scholarly journals Methods of Thrust Allocation in a DP Simulation System of Maritime University of Szczecin

2016 ◽  
Vol 23 (1) ◽  
pp. 209-218
Author(s):  
Paweł Zalewski

Abstract Vessels conducting dynamic positioning (DP) operations are usually equipped with thruster configurations that enable generation of resultant force and moment in any direction. These configurations are deliberately redundant in order to reduce the consequences of thruster failures and increase the safety. On such vessels a thrust allocation system must be used to distribute the control actions determined by the DP controller among the thrusters. The optimal allocation of thrusters′ settings in DP systems is a problem that can be solved by several convex optimization methods depending on criteria and constraints used. The paper presents linear programming (LP) and quadratic programming (QP) methods adopted in DP control model which is being developed in Maritime University of Szczecin for ship simulation purposes.

2021 ◽  
Author(s):  
LILAN CHEN ◽  
Yongsheng Chen

Abstract How to recruit, test and train the adaptive archive allocation system users, and how to assign the archive translation tasks to all available system users according to the optimal matching principle are still a problem that needs to be solved. With the help of proper names and terms in China’s Imperial Maritime Customs archives, this paper aims to solve the problem. When the corresponding translation, domain or attributes of a proper name or term is known, it will be easier for some archive translation tasks to be completed, and the adaptive archive allocation system will also improve the efficiency of archive translation task allocation and the quality of archive translation tasks. These related domains or attributes are different labels of these archives. To put it simply, multi-label classification means that the same instance can have multiple labels or be labeled into multiple categories, which is called multi-label classification. With the multi-label classification, archives can be classified into different categories, such as the trade archives, preventive archives, personnel archives, etc. The system users are divided into different professional domains by some tests, for instance, system users who are good at economic knowledge and users who have higher language skills. With these labels, the adaptive archive allocation system can make the optimal match between the archives and system users, so as to improve the efficiency and quality of archive translation tasks. In this paper, through multi-label classification, the adaptive archive allocation system can realize the optimal allocation of archive translation tasks to the system users. The optimal allocation is realized through the construction of optimization control model, and verifies that the adaptive archive allocation system can improve the performance of task allocation over time without the participation of task issuers.


Author(s):  
V. Ya. Vilisov

The article proposes an algorithm for solving a linear programming problem (LPP) based on the use of its representation in the form of an antagonistic matrix game and the subsequent solution of the game by an iterative method. The algorithm is implemented as a computer program. The rate of convergence of the estimates of the solution to the actual value with the required accuracy has been studied. The software implementation shows a high speed of obtaining the LPP solution with acceptable accuracy in fractions or units of seconds. This allows the use algorithm in embedded systems for optimal control.


2020 ◽  
Vol 7 (3) ◽  
pp. 1-11
Author(s):  
Marc J. Schniederjans ◽  
Deepak Madhavan ◽  
Dara G. Schniederjans

The goal of comprehensive epilepsy centers (CECs) is to diagnose and treat individuals with epilepsy and other episodic disorders. To do this, epilepsy specialists rely upon electroencephalographic (EEG) techniques. EEG is a central component of CECs, providing critical information for the diagnosis and management of patients with seizure disorders. Additionally, EEG is a critical revenue generator for epilepsy programs, allowing for sustained growth and expansion programs in most institutions. This study uses a linear programming model to determine optimal allocation of EEG resources within a CEC, specifically considering volumes of inpatient routine EEG, outpatient EEG, and inpatient Video-EEG monitoring. The study demonstrates that the most significant contributor to overall revenue to the program was available EEG technologist hours. This finding suggests that CECs should prioritize programs related to increased EEG technologist training, recruitment, and retention to maintain and expand revenue and procedure volume.


2019 ◽  
Vol 99 (1) ◽  
pp. 91-94
Author(s):  
A. V. Gasnikov ◽  
E. A. Gorbunov ◽  
D. A. Kovalev ◽  
A. A. M. Mokhammed ◽  
E. O. Chernousova

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