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SUMMARY:CIDeR-ML General Meeting
DTSTART:20260828T000000Z
DTEND:20260829T024500Z
DTSTAMP:20260831T082200Z
UID:indico-event-10692@indico.slac.stanford.edu
DESCRIPTION:https://u-tokyo-ac-jp.zoom.us/j/83932834349Link to Recording\n
 \n\nQuick recap\nThe meeting focused on updates and discussions regarding 
 the angular response analysis using SIREN and cosmic data\, as well as the
  performance evaluation of different SIREN models for PMT waveform predict
 ion. Zhenxiong presented updates on generating angular responses using SIR
 EN\, comparing methods with cosmic analysis and diffused LED data\, and no
 ted that while SIREN results were less sensitive to delamination than LED 
 data\, they still showed differences from cosmic analysis. Junjie shared d
 etailed findings on the performance of three different SIREN models (singl
 e MLP PCA\, dual PCA\, and quantile models) trained on various input/outpu
 t formats\, highlighting that while models performed well for peak visibil
 ity regions\, they showed biases in high and low visibility tails\, partic
 ularly near PMT surfaces. The team discussed potential solutions including
  regularization on the omega parameter and using Poisson loss instead of H
 uber loss to improve model performance.\nNext steps\nZhenxiong\n\nSend the
  draft of the WCTE presentation to Patrick de by the end of tomorrow.\nTry
  the "shell method" with the cosmic analysis to compare with current resul
 ts.\n\nJunjie\n\nTest using Poisson loss instead of Huber loss for Siren t
 raining\, especially for low-visibility voxels.\nInvestigate applying regu
 larization on the omega parameter in Siren\, possibly in a voxel or distan
 ce-dependent way\, to address overfitting issues.\n\nSummary\nAngular Resp
 onse Analysis Updates\nZhenxiong presented updates on the Angular response
  analysis using cosmic data from WCTE\, comparing pre-tuned and post-tuned
  SIREN models with cosmic analysis and diffused LED data. The analysis sho
 wed that while SIREN results were similar to cosmic analysis and not sensi
 tive to delamination\, they still differed from the diffused LED results\,
  particularly in the low cosine theta range. Zhenxiong noted challenges wi
 th the shell method due to boundary effects and detector curvature\, and p
 lanned to present these findings at WCTE for further discussion.\nSiren Pe
 rformance Analysis Review\nJunjie presented a detailed analysis of sirenTV
 's performance across three different scientific models with varying input
 /output methods and architectures. The models showed generally good perfor
 mance in predicting visibility and waveform quantiles\, with the dual PCA 
 model performing best overall. However\, significant biases were identifie
 d in both high and low visibility regions near PMTs\, particularly within 
 20 centimeters of the wall\, and in early quantile bins. Junjie proposed p
 otential solutions including applying regularization to the omega paramete
 r and using Poisson loss instead of Huber loss to better handle low visibi
 lity voxels. The team discussed the possibility of exploring these improve
 ments further and agreed to review the detailed bias analysis plots for po
 tential applications to WC Siren studies.\n\n\n\nhttps://indico.slac.stanf
 ord.edu/event/10692/
URL:https://indico.slac.stanford.edu/event/10692/
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