排序方式: 共有70条查询结果,搜索用时 15 毫秒
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曹学香 李卫东 Roy A. Briere 刘春雷 毛泽普 陈申见 邓子艳 何康林 黄性涛 黄彬 黄艳萍 贾卢魁 季晓斌 李秀荣 刘春燕 刘怀民 马秋梅 马想 邱进发 王大勇 伍灵慧 吴智 袁野 张学尧 赵川 张瑶 邹佳恒 《中国物理 C》2010,34(12):1852-1859
The Beijing Spectrometer Ⅲ(BESⅢ)is a general-purpose detector used for the study of τ-charm physics at the Beijing Electron-Positron Collider Ⅱ(BEPC Ⅱ).This paper presents our studies of the dE/dx measurement in the drift chamber of BESⅢ,which is important for the identification of charged particles.Corrections applied to the dE/dx measurement in data reconstruction are discussed.After our current dE/dx calibration,a resolution of about 6% has been obtained for minimum ionization particles,and a 3σ K/πseparation is obtained for momenta up to 760 MeV/c.These results meet the design goals of the BESⅢ drift chamber. 相似文献
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在经典风险模型基础上,研究了保险公司保费收入和索赔均服从复合泊松过程的双复合泊松风险模型,针对最优投资策略和求解破产时刻惩罚金期望折现函数的问题,利用重期望公式和马氏性得到期望折现函数满足的带边界条件的二阶积分微分方程,通过高效的Sinc数值方法求出折现函数的近似数值解,从而由图像分析破产概率变化的趋势. 相似文献
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研制了一种新型的超小型电磁驱动微机械可调光衰减器(VOA).该器件采用电磁驱动器转动硅基微镜改变光路实现可调衰减,在结构上采用了全磁性回复,完全摆脱了通常的弹性回复造成的部件疲劳、零点偏移等器件重复性问题.驱动电压为0~5 V,工作范围0~40 dB,插入损耗小于0.8 dB,回波损耗小于-50 dB.器件重要部件采用微细电火花加工(EDM)技术制作,并应用FEA软件进行了结构优化,对衰减响应进行了详尽的理论分析.该VOA设计体积仅为25×10×7 mm3,可构成阵列应用于波分复用(WDM/DWDM)系统中各信道的动态信号平衡或网络保护. 相似文献
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梁羽铁 冒亚军 尤郑昀 李卫东 边渐鸣 曹国富 曹学香 陈申见 邓子艳 傅成栋 高原宁 韩磊 韩少卿 何康林 何苗 胡继峰 胡小为 黄彬 黄性涛 贾卢魁 季晓斌 李海波 刘北江 刘春秀 刘怀民 刘颖 刘勇 罗涛 吕绮雯 马秋梅 马想 毛泽普 莫晓虎 宁飞鹏 平荣刚 邱进发 宋文博 孙胜森 孙晓东 孙永昭 田浩来 王纪科 王亮亮 文硕频 伍灵慧 吴智 谢宇广 徐敏 言杰 严亮 姚剑 苑长征 袁野 张长春 张建勇 张雷 张学尧 张瑶 郑阳恒 朱永生 邹佳恒 《中国物理 C》2009,(7)
Cosmic-ray data of 90 M events have been collected and used for calibration,alignment as well as detector tuning. A special tracking algorithm for the BESⅢ muon counter is developed and verified with Monte-Carlo simulation and then further confirmed with the cosmic-ray data. The obtained strip resolutions are in good agreement with the design values. A new alignment approach for the BESⅢ muon counter is confirmed with the cosmic-ray data and proposed to be used in future analysis of experimental data. 相似文献
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研究了一类非线性不确定网络系统的指数镇定问题.根据网络诱导时延在不同区间上取值,引入满足Bernoulli分布的随机变量,建立新的非线性网络系统模型.利用Lyapunov稳定性理论,以线性矩阵不等式形式给出系统均方指数镇定条件和模糊控制器设计策略.仿真算例说明了方法的有效性. 相似文献
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Nonlinear response of the driven Duffng oscillator to periodic or quasi-periodic signals has been well studied.In this paper,we investigate the nonlinear response of the driven Duffng oscillator to non-periodic,more specifically,chaotic time series.Through numerical simulations,we find that the driven Duffng oscillator can also show regular nonlinear response to the chaotic time series with different degree of chaos as generated by the same chaotic series generating model,and there exists a relationship between the state of the driven Duffng oscillator and the chaoticity of the input signal of the driven Duffng oscillator.One real-world and two artificial chaotic time series are used to verify the new feature of Duffng oscillator.A potential application of the new feature of Duffng oscillator is also indicated. 相似文献
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