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Topological r-entropy and measure-theoretic r-entropy of a continuous map

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Science China Mathematics 2011年第6期54卷 1197-1205页

作者： REN YunLi HE LianFai LV JinFeng zheng guoping College of Mathematics and Information Science Hebei Normal University Shijiazhuang 050016 China College of Mathematics and Information Technology Hebei Normal University of Science and Technology Qinhuangdao 066004 China

In this paper,we introduce the concept of measure-theoretic r-entropy of a continuous map on a compact metric space,and get the results as follows:***-theoretic entropy is the limit of measure-theoretic r-entropy and topological entropy is the limit of topological r-entropy(r → 0);*** r-entropy is more than or equal to the supremum of 4r-entropy in the sense of Feldman's definition,where the measure varies among all the ergodic Borel probability measures.

关键词： topological r-entropy measure-theoretic r-entropy

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节理裂隙岩体超大断面隧道开挖工法研究

绍兴文理学院学报 2024年第2期44卷 1-10页

作者：孙海涛郑国平沈吉宝庄一舟田伟绍兴文理学院土木工程学院浙江绍兴312000 杭州新奥土木工程技术有限公司浙江杭州310051 浙江工业大学土木工程学院浙江杭州310014 浙江数智交院科技股份有限公司浙江杭州310030

为研究不同开挖工法对围岩中节理发育的超大断面隧道稳定性影响,以在建大罗山公路隧道为工程背景,运用离散元数值分析方法,研究了双侧壁导坑法、CRD法、CD法和三台阶法四种开挖工法下节理面剪切位移、隧道开挖轮廓位移、地表沉降、围岩... 详细信息

为研究不同开挖工法对围岩中节理发育的超大断面隧道稳定性影响,以在建大罗山公路隧道为工程背景,运用离散元数值分析方法,研究了双侧壁导坑法、CRD法、CD法和三台阶法四种开挖工法下节理面剪切位移、隧道开挖轮廓位移、地表沉降、围岩位移、支护结构内力的变化规律.研究结果表明:双侧壁导坑法在控制节理裂隙岩体各位移变化及隧道支护结构内力方面效果最好,CRD法和CD法次之,不推荐将三台阶法作为节理发育地层中大断面公路隧道的开挖工法.

关键词：公路隧道节理岩体开挖工法离散元

A Study on the Mineralogical Characteristics and the Relations Between the Formation and the Evolution of Kaolin Deposit in Suzhou

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A Study on the Mineralogical Characteristics and the Relatio...

A Study on the Mineralogical Characteristics and the Relations Between the Formation and the Evolution of Kaolin Deposit in Suzhou

作者： Zhou guoping zheng Zhi

Main mineral compositions of the kaolins in Suzhou include kaolinites (or- dered-poorly ordered),

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A Study on the Mineralogical Characteristics and the Relatio...

Dynamic Relationship Between Human Microbiota and Host Factors

作者： Zhou guoping zheng Zhi

Main mineral compositions of the kaolins in Suzhou include kaolinites (or- dered-poorly ordered),

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Infectious Microbes & Diseases 2024年第3期6卷 106-107页

作者： Qi zheng Yuetong Li Wenfeng Zhu Xiang Xu Baozhen Luo guoping Sheng Lanjuan Li State Key Laboratory for Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious DiseasesNational Medical Center for Infectious DiseasesCollaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesThe First Affiliated HospitalZhejiang University School of MedicineHangzhouChina Zhejiang Chinese Medical University HangzhouChina Key Laboratory of Artificial Organs and Computational Medicine in Zhejiang Province Shulan(Hangzhou)Hospital Affiliated to Shulan International Medical CollegeZhejiang Shuren UniversityHangzhouChina.

There have been considerable investigations into the composition of the microbiota inhabiting various anatomical sites of the human body,including but not limited to the gut and ***,the distribution of the microbiota composition and functionality across anatomical sites within the same individual are not yetwell-established,in particular in relation with host health and disease.

关键词： microbiota dynamic equilibrium host

Causality Between Gut Microbiota and Inflammatory Bowel Disease:A Bidirectional Mendelian Randomization Study

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Infectious Microbes & Diseases 2024年第2期6卷 93-99页

作者： Qi zheng Yuetong Li Jiali Ni Yong Huang Jiajun Wu Xiang Xu guoping Sheng Lanjuan Li State Key Laboratory for Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious DiseasesNational Medical Center for Infectious DiseasesCollaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesThe First Affiliated HospitalZhejiang University School of MedicineHangzhouChina Key Laboratory of Artificial Organs and Computational Medicine in Zhejiang Province Shulan(Hangzhou)Hospital Affiliated to Shulan International Medical CollegeZhejiang Shuren UniversityHangzhouChina Zhejiang Chinese Medical University HangzhouChina

The exact relationship between inflammatory bowel disease(IBD)and gut microbiota(GM)is still *** study aimed to explore the cause-and-effect relationship between IBD and GM by Mendelian randomization *** IBD data used in this study were obtained from Genome-Wide Association *** GM data were from the Dutch Microbiome Project and included 207 taxa and 205 microbiota-associated *** Mendelian randomization analysis was performed to investigate the relationship between GM and *** results demonstrated that susceptibility to developing IBD is negatively correlated with class Clostridia(OR=0.80,P=0.003),family Sutterellacea(OR=0.87,P=0.014),genus Coprobacter(OR=0.90,P=0.009),order Clostridiales(OR=0.80,P=0.003),phylum Firmicutes(OR=0.82,P=0.002)and Coprobacter fastidiosus(OR=0.90,P=0.009).Conversely,the risk of developing IBD was positively correlated with the phosphopantothenate biosynthesis I pathway(OR=1.17,P=0.006),Bacteroides caccae(OR=1.14,P=0.021)and Bacteroides uniformis(OR=1.26,P=0.003).Reverse causality was found between the phosphopantothenate biosynthesis I pathway and IBD(OR=1.03,P=0.04),but not for the remaining specific GM *** conclusion,our study demonstrated a causal relationship between specific GM features and IBD.

