Aimed at improving knowledge regarding the diurnal cycle of warm-season rainfall in northwestern China,this study investigated the diurnal variations of warm-season precipitation with different durations in Xinjiang,C...Aimed at improving knowledge regarding the diurnal cycle of warm-season rainfall in northwestern China,this study investigated the diurnal variations of warm-season precipitation with different durations in Xinjiang,China,using an hourly gauge–satellite merged precipitation product during 2008 to 2019.Results show noticeable diurnal variations with distinctive regional features.The primary peak is in the early evening.Rainfall events with duration less than 3 h occur more often across the whole of Xinjiang and contribute more than half of the precipitation amount over its northern and southern peripheries,while rainfall events with duration more than 7 h over the Tianshan Mountains are responsible for the primary peak in the diurnal variations of warm-season precipitation.展开更多
SSRF is a third generation,3.5GeV synchrotron light source currently being constructed in Shanghai.The conceptual consideration of its timing system is described in this paper.Different storage ring filling patterns s...SSRF is a third generation,3.5GeV synchrotron light source currently being constructed in Shanghai.The conceptual consideration of its timing system is described in this paper.Different storage ring filling patterns such as single bunch pattern,multi-bunch filling pattern,mixed filling pattern and top-up pattern,demand a highly stable, low jitter timing system with the flexibility to recnfigure on programmable event driven basis.Based on the EPICS control system,the timing system provides digitally programmable sequencing and delay for the electron gun,the linac modulator,the booster and storage ring RF,the pulsed magnets,the instrumentation systems according to different operation pattern requirements.展开更多
基金supported by the National Key Research and Development Project of China[Grant Nos.2018YFC1507104 and 2018YFC1507603]the National Natural Science Foundation of China[Grants Nos.91937301,41875074,and 41675060]the National Key Scientific and Technological Infrastructure Project“Earth Lab”。
文摘Aimed at improving knowledge regarding the diurnal cycle of warm-season rainfall in northwestern China,this study investigated the diurnal variations of warm-season precipitation with different durations in Xinjiang,China,using an hourly gauge–satellite merged precipitation product during 2008 to 2019.Results show noticeable diurnal variations with distinctive regional features.The primary peak is in the early evening.Rainfall events with duration less than 3 h occur more often across the whole of Xinjiang and contribute more than half of the precipitation amount over its northern and southern peripheries,while rainfall events with duration more than 7 h over the Tianshan Mountains are responsible for the primary peak in the diurnal variations of warm-season precipitation.
文摘SSRF is a third generation,3.5GeV synchrotron light source currently being constructed in Shanghai.The conceptual consideration of its timing system is described in this paper.Different storage ring filling patterns such as single bunch pattern,multi-bunch filling pattern,mixed filling pattern and top-up pattern,demand a highly stable, low jitter timing system with the flexibility to recnfigure on programmable event driven basis.Based on the EPICS control system,the timing system provides digitally programmable sequencing and delay for the electron gun,the linac modulator,the booster and storage ring RF,the pulsed magnets,the instrumentation systems according to different operation pattern requirements.
