Reproduce “Controllable and Diverse Text Generation in E-commerce” on OpenResearch

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About this paper

Huajie Shao, Jun Wang, Haohong Lin, Xuezhou Zhang, Aston Zhang, Heng Ji, Tarek Abdelzaher

Researchers from the University of Illinois at Urbana-Champaign and Alibaba Group developed Apex, a framework integrating Conditional Variational Autoencoders, a Proportional-Integral (PI) controller, and Transformer architecture for controllable and diverse text generation. This approach precisely manages the diversity-accuracy trade-off and keyword ordering, resulting in a 13.17% improvement in Click-Through Rate for product descriptions on Taobao.

Key insights

  • Closed-loop feedback control, specifically a PI controller, can robustly solve the KL-vanishing problem in CVAEs and dynamically tune the diversity-accuracy trade-off, moving beyond heuristic annealing schedules.
  • Integrating explicit keyword and keyword order embeddings into a Transformer-based CVAE allows for highly accurate control over the sequential presentation of information in generated text.
  • A well-tuned KL-divergence, rather than simply maximizing it, is crucial for achieving an optimal balance between perceived fluency/relevance and the desired level of text diversity.

Summary by alphaXiv.

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