[IEEE 2012 8th IEEE International Symposium on Instrumentation and Control Technology (ISICT) - London, United Kingdom (2012.07.11-2012.07.13)] 2012 8th IEEE International Symposium on Instrumentation and Control Technology (ISICT) Proceedings - Simulation on measuring of nonuniform temperature distribution based on line-of-sight TDLAS by using Tikhonov regularization method