blurred closeness;  pattern recognition;  Resolution;  Troubleshooting

Starting from the definition of Hamming’s closeness, it is analyzed that when there are many fault mode features, the part reflecting the difference in the proximity calculation formula is greatly attenuated, resulting in a decrease in the difference and a decrease in resolution. Furthermore, a new proximity calculation method is proposed and proved, which improves the attenuation of the difference part by properly determining the calculation parameters, effectively improves the resolution in engineering use, and verifies with specific examples.