Experience
Dec 2020 - Present
Software Developer
Interwest Consulting Group
- Developing web-based software according to clients needs. Sharepoint, C#.net, Javascript and etc.
- Systems programming, TCP/IP, HTTP/HTTPS
Jun 2018 - Present
Research Specialist
School of Informatics, Computing, and Cyber Systems Northern Arizona
University
- predictive modeling of cardiovascular disease
- Used wavelet decomposition and other signal processing method to extract features from ECG signal, and designed an patientadaptable multi-stage unsupervised learning algorithm. the method is capable to improve predicting accuracy up to 10%.
- Simulation of biochemical reactions:
- Adding new features to BioNetGen in Perl, NFsim in C++ (tools for high computational biochemical simulation).
- Real time optimizing in a dynamic system.
- Online machine learning: proposing a optimal control method by implementing a feedback system in a communication channel
- Accent adjustment system using deep learning:
- Deep learning for speech recognition implemented using Tensorflow, keras and Python (scikit-learn).
- Natural language processing (NLP) using Python (NLTK)
July 2017 - May 2018
Research Assisstant
School of Informatics, Computing, and Cyber Systems Northern Arizona
University
- User authentication based on physical pattern Developing Matlab program for corresponding image processing tasks.
- Developing a graph matching algorithm with higher accuracy rate
- All programs were implemented in High performance computing environment (AWS)
- Implementation of face recognition and object recognition for a robot
- The software was based on OpenCV and implemented in C++
- Implemented using SIFT and SURF algorithm and HAAR classifier
- Designing a self optimizing inertial measurement unit
- Signal processing(Noise filtering, Kalman filter)
Jan 2016 - Jun 2017
Teacher Assisstant
School of Informatics, Computing, and Cyber Systems Northern Arizona
University
- Pattern Recognition and MachineLearning
- Automatic control Lab
- FPGA Lab
- Digital logic Lab
- Telecommunication systems.
- Project design
- Electrical engineering
- Electrical engineering Lab
Jan 2016 - Jun 2017
Education
Northern Arizona University
Master of Science
ELECTRICAL ENGINEERING
Courses:
Pattern Recognition and Machine Learning, Image processing and Computer vision, Advanced Statistical analyzing and Stochastic and Random Process Analyzing-
Thesis:
Maximizing energy efficiency of cognitive radio sensor networks with different Levels of channel availability awareness In this thesis by mathematically modeling a cognitive system, an optimum solution for maximization of energy efficiency and reducing end-to-end latency is suggested. In addition, a practical learning algorithm for optimizing a dynamic system with no prior knowledge of characteristic using online machine learning is proposed
Jan 2016 - Jun 2017
Azad University of Tehran
Bachelor of Science
ELECTRICAL ENGINEERING
Thesis:
Brain Computer Interface – Control Robotic arm using brainwave. This project involved capturing brain waves (EEG), denoiseing, detecting corresponding waves to brain attention and focus and controlling a robotic arm using level of attention and focus
Sep 2010 - April 2015
Academic Projects
- Kaggle-Yelp Challenge: NLP
- Implementing a communication system predictor using online and reinforcement machine learning methods.(2017)
- Quick data retrieving algorithm for a large genomic data (70GB) (2017)
- Web crawling tools for optimizing search engine such as Google implemented in PHP (2016)
- Controlling mouse cursor using eye tracking in C# using EmguCV library by tracking eye color and pattern. (2010)
- 3D robot soccer simulation in C# as a part of national RoboCup competition. (2010)
Skills
-
knowledge
Stochastic optimization, Statistics, Machine learning (random forest, boosting tree, Support Vector Machine, K Nearest Neighbor, etc. ), Graph analysis, Dynamic control, Computer vision(convolutional neural network, Object detection, Face recognition),. -
Programming
Matlab,C ++,Python,PHP -
Databases
MySQL, PostgreSQL -
Utilities
GitHub, Keras, Tensorflow, Linux, OpenCV. AWS -
Hardware
AVR, ARM, FPGA, Arduino
Awards & Honors
- Technical Committee member, Advanced International Conference on Telecommunications
- Graduate assistantship award., Northern Arizona University graduate school
Publications
| Title | Cited by | Year |
|---|---|---|
|
Smart Heart Monitoring: Early Prediction of Heart Problems Through Predictive Analysis of ECG Signals
J Chen, A Valehi, A Razi
IEEE Access, 2019
|
2019 | |
|
A Deviation Analysis Framework for ECG Signals Using Controlled Spatial Transformation
J Chen, A Valehi, F Afghah, A Razi
IEEE-EMBS International Conferences on Biomedical and Health Informatics (IEEE BHI), 2018
|
2018 | |
|
Maximizing energy efficiency of cognitive wireless sensor networks with constrained age of information
A Valehi, A Razi
IEEE Transactions on Cognitive Communications and Networking 3 (4), 643 - 654, 2017
|
20 | 2017 |
|
Delay minimization by adaptive framing policy in cognitive sensor networks
A Razi, A Valehi, E Bentley
Wireless Communications and Networking Conference (WCNC), 2017 IEEE, 1-6, 2017
|
3 | 2017 |
|
An Online Learning Method to Maximize Energy Efficiency of Cognitive Sensor Networks
A Valehi, Abolfazl Razi
IEEE Communications Letters, 2017
|
4 | 2017 |
|
Robots in love: Evolutionary psychology, artificial life, and cognitive robotics
KS Oskooyee, MR Kashani, N Aref, M Ghaemi, A Valehi, FJ Moghaddam
Cognitive Informatics & Cognitive Computing (ICCI* CC), 2012 IEEE 11th …, 2012
|
1 | 2012 |
|
A graph matching algorithm for user authentication in data networks using image-based physical unclonable functions
A Valehi, A Razi, B Cambou, W Yu, M Kozicki
Computing Conference, 2017 IEEE, 863 - 870, 2017
|
2 | 2017 |
|
Designing the low noise 2 GHz amplifier for the RF receivers
Mahdi Soufi, Morteza Amini, Muhammad Ali Zomorodian, A Valehi
IOSR Journal of Computer Engineering (IOSR-JCE) 18 (4), 109-112, 2016
|
2016 |
preprint:
- A.Valehi A.Razi “Modeling Biomolecular Interactions” (draft version)
- A.Valehi, A.Razi ”Probabilistic Graph matching approach in data networks ” (draft version)
- A.Valehi, O.Kang “Accent measurement in speech recognition systems using deep neural network” (draft version)