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中国上海科技馆屋面虹吸排水系统简述
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作者 孔祥锐 尹艳 《工程设计与施工》 2024年第6期70-72,共3页
上海科技馆是上海市政府为提高市民科学素质,而兴建的21世纪重大社会文化公益项目。上海科技馆主体1号楼建筑物因超大面积、特异形式屋面及屋面表面的多种异性构造物(月状圆鼓形平台、镂空环形和飞翼),导致屋面雨水采用传统重力排水系... 上海科技馆是上海市政府为提高市民科学素质,而兴建的21世纪重大社会文化公益项目。上海科技馆主体1号楼建筑物因超大面积、特异形式屋面及屋面表面的多种异性构造物(月状圆鼓形平台、镂空环形和飞翼),导致屋面雨水采用传统重力排水系统施工难度较大,经过对比计算设计,上海科技馆采用虹吸雨水排水系统进行屋面排水,采用压力多斗排水系统,合理配置集水井位置,划分集水区域,设置天沟收集不同区域雨水,满足设计要求,以保证屋面排水顺利进行。论文通过对虹吸雨水排水系统组成和原理的简介,以及屋面虹吸排水系统在上海科技馆项目的成功应用,总结上海科技馆屋面虹吸雨水排水系统的设计情况,为上海科技馆正在进行的更新改造提供依据,为后续运营提供保障。 展开更多
关键词 虹吸雨水 排水系统 科技馆
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Feasibility Analysis of in silico Cloning of Functional Candidate Genes in Tea (Camellia sinensis)
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作者 xiangrui kong 《Agricultural Biotechnology》 CAS 2015年第3期31-34,共4页
[ Objective ] This study aimed to verify the feasibility of in silico cloning of functional candidate genes in tea. [ Method ] Theobroma cacao caffeine syn- thase gene BCS1 was used as a probe to search the establishe... [ Objective ] This study aimed to verify the feasibility of in silico cloning of functional candidate genes in tea. [ Method ] Theobroma cacao caffeine syn- thase gene BCS1 was used as a probe to search the established tea EST database using BLAST; 26 tea ESTs highly homologous to BCS1 were obtained, which were assembled using CAP (contig assembly program) of BioEdit software; subsequently, two EST configs harboring ORF were obtained, which were named TCSnewl and TCSnew2, respectively. Nucleotide sequences and deduced amino acid sequences of theses two genes were compared with those of cDNA of tea caffeine synthase gene TCS in the GenBank database that was cloned with experimental biological method. A phylogenetic tree was constructed for homalogous analysis of the deduced amino acid sequences of theses three genes. [ Result] in silico cloning of functional candidate genes in tea using a homologous gene of distantly related species as a probe is a feasible technical means. [ Conclusion] This study provided the basis for in silico cloning of other functional genes in tea. 展开更多
关键词 TEA in silico cloning Caffeine synthase gene Phylogenetic tree
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On Some Properties of the Norm of the Spectral Geometric Mean
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作者 xiangrui kong 《Journal of Applied Mathematics and Physics》 2022年第12期3629-3634,共6页
In this paper, we consider the norms related to spectral geometric means and geometric means. When A and B are positive and invertible, we have ||A<sup>-1</sup>#B|| ≤ ||A<sup>-1</sup>σ<sub... In this paper, we consider the norms related to spectral geometric means and geometric means. When A and B are positive and invertible, we have ||A<sup>-1</sup>#B|| ≤ ||A<sup>-1</sup>σ<sub>s</sub>B||. Let H be a Hilbert space and B(H) be the set of all bounded linear operators on H. Let A ∈ B(H). If ||A#X|| = ||Aσ<sub>s</sub>X||, ?X ∈ B(H)<sup>++</sup>, then A is a scalar. When is a C*-algebra and for any , we have that ||logA#B|| = ||logAσ<sub>s</sub>B||, then is commutative. 展开更多
关键词 Kubo-Ando Means Spectral Geometric Mean Geometric Mean C*-Algebra
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同步辐射技术在大气科学领域的研究进展
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作者 孔祥瑞 窦静 +2 位作者 陈淑贞 汪冰冰 吴志军 《化学进展》 SCIE CAS CSCD 北大核心 2022年第4期963-972,共10页
作为新颖和独特的大型仪器,同步辐射装置正在越来越多地被应用到大气和环境科学的研究中。本文介绍了基于同步辐射的探测技术的理论原理、关键技术以及近期的主要研究成果。涉及的同步辐射技术包括:常压X射线光电子能谱(APXPS)、近边X... 作为新颖和独特的大型仪器,同步辐射装置正在越来越多地被应用到大气和环境科学的研究中。本文介绍了基于同步辐射的探测技术的理论原理、关键技术以及近期的主要研究成果。涉及的同步辐射技术包括:常压X射线光电子能谱(APXPS)、近边X射线吸收精细结构(NEXAFS)和扫描透射X射线显微镜(STXM)。本文按实验类型进行了分类,即APXPS实验、流体束实验和STXM实验。主要内容包括:(1)冰表面;(2)盐表面;(3)酸性溶液;(4)有机溶液;(5)盐溶液;(6)臭氧分解;(7)黑碳;(8)冰核;(9)吸湿性;(10)反应机理。同步辐射设施的发展为气溶胶科学和大气异相化学的研究提供了强大的工具。可以预见越来越多的重要大气过程和机制将通过基于同步辐射的研究所揭示,而这也将体现同步辐射装置在大气和环境领域的巨大潜力和价值。 展开更多
关键词 气溶胶 大气科学 同步辐射 界面科学 异相化学 常压X射线光电子能谱 扫描透射X射线显微镜 X射线吸收光谱
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Near-Optimal Transmission Optimization of Cache-Based SVC Vehicle Video
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作者 Xianlang Hu He Dong +3 位作者 xiangrui kong Ruibing Li Guangsheng Feng Hongwu Lv 《国际计算机前沿大会会议论文集》 2020年第1期341-353,共13页
A problem of video streaming of scalable video coding(SVC)is studied in vehicular networks.To improve the performance of the video streaming services and alleviate the pressure on backhaul links,the small cell base st... A problem of video streaming of scalable video coding(SVC)is studied in vehicular networks.To improve the performance of the video streaming services and alleviate the pressure on backhaul links,the small cell base stations(SBS)is proposed with caching ability to assist the content delivery.In this paper,it introduced the problem of joint optimization of caching strategy and transmission path in SBS cache cluster.An integer programming problem was formulated to maximize the average quality of experience.In order to obtain the globally optimal solution,the primal problem was first relaxed,then an adaptive algorithm was used based on the joint KKT condition,and the branch definition algorithm was applied.Extensive simulations were performed to demonstrate the efficiency of our proposed caching strategy. 展开更多
关键词 SVC CACHE Transmission method Vehicle video
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