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Large-scale maritime simulation platform faces the contradiction among timeliness, accuracy and integrity in the data collection, storage, analysis and exploitation, due to the features of maritime big data, such as large-volume, multi-source heterogeneity, abruptness and high noise. With this background, in order to deal with the complexity and imperfectness of maritime big data, this paper employs...
The increase in passengers and tramcars will wear down existing rail structures faster. This is forcing the rail infrastructure asset owners to incorporate asset management strategies to reduce total operating cost of maintenance whilst improving safety and performance. Analyzing track geometry defects is critical to plan a proactive maintenance strategy in short and long term. Repairing and maintaining...
Parking guidance system is an important mean to alleviate status quo of urban static traffic, improve the level of city traffic management and protect the urban environment. Timely and accurate information of remaining berths plays an important role in the parking guidance system which guides the driver to find a parking space efficiently. Therefore, this paper focused on the prediction methods of...
The original methodological approach is proposed to solve analytical problems in a life cycle of complex systems operation for developing and transportation hydrocarbon deposits of Arctic regions. On the base of the proposed probabilistic modelling of processes the following analytical problems may be solved: 1) for ecologically safe sea investigation, extraction and transportation of various kinds...
Uncertainty is inherent in almost any project and complex system, and aircraft maintenance is not an exception. During its execution, unexpected damage, failures and discrepancies may be found, which must be corrected by programming unscheduled tasks. However, due to the stochastic nature of these unforeseen events, it is difficult to plan unscheduled activities and then to estimate the resources...
With the rapid economic development, the inland navigational environment has undergone tremendous changes. Ships are facing with several environmental impacts during the voyage, such as variation of water level, strong waves, poor visibility and so on. The safety issue of inland waterway transportation system (IWTS) confronts significant challenges. This paper identifies the safety critical factors...
This paper uses the data provided by AIS as the sources of information and combines the actual needs for ship collision avoidance perception. Considering the major factor for ship collision impact, a mathematical model of risk evaluation is established for embedded system, and a new design of AIS-based embedded system for ship collision avoidance is proposed. By utilizing an ARM platform, the system...
As an indispensable component of the ship, marine shafting system transmits power generated by the main engine to the propeller, and at the same time transmits propeller thrust to the hull, and therefore drives the ship ahead. Torsional vibration does lots harm to ship shaft system, brings a serious threat to the safe navigation of the ship. The method of power flow considers the amplitude and phase...
Compared with plane fracture problem, elastic-plastic fracture problem of stiffened plate under bending has its particularity and inevitability for research, and its essence is a three-dimensional fracture mechanics problem. The aim of this paper is to develop a method to analyze bending elastic-plastic fracture of stiffened plates with crack in plate based on Dugdale model, combined with the Paris...
Extraction of traffic parameters, such as queue length, stop delay and etc, of a road section between intersections is significant for traffic signal control. It is a challenge to get high precision parameters by video processing technologies during peak hours, for the serious vehicle queue. We propose a method of acquiring traffic parameters based on detecting traffic waves at intersections. We use...
This paper analyzes the input-output model based on data envelopment analysis (DEA), puts forward an input-output model of the vessel traffic services (VTS) based on DEA and builds the input and output index of this model combining with the demand characteristics of the running VTS' efficiency assessment. Combining with an instance of VTS, this paper analyzes the algorithm of the proposed model and...
The pollution of the navigable waters brought by canal shipping can't be ignored, so it has become a widely concerned issue to reduce ship emissions so as to weaken their impact on canal water resources. In our country, canal ship with external shore-based cables still in the research stage, but it has very big development perspective. Based on this, primarily select the fleet transport organization...
This paper takes a 298,000T VLCC as the research object and the whole ship finite element model is built up for numerical analysis. The aim of this paper is to calculate and analyze the bearing reaction force of a VLCC under different loading case and wave parameter. Based on the analysis of the calculation results, rules of bearing reaction forces are concluded and discussed, which can be used for...
To assess the reliability of marine propulsion shafting, an assessment model is established based on systemlevel stress — strength interference analysis, where the relationship between component failure probability attribute and stress-strength distribution was described. Different from the conventional system reliability estimation method by which system reliability was calculated directly from component...
With the great improvement of operational speed of trains, the on-board ATP of the high-speed railway plays an essential role in train's safe operation as a major component of the signal system. Therefore, it is necessary and important to identify and assess risks in the on-board ATP. In this paper, a quantitative risk assessment method is proposed based on the Bow-tie model. Event trees are exploited...
“Road rage” has been a concern to traffic safety and management authorities. In order to provide an effective detection of angry driving behavior, it is necessary to provide a method for discriminating angry driving from normal. Thirty professional drivers were recruited for conducting on-road experiments in Wuhan, China. The drivers were required to finish the experiment within 110 minutes and their...
This paper presents a composite element evaluation model of urban mountain road safety. First, create multi-level indicators of road safety, which are divided into the cost, benefit, fixed and interval. Second, build evaluation matrix of composite element for mountain city road traffic safety, use information entropy theory to describe uncertainty of portray Indices in order to calculate the composite...
The 12 streamers towed system is the main exploration equipment of seismic survey vessel. Based on the model of Ablow and Schechter's finite difference method, this paper presents a numerical scheme to get the dynamic properties of towed system which the length of cables is changeable in a uniform flow by adding the virtual mass point. Then the dynamic simulation of the seismic survey vessel towed...
According to the features of the high temperature's impacts on inland shipping, the impacts were divided into light, moderate and severe level. Based on the series data of temperature time in seventeen stations which near the coastal area of Middle Yangtze River during the period between 1965 and 2008, the characteristics of climate variations influenced by the high temperature are analyzed and discussed...
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