Richard Yi Zhang

20102019
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Research Output 2010 2019

2019

Conic Approximation with Provable Guarantee for Traffic Signal Offset Optimization

Ouyang, Y., Zhang, R. Y., Lavaei, J. & Varaiya, P., Jan 18 2019, 2018 IEEE Conference on Decision and Control, CDC 2018. Institute of Electrical and Electronics Engineers Inc., p. 229-236 8 p. 8619739. (Proceedings of the IEEE Conference on Decision and Control; vol. 2018-December).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Semidefinite Program
Traffic Network
Traffic signals
Bounded Treewidth
Quadratic Program

Conic optimization for control, energy systems, and machine learning: Applications and algorithms

Zhang, R. Y., Josz, C. & Sojoudi, S., 2019, In : Annual Reviews in Control. 47, p. 323-340 18 p.

Research output: Contribution to journalReview article

Power control
Learning systems
Distributed parameter control systems
Model predictive control
State estimation

Efficient Algorithm for Large-and-Sparse LMI Feasibility Problems

Zhang, R. Y. & Lavaei, J., Jan 18 2019, 2018 IEEE Conference on Decision and Control, CDC 2018. Institute of Electrical and Electronics Engineers Inc., p. 6868-6875 8 p. 8619019. (Proceedings of the IEEE Conference on Decision and Control; vol. 2018-December).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Linear matrix inequalities
Matrix Inequality
Linear Inequalities
Efficient Algorithms
Data storage equipment

Linear-Time Algorithm for Learning Large-Scale Sparse Graphical Models

Fattahi, S., Zhang, R. Y. & Sojoudi, S., Jan 1 2019, In : IEEE Access. 7, p. 12658-12672 15 p., 8598839.

Research output: Contribution to journalArticle

Open Access
Covariance matrix
Laptop computers
Factorization
MATLAB
Data storage equipment

Monotonicity Between Phase Angles and Power Flow and Its Implications for the Uniqueness of Solutions

Park, S., Zhang, R., Lavaei, J. & Baldick, R., Jan 8 2019. 10 p.

Research output: Contribution to conferencePaper

Open Access
Electric potential
Phase shift
Topology
Local Minima
Isometry
Recovery
Sharp Threshold
Descent Algorithm

Sparse Semidefinite Programs with Near-Linear Time Complexity

Zhang, R. Y. & Lavaei, J., Jan 18 2019, 2018 IEEE Conference on Decision and Control, CDC 2018. Institute of Electrical and Electronics Engineers Inc., p. 1624-1631 8 p. 8619478. (Proceedings of the IEEE Conference on Decision and Control; vol. 2018-December).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Semidefinite Program
Linear Complexity
Time Complexity
Linear Time
Digit

Spurious local minima in power system state estimation

Zhang, R. Y., Lavaei, J. & Baldick, R., Sep 2019, In : IEEE Transactions on Control of Network Systems. 6, 3, p. 1086-1096 11 p., 8728030.

Research output: Contribution to journalArticle

State Estimation
State estimation
Local Minima
Power System
Measurement errors
2018

A theory on the absence of spurious solutions for nonconvex and nonsmooth optimization

Josz, C., Ouyang, Y., Zhang, R. Y., Lavaei, J. & Sojoudi, S., Jan 1 2018, In : Advances in Neural Information Processing Systems. 2018-December, p. 2441-2449 9 p.

Research output: Contribution to journalConference article

Tensors
Decomposition
Chemical analysis

Conic Optimization Theory: Convexification Techniques and Numerical Algorithms

Zhang, R. Y., Josz, C. & Sojoudi, S., Aug 9 2018, 2018 Annual American Control Conference, ACC 2018. Institute of Electrical and Electronics Engineers Inc., p. 798-815 18 p. 8430887. (Proceedings of the American Control Conference; vol. 2018-June).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Distributed parameter control systems
Model predictive control
State estimation
Robust control
Control theory

GMRES-accelerated ADMM for quadratic objectives

Zhang, R. Y. & White, J. K., Jan 1 2018, In : SIAM Journal on Optimization. 28, 4, p. 3025-3056 32 p.

