The base for design of the ship control system lies in its mathematical model. There are known different linear and nonlinear models of the ship’s movement direction. The application of linear models is explained by the simplicity of their practical usage. However, nonlinear models are often more adequate to show a ship dynamics and, as result, provide more accurate design of the ship control system.
In this article there are proposed to use the power series as functions of angular velocity for describing a nonlinearity which presents viscous friction forces moments. Main idea includes the derivation of algorithm to adjust coefficients of power series that describe nonlinearity of ship’s model.
Theoretical base of the research is a method of speed gradient. To illustrate an approach there are given examples with four linear and nonlinear ship models.
ship control, linear model, nonlinear model, parameter identification, speed gradient method, adaptation algorithms, power series, numerical simulation
The analysis of software designed to manage the processes of maritime freight was done in the article. A number of flaws in the existing software used for organizing work in specific navigation areas, such as the Northern Sea Route, were identified, in particular the lack of decision support systems, the lack of analysis to calculate the time and cost of cargo delivery. The architecture of the intellectual system of maritime freight organization has been designed, which takes into account the difficult conditions of navigation in the Arctic. Architectures of two modules have been developed: calculation of the cost of maritime transportation; calculation and analysis of a safe and faster route depending on the month (season). The process of simulation is considered, which is based on the methods of artificial intelligence - the neural network, expert systems, the mathematical apparatus of fuzzy logic. The architecture of the intellectual system for the organization of maritime cargo transportation, if successfully implemented, will provide forecasting analytics to the management team of a shipping company, support decision making process, monitor the process of transportation of goods in real time, carry out calculation schemes for the effective use of icebreakers, calculate the optimal delivery route, provide on demand the online forecast of the transportation process at a certain point in time, minimize the cost of goods delivery, transit delays as well as the risks to the safety of cargo.
sea freight, Northern Sea Route, Arctic, intelligent control systems, simulation modeling
Previous studies related to the notation of the East Sea/Sea of Japan have been dominantly focused on the map publishers. However, in the academic world of Korea, recently, some researchers became interested in the media outlets, which work relatively autonomously and dynamically in dealing with the maps and the place names. The purpose of this study is therefore to derive the present state and the propagation paths of name-marking in each language area, the preferences for the name of the East Sea by language area, and the features of name-marking in overlapped language areas in the case of the Commonwealth and the Francophone Media. As a result of the study, the preferences for the name of the East Sea appear different by region even in the same language area. Also, in the region where the different language areas overlap, it is notable that they tend to accommodate the name-marking methods of the large media outlets in other language areas.
East Sea, Sea of Japan, Marine Names, Media, Commonwealth, Francophone, Notation Trends, Propagation Aspects
In the article the author specifies and analyzes, basing on his own views and positions, some aspects of Russian-Korean cooperation and Republic of Korea’s policy concerning the use of Northern sea route. Omitting the details, repeatedly described by other authors and researchers, he indicates geopolitical and economic significance of this region and designates the possible points of agreement between Moscow and Seoul. At the same time it is emphasized that they might be legally fixed in the interests of both partners.
Arctic, Russia, South Korea, icebreaking support, Northern sea route
All conclusions and views belong strictly to the author and express only his personal opinions.
Strait of Nevelskoy, Sakhalin, tunnel, bridge, Tatar Strait, cyclone, Cape of Lazarev
The article analyzes the problem of dormant territorial disputes of China. Reassessment of the role of China and intensification of its foreign policy strategy has had a significant influence on his approach to the solution of territorial disputes. It can create challenges not only for countries currently involved in territorial disputes with China, but also for those whose disputes with China were considered settled.
China, dormant territorial disputes, uncertain borders, foreign policy, security
the author considers and analyzes modern situation in territorial dispute between Korea and Japan about Liancourt (Dokdo/Takeshima) Islands. This article continues more detailed materials on the above topic with historical review of the problem and the directions of its possible solution which were published in the “Asia-Pacific Journal of Marine science& education”, vol.5, № 1, 2015, vol.6, no, 1, 2016. An objective analysis shows that the arguments of the Korean side in this dispute seem to be more weighty and justified. Generally speaking, the situation around Liancourt and the position of the Republic of Korea about it are very similar to some problems faced by Russia, for example the territorial dispute with Japan about the South Kurile Islands. So, it should be considered: does this not create a basis for expanding traditional political and economic cooperation between the Russian Federation and the Republic of Korea? In particular, our countries could cooperate in the questions of mutual security, for example to establish the demilitarized status of the Sea of Japan or, at least, to limit dangerous military activities in this area.
territorial dispute, Dokdo, Takeshima, Liancourt Islands, Korea, Japan, Russian Federation
The Kuril Archipelago is still one of the least explored regions in the Far East of Russia. Even the number of islands and islets composing the archipelago has not been properly estimated, and more than half of them do not have geographic names. The voluntary efforts of Sakhalin citizens supported by regional authorities have managed to change the situation for the better.
Kuril Archipelago, Sakhalin Regional Charter, naming expedition, territorial claims
Article deals with the problems of modern Russian-Japanese relations. The author researches possible new ways of cooperation between the two countries, which go beyond the traditional disputes about the so-called “northern territories”. The author puts forward the strategy of mutual interests and within its frames proposes to develop interstate relations on the basis of key perspectives in modern economic projects, which are of interest for both countries. Acting by such means Russia and Japan can help each other and supplement each other in bilateral relations. One of such opportunities can be the Russian Far East and the projects of the so-called “Eastern Vector”.
Asia-Pacific, Northeast Asia, Russia, Japan, territorial conflicts, international economic cooperation, Russian-Japanese relations, territories of advanced economic development, Porto Franco, mutual interests, mass media
International legal aspects of territorial dispute between Russia and Japan are analyzed in connection with claims of Japan to the Russian Southern Kurile Islands and possible conclusion of the peace treaty. It is shown, that the Joint Soviet-Japanese declaration of 1956 is similar to the peace treaty by its content. The San Francisco Peace Treaty of 1951 is studied and international legal consequences of transfer of Southern-Kurile islands to Japan are specified
Russian Federation, Japan, Kuriles, World War II, San Francisco Peace Treaty of 1951, Soviet-Japanese Declaration of 1956, territorial problem, peace treaty, international law.
© Admiral Nevelskoy Maritime State University, NPO «Asia-Pacific Journal of Marine Science&Education. Editors Board».