Timestep-Parallel 4D Neuromorphic Computing Array Enabling High Computing Power Density and High Energy Efficiency. - Pujun Zhou; Changhui Xiao; Liwei Meng; Qi Yu 002; Ning Ning 002; Yang Liu 062; Shaogang Hu; Guanchao Qiao (IEEE Trans. Circuits Syst. II Express Briefs, 2025)