Marcus Lewis

Two parts computer science, one part neuroscience.

Recent blog posts

Bayesian Optimization Is More Basis-Dependent Than You Might Think
2022-06-26

Some "Causal Inference" intuition
2022-03-23

Likely ≠ Typical: A Viewpoint On Why We Perturb Neural Networks
2022-01-28

Select talks / presentations

Intro to Grid Cells + Quickly Forming Structured Memories
2021-06-07

Testing a possible explanation for grid cell distortions
2021-05-17

Journal Club: Hinton's GLOM + Numenta's TBT (after a year without a haircut)
2021-03-24

Using grid cells as a prediction-enabling basis
2020-12-22

The Minimum Description Length Principle, sparsity, and quantization
2020-04-01

Papers

Hippocampal Spatial Mapping As Fast Graph Learning
Marcus Lewis
Poster at 30th Annual Computational Neuroscience Meeting (2021)
Efficient and flexible representation of higher-dimensional cognitive variables with grid cells
Mirko Klukas, Marcus Lewis, Ila Fiete
PLOS Computational Biology (2020)
A Framework for Intelligence and Cortical Function Based on Grid Cells in the Neocortex
Jeff Hawkins, Marcus Lewis, Mirko Klukas, Scott Purdy, Subutai Ahmad
Front. Neural Circuits (2019)
Locations in the Neocortex: A Theory of Sensorimotor Object Recognition Using Cortical Grid Cells
Marcus Lewis, Scott Purdy, Subutai Ahmad, Jeff Hawkins
Front. Neural Circuits (2019)

Other projects, big and small

Using Grid Cells for Coordinate Transforms
Marcus Lewis
Poster, Grid Cell Meeting 2018, UCL, London, England
Grid cells: Visualizing the CAN model
A weekend in April 2017
See HTM run: Stacks of time series
Written while living in hostels. February 2016
A visual running environment for HTM
Collaboration with Felix Andrews. November 2015

All blog posts

Bayesian Optimization Is More Basis-Dependent Than You Might Think
2022-06-26

Likely ≠ Typical: A Viewpoint On Why We Perturb Neural Networks
2022-01-28

Some "Causal Inference" intuition
2021-11-04

Grid cells: Visualizing the CAN model
2017-04-16

Appendix: The classic TP
2016-05-05

The Life and Times of a Dendrite Segment
2016-04-28

The column SDR that wasn't random enough
2016-03-31

HTM time series: Column overlaps and boosting
2016-03-13

See your HTM run: Stacks of time series
2016-02-15

HTM time series: Now add synapse learning
2016-02-14

HTM time series: Two charts, one scale
2016-02-13

HTM time series: Number of dendrite segments
2016-01-31

HTM time series: Frequencies of column states
2016-01-16

How many coin-flips till heads?
2015-12-03

Three snapshots of Temporal Pooling
2015-10-12

Data flow: Visualizing big remote things, Part 2
2015-07-30

Data flow: Visualizing big remote things
2015-07-06

Using Bézier curves as easing functions
2015-02-26

Om Internals: Instances are getting reused. How?
2015-01-31

More

All posts | Twitter | Google Scholar | GitHub | LinkedIn | RSS