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231.
Edgar Gold 《WMU Journal of Maritime Affairs》2004,3(1):51-66
This article addresses the growing concern over the diminishing legal rights and increasing responsibilities of those in command of ships today. A number of high-profile maritime accidents have focussed on the dilemma faced by shipmasters who appear to be held responsible for actions over which they have little or no control. This seems to indicate that the traditional privilege and honour associated with command appears to have become a risky burden. The article discusses the legal rights and responsibilities that shipmasters have today in terms of international maritime law and policy. Four case studies are utilized to illustrate the problem. 相似文献
232.
FU Ming-Yu BIAN Xin-Qian SHI JiCollege of Power Nuclear Engineering Harbin Engineering University Harbin China 《船舶与海洋工程学报》2002,1(1):41-46
All kinds of reasons are analysed in theory and a fault repository combined with local expert experiences is establishedaccording to the structure and the operation characteristic of steam generator in this paper. At the same time, Kohonen algo-rithm is used for fault diagnoses system based on fuzzy neural networks. Fuzzy arithmetic is inducted into neural networks tosolve uncertain diagnosis induced by uncertain knowledge. According to its self-association in the course of default diagnosis. thesystem is provided with non-supervise, self-organizing, self-learning, and has strong cluster ability and fast cluster velocity. 相似文献
233.
LI Qing-fen WANG Peng REN Zheng-yi and LONG Ping School of Mechanical & Electrical Engineering Harbin Engineering University Harbin China 《船舶与海洋工程学报》2003,2(2):1-4
In this paper, the effect of plastic constraint on the initiation of ductile tears in four different shipbuilding structural steels has been experimentally studied by measuring the J-integral and crack opening displacement COD at initiation in three-point bend specimens with deep and shallow notches. Experimental results of seven groups of different strength alloy steels show that both Si and Ji values of ductile tear from the shallow crack specimens which have less constraint flow field are significantly higher than those of deeply notched specimens. Slip-line-field analysis shows that, for shallow crack, the hydrostatic stress is lower than that from standard deeply cracked bend specimen, which develops a high level of crack tip constraint, provides a lower bound estimate of toughness, and will ensure an unduly conservative approach when applied to structural defects, especially if initiation values of COD and J-integral are used. 相似文献
234.
LIU Ya-dong LI Ji-de LI ZhenCollege of Shipbuilding Engineering Harbin Engineering University Harbin China 《船舶与海洋工程学报》2002,1(2):6-11
In this paper a 3-D panoramic simulation system of a ship is described which is developed with the MAXSCRTPT language and VC + + as programming tools on the platform of 3 Dsmax. The strip theory method is applied to the motion prediction of the mono-hull. The time history solutions of heave and pitch are obtained in the condition of head sea to provide the primary data on panoramic simulation. The simulation system has following functions: 1) digital simulation; 2 ) panoramic simulation; 3) environmental set-up; 4) render preview and output. 相似文献
235.
Bernhard Berking 《WMU Journal of Maritime Affairs》2003,2(1):61-78
The Universal Automatic Identification System (AIS) provides a huge variety of potential applications and services which exceed
the well known ship-to-ship data exchange. The purpose of this paper is to address the most important AIS services, in particular
the AIS position report and the AIS safety-related and binary messages (“AIS telegrams”). The main issue is the impact of
this new technology on the on-board use of AIS in collision avoidance (and its limitations) as well as the impact on shore-based
services such as Vessel Traffic Service (VTS), port management and the need of an effective AIS network. 相似文献
236.
237.
Bin Wu 《WMU Journal of Maritime Affairs》2003,2(1):17-32
As a global labour market exists for international shipping, a challenging issue facing this industry is to get access to
reliable, accurate and timely information of seafarers’ demand and supply. Related to the deregulation environment and great
variety in the availability and quality of relevant information, an enquiry into the global seafaring labour market is more
complex than a national labour force survey. To cope with the challenge, a novel approach has been developed by the Seafarers
International Research Centre (SIRC) at Cardiff University. Viewing capital (ship), labour (seafarers) and services (cargo
or passengers) as interconnected and interwoven to each other, it collects and analyses crew lists from main ports world-wide,
resulting in the creation of the first global seafarers database. The purpose of this paper is explain its methodological
principles, and to illustrate its application potential. Taking the cruise sector as an example, research findings and methodological
implications are highlighted. 相似文献
238.
Udo Helge Fox 《WMU Journal of Maritime Affairs》2007,6(1):75-87
Just twenty five years have passed since the International Maritime Organization (IMO) provided the legal and internationally
harmonized framework for maritime search and rescue operations. While a number of nations only had to adapt their well-established
national services it took great efforts for other nations to develop agencies able to fulfil or outstrip minimum requirements.
However, the majority of nations (well aware of the humanitarian nature of that task) have been afraid to cope with this challenge
and the related financial burdens since the benefits to local, regional, or even national economies are not always clear to
the relevant national administrating authorities. 相似文献
239.
WANG Jian-fang LI Ji-de and CAI Xin-gongSchool of Shipbuilding Engineering Harbin Engineering University Harbin China 《船舶与海洋工程学报》2003,2(2):31-39
In this paper, a 3D source distribution technique is used to calculate the coupled motions between two ships which advance in the wave with the same speed. The numerical results of coupled motions for a frigate and a supply ship have a good agreement with the experimental results. Based on the 3D coupled motions of two ships, a spectral analysis is employed to clearly observe the effect of speed, clearance and wave heading on the significant relative motion amplitude (SRMA) of two ships.The method presented in this paper will be helpful to select suitable clearance, speed and wave heading for underway replenishment at sea(RAS). 相似文献
240.
In this paper, we estimate a multinomial probit model of work trip mode choice in Seoul, Korea, using the Bayesian approach with Gibbs sampling. This method constructs a Markov chain Gibbs sampler that can be used to draw directly from the exact posterior distribution and perform finite sample likelihood inference. We estimate direct and cross-elasticities with respect to travel cost and the value of time. Our results show that travel demands are more sensitive to travel time than travel cost. The cross-elasticity results show that the bus has a greater substitute relation to the subway than the auto (and vice versa) and that an increase in the cost of an auto will increase the demand for bus transport more so than that of the subway. 相似文献