public INDArray biasAdd(INDArray input, INDArray bias, boolean nchw) {
    NDValidation.validateNumerical("biasAdd", "input", input);
    NDValidation.validateNumerical("biasAdd", "bias", bias);
    return Nd4j.exec(new org.nd4j.linalg.api.ops.impl.broadcast.BiasAdd(input, bias, nchw))[0];
  }