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CF_4 decomposition without water over a solid ternary mixture consisting of NaF,silicon and one metal oxide

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Journal of Natural Gas Chemistry 2011年第5期20卷 543-546页

作者： Xiufeng Xu Xianjun Niu Jie Fan yanan Wang Ming feng School of Chemistry and Biology Yantai University Yantai 264005 Shandong China

A solid ternary mixture consisting of NaF, silicon and one of the metal oxides such as Al2O3, MgO, CaO, SrO, BaO was prepared and used as a defluorinated reagent for CF4 decomposition. The results show that the initial conversion of CF4 reached 100% over NaF-Si-MgO and NaF-Si-CaO at 850°C, and the reagent with NaF/Si/MgO molar ratio of 33/34/33 exhibited a high reactivity with a full conversion of CF4 lasting for 57 min. The plausible paths of CF4 decomposition over NaF-Si-Al2O3, NaF-Si-MgO, NaF-Si-CaO, NaF-Si-SrO and NaF-Si-BaO are proposed.

关键词： CF4 decomposition without water solid ternary mixture defluorinated reagent reactivity

A Class of Association Schemes and Their Automorphisms

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Algebra Colloquium 2022年第3期29卷 361-374页

作者： Changli Ma Shuxia Liu yanan feng Yang Zhang Liwei Zeng School of Mathematical Sciences Hebei Normal UniversityShijiazhuang 050024China Department of Mathematics and Physics Shijiazhuang Tiedao University Shijiazhuang 050043China School of Mathematical Sciences Hebei Normal University Shijiazhuang 050024China

In this paper,we construct a class of association schemes by using pairs of subspaces of vector spaces and determine their full automorphism groups.

关键词： association scheme automorphism relation graph

Investigating Sulfur Chemistry in the HD163296 Disk

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Research in Astronomy and Astrophysics 2024年第7期24卷 215-225页

作者： Rong Ma Donghui Quan Yan Zhou Jarken Esimbek Dalei Li Xiaohu Li Xia Zhang Juan Tuo yanan feng Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Research Center for Intelligent Computing Platforms Zhejiang LaboratoryHangzhou 311100China BinZhou University Binzhou 256600China Key Laboratory of Radio Astronomy Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China

Sulfur chemistry in the formation process of low-mass stars and planets remains poorly *** protoplanetary disks are the birthplace of planets and its distinctive environment provides an intriguing platform for investigating models of sulfur *** analyzed the Atacama Large Millimeter/submillimeter Array observations of CS 7-6 transitions in the HD 163296 disk and performed astrochemical modeling to explore its sulfur *** simulated the distribution of sulfur-containing molecules and compared it with observationally deduced fractional column *** have found that the simulated column density of CS is consistent with the observationally deduced fractional column densities,while the simulated column density of C_(2)S is lower than the observationally deduced upper limits on column *** results indicate that we have a good understanding of the chemical properties of CS and C_(2)S in the *** also investigated the influence of the C/O ratio on sulfur-containing molecules and found that the column densities of SO,SO_(2),and H_2S near the centra star are dependent on the C/O ***,we found that the N[CS]/N[SO]ratio can serve as a promising indicator of the disk’s C/O ratio in HD ***,the disk of HD 163296 provides a favorable environmen for the detection of sulfur-containing molecules.

关键词： Protoplanetary Disks-Astrochemistry-Molecular Processes

A Relationship between the Partial Bell Polynomials and Alternating Run Polynomials

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Open Journal of Discrete Mathematics 2023年第2期13卷 49-54页

作者： yanan feng Zhe Wang School of Mathematics and Statistics Northeastern University at Qinhuangdao Qinhuangdao China

In this note, we first derive an exponential generating function of the alternating run polynomials. We then deduce an explicit formula of the alternating run polynomials in terms of the partial Bell polynomials.

关键词： Alternating Run Polynomials Bell Polynomials Permutations

Couple Teach English,Promote Chinese Culture

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Women of China 2021年第6期 52-54页

作者： WANG SHASHA feng yanan 不详

After she recovered from treatment for tumors in her lung,feng yanan pursuedfurther studies in the United Kingdom and later,in 2012,became an English teacherin Guangzhou,in South China's Guangdong ***'s where she met MattMears,the British man with whom she later *** 2017,they returned to feng'shometown,Yinchuan,in Northwest China's Ningxia Hui Autonomous Region,andestablished an English-training organization,Mears International *** children in western China could receive top-quality English education.

