# 交友軟體的推薦系統
###### tags: `MLG`
簡報網址：hackmd.io/@kuouu/MLG_final_proposal
---
## Motivation
----
### AInimal 人工智慧社群養成
----
### 相關連結
- [網頁版](https://ainimal.io)（需調整瀏覽器尺寸至手機比例
- [下載連結](http://onelink.to/kfp7jm)
- [FB 粉專](https://www.facebook.com/AInimal)
- [IG 主頁](https://www.instagram.com/ainimal_official/)
- [其他連結](https://joy.link/ainimal)
----
### 現況
----
#### 目前配對機制
隨機選擇一位"符合篩選條件"和"在當天有上線"的人
----
#### 改良--基於人個特質的聊天活絡程度預測
[Google Colab](https://colab.research.google.com/drive/1V33OHXKVuFGInMpeTwKCzmjxGJMZwjyt?usp=sharing)
----
### 正確率
```
train accuracy: 0.78
test accuracy: 0.62
```
可能原因：
- 模型太過簡單
- 人格特質不適合作為聊天活絡程度的評斷標準
---
## Problem Statement
----
希望軟體內能有個推薦系統讓配對達到以下要求：
1. 會回訊息
2. 聊天熱絡
3. 交換其他通訊軟體
----
其他期望：
- 讓沒有在用的人回來使用軟體
- 在使用者數量增加之後依然適用
----
### Input/Output
Input: `user`, `chat`, `friend`
Output: list of recommended users with ranking
---
## Technical Challenges
----
1. 分析哪些屬性值得使用
2. 配對成功的評斷標準
3. 資料篩選
---
## Related Work
----
- [Recommender System for Online Dating Service](https://arxiv.org/pdf/cs/0703042.pdf) 2007 / 162 cites
- [RECON: A reciprocal recommender for online dating](https://www.researchgate.net/publication/221140972_RECON_A_reciprocal_recommender_for_online_dating) 2010 / 184 cites
- [Recommender Systems for Online Dating](https://core.ac.uk/download/pdf/33736431.pdf) 2015 / 6 cites
- [Design of Reciprocal Recommendation Systems for Online
Dating](http://web.cs.ucla.edu/~yzsun/papers/snam2016.pdf) 2016 / 24 cites
- [Shedding More Light on How Instagram Works](https://about.instagram.com/blog/announcements/shedding-more-light-on-how-instagram-works?fbclid=IwAR0L5kk9JEu3dEmz1VqIETTOevSWoc0IcZceaGTS9Vj_m0LccUGuJGsu_T0)
---
## Dataset
----
| 資料名稱 | 數量 |
| -------- | -------- |
| user | 5043 |
| chat | 290559 |
| friend | 22683 |
----
### user
- birth
- gender
- create_at
- ...
可能有些資料必須處理過後取得
----
### chat
- message
- send_from, send_to
- time
- type (文字、貼圖)
----
### friend
- user_1, user_2
- last_message
- created_at
- updated_at
- is_new
- ...
---
## Preliminary Methods
----
1. rule base
2. CF
3. GNN
---
## Evaluation Plans
----
與 HW3 相同
- RMSE
- Recall
- NDCG
---
## Connections to MLG
----
所有的配對 `friend` 可以看成是一個 Graph ，並且 `chat` 能當作是邊上的權重， `user` 則是 node feature
---
## Expected Time Schedule
----
```mermaid
gantt
title Model development
axisFormat %m%d
section development
research: 2021-06-01, 5d
data processing: 4d
programing : 3d
document : 2d
```
----
```mermaid
gantt
title Model development
axisFormat %m%d
section development
research: 2021-06-01, 5d
data processing: 4d
programing : 3d
document : 2d
section deploy
discussion: 2021-07-01, 7d
research: 14d
deploy : 7d
modify : 7d
```
---
## End
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