similar to: Complete GSOC idea

Hi Parth, I implemented DFR algorithms in Xapian as a part of GSOC last year under the mentorship of Olly. This year, I want to work on analyzing and optimizing the performance of the DFR algorithms and comparing them with BM25.I also want to work on profiling the query expansion schemes and test the relevance(precision and recall) / speed(time taken) of the

Hello guys.I just read up about tf-idf schemes and want to implement it in Xapian (with some frequently used normalizations) as it will also give me a good hang of implementing a weighting scheme before I start working on implementing DFR schemes. I read the following as references and I think Ive understood it well and can write the hack :- 1.)

Hello guys.I am working on implementing the PL2 weighting scheme of the DFR framework by Gianni Amati. It uses the Poisson approximation of the Binomial as the probabilistic model (P), the Laplace law of succession to calculate the after effect of sampling or the risk gain (L) and within document frequency normalization H2(2) (as proposed by Amati in his PHD thesis). The formula for w(t,d) in

Hi All, I am interested in applying for the two projects listed in the Xapian Gsoc 2019 project idealist: "Learning to Rank Stabilisation" and "Weighting Schemes". I have downloaded the codebase and going through some of the commits related to Letor API, BM25, and DFR weighting schemes. Can anyone tell me how to write about the formal proposal for the above-mentioned projects?

Hey guys,hi.:) I've finished implementing the PL2 scheme . The bounds I have implemented for it are as good as I could, given the nature of the scheme and my mathematical skills.However,tight bounds for other named DFR schemes will be easier to implement because their forumlas are quite simpler compared to PL2 . Will send in a pull request in a couple of days once I'm done with the tests

Hello, I'm Shivang Bansal, a 3rd year Computer Science Engineering undergraduate at Institute of Engineering & Technology in Lucknow, India. This mail is an expression of my interest for Google Summer of Code program of this year. I want to apologize for getting in so late. Actually I would have contacted earlier, but sudden demise of my Grandfather disabled me in doing so. I am

Greetings everyone. My name is Chandan and I am a Junior student from National Institute of Technology, Nagpur, India. I have come to know that Xapian is participating in Google Summer of Code this year. I am interested in contributing to Xapian. I have gone through the project ideas list and found some of them really interesting. I am particularly interested in the project on *Weighting Schemes

Hi, guys I am Wenjin from Graduate School of Chinese Academy of Science, pursing a master degree and my current research interests including using Data mining and Information retrieve technology to analysis software engineering (SE) data and support SE. I have great interested in "Weight Schemes" project. and in the last few days I have learnt some detail about DFR model family by

Hi, I'm Michael, I would like to participate in this year's Google Summer of Code, and I picked Xapian as the project to code for. Before writing a full proposal, I want to get in contact with the community, as well as introducing myself and discuss my ideas for the contribution to Xapian. First of all I'd like to talk about my motivation. I'm currently working on a webapp

Hi, I'm Michael, I would like to participate in this year's Google Summer of Code, and I picked Xapian as the project to code for. Before writing a full proposal, I want to get in contact with the community, as well as introducing myself and discuss my ideas for the contribution to Xapian. First of all I'd like to talk about my motivation. I'm currently working on a webapp

Hi all, I am Prajwal, a sophomore Undergraduate student from IIT Bombay, India. I want to contribute to Xapian through GSoC 2012. Specifically I am interested in the Weighting Schemes project. I have not yet taken any IR related course, but IR and NLP have always been my academic interests. I want to learn more about these topics, and I think that this is the best opportunity to do so. I

Hello guys. I just ran the updated tests for PL2 and they are not giving the mset order I expect.Now,the thing is, dfr's behavior is a bit hard to predict and so even if I expect a particular order ,it may give another order and still be correct.So,the only way to write correct tests for PL2 is to manually calculate the weight of the documents to decide the expected order.For that,I need to

Hello Guys. I have updated the code,tests,documentation,makefile entries and the registry entry of the* *TfIdf patch as per the feedback.Please do let me know if any additional changes are required before the patch can be merged, -Regards -Aarsh On Sun, Mar 3, 2013 at 2:50 PM, aarsh shah <aarshkshah1992 at gmail.com> wrote: > Hello guys.I have sent a pull request for the code and

Hi, While searching for a project which matches my interest andskill level, I found this project named Matcher Optimization. This project is really challenging and excting from my view point and I would like to be a part of this project. Optimization techniques metioned in the reference links provided will take some time for me to have a good understanding about them. But I am trying to get my

Hi James, > We probably don't want them committed in git where they're evaluation > runs (because we can recreate them); a gist might be more appropriate. Sorry, I have moved results files over to gist for each individual weighting scheme. Link: https://gist.github.com/ivmarkp/secret > I can't tell, but are some of those files from FIRE? If so, they > shouldn't be

Hi, I am Abhishek Currently Xapian::Weight follows BM25 scheme, many models such as the Divergence from Randomness (DfR) family of models, Unigram Language Model and the Bi-gram Language Model implemented two years ago in GSoc 2012 yet not merged to the master. The new weighing schemes or improvement in implementing the previous models to change the default scheme of BM25 from SMART with

Hello everyone! I'm Ayush Tomar, junior undergrad in Computer Science from New Delhi, India. I love C++ coding and working on machine learning and information retrieval project. I was exploring the GSoC ideas for Xapian and the project on "Adding Weighting Schemes" looked really interesting to me. I wanted to work on text mining/IR this summer and this idea seems perfect! I have

Tf-idf is most used used weighting scheme is easy to understand and has been used in other frameworks like lucene and many other places. okapi bm25(implemented in xapian) is theoretically better/improved measure than tf-idf and i am looking into various other weighting scheme which are there in xapian or can be implemented like TF-ICF(term frequecy inverse corpus frequency),TF-RF(term

Hi all, I have evaluated new weighting schemes along with their existing counterparts in Xapian to compare and see which one does better job. Also, I have put together all the results files for easy access here: https://github.com/ivmarkp/xapian-evaluation/tree/evaluation/run and a README for getting started with xapian-evaluation module. Hopefully, it might be of help to those who are new to

Hi Xapianers: My name is Weixian Zhou, Computer Science student of University at Buffalo, State University of New York. I am interested in the project of posting list encoding improvements and weighting schemes. I have some questions toward them. 1) After read the comments in brass_postlist.cc, I am still not very clear about the detailed structure of postings list. If you can provide some simple