1) establishes a traffic flow mechanical model based on information and control.
The general road traffic flow mechanical model has matured, and the establishment of traffic flow mechanical model based on information and control is an international research hotspot. By introducing adaptive cruise control and auxiliary signal control system, the candidate successfully gave a traffic flow mechanics model based on information and control, and deduced the stability conditions of the model. It is found that the adaptive cruise and auxiliary signal control system can improve the stability of traffic flow, restrain traffic congestion and improve traffic capacity. The research results have important theoretical and application value for building an advanced traffic control and management system. Relevant achievements have been published in famous journals at home and abroad, such as PhysicalReview E, European PhysicalJournal B, Chinese Physics, Physica A, International Journal of Modern Physics C, Journal of Physics, etc. And has been authorized by three national technology invention patents.
2) Analysis of urban traffic network carrying capacity based on travel behavior analysis.
What kind of urban traffic network topology can carry more traffic flow has always been a recognized problem in the field of traffic management. However, the existing research focuses on planning and designing the local structure of the road network from a micro perspective, while there is no progress in studying the relationship between the topological structure of the road network and the traffic carrying capacity from a macro perspective. Based on the theory of complex network and behavioral science, the candidate analyzed the traffic carrying capacity of three road network topologies. It is found that the scale-free road network topology can carry more traffic flow. The research results have important theoretical significance and application value for guiding the scientific planning of urban space-time structure and traffic demand management. 3) The optimal bus departure frequency and the optimal model of bus equilibrium assignment under crowded conditions are established.
The existing public transport allocation models generally assume that public transport vehicles have unlimited carrying capacity. How to solve this problem has always been the focus of international attention and research. On the basis of fully considering the actual carrying capacity of public transport, the candidate also considers the waiting time of passengers at bus stops and the number of times they need to transfer, constructs an optimization model of the optimal bus departure frequency and balanced car allocation under crowded conditions, and designs an effective solution algorithm. The research results have important theoretical support for improving the scientific nature of public transport management. Relevant research results were published in TransportationResearch-B, the top academic journal in the field of operation management, and internationally renowned journals such as Yearbook of Operation Research and European Journal of Operation Research. TR-B advisory editorial board, n&; Deputy Editor-in-Chief SE and Professor Watling from Leeds University fully affirmed the important contributions of candidates and others in establishing the optimal departure frequency modeling. The model proposed by Watling et al. is an extension and generalization on this basis. Gilbert Laporte, an academician of the Royal Canadian Society and a researcher at INFORMS, also included this achievement in the famous Handbook of Operation and Management Science (vol. 14).
4) An effective algorithm is designed to solve the traffic equilibrium assignment problem of road network.
The solution of traffic network assignment model has always been a hot research topic in the world, and the traditional feasible direction method is too inefficient, which hinders the practical application of advanced models. The candidate designed an algorithm based on nonmonotonic technology and decomposition technology for a large class of combined traffic assignment models, which greatly improved the calculation efficiency. A support function method for solving the discrete network design problem (NP-hard) is proposed, which partially solves this internationally recognized most challenging problem. At present, this algorithm is considered by international peers to be one of the four most effective algorithms for solving discrete network design problems in the world. Relevant research results were published in Transport Research-B, the top academic journal in the field of management and operational research, and internationally renowned journals such as European Journal of Operational Research and Applied Mathematics and Computing. Professor Stathopoulos of National Technical University of Athens systematically summarized the algorithms for solving international traffic network design problems (NP-hard) in the past 40 years. In this paper, the support function method proposed by candidates and others is listed as one of the four effective algorithms for solving D-NDP problems in the world today (the other three are internationally famous classical algorithms: branch and bound method; Lagrange relaxation method; Double descent method).
5) A new method to solve the train scheduling problem is proposed.
Scheduling problem is the core problem of making train operation plan, and it is also the hot and difficult point in the field of international transportation management. Based on the global information of rail transit, the candidate combines the simulation idea with the optimization method to establish the optimization model and algorithm of train scheduling problem. The research results are of great significance to guide the construction and operation management of China's rail transit system. Relevant research results were published in TransportationResearch-B, a top academic journal in the field of operation management. It is worth pointing out that this is the first time that mainland scholars have published papers in the field of rail transit management in this top academic journal in the field of operation management. Professor Carry, editor-in-chief of TR-B and professor of Carnegie Mellon University, fully affirmed this achievement and thought that "this paper gives an important extension … which should arouse great interest in the training and dispatching community."
6) Major application achievements made by candidates and research teams.
(1) The mixed traffic flow in Beijing's West Second Ring Road-Sanlihe area is deeply studied, and the traffic organization and management scheme of diverting mixed traffic flow in main sections and the phased implementation scheme of traffic congestion are put forward. The expert group's evaluation of the project is that "the research method is scientific, the technical route is accurate, the basic data is detailed, the research content is comprehensive, and the organizational optimization measures and improvement schemes proposed are highly convenient." I have done a lot of research work for the traffic organization and management of the Beijing Olympic Games and contributed to the smooth traffic of the Olympic Games.
(2) In 2006, the examinee signed an invention patent transfer contract with Beijing Sitong Intelligent Transportation System Integration Co., Ltd. to promote the application of the invention patent of intersection signal control owned by the examinee (see annex);
(3) Presided over the development of "Research on the Operational Benefit Model of Passenger Trains", and the results were used in Harbin Railway Bureau. User authentication "the operation result is reliable, the error rate is small, the required data is correct, and it truly reflects the benefit of passenger train operation".
7) The above research results have been actively cited by many famous experts and scholars in the field of international transportation and logistics management, such as Bell, Patrick Sen, Depalma, Nuzzolo, Lindsay, Chalabi, hickmann, Sumali, Vautrin, etc. According to the retrieval of China Institute of Science and Technology Information, this paper has been cited by SCI for more than 500 times.
8) Wirasinghe, an academician of the Canadian Academy of Engineering and a professor at the University of Calgary, spoke highly of the research work of the candidates and their teams.
Because "the research group has made great contributions in transportation and other aspects, and has calibrated and verified the model in the case study of Beijing, which has had a great impact in related fields. "。