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A brief review of the early work, current research areas, and the further development of computational electromagnetics in China is given in this paper. [ABSTRACT FROM AUTHOR]

This paper describes a design method of a leaf spring using a genetic algorithm. To avoid disconnected shape, a novel genetic representation which contains travel points and their order is proposed. A two-stage search is performed to improve the convergence and compared with the single stage search. To demonstrate the proposed method, it is applied to a leaf spring for an optical disc drive (ODD) actuator. The final result of the genetic algorithm has unnecessary parts, and thus manual mending process is needed. The obtained design of the leaf spring satisfies the required specification. The proposed design method is very simple, and hence it is expected that the proposed design method can be easily applied to other applications. [ABSTRACT FROM AUTHOR]

Processing China Clay to increase its brightness is commercially important for the ceramics and paper industries. Quantum Design, Inc. has developed a high throughput conduction-cooled superconducting magnetic separation system which operates at 6 Tesla with a 10% uniformity over 406 mm. This long uniformity range, along with its 203 mm diameter bore and high magnetic field result in a single system capable of processing 10,000–15,000 tonnes of clay per year. This superconducting magnet is maintained at low temperature using a variable frequency driven Gifford-McMahon refrigerator, which dramatically reduces operating costs compared to a liquid helium cooled magnet ($40 to cool down at $0.10/kWhr). Furthermore, the small footprint of the system combined with the inexpensive operating costs allow for a modular design for systems to be combined specific to the needs of the China Clay mining facility. Testing has been carried out using various types of China Clay, also known as kaolin, from three different mines. Typical results show a reduction in Fe2O3 by over 60%. In particular, before processing, one sample contained 0.85 wt% Fe2O3 and a fired brightness of 88%. After processing in the Quantum Design SHGMS (Superconducting High-Gradient Magnetic Separator), the Fe2O3 content was reduced by 65% to 0.29 wt%, and the fired brightness increased to 92.5%, resulting in a three-fold increase in the value of the clay. [ABSTRACT FROM AUTHOR]

Focuses on the electromagnetic launch (EML) technology research in China. Why EML launchers should be treated as an energy transformer; Background of the theoretical research in China.

The article presents a message from the author on behalf of the Conference on the Computation of Electromagnetic Fields (COMPUMAG) 2005 Organizing Committee. COMPUMAG 2005 was held in China. The author says that the topics included in the conference mostly centered around trends in computational electromagnetics. The papers of this conference have been presented in this issue of the journal "IEEE Transactions on Magnetics." The author also thanked all contributors and participants of the conference. He also thanks his colleagues at the Shenyang University of Technology who worked hard for making this conference successful.

Focuses on a study on the electric launch technology research program in China. Details on rail launchers; Information on launchers using electrothermal-chemical technology; Utilization of a linear magnetic flux compressor for electric guns.