煤矿坑道钻机自动化和智能化程度的提高、作业范围和应用场景的扩展,使其系统复杂性和工作环境恶劣程度随之增加,对煤矿坑道钻机可靠性提出新的挑战。为有效降低因钻机故障带来的安全风险,提升钻机全寿命周期的任务品质,煤矿坑道钻机状...煤矿坑道钻机自动化和智能化程度的提高、作业范围和应用场景的扩展,使其系统复杂性和工作环境恶劣程度随之增加,对煤矿坑道钻机可靠性提出新的挑战。为有效降低因钻机故障带来的安全风险,提升钻机全寿命周期的任务品质,煤矿坑道钻机状态监测与故障诊断技术应运而生。首先从钻机状态参数采集、数据处理、诊断方法、系统应用等四个方面对煤矿坑道钻机关键系统状态监测和故障诊断技术研究现状进行总结分析,然后在故障预测与健康管理(prognostics and health management, PHM)技术基本概念的基础上根据集中式与分布式结合的方式提出了坑道钻机PHM技术框架,最后对煤矿坑道钻机PHM技术发展趋势进行展望,旨在为新一代煤矿坑道钻机及相关煤矿机械装备PHM技术的研究开展提供参考和借鉴。展开更多
Electron-ion recombination of Be-like ^(40)Ar^(14)+has been measured by employing the electron-ion merged-beams method at the cooler storage ring CSRm.The measured absolute recombination rate coefficients for collisio...Electron-ion recombination of Be-like ^(40)Ar^(14)+has been measured by employing the electron-ion merged-beams method at the cooler storage ring CSRm.The measured absolute recombination rate coefficients for collision energies from 0 to 60 eV are presented in Fig.1,covering all dielectronic recombination(DR)resonances associated with 2s^(2)→2s2p core transitions.In addition,strong trielectronic recombination(TR)resonances associated with 2s^(2)→2p^(2) core transitions were observed.Both DR and TR processes lead to series of peaks in the measured recombination spectrum,which have been identified by the Rydberg formula.Theoretical calculations of recombination rate coefficients were performed using the state-of-the-art multi-configuration Breit-Pauli(MCBP)atomic structure code AUTOSTRUCTURE to compare with the experimental results.The plasma rate coefficients for DR+TR of Ar14+were deduced from the measured electron-ion recombination rate coefficients in the temperature range from 10^(3) to 10^(7) K,and compared with calculated data from the literature.展开更多
The total recombination rate coefficients of Be-like 40Ar14+ions have been measured by employing the electron-ion merged-beams technique at the heavy ion storage ring CSRm at IMP.Fig.1 shows the recombination spectrum...The total recombination rate coefficients of Be-like 40Ar14+ions have been measured by employing the electron-ion merged-beams technique at the heavy ion storage ring CSRm at IMP.Fig.1 shows the recombination spectrum for electron energy from 0 to 58 eV in the center-of-mass frame.The resonant capture,involving the core excitation of an electron and two electrons,which is termed dielectronic recombination(DR)and trielectronic recombination(TR)individually and leads to series of peaks,have been preliminarily identified by extending downward in energy from their series limits with the Rydberg formula[1].展开更多
文摘煤矿坑道钻机自动化和智能化程度的提高、作业范围和应用场景的扩展,使其系统复杂性和工作环境恶劣程度随之增加,对煤矿坑道钻机可靠性提出新的挑战。为有效降低因钻机故障带来的安全风险,提升钻机全寿命周期的任务品质,煤矿坑道钻机状态监测与故障诊断技术应运而生。首先从钻机状态参数采集、数据处理、诊断方法、系统应用等四个方面对煤矿坑道钻机关键系统状态监测和故障诊断技术研究现状进行总结分析,然后在故障预测与健康管理(prognostics and health management, PHM)技术基本概念的基础上根据集中式与分布式结合的方式提出了坑道钻机PHM技术框架,最后对煤矿坑道钻机PHM技术发展趋势进行展望,旨在为新一代煤矿坑道钻机及相关煤矿机械装备PHM技术的研究开展提供参考和借鉴。
基金National Natural Science Foundation of China(11320101003,91336102)。
文摘Electron-ion recombination of Be-like ^(40)Ar^(14)+has been measured by employing the electron-ion merged-beams method at the cooler storage ring CSRm.The measured absolute recombination rate coefficients for collision energies from 0 to 60 eV are presented in Fig.1,covering all dielectronic recombination(DR)resonances associated with 2s^(2)→2s2p core transitions.In addition,strong trielectronic recombination(TR)resonances associated with 2s^(2)→2p^(2) core transitions were observed.Both DR and TR processes lead to series of peaks in the measured recombination spectrum,which have been identified by the Rydberg formula.Theoretical calculations of recombination rate coefficients were performed using the state-of-the-art multi-configuration Breit-Pauli(MCBP)atomic structure code AUTOSTRUCTURE to compare with the experimental results.The plasma rate coefficients for DR+TR of Ar14+were deduced from the measured electron-ion recombination rate coefficients in the temperature range from 10^(3) to 10^(7) K,and compared with calculated data from the literature.
基金National Natural Science Foundation of China(11320101003,91336102)。
文摘The total recombination rate coefficients of Be-like 40Ar14+ions have been measured by employing the electron-ion merged-beams technique at the heavy ion storage ring CSRm at IMP.Fig.1 shows the recombination spectrum for electron energy from 0 to 58 eV in the center-of-mass frame.The resonant capture,involving the core excitation of an electron and two electrons,which is termed dielectronic recombination(DR)and trielectronic recombination(TR)individually and leads to series of peaks,have been preliminarily identified by extending downward in energy from their series limits with the Rydberg formula[1].
