In this paper, the Authors present the designing of power system stabilizer (PSS) and static var compensator (SVC) based on chaos, particle swarm optimization (PSO) and shuffled frog leaping (SFL) Algorithms has been ...In this paper, the Authors present the designing of power system stabilizer (PSS) and static var compensator (SVC) based on chaos, particle swarm optimization (PSO) and shuffled frog leaping (SFL) Algorithms has been presented to improve the power system stability. Single machine infinite bus (SMIB) system with SVC located at the terminal of generator has been considered to evaluate the proposed SVC and PSS controllers. The coefficients of PSS and SVC controller have been optimized by Chaos, PSO and SFL algorithms. Fi-nally the system with proposed controllers is simulated for the special disturbance in input power of genera-tor, and then the dynamic responses of generator have been presented. The simulation results show that the system composed with recommended controller has outstanding operation in fast damping of oscillations of power system and describes an application of Chaos, PSO and SFL algorithms to the problem of designing a Lead-Lag controller used in PSS and SVC in power system.展开更多
There are quite a few students in China are incompetent to organize text in a cohesive and coherent way in English writ-ing. This essay gives a general introduction of systemic functional linguistics theory, aiming at...There are quite a few students in China are incompetent to organize text in a cohesive and coherent way in English writ-ing. This essay gives a general introduction of systemic functional linguistics theory, aiming at emphasizing the feasibility of apply-ing SFL as a tool to improve the English writing proficiency of students in China.展开更多
使用Himawari-8静止卫星数据,基于CALIPSO卫星云底高度结合云雾水平均匀性特征提取海雾/低云标签,并使用全卷积神经网络与全连接条件随机场相结合的模型(Fully Convolutional Network and Conditional Random Field,FCN-CRF),提出一种...使用Himawari-8静止卫星数据,基于CALIPSO卫星云底高度结合云雾水平均匀性特征提取海雾/低云标签,并使用全卷积神经网络与全连接条件随机场相结合的模型(Fully Convolutional Network and Conditional Random Field,FCN-CRF),提出一种夜间海雾/低云卫星检测方法。经过建立与训练模型,使用CALIPSO卫星的海雾/低云观测检验FCN-CRF模型和双通道差值法的结果。FCN-CRF模型表现良好,其检出率(probability of detection,POD)为0.611,虚警率(false alarm ratio,FAR)为0.174,临界成功指数(critical success index,CSI)为0.541,Hanssen-Kuiper技能分数(Hanssen-Kuiper Skill Score,KSS)为0.436,Heidke技能分数(Heidke Skill Score,HSS)为0.577,整体优于双通道差值法。展开更多
文摘In this paper, the Authors present the designing of power system stabilizer (PSS) and static var compensator (SVC) based on chaos, particle swarm optimization (PSO) and shuffled frog leaping (SFL) Algorithms has been presented to improve the power system stability. Single machine infinite bus (SMIB) system with SVC located at the terminal of generator has been considered to evaluate the proposed SVC and PSS controllers. The coefficients of PSS and SVC controller have been optimized by Chaos, PSO and SFL algorithms. Fi-nally the system with proposed controllers is simulated for the special disturbance in input power of genera-tor, and then the dynamic responses of generator have been presented. The simulation results show that the system composed with recommended controller has outstanding operation in fast damping of oscillations of power system and describes an application of Chaos, PSO and SFL algorithms to the problem of designing a Lead-Lag controller used in PSS and SVC in power system.
文摘There are quite a few students in China are incompetent to organize text in a cohesive and coherent way in English writ-ing. This essay gives a general introduction of systemic functional linguistics theory, aiming at emphasizing the feasibility of apply-ing SFL as a tool to improve the English writing proficiency of students in China.
