刘欢

Liu Huan: publicly available information is limited, and his nationality, dates of birth and death, and educational background cannot currently be confirmed. Judging from the five works held in the collection, his writing interests span artificial intelligence, general computing, applied psychology, and biography. In the technical field, he explains causal inference and machine learning, a cutting-edge direction, for readers who wish to understand how causality enters machine learning models. In the field of psychology and health, he took part in bringing out the Harvard Medical School sleep guide Turn Off the Light and Sleep, which introduces treatments for insomnia in an accessible way. He is also the author of a biography of Zhen Yongsu, recounting the subject's path of study and scientific research. His works emphasize the popularization of knowledge and the transmission of methods, balancing technical expertise with everyday application, and are suitable for introductory readers in the relevant fields.