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Silurian integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 1005-1035页

作者： zhongyang chen Qing chen Guangxu WANG Xiang FANG Peng TANG Guanzhou YAN Wenwei YUAN Bing HUANG Xiaole ZHANG Kui YAN Yuandong ZHANG Yi WANG State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China

The Silurian palaeontology and stratigraphy of the Qinghai-Tibetan Plateau have been studied for more than100 *** the launch of the Second Tibetan Plateau Scientific Expedition and Research,it is necessary to update the summaries of the Silurian stratigraphy and fossil assemblages of the Qinghai-Tibetan Plateau and their correlation with its surrounding *** this study,we have selected 33 sections from the Qinghai-Tibetan Plateau and its surroundings areas,summarised the available data in terms of stratigraphic regionalisation,lithostratigraphy,chronostratigraphy,and biostratigraphy,and divided the study area into four stratigraphic provinces:the Xizang-Western Yunnan-Western Sichuan Province,the KunlunQilian Province,the South China Province,and the Tarim *** general,the Silurian strata in the Qinghai-Tibetan Plateau is more complete than those in other areas of *** studies of the vertebrate faunas,sporomorph assemblages,and brachiopod faunas of the study area indicate a closer geographical relationship between the South China,Tarim,and Indochina palaeoplates,than previously *** with the surrounding areas where Silurian strata have been extensively studied,the study of Silurian strata in the main part of the Qinghai-Tibetan Plateau is still in the preliminary *** the future,it is necessary to conduct research on the age,distribution,and resource potential of basal Silurian black shales to provide new directions for shale gas exploration and development in *** shallow marine strata of the middle to upper Silurian require further *** that the Silurian System in the Qinghai-Tibetan Plateau is more complete,it has the potential to supplement and improve the study of the carbon isotope stratigraphy of the Silurian in China.

关键词： Qinghai-Tibetan Plateau Silurian Stratigraphic regionalisation Lithostratigraphy Biostratigraphy Palaeogeographical evolution

Ordovician integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 971-1004页

作者： Xiang FANG Yong Yi ZHEN Guangxu WANG Xin WEI zhongyang chen Yan LIANG Xuejin WU Wenjie LI Chao LI Renbin ZHAN Yuandong ZHANG State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China Geological Survey of New South Wales W.B.Clarke Geoscience CentreNSW 2753Australia University of Chinese Academy of Sciences Beijing 100049China

The Ordovician rocks on the Qinghai-Tibetan Plateau represent the oldest non-metamorphic strata,and are critical to understanding the history of regional geology and biotic evolution of the entire *** of Floian,Darriwilian,Sandbian,Katian and Hirnantian are represented in the plateau with a hiatus of variable duration occurring underneath the basal Ordovician across the *** stratigraphical regions,including the Himalaya,Gangdise-Zayu,Qiangtang-Qamdo,Songpan-Garze,and Karakoram-Kunlun-Altun,are differentiated for the Ordovician strata,which are correlated with their equivalents in the Sibumasu,Indochina,Qaidam-Qilian,Tarim-Tianshan,and the Yangtze(western margin)stratigraphical *** the QinghaiTibetan Plateau,graptolites,conodonts,and cephalopods are the most common and useful fossils for the Ordovician *** Ordovician biotas of the Qinghai-Tibetan Plateau bear some distinguishable palaeobiogeographical signatures,among which the cephalopods are characterized by the flourishing actinocerids of North China affinity in the Early-Middle Ordovician,and by the thriving lituitids and orthocerids of South China affinity in the Middle-Late *** occurrences and their palaeobiogeographical evolution provide critical evidence bearing on the reconstruction of the geological history of the Qinghai-Tibetan Plateau and surrounding terranes in northeastern *** stratigraphical successions of the Cambrian-Ordovician transition in the Himalaya and Lhasa and nearby Sibumasu terranes were significantly affected by the Kurgiakh Orogeny,which resulted in the extensive unconformity between the Ordovician and the underlying rocks in most areas of the Qinghai-Tibetan *** southern Xizang,a warm-water biota of Middle Ordovician age was recovered from oolitic limestones,suggesting a likely palaeogeographical location in low-latitudes near the *** the Himalaya and Sibumasu regions,the Upper Ordovician was typified by t

