
Yichen SunSouthwest Jiaotong University · School of Transportation and Logistics
Yichen Sun
Bachelor of Engineering
About
11
Publications
1,546
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
34
Citations
Introduction
Urban rail trainsit assignment
Education
September 2014 - May 2018
Publications
Publications (11)
Accurate Origin-Destination (OD) matrix prediction is crucial in realizing intelligent urban rail transit systems and improving public transportation service quality. However, OD matrix prediction faces several key challenges: (1) high-dimensional sparsity and imbalanced distribution of data, (2) monotonous feature representation, (3) exponential g...
Incorporating train control into the railway design process enables a practical and comprehensive evaluation of the lifecycle utility of a track profile. This paper proposes a novel integrated approach, termed EETC-VAO, which combines railway track Vertical Alignment Optimization (VAO) and Energy-Efficient Train Control (EETC). Initially formulated...
Network-level metro passenger flow prediction has always been one of the most important but most challenging scientific problems in intelligent transportation systems (ITS). However, conventional methods ignore the multi-dimensional topological relationships in the subway system or directly learn from the physical topological structure and fail to...
An accurate short-term passenger flow prediction provides essential data support for Urban Rail Transit (URT) organizations. However, the short-term URT passenger flow data is neither linear nor stationary, which results in the inaccuracy of prediction using only single deep-learning models. In this paper, we proposed a hybrid model that integrates...
Due to the complex temporal dependency and various external factors, it is challenging to capture its nonlinear and unsteady trends accurately. In addition, there are several inevitable errors in the traffic sensor record, including bias and noise. However, most recent works regard the record data as exact input ignoring the effect of unknown error...
The spreading of novel coronavirus (SARS-CoV-2) has gravely impacted the world in the last year and a half. Understanding the spatial and temporal patterns of how it spreads at the early stage and the effectiveness of a governments' immediate response helps our society prepare for future COVID-19 waves or the next pandemic and contain it before the...
The passenger route selection and passenger assignment are the basis of the analysis of the Urban Rail Transit (URT) passenger flow. A fast and efficient path search algorithm is of great significance for improving URT passenger management and operation planning. This paper reconstructs the urban rail transit network based on the network topology a...
As one kind of highest hierarchy node on the network, the transfer scheme of high-speed railway hub timetable should be studied at priority. After defining the problem that optimizing transfer scheme of timetable at high-speed railway hub, this paper proposes time adjusting strategy and platform adjusting strategy to optimize the problem, of which...
The construction of a railway hub logistics base system has many influencing factors and a high construction cost. There is an extremely important social and economic significance to the evaluation of its planning scheme. This study has obtained practical experience from a large number of existing railway hub planning schemes in China, using the an...
Questions
Questions (2)
Consider two different track profiles with the same terminal locations and elevations, labelled A and B. When a train is managed to operate with a Speed-Optimal-Strategy, which essentially means to arrive at the destination as fast as possible. It's found that: ① Profile A results in a quicker journey than Profile B, ② Profile A leads to lower energy consumption than Profile B, or ③ Profile A provides benefits in both time and energy efficiency.
My question is, under what specific conditions can we prove that, if the train operates with a fixed travel time T and adopts an Energy-Efficient-Strategy, profile A will still be more energy-efficient than profile B? Are there any studies or publications that have examined this or a similar topic?
I want to use a simple formula to represent the railway section running time based on a known track alignment, where the train adopts a speed-optimal control strategy. However, most current methods use relatively rough equalization speed methods, simulation methods and so on. Currently, much research on energy-efficient control uses running time as a constraint to solve the train control scheme. Is there research that studies the time-minimization-oriented train control strategy? Can a closed-form formula express the relation between track alignment and the section running time (speed-optimal train control strategy)?
I am quite new to this field, so feel free to recommend a fundamental textbook that might help.
Thanks.