Topology optimization of structures using meshless density variable approximants

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Integrated topology optimization with embedded movable holes based on combined description by material density and level sets (2013, methodology): “[30] proposed a new topology optimization method by using the dual-level point density approximant and the meshless Galerkin method.”
A multi-material level set-based topology and shape optimization method (2015, background): “Different topology optimization approaches have been proposed over the past two decades [3–11], and recent development of topology optimization can be found in review papers [12–14].”
Adaptive topology optimization with independent error control for separated displacement and density fields (2014, background): “Since the work of [26], nodal design variable-based methods have attracted much attention [27–30].”