关键词： Ordovician Chronostratigraphy Lithostratigraphy Biostratigraphy Palaeobiogeography Qinghai-Tibetan Plateau

Silurian integrative stratigraphy, biotas and palaeogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年

作者： zhongyang chen Qing chen Guangxu WANG Xiang FANG Peng TANG Guanzhou YAN Wenwei YUAN Bing HUANG Xiaole ZHANG Kui YAN Yuandong ZHANG Yi WANG University of Chinese Academy of Sciences State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences

The Silurian palaeontology and stratigraphy of the Qinghai-Tibetan Plateau have been studied for more than100 years. With the launch of the Second Tibetan Plateau Scientific Expedition and Research, it is necessary to update the summaries of the Silurian stratigraphy and fossil assemblages of the Qinghai-Tibetan Plateau and their correlation with its surrounding areas. In this study, we have selected 33 sections from the Qinghai-Tibetan Plateau and its surroundings areas,summarised the available data in terms of stratigraphic regionalisation, lithostratigraphy, chronostratigraphy, and biostratigraphy,and divided the study area into four stratigraphic provinces:the Xizang-Western Yunnan-Western Sichuan Province, the KunlunQilian Province, the South China Province, and the Tarim Province. In general, the Silurian strata in the Qinghai-Tibetan Plateau is more complete than those in other areas of China. Palaeobiogeographical studies of the vertebrate faunas, sporomorph assemblages, and brachiopod faunas of the study area indicate a closer geographical relationship between the South China,Tarim, and Indochina palaeoplates, than previously considered. Compared with the surrounding areas where Silurian strata have been extensively studied, the study of Silurian strata in the main part of the Qinghai-Tibetan Plateau is still in the preliminary stage. In the future, it is necessary to conduct research on the age, distribution, and resource potential of basal Silurian black shales to provide new directions for shale gas exploration and development in China. The shallow marine strata of the middle to upper Silurian require further subdivision. Considering that the Silurian System in the Qinghai-Tibetan Plateau is more complete,it has the potential to supplement and improve the study of the carbon isotope stratigraphy of the Silurian in China.

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流动性覆盖率监管会影响货币政策风险承担渠道吗

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应用经济学评论 2024年第1期4卷 111-141页

作者：陈忠阳张同欣中国人民大学财政金融学院

本文从流动性覆盖率(LCR)监管要求出发,探究商业银行微观行为对货币政策风险承担渠道产生的影响及其作用机制。本文创新性地将LCR监管约束引入DLM的模型框架下,推导出商业银行资产负债结构调整对货币政策传导效率的影响及其作用机制。... 详细信息

本文从流动性覆盖率(LCR)监管要求出发,探究商业银行微观行为对货币政策风险承担渠道产生的影响及其作用机制。本文创新性地将LCR监管约束引入DLM的模型框架下,推导出商业银行资产负债结构调整对货币政策传导效率的影响及其作用机制。在此基础上,采用我国116家商业银行2012—2021年的面板数据进行实证检验。本文发现,货币政策的风险承担渠道在中国显著存在,商业银行的风险承担会对存款准备金率的变动做出负向反馈。LCR监管要求对货币政策传导效率的影响取决于商业银行短期流动性管理行为的选择:商业银行囤积流动性资产将会减弱宽松货币政策带来的风险承担效应,而对融资渠道管理、提高负债质量的行为则会增强宽松货币政策带来的风险承担效应。LCR与净稳定资金比例(NSFR)监管要求和资本监管要求存在显著的交互作用。因此,应合理引导商业银行的流动性管理行为,提高商业银行经营的稳健性、安全性。

关键词：流动性覆盖率货币政策风险承担渠道流动性管理行为

Weak signal detection and adaptive synchronous stability of a novel fifth-order memristive circuit system

