data day texas - recommendations
TRANSCRIPT
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I
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Job recommendations are significantly different
Rapid inventory growth - Millions of new jobs discovered every day
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Job recommendations are significantly different
Rapid inventory growth - Millions of new jobs discovered every day
~ 1.5 million new users visit indeed every day
![Page 18: Data Day Texas - Recommendations](https://reader033.vdocument.in/reader033/viewer/2022051520/58ed1a111a28ab8e208b46a3/html5/thumbnails/18.jpg)
Job recommendations are significantly different
Rapid inventory growth - Millions of new jobs discovered every day
~ 1.5 million new users visit indeed every day
Average lifespan of a job is ~30 days
![Page 19: Data Day Texas - Recommendations](https://reader033.vdocument.in/reader033/viewer/2022051520/58ed1a111a28ab8e208b46a3/html5/thumbnails/19.jpg)
Job recommendations are significantly different
Rapid inventory growth - Millions of new jobs discovered every day
~ 1.5 million new users visit indeed every day
Average lifespan of a job is ~30 days
One job posting usually meant to hire one individual
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Compute similarity
For ui In {Users}
For uj In {Users}
SIMi,j
= compute_similarity(ui,
uj)
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→
→
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∩ ∪
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Items[Ui] = {x
1, x
2, ..x
n}
H
minhashH(U
i)= min{ x∈Items
i| H(x) }
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Similarity(U1, U2) = 1, if minhash(U1) == minhash(U2)
Similarity(U1, U2) = 0, otherwise
This is an unbiased estimator
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Similarity(U1, U2) = 1, if minhash(U1) == minhash(U2)
Similarity(U1, U2) = 0,
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Hk
Hk
Prob(minhashH(U
i) == minhash
H(U
j)) = J(U
i, U
j)
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user → {job1, job2, job3,..}
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H = {H1, H
2, ..H
20}
for user in Users
for hash in H
minhash[hash] = min{x∈Itemsi| hash(x)}
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For ui In {Users}
For uj In {Users}
SIMi,j
= compute_similarity(ui,
uj)
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user1 → (111, 123, 134, 148, ..129)
user2 → (101, 123, 139, 148, ..135)
user3 → (191, 103, 126, 108, ..119)
user4 → (191, 103, 126, 108, ..129)
...
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user → {cluster}
cluster → {users}
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123 → (user1, user2)
148 → (user1, user2)
129 → (user1, user4)
191 → (user3, user4)
...
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→
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→
user1 → {job1, job2}
user2 → {job2, job3, job5}
123 → {user1, user2}
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→
user1 → {job1, job2}
user2 → {job2, job3, job5}
123 → {job1, job2, job3, job5}
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1. user → {cluster}
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user → {cluster} user1 → {111, 123, ..}
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111 → {job5, job2, job9}
123 → {job1, job2, job3, job5}
{job2, job5, job9, job1, job3}
→→
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{job2, job5, job9, job1, job3}
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1.
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→
→ {101, 121}
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→
→ {101, 121}
{“Software Engineer”,
“Java Developer”, “Python Developer”}
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→
→ {101, 121}
{“Software Engineer”,
“Java Developer”, “Python Developer”}
minhash({“Software Engineer”, “Java Developer”,
“Python Developer”}) → {99, 135}
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→
→ {101, 121}
{“Software Engineer”,
“Java Developer”, “Python Developer”}
minhash({“Software Engineer”, “Java Developer”,
“Python Developer”}) → {99, 135}
→ {99, 121}
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→
minhash({“Software Engineer”, “Java Developer”,
“Python Developer”}) → {99,121}
99 → add {“Software Engineer”, “Java Developer”,“Python Developer”}
121 → add {“Software Engineer”, “Java Developer”,“Python Developer”}
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{“Software Engineer”, “Java Developer”,
“Python Developer”} {99, 121}
99 → {“Software Engineer”, “Java Developer”, “Python Developer”}
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→ {99, 131}
{“Software Engineer”, “Java Developer”,
“Python Developer”}
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→
→
→
→
→
→
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