Abstract: The present disclosure provide a method for recognizing a space frequency block code (SFBC), including: obtaining a cross-correlation function of a reception signal, and obtaining a Fourier transformation of the cross-correlation function; obtaining data containing labels by labeling a sample containing a real part and an imaginary part of the Fourier transformation, and inputting the data containing labels into an initial CNN-LSTM network for training until convergence is reached, to obtain a final CNN-LSTM network; and obtaining unlabeled data to be recognized, and inputting the data to be recognized into the final CNN-LSTM network to obtain a SFBC recognition result.

Abstract: An in-situ purification island structure and the construction method thereof, which refers to the field of sewage treatment technology. The in-situ purification island structure comprises the upstream purification island main body and the downstream purification island main body, in which the upstream purification island main body comprises the first base backfill layer, the first lower layer, the first hydrophobic layer, the first water permeable layer and the first upper layer. The first ecological bags are set around the surface of the first base backfill layer. The first lower layer has center formed with a lower layer backfill transitional zone. The first hydrophobic layer has center formed with a hydrophobic layer backfill transitional zone. It has a good natural purifying effect on the sewage, saves the investment and cost, no limitation on the applications, the capacity and efficiency of the purifying is high, and saves the resource.

Abstract: An in-situ purification island structure and the construction method thereof, which refers to the field of sewage treatment technology. The in-situ purification island structure comprises the upstream purification island main body and the downstream purification island main body, in which the upstream purification island main body comprises the first base backfill layer, the first lower layer, the first hydrophobic layer, the first penetrating water layer and the first upper layer. The first ecological bags are set around the surface of the first base backfill layer. The first lower layer has center formed with a lower filling layer. The first hydrophobic layer has center formed with a hydrophobic filling layer. It has a good natural purifying effect on the sewage, saves the investment and cost, no limitation on the applications, the capacity and efficiency of the purifying is high, and saves the resource.