检索结果-南通市图书馆

Stochastic 3D Leray-α model with fractional dissipation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2023年第11期66卷 2589-2614页

作者： shihu li Wei liu Yingchao Xie School of Mathematics and Statistics/Research Institute of Mathematical Science Jiangsu Normal UniversityXuzhou 221116China

In this paper,we establish the global well-posedness of the stochastic 3D Leray-αmodel with general fractional dissipation driven by multiplicative *** model is the stochastic 3D Navier-Stokes equations regularized through a smoothing kernel of orderθ1 in the nonlinear term and theθ2-fractional *** the case ofθ1≥0 andθ2>0 withθ1+θ2≥5/4,we prove the global existence and uniqueness of strong *** main results not only cover many existing works in the deterministic cases,but also generalize some known results of stochastic models such as the stochastic hyperviscous Navier-Stokes equations and classical stochastic3D Leray-αmodel as the special cases.

关键词： stochastic Leray-Q model fractional Laplacian stochastic Navier-Stokes equation well-posedness

Fossil leaves of Berhamniphyllum(Rhamnaceae) from Markam,Tibet and their biogeographic implications

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2020年第2期63卷 224-234页

作者： Zhekun ZHOU Tengxiang WANG Jian HUANG Jia liU Weiyudong DENG shihu li Chenglong DENG Tao SU Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesXishuangbanna 666303China Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650204China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Lancaster Environment Centre Lancaster UniversityLancaster LA14YQUK

A new occurrence of buckthorn fossil leaves is reported from the upper Eocene strata of Markam Basin,southeastern Tibet,*** leaf margin is either entire or slightly *** veins are regularly spaced,forming eucamptodromous *** secondaries exist as straight lines from midvein to near margin and then arch abruptly upward and enter into a margin *** tertiary veins are densely spaced and parallel,and are percurrent to secondary *** leaf architecture conforms with Berhamniphyllum Jones and Dilcher,an extinct fossil genus reported from *** fossils are characterized by their dense secondaries,with secondary veins on the upper half portion of the blade accounting for over 40%of all secondaries.A new species,Berhamniphyllum junrongiae ***,*** et *** ***.,is *** analysis shows that confident assignment among Rhamnidium,Berchemia,and Karwinskia cannot be made based on leaf characters *** might represent an extinct common ancestor of these *** this study,several fossil Berchemia from Yunnan and Shandong are emended and reassigned to Berhamniphyllum.A new complex,namely the Berchemia Complex,is proposed based on morphology,molecular evidence,and the fossil *** complex contains the fossil leaves of Rhamnidium,Karwinskia,Berchemia,and *** historical biogeography of the Berchemia Complex is also discussed in this *** complex might have originated in the late Cretaceous in Colombia,South America,and dispersed to North America via Central America during the ***,the complex moved from North America to East Asia via the Bering Land Bridge no later than the late ***,the complex migrated from North America to Europe via the North Atlantic Land Bridge and then migrated further to *** East Asia,it first appeared in Markam on the Qinghai-Tibetan Plateau,and then dispersed to other regions of Asia.

关键词： Berchemia complex Berhamniphyllum Cenozoic Qinghai-Tibetan Plateau Biogeography

Rapid drift of the Tethyan Himalaya terrane before two-stage India-Asia collision

在线全文

学校读者我要写书评

暂无评论

National Science Review 2021年第7期8卷 86-98页

作者： Jie Yuan Zhenyu Yang Chenglong Deng Wout Krijgsman Xiumian Hu shihu li Zhongshan Shen Huafeng Qin Wei An Huaiyu He lin Ding Zhengtang Guo Rixiang Zhu State Key Laboratory of lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Innovation Academy for Earth Science Chinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences College of Resources Environment and Tourism Capital Normal University Department of Earth Sciences Utrecht University State Key Laboratory of Mineral Deposits Research School of Earth Sciences and Engineering Nanjing University Key Laboratory of Continental Collision and Plateau Uplift Institute of Tibetan Plateau Research Chinese Academy of Sciences Key Laboratory of Cenozoic Geology and Environment Institute of Geology and Geophysics Chinese Academy of Sciences CAS Center for Excellence in life and Paleoenvironment

The India-Asia collision is an outstanding smoking gun in the study of continental collision *** and when the continental collision occurred remains a long-standing *** we present two new paleomagnetic data sets from rocks deposited on the distal part of the Indian passive margin,which indicate that the Tethyan Himalaya terrane was situated at a paleolatitude of ～19.4° S at ～75 Ma and moved rapidly northward to reach a paleolatitude of ～13.7°N at ～61 *** implies that the Tethyan Himalaya terrane rifted from India after ～75 Ma,generating the North India *** document a new two-stage continental collision,first at ～61 Ma between the Lhasa and Tethyan Himalaya terranes,and subsequently at ～53-48 Ma between the Tethyan Himalaya terrane and India,diachronously closing the North India Sea from west to *** scenario matches the history of India-Asia convergence rates and reconciles multiple lines of geologic evidence for the collision.

