Bioresources and Bioprocessing

Table 1 Statistics of the inputs and output data used

From: Application of gene expression programming, artificial neural network and multilinear regression in predicting hydrochar physicochemical properties

Input variables	Min	Max	Std	Skewness	Kurtosis
VM (%)	34.3	89.74	12.69501	− 1.05705	0.90247
Ash (%)	0.25	49.85	14.04995	1.20789	0.72747
FC (%)	2.66	54	8.38191	2.87274	12.34524
Temperature (°C)	140	300	33.71556	0.08694	− 0.63807
RT (min)	5	480	81.73551	1.62185	3.68928
Output variables
Mass Yield (%)	26.7	99.2	15.89677	0.46028	0.10385
Energy Yield (%)	37.11	112.55	14.4083	0.22913	0.08753
HHV (MJ/kg)	9.8	34.53	5.29801	− 0.24796	− 0.23794

VM Volatile matter, FC fixed carbon, HHV high heating value, RT residence time

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