Deep web data integration needs to do schema matching on web query interfaces and obtain the mapping table.By introducing semantic conflicts into web query interface integration and discussing the origins and categori...Deep web data integration needs to do schema matching on web query interfaces and obtain the mapping table.By introducing semantic conflicts into web query interface integration and discussing the origins and categories of the semantic conflicts,an ontology-based schema matching method is proposed.The process of the method is explained in detail using the example of web query interface integration in house domain.Conflicts can be detected automatically by checking semantic relevance degree,then the categories of the conflicts are identified and messages are sent to the conflict solver,which eliminates the conflicts and obtains the mapping table using conflict solving rules.The proposed method is simple,easy to implement and can be flexibly reused by extending the ontology to different domains.展开更多
A differential geometrical method is for the first time used to calculate the effective moduli of a two-phase elastic composite materials with imperfect interface which the inclusions are assumed to be ellipsoidal of ...A differential geometrical method is for the first time used to calculate the effective moduli of a two-phase elastic composite materials with imperfect interface which the inclusions are assumed to be ellipsoidal of revolutions. All of the interface integral items participating in forming the potential and complementary energy functionals of the composite materials are expressed in terms of intrinsic quantities of the ellipsoidal of revolutions. Based on this, the upper and the lower bound for the effective elastic moduli of the composite materials with inclusions described above have been derived. Under three limiting conditions of sphere, disk and needle shaped inclusions, the results of this paper will return to the bounds obtained by Hashin([6]) (1992).展开更多
Electrochemical CO_(2) reduction reaction(CO_(2)RR)offers a promising strategy for CO_(2) conversion into value-added C2+products and facilitates the storage of renewable resources under comparatively mild conditions,...Electrochemical CO_(2) reduction reaction(CO_(2)RR)offers a promising strategy for CO_(2) conversion into value-added C2+products and facilitates the storage of renewable resources under comparatively mild conditions,but still remains a challenge.Herein,we propose the strategy of surface reconstruction and interface integration engineering to construct tuneable Cu^(0)-Cu^(+)-Cu^(2+)sites and oxygen vacancy oxide derived from CeO_(2)/CuO nanosheets(OD-CeO_(2)/CuO NSs)heterojunction catalysts and promote the activity and selectivity of CO_(2)RR.The optimized OD-CeO_(2)/CuO electrocatalyst shows the maximum Faradic efficiencies for C2+products in the H-type cell,which reaches 69.8%at−1.25 V versus a reversible hydrogen electrode(RHE).Advanced characterization analysis and density functional theory(DFT)calculations further confirm the fact that the existence of oxygen vacancies and Cu^(0)-Cu^(+)-Cu^(2+)sites modified with CeO_(2) is conducive to CO_(2) adsorption and activation,enhances the hydrogenation of^(*)CO to^(*)CHO,and further promotes the dimerization of^(*)CHO,thus promoting the selectivity of C2+generation.This facile interface integration and surface reconstruction strategy provides an ideal strategy to guide the design of CO_(2)RR electrocatalysts.展开更多
基金The National Natural Science Foundation of China(No.60673130)the Natural Science Foundation of Shandong Province(No.Y2006G29,Y2007G24,Y2007G38)the Encouragement Fund for Young Scholars of Shandong Province(No.2005BS01002)
文摘Deep web data integration needs to do schema matching on web query interfaces and obtain the mapping table.By introducing semantic conflicts into web query interface integration and discussing the origins and categories of the semantic conflicts,an ontology-based schema matching method is proposed.The process of the method is explained in detail using the example of web query interface integration in house domain.Conflicts can be detected automatically by checking semantic relevance degree,then the categories of the conflicts are identified and messages are sent to the conflict solver,which eliminates the conflicts and obtains the mapping table using conflict solving rules.The proposed method is simple,easy to implement and can be flexibly reused by extending the ontology to different domains.
文摘A differential geometrical method is for the first time used to calculate the effective moduli of a two-phase elastic composite materials with imperfect interface which the inclusions are assumed to be ellipsoidal of revolutions. All of the interface integral items participating in forming the potential and complementary energy functionals of the composite materials are expressed in terms of intrinsic quantities of the ellipsoidal of revolutions. Based on this, the upper and the lower bound for the effective elastic moduli of the composite materials with inclusions described above have been derived. Under three limiting conditions of sphere, disk and needle shaped inclusions, the results of this paper will return to the bounds obtained by Hashin([6]) (1992).
基金Key Specialized Research and Development-International Science and Technology Cooperation Program in Henan Province,Grant/Award Number:231111520500Program for Science&Technology Innovation Talents in Universities of Henan Province,Grant/Award Number:24HASTIT009+2 种基金The 111 Project,Grant/Award Number:D17007National Natural Science Foundation of China,Grant/Award Numbers:52072114,52271176Henan Center for Outstanding Overseas Scientists,Grant/Award Number:GZS2022017。
文摘Electrochemical CO_(2) reduction reaction(CO_(2)RR)offers a promising strategy for CO_(2) conversion into value-added C2+products and facilitates the storage of renewable resources under comparatively mild conditions,but still remains a challenge.Herein,we propose the strategy of surface reconstruction and interface integration engineering to construct tuneable Cu^(0)-Cu^(+)-Cu^(2+)sites and oxygen vacancy oxide derived from CeO_(2)/CuO nanosheets(OD-CeO_(2)/CuO NSs)heterojunction catalysts and promote the activity and selectivity of CO_(2)RR.The optimized OD-CeO_(2)/CuO electrocatalyst shows the maximum Faradic efficiencies for C2+products in the H-type cell,which reaches 69.8%at−1.25 V versus a reversible hydrogen electrode(RHE).Advanced characterization analysis and density functional theory(DFT)calculations further confirm the fact that the existence of oxygen vacancies and Cu^(0)-Cu^(+)-Cu^(2+)sites modified with CeO_(2) is conducive to CO_(2) adsorption and activation,enhances the hydrogenation of^(*)CO to^(*)CHO,and further promotes the dimerization of^(*)CHO,thus promoting the selectivity of C2+generation.This facile interface integration and surface reconstruction strategy provides an ideal strategy to guide the design of CO_(2)RR electrocatalysts.
