LIDS & Stats Tea

Tea talks are 20 minute long informal chalk-talks for the purpose of sharing ideas and making others aware about some of the topics that may be of interest to the LIDS and Stats audience. If you are interested in presenting in the upcoming seminars, please email lids_stats_tea[at]mit[dot]edu

September 12, 2018

Long Ties Accelerate Realistic Complex Contagions

Amin Rahimian (IDSS)

The spread of behaviors (i.e. social contagion) depends on the structure of the network of contacts between people. Interventions that change network structure can thus substantially affect how new ideas, products, and conventions are adopted. For...

September 19, 2018

Automated As-Is Modelling of Industrial Facilities

Eva Agapaki (University of Cambridge)

The cost of modelling existing industrial facilities is currently considered to counteract the benefits of the models in maintaining and retrofitting a facility. 90% of the modelling cost is typically spent on labour for converting point cloud data...

September 26, 2018

Microgrids for Resilient Electricity Distribution Networks

Devendra Shelar (MIT Civil and Environmental Engineering)

We propose a new approach for utilizing distributed energy resources (DERs) and microgrids for improving the resilience of electricity distribution networks to correlated cyber-physical failures. Such failures can result from random faults (e.g,...

October 3, 2018

Direct Runge Kutta Discretization Achieves Acceleration

Jingzhao Zhang (LIDS)

We study gradient-based optimization methods obtained by directly discretizing a second-order ordinary differential equation (ODE) related to the continuous limit of Nesterov's accelerated gradient method. When the function is smooth enough, we show...

October 10, 2018

Probability Distributions on Posets: An Application to Security Games

Mathieu Dahan (MIT Center for Computational Engineering)

We study an abstract problem regarding probability distributions on posets. The problem is to resolve the existence of a probability distribution over subsets of a poset, such that a set of constraints involving marginal probabilities of the...

October 17, 2018

Convex Restriction: A Sufficient Convex Condition for Solvability and Feasibility of Nonlinear Equations

Dongchan Lee (Mechanical Engineering)

Convex restriction identifies the convex subset of a general nonconvex feasible set described by nonlinear equality and inequality constraints. Nonlinear optimization problems often rely on convex relaxations, which can be interpreted as convex...

October 24, 2018

LIDS & Stats Tea Talk - Xinbo Geng

Xinbo Geng (Texas A&M University)

October 31, 2018

Dynamic Pricing under a Static Calendar

Jinglong Zhao (IDSS)

Our work is based on the classical dynamic pricing problem. From our collaborations with a large Consumer Packaged Goods company, we have found that while they appreciate the advantages of dynamic pricing, it is operationally beneficial for them to...

November 7, 2018

LIDS & Stats Tea Talk - Tong Huang

Tong Huang (Texas A&M University)

November 14, 2018

High-Dimensional Precision Matrix Estimation Under Total Positivity

Yuhao Wang (LIDS & EECS)

We consider the problem of estimating high-dimensional precision matrices for multivariate totally positive of order two (MTP2) distributions. Such distribution is of interest in financial econometrics, where the distribution of stock price daily...

November 20, 2018

LIDS & Stats Tea Talk - Julia Gaudio

Julia Gaudio (LIDS & IDSS)

November 28, 2018

LIDS & Stats Tea Talk - Martín Zubeldía

Martín Zubeldía (LIDS)

December 5, 2018

LIDS & Stats Tea Talk - Tuhin Sarkar

Tuhin Sarkar (LIDS & IDSS)

December 12, 2018

LIDS & Stats Tea Talk - Xu Bolun

Xu Bolun (MIT Energy Initiative)