Juanxiu Zhu

Juanxiu Zhu
Xihua University | XHU · Institute of Transportation

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33
Publications
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280
Citations

Publications

Publications (33)
Preprint
Hybrid electric vehicles (HEVs) are perceived as transitional products bridging the gap between fueled vehicles and electric vehicles (EVs) because people intuitively believe that EVs are more environmentally friendly than HEVs. But is this perception true in the context of carsharing services (CSSs)? This paper pioneers ageneral large-scale multi-...
Preprint
Full-text available
Abstract: The COVID-19 pandemic has affected communities worldwide. The metro system, an essential means of public transportation in many cities, is particularly vulnerable to the spread of the virus due to its limited space and complex passenger flow structure. As the basis of quick and effective management decision-making, it is very important bu...
Article
Full-text available
The emergence of connected autonomous vehicles (CAVs) provides a possibility to develop an efficient and sustainable mobility option. To foster the adoption of CAVs, the dedicated CAV lanes have been widely discussed in terms of optimal planning and allocating infrastructures for CAVs. Meanwhile, a sensible operation manner of dedicated lanes is al...
Article
Full-text available
The lane-changing behavior is one of the important causes in traffic accident in congest traffic, and many behaviors of change lane affect volume of traffic. When autonomous driving vehicles are running on road with human-driven vehicles, the effects of change lane on traffic are different. In all human-driven vehicles traffic, the vehicle behavior...
Article
Full-text available
Modelling the mixed traffic flows of autonomous vehicles (AVs) and human-driven vehicles (HVs) on highways is challenging. Randomness, fluctuations, and congestion exist in the mixed traffic flows. This paper extends the current literature by proposing an M/G(n)/c/c state-dependent queuing model operating in a random environment. The fluctuating tr...
Article
Detecting various types of attack traffic is critical to computer network security. The current detection methods require massive amounts of data to detect attack traffic. However, in most cases, the attack traffic samples are unbalanced. A typical neural network model cannot detect such unbalanced attack traffic. Additionally, malicious network no...
Article
Full-text available
Robust optimal design of circulation systems (e.g., roads for vehicles or corridors for pedestrians) relies on an accurate steady-state traffic flow model that considers the effect of randomly changing environmental factors (e.g., daily periodicity and weather). Most analytical models assume that the customer interarrival time and service time of c...
Article
The Internet of things (IoT) has attracted extensive research attention in recent years. Cyber-attack protection for IoT devices has become critically important. Malicious users or attackers can take control of IoT devices, thereby putting a wide range of IoT security and privacy data at risk. Thus, the detection and prevention of new attack types...
Article
Full-text available
The behavior of changing lanes has a great impact on road traffic with heavy traffic. Traffic flow density is one of the important parameters that characterize the characteristics of traffic flow, and it will also be affected by the behavior of changing lanes, especially in the case of each lane. The penetration of autonomous vehicles can effective...
Article
Full-text available
Accurately modeling dynamic traffic circulation systems, such as roads for vehicles and corridors for pedestrians, is of great importance for the planning, design, operation and management of circulation systems. The traffic demand of circulation systems is time-varying and congestion-dependent, the service ability is state-dependent (i.e., it drop...
Preprint
Full-text available
Accurately modelling circulation systems for vehicles or pedestrians in a random changing environment (RE) is of great importance. Most researches assume the traffic demand and the service ability of circulation facilities are independent of the external RE, which is unrealistic in most cases. In this paper, we develop a PH/PH(n)/C/C state dependen...
Preprint
Full-text available
Accurately modeling dynamic traffic circulation systems, such as roads for vehicles and corridors for pedestrians, is of great importance for the planning, design, operation and management of circulation systems. The traffic demand of circulation systems is time-varying and congestion-dependent, the service ability is state-dependent (i.e., it drop...
Article
Full-text available
This paper describes third-party logistics (3PL) systems with consolidation hubs as a hub-and-spoke network. We propose a multiple assignment (MA) model for the joint design of the fleet size and the number, locations and capacities of hubs. The objective is to minimize the total costs, including congestion costs. We explicitly model the road conge...
Article
Full-text available
