75 Result(s)
within
Qi** Li
Automotive Engineering
Regional/Spatial Science
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Article
Open AccessEnergy management strategy based on dynamic programming with durability extension for fuel cell hybrid tramway
This paper proposes an energy management strategy for a fuel cell (FC) hybrid power system based on dynamic programming and state machine strategy, which takes into account the durability of the FC and the hyd...
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Article
Open AccessWind tunnel measurement of aerodynamic characteristics of trains passing each other on a simply supported box girder bridge
The aerodynamic performance of high-speed trains passing each other was investigated on a simply supported box girder bridge, with a span of 32 m, under crosswinds. The bridge and train models, modeled at a ge...
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Article
Open AccessAn investigation into high-speed train interior noise with operational transfer path analysis method
Passengers' demands for riding comfort have been getting higher and higher as the high-speed railway develops. Scientific methods to analyze the interior noise of the high-speed train are needed and the operat...
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Article
Open AccessExperimental and numerical study on fretting wear and fatigue of full-scale railway axles
This study investigated the fretting wear and fatigue of full-scale railway axles. Fatigue tests were conducted on full-scale railway axles, and the fretting wear and fretting fatigue in the fretted zone of th...
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Article
Open AccessRandom dynamic analysis of vertical train–bridge systems under small probability by surrogate model and subset simulation with splitting
The response of the train–bridge system has an obvious random behavior. A high traffic density and a long maintenance period of a track will result in a substantial increase in the number of trains running on ...
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Article
Open AccessA preventive opportunistic maintenance method for railway traction power supply system based on equipment reliability
Conventional maintenance mode for the traction power supply system (TPSS) is to perform scheduled regular maintenance activities for power supply equipment, while such maintenance mode may result in undue main...
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Article
Open AccessPower management in co-phase traction power supply system with super capacitor energy storage for electrified railways
Increasing railway traffic and energy utilization issues prompt electrified railway systems to be more economical, efficient and sustainable. As regenerative braking energy in railway systems has huge potentia...
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Article
Open AccessVision-based vehicle detection and counting system using deep learning in highway scenes
Intelligent vehicle detection and counting are becoming increasingly important in the field of highway management. However, due to the different sizes of vehicles, their detection remains a challenge that dire...
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Article
Open AccessStatistical delay distribution analysis on high-speed railway trains
The focus of this study is to explore the statistical distribution models of high-speed railway (HSR) train delays. Based on actual HSR operational data, the delay causes and their classification, delay freque...
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Article
Open AccessImpacts of gradual automated vehicle penetration on motorway operation: a comprehensive evaluation
Gradual penetration of automated vehicles (AVs) into current motorway systems will usher the stage of mixed traffic in which AVs will coexist with human driven vehicles. Thus, there is an urgent need to identi...
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Article
Open AccessA new device for stress monitoring in continuously welded rails using bi-directional strain method
The technology of continuously welded rails (CWRs) is important in modern railway track structures. To measure rail stress, resistance strain gauges are preferred due to their good stability, sensitivity, and ...
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Article
Open AccessExperimental study of the gap between track slab and cement asphalt mortar layer in CRTS I slab track
Gap exists in the interface of cement asphalt emulsion mortar and CRTS I track slab universally, which is more severe at four corners than other parts of the track slab. In this work, the temperature and eleva...
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Article
Open AccessOverview of traffic incident duration analysis and prediction
Non-recurrent congestion caused by traffic incident is difficult to predict but should be dealt with in a timely and effective manner to reduce its influence on road capacity reduction and enormous travel time...
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Article
Open AccessRestrained mobility in a high-accessible and migrant-rich area in downtown Bei**g
Immigrant travel has become an emerging research field in transportation planning. A handful of scholars have studied the travel behavior of residents in immigrant enclaves in North America. However, thus far,...
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Article
Open AccessRail fatigue crack propagation in high-speed wheel/rail rolling contact
To study the wheel/rail rolling contact fatigue of high-speed trains, we obtain the distribution of contact forces between wheel and rail by introducing the strain-rate effect. Based on the finite element simu...
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Article
Open AccessThe use of freight apps in road freight transport for CO2 reduction
The purpose of this study was to investigate how a smart phone freight application service (Apps) could reduce CO2 emissions in road freight transport and to identify the core problems for improvements.
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Article
Open AccessInfluence of pantograph fixing position on aerodynamic characteristics of high-speed trains
To study the influence of the pantograph fixing position on aerodynamic characteristics of high-speed trains, the aerodynamic models of high-speed trains with eight cars were established based on the theory of...
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Article
Open AccessReview of recent progress in studies on noise emanating from rail transit bridges
In recent years, there has been rapid growth of Chinese rail transit networks. Many of these networks require elevated bridges. This results in a bridge-borne noise source, which occurs in addition to the main...
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Article
Open AccessAnalysis of the stress intensity factor of welded joints under prior corrosion and complex stress fields
Taking cruciform welded joints under different corrosion degrees, together with 45° inclined angle and full penetration load-carrying fillet, as the research object, the stress intensity factor of a quarter-ci...
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Article
Open AccessMechanism and effects of snow accumulations and controls by lightweight snow fences
This paper investigates the snowdrifts caused by lightweight fences along the lines on the flatland through the computational fluid dynamics method. The characteristic ambient flows around the solid fences and...
