Since China proposed the Belt and Road Initiative （BRI） in late 2013, the impacts of the 21st century Maritime Silk Road （MSR） construction on the South China Sea （SCS） issue become a focal point of both academi...Since China proposed the Belt and Road Initiative （BRI） in late 2013, the impacts of the 21st century Maritime Silk Road （MSR） construction on the South China Sea （SCS） issue become a focal point of both academic research and public concern. There are plenty of divergent opinions on whether the MSR will mean an opportunity for settling the SCS issue, or it will face the challenge of intensified maritime conflicts in this region. This paper first of all analyzes the significance of the BRI in the general picture of China＇s foreign policy. To ensure neighborhood diplomacy be in line with the BRI, China adjusts its SCS policy through rebuilding and consolidating political mutual trust with countries which have been involved into conflicts with China on the SCS issue; meanwhile, China promotes pragmatic cooperation under MSR framework to cultivate positive atmosphere and sense of community with a shared destiny. Both MSR construction and the addressing of the SCS issue are long-term issues, while the MSR provides an innovative approach to surpass existing disputes and focus on regional development cooperation. Hence, the MSR could be an opportunity to accelerate the resolving of maritime disputes.展开更多
A knowledge graph(KG)is a knowledge base that integrates and represents data based on a graph-structured data model or topology.Geoscientists have made efforts to construct geosciencerelated KGs to overcome semantic h...A knowledge graph(KG)is a knowledge base that integrates and represents data based on a graph-structured data model or topology.Geoscientists have made efforts to construct geosciencerelated KGs to overcome semantic heterogeneity and facilitate knowledge representation,data integration,and text analysis.However,there is currently no comprehensive paleontology KG or data-driven discovery based on it.In this study,we constructed a two-layer model to represent the ordinal hierarchical structure of the paleontology KG following a top-down construction process.An ontology containing 19365 concepts has been defined up to 2023.On this basis,we derived the synonymy list based on the paleontology KG and designed corresponding online functions in the OneStratigraphy database to showcase the use of the KG in paleontological research.展开更多
Developing smart iontronic materials is highly desired for eradicating the widely occurring potential short-circuit hazard and subsequent safety problems caused by high ambient humidity.In this work,a humidity-respons...Developing smart iontronic materials is highly desired for eradicating the widely occurring potential short-circuit hazard and subsequent safety problems caused by high ambient humidity.In this work,a humidity-responsive ionogel(HRIG)based on a poly(benzyl methacrylate)matrix swollen by hydrophobic ionic liquid and hygroscopic lithium salt is reported.The HRIG exhibits an anomalous decrease in ionic conductivity upon hydration by increased humidity,totally differing from traditional ionic conductors,which are usually more conductive due to the plasticizing effect of water molecules.This unique ionogel shows a dramatic decrease in ionic conductivity(as much as 10^(2))when exposed to humidity.The conductive pathway within the HRIG would be shut down spontaneously above a critical relative humidity due to water-induced phase separation.Moreover,this transition can be perfectly reversed when the ambient humidity drops.A humidity-responsive smart supercapacitor that can be switched on and off by capturing humidity changes is designed for demonstration.It is believed that such unusual HRIG material will provide new insights into the development and applications of smart iontronics.展开更多
The Carboniferous period lasted about 60 Myr, from ～358.9 Ma to ～298.9 Ma. According to the International Commission on Stratigraphy, the Carboniferous System is subdivided into two subsystems, i.e., Mississippian a...The Carboniferous period lasted about 60 Myr, from ～358.9 Ma to ～298.9 Ma. According to the International Commission on Stratigraphy, the Carboniferous System is subdivided into two subsystems, i.e., Mississippian and Pennsylvanian, including 6 series and 7 stages. The Global Stratotype Sections and Points(GSSPs) of three stages have been ratified, the Tournaisian, Visean, and Bashkirian stages. The GSSPs of the remaining four stages(i.e., the Serpukhovian, Moscovian,Kasimovian, and Gzhelian) have not been ratified so far. This paper outlines Carboniferous stratigraphic subdivision and correlation on the basis of detailed biostratigraphy mainly from South China, and summarizes the Carboniferous chronostratigraphic framework of China. High-resolution biostratigraphic study reveals 37 conodont zones, 24 foraminiferal(including fusulinid) zones, 13 ammonoid zones, 10 brachiopod zones, and 10 rugose coral zones in the Carboniferous of China. The biostratigraphic framework based on these biozones warrants the precise correlation of regional stratigraphy of China(including2 subsystems, 4 series, and 8 stages) to that of the other regions globally. Meanwhile, the Carboniferous chemo-, sequence-,cyclo-, and event-stratigraphy of China have been intensively studied and can also be correlated worldwide. Future studies on the Carboniferous in China should focus on(1) the correlation between shallow-and deep-water facies and between marine and continental facies,(2) high-resolution astronomical cyclostratigraphy, and(3) paleoenvironment and paleoclimate analysis based on geochemical proxies such as strontium and oxygen isotopes, as well as stomatal indices of fossil plants.展开更多
文摘Since China proposed the Belt and Road Initiative （BRI） in late 2013, the impacts of the 21st century Maritime Silk Road （MSR） construction on the South China Sea （SCS） issue become a focal point of both academic research and public concern. There are plenty of divergent opinions on whether the MSR will mean an opportunity for settling the SCS issue, or it will face the challenge of intensified maritime conflicts in this region. This paper first of all analyzes the significance of the BRI in the general picture of China＇s foreign policy. To ensure neighborhood diplomacy be in line with the BRI, China adjusts its SCS policy through rebuilding and consolidating political mutual trust with countries which have been involved into conflicts with China on the SCS issue; meanwhile, China promotes pragmatic cooperation under MSR framework to cultivate positive atmosphere and sense of community with a shared destiny. Both MSR construction and the addressing of the SCS issue are long-term issues, while the MSR provides an innovative approach to surpass existing disputes and focus on regional development cooperation. Hence, the MSR could be an opportunity to accelerate the resolving of maritime disputes.
