Two-Phase MMC Based on Modular Multilevel Series/Parallel Converter for Back to Back Power Systems

The MMC converter is the key topology for HVDC applications. In these systems, a major complexity is the number of modules and components required per phase to achieve nominal voltage and current levels for applications in transmission system. In this paper, the topology and control of a two-phase MMC system for HVDC applications is presented....

Minimally modified balanced codes

We present and analyze a new construction of bipolar balanced codes where each codeword contains equally many -1's and +1's. The new code is minimally modified as the number of symbol changes made to the source word for translating it into a balanced codeword is as small as possible. The balanced codes feature low redundancy and time...

On Learning Discrete-Time Fractional-Order Dynamical Systems

Discrete-time fractional-order dynamical systems (DT-FODS) have found innumerable applications in the context of modeling spatiotemporal behaviors associated with long-term memory. Applications include neurophysiological signals such as electroencephalogram (EEG) and electrocorticogram (ECoG). Although learning the spatiotemporal parameters of...

Improved Generalization in Semi-Supervised Learning: A Survey of Theoretical Results

Semi-supervised learning is the learning setting in which we have both labeled and unlabeled data at our disposal. This survey covers theoretical results for this setting and maps out the benefits of unlabeled data in classification and regression tasks. Most methods that use unlabeled data rely on certain assumptions about the data...

Efficient Online Globalized Dual Heuristic Programming With an Associated Dual Network

Globalized dual heuristic programming (GDHP) is the most comprehensive adaptive critic design, which employs its critic to minimize the error with respect to both the cost-to-go and its derivatives simultaneously. Its implementation, however, confronts a dilemma of either introducing more computational load by explicitly calculating the...

The Self-Organization of Stuff

The common description of the configuration of stuff in a room, one of order (tidy) and chaos (messy), fails to explain the phenomenon that artifacts create structures around people and activities in a space, with both functional and cognitive properties. This form of organization, that is recognizable on various scale levels, emerges...

Complexity of Scheduling Charging in the Smart Grid: Extended Abstract

The problem of optimally scheduling the charging demand of electric vehicles within the constraints of the electricity infrastructure is called the charge scheduling problem. The models of the charging speed, horizon, and charging demand determine the computational complexity of the charge scheduling problem. For about 20 variants the problem is...

Backup rules in Software-Defined Networks

The past century of telecommunications has shown that failures in networks are prevalent. Failure recovery processes are therefore needed. Failure recovery is mainly influenced by (1) detection of the failure, and (2) circumvention of the detected failure. However, especially in SDNs where controllers recompute network state reactively, this...

Model Predictive Control for continuous piecewise affine systems using optimistic optimization

This paper considers model predictive control for continuous piecewise affine (PWA) systems. In general, this leads to a nonlinear, nonconvex optimization problem. We introduce an approach based on optimistic optimization to solve the resulting optimization problem. Optimistic optimization is based on recursive partitioning of the feasible set...

The inevitable and continuing growth of regulations for planning and building

This paper aims at answering the question: How can we explain the evidently unstoppable growth of regulations for planning and building? The answer to this question is of relevance, since we have been (and still are) confronted with the negative consequences of an overly complex and comprehensive legal framework for planning and building. This...

A spatiotemporal perspective on empowerment in projects

The complex and dynamic nature of project environments presents both opportunities and challenges for the empowerment of individuals and teams. Yet, empowerment is a complex concept in its own right, taking on multiple forms across people, is contextually embedded and shifts over time. As research on empowerment in projects continues to grow,...

The inevitable and continuing growth of regulations for planning and building

This paper aims at answering the question: How can we explain the evidently unstoppable growth of regulations for planning and building? The answer to this question is of relevance, since we have been (and still are) confronted with the negative consequences of an overly complex and comprehensive legal framework for planning and building. This...

Emerging Neighbourhoods: Or why piece-by-piece urbanism leads to flexible and diverse city development

The development of flexible neighbourhoods, by using research from complexity theory and analysis of historical neighbourhoods.

Interior Point Methods for Semidefinite Programming