In this paper, a logistical regression statistical analysis (LR) is presented for a set of variables used in experimental measurements in reversed field pinch (RFP) machines, commonly known as “slinky mode” (SM), ob...In this paper, a logistical regression statistical analysis (LR) is presented for a set of variables used in experimental measurements in reversed field pinch (RFP) machines, commonly known as “slinky mode” (SM), observed to travel around the torus in Madison Symmetric Torus (MST). The LR analysis is used to utilize the modified Sine-Gordon dynamic equation model to predict with high confidence whether the slinky mode will lock or not lock when compared to the experimentally measured motion of the slinky mode. It is observed that under certain conditions, the slinky mode “locks” at or near the intersection of poloidal and/or toroidal gaps in MST. However, locked mode cease to travel around the torus;while unlocked mode keeps traveling without a change in the energy, making it hard to determine an exact set of conditions to predict locking/unlocking behaviour. The significant key model parameters determined by LR analysis are shown to improve the Sine-Gordon model’s ability to determine the locking/unlocking of magnetohydrodyamic (MHD) modes. The LR analysis of measured variables provides high confidence in anticipating locking versus unlocking of slinky mode proven by relational comparisons between simulations and the experimentally measured motion of the slinky mode in MST.展开更多
HMST-5A/SnCl4 complex catalyst is prepared by using MST-5A and SnCl4 in alcohol solution as a medium,and characterized by DTA,IR and UV-vis spectrum.The preparation method is simple and the catalyst is easily separate...HMST-5A/SnCl4 complex catalyst is prepared by using MST-5A and SnCl4 in alcohol solution as a medium,and characterized by DTA,IR and UV-vis spectrum.The preparation method is simple and the catalyst is easily separated.The experimental results show that the catalyst has high activity on the esterification of n-butyl alcohol and acetic acid and can be used repeatedly.展开更多
大气水平风场是研究大气动力特征、过程以及上下层之间的动力耦合的重要参数。MST(Mesosphere Stratosphere and Troposphere)雷达在大气风场探测中发挥独特的作用,可获取高时空分辨率的大气风场廓线数据。在国家重大科技基础设施项目...大气水平风场是研究大气动力特征、过程以及上下层之间的动力耦合的重要参数。MST(Mesosphere Stratosphere and Troposphere)雷达在大气风场探测中发挥独特的作用,可获取高时空分辨率的大气风场廓线数据。在国家重大科技基础设施项目子午工程支持下由中国科学院大气物理研究所建设的北京MST雷达位于中国科学院大气物理研究所香河大气综合观测试验站(39.75°N,116.96°E)。本数据集包含2012年北京MST雷达探测的3-25 km大气水平风速、水平风向数据。垂直分辨率600米,探测时间间隔为30分钟。去除异常点后的风场廓线与探空数据有很好的一致性。本数据集可在对流层-下平流层大气风场、波动等大气动力学以及大气过程研究中发挥独特作用。展开更多
文摘In this paper, a logistical regression statistical analysis (LR) is presented for a set of variables used in experimental measurements in reversed field pinch (RFP) machines, commonly known as “slinky mode” (SM), observed to travel around the torus in Madison Symmetric Torus (MST). The LR analysis is used to utilize the modified Sine-Gordon dynamic equation model to predict with high confidence whether the slinky mode will lock or not lock when compared to the experimentally measured motion of the slinky mode. It is observed that under certain conditions, the slinky mode “locks” at or near the intersection of poloidal and/or toroidal gaps in MST. However, locked mode cease to travel around the torus;while unlocked mode keeps traveling without a change in the energy, making it hard to determine an exact set of conditions to predict locking/unlocking behaviour. The significant key model parameters determined by LR analysis are shown to improve the Sine-Gordon model’s ability to determine the locking/unlocking of magnetohydrodyamic (MHD) modes. The LR analysis of measured variables provides high confidence in anticipating locking versus unlocking of slinky mode proven by relational comparisons between simulations and the experimentally measured motion of the slinky mode in MST.
文摘HMST-5A/SnCl4 complex catalyst is prepared by using MST-5A and SnCl4 in alcohol solution as a medium,and characterized by DTA,IR and UV-vis spectrum.The preparation method is simple and the catalyst is easily separated.The experimental results show that the catalyst has high activity on the esterification of n-butyl alcohol and acetic acid and can be used repeatedly.
文摘大气水平风场是研究大气动力特征、过程以及上下层之间的动力耦合的重要参数。MST(Mesosphere Stratosphere and Troposphere)雷达在大气风场探测中发挥独特的作用,可获取高时空分辨率的大气风场廓线数据。在国家重大科技基础设施项目子午工程支持下由中国科学院大气物理研究所建设的北京MST雷达位于中国科学院大气物理研究所香河大气综合观测试验站(39.75°N,116.96°E)。本数据集包含2012年北京MST雷达探测的3-25 km大气水平风速、水平风向数据。垂直分辨率600米,探测时间间隔为30分钟。去除异常点后的风场廓线与探空数据有很好的一致性。本数据集可在对流层-下平流层大气风场、波动等大气动力学以及大气过程研究中发挥独特作用。