Research output: Contribution to journalArticle

Method of multipliers
Alternating Direction Method
Linear equations
MATLAB
Iteration

How much restricted isometry is needed in nonconvex matrix recovery?

Zhang, R. Y., Sojoudi, S., Josz, C. & Lavaei, J., Jan 1 2018, In : Advances in Neural Information Processing Systems. 2018-December, p. 5586-5597 12 p.

Research output: Contribution to journalConference article

Recovery

Large-scale sparse inverse covariance estimation via thresholding and max-det matrix completion

Zhang, R. Y., Fattahi, S. & Sojoudi, S., Jan 1 2018, 35th International Conference on Machine Learning, ICML 2018. Krause, A. & Dy, J. (eds.). International Machine Learning Society (IMLS), p. 9178-9200 23 p. (35th International Conference on Machine Learning, ICML 2018; vol. 13).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Covariance matrix
Laptop computers
Factorization
MATLAB
Maximum likelihood

Modified interior-point method for large-And-sparse low-rank semidefinite programs

Zhang, R. Y. & Lavaei, J., Jan 18 2018, 2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017. Institute of Electrical and Electronics Engineers Inc., p. 5640-5647 8 p. (2017 IEEE 56th Annual Conference on Decision and Control, CDC 2017; vol. 2018-January).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Semidefinite Program
Interior Point Method
Hessian matrix
Approximation theory
Graph theory

Sparse Inverse Covariance Estimation for Chordal Structures

Fattahi, S., Zhang, R. Y. & Sojoudi, S., Nov 27 2018, 2018 European Control Conference, ECC 2018. Institute of Electrical and Electronics Engineers Inc., p. 837-844 8 p. 8550107. (2018 European Control Conference, ECC 2018).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Covariance Estimation
Lasso
Covariance matrix
Sample Covariance Matrix
Thresholding

Spurious Critical Points in Power System State Estimation

Zhang, R. Y., Lavaei, J. & Baldick, R., Jan 3 2018. 10 p.

Research output: Contribution to conferencePaper

Open Access
State estimation
Measurement errors
Recovery
Electric potential
2017

Robust stability analysis for large-scale power systems

Zhang, R. Y., 2017, 154 p. Massachusetts Institute of Technology.

Research output: Other contribution

Electric power systems
Iterative methods
Innovation
Robust stability
Costs
2016

Certifying microgrid stability under large-signal intermittency

Zhang, R. Y., Elizondo, J., Kirtley, J. L. & White, J. K., Aug 30 2016, 2016 IEEE 17th Workshop on Control and Modeling for Power Electronics, COMPEL 2016. Institute of Electrical and Electronics Engineers Inc., 7556707. (2016 IEEE 17th Workshop on Control and Modeling for Power Electronics, COMPEL 2016).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Microgrid
Intermittency
Stability Margin
Robust control
Unstable

Inertial and frequency response of microgrids with induction motors

Elizondo, J., Zhang, R. Y., Huang, P. H., White, J. K. & Kirtley, J. L., Aug 30 2016, 2016 IEEE 17th Workshop on Control and Modeling for Power Electronics, COMPEL 2016. Institute of Electrical and Electronics Engineers Inc., 7556722. (2016 IEEE 17th Workshop on Control and Modeling for Power Electronics, COMPEL 2016).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Microgrid
Induction Motor
Frequency Response
Kinetic energy
Induction motors

Small-signal stability verification issues for transmission systems with distributed renewables

Zhang, R. Y., Elizondo, J., Kirtley, J. L. & White, J. K., Nov 10 2016, 2016 IEEE Power and Energy Society General Meeting, PESGM 2016. IEEE Computer Society, 7741724. (IEEE Power and Energy Society General Meeting; vol. 2016-November).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Sampling
Uncertainty
2015

An energy-based method for the assessment of battery and battery-ultracapacitor energy storage systems in pulse-load applications

He, Y., Zhang, R. Y. & Kassakian, J. G., May 8 2015, p. 2412-2419. 8 p.

