完整性操作窗口(Integrity Operating Window, IOW)是油气田和炼化企业设备设施完整性管理在工艺操作层面的重要组成部分。随着危害和可操作性(Hazard and Operability, HAZOP)以及基于风险的检验(Risk Based Inspection, RBI)等工艺安...完整性操作窗口(Integrity Operating Window, IOW)是油气田和炼化企业设备设施完整性管理在工艺操作层面的重要组成部分。随着危害和可操作性(Hazard and Operability, HAZOP)以及基于风险的检验(Risk Based Inspection, RBI)等工艺安全技术的推广,IOW可与离散控制系统(Distributed Control System, DCS)建立操作互动、与RBI建立深度融合、为HAZOP提供风险评估依据等,在提升工艺安全管理方面越来越受到重视。通过对IOW标准的简介,着重阐述了IOW首次在南海某深水气田的建立方法、过程、结果和实际应用的意义,表明IOW不仅可以有效提升设备设施完整性管理水平和工艺安全管理水平,还可以深度融入到数字化、智能化油气田的建设中,建议在海上油气田全面推广IOW。展开更多
A non-Noether conserved quantity, i.e., Hojman conserved quantity, constructed by using Mei symmetry for the nonholonomic controllable mechanical system, is presented. Under general infinitesimal transformations, the ...A non-Noether conserved quantity, i.e., Hojman conserved quantity, constructed by using Mei symmetry for the nonholonomic controllable mechanical system, is presented. Under general infinitesimal transformations, the determining equations of the special Mei symmetry, the constrained restriction equations, the additional restriction equations, and the definitions of the weak Mei symmetry and the strong Mei symmetry of the nonholonomic controllable mechanical system are given. The condition under which Mei symmetry is a Lie symmetry is obtained. The form of the Hojman conserved quantity of the corresponding holonomic mechanical system, the weak Hojman conserved quantity and the strong Hojman conserved quantity of the nonholonomie controllable mechanical system are obtained. An example is given to illustrate the application of the results.展开更多
文摘完整性操作窗口(Integrity Operating Window, IOW)是油气田和炼化企业设备设施完整性管理在工艺操作层面的重要组成部分。随着危害和可操作性(Hazard and Operability, HAZOP)以及基于风险的检验(Risk Based Inspection, RBI)等工艺安全技术的推广,IOW可与离散控制系统(Distributed Control System, DCS)建立操作互动、与RBI建立深度融合、为HAZOP提供风险评估依据等,在提升工艺安全管理方面越来越受到重视。通过对IOW标准的简介,着重阐述了IOW首次在南海某深水气田的建立方法、过程、结果和实际应用的意义,表明IOW不仅可以有效提升设备设施完整性管理水平和工艺安全管理水平,还可以深度融入到数字化、智能化油气田的建设中,建议在海上油气田全面推广IOW。
基金supported by the Key Disciplines Building Foundation of Henan Institute of Education
文摘A non-Noether conserved quantity, i.e., Hojman conserved quantity, constructed by using Mei symmetry for the nonholonomic controllable mechanical system, is presented. Under general infinitesimal transformations, the determining equations of the special Mei symmetry, the constrained restriction equations, the additional restriction equations, and the definitions of the weak Mei symmetry and the strong Mei symmetry of the nonholonomic controllable mechanical system are given. The condition under which Mei symmetry is a Lie symmetry is obtained. The form of the Hojman conserved quantity of the corresponding holonomic mechanical system, the weak Hojman conserved quantity and the strong Hojman conserved quantity of the nonholonomie controllable mechanical system are obtained. An example is given to illustrate the application of the results.
