Wang Qunjing

Application of Region Selective Embedded Zerotree Wavelet Coder in CT Image Compression

Compression is necessary in medical image preservation because of the huge data quantity. Medical images are different from the common images because of their own characteristics, for example, part of information in CT image is useless, and its a kind of resource waste to save this part information. The region selective EZW coder was proposed with which only useful part of image was selected and compressed, and the test image provides good result

A multi-objective hybrid genetic based optimization for external beam radiation

A multi-objective hybrid genetic based optimization algorithm is proposed according to the multi-objective character of inverse planning. It is based on hybrid adaptive genetic algorithm, which combines the simulated annealing, uses adaptive crossover and mutation, and adopts niched tournament selection. The result of the test calculation demonstrates that excellent converge speed can be achieved using this approach

An investigation on brushless DC motor CAD

BLDC motors are widely used in industrial applications in the world, the design of the motor and its control circuits are related to each other, and it implies the complexity of BLDCM. A BLDC motor is a permanent magnet motor, the design methods are much different from that of traditional motors. The paper describes an investigation on design and analysis of BLDCM by use of a finite element method combined with a magnetic-equivalent-circuit method, it shows that the results are correct.

Simulation and Analysis of 2D Magnetic Field of Capsule Endoscope

2D magnetic field of a device used in the micropump of capsule endoscope is analyzed and calculated. Magnetic torque is simulated when the coils and permanent magnet are in different relative positions. The torque is calculated too when strength of external rotational magnetic field is changed. Corresponding results provide theoretical guide to the design and development of device