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本文对ＢＰ算法的突出问题——收敛性问题，进行了深入分析，提出了六条改进措施．在微机上试验表明，用于ＸＯＲ问题，迭代４０次，均方误差Ｅ＝６．１９Ｅ－５，迭代５０次，Ｅ＝１．５５Ｅ－３８；用于故障诊断，收敛效果也极佳
In this paper, the prominent problem of BP algorithm - convergence problem, conducted in-depth analysis, proposed six improvements. Experiments on a microcomputer show that for the XOR problem, the iteration is performed 40 times, the mean square error E = 6.19E-5, the iteration is 50 times and E = 1.55E-38; the convergence effect is also excellent for fault diagnosis