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Algorithms, Volume 13, Issue 6

June 2020 - 24 articles

Cover Story: Geophysical inversion can estimate the spatial distributions of physical subsurface properties, such as electrical conductivity (EC), from non-invasive surface measurements. The geophysical inverse problem is virtually always ill-posed and the resulting subsurface models of the physical property are non-unique. To reduce non-uniqueness, it is beneficial to consider multiple measurements simultaneously in so-called joint inversions. Using vertical electrical sounding and frequency-domain electromagnetic data, the uncertainty of an EC subsurface model can be quantified using Bayesian inversion. We demonstrate the Kalman ensemble generator for Bayesian joint inversion. The Kalman ensemble generator provides an efficient alternative to standard Markov chain Monte Carlo approaches. View this paper
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Articles (24)

  • Article
  • Open Access
4 Citations
3,530 Views
20 Pages

26 June 2020

In this paper, we develop a novel computation model of Intuitionistic Fuzzy Values with the usage of fuzzy negations and Archimedean copulas. This novel computation model’s structure is based on the extension of the existing operations of intui...

  • Article
  • Open Access
6 Citations
4,740 Views
19 Pages

26 June 2020

In this paper, a novel graph model to figure Collision-Free Multiple Traveling Salesman Problem (CFMTSP) is proposed. In this problem, a group of vehicles start from different nodes in an undirected graph and must visit each node in the graph, follow...

  • Article
  • Open Access
4 Citations
4,036 Views
10 Pages

24 June 2020

The increase in memory and in network traffic used and caused by new sequenced biological data has recently deeply grown. Genomic projects such as HapMap and 1000 Genomes have contributed to the very large rise of databases and network traffic relate...

  • Article
  • Open Access
3 Citations
3,461 Views
16 Pages

24 June 2020

Wireless sensor networks (WSNs) can provide data acquisition for long-term environment monitoring, which are important parts of Internet of Things (IoT). In the WSN-assisted IoT, energy efficient routing algorithms are required to maintain a long net...

  • Article
  • Open Access
1 Citations
4,115 Views
13 Pages

A Distributed Approach to the Evasion Problem

  • Denis Khryashchev,
  • Jie Chu,
  • Mikael Vejdemo-Johansson and
  • Ping Ji

23 June 2020

The Evasion Problem is the question of whether—given a collection of sensors and a particular movement pattern over time—it is possible to stay undetected within the domain over the same stretch of time. It has been studied using topologi...

  • Article
  • Open Access
3 Citations
5,443 Views
25 Pages

Fibers of Failure: Classifying Errors in Predictive Processes

  • Leo S. Carlsson,
  • Mikael Vejdemo-Johansson,
  • Gunnar Carlsson and
  • Pär G. Jönsson

23 June 2020

Predictive models are used in many different fields of science and engineering and are always prone to make faulty predictions. These faulty predictions can be more or less malignant depending on the model application. We describe fibers of failure (...

  • Article
  • Open Access
6 Citations
3,975 Views
19 Pages

22 June 2020

This work considers model reduction techniques that can substantially decrease computational cost in simulating parmetrized Allen–Cahn equation. We first employ the proper orthogonal decomposition (POD) approach to reduce the number of unknowns...

  • Article
  • Open Access
3,111 Views
11 Pages

Local Comparison between Two Ninth Convergence Order Algorithms for Equations

  • Samundra Regmi,
  • Ioannis K. Argyros and
  • Santhosh George

20 June 2020

A local convergence comparison is presented between two ninth order algorithms for solving nonlinear equations. In earlier studies derivatives not appearing on the algorithms up to the 10th order were utilized to show convergence. Moreover, no error...

  • Article
  • Open Access
14 Citations
6,085 Views
24 Pages

19 June 2020

The world’s oceans are under stress from climate change, acidification and other human activities, and the UN has declared 2021–2030 as the decade for marine science. To monitor the marine waters, with the purpose of detecting discharges of tracers f...

  • Article
  • Open Access
71 Citations
8,460 Views
60 Pages

A Survey on Approximation in Parameterized Complexity: Hardness and Algorithms

  • Andreas Emil Feldmann,
  • Karthik C. S.,
  • Euiwoong Lee and
  • Pasin Manurangsi

19 June 2020

Parameterization and approximation are two popular ways of coping with NP-hard problems. More recently, the two have also been combined to derive many interesting results. We survey developments in the area both from the algorithmic and hardness pers...

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Algorithms - ISSN 1999-4893Creative Common CC BY license