Thematic art creation is a product of a complex social,historical,and cultural context,and it fills an important position in the development of modern and contemporary Chinese art history.Since the 21st century,with t...Thematic art creation is a product of a complex social,historical,and cultural context,and it fills an important position in the development of modern and contemporary Chinese art history.Since the 21st century,with the introduction and implementation of a series of national major thematic art creation projects,thematic art creation has gradually moved from a marginal position in art history to a core area,becoming a visual narrative method with independent aesthetic value.Moving towards cultural consciousness and carrying cultural self-confidence,thematic art creation requires the guidance,standardization,and support of related art theories.The lack and absence of theoretical research restricts the development of thematic art creation.This study combs through the research results and literature materials of thematic art creation since the new century as well as studies the aesthetic education value of thematic art creation image narration.展开更多
Until the advent of phylogenomics,the atypical morphology of extant represen-tatives of the insect orders Grylloblattodea(ice-crawlers)and Mantophasmatodea(gladi-ators)had confounding effects on efforts to resolve the...Until the advent of phylogenomics,the atypical morphology of extant represen-tatives of the insect orders Grylloblattodea(ice-crawlers)and Mantophasmatodea(gladi-ators)had confounding effects on efforts to resolve their placement within Polyneoptera.This recent research has unequivocally shown that these species-poor groups are closely related and form the clade Xenonomia.Nonetheless,divergence dates of these groups re-main poorly constrained,and their evolutionary history debated,as the few well-identified fossils,characterized by a suite of morphological features similar to that of extant forms,are comparatively young.Notably,the extant forms of both groups are wingless,whereas most of the pre-Cretaceous insect fossil record is composed of winged insects,which represents a major shortcoming of the taxonomy.Here,we present new specimens em-bedded in mid-Cretaceous amber from Myanmar and belonging to the recently described species Aristovia danili.The abundant material and pristine preservation allowed a de-tailed documentation of the morphology of the species,including critical head features.Combined with a morphological data set encompassing all Polyneoptera,these new data unequivocally demonstrate that A.danili is a winged stem Grylloblattodea.This discov-ery demonstrates that winglessness was acquired independently in Grylloblattodea and Mantophasmatodea.Concurrently,wing apomorphic traits shared by the new fossil and earlier fossils demonstrate that a large subset of the former Protorthoptera"assemblage,representing a third of all known insect species in some Permian localities,are genuine representatives of Xenonomia.Data from the fossil record depict a distinctive evolution-ary trajectory,with the group being both highly diverse and abundant during the Permian but experiencing a severe decline from the Triassic onwards.展开更多
Light utilization is one of the key factors for the improvement of photocatalytic perfo rmance.He rein,we design C-TiO_(2) hollow nanoshells with strong Mie resonance for enhanced photocatalytic hydrogen evolution in ...Light utilization is one of the key factors for the improvement of photocatalytic perfo rmance.He rein,we design C-TiO_(2) hollow nanoshells with strong Mie resonance for enhanced photocatalytic hydrogen evolution in a dye-sensitized system under visible light irradiation(λ≥420 nm).By tuning the inner diameters of hollow nanoshells,the Mie resonance in hollow nanoshells is adjusted for better excitation of dye molecules,which thus greatly enhances the light utilization in visible light region.This work shows the potential of Mie resonance in nanoshells can be an alternative strategy to increase the light utilization for photocatalysis.展开更多
文摘Thematic art creation is a product of a complex social,historical,and cultural context,and it fills an important position in the development of modern and contemporary Chinese art history.Since the 21st century,with the introduction and implementation of a series of national major thematic art creation projects,thematic art creation has gradually moved from a marginal position in art history to a core area,becoming a visual narrative method with independent aesthetic value.Moving towards cultural consciousness and carrying cultural self-confidence,thematic art creation requires the guidance,standardization,and support of related art theories.The lack and absence of theoretical research restricts the development of thematic art creation.This study combs through the research results and literature materials of thematic art creation since the new century as well as studies the aesthetic education value of thematic art creation image narration.
基金This work was supported by the National Natural Science Foundation of China(no.42272004,42288201,32020103006).
文摘Until the advent of phylogenomics,the atypical morphology of extant represen-tatives of the insect orders Grylloblattodea(ice-crawlers)and Mantophasmatodea(gladi-ators)had confounding effects on efforts to resolve their placement within Polyneoptera.This recent research has unequivocally shown that these species-poor groups are closely related and form the clade Xenonomia.Nonetheless,divergence dates of these groups re-main poorly constrained,and their evolutionary history debated,as the few well-identified fossils,characterized by a suite of morphological features similar to that of extant forms,are comparatively young.Notably,the extant forms of both groups are wingless,whereas most of the pre-Cretaceous insect fossil record is composed of winged insects,which represents a major shortcoming of the taxonomy.Here,we present new specimens em-bedded in mid-Cretaceous amber from Myanmar and belonging to the recently described species Aristovia danili.The abundant material and pristine preservation allowed a de-tailed documentation of the morphology of the species,including critical head features.Combined with a morphological data set encompassing all Polyneoptera,these new data unequivocally demonstrate that A.danili is a winged stem Grylloblattodea.This discov-ery demonstrates that winglessness was acquired independently in Grylloblattodea and Mantophasmatodea.Concurrently,wing apomorphic traits shared by the new fossil and earlier fossils demonstrate that a large subset of the former Protorthoptera"assemblage,representing a third of all known insect species in some Permian localities,are genuine representatives of Xenonomia.Data from the fossil record depict a distinctive evolution-ary trajectory,with the group being both highly diverse and abundant during the Permian but experiencing a severe decline from the Triassic onwards.
基金Financial support for this project was provided by the National Natural Science Foundation of China (Nos.51702023,51702022)Natural Science Research of Jiangsu Higher Education Institutions of China (No.17KJB430001)。
文摘Light utilization is one of the key factors for the improvement of photocatalytic perfo rmance.He rein,we design C-TiO_(2) hollow nanoshells with strong Mie resonance for enhanced photocatalytic hydrogen evolution in a dye-sensitized system under visible light irradiation(λ≥420 nm).By tuning the inner diameters of hollow nanoshells,the Mie resonance in hollow nanoshells is adjusted for better excitation of dye molecules,which thus greatly enhances the light utilization in visible light region.This work shows the potential of Mie resonance in nanoshells can be an alternative strategy to increase the light utilization for photocatalysis.
