publications

2025

1. PhD Thesis

   

   RISC-V Low-Power Processors: Enhancing Matrix Computations and Deep Learning Convolution Algorithms

   Ramírez, Cristian

   2025

   Bib HTML

   @phdthesis{ramirez2025risc,
     abbr = {PhD Thesis},
     title = {RISC-V Low-Power Processors: Enhancing Matrix Computations and Deep Learning Convolution Algorithms},
     author = {Ramírez, Cristian},
     year = {2025},
     school = {Universitat Polit{\`e}cnica de Val{\`e}ncia},
     type = {PhD thesis},
     html = {https://riunet.upv.es/entities/publication/e3858291-a656-43bb-ab2f-fd3e159d3c73},
     url = {https://riunet.upv.es/entities/publication/e3858291-a656-43bb-ab2f-fd3e159d3c73},
     preview = {phd_tesis_mini.png},
     selected = {true},
     bibtex_show = {true}
   }

2024

1. 

   Communication-Avoiding Fusion of GEMM-Based Convolutions for Deep Learning in the RISC-V GAP8 MCU

   Ramírez, Cristian, Castelló, Adrián, Martínez, Héctor, and Quintana-Ortí, Enrique S.

   IEEE Internet of Things Journal 2024

   Bib HTML

   @article{10620227,
     author = {Ramírez, Cristian and Castelló, Adrián and Martínez, Héctor and Quintana-Ortí, Enrique S.},
     journal = {IEEE Internet of Things Journal},
     title = {Communication-Avoiding Fusion of GEMM-Based Convolutions for Deep Learning in the RISC-V GAP8 MCU},
     year = {2024},
     volume = {11},
     number = {21},
     pages = {35640-35653},
     html = {https://ieeexplore.ieee.org/document/10620227},
     keywords = {Convolutional neural networks;Tensors;Transforms;Internet of Things;Signal processing algorithms;Memory management;Matrix decomposition;Convolution;convolutional neural networks (CNNs);cost analysis;deep learning (DL);edge processors;high performance},
     doi = {10.1109/JIOT.2024.3436937},
     preview = {gemm_avoid_paper.png},
     selected = {true},
     bibtex_show = {true}
   }

2. 

   Parallel GEMM-based convolution for deep learning on multicore RISC-V processors: C. Ramı́rez et al.

   Ramírez, Cristian, Castelló, Adrián, Martı́nez, Héctor, and Quintana-Ortı́, Enrique S

   The Journal of Supercomputing 2024

   Bib HTML

   @article{ramirez2024parallel,
     title = {Parallel GEMM-based convolution for deep learning on multicore RISC-V processors: C. Ram{\'\i}rez et al.},
     author = {Ramírez, Cristian and Castell{\'o}, Adri{\'a}n and Mart{\'\i}nez, H{\'e}ctor and Quintana-Ort{\'\i}, Enrique S},
     journal = {The Journal of Supercomputing},
     volume = {80},
     number = {9},
     pages = {12623--12643},
     year = {2024},
     html = {https://link.springer.com/article/10.1007/s11227-024-05927-y},
     preview = {parallel_gemm_paper.png},
     bibtex_show = {true},
     publisher = {Springer}
   }

2022

1. 

   A BLIS-like matrix multiplication for machine learning in the RISC-V ISA-based GAP8 processor: C. Ramı́rez et al.

   Ramírez, Cristian, Castelló, Adrián, and Quintana-Orti, Enrique S

   The Journal of Supercomputing 2022

   Bib HTML

   @article{ramirez2022blis,
     title = {A BLIS-like matrix multiplication for machine learning in the RISC-V ISA-based GAP8 processor: C. Ram{\'\i}rez et al.},
     author = {Ramírez, Cristian and Castell{\'o}, Adri{\'a}n and Quintana-Orti, Enrique S},
     journal = {The Journal of Supercomputing},
     volume = {78},
     number = {16},
     pages = {18051--18060},
     year = {2022},
     html = {https://link.springer.com/article/10.1007/s11227-022-04581-6},
     preview = {gap8_blis.png},
     bibtex_show = {true},
     publisher = {Springer}
   }

2. 

   Performance analysis of convolution algorithms for deep learning on edge processors

   Alonso-Jordá, Pedro, Martı́nez, Héctor, Quintana-Ortı́, Enrique S, and Ramírez, Cristian

   In International Conference on Parallel Processing and Applied Mathematics 2022

   Bib HTML

   @inproceedings{alonso2022performance,
     title = {Performance analysis of convolution algorithms for deep learning on edge processors},
     author = {Alonso-Jord{\'a}, Pedro and Mart{\'\i}nez, H{\'e}ctor and Quintana-Ort{\'\i}, Enrique S and Ramírez, Cristian},
     booktitle = {International Conference on Parallel Processing and Applied Mathematics},
     pages = {236--247},
     year = {2022},
     html = {https://link.springer.com/chapter/10.1007/978-3-031-30445-3_20},
     preview = {convolution_paper.png},
     bibtex_show = {true},
     publisher = {Springer}
   }

3. 

