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在搜索业务下有一个场景叫实时搜索(Instance Search),就是在用户不断输入过程中,实时返回查询结果。 此次赛题来自OPPO手机搜索排序优化的一个子场景,并做了相应的简化,意在解决query-title语义匹配的问题。简化后,本次题目内容主要为一个实时搜索场景下query-title的ctr预估问题。

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tianchi_ogeek's Introduction

tianchi_OGeek

在搜索业务下有一个场景叫实时搜索(Instance Search),就是在用户不断输入过程中,实时返回查询结果。 此次赛题来自OPPO手机搜索排序优化的一个子场景,并做了相应的简化,意在解决query-title语义匹配的问题。简化后,本次题目内容主要为一个实时搜索场景下query-title的ctr预估问题。

0 分数

(1) A榜:0.7347
(2) B榜:0.7335
(3) 比赛网址:https://tianchi.aliyun.com/competition/introduction.htm?spm=5176.11409106.5678.1.2c547b6fmKviKy&raceId=231688
(4) 数据下载地址:链接:https://pan.baidu.com/s/1JdjA0cMijrqTCWpaCGMaYA 提取码:vg19

1 baseline 共享网址

(1) 天池-OGeek算法挑战赛baseline(0.7016) https://zhuanlan.zhihu.com/p/46482521
(2) OGEEK算法挑战赛代码分享 https://zhuanlan.zhihu.com/p/46479794
(3) GrinAndBear/OGeek: https://github.com/GrinAndBear/OGeek
(4) flytoylf/OGeek 一个lgb和rnn的代码: https://github.com/flytoylf/OGeek
(5) https://github.com/search?q=OGeek
(6) https://github.com/search?q=tianchi_oppo
(7) https://github.com/luoling1993/TianChi_OGeek/stargazers

2 CTR 参考资料

(1) 推荐系统遇上深度学习: https://github.com/princewen/tensorflow_practice
(2) 推荐系统中使用ctr排序的f(x)的设计-dnn篇: https://github.com/nzc/dnn_ctr
(3) CTR预估算法之FM, FFM, DeepFM及实践: https://github.com/milkboylyf/CTR_Prediction
(4) MLR算法: https://wenku.baidu.com/view/b0e8976f2b160b4e767fcfdc.html

3 nlp 参考资料

(1) 用深度学习(CNN RNN Attention)解决大规模文本分类问题 - 综述和实践 https://zhuanlan.zhihu.com/p/25928551
(2) 知乎“看山杯” 夺冠记:https://zhuanlan.zhihu.com/p/28923961
(3) 2017知乎看山杯 从入门到第二 https://zhuanlan.zhihu.com/p/29020616
(4) liuhuanyong https://github.com/liuhuanyong
(5) Chinese Word Vectors 中文词向量 https://github.com/Embedding/Chinese-Word-Vectors 注释:这个链接收藏语料库

4 其他比赛总结参考链接

(1) ML理论&实践 https://zhuanlan.zhihu.com/c_152307828?tdsourcetag=s_pctim_aiomsg

5 未整理思路

(1) 主线思路:CTR思路,围绕用户点击率做文章(如开源中:单字段点击率,组合字段点击率等等) (FM, FFM模型,参考腾讯社交广告比赛??)
(2) 文本匹配思路(Kaggle Quora) 传统特征:抽取文本相似度特征,各个字段之间的距离量化 https://www.kaggle.com/c/quora-question-pairs https://github.com/qqgeogor/kaggle-quora-solution-8th https://github.com/abhishekkrthakur/is_that_a_duplicate_quora_question
(3) 深度学习模型(1DCNN, Esim, Decomp Attention,ELMO等等): https://www.kaggle.com/rethfro/1d-cnn-single-model-score-0-14-0-16-or-0-23/notebook https://www.kaggle.com/lamdang/dl-models/comments 更多文本匹配模型见斯坦福SNLI论文集:https://nlp.stanford.edu/projects/snli/
(4) 文本分类**:主要是如何组织输入文本?另外query_prediction权重考虑? 传统特征:tfidf,bow,ngram+tfidf,sent2vec,lsi,lda等特征
(5) 深度学习模型: 参考知乎看山杯(知乎)以及Kaggle Toxic比赛

https://www.kaggle.com/c/jigsaw-toxic-comment-classification-challenge
https://www.kaggle.com/c/jigsaw-toxic-comment-classification-challenge/discussion/52557
https://www.kaggle.com/larryfreeman/toxic-comments-code-for-alexander-s-9872-model/comments
https://www.kaggle.com/c/jigsaw-toxic-comment-classification-challenge/discussion/52702

(6) Stacking无效(模型个数限制),简单Blending,NN+LightGBM的方案比较靠谱?
(7) PS1:词向量可使用word2vec训练或者使用公开词向量数据:https://github.com/Embedding/Chinese-Word-Vectors PS2:分词需要加上自定义词典,分词质量对模型训练很重要!

6 基本思考

(1):如何选用一些泛化能力分类器 -> logistic regression; support vector machine; linear regression
(2):如何构造文本特征 -> nlp分析
(3):如何解决特征稀疏问题 -> deep-fm

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