Chang LIU
My pdf CV can also be found here (pdf).
Summary
PhD candidate in Electrical Engineering at Northwestern University with concentration on network economics, game theory and optimization. Passionate about quantitive analytics, statistical modeling and data science.
Related Coursework
Data Science: Machine Learning, Getting and Cleaning Data, Exploratory Data Analysis, R Programming, Statistical Interference, Exploratory Analysis, Reproducible Research, Regression Models
Math: Linear Algebra, Real Analysis, Game Theory, Convex Optimization, Stochastic Models, Algorithms.
Telecommunications: Digital Communications, Wireless and Mobile Networks, DSP, Communication Networks, Information Theory, Control Theory.
Education
Sep 2012 – Present Electrical Engineering, PhD Student and Research Assistant,
Northwestern University, Evanston, USA
Sep 2010 - Dec 2011 Electrical Engineering, Master of Science, GPA: 4.0/4.0 with all courses “A” or “A+”
Columbia University, New York City, USA
Sep 2006 - Jun 2010 Electrical Engineering, Business Administration, Bachelor, Double degree, GPA: 3.8/4.0
Zhejiang University (ZJU), Hang Zhou, China
Sep 2008 - May 2009 Exchange Study, GPA: 11/12
The Hong Kong University of Science and Technology (HKUST), Hong Kong
Professional Experience
Sep 2015 - Dec 2015
Optimization intern, Conversant, Chicago, USA
Project: A CPM Model for Minimizing Ad-Auctions Cost
June 2015 - Sep 2015
Internship, Cisco, San Jose, CA, USA
Project: Location Analytic
May 2011 - Aug 2011
Research Internship, Bell Labs, Stuttgart, Germany
Project: Predicting number of mobile subscribers
Feb 2012 - Sep 2012
Product Manager, SenseNet, Changchun, China
Project: Developing wireless sensor network in smart agriculture
Academic Experience
Jun 2013 - present
Research Assistant, Northwestern University Evanston, USA
Project: Network Economics in Wireless Communication Networks
Jan 2015 - Feb 2015
Teaching Assistant, Northwestern University, Evanston, USA
Class: Programming for Data Analytics
Jan 2011 - May 2011
Course Project, Information theory, Columbia University
Project: Pairs trading with correlation and mutual information
Jan 2011 - May 2011
Course Project, Applied network technology, Columbia University
Project: Safety verification in a lane merge system
Sep 2010 - Dec 2010
Course Project, Ad hoc network, Columbia University
Project: Improved cluster routing in wireless sensor networks
Sep 2010 - Dec 2010
Course Project, Wireless sensing, Columbia University
Project: RFID data filtering in supply chain
Aug 2009 - May 2010
Research Assistant, System control, Zhejiang University
Project: Network programming for Zhejiang University distance education
Jun 2009 – Nov 2009
Bachelor Double Degree Thesis, Business administration, Zhejiang University
Project: Technology-based business model of technological entrepreneurship
Publications
Awards and Honors
Invited Talks
Training and Certifications
Extracurricular Activities
My pdf CV can also be found here (pdf).
Summary
PhD candidate in Electrical Engineering at Northwestern University with concentration on network economics, game theory and optimization. Passionate about quantitive analytics, statistical modeling and data science.
Related Coursework
Data Science: Machine Learning, Getting and Cleaning Data, Exploratory Data Analysis, R Programming, Statistical Interference, Exploratory Analysis, Reproducible Research, Regression Models
Math: Linear Algebra, Real Analysis, Game Theory, Convex Optimization, Stochastic Models, Algorithms.
Telecommunications: Digital Communications, Wireless and Mobile Networks, DSP, Communication Networks, Information Theory, Control Theory.
