About me,

I am currently a graduate student at University of Illinois at Urbana-Champaign, department of Electrical and Computer Engineering. My research advisors are Prof. Minh N. Do and Prof. Zhizhen Zhao and I am working in the Computational Imaging Group (CIG). I am interested in signal processing, optimization, machine learning and their applications in medical research. I received my M.Sc. from Sharif University of Technology and my B.Sc. from University of Tehran both in Electrical Engineering.

Current and past projects

- 3D refinement in Cryo Electron Microscopy (Cryo-EM)
(May-Aug 2018, Biomedical Imaging Group (BIG), Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland)
Advisor: Prof. Michael Unser, Dr. Emmanuel Soubies, Laurene Donati

Developing a variational framework for 3D refinement of the ab initio density map and the underlying latent variables in a Cryo-EM setup.

- Point source localization from projection lines via rotation invariant features
(March 2018-present, University of Illinois at Urbana-Champaign)
Advisor: Prof. Ivan Dokmanic, Prof. Zhizhen Zhao, Dr. Shuai Huang

Developing parametric techniques to recover a point source model from a set of projection data. Applying methods inspired by harmonic retrieval and unassigned distance geometry to extract the geometry information of the model from rotation invariant features.

- Protein folding prediction and single particle reconstruction in Cryo-EM
(January 2017-present, University of Illinois at Urbana-Champaign)
Advisor: Prof. Zhizhen Zhao, Prof. Minh N. Do

Developing techniques to reconstruct density maps and atmoic structure of biological particles from their 2D projection images. Prediction of the residue contact map from protein amino-acid sequence using machine learning based methods.

- Multi-segment reconstruction and multi-reference alignment using invariant features
(August 2017-present, University of Illinois at Urbana-Champaign)
Advisor: Prof. Zhizhen Zhao, Prof. Minh N. Do

Estimating an unknown signal from a set of shift-invariant features. Using non-convex optimization tools and spectral methods to solve the estimation problem.

- Physical layer caching and Coordinated Multi-point transmission (CoMP) in cellular networks
(Sept-Dec 2015, Research Internship, Hong Kong University of Science and Technology)
Advisor: Prof. Vincent Lau, Prof. An Liu

Analyzing rate outage probability in random cache-enabled cellular networks in CoMP scenarios owing mathematical tools from stochastic geometry and optimization.

- Cellular load balancing via relay nodes at the cell edges
(Jul-Sept 2015, Research Internship, Chinese University of Hong Kong)
Advisor: Prof. Minghua Chen

Traffic scheduling based on the deadlines and the volumes regarding each traffic in offline scenarios in addition to the corresponding mathematical optimization modeling.

- Improvement of Content Distribution Algorithms in Opportunistic Networks, Resource allocation of Device to Device communications underlying cellular
(2014-2015, M.Sc. projects, Sharif University of Technology)
Advisor: Prof. Mohammad Reza Pakravan

Designing feature-based content dissemination algorithms in Opportunistic networks, mathematical analysis of the dissemination rate. Designing heuristic orthogonal, non-orthogonal and semi-orthogonal resource allocation schemes for D2D communications, mathematical modeling of the problem.

Publications

  • H. Chen, M. Zehni, Z. Zhao, "A Spectral Method for Stable Bispectrum Inversion with Application to Multireference Alignment", IEEE Signal Processing Letter, 2018.

  • M. Zehni, M. Do, Z. Zhao, "Multi-Segment Reconstruction Using Invariant Features ", The IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), April 2018, Calgary, Canada.

  • M. Zehni, G. Elhami and M. R. Pakravan, "Feature-based content dissemination process in opportunistic networks," in IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), Hong Kong, 2015.

  • G. Elhami, M. Zehni and M. R. Pakravan, "Maximum clique-based resource allocation in device-to-device communications," in IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC) , Hong Kong, 2015.

  • M. Zehni and V. Shah-Mansouri, "Probability analysis of reliable second order routing in wireless field networks," in 23rd Iranian Conference on Electrical Engineering, Tehran, 2015.

  • G. Elhami, M. Zehni and M. R. Pakravan, "A survey on heterogeneous access networks: Mobile data offloading," in 23rd Iranian Conference on Electrical Engineering, Tehran, 2015.

Contact

111 Coordinated Science Labratory University of Illinois at Urbana-Champaign
mzehni2 AT illinois DOT edu