Alexandre Passos - user overview

Alexandre Passos ♦

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karma

Registered user
real name	Alexandre Tachard Passos
member since	Jun 29 '10 at 20:40
last seen	Sep 09 '14 at 00:00
user's website	http://atpassos.me/
location	Amherst, MA

I'm a member of the IESL lab, studying with Andrew McCallum

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39 Questions

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Derivation of the Bethe entropy

Sep 13 '13 at 16:52 zaxtax ♦1051●12●25●45 (asked by Alexandre Passos ♦25541●54●278●421 )

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Regarding PAC-Bayes and SVMs

Sep 27 '12 at 21:04 Alexandre Passos ♦25541●54●278●421

bounds learning-theory

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High-accuracy graph-based semi-supervised learning?

Apr 01 '12 at 11:54 Alexandre Passos ♦25541●54●278●421

graphs semi-supervised accuracy

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Efficient nearest neighbors in a very sparse setting

Aug 06 '12 at 00:56 Alexandre Passos ♦25541●54●278●421

nearest-neighbors lsh inverted-indices

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Practical evidence for gradient-free stochastic approximation

Mar 07 '12 at 11:16 denis281●2●8●12 (asked by Alexandre Passos ♦25541●54●278●421 )

online-learning convex-optimization stochastic-gradient

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Sparse coding for the jvm?

Jan 26 '12 at 10:57 Alexandre Passos ♦25541●54●278●421

implementation java jvm sparse-coding lasso

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A guide to recent active learning research

Jan 18 '12 at 11:48 spinxl393698●11●48●69 (asked by Alexandre Passos ♦25541●54●278●421 )

references active-learning

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10123

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What is the Bayes point machine?

Jan 11 '12 at 11:18 Alexandre Passos ♦25541●54●278●421

bayesian bayes-point-machine classification

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Where is my mistake, or can the variational lower-bound on the log-likelihood be zero?

Apr 01 '11 at 06:04 Alexandre Passos ♦25541●54●278●421

bayesian graphical-models variational-inference

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How would you maximize a sum of log-probabilities?

Mar 16 '11 at 06:49 Alexandre Passos ♦25541●54●278●421

log-linear optimization constrained probability

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How can I write the density function of the dirichlet process?

Feb 09 '11 at 09:54 Philemon Brakel2445●10●35●60 (asked by Alexandre Passos ♦25541●54●278●421 )

bayesian dirichlet-process mixture variational-inference

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Expectation of the dot product of a multivariate normal vector

Jan 04 '11 at 23:01 Ryan Turner256●4●8●12 (asked by Alexandre Passos ♦25541●54●278●421 )

calculus expectations

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On the expectations necessary to do variational inference for LDA

Dec 30 '10 at 03:36 Alexandre Passos ♦25541●54●278●421

lda topic-models derivation-help variational-inference

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What are some relevant papers in one-class learning and outlier detection?

Dec 03 '10 at 07:16 Alexandre Passos ♦25541●54●278●421

svm one-class outlier density novelty references

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What are the main advantages and disadvantages of dual decomposition versus A* (and search-based methods) for NLP applications?

Oct 12 '10 at 19:21 Alexandre Passos ♦25541●54●278●421

a-star nlp search dual-decomposition

View all questions by Alexandre Passos

749 Answers

Finding positions of vectors in n-dimensional space based on distances between them?

Do algorithms like k-means always converge ?

How to find a subgradient?

As a beginner, I would like to solve convex quadratic maximization problem with a gradient descent variant in probability simplex?

Matrix regularized linear SVM

Basics of a multiclass perceptron

Stochastic Gradient vs. Batch

Conjugate gradient with multiple right hand sides

Shearing normalization improves Kernel SVM performance

Co-relation between naive Bayes probability and classification accuracy

Finding top two best structures in structured inference?

Potentials and Messages in Graphical Models

What is the meant by discriminative training of a generative model (like HMM)?

How to derive an objective function for estimating multinomial parameters

Does zero-mean-unit-variance standardization have an influence on knn?

derivative of variational lower bound w.r.t variational paramters or variational distributions

Is it worth visiting conferences like ICML or NIPS?

Are there any deep learning algorithms where the order of the inputs matters? Perhaps making them similar to Hierarchical HMMs

'Alternating' descent

Confusion: different definitions of MAP estimation in Graphical Models (MRFs)

Comparing multiclass classification algorithms for a particular application

Maxout Network Activation Function

Should metric on Test and Train data be comparable in ML problem?

Adapting threshold to minimize ampirical risk

Does Lagrange multiplier solve quadratical equality constraint linear program or need KKT?

Confusion about thresholding for solving lasso problem

Is HMM a special case of a Linear dynamical system

Feature Selection similar to setting feature values to 0?

Comparison with "generalized expectation criteria"

View all questions answered by Alexandre Passos

1026 Votes

941

sampling × 37
variational-inference × 35
regression × 32
neural-networks × 30
crf × 29
mcmc × 28
statistics × 27
inference × 26
evaluation × 25
dirichlet × 24

state-of-the-art × 24
regularization × 23
similarity × 23
deep-learning × 21
learning × 21
gibbs-sampling × 20
online-learning × 20
probability × 20
data-mining × 20
paper-understanding × 20

dataset × 19
kernel × 19
logistic-regression × 19
natural-language-processing × 19
python × 18
semi-supervised × 18
data × 17
lsh × 17
gibbs × 17
search × 17

model × 16
markov-random-field × 16
topic-models × 16
pca × 15
features × 15
text-classification × 14
gradient-descent × 14
kl-divergence × 14
learning-theory × 14
dimensionality-reduction × 14

24 Kudos

● Appreciated Answer × 337
● Cognoscenti × 105
● Esteemed Answer × 101
● Well-Known Question × 39
● Prominent Question × 39
● Conspicuous Question × 39

● Appreciated Question × 29
● Prized Question × 15
● Esteemed Question × 15
● Adulated Answer × 12
● Auto-Didact × 5
● Adulated Question × 3

● Cherished Question × 3
● Pronouncement × 1
● Discriminating × 1
● On the record × 1
● Revisitation × 1
● Revisionist × 1

● Commentator × 1
● Inquisitive × 1
● Participant × 1
● Advocate × 1
● Mentor × 1
● Guide × 1

Registered user

39 Questions

749 Answers

1026 Votes

50 Tags

24 Kudos