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大型实景戏剧综艺晚会的电视美术浅析

电视技术 2024年第4期48卷 82-84页

作者：周云华徐正霆马千里泰州广播电视台江苏泰州225309

介绍2024年中央广播电视总台戏曲频道元宵晚会的电视美术,阐述晚会舞美设计和灯光设计的思路,浅析电视美术在节目效果呈现上的重要影响。通过对电视美术各方面的理解与分析,展现如何将地域文化特色通过技术艺术手段融入大型活动,为以后... 详细信息

介绍2024年中央广播电视总台戏曲频道元宵晚会的电视美术,阐述晚会舞美设计和灯光设计的思路,浅析电视美术在节目效果呈现上的重要影响。通过对电视美术各方面的理解与分析,展现如何将地域文化特色通过技术艺术手段融入大型活动,为以后同类活动提供参考。

关键词：电视美术舞美设计方案灯光设计方案

SOME RESULTS ON BUNDLE SYSTEMS FOR A COUNTABLE DISCRETE AMENABLE GROUP ACTION

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Acta Mathematica Scientia 2023年第3期43卷 1382-1402页

作者：潘娟周云华 School of Mathematics and Statistics Chongqing Technology and Business UniversityChongqing400067China College of Mathematics and Statistics Chongqing UniversityChongqing401331China

We consider the style number, independence number and entropy for a frame bundle dynamical system. The base system of which is a countable discrete amenable group action on a compact metric space. We obtain the existence of cover measures, an ergodic theorem about mean linear independence and the style number, and a variational principle for style numbers and independence numbers. We also study the relationship between the entropy of base systems and that of their bundle systems.

关键词： mean linear independence style number independence number entropy

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防砂封隔器试验研究

石化技术 2024年第1期31卷 71-73页

作者：赵海杉魏爱拴周云华刘禹铭严孟凯中海油能源发展股份有限公司工程技术分公司天津300452 中海石油(中国)有限公司天津分公司天津300459

针对海上油气田开发,设计了一种防砂顶部封隔器套,通过试验验证了封隔器的性能,密封压力为35MPa。基于理论计算和有限元分析了试验过中发现的问题,为后期研究提供了有力的支撑,试验结果表明,该封隔器满足设计要求。

关键词：封隔器坐封验封悬挂力

SRB measures for pointwise hyperbolic systems on open regions

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Science China Mathematics 2020年第9期63卷 1671-1720页

作者： Jianyu Chen Huyi Hu yunhua zhou School of Mathematical Sciences&Center for Dynamical Systems and Di erential Equations Soochow UniversitySuzhou 215006China Department of Mathematics Michigan State UniversityEast LansingMI 48824USA College of Mathematics and Statistics Chongqing UniversityChongqing 401331China

A diffeomorphism f:M→M is pointwise partially hyperbolic on an open invariant subset N⊂M if there is an invariant decomposition TNM=Eu⊕Ec⊕Es such that Dxf is strictly expanding on Eu x and contracting on Esx at each x∈*** show that under certain conditions f has unstable and stable manifolds,and admits a nite or an in nite u-Gibbs measure μ.If f is pointwise hyperbolic on N,then μ is a Sinai-Ruelle-Bowen(SRB)measure or an in nite SRB *** applications,we show that some almost Anosov di eomorphisms and gentle perturbations of Katok's map have the properties.

关键词： pointwise hyperbolicity unstable manifold SRB measure almost Anosov di eomorphism Katok's map

The Lyapunov exponents of C^1 hyperbolic systems

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Science China Mathematics 2010年第7期53卷 1740-1749页

作者： zhou yunhua Sun WenXiang Chongqing Univ Coll Math & Phys Chongqing 400044 Peoples R China Peking Univ Sch Math Sci Beijing 100871 Peoples R China

Let f be a C 1 diffeomorphisim of smooth Riemannian manifold and preserve a hyperbolic ergodic measure μ. We prove that if the Osledec splitting is dominated, then the Lyapunov exponents of μ can be approximated by ... 详细信息