Education
Sep 2012 – Present Electrical Engineering, PhD Student and Research Assistant,
Northwestern University, Evanston, USA
Sep 2010 - Dec 2011 Electrical Engineering, Master of Science, GPA: 4.0/4.0 with all courses “A” or “A+”
Columbia University, New York City, USA
Sep 2006 - Jun 2010 Electrical Engineering, Business Administration, Bachelor, Double degree, GPA: 3.8/4.0
Zhejiang University (ZJU), Hang Zhou, China
Sep 2008 - May 2009 Exchange Study, GPA: 11/12
The Hong Kong University of Science and Technology (HKUST), Hong Kong
Professional Experience
Sep 2015 - Dec 2015
Optimization intern, Conversant, Chicago, USA
Project: A CPM Model for Minimizing Ad-Auctions Cost
- Develop optimal bidding strategies for CPM campaigns in Real Time Bidding System to maximize ad-auctions revenue.
- Simulate the proposed scheme with real campaign data and various target impressions/conversions with R/Python/SQL.
- The proposed algorithm can dcecrease the total cost by more than 60% and now being further developed in production line
June 2015 - Sep 2015
Internship, Cisco, San Jose, CA, USA
Project: Location Analytic
- Estimated the clients’ indoor location using signal strengths for LTE and WiFi networks with Bayesian estimation and prediction methods including ML, MMSE, MAP and filtering.
- Designed the clients’ mobility tracking algorithm with Markov Decision Process (MDP) and recursive bayesian filtering.
- Improved the location accuracy by 30% with LTE RSRP simulation and 70% by filtering
- Submitted two patents to Cisco Systems based on location analytics.
May 2011 - Aug 2011
Research Internship, Bell Labs, Stuttgart, Germany
Project: Predicting number of mobile subscribers
- Designed an econometric estimation system to predict trends on the telecommunication market.
- Submitted two papers on the effect of social and economic factors behind the trends.
- The estimation system is now used by Alcatel-Lucent’s Service and Marketing unit.
Feb 2012 - Sep 2012
Product Manager, SenseNet, Changchun, China
Project: Developing wireless sensor network in smart agriculture
- Designed a practical WSN system to realize smart agriculture.
- Led a group of 14 people to implement it in experimental field around Changchun, China.
- This project is funded by Chinese government and has been invited to National High-Tech Agriculture Exhibition.
Academic Experience
Jun 2013 - present
Research Assistant, Northwestern University Evanston, USA
Project: Network Economics in Wireless Communication Networks
- Modeled congestion and pricing games in wireless communication system to analyze welfares under varied social regulations (e.g., shared and unlicensed spectrum).
- Developed a spectrum sharing scheme and compared social welfare and consumer surplus by solving concave games.
- Applied game theory (e.g., Kakutani theorem) and convex optimization theory to prove the existence of Nash Equilibrium.
Jan 2015 - Feb 2015
Teaching Assistant, Northwestern University, Evanston, USA
Class: Programming for Data Analytics
- Provided instructions and assistance during pair programming sessions during the class for MBA students.
- Implemented test suits with Python unittest framework to auto-test students' assignments.
Jan 2011 - May 2011
Course Project, Information theory, Columbia University
Project: Pairs trading with correlation and mutual information
- Proposed a trading methodology on stock pairs formation and trading operations.
- Tested with a standard data set showed more than 100% profit gain for the developed algorithm.
Jan 2011 - May 2011
Course Project, Applied network technology, Columbia University
Project: Safety verification in a lane merge system
- Designed a car-to-car communication protocol to avoid vehicular collisions.
- Formally verified this protocol using probabilistic approaches (e.g., the Zigangorov-Jelinek algorithm).
Sep 2010 - Dec 2010
Course Project, Ad hoc network, Columbia University
Project: Improved cluster routing in wireless sensor networks
- Established a cluster header selection based routing algorithms
- Reached eight times higher lifetime than the standard approach (LEACH routing).
Sep 2010 - Dec 2010
Course Project, Wireless sensing, Columbia University
Project: RFID data filtering in supply chain
- Developed a Hidden Markov Chain model and applied the Viterbi algorithm to reduce false readings of RFID tags.
Aug 2009 - May 2010
Research Assistant, System control, Zhejiang University
Project: Network programming for Zhejiang University distance education
- Implemented a TCP-based program for online learning and experiments.
- This software is now used by ZJU’s online education program.
Jun 2009 – Nov 2009
Bachelor Double Degree Thesis, Business administration, Zhejiang University
Project: Technology-based business model of technological entrepreneurship
- Built a model of evaluating technological entrepreneurship factors to consult managers.
