某电厂安萨尔多AE94.3A燃气-蒸汽联合循环调峰机组,在投入商业运行初期,运行人员在机组启停过程中有过多次误操作,导致机组跳闸。在原有集散控制系统(DCS)的基础上进行了自动启停(automatic procedure startup and shutdown,APS)技术升...某电厂安萨尔多AE94.3A燃气-蒸汽联合循环调峰机组,在投入商业运行初期,运行人员在机组启停过程中有过多次误操作,导致机组跳闸。在原有集散控制系统(DCS)的基础上进行了自动启停(automatic procedure startup and shutdown,APS)技术升级改造,从而降低了运行人员的工作强度,减少误操作,对机组长期的安全稳定运行有重大意义。本文围绕某电厂安萨尔多AE94.3A联合循环机组自动启停技术项目的实施,介绍了自动启停技术整体设计框架,并对各功能断点进行了分层解析,最终对项目碰到的难点进行分析,提出了解决方案。展开更多
To improve the performance of chaotic secure communication,three simplified chaotic systems with one variable parameter were investigated.Basic properties were analyzed including symmetry,dissipation and topological s...To improve the performance of chaotic secure communication,three simplified chaotic systems with one variable parameter were investigated.Basic properties were analyzed including symmetry,dissipation and topological structure.Complex dynamical behaviors of the systems including chaos and periodic orbits were verified by numerical simulations,Lyapunov exponents and bifurcation diagrams.Interestingly,the three systems were integrated in a common circuit,and their dynamical behaviors were easily observed by adjusting regulable resistors R28,R14 and R17,respectively,and the relations between the variable resistor and the system parameter were deduced.The circuit experiment results agree well with the simulation results.Finally,a secure communication scheme based on chaos shift keying(CSK) was presented,which lays an experiment foundation for chaotic digital secure communication.展开更多
The right to social security is the basic right of citizens of a country. The International Covenant on Economic, Social and Cultural Rights, which came into effect for China on June 27, 2001, stipulates in its Articl...The right to social security is the basic right of citizens of a country. The International Covenant on Economic, Social and Cultural Rights, which came into effect for China on June 27, 2001, stipulates in its Article 9 that "the States Parties to the present Covenant recognize the right of everyone to social security, including social insurance." It also says in its Article 2 (1) that "each State Party to the present Covenant undertakes to take steps, individually and through international assistance and co-operation, especially economic展开更多
文摘某电厂安萨尔多AE94.3A燃气-蒸汽联合循环调峰机组,在投入商业运行初期,运行人员在机组启停过程中有过多次误操作,导致机组跳闸。在原有集散控制系统(DCS)的基础上进行了自动启停(automatic procedure startup and shutdown,APS)技术升级改造,从而降低了运行人员的工作强度,减少误操作,对机组长期的安全稳定运行有重大意义。本文围绕某电厂安萨尔多AE94.3A联合循环机组自动启停技术项目的实施,介绍了自动启停技术整体设计框架,并对各功能断点进行了分层解析,最终对项目碰到的难点进行分析,提出了解决方案。
基金Projects(611061006,61073187) supported by the National Nature Science Foundation of China
文摘To improve the performance of chaotic secure communication,three simplified chaotic systems with one variable parameter were investigated.Basic properties were analyzed including symmetry,dissipation and topological structure.Complex dynamical behaviors of the systems including chaos and periodic orbits were verified by numerical simulations,Lyapunov exponents and bifurcation diagrams.Interestingly,the three systems were integrated in a common circuit,and their dynamical behaviors were easily observed by adjusting regulable resistors R28,R14 and R17,respectively,and the relations between the variable resistor and the system parameter were deduced.The circuit experiment results agree well with the simulation results.Finally,a secure communication scheme based on chaos shift keying(CSK) was presented,which lays an experiment foundation for chaotic digital secure communication.
文摘The right to social security is the basic right of citizens of a country. The International Covenant on Economic, Social and Cultural Rights, which came into effect for China on June 27, 2001, stipulates in its Article 9 that "the States Parties to the present Covenant recognize the right of everyone to social security, including social insurance." It also says in its Article 2 (1) that "each State Party to the present Covenant undertakes to take steps, individually and through international assistance and co-operation, especially economic