User:RaymondJoseph
Hi There!
Thanks for stopping by.
I'm Harry Raymond Joseph, a master's student in EECS at IIT Madras, India. This page is intended to serve as a journal to keep track of my development work at Ascend as part of GSoC 2015. Updates and some relevant aspects of the GSoC proposal I submitted to Ascend are made available below.
Timeline---------------------------------
Community bonding period (27th April to 25th May) - Installed Linux, and all other dependencies to prepare for coding. - Built Ascend on my 64-bit 15.04 Ubuntu system. Log File:Attached. - Reading the code in the Ksenija2 branch of the SVN repository.
GSoC Proposal-----------------------------
Organization: ASCEND Abstract: The IDA solver requires more refinements both in the numerical as well as user-facing aspects is desirable. One important issue is to do with EVENT syntax - which helps to model whole range of systems, in which parametric constants themselves change values with triggered events, or even more sophisticated systems in which constraint equations are added or deleted when a given event is triggered. This project attempts to strengthen the functionalities of the IDA solver. (* I'm using the proposal format, obtained from Carlos' GSoC 2012 proposal *)
About:
Master's student at TUM Germany/IITM India. Specializing in the numerical aspects in EECS, such as machine learning and probabilistic methods. Research enthusiast, few publications. Amateur poet and writer.
Email: raymond.harry@tum.de/raymond.joseph.7@gmail.com
Project Topic Numerical Algorithmic Enhancement: Dynamic Modelling in ASCEND
Basic Information URL link to your CV: https://drive.google.com/file/d/0B04lAfTBvrd0a1dWc3hPYnZQTkU/view?usp=sharing URL link to your personal blog/homepage: http://raymondjoseph7.wix.com/ctkotww Research page: http://dl.acm.org/author_page.cfm?id=92458619092
Milestones What are the goals of your project? How is your success with these goals measurable?
The main goal (Deliverable 1, D1) is to fully integrate IDA into ASCEND by providing and refining EVENT support syntax elements, especially ensuring that the integrator restarts efficiently after events are triggered with modified constraint equations. Secondary goals are: - Improve IDA numerical solver efficiency. (D2) - Refine existing code in the \ksenija2 branch. (D3) - Possible GUI improvements in the use of the IDA solver. (D4) - Event syntax for periodic events. (D5) - Implement model of the simple solar water heater system as a test case. (D6) - Make the documentation of migration and faq for users with applications. (D7)
What is your planning schedule for completing these goals?
Work plan
Week 1: Read up and understand IDA integration issues. Great sources and discussions have been documented on the integration issues. Week 2: Scrub existing \ksenija2 code. Week 3, 4 & 5: Implement advanced EVENT syntax, to complete integration of IDA into ASCEND. (D1) Week 6: Explore possible syntax architectural changes for the IDA solver problems. (D3) Week 7: Read latest cutting-edge research papers and see if new methods are available to increase solver efficiency. (Hint: Yes, more optimal methods are available, that perform better than the IDA solver adopted as part of the SUNDIALS project) (D2) Week 8: Implement solver improvements to make the IDA solver state-of-the-art. (D2) Week 9: GUI improvements. (D4) Week 10: Periodic events support syntax. (D5) Week 11: Buffer week for finalizing code, and running tests. Fix any bugs discovered. Week 12: Implement test case: solar water heater system. (D6) Week 13: Documentation and FAQs. (D7)
Project completed
Coding experience
Programming languages you have learnt, and how many lines of code, approximately, you have written in each.
C++ >1500 LoC (Lots of numerical methods experience. Monte-carlo methods, Newton-Raphson method, ODE simulation, etc.) MatLab >500 LoC (Lots of experience with advanced numerical methods. Example: water-filling, convex optimization using CVX, modified gradient-descent methods, linear algebra systems in communication, etc.) Java >400 LoC Python >1000 LoC (* Though most of it is classified. I worked as a data analytics programmer at a French startup, Tilkee *)
I also have lex/yacc experience. Used these to create my own 'business artifact modelling language' called BASQL. Based on SQL, the language was relatively successful, a paper on this was published at the IEEE ICES conference jointly with Youakim Badr. The language achieved great success and further research on this is being carried out by Youakim Badr at LIRIS-CNRS, INSA Lyon, France.
Some of these coding samples is provided in the URL. MatLab: https://drive.google.com/folderview?id=0B04lAfTBvrd0fjhuLWFBNHprOXpsdlhDbU5XSmd3WnNfa3JqakdXRFRScmxIYkdfeTJKWGc&usp=sharing
C++: https://drive.google.com/folderview?id=0B04lAfTBvrd0TWl2T1BBSXlFNDQ&usp=sharing
Have you written any ASCEND models? Please provide copies.
I have been able to write two successful (albeit, very simple models): 1. The first one is on the 'dynamics of love affairs' paper by (Felmlee and Greenberg). The model can be found here: https://drive.google.com/file/d/0B04lAfTBvrd0SjU2aHZTZ2lwYkE/view?usp=sharing The snapshot of the solved model is below: https://drive.google.com/file/d/0B04lAfTBvrd0RmRmTzh5MVQ2WmM/view?usp=sharing
2. The second model is the simple non-flow domestic solar water heater system. The model can be found here: https://drive.google.com/file/d/0B04lAfTBvrd0SjU2aHZTZ2lwYkE/view?usp=sharing The snapshot of the solved model is below: https://drive.google.com/file/d/0B04lAfTBvrd0TERrcG5nbS1kckU/view?usp=sharing