improvevt.改善；改进；提高vi.变得更好；改进improved GA改进遗传算法improvemeat改造improve SNR改善信噪比improved USR改进型USRimproved CSA改进克隆选择算法Improved LQR改进LRQ方法improved PSO改进粒子群improved MBR改进式MBRimprove rate提高利率improve land开垦地