检索结果-南通市图书馆

Fudan Journal of the Humanities and social sciences 2014年第3期7卷 503-507页

作者： Jiangnan Zhu Department of Politics and Public Administration Faculty of Social Sciences The University ofHong Kong The Jockey Club Tower Centennial Campus HKU Pokfulam Road Hong KongChina

The progressive political thought or the political progressivism in America was a nationally complex and diverse current of thought in America at the end of the 19th century and the beginning of the 20th century. Facing up with many social grievances which resulted from the fast industrialization, the outdated political philosophy of the Founding Fathers, and the radical thoughts imported from overseas, the progressives purposively and systematically resorted to diverse powers, especially governmental power,

关键词：政治思想进步主义科学出版社美国 ISBN 社会学习中国

Do Institutional Investor Cliques Undermine Stock Price Efficiency?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

china & World Economy 2025年第1期33卷 223-258页

作者： Hai Jiang Shuangyi Chen Zifeng Wang School of Economics Jinan UniversityChina Dongguan Academy of social sciences China

This study investigates the effects of institutional investor cliques on stock price efficiency. Using a community network algorithm, it identifies cliques of institutional investors and finds that they significantly undermined stock price efficiency in china. The robustness of this finding is demonstrated through a range of methodologies, including the substitution of dependent variables, the alteration of estimation methods, the exclusion of data from extreme market periods, and the application of instrumental variables. The role of institutional investor cliques in diminishing market efficiency is attributed to market speculation. The detrimental effect of cliques on efficiency is exacerbated in environments characterized by low stock liquidity, poor information disclosure, and heightened panic among retail investors. However, regulatory interventions, such as inquiry letters, are shown to mitigate these effects and enhance market efficiency. These findings highlight the unexpected ways institutional investor cliques can influence emerging market economies and underscore the critical importance of effective regulation to safeguard market efficiency.

关键词： emerging market economics institutional investor clique stock pric efficiency

Adoption and adaption:the rise of Pb-Ba glass underlines the impact of soda glass along the pre-Silk Road

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 Bulletin 2025年第2期70卷 172-175页

作者： Siwen Xu Yunbing Luo Zhiheng Li Yemao Hou Nian Liu Yimin Yang Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of SciencesBeijing 100044China Department of Archaeology and Anthropology University of Chinese Academy of SciencesBeijing 100049China Hubei Provincial Institute of Cultural Relics and Archaeology Wuhan 430077China Institute of Archaeology Chinese Academy of Social SciencesBeijing 100101China

Glass is one of the most significant synthetic materials in human *** the early Iron Age,the Mediterranean became famous for natron soda-lime glass(m-Na-Ca)with low levels of magnesium and *** contrast,Mesopotamia gained renown for plant ash soda-lime glass(v-Na-Ca).South and Southeast Asia were celebrated for mineral soda-alumina glass(m-Na-Al)and mineral potash glass,whereas china was wellknown for its expertise in crafting lead-barium glass and mineral potash glass.

关键词： glass magnesium gained

Regional tendencies of research collaboration of social sciences in china:Analysis based on papers of economic journals

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Library and Information Science 2014年第1期7卷 31-45页

作者： Jinyan SU Center for Documentation and Information Chinese Academy of Social Sciences

Purpose:This study intends to evaluate the regional tendencies of research collaboration of social sciences in china,and shows the pattern of china’s inter-regional research collaboration(IRRC).Design/methodology/approach:By using 10 years’ data of 150 economic journals in CNKI database,this paper used the Salton index as the indicator to measure the collaborative intensity of 31 regions in ***:First,regional tendencies of research collaboration in social sciences do exist in ***,there is a positive correlation between collaborative tendency and regional scientific *** region would like to cooperate with high productive regions,and high productive regions tend to have collaborations within the region ***,geographical proximity is an important factor affecting china’s *** limitations:There are many other important external conditions which may affect research collaboration,but not all of them have been taken into account in this *** implications:The proposed method can be also applied to detect cooperation preference of different authors,scientific research institutions and *** the study will help us understand the importance of distance in scholarly ***/value:Previous researches proved that regional research collaborations exist in natural sciences in china,while this research showed that the same phenomenon also appears in social sciences in china.