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光电子快报:英文版 2023年第7期19卷 391-398页

作者： XIONG Li WANG Xuan ZHANG Xinguo BAI Guangxian chen zhongyang School of Physics and Electromechanical Engineering Hexi UniversityZhangye 734000China School of Information Science and Engineering Dalian Polytechnic UniversityDalian 116034China School of Information Science and Engineering Lanzhou UniversityLanzhou 730000China

This paper is devoted to introduce a novel complex fifth-order memristive circuit system and its applications in synchronous stability and weak signal ***,the typical dynamical behaviors of the memristive system are discussed by chaotic phase portrait,complexity analysis,one-parameter bifurcation and Lyapunov exponent ***,the adaptive control method is applied to realize the synchronization between the drive memristive system(DMS) and the response memristive system(RMS).The results indicate that the synchronization method has strong robustness and anti-interference ***,the weak signal detection of the novel five-dimensional memristive system is realized by using the extreme sensitivity of chaotic system to initial ***,the fifth-order memristive circuit is designed by using basic electronic elements and simulated by Multisim *** the anti-interference ability and sensitivity of the fifth-order memristive circuit are further verified by adding different weak disturbance signals at different positions of the circuit.

关键词： spectrum. system stability

Effect of CeO_(2)on Activity of Catalysts CuO/ZnO/Al_(2)O_(3)/CeO_(2)for Synthesis of Methanol

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中国炼油与石油化工:英文版 2023年第3期25卷 104-114页

作者： Zhou Songhua Li Wenbo Wu Zongjin chen zhongyang Huang chen Zhang Chuanwei Wang Bo Pan Hongyan Lin Qian 无 Guizhou Tianfu Chemical Industry Co. LtdFuquan550501China Department of Chemical Engineering School of Chemistry and Chemical EngineeringGuizhou UniversityGuiyang 550025China Guizhou Key Laboratory for Green Chemical and Clean Energy Technology Guiyang 550025China

The size of the nanoparticles and the number of oxygen vacancies have a significant effect on the catalytic activity of copper-based catalysts used for the synthesis of methanol from *** this study,the authors prepared a series of catalysts CuO/ZnO/Al_(2)O_(3)/CeO_(2)(CZAC)with CuO particles of different sizes and varying number of oxygen vacancies on the surface by changing the added volume of CeO2 by using the co-precipitation *** properties of the catalysts were characterized and their activity was evaluated by using high-pressure fixed-bed reaction *** results showed that the addition of CeO_(2)to CuO/ZnO/Al_(2)O_(3)not only influenced the size of the CuO particles and metal-metal interactions,but also had an effect on the concentrations of oxygen vacancies and strongly basic *** presence of CuO particles of small sizes and a large numbers of oxygen vacancies on the surface of the catalyst were beneficial to its activity for the synthesis of *** catalyst CZAC,when modified by 5%of CeO_(2),recorded CuO particles of the smallest size(8.9 nm),strong intermetallic interactions,and the highest concentrations of oxygen vacancies and strongly basic *** also exhibited the highest catalytic activity,with a space-time yield of methanol of 0.315 g/(h·g)that was higher than that of the enterprise RK-5 catalyst[0.215 g/(h·g)].

关键词： catalyst amount of CeO_(2)added size of CuO particles oxygen vacancies methanol synthesis

State estimation for delayed switched positive systems: delayed radius approach

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Science China(Information Sciences) 2024年第8期67卷 190-205页

作者： Weizhong chen zhongyang FEI Xudong ZHAO Zheng-Guang WU School of Electronics and Information Xi'an Polytechnic University Research Institute of Intelligent Control and Systems Harbin Institute of Technology Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian University of Technology School of Control Science and Engineering Dalian University of Technology State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and ControlZhejiang University

