The transformer early failure on line supervisory equipment is a key apparatus to realise transformer state maintenance technique,in which,the spectrum analysis method of transformer oil is a mature and effective method to determine transformer failure.

Through the initial failure test,the failure positions and failure causes sort of a type of CNC system are analyzed.

Differential resonator method for early fault visual detection of generator rotor system;

Diagnosis method of aeroengine early fault based on the Dempster-Shafer evidence theory;

Gear tooth crack early fault diagnosis based on the cyclostationary demodulation;

To extract incipient fault feature of mechanical signal, a new method to construct wavelet according to the fault characteristics is presented.

The importance of motor incipient faults detection is made clear in this paper.

Two methods based on phase map and Lyapunov exponents of Duffing oscillator were presented to diagnose the incipient fault of rolling bearing.

Whole cycle symptom abstract and fault diagnosis based on the wavelet packet decomposition;

This article utilized the information-fusion method in neural networks to construct an on-line sensor fault diagnosis model.

Through a special data dealing process, con tents of five characteristic gases obtained by DGA are transformed, and 6 charac teristic components for fault diagnosis are distilled for SVMs.