-412. Fatigue Crack Propagation Behavior of Mg-Al-Zn Alloys. Rongchang ZENG , Enhou HAN, Wei KE,etc. Proceedings of the 7 th International Conference on Magnesium Alloys and Their Applications. 2007:666-672. Effects of Post Heat Treatment on the Interfacial Characteristics of Aluminum Coated AZ91D Magnesium Alloy. JinZhang,Ying Wang, Rong-Chang Zeng , etc. Materials Science Forum,546-549, 2007:529-532 2006 Review of studies on corrosion of magnesium alloys . Rongchang Zeng , Zhang Jin, Huang Weijiu,W. Dietzel, K.U. Kainer, W. Ke. Transactions of Nonferrous Metals Society of China , 16, 2006:S763-S771. SCI 被引140次 Thickness effects on corrosion and wearresistance properties ofmicro-arc discharge oxide coatings on AZ91D magnesiumalloys.Wei-jiu Huang, Ming Liu, Zhao-feng Li, Rong-chang Zeng . Trans. Nonferrous Met. Soc. China 16, 2006: s1827-s1830. 2005 Effect of ph values on as-extruded magnesium alloy AM60, Jinshu Xuebao/Acta Metallurgica Sinica, vol. 41, no. 3, pp. 307–311, 2005. pH值对挤压镁合金AM60腐蚀的影响. 曾荣昌 、周晚秋、韩恩厚、柯伟. 金属学报 ，44(3), 2005: 307-311. Mechanism of corrosion fatigue for as-extruded magnesium alloy AZ80, Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research, vol. 18, no. 6, pp. 561–567, 2004. 挤压镁合金AM60的腐蚀疲劳. 曾荣昌 、韩恩厚、柯伟、徐永波. 材料研究学报，19(1), 2005: 1-7. Fatigue and Corrosion Fatigue of Magnesium Alloys. Rongchang ZENG , Enhou HAN, Wei KE. Material Science Forum, 488-489, 2005: 721-724 A comparative study on the fretting wear resistant properties of AZ91D and AM60B magnesium alloys. Weijiu Huang, Rongchang Zeng , Anhua Chen. Material Science Forum, 488-489, 2005: 745-748 2004 Mechanism of corrosion fatigue for as-extruded magnesium alloy AZ80, Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research, vol. 18, no. 6, pp. 561–567, 2004. 变形镁合金AZ80的腐蚀疲劳机理. 曾荣昌 、韩恩厚、柯伟、徐永波.材料研究学报，18(6), 2004: 561-567. 镁合金AZ91D焊接组织及腐蚀行为研究. 曾荣昌 ，明勇, 黄伟九，韩恩厚，柯伟.材料导报，2004, 18(z3) Research on fretting wear behavior of AM60B magnesium alloy in sliding regime, Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology, vol. 26, no. 9, pp. 23, 2004. AM60B镁合金在滑移区的微动磨损行为研究.黄伟九、陈安华、侯滨 、曾荣昌、 周仲荣、孙智富. 武汉理工大学学报，26(9), 2004: 23-26. 2003 Effect of rolled microstructure on fatigue properties of magnesium alloy AM60, Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research, vol. 17, no. 3, pp. 241–246, 2003. 轧制组织对镁合金AM60疲劳性能的影响. 曾荣昌 、韩恩厚、柯伟、刘路、徐永波.材料研究学报,17(3),2003: 241-245. 2002 镁合金的腐蚀行为与表面防护方法. 周婉秋，单大勇， 曾荣昌 ，韩恩厚，柯伟.材料保护,2002,35(07):1-3. 2001 Recent development and application of magnesium alloys, Jinshu Xuebao/Acta Metallurgica Sinica, vol. 37, no. 7, pp. 673-685 , 2001. 镁合金的最新发展及应用前景. 曾荣昌 , 柯伟,徐永波,韩恩厚, 朱自勇. 金属学报 , 40(7), 2001: 673-685.（SCI被引94次， CNKI被引 1164次 ，《 金属学报 》最高被引论文） 2000 桥梁的腐蚀与防护. 曾荣昌 .材料保护 , 2000, 33(10):38-40.