关键词： India-Asia collision Tethyan Himalaya terrane North India Sea two-stage continental collision

Magnetostratigraphic dating of the Xiashagou Fauna and implication for sequencing the mammalian faunas in the Nihewan Basin,North China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Magnetostratigraphic dating of the Xiashagou Fauna and impli...

Magnetostratigraphy of the Dali Basin in Yunnan and implications for late Neogene rotation of the southeast margin of the Tibetan Plateau

中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： Ping liu Chenglong Deng shihu li Shuhui Cai Hongjiang Cheng Yuan Baoyin Qi Wei Rixiang Zhu State Key Laboratory of lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences Key Laboratory of Computational Geodynamics Chinese Academy of Sciences Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences

The Nihewan Basin sedimentary sequences in northern China are rich in mammalian fossil and Paleolithic sites,thus providing insights into our understanding of Quaternary land mammal biochronology and early human settlements in East *** we present high-resolution magnetostratigraphic results that place stringent age controls on the Xiashagou(XSG) Fauna(that is,the well-known Nihewan Fauna sensu stricto) in Lhe Nihewan Basin,northern China,ResulLs show LhaL Lhe XSG sequence recorded Lhe Brunhes normal chron,the Matuyama reverse chron and the late Gauss normal *** XSG Fauna resides in the Matuyama reverse chron(between the pre-ReuniOn Matuyama chron and the post-Olduvai Matuyama chron),yielding an estimated age of ca.2,2-1.7 *** Pliocene-Pleistocene boundary(Gauss/Matuyama boundary) is locaLed in Lhe lower parL of Lhe XSG *** combination of our sLudy and previously published magnetostratigraphic data suggest that the mammalian fossil Sites in the eastern Nihewan Basin can be placed between the Gauss-Matuyama geomagnetic reversal and the Matuyama-Brunhes geomagnetic reversal(2.58-0.78 Ma),leading to a time range of ca.2.6-0.8 Ma for the Nihewan mammalian faunas.

关键词： Magnetostratigraphy Geochronology Nihewan Basin Nihewan Fauna Xiashagou Fauna Nihewan Formation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Magnetostratigraphy of the Dali Basin in Yunnan and implicat...

中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： shihu li Chenglong Deng Haitao Yao Sheng Huang Chengying liu Huaiyu He Yongxin Pan Rixiang Zhu State Key Laboratory of lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences Key Laboratory of the Earth's Deep Interior Institute of Geology GeophysicsChinese Academy of Sciences University of Chinese Academy of Sciences Institute of Geomechanics Chinese Academy of Geological Sciences

[1]The rotation pattern and fault activity in the southeast margin of the Tibetan Plateau (SEMTP)provide meaningful constraints on the geodynamic evolution of the plateau. However,the lack of Cenozoic paleomagnetic studies and accurate age constraints on Neogene sediments prevents a better understanding of the late Cenozoic tectonic activity in this *** clarify the tectonic rotation pattern and deformation history of the SEMTP,we report new magnetostratigraphic data from a late Neogene sedimentary sequence in the Dali Basin,northwestern Yunnan Province,*** magnetic analyses indicate that both

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

预浸水法在棉山湾水库坝基处理中的应用

中国水利 2009年第16期 28-29页

作者：王付林李世虎宁夏回族自治区固原市水利勘测设计院固原756000

湿陷性黄土在宁夏南部山区分布广泛且土层深厚，在湿陷性黄土地基上修建的库坝为数不少，由于当时资金、地质资料等各种原因，坝基几乎都未加固处理，现在能够正常运行的已很少，多数已成为危坝。人们已深刻认识到湿陷坝基处理的重要性... 详细信息

湿陷性黄土在宁夏南部山区分布广泛且土层深厚，在湿陷性黄土地基上修建的库坝为数不少，由于当时资金、地质资料等各种原因，坝基几乎都未加固处理，现在能够正常运行的已很少，多数已成为危坝。人们已深刻认识到湿陷坝基处理的重要性，开始探索湿陷坝基处理的有效方法。预浸水法是湿陷性黄土地基处理中的一种常用方法。该法是在欲处理地基上筑埂围成浅塘，向塘中注水并保持一定水深，让水充分渗入土中，使土层产生沉陷，消除黄土湿陷性。预浸水法在地基处理中投资低、效果好，应用广泛，但其在坝基处理中应用并不多见，在宁夏也无资料记载。2002年，海原县棉山湾水库工程建设首次用预浸水法对左坝肩一级阶地湿陷坝基进行处理，取得了良好效果。

