2020 VOLUME 68 ITPRED (ISSN 1053-587X) Articles published in IEEEXplore® from 15 April to 15 May 2020 Quadratic Semidefinite Programming for Waveform-Constrained Joint Filter-Signal Design in STAP 1744-1759 Learning Nonnegative Factors From Tensor Data: Probabilistic Modeling and Inference Algorithm 1792-1806 Quaternion Non-Negative Matrix Factorization: Definition, Uniqueness, and Algorithm 1870-1883 Support Recovery for Sparse Signals With Unknown Non-Stationary Modulation 1884-1896 Two-Dimensional Modular Chaotification System for Improving Chaos Complexity 1937-1949 Fast Adaptive Gradient RBF Networks For Online Learning of Nonstationary Time Series 2015-2030 Sparse Multiresolution Representations With Adaptive Kernels 2031-2044 Invariance Theory for Adaptive Detection in Non-Gaussian Clutter 2045-2060 Distributed Signal Processing and Optimization Based on In-Network Subspace Projections 2061-2076 Fast and Efficient Time-Reversal Imaging Using Space-Frequency Propagator Method 2077-2086 Affine Combination of Diffusion Strategies Over Networks 2087-2104 On Optimality of Weighted Multidimensional Scaling for Range-Based Localization 2105-2113 High-Dimensional Stochastic Gradient Quantization for Communication-Efficient Edge Learning 2128-2142 www.signalprocessingsociety.org [5] JUNE 2020http://www.signalprocessingsociety.org https://dx.doi.org/10.1109/TSP.2020.2977271 https://dx.doi.org/10.1109/TSP.2020.2975353 https://dx.doi.org/10.1109/TSP.2020.2974651 https://dx.doi.org/10.1109/TSP.2020.2975935 https://dx.doi.org/10.1109/TSP.2020.2979596 https://dx.doi.org/10.1109/TSP.2020.2981197 https://dx.doi.org/10.1109/TSP.2020.2976577 https://dx.doi.org/10.1109/TSP.2020.2981213 https://dx.doi.org/10.1109/TSP.2020.2981204 https://dx.doi.org/10.1109/TSP.2020.2981672 https://dx.doi.org/10.1109/TSP.2020.2975346 https://dx.doi.org/10.1109/TSP.2020.2973132 https://dx.doi.org/10.1109/TSP.2020.2983166 http://www.signalprocessingsociety.org