个人分类: 论文写作|12002 次阅读|0 个评论
Sci.Rep 4-7577(2014) 复杂社会网络中的双向选择
热度 1 bhwangustc 2014-12-24 22:26
Scientific Reports 4-7577 (2014) 复杂社会网络中的双向选择 Bidirectional selection between two classes in complex social networks Bin Zhou, Zhe He, Luo-Luo Jiang, Nian-Xin Wang Bing-Hong Wang The bi-directional selection between two classes widely emerges in various social lives, such as commercial trading and mate choosing. Until now, the discussions on bidirectional selection in structured human society are quite limited. We demonstrated theoretically that the rate of successfully matching is affected greatly by individuals’ neighborhoods in social networks, regardless of the type of networks. Furthermore, it is found that the high average degree of networks contributes to increasing rates of successful matches. The matching performance in different types of networks has been quantitatively investigated ， revealing that the small-world networks reinforces the matching rate more than scale-free networks at given average degree. In addition, our analysis is consistent with the modeling result, which provides the theoretical understanding of underlying mechanisms of matching in complex networks. 双向选择在人类的日常生活中非常普遍，例如：市场贸易买卖双方的交易成功，商业合作伙伴的选择，一年一度的毕业生与招聘方之间的就业双向选择，以及城市和社区中的男女择偶双向选择相亲大会等等。我们已经给出一个初步的双向选择系统模型，并且得到82组相亲大会实证数据的检验，【见： PLoS ONE 9, e81424 (2014) A model of two-way selection system for human behavior . 】。 但是以上的研究实质上属于一个全联通网络上的双向选择机制。本文将双向选择机制拓展到任意一种网络上，包括各种网络模型（ER随机网络，WS小世界网络，BA无标度网络）以及现实世界中的各种真实网络。我们的研究结果表明：网络结构对双向选择匹配率有重要影响。可以发现：WS小世界网络的拓扑结构最有利于匹配，而BA无标度网络则最不利于匹配。这似乎表明：WS小世界网络的形成对应于现实生活中社交网络的演化形成是朝着更有利于异性个体之间匹配趋势进行的。我们通过断边重连改变WS小世界的网络结构，发现双向选择系统的匹配结果将随断边重连概率之变化而呈现丰富多样的变化。其内在原因的揭示，有待后续工作的进一步深入研究。 原文下载： SciRep 4-7577(2014) ZhouHeJiangWangWang 复杂社会网络中的双向选择.pdf
个人分类: 统计物理复杂系统研究进展|4331 次阅读|1 个评论
Wiley Anywhere Article新增文章引用查询功能！
热度 1 WileyChina 2014-12-4 11:31
AnywhereArticle 发布新功能 Anywhere Article 是Wiley OnlineLibrary 为用户提供的增强型HTML 文章服务，适用于Wiley 期刊。现在，Anywhere Article 有新功能发布了。 新功能：引用工具 通过增强型HTML 文章上的反馈链接（如下图所示），我们广泛收集了读者的反馈。这些反馈为我们应该发布哪些新功能提供了参考价值。目前为止，读者最普遍需求是增加 具有显示/ 保存引用功能的工具 。 欢迎在反馈页面上留下关于Anywhere Article的意见和建议，点击进入 在此，我们很荣幸地向您宣布以下新功能已经正式发布了 ： ◀ 使用不同的在线参考文献管理工具/ 软件查看或者保存引用。这些参考文献管理工具/ 软件包括： iteULike, Mendeley andRefWorks, EndNote, Reference Manager, ProCite and BibteX ◀ 引用了当前阅读文章的信息和文章链接，并包括 CrossRef 和 Web ofScience 中的被引频次信息 ◀ 每篇文章包含此文章的引用格式 新功 能 可见于 增强型HTML 文章界面，“作 者信息”下，“DOI ”信息旁（如图所示）： Readcube Checkout 正式对WileyOnline Library 移动用户开放 我们同时很荣幸地向您宣布 ：Wiley Online Liabrary 的个人用户现在不仅可以通过电脑，也可以通过平板或其他移动设备使用Readcube Checkout 购买PDF 格式的期刊全文。 特别提示 ：目前，通过Readcube Checkout 的移动浏览器版本 只能 购买 PDF 格式的期刊全文 ；使用电脑的用户可以选择“租赁”（只可读）、“云端”（只可读）或者“全文下载”（可读，可打印、保存）。 点击这里进入 Readcube Checkout 详细介绍
个人分类: 业界新闻|4351 次阅读|2 个评论
科学院不再是事业单位了，科技部真的撤销了
热度 2 scientister 2014-10-15 10:20
科技部这几年风口浪尖，院士门也让科学院勉为其难，现在，一切都将改变…… 路马消息 http://www.newsmth.net/nForum/#!article/DAE.THU/431773 科技部关于科学的职能划到教育科学部；关于技术的职能划到工业和信息技术部。 希望科学网不会变。 好人做到底，希望科学网网管妹妹的待遇不降低。
