In this paper , based on the method of variable replacement , real parameters di > 0 ( i = 1 , 2 , . . . , n ) which can be adjusted , are introduced ingeniously . we establish some new sufficient conditions for the existence , uniqueness and global exponential stability of the equilibrium , periodic solution and almost periodic solution of neural networks with time - varying delays by means of the method of variation of parameters , fixed point theorem and some analysis techniques 本文巧妙地引入可調(diào)實(shí)參數(shù)d _ i 0 ( i = 1 , 2 , … , n ) ,借助常數(shù)變易法、變量替換、不動(dòng)點(diǎn)定理和一些分析技巧,對(duì)具可變時(shí)滯的神經(jīng)網(wǎng)絡(luò)的平衡點(diǎn)、周期解、概周期解的存在性和全局指數(shù)穩(wěn)定性建立了一些新的充分條件。