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Description: This package includes the JAVA code of the PORM algorithm [1] for minimizing the ratio f/g of two monotone set functions. It uses a randomized iterative procedure to solve the bi-objective reformulation of the original problem: minimizing f and maximizing g. A Readme file and an example file are included in the package. In the '', you will find an example of using this code for the application of F-measure maximization in information retrieval.


[1] Chao Qian, Jing-Cheng Shi, Yang Yu, Ke Tang and Zhi-Hua Zhou. Optimizing ratio of monotone set functions. In: Proceedings of the 26th International Joint Conference on Artificial Intelligence (IJCAI'17), Melbourne, Australia, 2017.

ATTN: This package is free for academic usage. You can run it at your own risk. For other purposes, please contact Prof. Zhi-Hua Zhou (

Requirement: The package was developed with JAVA.

ATTN2: This package was developed by Mr. Jing-Cheng Shi ( and Dr. Chao Qian ( For any problem concerning the code, please feel free to contact Mr. Shi or Dr. Qian.

Download: code (8KB)
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