In order to reduce east--west section area of “digital divider” in China, Ministry of Culture laun- ches the National Cultural Information Resources Sharing Project in the mid-west provinces, and the state finance g...In order to reduce east--west section area of “digital divider” in China, Ministry of Culture laun- ches the National Cultural Information Resources Sharing Project in the mid-west provinces, and the state finance gives certain funds subsidy in the project construction period. Embarks highly from strategy during construction plan chosen and operational system management, as while as union digital library to construct a persistent effect mechanism. With the principle of state guidance, enterprise operation and benefit farmers, expand culture industry within the provincial and safeguard Cultural Information Resources Sharing Project sustainable development's, then promotes the rural economy culture full scale development.展开更多
In order to implement the quality of full-time professional degree postgraduate education cultivation,the necessity of building an innovative base for cultivating professional degree postgraduates in civil engineering...In order to implement the quality of full-time professional degree postgraduate education cultivation,the necessity of building an innovative base for cultivating professional degree postgraduates in civil engineering is discussed.Based on the problems ofthe integrated cultivation mode of industry-university-research,the effective mechanism for cultivating an innovative practice base for professional degree postgraduates in civil engineering is elaborated from the construction of the cultivation mode,system construction,daily management,and improvement of the rights and responsibilities of both parties,which provides guiding significance for better realizing the need to adapt to the development of high-level talents in society.展开更多
Projection micro stereolithography(PμSL)has emerged as a powerful three-dimensional(3D)printing technique for manufacturing polymer structures with micron-scale high resolution at high printing speed,which enables th...Projection micro stereolithography(PμSL)has emerged as a powerful three-dimensional(3D)printing technique for manufacturing polymer structures with micron-scale high resolution at high printing speed,which enables the production of customized 3D microlattices with feature sizes down to several microns.However,the mechanical properties of as-printed polymers were not systemically studied at the relevant length scales,especially when the feature sizes step into micron/sub-micron level,limiting its reliable performance prediction in micro/nanolattice and other metamaterial applications.In this work,we demonstrate that PμSL-printed microfibers could become stronger and significantly more ductile with reduced size ranging from 20μm to 60μm,showing an obvious size-dependent mechanical behavior,in which the size decreases to 20μm with a fracture strain up to~100%and fracture strength up to~100 MPa.Such size effect enables the tailoring of the material strength and stiffness of PμSL-printed microlattices over a broad range,allowing to fabricate the microlattice metamaterials with desired/tunable mechanical properties for various structural and functional applications.展开更多
文摘In order to reduce east--west section area of “digital divider” in China, Ministry of Culture laun- ches the National Cultural Information Resources Sharing Project in the mid-west provinces, and the state finance gives certain funds subsidy in the project construction period. Embarks highly from strategy during construction plan chosen and operational system management, as while as union digital library to construct a persistent effect mechanism. With the principle of state guidance, enterprise operation and benefit farmers, expand culture industry within the provincial and safeguard Cultural Information Resources Sharing Project sustainable development's, then promotes the rural economy culture full scale development.
基金Supported by the 2020 Postgraduate Education and Teaching Reform Research Project of Xihua University(YJG2020022):Research on the Long-term Mechanism of Building Innovative Practice Bases for the Cultivation of Full-time Professional Degree PostgraduatesSupported by a project of the Higher Education Research Centre of Xihua University:Research on the path of teacher training in applied undergraduate universities with multi-dimensional synergy(GDJY2019-017)Research on the optimization method of urban underground integrated pipe corridor design based on BIM technology(500247X17007).
文摘In order to implement the quality of full-time professional degree postgraduate education cultivation,the necessity of building an innovative base for cultivating professional degree postgraduates in civil engineering is discussed.Based on the problems ofthe integrated cultivation mode of industry-university-research,the effective mechanism for cultivating an innovative practice base for professional degree postgraduates in civil engineering is elaborated from the construction of the cultivation mode,system construction,daily management,and improvement of the rights and responsibilities of both parties,which provides guiding significance for better realizing the need to adapt to the development of high-level talents in society.
基金the financial support from Shenzhen Science and Technology Innovation Committee under the Grant Nos. JCYJ20170818103206501, Type C 202011033000145Changsha Municipal Science and Technology Bureau Project kh2201035supported by the City University of Hong Kong under the Grant No. 9667226
文摘Projection micro stereolithography(PμSL)has emerged as a powerful three-dimensional(3D)printing technique for manufacturing polymer structures with micron-scale high resolution at high printing speed,which enables the production of customized 3D microlattices with feature sizes down to several microns.However,the mechanical properties of as-printed polymers were not systemically studied at the relevant length scales,especially when the feature sizes step into micron/sub-micron level,limiting its reliable performance prediction in micro/nanolattice and other metamaterial applications.In this work,we demonstrate that PμSL-printed microfibers could become stronger and significantly more ductile with reduced size ranging from 20μm to 60μm,showing an obvious size-dependent mechanical behavior,in which the size decreases to 20μm with a fracture strain up to~100%and fracture strength up to~100 MPa.Such size effect enables the tailoring of the material strength and stiffness of PμSL-printed microlattices over a broad range,allowing to fabricate the microlattice metamaterials with desired/tunable mechanical properties for various structural and functional applications.
