Fig. 1From: Soft - sensing modeling based on ABC - MLSSVM inversion for marine low - temperature alkaline protease MP fermentation processu1~u5 are input parameters, x1~x6 are the six process parameters of fermentation process. The process parameters x4, x5, x6 are directly measurable parameters and x1, x2, x3 are key parameters that are difficult to measure directly on-line (That is, the variable that needs to be predicted)Back to article page