在网上找了找关于Beam search decoding的文章,发现没有人讲清楚对于文本生成中absorbing state的处理。(如这篇Huggingface的官方教程,以及这篇,算是讲的比较详细的)。所以我去翻了一下transformers库的代码,大概理解了一下absorbing state在实现中是如何处理的。以下代码取自transformers==4.18.0。 Beam search会维护...
服 务 ： 因 为 我 和 的 朋 友 预 定 的 是 山'}] """10 Beam-search decoding与贪婪搜索...
论文阅读:Diverse Beam Search--Decoding Diverse Solutions from Neural Sequence Models,程序员大本营,技术文章内容聚合第一站。
DecodingNeural machine translationStatistical machine translation2021Decoding is an important part of machine translation systems, and the most popular inference algorithm used here is beam search. Beam search algorithm improves translation by allowing a larger search space to be traversed than greedy ...
Normalization:针对Beam Search得分函数的改进。 Decoding with auxiliary language model:利用辅助语言模型改进decoder。 Decoding with lexical constraints:添加对单词或短语的限制,decoder生成时需要参照限制词表。 Search algorithms:优化搜索策略,寻找更高效的算法。2...
论文阅读 Lexically Constrained Decoding for Sequence Generation Using Grid Beam Search 一. 1.beamsearch每个方框代表一个beam,每个beam内包含beam_size个hypothesis。 2. gridbeamsearchbeam的传播空间变成二维:横向...概率会减小,如果一起比较,有约束的beam里的候选的概率一般较小,一起比较会被没有约束的beam的...
In beam search decoding, different hypotheses may producetokens on different timesteps When a hypothesis produces, that hypothesis is complete. Place it aside and continue exploring other hypotheses via beam search. Usually we continue beam search until: ...
源码: https://github.com/rycolab/uid-decoding 「Key insight:」 在序列生成模型中,增大beam search的搜索宽度反而会导致生成文本质量的下降,为了研究beam search隐含的归纳偏差,作者通过探索解码目标MAP的正则项,将beam search隐含的归纳偏差与认知科学中的均匀信息密度(UID)假说联系起来,通过实验证明了UID假说与文本...
首先,将copy后的predict输入到模型中,step为通过NEZHA得到了预测出的输出logits, 保存中间结果(transformer的k,v等值,用于加速decoding的速度)的past,以及当前处于生成的第几步predict_token_idx(初始值为0,每运行一次加一) predict_logits, past, predict_token_idx = step(predict, past=past, predict_token_idx...
Improved systems, methods and apparatuses are provided for fast beam-search decoding for phrasal statistical machine translation. The provided techniques incorporate a front-loaded distortion penalty estimate for future estimated distortion penalty and/or early pruning to reduce the search space. The improv...