关键词： Research collaboration Regional tendency Scientific productivity Physical distance

Broomcorn millet cultivation in the SW East European Plain since the second millennium BC

在线全文

学校读者我要写书评

暂无评论

Science china Earth sciences 2025年第2期68卷 487-497页

作者： Ting AN Luoya ZHU Jie TIAN Chenghao WEN Meng YANG Hongxing HAO Magda LAZAROVICI Gheorghe LAZAROVICI School of Art and Archaeology Zhejiang UniversityHangzhou 310028China Institute of Archaeology Chinese Academy of Social SciencesBeijing 100101China Zhengzhou Institute of Cultural Relics and Archaeology Zhengzhou 450007China Institute of Archaeology Iasi Iasi 700505Romania

The early trans-Eurasian exchange and its influence on the dynamics of human-land relationships is an emerging topic involving multiple *** southwestern part of the Eastern European Plain was a key hub for early East-West *** millet,a crop domesticated in china,was introduced into the region about 3,600 years ago,significantly earlier than in other parts of *** research employs systematic archaeobotanical flotation and AMS radiocarbon dating at two sites in Romania:Baia-?n Muchie and Dobrov??.The findings demonstrate that broomcorn millet cultivation in this region has persisted for over 2,000 years,exhibiting significant diachronic *** was most intensively utilized during the Late Bronze Age to the Early Iron Age(1200–800 BC)and the Late Roman Empire(AD 250–400),periods which were characterized by rapid climatic *** may have been cultivated as a“disaster relief”crop to mitigate the challenges posed by extreme drought and *** millet grains from the study area are similar in dimensions to those reported in East Asia;however,grains from the Romanian sites are thinner and *** route traversing the Caucasus and the northern Black Sea likely served as a key passage through which millet entered Europe from West *** research provides valuable data on the chronology of millet cultivation in the SW Eastern European Plain and enhances our understanding of early East-West exchanges and their impact on human-environment interactions in critical regions.

关键词： Archaeobotany Millet agriculture Trans-Eurasian exchange Bronze Age SW East European Plain

同方期刊数据库

Application of FTIR two-dimensional correlation spectroscopy(2D-COS)analysis in characterizing environmental behaviors of microplastics:A systematic review

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental sciences 2025年第1期147卷 200-216页

作者： Shuang Peng Feipeng Wang Dongbin Wei Cuiping Wang Haijun Ma Yuguo Du Research Center for Eco-Environmental sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of sciences Beijing 100049China North Minzu University Yinchuan 750001China

Microplastics(MPs)are ubiquitous in the environment,continuously undergo aging processes and release toxic chemical *** the environmental behaviors of MPs is critical to accurately evaluate their long-term ecological *** twodimensional correlation spectroscopy(2D-COS)is a powerful tool for MPs studies,which can dig more comprehensive information hiding in the conventional one-dimensional spectra,such as infrared(IR)and Raman *** recent applications of 2D-COS in analyzing the behaviors and fates of MPs in the environment,including their aging processes,and interactions with natural organicmatter(NOM)or other chemical substances,were summarized *** main requirements and limitations of current approaches for exploring these processes are discussed,and the corresponding strategies to address these limitations and drawbacks are proposed as ***,new trends of 2D-COS are prospected for analyzing the properties and behaviors of MPs in both natural and artificial environmental processes.

关键词： Microplastics(MPs) 2D-COS application Aging processes Interactions

Tetrahedron constellation of gravitational wave observatory

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(Physics,Mechanics & Astronomy) 2025年第2期68卷 86-93页

作者： Hong-Bo Jin Cong-Feng Qiao National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China International Centre for Theoretical Physics Asia-Pacific University of Chinese Academy of SciencesBeijing 100190China School of Physical sciences University of Chinese Academy of SciencesBeijing 100049China

For the first time,we have introduced the tetrahedron constellation of gravitational wave observatory(TEGO)composed of four identical spacecrafts(S/Cs).The laser telescopes and their pointing structures are mounted on the S/C platform and are evenly distributed at three locations 120 degrees *** structures form automatically a stable mass center for the *** time delay interferometry(TDI)is used to suppress the frequency noise of gravitational wave(GW)*** unequal-arm Michelson TDI configuration and the Sagnac TDI configuration are equally effective at eliminating the laser frequency noise based on the TEGO ***,compared with the configurations of LISA,Taiji,and Tian Qin,the TEGO has more combinations of optical paths in its TDI system sensitive to GW *** six arms of TEGO are simultaneously sensitive to the six polarization modes of *** sensitivity implies that GW modes beyond the predictions of general relativity(GR)can be detected *** instance,a scalar longitudinal mode of GWs,which is not predicted by GR,has been identified as a dominant polarization *** mode is found to be evident in the response amplitudes of the TEGO arms,such as between S/C1 and S/C4,and S/C3 and S/C4,at certain orbital positions.

关键词： gravitational wave detectors and experiments gravitational waves experimental tests of gravitational theories experimental studies of gravity

同方期刊数据库

How sediment dredging alters phosphorus dynamics in a lowland rural river?