   Performance analysis of matrix multiplication for deep learning on the edge

   Ramírez, Cristian, Castelló, Adrián, Martı́nez, Héctor, and Quintana-Ortı́, Enrique S

   In International Conference on High Performance Computing 2022

   Bib HTML

   @inproceedings{ramirez2022performance,
     title = {Performance analysis of matrix multiplication for deep learning on the edge},
     author = {Ramírez, Cristian and Castell{\'o}, Adri{\'a}n and Mart{\'\i}nez, H{\'e}ctor and Quintana-Ort{\'\i}, Enrique S},
     booktitle = {International Conference on High Performance Computing},
     pages = {65--76},
     year = {2022},
     html = {https://link.springer.com/chapter/10.1007/978-3-031-23220-6_5},
     preview = {gemm_paper.png},
     bibtex_show = {true},
     organization = {Springer}
   }

2021

1. MSc

   

   Sistema embebido para la determinación de la maduración de la carne basado en un sensor de impedancias y procesado neuronal

   Ramı́rez Betancourth, Cristian

   2021

   Bib HTML

   @article{ramirez2021sistema,
     abbr = {MSc},
     title = {Sistema embebido para la determinaci{\'o}n de la maduraci{\'o}n de la carne basado en un sensor de impedancias y procesado neuronal},
     author = {Ram{\'\i}rez Betancourth, Cristian},
     year = {2021},
     url = {https://riunet.upv.es/handle/10251/159394},
     html = {https://riunet.upv.es/handle/10251/159394?show=full},
     preview = {MSC_tesis.png},
     bibtex_show = {true},
     publisher = {Universitat Polit{\`e}cnica de Val{\`e}ncia}
   }

2018

1. Implementation and comparative analysis of fractional order PID Embedded Controllers, applied to speed control of a robotic prosthesis

   Calderon, C. A., Sarango, Roger, Macas, Edwin, Ramírez, Cristian, Rivas-Echeverría, F., and Hernandez, W.

   In 2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA) 2018
2. Automation of a medicinal herb crusher machine applied to the small food industry

   Calderon-Cordova, Carlos, Chuquimarca-Carrillo, Edward, Salinas-Lliviganay, Dayana, Salinas-Bravo, Danner, Rivera-Lituma, Jenny, and Betancourth, Cristian Ramirez

   In 2018 13th Iberian Conference on Information Systems and Technologies (CISTI) 2018
3. PLC-based temperature controller applied to a distiller of essential oils by water-steam drag

   Calderon, C. A., Gutierrez, Juan Pablo, Alvarez, Leonardo, Granda, Daniel, Valarezo, Eduardo, and Ramirez, Cristian

   In 2018 13th Iberian Conference on Information Systems and Technologies (CISTI) 2018
4. Temperature monitoring system for the pasteurization process applied to the small dairy industry

   Calderon-Cordova, Carlos, Criollo, Jairo, Fernandez, Juan, Japon, Diego, Remache, Richard, and Ramirez, Cristian

   In 2018 13th Iberian Conference on Information Systems and Technologies (CISTI) 2018
5. System of monitoring and automation of a rural pumping system, based on WSN and PLC

   Calderon-Cordova, Carlos, Chavez, Miguel, Espinoza, Jorge, Jimenez, Andres, Quito, Jhonatan, Salazar, Luis, and Ramirez, Cristian

   In 2018 13th Iberian Conference on Information Systems and Technologies (CISTI) 2018
6. Smartphone-based monitoring system of a coffee roaster machine, applied to small industry

   Calderon, C. A., Armijos, Andres, Chamba, Carlos, Cueva, Humberto, Ochoa, Fabian, Ortega, Israel, and Ramirez, Cristian

   In 2018 13th Iberian Conference on Information Systems and Technologies (CISTI) 2018
7. Prototype industrial IoT applied to temperature monitoring in storage silos of dairy products

   Calderon-Cordova, Carlos, Gonzaga, Miguel, Morales, Jose, Morocho, Miguel, Torres, Bryan, and Ramirez, Cristian

   In 2018 13th Iberian Conference on Information Systems and Technologies (CISTI) 2018
8. Monitoring and automation of the water pumping and storage process applied to a water treatment plant

   Calderon, C. A., Cueva, Miguel, Cuenca, Nilvar, Honores, Alexis, Guaman, Danny, Jimenez, David, and Ramirez, Cristian

   In 2018 13th Iberian Conference on Information Systems and Technologies (CISTI) 2018
9. Automation prototype applied to the process of packaging water drums of the VillonacoWater Plant

   Calderon-Cordova, Carlos, Calderon, Victor, Maza, Cristian, Rodriguez, Karla, Samaniego, Jorge, and Ramirez, Cristian

   In 2018 13th Iberian Conference on Information Systems and Technologies (CISTI) 2018
10. System of monitoring and automation of temperature of a Turkish bath

    Calderon-Cordova, Carlos, Luis, Granda, Morillo, Juan, Rivera, Anderson, Torres, Carlos, and Ramirez, Cristian

    In 2018 13th Iberian Conference on Information Systems and Technologies (CISTI) 2018
11. Wireless sensor network for real-time monitoring of temperature, humidity and illuminance in an orchid greenhouse

    Calderon-Cordova, Carlos, Bustamante, Bryan, Delgado, Jonathan, Febres, Claudia, Montano, Vinicio, Saritama, Cristian, and Ramirez, Cristian

    In 2018 13th Iberian Conference on Information Systems and Technologies (CISTI) 2018

2017

1. Design and Deployment of Grasp Control System applied to robotic hand prosthesis

   Calderon, Carlos Albero, Ramirez, Cristian, Barros, Veronica, and Punin, Gabriela

   IEEE Latin America Transactions 2017

2016

1. EMG signal patterns recognition based on feedforward Artificial Neural Network applied to robotic prosthesis myoelectric control

   Calderon-Cordova, Carlos, Ramírez, Cristian, Barros, Veronica, Quezada-Sarmiento, Pablo Alejandro, and Barba-Guamán, Luis

   In 2016 Future Technologies Conference (FTC) 2016