scholarly journals Ubiquitous Wireless Power Transfer for Multiple Mobile Devices

2021 ◽  
Author(s):  
Alexander Decker de Souza ◽  
Luiz Filipe Menezes Vieira ◽  
Marcos Augusto Menezes Vieira
Keyword(s):  
Dynamic Programming ◽  
Mobile Devices ◽  
Linear Time ◽  
Greedy Algorithms ◽  
Dynamic Programming Algorithm ◽  
Wireless Power Transfer ◽  
Programming Algorithm ◽  
Power Transfer ◽  
Wireless Power ◽  
Programming Algorithms

We propose two new computational problems associated with the charging of mobile devices using wireless power transfer via magnetic induction. Algorithms for these problems may enable ubiquitous charging, meaning the user is no longer required to be aware of the devices charging processes. We prove both problems as being NP-Hard and propose three dynamic programming algorithms to solve them in linear time regarding the size of the time horizon. We also propose three greedy algorithms for the problems. Experiments indicate that the best dynamic-programming algorithm among those proposed reaches between 89% and 97% of effectiveness, while the best greedy reaches between 74% and 92%, depending on the considered scenario.

scholarly journals Dynamic Programming Algorithms for Computing Optimal Knockout Tournaments

Mathematics ◽  
2021 ◽  
Vol 9 (19) ◽  
pp. 2480
Author(s):  
Amelia Bădică ◽  
Costin Bădică ◽  
Ion Buligiu ◽  
Liviu Ion Ciora ◽  
Doina Logofătu
Keyword(s):  
Dynamic Programming ◽  
Complexity Analysis ◽  
Dynamic Programming Algorithm ◽  
Experimental Results ◽  
Programming Algorithm ◽  
Programming Approach ◽  
Optimal Algorithms ◽  
Running Time ◽  
Dynamic Programming Approach ◽  
Programming Algorithms

We study competitions structured as hierarchically shaped single-elimination tournaments. We define optimal tournaments by maximizing attractiveness such that the topmost players will have the chance to meet in higher stages of the tournament. We propose a dynamic programming algorithm for computing optimal tournaments and we provide its sound complexity analysis. Based on the idea of the dynamic programming approach, we also develop more efficient deterministic and stochastic sub-optimal algorithms. We present experimental results obtained with the Python implementation of all the proposed algorithms regarding the optimality of solutions and the efficiency of the running time.

scholarly journals Dynamic Programming Algorithms Applied to Musical Counterpoint in Process Composition: An Example Using Henri Pousseur’s Scambi

2020 ◽  
Author(s):  
Louis J. Cochrane ◽  
Derek Gatherer
Keyword(s):  
Dynamic Programming ◽  
Electronic Music ◽  
Dynamic Programming Algorithm ◽  
Pairwise Alignment ◽  
Distance Matrix ◽  
Programming Algorithm ◽  
Biological Sequence ◽  
Dynamic Programming Matrix ◽  
Process Composition ◽  
Programming Algorithms

The Needleman-Wunsch process is a classic tool in bioinformatics, being a dynamic programming algorithm that performs a pairwise alignment of two input biological sequences, either protein or nucleic acid. A distance matrix between the tokens used in the sequences is also required as input. The distance matrix is used to generate a positional pairwise similarity matrix between the input sequences, which is in turn used to generate a dynamic programming matrix. The best path through the dynamic programming matrix is navigated using a traceback procedure that maximises similarity, inserting gaps as necessary. Needleman-Wunsch can align both nucleic acids or proteins, which use alphabets of size 4 and 20 tokens respectively. It can also be applied to any other kind of sequence where distance matrices can be specified. Here, we apply it to chains of Pousseur’s Scambi electronic music fragments, of which there are 32, and which Pousseur categorised by their sonic properties, thus permitting the consecutive construction of distance, similarity and dynamic programming matrices. Traceback through the dynamic programming matrix thus produces contrapuntal duet compositions in which two Scambi chains are played in the maximally euphonious manner, providing also an illustration of the principles of biological sequence alignment in sound.

Omnidirectional wireless power transfer system supporting mobile devices

2016 ◽  
Vol 122 (2) ◽  
Author(s):  
Bang-Jun Che ◽  
Fan-Yi Meng ◽  
Yue-Long Lyu ◽  
Wen-Liang Zhu ◽  
Kuang Zhang ◽  
...  
Keyword(s):  
Mobile Devices ◽  
Wireless Power Transfer ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Wireless Power Transfer System
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