关键词：少儿英语英语教育梅尔享受孩子留学优质

变迁的解构:后奥林匹克主义下四个议题的思考

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武汉体育学院学报 2017年第7期51卷 26-31页

作者：冯雅男孙葆丽北京体育大学研究生院北京100084 北京体育大学奥林匹克研究中心北京100084

作为人类文明的伟大创举和至高成就,奥林匹克运动的发展始终是全球普遍关注的命题,而现代奥林匹克运动在新的社会背景下进入了一个新的发展时期,奥林匹克当前的形势与未来的走向,需要我们予以新的解答。借助后奥林匹克主义的研究范式,... 详细信息

作为人类文明的伟大创举和至高成就,奥林匹克运动的发展始终是全球普遍关注的命题,而现代奥林匹克运动在新的社会背景下进入了一个新的发展时期,奥林匹克当前的形势与未来的走向,需要我们予以新的解答。借助后奥林匹克主义的研究范式,聚焦奥林匹克与未来全球城市的演进、奥林匹克与新媒介的崛起、奥运设项机制与体育运动的焕新、奥林匹克与运动员的再关怀四个重要的发展议题并展开深入探讨,从中映射和解构社会变迁中奥林匹克的变革,为奥林匹克未来的发展提供有益思路。

关键词：后奥林匹克主义奥林匹克运动奥运会改革全球城市的演进新媒介的崛起运动项目的焕新运动员的再关怀

聚氨酯泡沫填充的碳纤维增强复合材料锥管吸能性能数值模拟及试验验证

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中国机械工程 2018年第5期29卷 609-615页

作者：干年妃王多华冯亚楠张谦湖南大学汽车车身先进设计制造国家重点实验室长沙410082

提出了一种新型的碳纤维增强复合材料(CFRP)填充聚氨酯(PU)泡沫的汽车前部吸能结构,通过材料性能试验获得了PU泡沫、CFRP复合材料的力学性能参数及PU泡沫填充的CFRP锥管的准静态压缩吸能结果。应用LS-DYNA进行复合材料准静态压溃仿真分... 详细信息

提出了一种新型的碳纤维增强复合材料(CFRP)填充聚氨酯(PU)泡沫的汽车前部吸能结构,通过材料性能试验获得了PU泡沫、CFRP复合材料的力学性能参数及PU泡沫填充的CFRP锥管的准静态压缩吸能结果。应用LS-DYNA进行复合材料准静态压溃仿真分析,仿真结果与试验结果吻合较好,验证了复合材料填充结构有限元模型和材料模型的正确性,并且发现泡沫填充的CFRP锥管具有良好的吸能性能,填充结构比吸能高于两种材料单独使用时的比吸能之和。

关键词：准静态压缩聚氨酯泡沫碳纤维增强复合材料比吸能

Exploring Sulfur Chemistry in TMC-1 with NSRT

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Chinese Physics Letters 2024年第2期41卷 129-132页

作者： Wasim Iqbal Xiaohu Li Juan Tuo Ryszard Szczerba yanan feng Zhenzhen Miao Jiangchao Yang Jixing Ge Gleb Fedoseev Donghui Quan Qiang Chang Chuan-Lu Yang Tao Yang Gao-Lei Hou Yong Zhang Xuan Fang Xia Zhang Fangfang Li Rong Ma Xiaomin Song Zhiping Kou Yuxuan Sun Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Nicolaus Copernicus Astronomical Center Rabia´nska 887-100 Toru´nPoland Research Laboratory for Astrochemistry Ural Federal UniversityKuibysheva St.48620026 EkaterinburgRussia Astronomical Computing Research Center Zhejiang LaboratoryHangzhou 311100China School of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China School of Physics and Optoelectronic Engineering Ludong UniversityYantai 264025China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiaotong UniversityXi’an 710049China School of Physics and Astronomy Sun Yat-sen UniversityGuangzhou 510275China Laboratory for Space Research Faculty of ScienceThe University of Hong KongHong KongChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100012China

There have been several studies on sulfur depletion in dense cores like TMC-1(Taurus Molecular Cloud 1),employing updated reaction networks for sulfur species to explain the missing sulfur in the gas within dense *** of these studies used a C/O ratio of 0.7 or *** present NSRT(NanShan 26m Radio Telescope)observations of TMC-1 alongside results from time-dependent chemical simulations using an updated chemical *** findings highlight the impact of the C/O ratio on the gas-phase evolution of C2S and *** simulation results show that the C/O ratio is an important parameter,playing a fundamental role in determining the gas-phase abundances of sulfur species in dense cores.

关键词： sulfur Sulfur depletion

东京2020年奥运会延期对举办城市的影响与应对——基于奥运城市东京的历史经验

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体育学研究 2020年第3期34卷 19-26页

作者：冯雅男毕天杨北京体育大学管理学院北京100084

新型冠状病毒肺炎疫情的全球蔓延,致使东京2020年奥运会暂定推迟一年举行。作为深受疫情与奥运会延期影响的奥运城市东京,回顾前路是为未来探路的方法之一。比较并剖析1964年、2020年奥运会背后,作为奥运城市的东京以举办奥运会来促进... 详细信息

新型冠状病毒肺炎疫情的全球蔓延,致使东京2020年奥运会暂定推迟一年举行。作为深受疫情与奥运会延期影响的奥运城市东京,回顾前路是为未来探路的方法之一。比较并剖析1964年、2020年奥运会背后,作为奥运城市的东京以举办奥运会来促进其发展的主要目标、主要矛盾、所依托的国内外经济与政治环境、与国际奥委会及奥林匹克大家庭利益相关者之间的关系这四个层面,认为奥运城市的综合治理应更加可持续,办奥认识应更加理性,与国际奥委会及奥林匹克大家庭利益相关者之间应更加团结。

关键词：东京2020年奥运会奥林匹克运动东京1964年奥运会奥运城市城市发展