We applied theory of probability to physical property parameter statistics and proposed a concept of parameter scope characteristics, meanwhile, discussed a composite analysis method of multiple physical property parameters.

According to the attenuation theory of elastic wave, a relationship of signal amplitude of reverse source by means of the signal amplitude being detected is established, and the intensity of source is approximately reversed with numerical calculation by computer.

Application of wavelet package transformation for power load feature signal extraction;

For solving the difficulty of feature signal extraction with strong noise, a new method which is based on Independent Com- ponent Analysis (ICA) is proposed.

It reveals that the optical leverage relationship and the variance of signal characteristics serve as two main factors affecting the average FWHM of the measured signal pulses.

Based on truing model of saucer diamond-grinding wheel with cup wheel, the influence of contact stiffness between saucer wheel and cup wheel on the stability of the grinding system and grinding force was discussed, as well as verifying of the signal characteristic and changing rule of grinding force.

Based on the classification of signal characteristic,a model of quantitative recogni.

Energy properties and characteristic signal of fuel-rich propellants containing 3,4-diamino-furazan;

By virtue of the analytical principle of smallwave and the fault signals decomposed from smallwavepacket,some frequency channels relative to the faults are extracted and restructured,the component of main vibration and the interfering terms are rejected, so that the characteristic signals of the fault are separated from complex vibration signals.

It is widely used in the fields of engineering and technology for the sine signal which is a characteristic signal.