The principle of the method for the BESIII TOF calibration using cosmic ray data without magnetic field are reported in this paper. After applying calibration constants, the single-end readout time resolution could re...The principle of the method for the BESIII TOF calibration using cosmic ray data without magnetic field are reported in this paper. After applying calibration constants, the single-end readout time resolution could reach about 150 ps, and the time resolution for one layer is achieved to be about 110 ps. The paper also described the extraction scheme for the event start time of cosmic events.展开更多
针对国四排放标准实施后市场反馈的误报NO_(x)排放超标问题,为保证选择性催化还原(selective catalytic reduction,SCR)满足车载自动诊断系统的要求,基于模型在环(model in the loop,MIL)离线仿真提出精确计算设定转换效率和转换效率限...针对国四排放标准实施后市场反馈的误报NO_(x)排放超标问题,为保证选择性催化还原(selective catalytic reduction,SCR)满足车载自动诊断系统的要求,基于模型在环(model in the loop,MIL)离线仿真提出精确计算设定转换效率和转换效率限值的新方法。经MIL离线仿真和台架试验验证,新方法可以有效解决SCR效率诊断问题,为解决SCR转换效率误报问题提供了一种新思路。展开更多
基金Supported by National Natural Science Foundation of China (10565001, 10647002, 10875138)
文摘The principle of the method for the BESIII TOF calibration using cosmic ray data without magnetic field are reported in this paper. After applying calibration constants, the single-end readout time resolution could reach about 150 ps, and the time resolution for one layer is achieved to be about 110 ps. The paper also described the extraction scheme for the event start time of cosmic events.
文摘针对国四排放标准实施后市场反馈的误报NO_(x)排放超标问题,为保证选择性催化还原(selective catalytic reduction,SCR)满足车载自动诊断系统的要求,基于模型在环(model in the loop,MIL)离线仿真提出精确计算设定转换效率和转换效率限值的新方法。经MIL离线仿真和台架试验验证,新方法可以有效解决SCR效率诊断问题,为解决SCR转换效率误报问题提供了一种新思路。