个人分类: 生活点滴|2147 次阅读|6 个评论
Science China Chemistry发表马於光教授综述文章
sciencepress 2014-3-19 14:19
激子 ( 或自旋 ) 统计是基本的物理原理，决定了有机半导体器件中单线态与三线态激子的形成比例 (1:3) 。近年来，基于新原理 ( 三线态反系间窜越、延迟荧光 ) 的 OLED 材料引起广泛关注。该类材料在理论方面重新催热了关于自旋统计的探讨，在应用方面有望发展成为低成本、高性能的新一代 OLED 材料，因此得到了国内相关领域的高度重视，多个研究机构已布局开展相关研究。从目前的发展情况看，该类材料的发光机制、原理以及进一步材料设计思路还有待探讨和明确。 受《中国科学：化学》副主编曹镛院士邀请，华南理工大学发光材料与器件国家重点实验室马於光教授为 Science China Chemistry （《中国科学：化学》英文刊） 撰写了专题论述文章： Progress in next-generation organic electroluminescent materials ： material design beyond exciton statistics ， 发表在 2014 年第 3 期 。 该文综述了激子统计研究进展，分析了多种提高激子利用效率的途径，提出该课题组提高激子利用率的“热激子过程”新思路及杂化局域-电荷转移(HLCT)态材料设计原理，器件实现接近100%的激子利用效率。 全文免费下载地址： http://chem.scichina.com:8081/sciBe/EN/volumn/current.shtml （境内） http://link.springer.com/article/10.1007/s11426-013-5046-y （境外，免费 Open Access 3 个月） SCIENCE CHINA Chemistry 2014, 57 No. 3 pp. 335-345 欢迎阅读~
个人分类: 《中国科学》论文|10292 次阅读|0 个评论
一篇论文位列Top25 Hottest Articles 第一
热度 2 rczeng 2014-3-14 19:58
Materials Science Transactions of Nonferrous Metals Society of China October to December 2013 Review of studies on corrosion of magnesium alloys • Article Transactions of Nonferrous Metals Society of China, Volume 16, June 2006, Pages s763-s771 ZENG, R.c.; ZHANG, J.; HUANG, W.j.; DIETZEL, W.; KAINER, K.U.; BLAWERT, C.; KE, W. Total concentrations and different fractions of heavy metals in sewage sludge from Guangzhou, China • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 8, August 2013, Pages 2397-2407 LIU, J.y.; SUN, S.y. Effects of welding parameters and tool geometry on properties of 3003-H18 aluminum alloy to mild steel friction stir weld • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 7, July 2013, Pages 1957-1965 DEHGHANI, M.; MOUSAVI, S.A.A.A.; AMADEH, A. Materials flow and phase transformation in friction stir welding of Al 6013/Mg • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 5, May 2013, Pages 1253-1261 POURAHMAD, P.; ABBASI, M. Cited by Scopus (1) Application of EBSD technique to ultrafine grained and nanostructured materials processed by severe plastic deformation: Sample preparation, parameters optimization and analysis • Article Transactions of Nonferrous Metals Society of China, Volume 22, Issue 8, August 2012, Pages 18 01-18 09 CHEN, Y.j.; HJELEN, J.; ROVEN, H.J. Effects of pin angle and preheating on temperature distribution during friction stir welding operation • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 9, September 2013, Pages 27 08-27 13 KEIVANI, R.; BAGHERI, B.; SHARIFI, F.; KETABCHI, M.; ABBASI, M. Anisotropy of localized corrosion in 7050-T7451 Al alloy thick plate • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 9, September 2013, Pages 2483-2490 SONG, F.x.; ZHANG, X.m.; LIU, S.d.; HAN, N.m.; LI, D.f. Three-point bending behavior of aluminum foam sandwich with