Adam Mallen Work Log

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Revision as of 01:24, 20 January 2011 by Amallen (talk | contribs) (→‎1/19/11)
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Work Log


5 hrs, 30 mins.

  • Cleaned up the code a lot. Previously, an entirely different cloud of particles (with different realizations of the random noise process used during integration) was used for the Lagrangian frame, instead of just appropriately rotating the cloud to get the Lagrangian frame. The particle filter now uses the same cloud for plotting the movement of the cloud in both frames, but simply rotates the axes through time according to the constant angular velocity of the rotation of the vortices.
  • Particle filter now computes and records a time series of the variances of the distributions of particles (for each state variable).


  • Tested code in Octave. It works!
  • TODO: Create script to save parameters as a text file or something.


2:00 - 7:30

  • Created my Wiki page.
  • Organized research files.
  • Created generic particle filter function to accept parameters as arguments. Only allows two vortices of unknown strength.
  • Set up experiment script to run multiple simulations and save the resulting distribution of error time series. Each experiment now uses the same seed for random number generation.

Meeting with Dr. Spiller

  • Set up 2:30 meetings on Tuesdays and Fridays.
  • Need to use the same parameters as Chris's paper and same criteria for 'filter divergence' and see if I get the same results.
  • Systematically look at the change in the error distributions as the initial distribution of particles changes.
  • Test code in 'Octiv'.
  • Email Feng Xishou for 'Pere' cluster permission.