Research output: Contribution to conferencePaper

Energy storage
Phosphates
Lithium
Capacitors
Experiments

Design of resonance damping via control synthesis

Zhang, R. Y., Avestruz, A. T., White, J. K. & Leeb, S. B., Sep 1 2015, 2015 IEEE 16th Workshop on Control and Modeling for Power Electronics, COMPEL 2015. Institute of Electrical and Electronics Engineers Inc., 7236464. (2015 IEEE 16th Workshop on Control and Modeling for Power Electronics, COMPEL 2015).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Damper
Constrained optimization
Damping
Synthesis
Constrained Optimization

Robust small signal stability for microgrids under uncertainty

Elizondo, J., Zhang, R. Y., White, J. K. & Kirtley, J. L., Aug 25 2015, 2015 IEEE 6th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2015. Institute of Electrical and Electronics Engineers Inc., 7223059. (2015 IEEE 6th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2015).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Systems analysis
Robust control
Damping
Uncertainty

Toeplitz-Plus-Hankel Matrix Recovery for Green's Function Computations on General Substrates

Zhang, R. Y. & White, J. K., Nov 1 2015, In : Proceedings of the IEEE. 103, 11, p. 1970-1984 15 p., 7287712.

Research output: Contribution to journalArticle

Green's function
Recovery
Substrates
Costs
Sampling
2014

Analytical model for effects of twisting on litz-wire losses

Sullivan, C. R. & Zhang, R. Y., Jan 1 2014, 2014 IEEE 15th Workshop on Control and Modeling for Power Electronics, COMPEL 2014. IEEE Computer Society, 6877187. (2014 IEEE 15th Workshop on Control and Modeling for Power Electronics, COMPEL 2014).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Analytical Model
Analytical models
Wire
Model
Proximity Effect

Fast simulation of complicated 3-D structures above lossy magnetic media

Zhang, R. Y., White, J. K. & Kassakian, J. G., Oct 1 2014, In : IEEE Transactions on Magnetics. 50, 10, 2323933.

Research output: Contribution to journalArticle

Wire
Linear algebra
Green's function
Fast Fourier transforms
Numerical methods

Realistic litz wire characterization using fast numerical simulations

Zhang, R. Y., White, J. K., Kassakian, J. G. & Sullivan, C. R., Jan 1 2014, APEC 2014 - 29th Annual IEEE Applied Power Electronics Conference and Exposition. Institute of Electrical and Electronics Engineers Inc., p. 738-745 8 p. 6803390. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wire
Computer simulation
Numerical methods
Magnetic fields
Copper

Simplified design method for Litz wire

Sullivan, C. R. & Zhang, R. Y., Jan 1 2014, APEC 2014 - 29th Annual IEEE Applied Power Electronics Conference and Exposition. Institute of Electrical and Electronics Engineers Inc., p. 2667-2674 8 p. 6803681. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Skin
Wire
2012

A generalized approach to planar induction heating magnetics

Zhang, R. Y., 2012, 90 p. Massachusetts Institute of Technology.

Research output: Other contribution

Induction heating
Maxwell equations
Multiobjective optimization
Green's function
Electromagnetic fields
2011

Integration of Variable Energy Resources

Zhang, R. Y., Heidel, T. D. & Farid, A. M., 2011, The Future of the Electric Grid: An Interdisciplinary MIT Study. Kassakian, J. G. & Schmalensee, R. (eds.). Cambridge, MA: MIT Energy Initiative, p. 53-76

Research output: Chapter in Book/Report/Conference proceedingChapter

2010

A go-cart as an electric vehicle for undergraduate teaching and assessment

Heffernan, B., Duke, R., Zhang, R., Gaynor, P. & Cusdin, M., Dec 1 2010, AUPEC 2010 - 20th Australasian Universities Power Engineering Conference: "Power Quality for the 21st Century". 5710743. (AUPEC 2010 - 20th Australasian Universities Power Engineering Conference: "Power Quality for the 21st Century").

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Electric vehicles
Teaching
Students
Power electronics
Inspection