steel panel • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 9, September 2013, Pages 2491-2495 ZU, G.y.; LU, R.h.; LI, X.b.; ZHONG, Z.y.; MA, X.j.; HAN, M.b.; YAO, G.c. Mechanical properties, corrosion behaviors and microstructures of 7075 aluminium alloy with various aging treatments • Article Transactions of Nonferrous Metals Society of China, Volume 18, Issue 4, August 2008, Pages 755-762 LI, J.f.; PENG, Z.w.; LI, C.x.; JIA, Z.q.; CHEN, W.j.; ZHENG, Z.q. Cited by Scopus (51) Recent development of LiNixCoyMnzO2: Impact of micro/nano structures for imparting improvements in lithium batteries • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 1, January 2013, Pages 1 08-11 9 PAN, C.c.; BANKS, C.E.; SONG, W.x.; WANG, C.w.; CHEN, Q.y.; JI, X.b. Cited by Scopus (2) Strength and fatigue fracture behavior of Al-Zn-Mg-Cu-Zr(-Sn) alloys • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 10, October 2013, Pages 2817-2825 CHEN, L.; YAN, A.; LIU, H.s.; LI, X.q. Comparison of microstructure and mechanical properties of conventional and refilled friction stir spot welds in AA 6061-T6 using filler plate • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 10, October 2013, Pages 2833-2842 VENUKUMAR, S.; YALAGI, S.; MUTHUKUMARAN, S. Cited by Scopus (1) A review on in vitro corrosion performance test of biodegradable metallic materials • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 8, August 2013, Pages 2283-2293 ZHEN, Z.; XI, T.f.; ZHENG, Y.f. Ecological risk assessment of heavy metals in sediments of Xiawan Port based on modified potential ecological risk index • Article Transactions of Nonferrous Metals Society of China, Volume 22, Issue 6, June 2012, Pages 1470-1477 ZHU, H.n.; YUAN, X.z.; ZENG, G.m.; JIANG, M.; LIANG, J.; ZHANG, C.; YIN, J.; HUANG, H.j.; LIU, Z.f.; JIANG, H.w. Cited by Scopus (5) Microstructure and mechanical properties of dissimilar pure copper/1350 aluminum alloy butt joints by friction stir welding • Article Transactions of Nonferrous Metals Society of China, Volume 22, Issue 6, June 2012, Pages 1298-1306 LI, X.w.; ZHANG, D.t.; QIU, C.; ZHANG, W. Cited by Scopus (2) Thermal modeling of underwater friction stir welding of high strength aluminum alloy • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 4, April 2013, Pages 1114-1122 ZHANG, H.j.; LIU, H.j.; YU, L. Recycling of automotive aluminum • Article Transactions of Nonferrous Metals Society of China, Volume 20, Issue 11, November 2010, Pages 2057-2063 CUI, J.; ROVEN, H.J. Cited by Scopus (13) Analysis and optimization of drilling parameters for tool wear and hole dimensional accuracy in B4C reinforced Al-alloy • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 9, September 2013, Pages 2524-2536 TASKESEN, A.; KUTUKDE, K. Adsorption behavior and adsorption mechanism of Cu(II) ions on amino-functionalized magnetic nanoparticles • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 9, September 2013, Pages 2657-2665 LI, H.; XIAO, D.l.; HE, H.; LIN, R.; ZUO, P.l. Environmental availability and ecological risk assessment of heavy metals in zinc leaching residue • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 1, January 2013, Pages 2 08-21 8 MIN, X.b.; XIE, X.d.; CHAI, L.y.; LIANG, Y.j.; LI, M.; KE, Y. Anodizing of 2024-T3 aluminum alloy in sulfuric-boric-phosphoric acids and its corrosion behavior • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 9, September 2013, Pages 2551-2559 SAEEDIKHANI, M.; JAVIDI, M.; YAZDANI, A. Dissimilar friction stir welding between 5052 aluminum alloy and AZ31 magnesium alloy • Article Transactions of Nonferrous Metals Society of China, Volume 20, July 2010, Pages s619-s623 YAN, Y.; ZHANG, D.t.; QIU, C.; ZHANG, W. Heavy metals contamination characteristics in soil of different mining activity zones • Article Transactions of Nonferrous Metals Society of China, Volume 18, Issue 1, February 2008, Pages 2 07-21 1 LIAO, G.l.; LIAO, D.x.; LI, Q.m. Cited by Scopus (19) Development, modeling and application of piezoelectric fiber composites • Article Transactions of Nonferrous Metals Society of China, Volume 23, Issue 1, January 2013, Pages 98-107 LIN, X.j.; ZHOU, K.c.; ZHANG, X.y.; ZHANG, D. Mechanism of phosphorus removal in beneficiation of high phosphorous oolitic hematite by direct reduction roasting with dephosphorization agent • Article Transactions of Nonferrous Metals Society of China, Volume 22, Issue 11, November 2012, Pages 28 06-28 12 XU, C.y.; SUN, T.c.; KOU, J.; LI, Y.l.; MO, X.l.; TANG, L.g. Cited by Scopus (3)
个人分类: 科研|3995 次阅读|4 个评论
[转载]R语言中的因子
JiuBaiYi 2014-1-16 17:52
统计基础不好，所以一直无法理解R语言中的因子（factor），复习笔记的时候突然有了新的理解，立马再做个笔记，同时也与同样基础 薄弱的网友分享我的理解。 在R语言中，因子（factor）表示的是一个符号、一个编号或者一个等级，即，一个点。例如，人的个数可以是1，2，3，4......那么因子就包括，1，2，3，4.....还有统计量的水平的时候用到的高、中、低，也是因子，因为他是一个点。与之区别的向量，是一个连续性的值，例如，数值中有1，1.1，1.2......可以作为数值来计算，而因子则不可以。如果用我自己的理解，简单通俗来讲：因子是一个点，向量是一个有方向的范围。 在R中，如果把数字作为因子，那么在导入数据之后，需要将向量转换为因子（factor），而因子在整个计算过程中不再作为数值，而是一个符号而已。 个人愚见，请多多批评指正。 本文链接： http://www.dengfeilong.com/post/factor.html 因子（Factor） 一个因子不仅包括分类变量本身还包括变量不同的可能水 平（即使它们在数据中不出现）。因子函数factor用下面的选项创建一 个因子： factor(x, levels = sort(unique(x), na.last = TRUE), labels = levels, exclude = NA, ordered = is.ordered(x)) levels 用来指定因子可能的水平（缺省值是向量x中互异的值）；labels 用来指定水平的名字；exclude表示从向量x中剔除的水平值；ordered是 一个逻辑型选项用来指定因子的水平是否有次序。回想数值型或字符型 的x。下面有一些例子： factor(1:3) 1 2 3 Levels: 1 2 3 factor(1:3, levels=1:5) 1 2 3 Levels: 1 2 3 4 5 factor(1:3, labels=c(A, B, C)) A B C Levels: A B C factor(1:5, exclude=4) 1 2 3 NA 5 Levels: 1 2 3 5 函数levels用来提取一个因子中可能的水平值： ff - factor(c(2, 4), levels=2:5) ff 2 4 Levels: 2 3 4 5 levels(ff) 2 3 4 5 http://www.biostatistic.net/thread-2342-1-1.html 子(factor)和有序因子(ordered factor) 因子用来存储类别变量(categorical variables)和有序变量，这类变量不能用来计算而只能用来分类或者计数。 因子表示分类变量，有序因子表示有序变量。 