基金supported by the National Natural Science Foundation of China(Nos.41725007,42250104,41830323,42002015,and 42302001)the Fundamental Research Funds for the Central Universities(Nos.020614380168,JZ2023HGQA0144 and JZ2023HGTA0175)。
文摘A knowledge graph(KG)is a knowledge base that integrates and represents data based on a graph-structured data model or topology.Geoscientists have made efforts to construct geosciencerelated KGs to overcome semantic heterogeneity and facilitate knowledge representation,data integration,and text analysis.However,there is currently no comprehensive paleontology KG or data-driven discovery based on it.In this study,we constructed a two-layer model to represent the ordinal hierarchical structure of the paleontology KG following a top-down construction process.An ontology containing 19365 concepts has been defined up to 2023.On this basis,we derived the synonymy list based on the paleontology KG and designed corresponding online functions in the OneStratigraphy database to showcase the use of the KG in paleontological research.
基金Program for Guangdong Introducing Innovative and Entrepreneurial Teams,Grant/Award Number:2017ZT07C291National Natural Science Foundation of China,Grant/Award Numbers:22078276,22005260,22073094+4 种基金Shenzhen Science and Technology Program,Grant/Award Number:KQTD20170810141424366Shenzhen Key Laboratory of Advanced Materials Product Engineering,Grant/Award Number:ZDSYS20190911164401990Science and Technology Development Program of Jilin Province,Grant/Award Number:20210402059GHScience and Technology Plan Projects of Yunnan Province,Grant/Award Number:202101BC070001-007Presidential Fund,Grant/Award Number:PF01000949。
文摘Developing smart iontronic materials is highly desired for eradicating the widely occurring potential short-circuit hazard and subsequent safety problems caused by high ambient humidity.In this work,a humidity-responsive ionogel(HRIG)based on a poly(benzyl methacrylate)matrix swollen by hydrophobic ionic liquid and hygroscopic lithium salt is reported.The HRIG exhibits an anomalous decrease in ionic conductivity upon hydration by increased humidity,totally differing from traditional ionic conductors,which are usually more conductive due to the plasticizing effect of water molecules.This unique ionogel shows a dramatic decrease in ionic conductivity(as much as 10^(2))when exposed to humidity.The conductive pathway within the HRIG would be shut down spontaneously above a critical relative humidity due to water-induced phase separation.Moreover,this transition can be perfectly reversed when the ambient humidity drops.A humidity-responsive smart supercapacitor that can be switched on and off by capturing humidity changes is designed for demonstration.It is believed that such unusual HRIG material will provide new insights into the development and applications of smart iontronics.
基金supported by the Chinese Academy of Sciences (Grant Nos. XDB26000000, 18000000 and XDPB05)the National Natural Science Foundation of China (Grant No. 41290263)and the Ministry of Science and Technology of China (Grant No. 2013FY111000)
文摘The Carboniferous period lasted about 60 Myr, from ～358.9 Ma to ～298.9 Ma. According to the International Commission on Stratigraphy, the Carboniferous System is subdivided into two subsystems, i.e., Mississippian and Pennsylvanian, including 6 series and 7 stages. The Global Stratotype Sections and Points(GSSPs) of three stages have been ratified, the Tournaisian, Visean, and Bashkirian stages. The GSSPs of the remaining four stages(i.e., the Serpukhovian, Moscovian,Kasimovian, and Gzhelian) have not been ratified so far. This paper outlines Carboniferous stratigraphic subdivision and correlation on the basis of detailed biostratigraphy mainly from South China, and summarizes the Carboniferous chronostratigraphic framework of China. High-resolution biostratigraphic study reveals 37 conodont zones, 24 foraminiferal(including fusulinid) zones, 13 ammonoid zones, 10 brachiopod zones, and 10 rugose coral zones in the Carboniferous of China. The biostratigraphic framework based on these biozones warrants the precise correlation of regional stratigraphy of China(including2 subsystems, 4 series, and 8 stages) to that of the other regions globally. Meanwhile, the Carboniferous chemo-, sequence-,cyclo-, and event-stratigraphy of China have been intensively studied and can also be correlated worldwide. Future studies on the Carboniferous in China should focus on(1) the correlation between shallow-and deep-water facies and between marine and continental facies,(2) high-resolution astronomical cyclostratigraphy, and(3) paleoenvironment and paleoclimate analysis based on geochemical proxies such as strontium and oxygen isotopes, as well as stomatal indices of fossil plants.
