2025 VOLUME 45 - No. 2CONTENTS:THEORY OF CONTROLBoris S. Mordukhovich. Derivative-free methods in nonconvex optimizationAnatoly Antipin, Elena Khoroshilova. Generalization of the Kalman equation to a linear-quadratic optimal control problemMODELING AND IDENTIFICATIONAsen Asenov, Velizara Pencheva, Emil Yankov. A system for studying the living environment of freshwater living fishMelek Ozsari, Sifa Ozsari, İman Askerzade. Feature selection with genetic algorithm and particle swarm optimization from intrusion detection dataElkhan Sabziev, Adalat Pashayev, Emin Babayev. A function generating pseudorandom numbers with a uniform distribution for creating cryptographic keysArtughrul Gayibov. A unified ranking-based evaluation framework for diverse crop recommendation techniques on the CropIntel DatasetINFORMATION TECHNOLOGY AND SYSTEMSMerve Ozkan. Detection of metal surface defects: improved image processing methods for bullet case mouth surface analysisYaver Aliyev. Development of the FPR-5 intelligent dynamogram chart transmitterTabriz Osmanli. Statistical evaluation of the impact of microlearning and adaptive teaching algorithms on student performanceSayyara Gidayatzada. Environmental safety control in water reservoirs