Journal of Modern Transportation
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Magnetic levitation performance of high-temperature superconductor over three magnetic hills of permanent magnet guideway with iron shims of different thicknesses
Journal of Modern Transportation - Tập 22 - Trang 187-193 - 2014
Superconducting magnetic levitation performance, including levitation force and guidance force, is important for the application of high-temperature superconducting maglev. Both of them are not only affected by different arrays of superconductors and magnets, but also by the thickness of the iron shim between permanent magnets. In order to obtain the best levitation performance, the magnetic field......
Distribution characteristics and influencing factors of the frequency-domain response of a vehicle–track vertical coupled system
Journal of Modern Transportation - Tập 24 - Trang 166-176 - 2016
Employing theory on vehicle–track coupled dynamics, the equation of motion of a vehicle–track vertical coupled system was established by combining frequency analysis and symplectic mathematics. The frequency response of the vehicle–track vertical coupled system was calculated under the excitation of the German low-interference spectrum, and the effects of the vehicle speed, vehicle suspension para......
Bluetooth as a traffic sensor for stream travel time estimation under Bogazici Bosporus conditions in Turkey
Journal of Modern Transportation - Tập 24 - Trang 207-214 - 2016
Travel time estimation is an integral part of Intelligent Transportation Systems, and has been an important component in traffic management and operations for many years. Travel time, being spatial in nature, requires spatial sensors to measure it accurately. Bluetooth is emerging as a promising technology for the direct measurement of travel time, and is reported in a few studies from homogenous ......
Asymptotic analysis of multi-branch two-way amplify-and-forward relaying in Nakagami-m fading with arbitrary fading parameter
Journal of Modern Transportation - Tập 20 - Trang 249-254 - 2013
Two-way relay networks have received lots of attention, thanks to its ability to overcome the loss in the spectral efficiency due to half-duplex transmission. Asymptotic performance analysis can provide valuable insights into practical system designs. However, this is a gap in two-way relay network. In this paper, the asymptotic performance is studied for multi-branch dual-hop two-way amplify-and-......
Chaotic movement of vortices in superconductors of high-Tc superconducting maglev system at a high speed
Journal of Modern Transportation - - 2012
Impact of shield tunneling on adjacent spread foundation on sandy cobble strata
Journal of Modern Transportation - Tập 22 - Trang 244-255 - 2014
The section of shield tunnel of the Chengdu Metro line passes primarily through sandy cobble strata. There are many buildings with spread foundations along the lines. Shield tunnel construction will disturb the ground, causing displacement or stress to adjacent spread foundations. Based on the similarity theory, a laboratory model test of shield tunnel driving was carried out to study the influenc......
Dispatch coordination between high-speed and conventional rail systems
Journal of Modern Transportation - Tập 19 - Trang 19-25 - 2013
Cross-line trains, as a link between high-speed and conventional rail networks, will increase the complexity of transport organization and lead to significant challenges in dispatch coordination between the two systems. Based on the characteristics of high-speed transport organization, this paper deals with the necessity of dispatch coordination between high-speed and conventional lines from the f......
The effect of track alignment irregularity on wheel-rail contact geometry relationship in a turnout zone
Journal of Modern Transportation - Tập 20 - Trang 148-152 - 2013
The irregularity is a key factor affecting the wheel-rail contact geometry relationship. In this paper, we calculated the wheel-rail contact points at typical sections and obtained the longitudinal variation of the wheel-rail geometry relationship with the trace line method. The profile of the key rail sections was matched by cubic spline curve, and the shape interpolation was realized in non-cont......
Xem xét thiết kế của hệ thống vận chuyển ống chân không siêu tốc sử dụng siêu dẫn nhiệt độ cao (Phần I) Dịch bởi AI
Journal of Modern Transportation - Tập 20 - Trang 108-114 - 2013
Hệ thống vận chuyển ống chân không siêu tốc sử dụng siêu dẫn nhiệt độ cao (HTS) là một phương thức vận chuyển đầy hứa hẹn cho tương lai. Là một thành phần chính của phương tiện HTS maglev, các đường dẫn từ tính vĩnh cửu (PMG) với các cấu hình hình học khác nhau và độ rộng của yoke sắt được phân tích bằng phương pháp phần tử hữu hạn (FEM). Lực nâng của một thiết bị HTS maglev trên phương tiện được ......
The electronic structure of Nb3Al/Nb3Sn, a new test case for flat/steep band model of superconductivity
Journal of Modern Transportation - Tập 22 - Trang 183-186 - 2014
In this work, we choose Nb3Al/Nb3Sn as a new test case for flat/steep band model of superconductivity. Based on the density functional theory in the generalized gradient approximation, the electronic structure of Nb3Al/Nb3Sn has been studied. The obtained results agree well with those of the earlier studies and show clearly flat bands around the Fermi level. The steep bands as characterized in thi......
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