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715 results on '"Tan, Yiqiu"'

166. Improvement of evaluation indicator of interfacial interaction between asphalt binder and mineral fillers

Author

Guo, Meng, Tan, Yiqiu, Hou, Yue, Wang, Linbing, and Wang, Yiqi

Subjects
Fillers (Materials) -- Research -- Chemical properties, Surface tension -- Analysis, Binders (Materials) -- Research -- Chemical properties, Business, Construction and materials industries
Abstract

ABSTRACT The interfacial behavior between asphalt binder and mineral fillers directly effects the performance of asphalt mastics or asphalt mixture. However, the understanding about the interfacial interaction between these components [...]

Published
2017
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167. A Novel Methodology for Estimating the Capacity and Level of Service for the New Mega Elliptical Roundabout Intersection

Author

Mohamed, Ahmed I.Z., Ci, Yusheng, and Tan, Yiqiu

Subjects
Florida. Department of Transportation -- Analysis, Highways, Handbooks, Transportation industry
Abstract

Mega elliptical roundabout is a new intersection on rural multilane highways. This intersection was developed in a previous paper using simulation data, and the authors found that it is better than interchange (full cloverleaf) in most scenarios of traffic flow. Basically, there are no guidelines or procedures for designing mega elliptical roundabout in AASHTO Green Book, Federal Highway Administration guides, and Highway Capacity Manual. Thus, the purpose of this study is to analyze the traffic operation performance and propose a methodology for calculating the capacity of mega elliptical roundabout and also the level of service by gap acceptance theory. Moreover, this research studied the influence of different values of truck ratios and also different values of a major highway speed on geometric design and traffic operation performance for mega elliptical roundabout. To validate the thoroughness of the proposed methodology, VISSIM simulations were conducted. This research will assist practitioners in determining the appropriate geometric design, assessing mega elliptical roundabout intersections, and making comparisons with other alternatives., 1. Introduction The designs of conventional intersections cannot often relieve congestion without incurring increased conflicts and also significant improvement costs. Thus, there is a great need for alternative intersections offering [...]

Published
2020
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177. Effect of mineral fillers adsorption on rheological and chemical properties of asphalt binder

Author

Guo, Meng, Bhasin, Amit, and Tan, Yiqiu

Subjects
Rheology -- Analysis, Asphalt concrete -- Mechanical properties -- Analysis, Adsorption -- Analysis, Business, Construction and materials industries
Abstract

ABSTRACT An asphalt mastic imparts most of its characteristics to the asphalt concrete mixture and also dictates several forms of distresses in asphalt mixtures and pavements. Several studies have demonstrated [...]

Published
2017
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178. Research on local deformation property of asphalt mixture using digital image correlation

Author

Xing, Chao, Tan, Yiqiu, Liu, Xueyan, Anupam, Kumar, and Scarpas, Tom

Subjects
Concretes -- Analysis -- Mechanical properties, Aggregates (Building materials) -- Analysis, Asphalt -- Analysis -- Mechanical properties, Business, Construction and materials industries
Abstract

ABSTRACT Failure behavior of asphalt mixture is the process of local deformation accumulation, therefore, local deformation investigation is the base work of failure behavior. Digital image correlation (DIC) method is [...]

Published
2017
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180. Investigation on fatigue damage of asphalt mixture with different air-voids using microstructural analysis

Author

Hu, Jing, Liu, Pengfei, Wang, Dawei, Oeser, Markus, and Tan, Yiqiu

Subjects
Asphalt -- Mechanical properties -- Analysis, Fatigue testing machines -- Analysis, Image processing -- Analysis, Materials -- Fatigue, Microstructure -- Analysis, Business, Construction and materials industries
Abstract

ABSTRACT Fatigue damage caused by vehicle loads is the main asphalt pavement distress, and it deteriorates the serviceability and strength seriously. In order to evaluate the fatigue damage of asphalt [...]

Published
2016
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192. The thixotropic behavior of fresh cement asphalt emulsion paste

Author

Ouyang, Jian, Tan, Yiqiu, Corr, David J., and Shah, Surendra P.

Subjects
Asphalt -- Analysis -- Mechanical properties, Mortar -- Analysis -- Mechanical properties, Cement -- Analysis -- Mechanical properties, Business, Construction and materials industries
Abstract

ABSTRACT The workability of grouting cement asphalt emulsion (CA) mortar is governed by the intrinsic thixotropic behavior of CA paste, but limited information is reported about the thixotropic behavior of [...]

Published
2016
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197. Particle Swarm Optimization Algorithm-based Identification of Fractional-order Magnetic Levitation Systems

Author

Qing Yang, Jie Li, Qiang Chen, Tan Yiqiu, and Tianxin Liu

Subjects
Nonlinear system, Computer science, Control theory, Magnetic reluctance, Magnetic flux leakage, System identification, Particle swarm optimization, Magnetic levitation, Magnetic flux
Abstract

Magnetic levitation systems are strongly nonlinear systems with time-varying model parameters, many external disturbances, and open-loop instability. Most of the linearized modeling methods ignore the higher-order nonlinearity of the system to some extent and the physical characteristics of the system such as the leakage flux of the winding, the reluctance of the magnet core and the guideway, making the established model less accurate. In this paper, a particle swarm algorithm-based fractional order suspension system identification method is proposed to identify the unknown system into a more accurate fractional order model. The obtained fractional-order model is more accurate in depicting the actual system than the integer-order model, which is more conducive to the analysis of the system and the design of the controller.

Published
2021

199. Development of double-tangent method to determine transition points of three-stage permanent deformation of asphalt mixture.

Author

Zhang, Chao, Tan, Yiqiu, Fu, Yongkang, Lv, Huijie, Xiao, Shenqing, and Xiong, Xuetang

Abstract

The three-stage behavior is the most significant feature of permanent deformation of asphalt mixture under repeated loading, and the transition points, which refer to the dividing points of different stages, are commonly used as vital parameters to evaluate the rutting resistance. This study aims to propose a novel calculation method for transition points, which are with clear physical significance and independent of human factors. First, the effects of human factors on transition points of existing methods are assessed. As revealed from the research, the thresholds significantly impact the three-stage model method, while the termination condition and the iteration cycle significantly impact the two-step secant method and secant method with other steps, respectively. Subsequently, a three-step algorithm termed as a double-tangent method is proposed, and the physical significances of the transition points are clarified. The transition points obtained by the proposed method are proved to be of clear physical significance and independent of human factors. The slopes of the tangent line at the transition points equal to the strain rate value when the average strain rate equals to the instantaneous strain rate. Lastly, the differences of transition points and slopes between the proposed double-tangent method and existing methods are studied. [ABSTRACT FROM AUTHOR]

Published
2022
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