- Compared independent innovation with cooperation and buying licenses.
Publications
- (Best Paper Award) C. Liu, R. A. Berry, “The Impact of Investment Timing and Uncertainty on Competition in Unlicensed Spectrum”, in 14th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (WiOpt16), May 2016.
- C. Liu, R. A. Berry, “Tiered Spectrum Sharing and Price Competition”, in IEEE INFOCOM Workshop on Smart Data Pricing, Apr. 2016.
- C. Liu, R. A. Berry, “Investment and Competition with Shared Spectrum”, in Asilomar Conference on Signals, Systems and Computers, Nov. 2015.
- C. Liu, E. Wei, R. A. Berry, "Investment and Competition in Open Networks", in it The 10th Workshop on the Economics of Networks, Systems and Computation, 2015.
- (Best Paper Award) C. Liu, R. A. Berry, "Investing and Price Competition for Multiple Bands of Unlicensed Spectrum", in IEEE Workshop on Smart Data Pricing, 2015
- C. Liu, R. A. Berry, "A Priority Queue Model for Competition with Shared Spectrum", in the 52nd Annual Allerton Conference on Communication, Control, and Computing, Oct. 2014.
- C. Liu, R. A. Berry, "Competition with Licensed Shared Spectrum'', (invited paper) in Proceedings of 48th Annual Conference on Information Sciences and Systems (CISS 2014), Mar. 2014.
- C. Liu, R. A. Berry, "Competition with Open Spectrum Access: Sharing vs. Unlicensed Access", in Crowncom special issues on Wifi, Jun 2014.
- C. Liu, R. A. Berry, "Competition with Shared Spectrum", in IEEE Dynamic Spectrum Access Networks (DySPAN), Apr. 2014.
- C. Liu, S. Valentin, M. Tangemann, “Predicting the Number of Mobile Subscribers: An Accurate Forecasting System and its Application”, in Proc. of the IEEE Wireless Commun. and Netw. Conf. (WCNC), Apr. 2012. Accepted for publication. (PDF)
- S. Valentin, C. Liu, and M. Tangemann, “Forecasting Telecommunication Demand: Methods For the Crystal Ball”, in Proc. of the 2nd Bell Labs Workshop on Science and Fundamentals, Dec. 2011.
Awards and Honors
- "Best Paper Award" in WiOpt Conference, 2016
- "Best Paper Award" in IEEE Infocom Workshop on Smart Data Pricing, 2015
- Management Certificate for Scientists and Engineers, 2016
- Terminal Year Fellowship at Northwestern University, 2016
- Fellowship in Leadership at Northwestern University, 2014-2015
- Google North America Conference Travel Grant, 2014
- IEEE Student Travel Grants funded by NSF, 2014
- Walter P. Murphy Fellowship at Northwestern University, 2012-2013
- Mong Man Wai China-Hong Kong Exchange Student Scholarship, 2 out of 20000 applicants
- Dean’s List Award at Hong Kong University of Science and Technology, GPA 11/12
- First Prize of Futong Academic Scholarship
- First Prize of Academic Scholarship of ZJU
Invited Talks
- "Conduct Cutting Edge Interdisciplinary Research in Technology and Business", in The Annual Conference for Women Engineers (WE14) and International Conference of Women Engineers and Scientists (ICWES16), Oct. 2014.
Training and Certifications
- Specialization Certificate in Data Science authorized by Johns Hopkins University
- Specialization Certificate in Big Data authorized by UCSD (in progress)
- Licensed ZUMBA Instructor (licensed to teach ZUMBA dance and fitness classes)
- Certified Adult First Aid/CPR/AED from American Red Cross
- Certified member of National Bartender Association
Extracurricular Activities
- President of Graduate Women Across Northwestern (GWAN), 2014-2015
- President of Electrical Engineering and Computer Science Students Union, 2014
- EECS representative in Graduate Leadership Advocacy Council (GLAC), 2013-2015
- Volunteer in McCormick Graduate Leadership Council (MGLC), 2013
- Volunteer in Evanston Community
- Sidekick in International Office at Northwestern University