Abstract: Several geometric parameters of the locomotive underframes are measured to determine the lateral deviation between the center lines of the car body underframe and the coupler box, and then to reveal the effect of the lateral deviation on the dynamic performance of the heavy haul locomotives under br...
Abstract: In order to choose a proper length of the transition section and minimize negative impacts of the change of rail deflection between the subgrade-tunnel transition section on the track safety and the ride comfort, a vertical coupling dynamic model of CRTS Ⅲ slab track in subgrade-tunnel transition se...
Abstract: To improve the aerodynamic performance of high-speed trains running in open air, an optimization design method of the head shape of high-speed trains was proposed. Taking the aerodynamic drag force of the head car and the aerodynamic lift force of the tail car as the optimization objectives, the aut...
Abstract: A fuzzy-optimal control method was proposed to improve the handling stability of four-wheel independent steering (4WIS) vehicles. Upon completion of the optimal controller designing, the influence of optimal control parameters on control performance and the dynamic characteristic of 4WIS vehicles we...
Abstract: In order to decrease vehicles' fuel consumption rate to the lowest and stabilize the engine running in an optimal rotary speed range, an optimization was made for the traditional clamping force control strategy of the continuously variable transmission (CVT). According to the general structure of th...
Abstract: In order to study the reinforcing mechanism and tension behaviors of the geogrid in pile-supported reinforced embankment under dynamic and static loads, a full-scale model test setup for high-speed railway pile-supported reinforced embankment was built. Eight actors were used to impose loads on the ...
Abstract: As a new type of flexible retaining structures, the geotextile retaining wall built with construction waste uses construction waste and slag as the filler of geotextile bags, which is beneficial to construction recycling. In this work, indoor model tests for geotextile retaining wall was designed an...
Abstract: To determine the optimal parameters of railway wind barriers, the protective effects of wind barriers were optimized by surrogate model methods. Firstly, the grid search method was improved to optimize the parameter of support vector machine regression (SVR) model, and an example was used to validat...
Abstract: To clarify the mechanism of snow drifting and snow deposition caused by skew wind around the ground building, using CFD (Computational Fluid Dynamics) method, the characteristic ambient flows around a cubic building under different wind directions were simulated and indicators for erosion and deposi...
Abstract: To clarify the failure mechanism and mechanical property of coupled concrete-filled steel tubular (CFST) splice joints, static load experiment was conducted on 6 scale models of coupled CFST splice joints. Then, software ABAQUS was used for non-linear finite element analysis. By changing the radius-...
Abstract: A large scale shaking table test of horizontal layered site was conducted, and based on which the seismic response of horizontal layered site was researched in this paper. The research results show that:the seismic wave is amplified when propagating from bottom to top of test model, the amplificatio...
Abstract: To study the great bridge damage caused by rockfall impact, the damage constitutive model of holmquist-johnson-cook was established. The rockfall impact on typical brdiges was analyzed by the non-linear explicit dynamic software LS-DYNA. Then, the rockfall impact energy was graded, and two kinds of ...
Abstract: An MS6.3 earthquake hit the Kangding County, Sichuan Province on November 22, 2014. Three days later, an MS5.8 aftershock occurred. The source rupture properties of two earthquakes were analyzed and the method for rapidly estimating the source rupture direction was investigated using strong-motion r...
Abstract: The process of rockfall impact on reinforced concrete slabs is accompanied by complex energy transformation. The traditional engineering design, which was based on experience or the Hertz contact law, has great deviation with actuality. In order to develop an efficient and accurate calculation metho...
Abstract: To make clear why nearly all large ancient landslides kept stable in Wenchuan earthquake, except for the collapse and deformation of steep slope areas and the boundary of the steep and gentle slope areas, a large ancient landslide was explored, which locates at the left riverbank in front of the dam...
Abstract: The shored mechanically stabilized earth (SMSE) wall system is kind of narrow MSE walls designed and constructed next to the existing stable walls/slopes. However there are lack of in-depth investigations on the mechanism of SMSE walls, especially on the effects of inside terrace and additional offs...
Abstract: Interest point detection is a crucial step for the image matching because it directly influences the matching results. In order to establish the criterion of selecting the interest point detectors for remote sensing image matching, different remote sensing images in terms of spetrum, time and scale ...
Abstract: To reveal the coverage variation in shot peening process for metal structure, a MATLAB program was designed to calculate the coverage by analyzing the modeling process of shot peening random model and target morphology after shot peening. Also, the developed method was compared with the traditional ...
Abstract: In order to design and produce an aero-elastic model that satisfies the dynamic characteristics of MAN type dry gas tanks and the similarity criterion of fluid dynamics, main contributing modes of the wind-induced vibration of the gas tank are identified using the mode energy participation factors o...
Abstract: In order to obtain the dynamic responses on in-plane free vibration of functionally graded material (FGM) rectangular plates, based on the two-dimensional linear elasticity theory, the governing partial differential equations for the in-plane free vibration of FGM rectangular plates were derived. Us...
Abstract: In order to study the influence of flow resistance loss of gas upon the performance of a back-reaming pneumatic impactor, the complex gas path in the working impactor was simplified based on its structure and working principle, and the flow resistance loss of gas during the process was analyzed. The...
Abstract: In order to overcome the fatigue pitting failure of tooth surface of spiral bevel gears for electric multiple unit (EMU) trains, the pitting failure locations were firstly summarized and both macro-and micro-morphologies of the pitting fracture surfaces were investigated. Then, based on the track te...
Abstract: As the qualitative evaluation methods cannot reflect the differences of the same security level in the evaluation of masonry structure safety whereas the quantitative evaluation methods are hard to apply, the analytic hierarchy process and fuzzy theory were applied to the comprehensive assessment of...
Abstract: Micro-expression is a kind of facial expression which is autonomous and cannot be disguised. It has a close relation with credibility. Moreover,it has only a short duration and hard to be recognized. A micro-expression recognition algorithm based on the differential energy maps and centralized Gabor...
Abstract: In order to reveal the generation, propagation and effect mechanism of parameter disturbance in contactless moving power supply system, the generalized state space average modeling method was first used to establish the uncertain model for four basic kinds of bilateral-resonance compensation topolog...
Abstract: In order to improve the real-time performance of system in Internet of Things (IOTs), an intelligent interaction model of IOTs based on context awareness (IITCA) and Storm framework was proposed. In this model, heterogeneous and unstructured data processed in IOTs are abstracted as context, and thre...
Abstract: In order to relieve the parking problem caused by limited parking resources, a shared parking guidance and service process with the participation of residential parking spaces was proposed, which was based on the sharing parking theory and intelligent traffic guidance strategy. First, the basic cond...
Abstract: Considering that an accurate rescue trajectory is hard to obtain in low altitude and crosswind conditions, the data fusion technique was employed to predict the wind condition at low altitude and, accordingly, to amend the low-trajectory rescue trajectory plan for the aircraft. Taking the internatio...