Shijun Yu

Dr. Shijun Yu

orcid

Research Focus & Metrics

Academic Career Length

18Years (2009-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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27 October 2021 in Applied Sciences
Verified
Journal Article
Open access
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ZHZhiwei Hou
Zhiwei Hou
SYShijun Yu
Shijun Yu
TJTao Ji
Tao Ji
Suburban tourist railway is an emerging transportation mode for tourism. Knowing the travel demand and trip distribution patterns of tourists is an important prerequisite to the planning and construction of suburban tourist railways. However, this issue has attracted very little research attention so far. Therefore, this paper proposes a forecasting model focused on the trip distribution of tourists who travel with the suburban tourist railway. Based on the analysis of the characteristics of tourists’ trips and the use of the trip chain method, the frequency, order, distance, and visiting volume of stay points of the trips of tourists have been intensively studied. Then, a tourist trip distribution forecasting model was built in this paper. It uses the Entropy-Maximizing theory to predict trip chain distribution probability and obtain the distribution of tourists within the city. A case study that takes the H city as an example was conducted to test the proposed model. The results of this case show that the output of the model can reflect the real trip distribution characteristics of tourists very well, which demonstrates the applicability and effectiveness of the proposed model.

29 August 2021 in Journal of Advanced Transportation
Verified
Journal Article
Open access
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HYHongru Yu
Hongru Yu
SDShejun Deng
Shejun Deng
CLCaoye Lu
Caoye Lu
YTYucheng Tang
Yucheng Tang
SYShijun Yu
Shijun Yu
TJTao Ji
Tao Ji
The entrance and exit area of parking facilities has the characteristics of high concentration of urban traffic and prominent traffic intertwining phenomenon, which easily induces rapid congestion of mixed heterogeneous traffic at specific times and local locations and quickly spreads to the entire road section or even a larger area. In order to better understand the congestion distribution characteristics and propagation effects of access section of the parking entrance and exit from the mid and microperspective, a 5 m lane width pixel grid is used to divide the frontage road research. It also proposes a spatially robust autoregressive model and complex network tools suitable for analysis of local traffic flow to analyze it. The results show that as spatial scale increases, the congestion propagation decreases sharply and spatial adjacency within the fourth order can account for more than 90% of the propagation; the frontage road to the entrance and exit is the place where the congestion first happens, and the congestion gradually attenuates as it propagates to the inner lane and the upstream of the road segments; the lateral congestion propagation attenuates faster, so the area affected by congestion is mainly distributed in the outermost lane. This paper can provide theoretical guidance for alleviating traffic congestion in the entrance and exit areas of parking facilities and has theoretical and empirical significance.

29 July 2009
Verified
Conference Paper
Closed access
SYShijun Yu
Shijun Yu
CCCongyong Cao
Congyong Cao
YLYingshun Liu
Yingshun Liu
The development status of urban public transportation, one component of the public services system, directly reflects the urban travel conditions and the overall level of urban development. Evaluating the satisfaction of public transportation service from passengers' point of view is helpful to improvement of the level of services of the urban public transportation systems. Firstly, the evaluation index system of public transportation's satisfaction degree is put forward. Then based on cloud model, which is an effective tool in transforming between qualitative concepts and their quantitative expressions, a comprehensive evaluation model is constructed. In this evaluation model, fuzzy and random qualitative concepts are integrated, uncertainty expressions are mapped to different cloud particles, variations of weight are mapped to mathematical expectation of cloud, and the satisfaction degree of public transportation is evaluated. Finally, it is proved that the evaluation model is efficient and effective by an applicative example.

21 October 2024 in Applied Sciences
Verified
Journal Article
Open access
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YDYue DOU
Yue DOU
SDShejun Deng
Shejun Deng
HYHongru Yu
Hongru Yu
TLTingting Li
Tingting Li
SYShijun Yu
Shijun Yu
JZJun Zhang
Jun Zhang
Bus drivers have an important role in ensuring road safety, as their driving circumstances fluctuate due to the combined influence of physiological, psychological, and environmental dynamics, which can cause complex and varied driving dangers. Quantifying and assessing drivers’ risk characteristics under various scenarios, as well as finding the best fit with their work schedules, is critical for enhancing bus safety. This research first uses the entropy weight method, which is based on historical warning data, to examine the risk characteristics of bus drivers in various complicated contexts. It then creates an objective function targeted at minimizing the operational risk for a specific bus route. This function uses the quasi-Vogel approach and an improved simulated annealing algorithm to optimize and restructure the scheduling table, taking individual driver risk characteristics into account. Finally, the analysis is confirmed and examined with actual operational data from the Zhenjiang Bus Line 3. The data show that enhanced bus operations resulted in a 7.22% gain in overall safety and a 33.76% improvement in balancing levels. These insights provide valuable theoretical guidance as well as practical references for the safe operation and administration of public buses.

14 November 2019 in Promet - Traffic&Transportation
Verified
Journal Article
Open access
PDF file
SZSiyuan Zhang
Siyuan Zhang
SYShijun Yu
Shijun Yu
SDShejun Deng
Shejun Deng
QNQinghui Nie
Qinghui Nie
PZPengpeng Zhang
Pengpeng Zhang
CCChen Chen
Chen Chen
Bike-and-Ride (B&R) has long been considered as an effective way to deal with urbanization-related issues such as traffic congestion, emissions, equality, etc. Although there are some studies focused on the B&R demand forecast, the influencing factors from previous studies have been excluded from those forecasting methods. To fill this gap, this paper proposes a new B&R demand forecast model considering the influencing factors as dynamic rather than fixed ones to reach higher forecasting accuracy. This model is tested in a theoretical network to validate the feasibility and effectiveness and the results show that the generalised cost does have an effect on the demand for the B&R system.

5 January 2009
Verified
Conference Paper
Closed access
SYShijun Yu
Shijun Yu
CCCong-Yong Cao
Cong-Yong Cao
YLYing-Shun Liu
Ying-Shun Liu
This paper proposes a stochastic user equilibrium assignment model for intercity multi-commodity multi-modal networks, together with a solution algorithm. Firstly, a multimodal network representation model is proposed. It consists of transfer nodes such as cities, seaports and airports, as well as different modal links that connect those nodes. Then based on the behavioral foundation of Stochastic User Equilibrium, a variational inequality problem is formulated that is equivalent to the stochastic user equilibrium assignment model for intercity multi-commodity multi-modal networks. The proposed model which considers the transfer costs effect on route choice explicitly, can simultaneously estimate flows and costs on modal links and transfer links. Finally, the streamlined diagonal algorithm is employed to solve the proposed model and a numerical example is used to illustrate the applications of the proposed model.