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Zhiyao Zhu, Huilong Ren, Xiuhuan Wang, Nan Zhao and Chenfeng Li
The limit state function is important for the assessment of the longitudinal strength of damaged ships under combined bending moments in severe waves. As the limit state function cannot be obtained directly, the common approach is to calculate the result...
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Jacek G. Puchalski, Janusz D. Fidelus and Pawel Fotowicz
One of the fundamental challenges in analyzing wind turbine performance is the occurrence of torque creep under load and without load. This phenomenon significantly impacts the proper functioning of torque transducers, thus necessitating the utilization ...
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Xin Shi, Pengfei Chen and Linying Chen
Due to the influence of the natural environment, it is very challenging to control the movement of ships to navigate safely and avoid potential risks induced by external environmental factors, especially for the development of autonomous ships in inland ...
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Weiwei Wang, Zhangjian Lu, Ye Tian, Lang Bian, Guoyong Wang and Lixin Zhang
Fused LEO navigation systems have been proposed as a low-cost means of supplementing and backing up global navigation satellite system (GNSS) navigation services based on low-earth orbit (LEO) constellations, which means broadcasting navigation signals b...
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Lixin Wang, Shang Tai, Ting Yue, Hailiang Liu, Yanling Wang and Chen Bu
The wind tunnel virtual flight test realizes the dynamic semi-free flight of the model in the wind tunnel through the deflections of the control surface and uses the test data to identify the aerodynamic derivatives. The difference in dynamics between th...
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Gokben Cevikcan and Oktay Tas
Securities firms are the leading institutions that facilitate the flow of funds by performing key services both in primary and secondary markets. The assessment of the efficiency of these firms has become a contemporary major issue due to the increasingl...
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Simon Grima, Letife Özdemir, Ercan Özen and Inna Romanova
With this study, we aimed to determine (1) the effect of the daily new cases and deaths due to the COVID-19 pandemic in the United States on the CBOE volatility index (VIX index) and (2) the effect of the VIX index on the major stock markets during the e...
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Zhongchi Liu, Sarat Chandra Mohapatra and C. Guedes Soares
A numerical model associated with wave?current interactions with a moored flexible cylindrical cage was developed based on the finite element method. An analytical model was formulated under the linearised wave theory and small structural response, and a...
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Guohui Wang, Yanan Yang and Shuxin Wang
Underwater thermal vehicles, as ocean observation tools, are frequently affected by environment disturbances such as waves and currents, which may cause degradation of the observation accuracy of the vehicles. Consequently, it is important to design a co...
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Fleurianne Bertrand and Emilie Pirch
This paper investigates numerical properties of a flux-based finite element method for the discretization of a SEIQRD (susceptible-exposed-infected-quarantined-recovered-deceased) model for the spread of COVID-19. The model is largely based on the SEIRD ...
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Karthikeyan Nainar and Florin Iov
Power-distribution grids consist of assets such as transformers, cables, and switches, of which the proper utilization is essential for the provision of a secure and reliable power supply to end customers. Distribution-system operators (DSOs) are respons...
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Gregorio Landi and Giovanni E. Landi
The Cramer?Rao?Frechet inequality is reviewed and extended to track fitting. A diffused opinion attributes to this inequality the limitation of the resolution of the track fits with the number N of observations. It will be shown that this opinion is inco...
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Manuel Schimmack and Paolo Mercorelli
This paper deals with an approximation of a first derivative of a signal using a dynamic system of the first order. After formulating the problem, a proposition and a theorem are proven for a possible approximation structure, which consists of a dynamic ...
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Yun-Peng Zhao, Qiu-Pan Chen, Chun-Wei Bi and Yong Cui
This study on hydrodynamic coefficients of a column-stabilized fish cage under wave action plays an important role in the anti-wave design of cages. The regular wave test was used to study the horizontal wave force of the jacket and column-stabilized fis...
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This paper proposes an adaptive phasor estimation algorithm based on a least square method that can suppress the adverse effect of an exponentially decreasing DC offset component in a phasor estimation process. The proposed algorithm is composed of three...
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Luciano Donizeti Varanda, André Luis Christoforo, Diego Henrique de Almeida, Diogo Aparecido Lopes Silva, Túlio Hallak Panzera, Francisco Antonio Rocco Lahr
Pág. 405 - 411
The aim of this study was to determine the modulus of elasticity (MOE) in static bending using two different calculation methods, a simple one based on Brazilian standard ABNT NBR 14810 (ABNT, 2006), and an alternative one, based on the Least Squares Met...
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Siriwan Intawichai and Saifon Chaturantabut
An accelerated least-squares approach is introduced in this work by incorporating a greedy point selection method with randomized singular value decomposition (rSVD) to reduce the computational complexity of missing data reconstruction. The rSVD is used ...
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Airton Marco Polidorio, Flavio Bortolozzi, Mauricio Figueiredo (Author)
Pág. 495 - 503
To make artificial vision or computer vision possible, it is necessary to solve a series of problems of reasonable complexity. The first problem is the calibration of the cameras which will be used by the artificial vision system. The calibration process...
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Tianjing Wang, Lanyong Zhang and Sheng Liu
Robust nonlinear filtering is an important method for tracking maneuvering targets in non-Gaussian noise environments. Although there are many robust filters for nonlinear systems, few of them have ideal performance for mixed Gaussian noise and non-Gauss...
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Svetlana S. Bodrunova, Andrey V. Orekhov, Ivan S. Blekanov, Nikolay S. Lyudkevich and Nikita A. Tarasov
The paper is dedicated to solving the problem of optimal text classification in the area of automated detection of typology of texts. In conventional approaches to topicality-based text classification (including topic modeling), the number of clusters is...
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