Pan Jiluan, Professor of Mechanical Engineering, member of the Chinese Academy of Sciences. Born in 1927 in Ruichang, Jiangxi Province. Distinguished welding engineering expert. Graduated from Tsinghua University. Postgraduate degrees from Harbin University of Technology. President of Nanchang University. Participated in the establishment of the first Welding Departments in Chinese universities. Developed heavy section electro-slag welding process and surfacing technology for heavy die forging, which were applied in industries in 1950's. Argon gas shielded arc welding process was developed for nuclear reactors manufactured in early 1960's. This process was used on the first nuclear reactor made in China without foreign assistance. Subsequently designed and developed the first electron beam welding machine in China. Detailed study on the mechanism of hot crack formation during welding was also carried out in the same time. He has studies arc sensors since 1978, and established the first physical mathematical model of the static and dynamic characteristics of arc sensors, and successfully developed a distinctive arc sensor and automatic seam tracking system. In the 1980's he invented QH-ARC the welding arc control method in which the ideas of using the multi-segmental, steep uprising and scanning output characteristics of the power source to control the arc were created. This invention provided a new way for further development of welding arc control and process automation.