<div style="text-align: center;" markdown="1">Researches</div>

[**:house: Home**](https://hackmd.io/s/rkkDP_l4M) | [:boy: **About**](https://hackmd.io/s/B149Z8v7b) | [**:microscope: Researches**](https://hackmd.io/s/rJPFNKlVz) | [**:rocket: Side projects**](https://hackmd.io/s/H1aS2qe4G) | [**:airplane: Life gallery**](https://hackmd.io/s/HJN4JslNM) --- # <div style="text-align: center;" markdown="1">Researches</div> *<div style="text-align: center;" markdown="1"> `HEP` `big data` `statistics` `Energy Network`</div>* Here I wrote the introductions for my current work (Gogoro, since 2018) and Ph.D publications (CERN, 2011~2017). The Gogoro two [journal publications](#Journal-Publication) and the approved results by CERN ([CERN Approval](#CERN-Approval)), during my Ph.D candidate and researcher at CERN for the [High Energy Physics](#High-Energy-Physics). They are about the **big data** analysis. Hope these friendly and simple contents can help reader to enjoy! :smile: ## Energy Netwrok of Electrical Vehicle (since 2018) #### Mathematical Model Development **<div style="text-align: center;" markdown="1">**[<img src="https://i.imgur.com/aII2KBH.jpg" height="250"><br>\[Queue Theory\] Energy Service Model of Bettary-Swap Platform](https://hackmd.io/s/HykFLJTkX) <br>*`math` `statistics`*</div> ## High Energy Physics (2011~2017) High energy physics (HEP) is a field trying to discover the deep mystery of our universe. Several popular topics in the HEP are still unknown and waiting for us to figure out, e.g. how does the mess come from? where is the anti-matter? what happens right after the big bang? etc... That remains a lot of questions when the human look at the universe. The well-known model provide the basic concept for these puzzles is the ***Standard Model***, which was the ensemble of several theories about the interactions of the "**forces**" within the "**fundamental particles**". <div style="text-align: center;" markdown="1"><img src="https://i.imgur.com/1UwRm8K.png" height="250"></div> <br> The physicists believe that the understanding of the particles helps us to know about the universe. Several experiments thus are designed and on-going for this exciting field. There are varied detections around the world for the cosmic rays, nuclear-power factories, accelerators etc... The biggest accelerator in the world where I was involved is the [*Large Hadron Collider (LHC)*](https://home.cern/topics/large-hadron-collider) located at CERN, Geneva, Switzerland. It accelerate the two bunches of proton to nearly the speed of light (~0.99999C) and collides them. Since they carry the extremely high energy, the collision mimics the *big bang* when the universe was created. The fragments provide the valuable information about the particles and begin of universe. The information is collected and stored by the detectors with the electronic digits, and then they are reconstructed to particles kinematic information. Thus, that data is big enough (well..., never enough actually) to be analyzed by experimental physicists with statistics and physics models. I am a experimental physicist and specialize the **statistical data analysis** for the HEP. Here are my researches with the **big data** (petabyte scale) collected by [*Compact Muon Solenoid (CMS) Collaboration*](https://cms.cern) at LHC. They have been reviewed and published by international journals and CERN. The details about the techniques and theories can be found in their references. The software for achieving the analysis are basing on the ***C++*** and ***python*** programing languages, they were processed on the CERN grid-server system. The data visualization is made by [***ROOT***](https://root.cern.ch/) which is a powerful tool for dealing with the statistics in particle physics and cosmology. #### Journal Publication **<div style="text-align: center;" markdown="1">**[<img src="https://i.imgur.com/cq60xCh.png" height="250"><br>\[Regression\] Top-qaurk CP violation in LHC data](https://hackmd.io/s/BJl6iAVVz) <br>*`chi-square` `likelihood` `Monte Carol` `asymmetry` `statistics`*</div> <br> **<div style="text-align: center;" markdown="1">**[<img src="http://hep1.phys.ntu.edu.tw/~alpha78718/cv/bprimetobH.png" height="200"><br>\[Statistics\] b' quarks decaying to b quark and Higgs boson in LHC data](https://hackmd.io/s/S1mZHTeNb) <br>*`upper limit` `background model` `Monte Carol` `statistics`*</div> #### CERN Approval **<div style="text-align: center;" markdown="1">**[<img src="http://hep1.phys.ntu.edu.tw/~alpha78718/cv/esiter.png" height="250"><br>\[Algorithm\] Preshower Detector Alignment](https://hackmd.io/s/B1DKRSJNb) <br>*`gradient decent` `minimum chi-squared` `rotation matrix` `statistics`*</div> <br> **<div style="text-align: center;" markdown="1">**[<img src="http://hep1.phys.ntu.edu.tw/~alpha78718/cv/dbtagroc.png" height="200"><br>\[Validation\] Double b-tagging performance](https://hackmd.io/s/S1e34lSEG) <br>*`ROC` `efficiency` `error propagation` `Monte Carol` `statistics`*</div> <br> **<div style="text-align: center;" markdown="1">**[<img src="http://hep1.phys.ntu.edu.tw/~alpha78718/cv/btagging.png" height="200"><br>\[Validation\] b-tagging commissioning](https://hackmd.io/s/rkavdgSEG) <br>*`likelihood` `classification` `Monte Carol` `statistics` `collaboration`*</div> <br> --- [:ghost: Github](https://github.com/juifa-tsai) | [:busts_in_silhouette: Linkedin ](https://www.linkedin.com/in/jui-fa-tsai-08ba0a93)