TiO2 semiconductive nanoparticles are added into mineral and ester based transformer oil to form semiconductive nanofluids (SNFs) with the aim of enhancing the oil’s insulating performance. Charge accumulation and de...TiO2 semiconductive nanoparticles are added into mineral and ester based transformer oil to form semiconductive nanofluids (SNFs) with the aim of enhancing the oil’s insulating performance. Charge accumulation and decay characteristics of both pure oils and SNFs are measured by pulse electroacoustic (PEA) technique. The result reveals that compared with pure oil, SNFs have more uniform in- ternal electric fields with voltage applied and higher charge decay rate after removing the applied voltage. This is caused by the increase of shallow trap density in SNFs, due to the test results of thermally stimulated current (TSC). It is proposed that the electron trapping and de-trapping processes in shallow traps could be the main charge transport processes in the nanofluid transformer oil.展开更多
目的探究评价脉搏波在运动干预评价体系中作为参数的指示效用,为完善运动干预评价体系提供指导。方法通过网上检索中国知网(CNKI)、Web of Science、Latrobe University Library、PubMed等数据库,搜集运动干预中存在以脉搏波为参数进行...目的探究评价脉搏波在运动干预评价体系中作为参数的指示效用,为完善运动干预评价体系提供指导。方法通过网上检索中国知网(CNKI)、Web of Science、Latrobe University Library、PubMed等数据库,搜集运动干预中存在以脉搏波为参数进行指示的随机对照试验。由5名研究者依据Corhrane评价标准对纳入的文献进行严格质量评价和资料提取,对符合要求的文献采用RevMan 5.3软件进行Meta分析。具体分析指标包括 I^2、P 、CI、MD等。结果共纳入16篇文献,涉及312例对象。Meta分析的结果显示,运动干预对PWV[MD=0.72,95%CI(0.46,0.97), P <0.0001]、AIx [MD=1.97,95%CI(0.75,3.19)、 P =0.002]、PP[MD=2.16,95%CI(0.83,3.49), P =0.001]的影响具有统计学意义。结论脉搏波可以加强反映周身血管功能变化的检验效能,起到较好地完善运动干预评价体系的作用。展开更多
基金Project supported by National Natural Science Foundation of China （51077050）, Chinese Universities Scientific Fund.
文摘TiO2 semiconductive nanoparticles are added into mineral and ester based transformer oil to form semiconductive nanofluids (SNFs) with the aim of enhancing the oil’s insulating performance. Charge accumulation and decay characteristics of both pure oils and SNFs are measured by pulse electroacoustic (PEA) technique. The result reveals that compared with pure oil, SNFs have more uniform in- ternal electric fields with voltage applied and higher charge decay rate after removing the applied voltage. This is caused by the increase of shallow trap density in SNFs, due to the test results of thermally stimulated current (TSC). It is proposed that the electron trapping and de-trapping processes in shallow traps could be the main charge transport processes in the nanofluid transformer oil.
文摘目的探究评价脉搏波在运动干预评价体系中作为参数的指示效用,为完善运动干预评价体系提供指导。方法通过网上检索中国知网(CNKI)、Web of Science、Latrobe University Library、PubMed等数据库,搜集运动干预中存在以脉搏波为参数进行指示的随机对照试验。由5名研究者依据Corhrane评价标准对纳入的文献进行严格质量评价和资料提取,对符合要求的文献采用RevMan 5.3软件进行Meta分析。具体分析指标包括 I^2、P 、CI、MD等。结果共纳入16篇文献,涉及312例对象。Meta分析的结果显示,运动干预对PWV[MD=0.72,95%CI(0.46,0.97), P <0.0001]、AIx [MD=1.97,95%CI(0.75,3.19)、 P =0.002]、PP[MD=2.16,95%CI(0.83,3.49), P =0.001]的影响具有统计学意义。结论脉搏波可以加强反映周身血管功能变化的检验效能,起到较好地完善运动干预评价体系的作用。
