Qiuliang Wang

Learn More
This work aims to compute sensitivity derivatives of statistical quantities in turbulent flows to perturbations in the flow. Computing these sensitivities can enable efficient error estimation and uncertainty quantification of these statistical quantities of interest. However, conventional adjoint based methods often diverge in turbulent flow simulations(More)
The uniformity of the static magnetic field B0 is of prime importance for an MRI system. The passive shimming technique is usually applied to improve the uniformity of the static field by optimizing the layout of a series of steel shims. The steel pieces are fixed in the drawers in the inner bore of the superconducting magnet, and produce a magnetizing(More)
Based on a method used to calculate the magnetic field in a thin clearance between superconducting blocks, this paper analyzes the force characteristics of the superconducting passive suspension system. Superconducting magnetic suspension system is an essentially self-stabilization system. At the basis of the existing structure, an electrostatic suspension(More)
PURPOSE To improve the performance of non-Cartesian partially parallel imaging (PPI) by exploiting artificial sparsity, the generalized autocalibrating partially parallel acquisitions (GRAPPA) operator for wider band lines (GROWL) is taken as a specific example for explanation. THEORY This work is based on the GRAPPA-like PPI having an improved(More)