Lei Wang Zhiyao Huang Baoliang Wang Haifeng Ji Haiqing Li Flow Pattern Identification of Gas-Liquid Two-Phase Flow Based on Capacitively Coupled Contactless Conductivity Detection. 1466-1475 2012 61 IEEE Trans. Instrum. Meas. 5 https://doi.org/10.1109/TIM.2012.2183433 db/journals/tim/tim61.html#WangHWJL12