A sampling measurement algorithm without frequency tracking based on electronic instrument transformer;

Current feedback frequency tracking control with matching of piezoelectric;

Research on the Frequency Tracking System of HF-Inverter Power Controlled by PI-DPLL;

A new method based on correlation theory and frequency tracing algorithm is presented .

Through DC input voltage regulation and circuit resonant frequency tracing,approximate linear load power regulation can be realized by the power supply.

because of bridge rectifier adopting APFC technology and inverter adopting the frequency tracing technoiogy of no phase difference, which have very important significance on effective running of power network? frequency conversion power supply and loading.

Experimental results show that the energy transmission system is capable of automatic frequency-tracking and transmission power-adjusting and has stable received energy.

In consideration of the process of card wire heating operation,a strategy of frequency-tracking with integral action separation and DPLL(digital phase-locked loop) is employed to work out a high frequency induction heating power with 100 kHz/5 kW for on-line card wire annealing.

The paper studies digital control scheme of resonance inverter frequency-tracking based on all digital phase-locked loop.

We get the basic parameters of recognition through initialization of users, and get the region of gesture of user through video tracking, and then in this region we get characters using moment-describe and multi-scale model.

In this paper,image edge detection in video tracking is put forward based on Beta-spline function.

This paper introduces the design of a video tracking system which is applied to anti-tank guided missile,puts forward the detection method of double moving targets,and solves the calculation problem of the angle between them.