Abstract: For the hybrid tram power system that consists of two sets of high-power fuel cells, supercapacitors and power batteries, an energy management strategy based on state machine is proposed to meet the requirements of operating conditions. First of all, the state machine is adopted as the basic archite...
Abstract: In order to improve the power density of the in-wheel motor and reduce its material cost, an improved artificial bee colony (IABC) algorithm was proposed to optimize the performance of the in-wheel motor. Firstly, the expressions for the performances of the permanent-magnet in-wheel motor with outer...
Abstract: To gain a better understanding of the influence of the electrode gap on the SDBD (surface dielectric barrier discharge) actuator discharge characteristics, plasma extension, and power consumption were analysed using a camera and oscilloscope under different electrode gaps. Meanwhile, the temperature...
Abstract: Insulator image can be acquired by hyperspectral imaging technology in a non-contact way, and hyperspectral image has some advantages such as the properties of multi-band, and merging image and spectrum. For this reason, the paper proposes a method to predict contamination degree of insulators based...
Abstract: The fatigue performance of rib-to-deck (RD) joints is expected to be enhanced by the application of the orthotropic steel deck (OSD) with thickened edge U-ribs (TEUs). To investigate its actual fatigue performance and the mechanism of enhancement, the RD joints in the OSD with TEUs using the fatigue...
Abstract: In order to study the influence of shear deformation on the bending deformation of composite beams with steel corrugated steel webs, trigonometric series solution was introduced to simulate the deformation of the components (web and flange) of the beam according to the plane-section assumption, and ...
Abstract: To study the lower vertical basic frequency limit of a simply supported box-girder on the Moscow-Kazan high-speed railway line, firstly, the vertical fundamental frequency of the prestressed concrete (PC) simply supported box-girder was calculated with theoretical formula. Then, according to the pri...
Abstract: Simply-supported pre-stressed concrete bridges are widely adopted in urban elevated rail transit systems. The section types of the bridges not only affect bridge vibration and structural acoustic radiation, but also have an indirect influence on the propagation of wheel-rail noise. Thus, this work a...
Abstract: In order to study the vortex-induced vibration (VIV) characteristics and control methods of wide twin-box girder bridges, a long-span suspension bridge with twin-box girder and a total girder width of 64.1 m was modeled in a 1∶70 scale ratio and wind tunnel tests for this model were carried out unde...
Abstract: To study the seismic performance of a concrete-filled steel tubular (CFST) arch bridge under pulse-like ground motions, a comprehensive theoretical analysis is made of an actual CFST arch bridge under the action of non-pulse-like and pulse-like ground motions using time history analysis. The actual ...
Abstract: In order to investigate the wave-induced oscillatory liquefaction in an anisotropic seabed, a two-dimensional numerical model for wave-seabed interactions is proposed. The reynolds-averaged navier-stokes (RANS) equation with the standard k-ε turbulence model was used to describe wave motions, and Bi...
Abstract: In order to reveal the mechanism and spatial distribution characteristics of aerodynamic noise around super high-rise buildings, the flow field around super high-rise buildings in the atmospheric boundary layer is solved by using large eddy simulation (LES), and the sound pressure field is numerical...
Abstract: Xigeda strata are a type of fluvio-lacustrine deposit with half-diagenesis in southwest China, characterized by bad water stability; the deposits become mud and collapse when they come into contact with water; therefore, disasters are possible during the process of tunnel excavation. Large deformati...
Abstract: In order to reveal the depth distribution law of the non-limit passive earth pressure of clay on a rigid retaining wall under different displacement modes, translation and rotation experiments were carried out using the self-made model box. The influence of the three modes and corresponding displace...
Abstract: Mixed soil is widely distributed in the west of Sichuan, and the stability of the highway subgrade made up of mixed soil in mountainous areas is an issue needing urgent attention and research in engineering practices. Considering that mixed soil shear strength is affected greatly by the content of c...
Abstract: The varying humidity of service environment due to the change of weather and climate has a significant influence on the mass and volume of CA (cement and emulsified asphalt) mortar, which further influences the geometrical size of track structure. To understand the effect of the variation of ambient...
Abstract: In order to overcome the errors caused by the subjective and discretionary factors of the recycled aggregate, select their quality scientifically and reasonably, a quality evaluation model for concrete with recycled coarse aggregate was established based on the combined weight-extension theory. Acco...
Abstract: The maximum shear modulus of soil is an important parameter for dynamic design of foundations and response analysis of seismic sites. At present, this parameter is mainly determined through laboratory tests, but such tests cannot represent the real situation in the field. Thus, in situ testing techn...
Abstract: The ring-net is an important interception component in passive flexible protection systems, and it has obvious nonlinear dynamic characteristics. Constructing a mechanical model of the ring network is the key problem in the theoretical study of the flexible protection structure. To propose an equiva...
Abstract: To evaluate the effect of computational grid on the numerical simulation results of train aerodynamics in open air, the uncertainty of the computational grid on train aerodynamic characteristics is studied based on computational fluid dynamics. First, according to the grids of three sizes and the co...
Abstract: In order to solve the problem that quantitative and qualitative indexes are difficult to be unified into comprehensive fuzzy assessment of railway location selection, the theory of interval numbers is introduced to build a fuzzy optimal selection model based on distance measure between interval numb...
Abstract: To ensure regularity of train arrival and departure times at stations operating with strict train periodicity and timing schedules, a novel methodology for coordinated operation of multi-periodic trains is proposed. The proposed method aims to ensure a better fit for the time distribution of passeng...
Abstract: In order to improve the efficiency of import/export container terminals in periodic environment, the periodical and collaborative allocation problem of key resources at container terminals, including berth, yard and gate is investigated. A mixed-integer linear programming model is first established ...
Abstract: In order to deal with the excessive temperature rise and noise of the hydraulic power unit in the lower extremity exoskeleton robot, ANSYS Fluent software was used for the simulation tests of Z-channel and cross-channel, which are the main components of internal flow channel of the hydraulic manifol...
Abstract: To develop a customized computer-aided engineering (CAE) software with specialized features for metal forming, based on the self-developed OmtDesk platform, a numerical algorithm for mental forming calculation is proposed. On the basis of the bipotential theory, the Uzawa algorithm was applied to ad...
Abstract: In order to increase the generality and accuracy of radio modulation recognition in complex radio propagation environment, a multiple feature combined convolutional network system based on deep learning is proposed. Carrier features were detected with front convolutional network in the first stage. ...
Abstract: In order to adapt to the restrain resulting in environment factor of mine to localization of wireless sensor network, a novel localization algorithm based on rigid cluster and chicken swarm optimization (RCCSO) is proposed. First, the clusters are set up centring on the uniformly distributed anchor ...
Abstract: To improve the mechanical strength and water resistance of sodium silicate used for track slab coating in high-speed railways, Ca(H2PO4)2 was added into sodium silicate to promote biomineralization and polymerization of silica gel. First, Sodium silicate modified by Ca(H2PO4)2 was prepared, using so...