This study was conducted to analyze the regulation mechanisms of TAC1,TACR1,TACR2 and TACR3 genes on reproduction of goat under different photoperiods. The expression conditions of TAC1,TACR1,TACR2 and TACR3 genes in ...This study was conducted to analyze the regulation mechanisms of TAC1,TACR1,TACR2 and TACR3 genes on reproduction of goat under different photoperiods. The expression conditions of TAC1,TACR1,TACR2 and TACR3 genes in 12 tissues( oviduct,ovary,uterus,gluteus,mesenteric fat,brain,cerebellum,medulla oblongata,hart,lung,liver,kidney) of adult Henan Huai goat under different photoperiods( short day light,Light 8 h∶ dark 16 h,and long day light,light 16 h∶ dark 8 h) were analyzed by q-PCR method. TAC1,TACR1,TACR2 and TACR3 genes were expressed in all the 12 tissues of goats,with different expression characteristics; and the expression levels of all the genes were affected by photoperiod and changing of light signal between light and dark under short photoperiod. Shifting of light signal from dark to light was more conductive to the expression of these genes in all tissues than that of light signal from light to dark.There were significant differences in the expression levels of genes between light shifting from light to dark and from dark to light when the genes were expressed at a higher level in some tissues. TAC1 and TACR2 genes were expressed at a higher level than TACR1 and TACR3 genes in the various tissues,which implied that TACR2 is a receptor given priority to combine with TAC1 when TAC1 is functional.展开更多
列车自主运行系统(Train Autonomous Control System,简称TACS)作为一种基于无人驾驶的列车运行系统,其与传统的轨道交通信号系统的深度融合及优化策略研究,是智能轨道交通系统发展过程中的重要环节。本论文通过分析TACS与轨道交通信号...列车自主运行系统(Train Autonomous Control System,简称TACS)作为一种基于无人驾驶的列车运行系统,其与传统的轨道交通信号系统的深度融合及优化策略研究,是智能轨道交通系统发展过程中的重要环节。本论文通过分析TACS与轨道交通信号系统的相互关系和相互影响,提出了一套针对各种设备和模型的系统化优化方法,应用面向对象的方法和技术,借鉴流程控制理论与技术,主要针对列车运行控制、列车运行组织优化、信号设备状态监控与预警,停车定位与限速,通讯与信息处理,以及列车运行调度等六大模块进行了深度融合与优化策略研究。研究表明,所提出的融合与优化策略显著提升了系统的运行性能和可靠性,同时,该研究成果对于推动列车自主运行系统与轨道交通信号系统的互补融合,实现智能轨道交通系统的目标具有重大意义。展开更多
利用TaCl5-Ar-C3H6体系，采用X射线衍射技术和扫描电镜研究不同温度下化学气相沉积Tac涂层微观形貌及晶粒择优生长。结果表明：在800～1200℃时，随沉积温度升高，TaC颗粒从网球形逐渐转变为多角形以及金字塔形多面体，而其晶体择优取...利用TaCl5-Ar-C3H6体系，采用X射线衍射技术和扫描电镜研究不同温度下化学气相沉积Tac涂层微观形貌及晶粒择优生长。结果表明：在800～1200℃时，随沉积温度升高，TaC颗粒从网球形逐渐转变为多角形以及金字塔形多面体，而其晶体择优取向依次从无明显择优取向向〈220〉和H〈200〉转变；利用牛长参数α和VAN DER DRIFT,MEAKIN的纳米级晶粒选择生长模型可较好地解释不同形貌的生长机制。当a=3时，薄膜会优先生长成〈200〉择优取向的金字塔品粒；当a=1．5时，则容易生长成〈220〉取向的多角形品粒。展开更多
基金Supported by National Natural Science Foundation of China(31472095)Earmarked Fund for China Agriculture Research System(CARS-38)
文摘This study was conducted to analyze the regulation mechanisms of TAC1,TACR1,TACR2 and TACR3 genes on reproduction of goat under different photoperiods. The expression conditions of TAC1,TACR1,TACR2 and TACR3 genes in 12 tissues( oviduct,ovary,uterus,gluteus,mesenteric fat,brain,cerebellum,medulla oblongata,hart,lung,liver,kidney) of adult Henan Huai goat under different photoperiods( short day light,Light 8 h∶ dark 16 h,and long day light,light 16 h∶ dark 8 h) were analyzed by q-PCR method. TAC1,TACR1,TACR2 and TACR3 genes were expressed in all the 12 tissues of goats,with different expression characteristics; and the expression levels of all the genes were affected by photoperiod and changing of light signal between light and dark under short photoperiod. Shifting of light signal from dark to light was more conductive to the expression of these genes in all tissues than that of light signal from light to dark.There were significant differences in the expression levels of genes between light shifting from light to dark and from dark to light when the genes were expressed at a higher level in some tissues. TAC1 and TACR2 genes were expressed at a higher level than TACR1 and TACR3 genes in the various tissues,which implied that TACR2 is a receptor given priority to combine with TAC1 when TAC1 is functional.
文摘列车自主运行系统(Train Autonomous Control System,简称TACS)作为一种基于无人驾驶的列车运行系统,其与传统的轨道交通信号系统的深度融合及优化策略研究,是智能轨道交通系统发展过程中的重要环节。本论文通过分析TACS与轨道交通信号系统的相互关系和相互影响,提出了一套针对各种设备和模型的系统化优化方法,应用面向对象的方法和技术,借鉴流程控制理论与技术,主要针对列车运行控制、列车运行组织优化、信号设备状态监控与预警,停车定位与限速,通讯与信息处理,以及列车运行调度等六大模块进行了深度融合与优化策略研究。研究表明,所提出的融合与优化策略显著提升了系统的运行性能和可靠性,同时,该研究成果对于推动列车自主运行系统与轨道交通信号系统的互补融合,实现智能轨道交通系统的目标具有重大意义。
文摘利用TaCl5-Ar-C3H6体系，采用X射线衍射技术和扫描电镜研究不同温度下化学气相沉积Tac涂层微观形貌及晶粒择优生长。结果表明：在800～1200℃时，随沉积温度升高，TaC颗粒从网球形逐渐转变为多角形以及金字塔形多面体，而其晶体择优取向依次从无明显择优取向向〈220〉和H〈200〉转变；利用牛长参数α和VAN DER DRIFT,MEAKIN的纳米级晶粒选择生长模型可较好地解释不同形貌的生长机制。当a=3时，薄膜会优先生长成〈200〉择优取向的金字塔品粒；当a=1．5时，则容易生长成〈220〉取向的多角形品粒。
