High-frequency electromagnetic waves and electronic products can bring great convenience to people’s life,but lead to a series of electromagnetic interference(EMI)problems,such as great potential dangers to the norma...High-frequency electromagnetic waves and electronic products can bring great convenience to people’s life,but lead to a series of electromagnetic interference(EMI)problems,such as great potential dangers to the normal operation of elec-tronic components and human safety.Therefore,the research of EMI shield-ing materials has attracted extensive attention by the scholars.Among them,polymer-based EMI shielding materials with light weight,high specific strength,and stable properties have become the current mainstream.The construction of 3D conductive networks has proved to be an effective method for the prepara-tion of polymer-based EMI shielding materials with excellent shielding effective-ness(SE).In this paper,the shielding mechanism of polymer-based EMI shield-ing materials with 3D conductive networks is briefly introduced,with emphasis on the preparation methods and latest research progress of polymer-based EMI shielding materials with different 3D conductive networks.The key scientific and technical problems to be solved in the field of polymer-based EMI shielding materials are also put forward.Finally,the development trend and application prospects of polymer-based EMI shielding materials are prospected.展开更多
采用全英文教学的课程体系和教学模式是中国高等教育国际化的一个重要途径。在EMI(English Medium Instruction)教学环境中,英语是一种表达与交流的媒介;作为专业知识的载体,用于建构和分析专业知识。本研究认为,学习者的综合认知水平...采用全英文教学的课程体系和教学模式是中国高等教育国际化的一个重要途径。在EMI(English Medium Instruction)教学环境中,英语是一种表达与交流的媒介;作为专业知识的载体,用于建构和分析专业知识。本研究认为,学习者的综合认知水平与英语能力较大地制约了EMI教学的效果。英语基础薄弱的学生把注意力集中于试图理解英语语言的含义,就会损失较多的专业知识;对于具备了较好英语基础、具有较高主观能动性的学生,EMI课程会起到很强的推动和促进作用。展开更多
基金Foundation of National Natural Science Foundation of China,Grant/Award Number:51903145Natural Science Basic Research Plan for Distinguished Young Scholars in Shaanxi Province of China,Grant/Award Number:2019JC-11Wang L.would like to thank the Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University,Grant/Award Number:CX202053。
文摘High-frequency electromagnetic waves and electronic products can bring great convenience to people’s life,but lead to a series of electromagnetic interference(EMI)problems,such as great potential dangers to the normal operation of elec-tronic components and human safety.Therefore,the research of EMI shield-ing materials has attracted extensive attention by the scholars.Among them,polymer-based EMI shielding materials with light weight,high specific strength,and stable properties have become the current mainstream.The construction of 3D conductive networks has proved to be an effective method for the prepara-tion of polymer-based EMI shielding materials with excellent shielding effective-ness(SE).In this paper,the shielding mechanism of polymer-based EMI shield-ing materials with 3D conductive networks is briefly introduced,with emphasis on the preparation methods and latest research progress of polymer-based EMI shielding materials with different 3D conductive networks.The key scientific and technical problems to be solved in the field of polymer-based EMI shielding materials are also put forward.Finally,the development trend and application prospects of polymer-based EMI shielding materials are prospected.
文摘采用全英文教学的课程体系和教学模式是中国高等教育国际化的一个重要途径。在EMI(English Medium Instruction)教学环境中,英语是一种表达与交流的媒介;作为专业知识的载体,用于建构和分析专业知识。本研究认为,学习者的综合认知水平与英语能力较大地制约了EMI教学的效果。英语基础薄弱的学生把注意力集中于试图理解英语语言的含义,就会损失较多的专业知识;对于具备了较好英语基础、具有较高主观能动性的学生,EMI课程会起到很强的推动和促进作用。
