Abstract: The hot spot stress method was applied to fatigue assessment to solve the problem of fatigue cracking in orthotropic steel bridge deck.In this method, the hot spot stresses at check positions were calculated using the linear extrapolation method of International Institute of Welding and the ANSYS su...
Abstract: In order to investigate the mechanic behavior of steel-concrete composite girder in long-span cable-stayed bridge, finite element method (FEM) analysis and specimen test of Guanyinyan Yangtze River bridge were carried out. By using FEM program ANSYS, a 3D model for girder section was founded, and el...
Abstract: In order to research on structure-borne noise of box-girder and its influence factors, a simply-supported concrete box-girder with a span of 32 m was selected as the case study, its structure-borne noise was simulated by means of hybrid FEM-BEM method, and the computed results were validated by fiel...
Abstract: In order to study the landslide mechanisms and responses of a high steep hill with two-side slopes under ground shaking, a high steep hill with two-side slopes near national highway 213 was used as a prototype. A full process from initial deformation to sliding of the slope during ground shaking was...
Abstract: Plane strain centrifuge model tests were carried out to investigate the influence of small duct grouting range on tunnel stability and ground subsidence. The consolidation principle and performance optimization of advanced duct grouting were discussed. The tests were carried out in a circular cavity...
Abstract: In order to discuss the calculating method of diffusion radius and pressure on segments of backfill grouting, a mechanical model for penetration diffusion in surrounding soils was set up by simplifying grouting penetration as transfusion in soil capillary tubes with uneven bore diameters. Based on t...
Abstract: To investigate the detection standard of electromagnetic wave CT of karst roadbed grouting, 64 sections in the karst roadbed test areas of Nanning-Guangzhou railway were tested using the electromagnetic wave CT, the differences of electromagnetic wave absorption coefficients before and after groutin...
Abstract: In order to improve the accuracy of persistent scatterer interferometric (PSI) synthetic aperture radar for monitoring ground deformation, an improved interferometric combination mode was proposed by considering the thresholds of both spatial and temporal baselines, and taking into account the noise...
Abstract: In order to compare the short arc integral approach with the average acceleration approach, two Fortran programs were compiled respectively. Two 90 degrees and orders gravity field models, Model_Arc (for the short arc integral approach) and Model_Acc (for the average acceleration approach), were rec...
Abstract: The current secure digital camera (SDC) model can not identify the secondary capture image and have to validate the integrity of watermarked images taken by it. To address these problems, a state parameter based SDC model is proposed by generating and transferring secret key which is used to produce...
Abstract: The microwave nondestructive testing on dielectric constant of material needs several times to tune cavity system, which leads to low efficiency and high cost. Based on the cavity perturbation theory, an electromagnetic separation test system was designed, in which the TE10p (p is the odd number) os...
Abstract: As IFDL(intra flight data link) is required to support heterogeneous operations and the transmission of large amounts of battlefield information, it is necessary to perform joint control over different transmission rates and powers for each node. To fulfill this purpose, an algorithm based on dynami...
Abstract: As the effective singular value is hard to determine in the singular value decomposition-QR (SVD-QR), QR decomposition with column pivoting (pivoted-QR) was proposed to analyze the fuzzy model structure. By applying it to the two firing strength matrices of the fuzzy model, the absolute values of R-...
Abstract: Classical single-load bi-directional inductive power transfer systems have some drawbacks such as low resonant capacity and high voltage and current stress of switching devices. Based on LCL composite resonance, a bi-directional power energy transfer mode using symmetric topology was proposed. The i...
Abstract: In order to ensure the safety and reliability of the series 5,6 and 7 aluminum alloy components of high-speed trains, specimens were tested using constant loading technique and constant displacement technique for the stress corrosion cracking. Mechanical incisions and fatigue cracks were prefabricat...
Abstract: In order to study the effect of vehicle impacts on vehicle safety, a modified draft gear dynamic model was built in Simulink based on theory of draft gear, and a full degree-of-freedom (DOF) model of C80 freight car and K6 bogie were built in UM based on the vehicle system dynamics and a coupler mod...
Abstract: In order to reconstruct three-dimensional vehicle collision accidents, the critical conditions of vehicle pitching and rolling were derived in the vehicle's three-dimensional coordinate system by analyzing the relationship between collision impulse moment and inverse gravity moment. The movement tra...
Abstract: In order to analyze the contributing factors of express-delivery price, the research attempts to evaluate the express-delivery operation procedures based on the union's express-delivery organization plan, consumer behaviors, behaviors of related transport enterprises as well as the equilibrium condi...
Abstract: In order to analyze the variation of urban rail transit (URT) passenger flow against the distance from the city center, a model characterizing the passenger spatial distribution of urban rail system was proposed, which was based on the deterioration model of pavement performance. The model was verif...
Abstract: In order to improve the precision of calculation of bus stop capacity, the servicing process of buses at on-line stops was analyzed using the bus trajectories according to metropolitan bus operation status. On this basis, a method for computing on-line bus stop capacity was developed taking into acc...
Abstract: To improve the integrated evaluation on the operation performance of air traffic control, a general index system was established, including density of air traffic flow, safety performance, efficiency performance and workload of air traffic controller, and a classification evaluation method by means ...
Abstract: In order to determine the specific locations of hubs and optimize the path design of origin-destination (OD) flows of airline network, an interval scenario set was defined and a new absolute interval robust optimization model was established, taking into account the uncertainty of design parameters ...
Abstract: For the precision guidance of aircraft movement under the control of the advanced surface movement guidance and control system (A-SMGCS), airport surface was divided into typical operation units, such as taxiway intersection and line segment. A modular surface operation model was built based on the ...
Abstract: Variations of the features of leachate and components of landfill at different temperatures were simulated experimentally to study the effect of temperature on the stabilizing process of aerobic bioreactor landfill.The results indicated that the concentration of chemical oxygen demand (COD) and ammo...
Abstract: In order to deeply probe into influences of gravel content and distribution on bearing capacity and differential settlement, 18 plate loading tests were carried out on 3 dynamic compaction foundations with different gravel contents. The research result shows that the dynamic compaction foundation of...
Abstract: In order to control a crane motor to real-time track the abrupt load torque with a given rotational speed for the motor driving system, the equivalent moment of inertia and equivalent load torque on the rotor of the hoisting mechanism and the dynamic equation of the motor driving system were derived...
Abstract: In order to analyze the impact of urban rail transit on the travel mode choice of conventional bus passengers, an algorithm for origin-destination matrix estimation of conventional bus passenger flow under the impact of urban rail transit was developed in MATLAB by using Dijkstra's algorithm to calc...
Abstract: In order to reduce the rate of accidents of novice drivers, a hazard perception and rating test was designed using a driving simulator by the fuzzy signal detection theory. Through the test, causes of difference between experienced and novice drivers in hazard perception performance were analyzed. T...
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