超高压水射流在电厂汽轮机叶片清洗中的应用

火力发电机组运行一段时间后,汽轮机叶片、隔板喷嘴都必须进行清洗,以保持机组运行正常和经济性。随着科学技术的发展,目前,电厂越来越多地采用超高压水清洗技术,而逐步淘汰一些老的清洗方法,以保护设备和环境。     

A method for nonlinearity compensation of OFDR based on polynomial regression algorithm

A method based on polynomial regression algorithm(PRA) is proposed in this paper to compensate the nonlinear phase noise in optical frequency domain reflection(OFDR) systems. In this method, the nonlinear phase of OFDR systems is represented by the polynomial phase function, and then the coefficients of the polynomial phase function are estimated by PRA. Finally, the nonlinearity is compensated by match Fourier transform(MFT). Simulation results demonstrate that the proposed algorithm has good performance in compensating both weak and strong nonlinear phase noises of OFDR systems.