介绍了一种用于丝阵Z箍缩(Z-pinch)内爆实验研究的脉冲放电模块的设计。模块基于直线型变压器驱动器(LTD)技术,包含34个放电支路,通过4个铁基非晶磁芯耦合。每支路由2个40nF电容器和1只4间隙串联气体开关组成,回路电感为220nH。设计了...介绍了一种用于丝阵Z箍缩(Z-pinch)内爆实验研究的脉冲放电模块的设计。模块基于直线型变压器驱动器(LTD)技术,包含34个放电支路,通过4个铁基非晶磁芯耦合。每支路由2个40nF电容器和1只4间隙串联气体开关组成,回路电感为220nH。设计了水电阻负载检验模块输出性能,在匹配状态下,负载上的输出电流峰值916 k A,上升时间99.8 ns。设计了磁绝缘传输线将输出脉冲传输至Z-pinch丝阵负载,并利用"零维模型"对LTD模块和负载的耦合放电进行了模拟计算。结果显示,丝阵负载上的放电电流峰值可达960 k A,上升时间为114 ns。展开更多
This paper introduces a real option approach to valuation of oil companies and uses the real option pricing model to value CNOOC Ltd. at the time of its IPO. The empirical result shows that the option pricing value of...This paper introduces a real option approach to valuation of oil companies and uses the real option pricing model to value CNOOC Ltd. at the time of its IPO. The empirical result shows that the option pricing value of CNOOC Ltd. exceeds its IPO price at about 21%.展开更多
文摘介绍了一种用于丝阵Z箍缩(Z-pinch)内爆实验研究的脉冲放电模块的设计。模块基于直线型变压器驱动器(LTD)技术,包含34个放电支路,通过4个铁基非晶磁芯耦合。每支路由2个40nF电容器和1只4间隙串联气体开关组成,回路电感为220nH。设计了水电阻负载检验模块输出性能,在匹配状态下,负载上的输出电流峰值916 k A,上升时间99.8 ns。设计了磁绝缘传输线将输出脉冲传输至Z-pinch丝阵负载,并利用"零维模型"对LTD模块和负载的耦合放电进行了模拟计算。结果显示,丝阵负载上的放电电流峰值可达960 k A,上升时间为114 ns。
文摘This paper introduces a real option approach to valuation of oil companies and uses the real option pricing model to value CNOOC Ltd. at the time of its IPO. The empirical result shows that the option pricing value of CNOOC Ltd. exceeds its IPO price at about 21%.