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This paper focuses on the identification of nonlinear hybrid systems involving unknown nonlinear dynamics. The proposed method extends the framework of by introducing nonparametric models based on kernel functions in order to estimate arbitrary nonlinearities without prior knowledge. In comparison to the previous work of, which also dealt with unknown nonlinearities, the new algorithm assumes the...
This paper presents a study for using Kriging metamodeling in combination with Covariance Matrix Adaptation Evolution Strategies (CMA-ES) to find robust solutions. A general, archive based, framework is proposed for integrating Kriging within CMA-ES, including a method to utilize the covariance matrix of the CMA-ES in a straightforward way to improve the accuracy of the Kriging predictions without...
As a way to reduce the energy consumed by a building's HVAC system, a practical method for optimal control has been developed. Since proposed method identifies objective function model for optimization with past operational data, it automatically adjusts the settings in accordance with the change in the outside environment and building operation. The proposed method was applied to an actual hotel...
We propose a nonsmooth bilevel programming method for training linear learning models with hyperparameters optimized via T-fold cross-validation (CV). This algorithm scales well in the sample size. The method handles loss functions with embedded maxima such as in support vector machines. Current practice constructs models over a predefined grid of hyperparameter combinations and selects the best one,...
There is a growing realization that uncertain information is a first-class citizen in modern database management. As such, we need techniques to correctly and efficiently process uncertain data in database systems. In particular, data reduction techniques that can produce concise, accurate synopses of large probabilistic relations are crucial. Similar to their deterministic relation counterparts,...
Top-k monitoring is a noteworthy query that recently has been put into practice in wireless sensor networks (WSN). In top-k monitoring (i.e., an instance of continuous distributed monitoring), base station or coordinator continuously monitors k sensors with the highest (or lowest) values. Since the goal in such applications is to perform monitoring task while incurring minimum communication (data...
Current mode (CM) scheme provides suitable alternative for the high speed on-chip interconnect signaling. This paper presents a energy-delay optimization methodology for the current-mode (CM) signaling scheme. Optimization for the CM circuits for on-chip interconnects requires a joint optimization of driver and receiver device sizes, as their parameters which affect the energy-delay performance depend...
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