随着显示技术的不断发展,对高性能、高稳定性的薄膜晶体管(Thin Film Transistor,TFT)的需求日趋增加,通过结晶改善薄膜晶体管性能的方法受到大量关注。当前,铟镓锌氧化物(IGZO)材料由于具有迁移率高、柔性好、透明度高等优势,被广泛用...随着显示技术的不断发展,对高性能、高稳定性的薄膜晶体管(Thin Film Transistor,TFT)的需求日趋增加,通过结晶改善薄膜晶体管性能的方法受到大量关注。当前,铟镓锌氧化物(IGZO)材料由于具有迁移率高、柔性好、透明度高等优势,被广泛用于薄膜晶体管的沟道中,而改善IGZO沟道层的结晶形态也成为研究热点。本文总结了晶态IGZO薄膜晶体管器件的研究进展,详细介绍了IGZO系化合物的晶体结构,重点阐述了单晶、c轴取向结晶、六方多晶型、尖晶石型、纳米晶型和原生结晶型IGZO的结构和各晶态IGZO薄膜晶体管的制备方法、器件性能和稳定性,深入分析其微观结构,总结物理特性,阐述不同晶系结构的结晶机理,建立不同晶体结构与电学特性的关系,最后对晶态IGZO薄膜晶体管的发展进行展望。展开更多
胰岛素基础率是人工胰腺系统实现人体血糖闭环控制的基准,但该变量在临床治疗中难以准确确定.针对这一问题,本文设计了一种基于胰岛素基础率动态估计的人工胰腺自抗扰控制方法,通过扩张状态观测器(Extended state observer,ESO)实时估...胰岛素基础率是人工胰腺系统实现人体血糖闭环控制的基准,但该变量在临床治疗中难以准确确定.针对这一问题,本文设计了一种基于胰岛素基础率动态估计的人工胰腺自抗扰控制方法,通过扩张状态观测器(Extended state observer,ESO)实时估计血糖代谢过程中的内部与外界干扰,构建具备参数自适应能力的反馈控制律和胰岛素注射安全约束,实现血糖闭环调控能力的有效改善.在此基础上,本文设计了基于移动设备和蓝牙模块的人工胰腺软件系统,并通过美国食品药品监督管理局(Food and Drug Administration,FDA)接受的UVA/Padova T1DM仿真平台完成算法的比较仿真与功能测试.本文的工作将为后续人工胰腺临床试验的开展提供方法基础和技术支持,也为我国糖尿病患者血糖管理的改善提供精准医学治疗手段.展开更多
To examine the chilling resistance of a newly developed super hybrid rice （Oryza sativa） Liangyou 122 at the different temperatures, an experiment was conducted to investigate the photosynthetic pigments contents, c...To examine the chilling resistance of a newly developed super hybrid rice （Oryza sativa） Liangyou 122 at the different temperatures, an experiment was conducted to investigate the photosynthetic pigments contents, changes in fatty acids content of thylakoid membrane and the activities of several anti-oxidative enzymes at milky stage with traditional hybrid rice Shanyou 63 as control, by growing rice under the 25/15℃ and 25/20℃ day/night temperature. The results showed that the malondialdehyde（MDA） content and superoxide anion（O2^-·） were increased remarkably, while the activities of superoxide dismutase（SOD） and catalase（CAT） were obviously decreased with the duration of low temperature treatment. Moreover, the change enhanced with the increased difference between day and night temperatures. Meanwhile, the index of unsaturated fatty acid （IUFA） of both varieties also increased. As a result, the photosynthetic rate and the chlorophyll content were decreased considerably, while at beginning the carotenoids content increased and then decreased. Of all the parameters investigated, the variation range In Llangyou 122 was less than that in Shanyou 63, but the values of the former were more than the latter, which means that Llangyou 122 may be more resistant to chilling temperature at the milky stage.展开更多
