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Zhihu Tech Column
Zhihu Tech Column
Jun 11, 2025 · Artificial Intelligence

How Minute‑Level Time Decay Boosts User Retention Modeling in Recommendation Systems

This article presents a novel minute‑level future‑reward framework with dual‑delay incentives, activity‑based attribution, multi‑task delayed modeling, and sequential streaming training that dramatically improves user retention prediction accuracy and real‑time performance in large‑scale recommendation platforms.

deep learningmulti‑task modelingreal‑time prediction
0 likes · 17 min read
How Minute‑Level Time Decay Boosts User Retention Modeling in Recommendation Systems
Ctrip Technology
Ctrip Technology
Jun 11, 2018 · Artificial Intelligence

Ctrip Model Engine Platform: An Integrated End‑to‑End Service for Real‑Time AI Model Deployment

The article introduces Ctrip’s Model Engine Platform, a comprehensive system that streamlines feature preparation, engineering, model management, and product orchestration to enable fast, reliable real‑time AI model serving across various business scenarios, while addressing common challenges such as manual data handling, offline‑only prediction, and long development cycles.

AI PlatformCtripfeature management
0 likes · 15 min read
Ctrip Model Engine Platform: An Integrated End‑to‑End Service for Real‑Time AI Model Deployment