@Override
  public void beforeStart(UDFParameters parameters, UDTFConfigurations configurations)
      throws Exception {
    configurations.setAccessStrategy(new RowByRowAccessStrategy()).setOutputDataType(Type.DOUBLE);
    list1.clear();
    list2.clear();
    this.result = parameters.getStringOrDefault("result", QUOTINENT_RESULT);
  }
This function calculates deconvolution of two input series.
library-udf/src/main/java/org/apache/iotdb/library/frequency/UDTFDeconv.java