A class of minimal subshifts which display Schweizer-Smital chaos and have zero topotogical entropy is constructed, and it is proved that for a compact system, the positive topological entropy is not generally equival...A class of minimal subshifts which display Schweizer-Smital chaos and have zero topotogical entropy is constructed, and it is proved that for a compact system, the positive topological entropy is not generally equivalent to Schweizer-Smital chaos occurring on the measure centre.展开更多
Spinal cord injury often leads to severe motor and sensory deficits,and prognosis using the currently available therapies remains poor.Therefore,we aimed to explore a novel therapeutic approach for improving the progn...Spinal cord injury often leads to severe motor and sensory deficits,and prognosis using the currently available therapies remains poor.Therefore,we aimed to explore a novel therapeutic approach for improving the prognosis of spinal cord injury.In this study,we implanted oscillating field stimulation devices and transplanted neural stem cells into the thoracic region(T9–T10)of rats with a spinal cord contusion.Basso-Beattie-Bresnahan scoring revealed that oscillating field stimulation combined with neural stem cells transplantation promoted motor function recovery following spinal cord injury.In addition,we investigated the regulation of oscillating field stimulation on the miR-124/Tal1 axis in neural stem cells.Transfection of lentivirus was performed to investigate the role of Tal1 in neurogenesis of neural stem cells induced by oscillating field stimulation.Quantitative reverse transcription-polymerase chain reaction,immunofluorescence and western blotting showed that oscillating field stimulation promoted neurogenesis of neural stem cells in vitro and in vivo.Hematoxylin and eosin staining showed that oscillating field stimulation combined with neural stem cells transplantation alleviated cavities formation after spinal cord injury.Taking the results together,we concluded that oscillating field stimulation decreased miR-124 expression and increased Tal1 content,thereby promoting the neurogenesis of neural stem cells.The combination of oscillating field stimulation and neural stem cells transplantation improved neurogenesis,and thereby promoted structural and functional recovery after spinal cord injury.展开更多
数据作为数字教育时代下的生产要素,是推动教育评价数字化转型的新动力,对于开展规模化评估起着导向和促进作用。过程数据的应用和发展为教育评估中揭示学生的思维过程提供了可能。2023年1月,经济合作与发展组织(Organization for Econo...数据作为数字教育时代下的生产要素,是推动教育评价数字化转型的新动力,对于开展规模化评估起着导向和促进作用。过程数据的应用和发展为教育评估中揭示学生的思维过程提供了可能。2023年1月,经济合作与发展组织(Organization for Economic Co-operation and De-velopment,OECD)发布了《过程数据在大规模教育评估中的应用》报告,该报告提出在规模化教育评估中将过程数据应用于优化设计、解释结果、保障质量、测量表现和验证测试,强调对过程数据应用的有效性验证,以及通过制定道德准则规范过程数据的应用。笔者通过对报告的要点内容进行分析解读,结合数字教育评估的创新发展趋势,提出从建立数字教育评测体系、探索数据化评估模式、践行数智精准评测设计、开展数字教育评测实践、健全数据伦理规范与评估规制等五方面推进数据驱动的规模化教育评估实施方略。展开更多
基金Supported by the National Natural Science Foundation of China(12171335,12301603)the Science Development Project of Sichuan University(2020SCUNL201)the Scientific Foundation of Nanjing University of Posts and Telecommunications(NY221026)。
基金Supported by the National Natural Science Foundation of China(12171335,12301603)the Science Development Project of Sichuan University(2020SCUNL201)the Scientific Foundation of Nanjing University of Posts and Telecommunications(NY221026)。
文摘A class of minimal subshifts which display Schweizer-Smital chaos and have zero topotogical entropy is constructed, and it is proved that for a compact system, the positive topological entropy is not generally equivalent to Schweizer-Smital chaos occurring on the measure centre.
基金supported by the National Natural Science Foundation of China,Nos.81471273(to JQ),and 81472088(to CLS)the Natural Science Research Projects in Colleges and Universities of Anhui Province,No.KJ2020ZD23(to JQ)the Natural Science Foundation of Anhui Province,No.2208085MH210(to JQ)。
文摘Spinal cord injury often leads to severe motor and sensory deficits,and prognosis using the currently available therapies remains poor.Therefore,we aimed to explore a novel therapeutic approach for improving the prognosis of spinal cord injury.In this study,we implanted oscillating field stimulation devices and transplanted neural stem cells into the thoracic region(T9–T10)of rats with a spinal cord contusion.Basso-Beattie-Bresnahan scoring revealed that oscillating field stimulation combined with neural stem cells transplantation promoted motor function recovery following spinal cord injury.In addition,we investigated the regulation of oscillating field stimulation on the miR-124/Tal1 axis in neural stem cells.Transfection of lentivirus was performed to investigate the role of Tal1 in neurogenesis of neural stem cells induced by oscillating field stimulation.Quantitative reverse transcription-polymerase chain reaction,immunofluorescence and western blotting showed that oscillating field stimulation promoted neurogenesis of neural stem cells in vitro and in vivo.Hematoxylin and eosin staining showed that oscillating field stimulation combined with neural stem cells transplantation alleviated cavities formation after spinal cord injury.Taking the results together,we concluded that oscillating field stimulation decreased miR-124 expression and increased Tal1 content,thereby promoting the neurogenesis of neural stem cells.The combination of oscillating field stimulation and neural stem cells transplantation improved neurogenesis,and thereby promoted structural and functional recovery after spinal cord injury.
文摘数据作为数字教育时代下的生产要素,是推动教育评价数字化转型的新动力,对于开展规模化评估起着导向和促进作用。过程数据的应用和发展为教育评估中揭示学生的思维过程提供了可能。2023年1月,经济合作与发展组织(Organization for Economic Co-operation and De-velopment,OECD)发布了《过程数据在大规模教育评估中的应用》报告,该报告提出在规模化教育评估中将过程数据应用于优化设计、解释结果、保障质量、测量表现和验证测试,强调对过程数据应用的有效性验证,以及通过制定道德准则规范过程数据的应用。笔者通过对报告的要点内容进行分析解读,结合数字教育评估的创新发展趋势,提出从建立数字教育评测体系、探索数据化评估模式、践行数智精准评测设计、开展数字教育评测实践、健全数据伦理规范与评估规制等五方面推进数据驱动的规模化教育评估实施方略。