关键词： Lyapunov exponents nonuniformly hyperbolic approximation

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一种高温生产滑套研制

石化技术 2024年第2期31卷 25-27页

作者：赵海杉李宝龙周云华魏爱拴刘禹铭中海油能源发展股份有限公司工程技术分公司天津300452 中海石油(中国)有限公司天津分公司天津300459

针对海上油气田开发,本文设计了一种高温生产滑套,其适用温度为180℃,密封压力为35MPa。基于理论计算和有限元分析,研究了悬臂梁式和固支梁式两种锁定爪的锁定性能,理论计算的悬臂梁式和固支梁式锁定爪最大锁定力分别为545N和2853N,有... 详细信息

针对海上油气田开发,本文设计了一种高温生产滑套,其适用温度为180℃,密封压力为35MPa。基于理论计算和有限元分析,研究了悬臂梁式和固支梁式两种锁定爪的锁定性能,理论计算的悬臂梁式和固支梁式锁定爪最大锁定力分别为545N和2853N,有限元分析的悬臂梁式和固支梁式锁定爪最大锁定力分别为421N和2443N。对两种锁定爪的锁定力进行了试验验证,悬臂梁式和固支梁式锁定爪的最大实测锁定力分别为434N和2193N,试验结果表明,有限元分析结果更接近实验值。最后通过试验验证了生产滑套的高温密封性能,该生产滑套满足设计要求。

关键词：生产滑套锁定爪锁定力有限元分析

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MEASUREMENT AND EMPIRICAL ESTIMATE OF PHOTOSYNTHETICALLY ACTIVE RADIATION

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Journal of Geographical Sciences 1992年第1期 55-71页

作者： zhou yunhua Xiang Yueqin Institute of Geography CAS

The photosynthetically active radiation energy of the direct solar radiation,of diffused radiation and of global radiation were measured,and their diurnal variations,seasonal variations,regional differences and the impacts of meteorological factors on them were also *** the result of measurement combined with theoretical analysis climatological estimate formulas for the photosynthetically active radiation energy and photo-quantum flux density of the direct and the global radiation were proposed by the authors.

关键词： photosynthetically active radiation measurement empirical estimation

METRIC ENTROPY OF HOMEOMORPHISM ON NON-COMPACT METRIC SPACE

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Acta Mathematica Scientia 2011年第1期31卷 102-108页

作者：周云华 College of Mathematics and Statistics Chongqing University

Let T ： X → X be a uniformly continuous homeomorphism on a non-compact metric space （X, d）. Denote by X＊ = X ∪ {x＊} the one point compactification of X and T ＊： X＊ → X＊ the homeomorphism on X＊ satisfying T ＊｜X = T and T ＊x＊ = x＊. We show that their topological entropies satisfy hd（T, X） ≥ h（T ＊, X＊） if X is locally compact. We also give a note on Katok’s measure theoretic entropy on a compact metric space.

关键词： Topological entropy metric entropy non-compact metric space one point compactification

A CLIMATOLOGICAL STUDY ON SOLAR ULTRAVIOLET RADIATION

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Journal of Geographical Sciences 1994年第Z1期4卷 61-72页

作者： zhou yunhua Xiang Yueqin(Institute of Geography, CAS, Beijing 100101Prople’s Republic of China)

According to 2698 sets of observation data on solar direct radiation in sub-divisions of wave band at 10 spots of seven regions in China, the empirical formula and nomograph for estimating ultraviolet irradiance at wavelength λ< 400nm were obtained. Furthermore, a climatological method for estimating diffuse ultraviolet irradiance under various sky conditions was also developed based on radiation transmission equations. Using monthly mean daa at fixed time from eight stations, monthly mean daily totals of direct, diffuse and global ultraviolet radiations, as well as their fractions in the whole wave band were estimated respectively. Results show that the fraction of global ultraviolet radiation in the whole wave band is rather conservative, 5.5±0.4 Percent under clear sky condition, and 5.3±0.4 Percent under mean sky condition.

关键词： ultraviolet radiation empirical formula sky condition