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental sciences 2025年第1期147卷 189-199页

作者： Qimou Zhang Jiacong Huang Yulai Ji Jing Zhang Shuai Zhang Junfeng Gao Key Laboratory of Watershed Geographic sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of sciences Beijing 10094China

china’s lowland rural rivers are facing severe eutrophication problems due to excessive phosphorus(P)from anthropogenic ***,quantifying P dynamics in a lowland rural river is challenging due to its complex interaction with surrounding areas.A P dynamic model(River-P)was specifically designed for lowland rural rivers to address this *** modelwas coupled with the Environmental Fluid Dynamics Code(EFDC)and the Phosphorus Dynamic Model for lowland Polder systems(PDP)to characterize P dynamics under the impact of dredging in a lowland rural *** on a two-year(2020-2021)dataset from a representative lowland rural river in the Lake Taihu Basin,china,the coupled model was calibrated and achieved a model performance(R^(2)>0.59,RMSE<0.04 mg/L)for total P(TP)*** research in the study river revealed that(1)the time scale for the effectiveness of sediment dredging for P control was~300 days,with an increase in P retention capacity by 74.8 kg/year and a decrease in TP concentrations of 23%after dredging.(2)Dredging significantly reduced P release from sediment by 98%,while increased P resuspension and settling capacities by 16%and 46%,respectively.(3)The sediment-water interface(SWI)plays a critical role in P transfer within the river,as resuspension accounts for 16%of TP imports,and settling accounts for 47%of TP *** the large P retention capacity of lowland rural rivers,drainage ditches and ponds with macrophytes are promising approaches to enhance P retention *** study provides valuable insights for local environmental departments,allowing a comprehensive understanding of P dynamics in lowland rural *** enable the evaluation of the efficacy of sediment dredging in P control and the implementation of corresponding P control measures.

关键词： Lowland rural river Phosphorus Sediment dredging Model ensemble Retention capacity

Sky location of massive black hole binaries in the foreground of Galactic white dwarf binaries

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(Physics,Mechanics & Astronomy) 2025年第1期68卷 93-104页

作者： Pan Guo Hong-Bo Jin Cong-Feng Qiao Yue-Liang Wu The International Centre for Theoretical Physics Asia-Pacific University of Chinese Academy of SciencesBeijing 100190China Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China The School of Physical sciences University of Chinese Academy of SciencesBeijing 100049China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China

For space-based gravitational wave(GW)detection,the main noise source for massive black hole binaries(MBHBs)is attributed to approximately 107 double white dwarf binaries in the *** a GW source,the amplitude of the detector response,recorded by a space-based gravitational wave detector,exhibits a modulation effect with a year period when observing the source from various orbital *** the adverse conditions mentioned above,where there is a strong foreground noise and annual modulation in the signals,we employed the wavelet transform and the strong-amplitude relevant orbital position search methods,which allows the weak MBHB sources to achieve higher locating *** detail,for two MBHB sources of lower intensity,the precision of luminosity distance,represented by the ratioΔD_(L)/D_(L) at the 95%confidence level,is enhanced by factors of∼*** angular resolutions,denoted byΔΩs,are enhanced by a factor of∼*** improvements increase the number of detectable GW sources,facilitate multi-messenger follow-up observations and provide constraints on the cosmological constant.

关键词： space-based gravitational wave detection gravitational waves massive black hole binaries

Mechanistic insight on nanomaterial-induced reactive oxygen species formation

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental sciences 2025年第5期151卷 200-210页

作者： Jianzhong Cao Qingchun Wu Xuting Liu Xiangyu Zhu Chunfeng Huang Xinyu Wang Yang Song State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of sciences Beijing 100049China

Reactive oxygen species(ROS)are closely related to cell death,proliferation and ***,excessive ROS levels may exceed the cellular oxidative capacity and cause irreversible *** are often inadvertently exposed to nanomaterials(NMs).Therefore,elucidating the specific routes of ROS generation induced by NMs is crucial for comprehending the toxicity mechanisms of NMs and regulating their potential *** paper provides a comprehensive review of the toxicity mechanisms and applications of NMs from three perspectives:(1)Organelle *** the impact of NMmediated ROS onmitochondria,unravelingmechanisms at the organelle level.(2)NMs’*** the broad applications and biosafety considerations of Nanozymes,a unique class of NMs.(3)Cellular *** the toxic effects and mechanisms of NMs in cells at a holistic cellular *** on these perspectives,the paper scrutinizes the regulation of Fenton reactions by NMs in ***,it introduces diseases resulting fromNM-mediated ROS at the organism *** comprehensive review aims to provide valuable insights for studying NM-mediated mechanisms at both cellular and organism levels,offering considerations for the safe design of nanomaterials.

关键词： Nanomaterials Reactive oxygen species(ROS) Toxicity Mitochondria Oxidative stress