生成因子数据对象的函数是factor(),语法是factor(data, levels, labels, ...)，其中data是数据，levels是因子水平向量，labels是因子的 标签向量。 1、创建一个因子。 例1：colour - c('G', 'G', 'R', 'Y', 'G', 'Y', 'Y', 'R', 'Y') col - factor(colour) col1 - factor(colour, levels = c('G', 'R', 'Y'), labels = c('Green', 'Red', 'Yellow')) #labels的内容替换colour相应位置对应levels的内容 col2 - factor(colour, levels = c('G', 'R', 'Y'), labels = c('1', '2', '3')) col_vec - as.vector(col2) #转换成字符向量 col_num - as.numeric(col2) #转换成数字向量 col3 - factor(colour, levels = c('G', 'R')) 2、创建一个有序因子。 例1：score - c('A', 'B', 'A', 'C', 'B') score1 - ordered(score, levels = c('C', 'B', 'A')); score1 3、用cut()函数将一般的数据转换成因子或有序因子。 例1：exam - c(98, 97, 52, 88, 85, 75, 97, 92, 77, 74, 70, 63, 97, 71, 98, 65, 79, 74, 58, 59, 60, 63, 87, 82, 95, 75, 79, 96, 50, 88) exam1 - cut(exam, breaks = 3) #切分成3组 exam2 - cut(exam, breaks = c(0, 59, 69, 79, 89, 100)) #切分成自己设置的组 attr(exam1, 'levels'); attr(exam2, 'levels'); attr(exam2, 'class') ordered(exam2, labels = c('bad', 'ok', 'average', 'good', 'excellent')) #一个有序因子 http://blog.sina.com.cn/s/blog_59f8748e01011in6.html
个人分类: 数据统计原理与应用|31960 次阅读|0 个评论
Wiley部分期刊开始试用Article level metrics
热度 1 WileyChina 2013-6-14 15:27
Article level metrics（ALMs ） 已经成为评估单篇论文影响力的重要工具，一些较为传统的度量方式，如引用和使用量，仅能评估一篇论文的学术可见度（ scholarly visibility ），而新的度量方式则旨在通过分析与某篇文章相关的“在线讨论（ online conversation ）”来衡量其社会可见度（ social visibility ）。【见 Article-Level Metrics a SPARC Primer by Greg Tananbaum 】 对于作者而言，这种新的度量方式有助于他们了解论文的实时社会影响；对于编辑人员而言，则可以充分量化其出版物（期刊）的可见度和覆盖范围。 新的度量方法，例如由 Altmetric 提供的 Article level metrics（ALMs ）， 可以计算单篇文章的直接和具体影响力，而并非仅依赖于期刊影响因子等传统基准。 Altmetric 可以分析某篇文章在 Twitter 、 Facebook 、 Google+ 、 Pinterest 和博客、报纸、杂志以及 Mendeley 和 CiteULike 等平台中被提及的情况，然后根据其受关注的质量和数量，对文章进行评分。 Altmetric 分数主要基于三种因素：提及该文章的人数、提及的平台（例如报纸、推文），以及某人提及该文章的频度。 Wiley 目前正在多种期刊中试用 Article level metrics（ALMs ）， 包括一些订阅期刊和开放获取期刊，试用期为六个月，期刊包括 Advanced Materials 、 AngewandteChemie 、 BJUI 、 Brain and Behavior 、 Methods in Ecology and Evolution 以及 EMBO Molecular Medicine 。 “我们的期刊发表许多拥有高访问率和引用率的文章，” Advanced Materials 主编 Peter Gregory 表示。“我们希望通过各种渠道为读者提供了解这些研究成果的机会，让作者拥有更广泛的社会媒体曝光度，覆盖到全球的新闻和科学媒体。浏览 Altmetric 数据很有意思，它可以更好地量化期刊文章的影响力。” 补充实例： 以Angewandte Chemie为例，现在读者可以在文章页面上看到ALMs统计结果，以下为实时截图：
个人分类: All Sub|6071 次阅读|3 个评论
Journal article or book chapter？这是一个问题！
热度 10 曹聪 2013-3-11 20:09
俺写了篇“ 吾爱名期刊，但吾更爱吾师 ”，蒙科学网编辑MM不弃戴花，真有点受宠若惊。 趁热打铁 ，再说几句。 对吃研究饭的人来说，到哪儿发表论文还真是个问题，尤其是在期刊的Impact Factor或档次将决定晋升、奖励等的时代。 对于从事社会科学研究的人来说，除了journal article，还有 authored book （ 著书立说）和book chapter（在论文集上发表）的选择。当然，经济学是个例外，唯论文是 举，这就更显示出 阿尔钦的豁达。 一般来说， book chapter在评审时 不 太 受重视 。不过，俺又听说，当某人还 不 怎么出名时，只 有 投稿硬闯一招。 而一旦有点小名气了，约稿 便会 上 门 。 但是 ，论文集 的出版周期往往比较长，而一旦 commit了，覆水难收，再给期刊投稿就有点那个了。 可不，俺和几位同事 的一篇文章，一年半前就被收入一个 论文集 。 可 到 现在，不要说不见人下楼， 楼梯也 听不到响声了。又不能投给journal了。 编者是 大牛，而出版社 又是同样很牛的大学出版社。 所以，纠结 归纠结 ，只能既来之则安之。 元芳，你说呢？
个人分类: 科学出版|24842 次阅读|15 个评论
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