Width design of the urban rail transit stations circulation facilities is a vital issue. The existing width design approach failed in fully considering the essential factors such as fluctuation in passengers' arrival process, fluctuation and state-dependence in passengers walking speed and the blocking when passengers' demand exceeds the capacity o...
Article
Full-text available
The optimal design of the walkway at an urban rail transit station is a vital issue. The Transit Capacity and Quality of Service Manual (TCQSM) TCRP-100 report for the design of urban rail transit station walkway and the existing design models neglect the important factors such as randomness in the passenger arrival rate, randomness and state-depen...
Article
Full-text available
Width is crucial to the performance of circulation network in urban rail transit station. However, poor performance has been observed in most existing circulation systems. In fact, randomness and state-dependence exist in circulation network where blocking and feedback cannot be ignored. In this paper, we develop a PH(n)/PH(n)/C/C state-dependent q...
Article
Modeling and Discrete-Event Simulation (DES) is usually used in the planning, design and control of traffic and transportation systems. The existing design code for analysis of metro transit station walkways ignores the randomness of passenger arrival and service time of walkways. Moreover the existing analytical approach for analysis is highly com...
Article
Metro station corridor and passengers are described as a G/G(n)/C/C state-dependent queuing system with a general random arrival interval G and a general random and state-dependent service time G(n) to offset the shortcomings in existing design methods. The corresponding G/G(n)/C/C state-dependent discrete event simulation model is developed, and i...
Article
Research purposes: The width ofsubway footwaydetermines the level of service and the efficiency of circulation. To meet the given level of service and the demand of volatility, a queuing model considering the randomness and state-dependence of the passenger arrival and serviceis established to describe the footway queuing phenomenon, andthenthe qua...
Article
Full-text available
Metro station corridor width design considering demand fluctuation as well as the randomness and state-dependence of service time is an urgent concern and a complicated random planning issue. This paper confirms the accuracy of phase-type distribution (PH) fitting for passenger arrival intervals and service times with randomness and state-dependenc...
Article
In the present paper, hyper-Erlang distribution (HErD) which is a restricted class of phasetype distribution (PH) with good versatility and analyticity and seven common distributions are used to fit the distribution of time interval between arriving passengers. From the comparison of a large number of experiments, the fitting effect of HErD is prov...
Article
In the present paper, hyper-Erlang distribution (HErD) which is a restricted class of phase-type distribution (PH) with good versatility and analyticity and seven common distributions are used to fit the distribution of time interval between arriving passengers. From the comparison of a large number of experiments, the fitting effect of HErD is pro...
Article
The urban railway transit station is a type of stochastic service system. The accurate description for the arrival interval distribution of the passenger flow with strong randomness is the basis of the planning, design and operation of the urban rail transit stations; however, the existing fitting distributions are not accurate enough to satisfy th...
Article
Although a large number of different methods for establishing the fitting parameters of PH distributions to data traces (PH fitting) have been developed, most of these approaches lack efficiency and numerical stability. In the present paper, a restricted class of PH distribution, called the hyper-Erlang distribution (HErD), is used to establish a m...
Conference Paper
To compensate for the defect that the existing norm of metro channel width does not take the service level into account, the metro channel and passengers were described as a queuing system, and a queuing optimization model was built based on the parameter characteristics. Doing so introduces the service level of passengers into the calculation of m...
Conference Paper
Agency is one of the effective methods to relieve the pressure of ticket office. Its' rational planning and layout has practical significance for increasing ticket sales and the convenience of passenger travel. This paper analyzes the influencing factors and uses of AHP to quantify them to determine a preliminary distribution of agencies. The paper...
Article
An optimization model of variable speed-limit control with the object of the least accident rate and the limitations of cost and speed was set up,in which the number of variable message signs and corresponding variable limit speeds were determined.The distances between variable message signs were computed by using the traffic wave model,and the opt...

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