Safety Recognition Model of Urban Railway Level-Crossings Based on Attribute Mathematics Method

Focusing on the road-railway level-crossings of the urban, basing on the attribute mathematics methods, the access safety influence factors of the railway level-crossings are analyzed. Basing on the analytic hierarchy process method, the assessment indexes, which impair the level-crossings system safety status, are set. Firstly, the attribute measurements of every single-index are calculated by mean of the construction of attribute measurement functions. Secondly, according to the similarity function theory, the similarity weights of the influence factors are defined, so as to assess the multi-indexes measurements objectively. Finally, make use of the confidence criterion to recognize the level-crossing system safety. Taking one of the railway level-crossings in Dalian as an example, the assessment results show that the attribute recognition result would not be affected by the index weight, namely, the weight values of the assessing indexes are considered as the same. The study shows that the method is feasible, reliable and easy for the synthetic safety assessment of the urban railway level-crossings safety

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Fuzzy Analytic Hierarchy Process Based Reputation Evaluation for Generating Companies

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.556-562.6660 ◽

2014 ◽

Vol 556-562 ◽

pp. 6660-6664

Author(s):

Jun Xia Wang ◽

Ying Yu ◽

Xiao Hui Sun

Keyword(s):

Analytic Hierarchy Process ◽

Influence Factors ◽

Power Industry ◽

Fuzzy Analytic Hierarchy Process ◽

Analytic Hierarchy ◽

Numerical Examples ◽

Triangular Number ◽

Analytic Hierarchy Process Method ◽

Hierarchy Process ◽

Process Method

It is not easy to evaluate the reputation of generating companies as the influence factors are multiple, complex, and partly subjective. A fuzzy Analytic Hierarchy Process method (AHP) with a set of power industry relevant criteria is applied in this paper. The fuzzy triangular number is introduced to characterize the subjective judgment of experts, and AHP is used to deal with the multiple evaluation factors, and to calculate the relevant weights with the aid of the arithmetic laws of fuzzy triangular number. Numerical examples illustrate the effectiveness of this model.

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Research on Collision Avoidance Method of Car Anti-Head-and-Rear Based on Safe Distance Model

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.4435 ◽

2011 ◽

Vol 243-249 ◽

pp. 4435-4440 ◽

Cited By ~ 2

Author(s):

Zhong Liang Sun ◽

Xiao Kan Wang ◽

Shou Xiang Zai

Keyword(s):

Collision Avoidance ◽

Information Acquisition ◽

Influence Factors ◽

Safe Distance ◽

The Road ◽

Distance Model ◽

Speed Change ◽

Collision Avoidance System ◽

On The Road ◽

Real Time Information

The present rear-end collision accident proportion on the road increases day after day, car collision avoidance system is more and more paid attention. Analysising the existing car collision avoidance system, we propose a car anti-collision algorithm based on safe distance model in this paper. This method takes the influence factors of safety distance for main parameters which fully considers the speed change and the acceleration change of the car 1 and the car 2. It may realize real-time information acquisition and warning judgment according to the state of car 2, the car could automatic braking if necessary. VB simulation shows that the algorithm can effectively avoid collision, also automatically maintain the distance between vehicles, and lay a foundation for further research on the unmanned car.

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Study on the Dynamic Wheel Load of Multi-Axle Vehicle Based on Distribute Loading Weight

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.159.35 ◽

2010 ◽

Vol 159 ◽

pp. 35-40

Author(s):

Zhong Hong Dong

Keyword(s):

Dynamic Load ◽

Influence Factors ◽

Vehicle Speed ◽

Tire Pressure ◽

Wheel Load ◽

The Road ◽

Road Roughness ◽

Tire Stiffness ◽

On The Road

To study the dynamic wheel load on the road, a dynamic multi-axle vehicle mode has been developed, which is based on distribute loading weight and treats tire stiffness as the function of tire pressure and wheel load. Taking a tractor-semitrailer as representative, the influence factors and the influence law of the dynamic load were studied. It is found that the load coefficient increases with the increase of road roughness, vehicle speed and tire pressure, yet it decreases with the increase of axle load. Combining the influences of road roughness, vehicle speed, axle load and tire pressure, the dynamic load coefficient is 1.14 for the level A road, 1.19 for the level B road, 1.27 for the level C road, and 1.36 for the level D road.

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Research on the Sensitivity Assessment of Soil Erosion by AHP Method: A Case Study in the Northeast of Ordos Basin

E3S Web of Conferences ◽

10.1051/e3sconf/202019404020 ◽

2020 ◽

Vol 194 ◽

pp. 04020

Author(s):

Wang Wei ◽

Chen Sheming ◽

Zhu Lin ◽

Meng Lishan ◽

Cheng Rui ◽

...