关键词：湿陷性黄土预浸水法棉山湾水库

Tectonic and sedimentary evolution of the late Miocene–Pleistocene Dali Basin in the southeast margin of the Tibetan Plateau: Evidences from anisotropy of magnetic susceptibility and rock magnetic data

在线全文

学校读者我要写书评

暂无评论

Tectonic and sedimentary evolution of the late Miocene–Plei...

中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： shihu li Chenglong Deng Greig A.Paterson Haitao Yao Sheng Huang Chengying liu Huaiyu He Yongxin Pan Rixiang Zhu State Key Laboratory of lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences Key Laboratory of the Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of Sciences Institute of Geomechanics Chinese Academy of Geological Sciences

The Cenozoic Dali Basin, located at the northeast of Diancang Shan and south of the first bend of Yangtze River, is tectonically controlled by the Dali fault system in the southeast margin of the Tibetan Plateau. The basin is filled with late Miocene to Pleistocene fluviolacustrine sediments, which provide invaluable information about the tectonic deformation and drainage network reorganization in this area. In this study, we discuss the anisotropy of magnetic susceptibility(AMS) of the Dasongping section in the Dali Basin, which spans an interval from 7.6 to1.8 Ma. Although rock magnetic experiments indicate that magnetite and hematite are the main remanence carriers, hysteresis loops, low values of bulk susceptibility and low temperature susceptibility suggest that paramagnetic minerals are major contributors to lowfield AMS. The rock magnetic parameters indicate that the Dali Basin experienced four stages of in filling and the sediment sources may have changed at 4.2 Ma. The clustering of the minimum principle axes(K min) nearly perpendicular to the bedding plane and the pronounced N–S magnetic lineation parallel to the bedding plane indicate that the AMS of the Dali Basin is a superimposed fabric consisting of a sedimentary-compaction and a mild initial deformation overprint. The well-de fined N–S magnetic lineation is likely due to the NNW and NNE oblique shear caused by the Heqing and Red River faults.

关键词： Anisotropy of magnetic susceptibility Dali Basin Southeast margin of the Tibetan Plateau Dali fault system

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

大数据分析在大型活动安保工作中的应用研究

武警学院学报 2019年第1期35卷 25-28,47页

作者：李世虎中国人民警察大学

在大型活动安保工作中,基于现有的公安信息网络,通过获取各种情报信息,并将这些海量信息运用大数据分析方法进行研判,从而形成大型活动安保的防控依据,是加强大型活动安保工作的新思路。大数据分析在大型活动安保工作中的应用主要表现... 详细信息

在大型活动安保工作中,基于现有的公安信息网络,通过获取各种情报信息,并将这些海量信息运用大数据分析方法进行研判,从而形成大型活动安保的防控依据,是加强大型活动安保工作的新思路。大数据分析在大型活动安保工作中的应用主要表现为数据采集与分析、数据预警与决策、后台人工协作等环节,也面临着一些问题和挑战,亟须进一步完善大数据分析应用技术,加强大数据分析应用人才队伍建设,完善大数据分析应用立法。

关键词：大数据大型活动安保分析研判预警

在线全文

学校读者我要写书评

暂无评论

理性—情绪疗法在戒毒工作中的应用及评价

云南警官学院学报 2010年第5期 54-58页

作者：李世虎中国人民武装警察部队学院河北廊坊065000

从近年来的戒毒实践看,理性-情绪疗法需要其他配套措施共同配合,才能起到良好的毒瘾矫治效果。1.在戒断反应期以药物治疗为主,催眠疗法为辅;2.运用引导法帮助吸毒人员逐步对积极健康的事物产生兴趣和依赖;3.针对吸毒人员的人格特征实施... 详细信息

从近年来的戒毒实践看,理性-情绪疗法需要其他配套措施共同配合,才能起到良好的毒瘾矫治效果。1.在戒断反应期以药物治疗为主,催眠疗法为辅;2.运用引导法帮助吸毒人员逐步对积极健康的事物产生兴趣和依赖;3.针对吸毒人员的人格特征实施理性-情绪疗法;4.加强吸毒人员的后期巩固治疗。

关键词：理性-情绪疗法戒毒工作应用