scholarly journals Towards Optimal Supercomputer Energy Consumption Forecasting Method

Mathematics ◽  
2021 ◽  
Vol 9 (21) ◽  
pp. 2695
Author(s):  
Jiří Tomčala
Keyword(s):  
Time Delay ◽  
Prediction Method ◽  
The Other ◽  
Random Time ◽  
Prediction Methods ◽  
Forecasting Method ◽  
Long Time ◽  
Computationally Intensive ◽  
Power Consumption Prediction ◽  
Consumption Prediction

Accurate prediction methods are generally very computationally intensive, so they take a long time. Quick prediction methods, on the other hand, are not very accurate. Is it possible to design a prediction method that is both accurate and fast? In this paper, a new prediction method is proposed, based on the so-called random time-delay patterns, named the RTDP method. Using these random time-delay patterns, this method looks for the most important parts of the time series’ previous evolution, and uses them to predict its future development. When comparing the supercomputer infrastructure power consumption prediction with other commonly used prediction methods, this newly proposed RTDP method proved to be the most accurate and the second fastest.

Comparison of Performance of Optimized Varela Immune Controller and PID Controller for Control of Time-Delay Process

2015 ◽  
Vol 18 ◽  
pp. 103-111
Author(s):  
Alexander Hošovský ◽  
Mária Tóthová ◽  
Kamil Židek
Keyword(s):  
Simulated Annealing ◽  
Time Delay ◽  
Time Constant ◽  
Temperature Control ◽  
Process Parameters ◽  
Pid Controller ◽  
Complex Structure ◽  
The Other ◽  
Nonlinear Controller ◽  
Long Time

Varela immune controller is a kind of nonlinear controller, which is said to have good anti-delay capabilities. We compare the performance of simulated annealing optimized improved Varela immune controller and optimized PID controller for controlling a process with very long time delay (approximation of biomass-fired boiler temperature control). The results confirm that Varela immune controller is indeed capable of stabilizing the process while being very robust even to extreme changes in process parameters (time constant and time delay). In addition to that, it is also found out that properly (optimally) tuned PID controller is capable of achieving similar performance. The problem of controller tuning is relevant for both controllers but there are no tuning rules for immune controllers, which might favor the use of conventional PID controller. On the other hand, Varela controller has greater flexibility due to its more complex structure, which might help to adapt it to some special kinds of processes.

Leading with Pedagogical Tact- a Challenge in Children's Sports in Sweden

2010 ◽  
Vol 19 (1-2) ◽  
pp. 127-147 ◽  
Author(s):  
Krister Hertting
Keyword(s):  
Daily Activity ◽  
The Other ◽  
Competitive Sport ◽  
Sports Clubs ◽  
Youth Politics ◽  
Pedagogical Tact ◽  
Children And Parents ◽  
Swedish Society ◽  
Long Time ◽  
Voluntary Commitment

Leading with Pedagogical Tact- a Challenge in Children's Sports in Sweden The purpose of this article is to elucidate and problemize meetings between children and leaders in children's sport. The competitive sport is high valuated in the Swedish society and sport for children is central in the Swedish youth politics. The foundation in Swedish sport, as well as in the other Nordic countries, has for a long time relied on voluntary commitment. Approximately 650 000 people are voluntary engaged as leaders in sport in Sweden and 70% of children between 7 and 14 years compete in sports clubs. There is, however, a tension in the Swedish sport system. The sports for children has double missions - ‘association nurturing’ and ‘competition nurturing’, missions which are not always in harmony. In the daily activity it is the voluntary leaders who have to deal with these missions, which creates a field of tension. In this article I argue for a bridge between these missions by a leadership based on pedagogical tact. The empirical outlook is a narrative based on statements from leaders, children and parents in a study dealing with voluntary leadership within children's football. In the end I argue that focusing on this bridge is a win-win situation, both for children and sports.

Introduction and overview of the current situation regarding the employment of biomass

2014 ◽  
pp. 691-697
Author(s):  
Suleiman José Hassuani
Keyword(s):  
Sugar Industry ◽  
Energy Generation ◽  
Current Situation ◽  
The Other ◽  
Significant Excess ◽  
Cane Juice ◽  
Energy Needs ◽  
Long Time ◽  
Biomass Availability ◽  
Sugarcane Industry

The sugarcane industry for a long time has focused only on the cane juice, its extraction and conversion to sugar. Bagasse was considered a residue and burnt inefficiently to generate steam and power. In the last decades, bagasse gradually started to be converted into energy in a more efficient way, supplying all the sugar industry energy needs (power, and steam) and, in some cases, significant excess electricity has been exported to the grid, becoming another important source of revenue. This motivated several studies of more advanced energy generation systems to boost energy exports. In more recent years, technologies called 2nd and 3rd generation have taken over the scene with many options, promising to convert biomass into more valuable products such as biofuels, chemicals, fertilisers, pellets, etc. Unfilled expectations and opportunities are rising. On the other hand, these technologies are competing for the same biomass, and this has to be considered. The industry has started to question ‘which way to go’, strategy and investment wise. The present study provides a broad scenario for the biomass availability, and its employment, with a close view to the main processes and products that might have an important role in the future of the biomass in the sugarcane industry.

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