An orthogonal wavelet transform fractionally spaced blind equalization algorithm based on the optimization of genetic algorithm(WTFSE-GA) is proposed in viewof the lowconvergence rate,large steady-state mean square er...An orthogonal wavelet transform fractionally spaced blind equalization algorithm based on the optimization of genetic algorithm(WTFSE-GA) is proposed in viewof the lowconvergence rate,large steady-state mean square error and local convergence of traditional constant modulus blind equalization algorithm(CMA).The proposed algorithm can reduce the signal autocorrelation through the orthogonal wavelet transform of input signal of fractionally spaced blind equalizer,and decrease the possibility of CMA local convergence by using the global random search characteristics of genetic algorithm to optimize the equalizer weight vector.The proposed algorithm has the faster convergence rate and smaller mean square error compared with FSE and WT-FSE.The efficiency of the proposed algorithm is proved by computer simulation of underwater acoustic channels.展开更多
采用水热法将石墨烯生长到泡沫镍上,获得泡沫镍@石墨烯水凝胶基底材料(NF@GH),再以十六烷基三甲基溴化铵(CTAB)为导向剂,在120℃下水热反应后得到NF@GH@NiCoLDH。并研究了石墨烯水凝胶对NF@GH@NiCoLDH复合材料电化学性能的影响。1 mA cm...采用水热法将石墨烯生长到泡沫镍上,获得泡沫镍@石墨烯水凝胶基底材料(NF@GH),再以十六烷基三甲基溴化铵(CTAB)为导向剂,在120℃下水热反应后得到NF@GH@NiCoLDH。并研究了石墨烯水凝胶对NF@GH@NiCoLDH复合材料电化学性能的影响。1 mA cm^(-2)电流密度下NF@GH@NiCoLDH的比容量可达3658 mF cm^(-2),15 mA cm^(-2)时的比容量保持率为67.5%,高于NF@NiCoLDH(58%);10000次循环后的容量保持率为62%(15 mA cm^(-2)),具有较好的循环稳定性和倍率性能。以NF@GH@NiCoLDH为正极材料组装的不对称超级电容器比容量为909 mF cm^(-2)(1 mA cm^(-2)),器件的最高能量密度为0.25 mWh cm^(-2)(功率密度为0.7 mW cm^(-2))。展开更多
基金Sponsored by the Nature Science Foundation of Jiangsu(BK2009410)
文摘An orthogonal wavelet transform fractionally spaced blind equalization algorithm based on the optimization of genetic algorithm(WTFSE-GA) is proposed in viewof the lowconvergence rate,large steady-state mean square error and local convergence of traditional constant modulus blind equalization algorithm(CMA).The proposed algorithm can reduce the signal autocorrelation through the orthogonal wavelet transform of input signal of fractionally spaced blind equalizer,and decrease the possibility of CMA local convergence by using the global random search characteristics of genetic algorithm to optimize the equalizer weight vector.The proposed algorithm has the faster convergence rate and smaller mean square error compared with FSE and WT-FSE.The efficiency of the proposed algorithm is proved by computer simulation of underwater acoustic channels.
文摘采用水热法将石墨烯生长到泡沫镍上,获得泡沫镍@石墨烯水凝胶基底材料(NF@GH),再以十六烷基三甲基溴化铵(CTAB)为导向剂,在120℃下水热反应后得到NF@GH@NiCoLDH。并研究了石墨烯水凝胶对NF@GH@NiCoLDH复合材料电化学性能的影响。1 mA cm^(-2)电流密度下NF@GH@NiCoLDH的比容量可达3658 mF cm^(-2),15 mA cm^(-2)时的比容量保持率为67.5%,高于NF@NiCoLDH(58%);10000次循环后的容量保持率为62%(15 mA cm^(-2)),具有较好的循环稳定性和倍率性能。以NF@GH@NiCoLDH为正极材料组装的不对称超级电容器比容量为909 mF cm^(-2)(1 mA cm^(-2)),器件的最高能量密度为0.25 mWh cm^(-2)(功率密度为0.7 mW cm^(-2))。