文摘随着显示技术的不断发展,对高性能、高稳定性的薄膜晶体管(Thin Film Transistor,TFT)的需求日趋增加,通过结晶改善薄膜晶体管性能的方法受到大量关注。当前,铟镓锌氧化物(IGZO)材料由于具有迁移率高、柔性好、透明度高等优势,被广泛用于薄膜晶体管的沟道中,而改善IGZO沟道层的结晶形态也成为研究热点。本文总结了晶态IGZO薄膜晶体管器件的研究进展,详细介绍了IGZO系化合物的晶体结构,重点阐述了单晶、c轴取向结晶、六方多晶型、尖晶石型、纳米晶型和原生结晶型IGZO的结构和各晶态IGZO薄膜晶体管的制备方法、器件性能和稳定性,深入分析其微观结构,总结物理特性,阐述不同晶系结构的结晶机理,建立不同晶体结构与电学特性的关系,最后对晶态IGZO薄膜晶体管的发展进行展望。
文摘胰岛素基础率是人工胰腺系统实现人体血糖闭环控制的基准,但该变量在临床治疗中难以准确确定.针对这一问题,本文设计了一种基于胰岛素基础率动态估计的人工胰腺自抗扰控制方法,通过扩张状态观测器(Extended state observer,ESO)实时估计血糖代谢过程中的内部与外界干扰,构建具备参数自适应能力的反馈控制律和胰岛素注射安全约束,实现血糖闭环调控能力的有效改善.在此基础上,本文设计了基于移动设备和蓝牙模块的人工胰腺软件系统,并通过美国食品药品监督管理局(Food and Drug Administration,FDA)接受的UVA/Padova T1DM仿真平台完成算法的比较仿真与功能测试.本文的工作将为后续人工胰腺临床试验的开展提供方法基础和技术支持,也为我国糖尿病患者血糖管理的改善提供精准医学治疗手段.
基金National Natural Science Foundation of China （No. 30270792） Natural Science Foundation of Jiangsu Province, China （No. BK2004143） the Key Project of Ministry of Education, China （No. 204049）.
文摘To examine the chilling resistance of a newly developed super hybrid rice （Oryza sativa） Liangyou 122 at the different temperatures, an experiment was conducted to investigate the photosynthetic pigments contents, changes in fatty acids content of thylakoid membrane and the activities of several anti-oxidative enzymes at milky stage with traditional hybrid rice Shanyou 63 as control, by growing rice under the 25/15℃ and 25/20℃ day/night temperature. The results showed that the malondialdehyde（MDA） content and superoxide anion（O2^-·） were increased remarkably, while the activities of superoxide dismutase（SOD） and catalase（CAT） were obviously decreased with the duration of low temperature treatment. Moreover, the change enhanced with the increased difference between day and night temperatures. Meanwhile, the index of unsaturated fatty acid （IUFA） of both varieties also increased. As a result, the photosynthetic rate and the chlorophyll content were decreased considerably, while at beginning the carotenoids content increased and then decreased. Of all the parameters investigated, the variation range In Llangyou 122 was less than that in Shanyou 63, but the values of the former were more than the latter, which means that Llangyou 122 may be more resistant to chilling temperature at the milky stage.
文摘有机发光二极管(Organic Light-Emitting Diode,OLED)显示技术通过有机材料的自主发光,展现出广色域、低能耗、柔性化等优点,是最具发展潜力的显示技术之一。目前OLED显示仍存在寿命短、亮度低和可靠性差等问题,这些问题最终导致残像现象的发生,本文旨在分析和总结OLED显示残像问题的研究进展和相关解决方案。首先,阐释了OLED显示残像问题与OLED材料寿命和薄膜晶体管(Thin Film Transistor,TFT)稳定性的关联,关注柔性与刚性OLED器件的结构差异,进一步总结、归纳了OLED残像的产生机制。其次,针对不同的残像诱发原因,讨论了缓解和补偿OLED显示残像的方法,包括提升OLED有机材料寿命和TFT阈值电压稳定性、外部补偿电路等方案。最后,对OLED显示残像问题的进一步解决办法进行了展望。
