11458
Because the number of parameters required by a Volterra series grows rapidly with both the length of its memory and the order of its nonlinearity , methods for identifying these models from measurements of input / output data are limited to low - order systems with relatively short memories .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None