This presentation focuses on Feature Engineering and the Heuristics which can be extracted pre modelling whihc can be used post modelling for change detectors, explain ability etc.
In this talk, I have explained about feature selection, extraction with emphasis to image processing. Methods such as Principal Component Analysis, Canonical ANalysis are explained with numerical examples.
Do you need to process sequential and structure data (e.g. structured logs)? Use off-the-shelf pattern mining techniques to mine patterns from data and use the mined patterns as features (in combination with classic data mining / machine learning techniques).
http://research.microsoft.com/apps/pubs/default.aspx?id=1883
http://research.microsoft.com/en-us/events/dapse2013/
In this talk, I have explained about feature selection, extraction with emphasis to image processing. Methods such as Principal Component Analysis, Canonical ANalysis are explained with numerical examples.
Do you need to process sequential and structure data (e.g. structured logs)? Use off-the-shelf pattern mining techniques to mine patterns from data and use the mined patterns as features (in combination with classic data mining / machine learning techniques).
http://research.microsoft.com/apps/pubs/default.aspx?id=1883
http://research.microsoft.com/en-us/events/dapse2013/
Learning from Data - Various Approaches - Postermadhucharis
Big Data, Thick Data, Wide Data, Structured Neural Learning
Knowledge Representation, Graph and Neural Learning
Collage from different Images, to emphasize the Theme
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Adjusting primitives for graph : SHORT REPORT / NOTESSubhajit Sahu
Graph algorithms, like PageRank Compressed Sparse Row (CSR) is an adjacency-list based graph representation that is
Multiply with different modes (map)
1. Performance of sequential execution based vs OpenMP based vector multiply.
2. Comparing various launch configs for CUDA based vector multiply.
Sum with different storage types (reduce)
1. Performance of vector element sum using float vs bfloat16 as the storage type.
Sum with different modes (reduce)
1. Performance of sequential execution based vs OpenMP based vector element sum.
2. Performance of memcpy vs in-place based CUDA based vector element sum.
3. Comparing various launch configs for CUDA based vector element sum (memcpy).
4. Comparing various launch configs for CUDA based vector element sum (in-place).
Sum with in-place strategies of CUDA mode (reduce)
1. Comparing various launch configs for CUDA based vector element sum (in-place).
Techniques to optimize the pagerank algorithm usually fall in two categories. One is to try reducing the work per iteration, and the other is to try reducing the number of iterations. These goals are often at odds with one another. Skipping computation on vertices which have already converged has the potential to save iteration time. Skipping in-identical vertices, with the same in-links, helps reduce duplicate computations and thus could help reduce iteration time. Road networks often have chains which can be short-circuited before pagerank computation to improve performance. Final ranks of chain nodes can be easily calculated. This could reduce both the iteration time, and the number of iterations. If a graph has no dangling nodes, pagerank of each strongly connected component can be computed in topological order. This could help reduce the iteration time, no. of iterations, and also enable multi-iteration concurrency in pagerank computation. The combination of all of the above methods is the STICD algorithm. [sticd] For dynamic graphs, unchanged components whose ranks are unaffected can be skipped altogether.
2. Data Science Life Cycle
1- Scale Wide Data
Explicit Feature
Selection
-Dimensionality
Reduction
Methods
2- Modelled Data
Implicit Feature
Selection
- Modelling
/Segmentation
Algorithms
3 – Un Checked Bounds
Unbounded at
Leaf Nodes
Un Checked
attributes -
greedy attribute
split
4- Un Processed Dimensions
Features Left in
Steps 1 ~3
5 - Unprocessed
Samples
Left by
Modelling
Algorithms to
Reduce Variance
3. Data Science Life Cycle
1- Scale Wide Data
Explicit Feature
Selection
-Dimensionality
Reduction
Methods
2- Modelled Data
Implicit Feature
Selection
- Modelling
/Segmentation
Algorithms
3 – Un Checked Bounds
Unbounded at
Leaf Nodes
Un Checked
attributes -
greedy attribute
split
4- Un Processed Dimensions
Features Left in
Steps 1 ~3
5 - Unprocessed
Samples
Left by
Modelling
Algorithms to
Reduce Variance
Extract Per Class Feature Heuristics
Automate Bound Checks
Automate - Confidence Score Generation
, Bound Check Violations
Configurable Bound Checks
Index
4. References – PHD Thesis / Book
• Feature Selection Problem • Feature Selection for High
Dimensional Data