我正在用 tensorflow 构建一个 seq2seq 模型。你能解释一下这两个波束搜索功能的细节吗？谢谢你。
tf.nn.ctc.beam_search_decoder https://www.tensorflow.org/api_docs/python/tf/nn/ctc_beam_search_decoder
tf.contrib.seq2seq.BeamSearchDecoder https://www.tensorflow.org/api_docs/python/tf/contrib/seq2seq/BeamSearchDecoder