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分享两个刚刚面试的modeling问题
[版面:数据科学][首篇作者:beidaruifeng] , 2018年10月23日15:45:08 ,3137次阅读,7次回复
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beidaruifeng
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发信人: beidaruifeng (Fengzi), 信区: DataSciences
标  题: 分享两个刚刚面试的modeling问题
发信站: BBS 未名空间站 (Tue Oct 23 15:45:08 2018, 美东)


Display advertising is a billion dollar level effort
and one of the central uses of machine learning on the Internet.
However, its data and methods are usually kept under lock and key.
Amex has a worth of data collected from different channels throughout
customer’s entire web browsing journey.


1) Given a user and the product page he is visiting,
and given that there are five products displayed on this page,
predict which he/she will click on
2) Please also predict a user’s click journey.
Specifically, given a sequence of k clicks, predict the next,
or k+1 click

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fenice420
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发信人: fenice420 (fenice420), 信区: DataSciences
标  题: Re: 分享两个刚刚面试的modeling问题
发信站: BBS 未名空间站 (Wed Oct 24 15:13:00 2018, 美东)

1). classification problem. Multinomial logistic regression?

2). markov chain problem. Transition matrix model? or Survival Analysis?
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magliner
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发信人: magliner (magliner), 信区: DataSciences
标  题: Re: 分享两个刚刚面试的modeling问题
发信站: BBS 未名空间站 (Sat Oct 27 14:10:08 2018, 美东)

第二个比较难。 第一个也得看输入都是些什么变量。 如果题目真是amex卖产品, 5张
信用卡让用户选,不觉得和在线广告有什么关系。

在线广告是个bidding process, 你弄个高级算法,算出来比别人晚了两毫秒,就被别
人抢了先了。
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ExpressoLove
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发信人: ExpressoLove (MoneyForNothing), 信区: DataSciences
标  题: Re: 分享两个刚刚面试的modeling问题
发信站: BBS 未名空间站 (Mon Oct 29 01:18:57 2018, 美东)

Association rule or one of recommendation algorithms?
【 在 beidaruifeng (Fengzi) 的大作中提到: 】
: Display advertising is a billion dollar level effort
: and one of the central uses of machine learning on the Internet.
: However, its data and methods are usually kept under lock and key.
: Amex has a worth of data collected from different channels throughout
: customer’s entire web browsing journey.
: 1) Given a user and the product page he is visiting,
: and given that there are five products displayed on this page,
: predict which he/she will click on
: 2) Please also predict a user’s click journey.
: Specifically, given a sequence of k clicks, predict the next,
: ...................



--
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ExpressoLove
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发信人: ExpressoLove (MoneyForNothing), 信区: DataSciences
标  题: Re: 分享两个刚刚面试的modeling问题
发信站: BBS 未名空间站 (Mon Oct 29 01:28:13 2018, 美东)

Association rule or one of recommendation algorithms?
【 在 beidaruifeng (Fengzi) 的大作中提到: 】
: Display advertising is a billion dollar level effort
: and one of the central uses of machine learning on the Internet.
: However, its data and methods are usually kept under lock and key.
: Amex has a worth of data collected from different channels throughout
: customer’s entire web browsing journey.
: 1) Given a user and the product page he is visiting,
: and given that there are five products displayed on this page,
: predict which he/she will click on
: 2) Please also predict a user’s click journey.
: Specifically, given a sequence of k clicks, predict the next,
: ...................



--
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sharpTech
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发信人: sharpTech (xinJing), 信区: DataSciences
标  题: Re: 分享两个刚刚面试的modeling问题
发信站: BBS 未名空间站 (Thu Nov 15 13:37:15 2018, 美东)

Thanks for sharing.
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alonzo
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发信人: alonzo (alonzo), 信区: DataSciences
标  题: Re: 分享两个刚刚面试的modeling问题
发信站: BBS 未名空间站 (Fri Feb  1 11:58:58 2019, 美东)

Obviouly the 1st question is emplying Classfication and the 2nd is applying
Prediction function.

While I don't think the second one is more difficult than that first one.
What's more, NN is much better in terms of the prediction precise and time-
consuming than Markov chain.

There are more advanced algorithms which could be employed here. Please do
research.
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beidaruifeng
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发信人: beidaruifeng (Fengzi), 信区: DataSciences
标  题: Re: 分享两个刚刚面试的modeling问题
发信站: BBS 未名空间站 (Fri Feb  1 14:15:57 2019, 美东)

当时秒挂了,谢谢大家的讨论
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