[Objective]The paper was to study the physiological mechanism of Oncidium hybridum‘Gower Ramsey’infected by Erwinia carotovora pv.carotovora.[Method]O.hybridum‘Gower Ramsey’was inoculated with E.carotovora by need...[Objective]The paper was to study the physiological mechanism of Oncidium hybridum‘Gower Ramsey’infected by Erwinia carotovora pv.carotovora.[Method]O.hybridum‘Gower Ramsey’was inoculated with E.carotovora by needle-punching method.The leaves inoculated with sterile water were used as control,and samples were collected at 12,24,36 and 48 h post inoculations to determine the physiological indexes,respectively.[Result]The contents of MDA,flavonoid,lignin,soluble protein and the activities of POD,SOD,CAT,PPO and PAL in O.hybridum leaves first increased then decreased.At 12 h post inoculation,the activities of SOD and CAT increased significantly by 40.49%and 37.77%(P<0.01,the same below),respectively;the contents of flavonoid increased significantly by 21.56%(P<0.05,the same below);and the activities of PAL,POD and PPO increased significantly by 42.29%,81.8%and 37.98%,respectively.The contents of MDA and lignin increased significantly by 57.98%and 58.72%at 24 h,respectively;the content of soluble protein increased by 87.71%at 24 h,and 61.28%at 36 h,while the content of Pro increased at 24 h(P>0.05,the same below),and increased significantly by 23.66%at 36 h;the content of soluble sugar content had no significant difference compared with the control.Additionally,the chlorophyll a and carotenoid contents tended to decrease dramatically,while chlorophyll b increased significantly by 95.33%at 24 h,then decreased.The initial fluorescence parameter of Fm/Fv and Y(II)decreased significantly by 47.14%and 54.61%,respectively,while the Y(NO)increased significantly by 33.61%,compared with the control.[Conclusion]The contents of Pro,MDA,lignin,soluble protein and the activities of POD,SOD,CAT,PPO and PAL in O.hybridum leaves are closely related to the infection of E.carotovora,which provide new clues for revealing the infection mechanism of E.carotovora in O.hybridum.展开更多
液体状态机(Liquid State Machine,LSM)具有实时计算和仿生的特点,在处理时间序列数据上具有巨大潜力。为了研究如何提高神经网络模型训练性能,降低计算复杂度,文章首先梳理和回顾了近几年相关研究文献,其次提出硬件实现和软件模型两个...液体状态机(Liquid State Machine,LSM)具有实时计算和仿生的特点,在处理时间序列数据上具有巨大潜力。为了研究如何提高神经网络模型训练性能,降低计算复杂度,文章首先梳理和回顾了近几年相关研究文献,其次提出硬件实现和软件模型两个优化思路,并总结了不同优化方法的优势与不足,硬件和软件上的优化可以提高神经网络模型学习性能和训练速度,但依然存在可控性差、算法最优解未知等问题,最后针对以上问题对未来的研究方向进行了展望,可为时间序列数据处理和模式识别领域提供优化思路。展开更多
基金Young and Middle-aged Teacher Educational Research Project of Fujian Province(KLA19009A)&Major Agricultural Science and Technology Project of Fujian Province(2015NZ0002-1)&Science and Technology Innovation Fund of Fujian Agriculture and Forestry University(KF2015108).
文摘[Objective]The paper was to study the physiological mechanism of Oncidium hybridum‘Gower Ramsey’infected by Erwinia carotovora pv.carotovora.[Method]O.hybridum‘Gower Ramsey’was inoculated with E.carotovora by needle-punching method.The leaves inoculated with sterile water were used as control,and samples were collected at 12,24,36 and 48 h post inoculations to determine the physiological indexes,respectively.[Result]The contents of MDA,flavonoid,lignin,soluble protein and the activities of POD,SOD,CAT,PPO and PAL in O.hybridum leaves first increased then decreased.At 12 h post inoculation,the activities of SOD and CAT increased significantly by 40.49%and 37.77%(P<0.01,the same below),respectively;the contents of flavonoid increased significantly by 21.56%(P<0.05,the same below);and the activities of PAL,POD and PPO increased significantly by 42.29%,81.8%and 37.98%,respectively.The contents of MDA and lignin increased significantly by 57.98%and 58.72%at 24 h,respectively;the content of soluble protein increased by 87.71%at 24 h,and 61.28%at 36 h,while the content of Pro increased at 24 h(P>0.05,the same below),and increased significantly by 23.66%at 36 h;the content of soluble sugar content had no significant difference compared with the control.Additionally,the chlorophyll a and carotenoid contents tended to decrease dramatically,while chlorophyll b increased significantly by 95.33%at 24 h,then decreased.The initial fluorescence parameter of Fm/Fv and Y(II)decreased significantly by 47.14%and 54.61%,respectively,while the Y(NO)increased significantly by 33.61%,compared with the control.[Conclusion]The contents of Pro,MDA,lignin,soluble protein and the activities of POD,SOD,CAT,PPO and PAL in O.hybridum leaves are closely related to the infection of E.carotovora,which provide new clues for revealing the infection mechanism of E.carotovora in O.hybridum.
文摘液体状态机(Liquid State Machine,LSM)具有实时计算和仿生的特点,在处理时间序列数据上具有巨大潜力。为了研究如何提高神经网络模型训练性能,降低计算复杂度,文章首先梳理和回顾了近几年相关研究文献,其次提出硬件实现和软件模型两个优化思路,并总结了不同优化方法的优势与不足,硬件和软件上的优化可以提高神经网络模型学习性能和训练速度,但依然存在可控性差、算法最优解未知等问题,最后针对以上问题对未来的研究方向进行了展望,可为时间序列数据处理和模式识别领域提供优化思路。
