Temat: artificial fish - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Simulation on vessel intelligent collision avoidance based on artificial fish swarm algorithm
Autorzy:: Li, W.
Ma, W.
Powiązania:: https://bibliotekanauki.pl/articles/260153.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: simulation
collision avoidance
artificial fish swarm algorithm
Opis:: TAs the rapid development of the ship equipments and navigation technology, vessel intelligent collision avoidance theory was researched world widely. Meantime, more and more ship intelligent collision avoidance products are put into use. It not only makes the ship much safer, but also lighten the officers work intensity and improve the ship’s economy. The paper based on the International Regulation for Preventing Collision at sea and ship domain theories, with the ship proceeding distance when collision avoidance as the objective function, through the artificial fish swarm algorithm to optimize the collision avoidance path, and finally simulates overtaking situation, crossing situation and head-on situation three classic meeting situation of ships on the sea by VC++ computer language. Calculation and simulation results are basically consistent with the actual situation which certifies that its validity.
Źródło:: Polish Maritime Research; 2016, S 1; 138-143
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Dual quaternions for the kinematic description of a fish-like propulsion system
Autorzy:: Kitowski, Zygmunt
Piskur, Paweł
Orłowski, Mateusz
Powiązania:: https://bibliotekanauki.pl/articles/11542693.pdf
Data publikacji:: 2023
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: dual quaternion
artificial fish
underwater vehicle
undulating propulsion system
kwaternion dualny
sztuczna ryba
pojazd podwodny
układ napędowy
Opis:: This study discusses the use of quaternions and dual quaternions in the description of artificial fish kinematics. The investigation offered here illustrates quaternion and dual quaternion algebra, as well as its implementation in the software chosen. When it comes to numerical stability, quaternions are better than matrices because a normalised quaternion always shows the correct rotation, while a matrix more easily loses its orthogonality due to rounding errors and oversizing. Although quaternions are more compact than rotation matrices, using quaternions does not always provide less numerical computation and the amount of memory needed. In this paper, an algebraic form of quaternion representation is provided which is less memory-demanding than the matrix representation. All the functions that were used to prepare this work are presented, and they can be employed to conduct more research on how well quaternions work in a specific assignment.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2023, 33, 2; 171--181
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Ways of optimization of breeding conditions of fish by using artificial spawning grounds
Autorzy:: Marenkov, Oleh
Fedonenko, Olena
Powiązania:: https://bibliotekanauki.pl/articles/1182952.pdf
Data publikacji:: 2016
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: fish
spawning
artificial spawning ground
artificial reefs
spawning nests
Opis:: The monograph presents ways of optimization of the reproduction of fish fauna due to the use of artificial spawning nests. There is classification of fish by nature, terms and conditions of the spawning course. Spawning nests divided according to the nature of fish spawning. There is given characteristic with describing and depicting of spawning grounds designs. It is indicated what species of fish and in what waters they can be used and also the efficiency and cost of their creation, use and maintenance. The book is intended for specialists in the field of ichthyology, ecology, hydrobiology, fisheries, public organizations activists, students and graduate students of higher educational institutions in "Biology" and "Water Biological resources".
Źródło:: World Scientific News; 2016, 49, 1; 1-58
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Reproduction of the round goby (Neogobius melanostomus) under controlled conditions
Rozród babki byczej, Neogobius melanostomus, w warunkach kontrolowanych
Autorzy:: Kuczyński, T.
Powiązania:: https://bibliotekanauki.pl/articles/111438.pdf
Data publikacji:: 2018
Wydawca:: Instytut Morski w Gdańsku
Tematy:: round goby
fish reproduction
alien species
artificial spawning
babka bycza
rozród ryb
gatunki obce
sztuczne tarło
Opis:: Learning mechanisms determining fish reproduction are particularly beneficial in the case of experimental work on juvenile forms of fish making research independent of the season of the year. This paper describes the reproduction method of the round goby, Neogobius melanostomus, under controlled conditions. This species is not native to the ichthyofauna of the Gulf of Gdańsk and was discovered here for the first time in 1990. In the case of pre-seasonal reproduction of the round goby, the first spawning took place 5 weeks after the beginning of thermal stimulation. On the other hand, artificial reproduction of the fish caught in the spring was possible after only a week of being kept in a temperature of 17-19°C. The spawn incubation period ranged from 17 to 22 days, depending on the temperature. For natural spawning, the period from spawning to hatching was 18-19 days, at a constant temperature of 20°C.
Poznanie mechanizmów warunkujących rozród ryb jest szczególnie korzystne w przypadku prac doświadczalnych na formach juwenilnych ryb, gdyż uniezależnia prowadzenie badań od pory roku. Praca opisuje metodę rozrodu babki byczej N. melanostomus w warunkach kontrolowanych. Gatunek ten nie jest rodzimym składnikiem ichtiofauny Zatoki Gdańskiej i został tu po raz pierwszy stwierdzony w 1990 roku. W przypadku przedsezonowego rozrodu babki byczej pierwszego tarła doszło po 5 tygodniach od rozpoczęcia stymulacji termicznej. Sztuczny rozród ryb odłowionych na wiosnę był natomiast możliwy już po tygodniu przetrzymywania w temperaturze 17-19 °C. Okres inkubacji ikry wynosił od 17 do 22 dni w zależności od temperatury. Dla tarła naturalnego czas od tarła do wylęgu wynosił 18-19 dni przy stałej temperaturze 20 °C.
Źródło:: Biuletyn Instytutu Morskiego w Gdańsku; 2018, 33, 1; 33-40
1230-7424
2450-5536
Pojawia się w:: Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Fishery and environmental situation assessment of water bodies in the Dnipropetrovsk region of Ukraine
Autorzy:: Fedonenko, Olena
Yakovenko, Volodymyr
Ananieva, Tamila
Sharamok, Tetiana
Yesipova, Natalia
Marenkov, Oleh
Powiązania:: https://bibliotekanauki.pl/articles/1158130.pdf
Data publikacji:: 2018
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Zaporizke Reservoir
artificial spawning grounds
epizootics
fish biochemistry
heavy metals
hydrochemical regime
ichthyofauna
nutrition base
small water bodies
Opis:: The monograph presents the results of a long-term research of water ponds biocenosis in the southeastern part of Ukraine. The Department of General Biology and Aquatic Bioresources at Oles Honchar Dnipro National University specialists carried out all the researches. The paper provides a detailed analysis of hydroecological situation in the large and small water bodies, which are used for fishery purposes. It is shown that in the water bodies of different types the total environmental problems are the pollution with organic substances, eutrophication, and anthropogenic pollution with heavy metal salts. Under conditions of increased anthropogenic pressure on water bodies, the biocenoses have gradually degraded. This is manifested in the disappearance of ecologically sensitive species of hydrobionts and the dominance of species with high adaptive abilities. An important problem of current water ecosystems is also the getting and mass distribution of spontaneous fish in fish pools, which actively compete with inhabitat species for the nutrition base and spawning grounds. Separate chapters of the monograph are devoted to physiological and biochemical indicators of industrial fish species, their health status and parasite infestation. In this work the practical recommendations have been given for increasing fish productivity in reservoirs and improving their ecological status at the southeastern Ukraine.
Źródło:: World Scientific News; 2018, 92, 1; 1-138
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki