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Chinese Journal of Polymer Science 2021年第10期39卷 1225-1234,I0004页

作者： Shuo-Feng Liang chen nie Jie Yan Qi-Jin Zhang Si Wu Chinese Academy of Sciences Key Laboratory of Soft Matter Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleAnhui Key Laboratory of Optoelectronic Science and TechnologyDepartment of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

Photoinduced reversible liquefaction and solidification of polymers enable processing and healing of polymers with *** azobenzene-containing polymers(azopolymers)exhibit two types of photoinduced liquefaction properties:photoinduced reversible solid-to-liquid transition and directional *** the first type,light switches the glass transition temperature(T_(g))values of azopolymers and induces reversible solid-to-liquid *** the second type,polarized light guides solid azopolymers to flow along the polarization ***,we compare the two types of photoliquefaction and discuss their *** progresses and applications based on photoliquefaction of azopolymers are also highlighted.

关键词： Photoresponsive Polymer Photoliquefaction Azobenzene Photoisomerization

Non-cross-linked Polystyrene Supported Cyclosulfamide： A New Chiral Auxiliary for Highly Stereoselective Alkylation Reactions

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Chemical Research in Chinese Universities 2014年第6期30卷 1051-1056页

作者： LU Taotao nie Junqi chen Zuxing YANG Guichun LU Cuifen Hubei Collaborative Innovation Center for Advanced Organochemical Materials Key Laboratory for the Synthesis and Application of Organic Functional Molecules Ministry of Education Hubei University Wuhan 430062 P. R. China

The asymmetric alkylation reactions induced by non-cross-linked polystyrene supported cyclosulfamide chiral auxiliary occurred in moderate to good yields with a very high stereoselectivity（e.e.〉99%）. Compared to non-supported cyclosulfamide chiral auxiliary, this chiral auxiliary can be recovered by simple precipitation and filtration, and could be reused at least four cycles without appreciable reduction in the yield or stereoselectivity.

关键词： Polystyrene Cyclosulfarnide Chiral auxiliary Alkylation reaction

Reasonable compensation coefficient of maximum gradient in long railway tunnels

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Journal of Modern Transportation 2011年第1期19卷 12-18页

作者： Sirong YI Liangtao nie Yanheng chen Fangfang QIN School of Civil Engineering MOE Key Laboratory of High-Speed Railway Engineering Southwest Jiaotong University Chengdu610031 China

This paper deals with the theory and calculation methods for compensation of the gradient in railway tunnels through theoretical analysis, numerical calculation, and statistic regression methods. On the basis of the principle that the resultant force is zero, the formula of the maximum calculated gradient was derived for the freight and passenger line and high-speed passenger special line. The formula of aerodynamic drag in tunnel is provided using the domestic and foreign relevant experimental investigations, and revised with modem train and engineering parameters. A calculation model of aerodynamic drag when the train goes through a single-tracked tunnel was built. Finally, the concept of maximum calculated gradient was adopted to revise the formula for compensation of the gradient in railway tunnels.

关键词： railway tunnel maximum gradient profile gradient compensation

Probe into the “Mania for School District Houses”——Research into the Motivations for Purchasing School District Houses from the Perspective of Cultural Capital

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Contemporary Social Sciences 2020年第1期5卷 125-139页

作者： nie chen chen Zetao School of Humanities and Social Sciences (School of Public Administration) Beihang University

In recent years,the"mania for school district houses"has disrupted the housing market and undermined education equity and class mobility,thus becoming a common *** existing research focus on market motivations for purchasing school district houses while neglecting the connections between school district houses and cultural and social elements in the process of class *** make up for this deficiency this article introduces the neighborhood-based cultural capital theory to explore the diversified motivations,the processes of motivation formation,and the determining factors in purchasing school district *** and analysis of interview materials revealed that while theories based on western experience can explain the basic purchasing motivations and their formation processes,there are distinct and varied purchasing motivations in China,more comprehensive and complex forms of capital exchange,and more dynamic factors that impact purchases of school district *** on solving the"mania for school district houses"are also presented.

关键词： school district houses institutionalized cultural capital objective cultural capital social capital economic capital

RESEARCH FOR CLUSTERING OF FEATURE MANUFACTURING-ORIENTED

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Chinese Journal of Mechanical Engineering 2002年第1期15卷 11-14页

作者： Liu Xuan Shen Xiaohong nie Xuejun chen Shan College of Mechanical Engineering and Automation， Beijing University of Industry and Commerce，Beijing 100037，China College of Mechanical Engineering and Automation Beijing University of Industry and Commerce 北京 100037

The following questions are discussed: feature cluster, feature clusterconcept and the reasoning formula. The defect based on approach direction and feed direction areanalyzed. Feature tool axis direction concept and ... 详细信息

关键词： Feature Clustering of feature Tool axis direction

Global variance reduction method for global Monte Carlo particle transport simulations of CFETR

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Nuclear Science and Techniques 2017年第8期28卷 126-132页

作者： Xing-chen nie Jia Li Song-Lin Liu Xiao-Kang Zhang Ping-Hui Zhao Min-You Ye German Vogel Xiao Yang Qing-Jun Zhu School of Nuclear Science and Technology University of Science and Technology of China Institute of Plasma Physics Chinese Academy of Sciences

It can be difficult to calculate some under-sampled regions in global Monte Carlo radiation transport calculations. The global variance reduction(GVR) method is a useful solution to the problem of variance reduction everywhere in a phase space. In this research, a GVR procedure was developed and applied to the Chinese Fusion Engineering Testing Reactor(CFETR). A cylindrical CFETR model was utilized for comparing various implementations of the GVR method to find the *** was found that the flux-based GVR method could ensure more reliable statistical results, achieving an efficiency being 7.43 times that of the analog case. A mesh tally of the scalar neutron flux was chosen for the GVR method to simulate global neutron transport in the CFETR *** distributed uniformly in the system were sampled adequately through ten iterations of GVR weight *** voxels were scored, and the average relative error was 2.4% in the ultimate step of the GVR iteration.

