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| 1 | +# Recommender System |
| 2 | + |
| 3 | +Recommender systems serve as intelligent agents, offering suggestions |
| 4 | +for items most relevant to a specific user. To do so, they scrutinize |
| 5 | +data items such as user characteristics, item features, and the |
| 6 | +interactions between the two. Over the past few years, powerhouse |
| 7 | +companies like Google, Facebook, and Alibaba have harnessed deep |
| 8 | +learning technologies to enhance the capabilities of recommender models. |
| 9 | +By deploying deep learning methodologies, these systems are endowed with |
| 10 | +the capability to effectively learn from data through gradient-based |
| 11 | +methods. Moreover, these systems are able to exploit large neural |
| 12 | +networks, including transformers and emerging large language models. |
| 13 | +This, in turn, bolsters the system's proficiency in dissecting complex, |
| 14 | +multi-modal data. |
| 15 | + |
| 16 | +In this chapter, we will delve into the foundational elements of deep |
| 17 | +learning recommender systems (DLRSs). We will elucidate key operational |
| 18 | +processes within these systems, primarily focusing on the multi-stage |
| 19 | +generation of recommendations and the updating of model parameters. |
| 20 | +Lastly, we will delve into a real-world recommender system, shedding |
| 21 | +light on strategic approaches used to tackle practical challenges. |
| 22 | + |
| 23 | +This chapter has the following learning objectives: |
| 24 | + |
| 25 | +1. Understand the architecture of a recommender system and its |
| 26 | + essential components. |
| 27 | + |
| 28 | +2. Understand multi-stage recommendation and model update in a |
| 29 | + recommender system. |
| 30 | + |
| 31 | +3. Attain insights into the challenges faced by practical recommender |
| 32 | + systems and discover their corresponding solutions. |
| 33 | + |
| 34 | +```toc |
| 35 | +:maxdepth: 2 |
| 36 | +
|
| 37 | +Overview |
| 38 | +System_Components |
| 39 | +Recommendation_Pipeline |
| 40 | +Model_Update |
| 41 | +Supporting_Real-time_Machine_Learning |
| 42 | +Chapter_Summary |
| 43 | +Further_Reading |
| 44 | +``` |
| 45 | + |
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