关键词： gut microbiota inflammatory bowel disease Mendelian randomization

基于JLAMT可视化建模的JMCT模拟计算

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强激光与粒子束 2017年第3期29卷 90-95页

作者：郑俞全国萍李刚华北电力大学核科学与工程学院北京102206 国家核电技术有限公司北京软件技术中心北京100029 北京应用物理与计算数学研究所北京100094

JMCT是中国工程物理研究院高性能数值模拟软件中心粒子输运团队自主研发的三维蒙特卡罗模拟软件,JLAMT为其前处理可视化建模工具。使用JLAMT和JMCT程序对B&W,KRITZ,BEAVRS等系列基准题进行了模拟,并对有效增殖系数及计数功能进行了对比... 详细信息

JMCT是中国工程物理研究院高性能数值模拟软件中心粒子输运团队自主研发的三维蒙特卡罗模拟软件,JLAMT为其前处理可视化建模工具。使用JLAMT和JMCT程序对B&W,KRITZ,BEAVRS等系列基准题进行了模拟,并对有效增殖系数及计数功能进行了对比分析。其中有效增殖系数计算结果与MCNP5的最大偏差为KRITZ2装载方案19基准题的89.1pcm,除BEAVRS基准题外的计数结果与MCNP5的偏差基本小于2%,平均偏差在1%左右;BEAVRS基准题功率分布模拟结果与MCNP5及实测值最大偏差分别为7.06%,16.6%,控制棒价值计算与MCNP5及实测值均吻合较好。

关键词：蒙特卡罗可视化建模粒子输运

内部控制质量与股价崩盘风险:影响效果及路径检验

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审计研究 2017年第4期 48-55页

作者：黄政吴国萍东北师范大学商学院邮政编码130117

作为权力制衡的重要手段,内部控制能否制约管理层信息操纵行为进而降低股价崩盘风险值得深入研究。文章选取2000~2015年中国A股上市公司为研究对象,通过理论分析和实证检验考察了内部控制质量影响股价崩盘风险的客观表现和传导路径。结... 详细信息

作为权力制衡的重要手段,内部控制能否制约管理层信息操纵行为进而降低股价崩盘风险值得深入研究。文章选取2000~2015年中国A股上市公司为研究对象,通过理论分析和实证检验考察了内部控制质量影响股价崩盘风险的客观表现和传导路径。结果表明,随着上市公司内部控制质量的不断提升,股价崩盘风险显著降低;在进行了内生性检验、变更内部控制质量度量方法等一系列稳健性测试后,上述结论依然成立。进一步的影响机制分析和中介效应检验表明,信息披露质量和代理成本在内部控制质量影响股价崩盘风险中均发挥了显著的中介作用,即高质量的内部控制可以通过提升信息披露质量和减少代理成本来降低股价崩盘风险,该结论为深入理解内部控制影响股价崩盘风险的内在机制提供了可靠解释。

关键词：内部控制质量股价崩盘风险信息披露质量代理成本

SYNTHESIS OF POLYACETYLENE BY NOVEL CATALYSTS COMPOSED OF TRANSITION METAL 2-ETHYL HEXYL PHOSPHONATES AND ALUMINIUM TRIALKYLS

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Science in China,Ser.B 1987年第8期30卷 809-815页

作者：沈之荃王征王国平俞陆平 Department of Chemistry Zhejiang University Hangzhou

Polyacetylene is the most hopeful electrical conductive polymer, which is being exploited to fabricate plastic battery, solar energy cell etc. The catalysts used for the synthesis of high cis-polyacetylene films are mainly Ti（OC4H9）4-AlEt8 and rare-earth coordination catalysts as well as Co（NO3）2-NaBH4. This paper reports features of acetylene polymerization by novel catalysts composed of transition metal 2-ethyl hexyl phosphonates of the fourth periodic transitional series-Ti, V, Cr, Mn, Fe, Co, Ni and aluminium trialkyls. Except Ni catalyst system, all catalytic systems can promote polymerization of acetylene at room temperature to form a silvery-grey polyacetylene film with rich cis-content and high crystallinity. Under the experimental conditions tested, the catalytic activity of various systems shows the following sequence: Fe>Ti～V>Cr>Mn>Co>Ni The polyacetylene films obtained were characterized.

关键词： Cr SYNTHESIS OF POLYACETYLENE BY NOVEL CATALYSTS COMPOSED OF TRANSITION METAL 2-ETHYL HEXYL PHOSPHONATES AND ALUMINIUM TRIALKYLS AI PA MT than Ni