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An efficient design method of shim coils for an open bipanar superconducting magnetic resonance imaging (MRI) system is proposed, using an inverse boundary element method (IBEM). This design method first discretizes the shim coil space into some small flat triangular elements. By formulating the magnetization distribution by discrete current density, an objective function is constructed to evaluate...
This paper proposes an efficient design method for designing MRI gradient coils on a cylindrical surface geometry, using an inverse boundary element method (IBEM). Based on the approximate current density over the whole coils space, the magnetic field distribution can be obtained in the discrete form. An objective function is found to evaluate the minimum error between actual magnetic field that coils...
The high-field superconducting magnets as a core components of the MRI has been widely used in the fields of medical equipment. The superconducting magnet technology depends on the development of superconducting material properties and cryogenic technology. Compared with conventional imaging equipment, ultra-high-field magnetic resonance imaging technology has unparalleled advantages of the improvement...
Ultra-high magnetic fields help to give us much deeper understanding of the world of matter and have special significance for research into the origins of life and disease prevention. In this paper, the magnet technology, magnetic field applications, and numerical methods for the magnet design are introduced and reviewed.
Development of science and technology requires high magnetic field strength and good field quality. The pursuit of extremely high magnetic fields is an eternal scientific goal for scientists and engineers. It is an exciting cutting-edge technology full of challenges and has been essential for many significant discoveries in science and technology. Combined with power-electronic devices and related...
Momentous project is a strategic project with which a country, in responding to challenges in the development of economy, society or science and technology, pools a large amount of social resources to program and put it into practice. The optimization grouping of experts is one of key problems before making the feasibility study for the momentous project. This paper constructs a mathematic model of...
The location of multi-distribution centers is an NP-hard problem. For some urgent goods, the method of locating the distribution centers in terms of minimizing transportation costs sometimes cannot satisfy the needs of customers. Considering the maximization of service level as the objective to locate the centers, we construct a mathematical model and design a genetic algorithm of optimization to...
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