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Wrocławskie Centrum
Sieciowo-Superkomputerowe

Publikacje

Data-driven approach enabling post-operation evaluation of air conditioning performance regarding thermal conditions attained indoors

Monika Maciejewska, Andrzej Szczurek, Mariusz Uchroński, Maciej Olejnik

Data-driven approaches become more and more attractive in building performance analysis including performance assessment of heat, ventilation, and air conditioning (HVAC) systems. Their popularity is associated with the increasing availability of large amounts of high-quality building-related measurement data. The study is focused on a data-driven approach that enables post-operation evaluation of AC performance based on indoor air monitoring. It allows for the identification of the classifying solution which recognizes the monitoring data that is representative of thermal conditions during AC operation.

Quantum annealing-driven branch and bound for the single machine total weighted number of tardy jobs scheduling problem

Wojciech Bożejko, Jarosław Pempera, Mariusz Uchroński, Mieczysław Wodecki

In the paper author presents a new approach to solving NP-hard problems of discrete optimization adapted to the architecture of quantum processors (QPU, Quantum Processor Unit) implementing hardware quantum annealing. This approach is based on the use of the quantum annealing metaheuristic in the exact branch and bound algorithm to compute the lower and upper bounds of the objective function. To determine the lower bound, a new method of defining the Lagrange function for the dual problem (the generalized discrete knapsack problem) was used, the value of which is calculated on the QPU of a quantum machine. In turn, to determine the upper bound, we formulate an appropriate task in the form of binary quadratic programming with constraints.

Plakat: Determination of the Lower Bounds of the Goal Function for a Single-Machine Scheduling Problem on D-Wave Quantum Annealer

Wojciech Bożejko, Jarosław Pempera, Mariusz Uchroński, Mieczysław Wodecki

Plakat przedstawiony na konferencji: International Conference on Computational Science, która odbyła się w dniach 3-5 lipca 2023 roku w Pradze.

Determination of the Lower Bounds of the Goal Function for a Single-Machine Scheduling Problem on D-Wave Quantum Annealer

Wojciech Bożejko, Jarosław Pempera, Mariusz Uchroński, Mieczysław Wodecki

In this paper authors propose a methodology for generating good lower bounds on the optimal value of the objective function using a quantum machine.

An Exact Quantum Annealing-Driven Branch and Bound Algorithm for Maximizing the Total Weighted Number of on-Time Jobs on a Single Machine

Wojciech Bożejko, Jarosław Pempera, Mariusz Uchroński, Mieczysław Wodecki

In the publication authors present a new approach to solving NP-hard discrete optimization problems using D-Wave’s QPU quantum processor architecture implementing quantum annealing.

Raporty

Raport roczny PRACE

Fabio Affinito, Evangelia Athanasaki, Sanzio Bassini, et. al.

W raporcie PRACE 2019 znalazły się informacje na temat rozwoju inicjatyw lokalnych w ramach przedsięwzięcia EuroHPC Joint Undertaking, na którym opiera się działalność PRACE. Dokument przedstawia również wyzwania, z jakimi mierzą się jednostki badawcze posiadające infrastrukturę dużych mocy obliczeniowych.