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Gao, Xing (author), Zhao, J. (author), Wang, M. (author)The continuous flow intersection [CFI) is an unconventional intersection design which has been used in many cities all over the world. However, as an important parameter for the geometric design, signal timing, and operation evaluation, the saturation flow rate at CFI has not been carefully examined. In this paper, a saturation flow rate...journal article 2020
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Zhao, J. (author), Kiptoo Kigen, Kevin (author), Xia, Xiaomei (author)The lane closures caused by the work zone at the approaches create a negative impact on the operational effectiveness of the signalized intersections. This paper presents an innovative design for intersections with work zones to improve the intersection’s practical capacity. In this design, the lanes in the leg with work zone can be used...journal article 2020
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Zhao, J. (author), Gao, Xing (author), Knoop, V.L. (author)To improve the practical capacity of the continuous flow intersections (CFI)<br/>and eliminate the conflict between left-turn bicycles and through vehicles,<br/>an optimization design method for left-turn bicycles was proposed.<br/>The pre-stop line for through vehicles and the crossing passage for leftturn<br/>bicycles were set at the pre...journal article 2019
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Yao, Jiao (author), Ni, Yiling (author), Zhao, J. (author), Niu, Huiwei (author), Liu, Shanyong (author), Zheng, Yuhui (author), Wang, Jin (author)Violation probability of taxi drivers in metropolis is far more than that of normal drivers because they are labor-intensive, overconfident of self-driving skill, and always searching potential customers, sometimes even picking up or dropping off passengers randomly. In this paper, four types of violated behavior of taxi drivers in metropolis...journal article 2019
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Zhao, J. (author), Zheng, J. (author), Peng, Gai Fei (author), van Breugel, K. (author)High-performance concrete (HPC) is vulnerable to spalling under high temperature conditions and it has been found that the heating rate can exert a tremendous effect on spalling of HPC. To prevent HPC from spalling, the heating rate effect should be understood. However, quantitative analyses are still lacking and the heating rate effect has...journal article 2017
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Zhao, J. (author), Vollebregt, E.A.H. (author), Oosterlee, C.W. (author)The boundary element method (BEM) is widely used in fast numerical solvers for concentrated elastic contact problems arising from the wheel-rail contact in the railway industry. In this paper we extend the range of applicability of BEM by computing the influence coefficients (ICs) numerically. These ICs represent the Green's function of the...journal article 2016
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Donkers, S (author), Ledoux, H. (author), Zhao, J. (author), Stoter, J.E. (author)Although the international standard CityGML has five levels of detail (LODs), the vast majority of available models are the coarse ones (up to LOD2, i.e. block-shaped buildings with roofs). LOD3 and LOD4 models, which contain architectural details such as balconies, windows and rooms, rarely exist because, unlike coarser LODs, their construction...journal article 2016
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Zhao, J. (author), Vollebregt, E.A.H. (author), Oosterlee, C.W. (author)In this paper we extend the range of applicability of the boundary element method (BEM) for concentrated elastic contact problems by computing the influence coefficients (ICs) numerically. These ICs represent the Green's function of the problem, i.e. the surface deformation due to unit loads. For the half-space they are analytically available....report 2015
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Zhao, J. (author)Rail transportation plays an important role in our everyday life, and there is fast development and modernization in the railway industry to meet the growing demand for swifter, safer and more comfortable trains. At the same time, the security of train operation and the maintenance of rails have to be considered. A lot of research on these...doctoral thesis 2015
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Zhao, J. (author), Vollebregt, E.A.H. (author), Oosterlee, C.W. (author)In this paper we extend the range of applicability of the boundary element method (BEM) for concentrated elastic contact problems by computing the influence coefficients (ICs) numerically. These ICs represent the Green's function of the problem, i.e. the surface deformation due to unit loads. For the half-space they are analytically available....report 2015
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Zlatanova, S. (author), Liu, L. (author), Sithole, G. (author), Zhao, J. (author), Mortari, F. (author)This report makes an overview of 2D, 2,5D and 3D approaches for indoor space subdivision for the purpose of indoor navigation. The report starts with a conceptual framework for indoor space utilisation. We introduce and elaborate on the concepts of indoor space (navigable and non-navigable), agent, activity, resource and modifier. Using these...report 2014
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Biljecki, F. (author), Ledoux, H. (author), Stoter, J.E. (author), Zhao, J. (author)The level of detail in 3D city modelling, despite its usefulness and importance, is still an ambiguous and undefined term. It is used for the communication of how thoroughly real-world features have been acquired and modelled, as we demonstrate in this paper. Its definitions vary greatly between practitioners, standards and institutions. We...journal article 2014
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Zhao, J. (author), Vollebregt, E.A.H. (author), Oosterlee, C.W. (author)This paper presents a fast numerical solver for a nonlinear constrained optimization problem, arising from a 3D frictional contact problem. It incorporates an active set strategy with a nonlinear conjugate gradient method. One novelty is to consider the tractions of each slip element in a polar coordinate system, and use azimuth angles as...report 2014
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Biljecki, F. (author), Zhao, J. (author), Stoter, J.E. (author), Ledoux, H. (author)This review paper discusses the concept of level of detail in 3D city modelling, and is a first step towards a foundation for a standardised definition. As an introduction, a few level of detail specifications, outlooks and approaches are given from the industry. The paper analyses the general uncertainties and shortcomings around the concept of...conference paper 2013
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- Ledoux, H. (author), Meijers, M. (author), Arroyo Ohori, K. (author), Zhao, J. (author) conference paper 2013
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Zhang, Z. (author), Delsing, A.C.A. (author), Notten, P.H.L. (author), Zhao, J. (author), Dorenbos, P. (author), Hintzen, H.T. (author)Mn2+-doped CaAlSiN3 phosphors have been prepared by a solid-state reaction method at high temperature and the solubility of Mn2+ in the host lattice as well as their photoluminescence properties were investigated. In CaAlSiN3, not only Ca2+ sites, but also Al3+ sites can be substituted by Mn2+ ions. CaAlSiN3 : Mn2+ absorbs blue light in the...journal article 2013
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Zhao, J. (author), Stoter, J. (author), Ledoux, H. (author), Zhu, Q. (author)Many 3D GIS applications require 3D building models with different LoD (Level of Detail) that satisfy certain quality criteria. However, because of their complexity, most detailed 3D building models available are still produced manually, which results in inevitable geometric and topological errors. These errors hinder the downstream processing...conference paper 2012
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- Zhao, J. (author) doctoral thesis 2012
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Zhao, J. (author), Li, J. (author), Yan, H. (author), Zheng, L. (author), Dai, Z. (author)Analysis on the hydrologic characteristics of the main stream of the Yangtze River and Poyang Lake were studied to discuss the water exchange between the main stream of the Yangtze River and Poyang Lake before and after the operation of Three Gorges Reservoir, as well as in the typical dry year of 2006. The annual runoff distribution for dry...journal article 2011
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- Zhao, J. (author) journal article 1998