关键词：方差模拟粒子输运 GCR 辐射输运蒙特卡洛空间问题聚变工程

自由市场还是政府主导?后危机时代英法两国学前教育政策转型的比较及启示

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广东社会科学 2020年第5期 200-211页

作者：聂晨北京航空航天大学公共管理学院北京100191

欧洲学前教育体系在后危机时代出现了不同程度的福利多元主义倾向。其中,英法两国面临着学前教育需求激增和财政紧缩影响供给的矛盾,分别选择了自由市场和政府干预的转型路径。本文在比较和分析了英法两国学前教育体系在供给、财政支持... 详细信息

欧洲学前教育体系在后危机时代出现了不同程度的福利多元主义倾向。其中,英法两国面临着学前教育需求激增和财政紧缩影响供给的矛盾,分别选择了自由市场和政府干预的转型路径。本文在比较和分析了英法两国学前教育体系在供给、财政支持和治理监督方面的转型特点和效果后发现,在学前教育服务的可获得性方面,英国更加不充分不均衡;在可负担性方面,英国家庭面临着更严重的负担性问题;而在质量方面,英国面临着更大的挑战。据此,本文指出了英法转型的经验对中国科学落实多渠道供给学前教育过程中,客观认识政府和市场的作用,有机结合政策的渐进性、侧重性和精准性与市场灵活性,以及建立开放的监督评估机制方面的借鉴意义。

关键词：学前教育自由市场政府干预国际经验

从“三明治一代”到“中坚青年”:多重责任下角色冲突与角色增益的比较讨论

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中国青年研究 2021年第11期 4-12页

作者：聂晨北京航空航天大学公共管理学院

在"中坚青年"一词日益获得青年群体认可并引发共鸣的背景下,本文引入欧美"三明治一代"概念及角色紧张理论框架,基于20次深度访谈,在比较视野下探讨了青年在多重角色紧张中,事前角色内容和分工、事中角色冲突和增益、事后态度和应对措施... 详细信息

在"中坚青年"一词日益获得青年群体认可并引发共鸣的背景下,本文引入欧美"三明治一代"概念及角色紧张理论框架,基于20次深度访谈,在比较视野下探讨了青年在多重角色紧张中,事前角色内容和分工、事中角色冲突和增益、事后态度和应对措施。结果发现,青年在面临多重角色限制上具有相似性;但在角色分工的性别差异上,角色冲突内容及与角色增益比较上,对角色紧张的态度和应对上,都质疑了欧美经验。其原因来自结构层面的家庭主义传统奠定的基础,社会经济环境提供的动力,缺乏政策支持产生的压力;加上个体层面社会经济地位和承担角色的对比。据此,从政府、市场和公众协同缓解青年多重角色紧张提出了建议。

关键词：中坚青年三明治一代角色紧张角色冲突角色增益

比较视野下中东欧转型国家住房政策移植失灵的表现、成因和启示

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东北师大学报（哲学社会科学版） 2020年第5期 80-90页

作者：聂晨北京航空航天大学公共管理学院北京100191

中东欧国家在转型过程中分别移植了西欧的剩余化住房模式和一般化住房模式。然而,经过近30年的变迁过程,政策的空间位移并没有让中东欧转型国家的住房体系建立类似西欧的稳定住房市场,也没有实现多样化的范式转型,反而出现了不同程度的... 详细信息

中东欧国家在转型过程中分别移植了西欧的剩余化住房模式和一般化住房模式。然而,经过近30年的变迁过程,政策的空间位移并没有让中东欧转型国家的住房体系建立类似西欧的稳定住房市场,也没有实现多样化的范式转型,反而出现了不同程度的房价波动、金融支持缺乏、购房困难加剧以及居住质量恶化四个方面的失灵问题。本文通过运用转型国家住房体系的评价体系,在比较视野下分析了中东欧转型国家住房政策移植失灵的表现,并结合政策移植和失灵模型的最新进展,从福利供给网络组成的政府、市场和家庭三个层面分析了失灵的原因,最后提出中国如何有效借鉴其中的经验和启示。

关键词：中东欧转型国家政策移植住房政策政策失灵

“学区房热”探析——文化资本视角下对学区房购买动机的研究

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广东社会科学 2019年第1期 196-204页

作者：聂晨北京航空航天大学公共管理学院

近年来,"学区房热"扰乱住房市场,影响教育公平,垄断阶层流动的问题吸引了全社会的关注。既有研究较多聚焦于购买学区房的市场动机,忽视了学区房在阶层再生产过程中与文化和社会因素的联系。为弥补这一不足,本文引入基于邻里的文化资本... 详细信息

近年来,"学区房热"扰乱住房市场,影响教育公平,垄断阶层流动的问题吸引了全社会的关注。既有研究较多聚焦于购买学区房的市场动机,忽视了学区房在阶层再生产过程中与文化和社会因素的联系。为弥补这一不足,本文引入基于邻里的文化资本兑换理论,探索购买学区房的多元化动机、动机的形成过程和影响因素。通过对访谈材料的对比分析,本文发现尽管形成于西方经验的理论在一定程度上解释了学区房的购买动机和形成过程,但在中国,学区房购买动机更多样、资本兑换更全面和复杂、影响购买的因素也更动态。本文最后为破解"学区房热"提出建议。

关键词：学区房制度性文化资本客体性文化资本社会资本经济资本