Keyword(s):

Soil Erosion ◽

Ordos Basin ◽

Vegetation Coverage ◽

Analytic Hierarchy ◽

Soil Medium ◽

Healthy Development ◽

Sensitivity Assessment ◽

Index Weight ◽

Analytic Hierarchy Process Method ◽

Hierarchy Process

The ecological environment of Northeastern Ordos Basin which located in the Northwestern China belongs to arid and semi-arid area. The hazards of water and soil loss here are serious caused by gully river erosion. Since Soil erosion is an important factor leading to the destruction of regional ecology and has a profound impact on the long-term and healthy development of the economy and society, it is necessary to do research on the sensitivity analysis about soil erosion. In this study, the AHP (Analytic Hierarchy Process) method was used to determine the index weight of the factors for soil erosion, and made it more consistent with the whole regional condition. The results demonstrated that the soil medium, slope and vegetation coverage had the highest influence on soil erosion under the same climatic and meteorological conditions in the study area. This research evaluated the sensitivity factors and provided a significant guidance for soil erosion control.

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Getting the Attention of Drivers Back on Passive Railway Level Crossings: Evaluation of Advanced Flashing Lights

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198119828679 ◽

2019 ◽

Vol 2673 (2) ◽

pp. 789-798 ◽

Cited By ~ 6

Author(s):

Grégoire S. Larue ◽

Christopher N. Watling ◽

Alexander A. Black ◽

Joanne M. Wood

Keyword(s):

Eye Tracker ◽

Level Crossings ◽

The Road ◽

Road Signs ◽

Road Users ◽

Alternative Approach ◽

High Prevalence ◽

Rail Industry ◽

Scanning Behavior ◽

On The Road

Improving safety at railway level crossings remains a priority for the rail industry internationally, as they remain a significant hazard. A high proportion of collisions occur at passive level crossings, because of their high prevalence and their lower effectiveness at mitigating the risks that road users encounter at such crossings. The unreasonable cost required to upgrade them to incorporate active warnings implies that such crossings will remain on the road, and that alternative approaches are required. Drivers tend to make errors at such crossings, and this can be related to approaching such level crossings at speeds that are too high, exhibiting reduced scanning behaviors to look for trains, and not complying with stop signs at the crossing. An alternative approach is to upgrade the advanced signage with active flashing lights activated by road vehicles, aimed at reducing looked-but-failed-to-see errors and reinforcing the behavior expected from road users at such crossings. A field trial was conducted in New Zealand that evaluated how approach speeds and the visual scanning behavior of 27 drivers, recorded with an eye tracker, changed with such treatments. It was found that the presence of road vehicle-activated advanced signage provided a range of benefits for drivers unaware of the presence of a passive crossings, such as increasing drivers’ attention to road signs through drivers fixating on signage for longer durations and reduced (slower) approach speeds. Further research is needed to evaluate whether these benefits are sustained over time, and whether this can minimize complacency resulting from familiarity.

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Impact on Perceptual Speed to Geometry Pattern

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.274.567 ◽

2013 ◽

Vol 274 ◽

pp. 567-570

Author(s):

Nai Qun Wu ◽

Yao Jun Shi

Keyword(s):

Influence Factors ◽

Movement Pattern ◽

Research Development ◽

Perceptual Speed ◽

Special Design ◽

The Road ◽

Pattern Speed ◽

Velocity Perception ◽

On The Road ◽

The Relationship

After the research on the velocity perception, and the analysis and studies to the effect generated from various illusion forms of movement pattern speed, surveys of perceptual speed and physical speed differences, know the features of impacting the speed to perceive the special design. Form an interest that reflects a picture on the road of the geometry impact. Through the study, then prove the relationship and influence factors between the perceptual speed and geometry, which makes contribution to research development of road mode.

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A Pick-Up Points Recommendation System for Ridesourcing Service

Sustainability ◽

10.3390/su11041097 ◽

2019 ◽

Vol 11 (4) ◽

pp. 1097 ◽

Cited By ~ 2

Author(s):

Wanqiu Zhu ◽

Jian Lu ◽

Yi Yang

Keyword(s):

Traffic Management ◽

Recommendation System ◽

Road Traffic ◽

Second Step ◽

Huge Amount ◽

Analytic Hierarchy ◽

The Road ◽

Spatial Distribution Characteristics ◽

On The Road

In the ridesourcing industry, drivers are often unable to quickly and accurately locate the waiting position of riders, but patrol or wait on the road, which will seriously affect the management of the road traffic order. It may be a good idea to provide an online virtual site for the taxi to facilitate convergence of the rider and driver. The concept of recommended pick-up point is presented in this paper. At present, ridesourcing service platforms on the market have similar functions, but they do not take into account whether the setting of the pick-up point is compatible with the actual traffic environment, resulting in some problems. We have invented a method to select the recommended pick-up point by integrating various traffic influencing factors, so as to ensure that the setting of the pick-up point is compatible with the actual traffic situation, which consists of three steps. Firstly, we studied the rider’s maximum tolerable waiting time and defined an attractive walking range for riders based on the huge amount of data. In the second step, we analyzed spatial distribution characteristics of the taxi demand hotspot and determined candidate pick-up locations. Lastly, the fuzzy analytic hierarchy method was used to select the recommended pick-up point that is most conducive to traffic management from multiple candidate points. A case study was conducted to validate the proposed approach and experimental evidence showed that recommended results based on the approach are in line with the actual situation of the road, and conducive to road traffic management. This recommendation method is based on real ridesourcing orders data.

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