Results 31 to 40 of about 1,090,569 (315)

Objective Assessment of Maritime VHF Communication Competence Using a Real-Time Simulation Framework [PDF]

open access: yesTransNav
VHF radiotelephony remains a fundamental component of maritime safety and is mandated by the STCW Convention as an essential operational competency for seaferer.
Xuan Long Nguyen   +2 more
doaj   +1 more source

Optimization methods and algorithms

open access: yesCentral European Journal of Operations Research
AbstractRecent results of three areas, pickup and delivery, optimal mass transportation, matching under preferences are highlighted. The topics themselves have been selected from the active research fields of Hungarian Operations Research. We also provide a short summary of selected research results from the 34th Hungarian Operations Research ...
Péter Biró 0001   +3 more
openaire   +3 more sources

Optimizing transient gas network control for challenging real-world instances using MIP-based heuristics

open access: yesOpen Journal of Mathematical Optimization
Optimizing the transient control of gas networks is a highly challenging task. The corresponding model incorporates the combinatorial complexity of determining the settings for the many active elements as well as the non-linear and non-convex nature of ...
Hennings, Felix   +2 more
doaj   +1 more source

Study of North Finding System with Low-cost MEMS Gyro Sensor and 3-axis Small Turntable under Non horizontal and Magnetically Disturbed Environments for UUVs [PDF]

open access: yesTransNav
This study developed a north-finding system using low-cost sensors and a small 3-axis turntable, even in non-horizontal and magnetically disturbed environments.
Taisei Hayashi, Daisuke Terada
doaj   +1 more source

Comparing policy gradient and value function based reinforcement learning methods in simulated electrical power trade [PDF]

open access: yes, 2012
In electrical power engineering, reinforcement learning algorithms can be used to model the strategies of electricity market participants. However, traditional value function based reinforcement learning algorithms suffer from convergence issues when ...
Burt, Graeme   +7 more
core   +1 more source

Signal synthesis by means of evolutionary algorithms [PDF]

open access: yes, 2011
In this article, we investigate a procedure for generating signals with genetic algorithms. Signals are obtained from elementary patterns characterized by different degrees of freedom.
B. Sareni   +5 more
core   +1 more source

Incorporating Probabilistic Mutual Interactions in Simulation-Based Safety Evaluation of Maritime Autonomous Surface Ships [PDF]

open access: yesTransNav
This paper proposes a “Probabilistic Reactive Target Model” that generates avoidance behaviors for target ships to evaluate the collision avoidance algorithms of Maritime Autonomous Surface Ships (MASS) in a realistic simulation environment.
Mikihisa Ishii, Hitoi Tamaru
doaj   +1 more source

Operational Optimization of Parallel Diesel Generator Systems for Enhanced Fuel Efficiency and Emissions Reduction in DP Vessels [PDF]

open access: yesTransNav
The present paper analyses the optimisation of the parallel operation of diesel generator (DG) systems on board dynamically positioned (DP) vessels, using the Kongsberg Challenger III model vessel as a reference platform.
Nicoleta Acomi, Andrei Preda
doaj   +1 more source

Accurate Algorithms for Spatial Operations on the Spheroid in a Spatial Database Management System

open access: yesApplied Sciences, 2021
Some of the most powerful spatial analysis software solutions (Oracle, Google Earth Engine, PostgreSQL + PostGIS, etc.) are currently performing geometric calculations directly on the ellipsoid (a quadratic surface that models the earth shape), with a ...
José Carlos Martínez-Llario   +2 more
doaj   +1 more source

Automated Valuation Models (AVMs): Machine Learning, namely Mass (Advanced) Valuation Methods and Algorithms [PDF]

open access: yes, 2021
Digitalisation is becoming increasingly common within the valuation sector. Thus, it is vital to understand how traditional valuation methods are being replaced by machine learning technology, namely mass (advanced) valuation methods. According to Soni
Demirci, O.
core   +1 more source

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