In this paper, an interval estimation scheme is developed for delayed switched positive systems（DSPS） with mode-dependent average dwell time switching. A lossless zonotopic estimation approach is proposed for the delayed intersection zonotope with the positive generator matrix. First, considering the existence of asynchronism between the system mode and the correction matrix mode, the mismatched intersection zonotope is constructed for DSPS to verify the consistency between the system model and ***, by utilizing the introduced radius definitions, the ?∞performance is addressed to optimize the size of delayed intersection zonotopes. Subsequently, we present a joint-design approach of switching signals and the mode-dependent correction matrix by constructing positive generator matrix-based delayed radius functions. Furthermore, guaranteed nonnegative state bounds are derived for the considered DSPS based on the proposed lossless zonotopic estimation criteria. Finally, detailed simulations are conducted to validate the feasibility and superiority of the developed methods.

关键词： delayed switched positive systems interval estimation asynchronous correction matrix zonotopes mode-dependent average dwell time

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基于有限元法的水电站预应力闸墩应力变形分析

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陕西水利 2024年第4期 1-4,8页

作者：陈中阳赵二峰娄一青盛云锋河海大学水利水电学院江苏南京210098 温州市水利电力勘测设计院有限公司浙江温州325000 中国电建集团中南勘测设计研究院有限公司湖南长沙410014

某大型水电站中墩溢流表孔的弧形工作闸门在正常蓄水位时承受巨大水推力,根据规范和工程经验采用预应力钢筋混凝土结构型式,通过建立三维有限元模型进行计算分析,比较闸墩预应力情况下三种典型工况的受力性能。结果表明:闸墩结构具有相... 详细信息

某大型水电站中墩溢流表孔的弧形工作闸门在正常蓄水位时承受巨大水推力,根据规范和工程经验采用预应力钢筋混凝土结构型式,通过建立三维有限元模型进行计算分析,比较闸墩预应力情况下三种典型工况的受力性能。结果表明:闸墩结构具有相当的刚度;应力分布符合一般规律,预应力体系布置合理。

关键词：预应力闸墩有限元锚块预留平孔颈部

Key role of interferon regulatory factor 1(IRF-1)in regulating liver disease:progress and outlook

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第6期25卷 451-470页

作者： Tao chen Shipeng LI Dewen DENG Weiye ZHANG Jianjun ZHANG zhongyang SHEN First Central Clinical School Tianjin Medical UniversityTianjin 300192China Department of Organ Transplant Tianjin First Central HospitalTianjin 300192China Research Institute of Transplant Medicine Nankai UniversityTianjin 300192China Department of Hepatobiliary Surgery Henan Provincial People’s HospitalZhengzhou 450000China Key Laboratory of Organ Transplant Tianjin First Central HospitalTianjin 300192China

Interferon regulatory factor 1(IRF-1)is a member of the IRF *** is the first transcription factor to be identified that could bind to the interferon-stimulated response element(ISRE)on the target gene and displays crucial roles in the interferoninduced signals and ***-1,as an important medium,has all of the advantages of full cell cycle regulation,cell death signaling transduction,and reinforcing immune surveillance,which are well *** studies indicate that IRF-1 is of vital importance to the occurrence and evolution of multifarious liver diseases,including but not limited to inhibiting the replication of the hepatitis virus(A/B/C/E),alleviating the progression of liver fibrosis,and aggravating hepatic ischemiareperfusion injury(HIRI).The tumor suppression of IRF-1 is related to the clinical characteristics of liver cancer patients,which makes it a potential indicator for predicting the prognosis and recurrence of liver cancer;additionally,the latest studies have revealed other effects of IRF-1 such as protection against alcoholic/non-alcoholic fatty liver disease(AFLD/NAFLD),cholangiocarcinoma suppression,and uncommon traits in other liver diseases that had previously received little ***,several compounds and drugs have featured a protective function in specific liver disease models in which there is significant involvement of the IRF-1 *** this paper,we hope to propose a prospective research basis upon which to help decipher translational medicine applications of IRF-1 in liver disease treatment.

关键词： Interferon regulatory factor(IRF-1) Hepatitis virus Liver fibrosis Hepatic ischemia-reperfusion injury(HIRI) Liver cancer