Abstract: To solve the identification problem of time-domain nonlinear damage, the incorporation of an autoregressive conditional heteroskedasticity (ARCH) model with damage detection was proposed. First, the basic theory of ARCH model was described, and the order estimation and maximum likelihood parameter e...
Abstract: How to quickly and accurately find the superior information to meet the needs of disaster assessment tasks in massive spatio-temporal big data of landslide hazards is the key basis for comprehensive disaster reduction and disaster relief. The traditional disaster data retrieval is mainly based on th...
Abstract: In order to overcome limitations of the traditional generalized yield function (GYF), a homogeneous generalized yield function (HGYF) is proposed for box sections, which is insensitive to sectional geometry of box sections and applicable for plane and spatial frame structures; and a linear-elastic i...
Abstract: Aiming at the safety problem of hidden resources mining in collapse area of underground metal mines, the discontinuous deformation analysis (DDA) is used to address the deformation response of hidden resources in collapse area under blasting dynamic load. The calculation process of DDA method is sta...
Abstract: In order to study the influence of walking crowd synergy on the human-induced vibration of structures, the vertical vibration of a footbridge under the action of walking crowd was analyzed using the random walking crowd model considering pedestrian synchronization rate. Firstly, a random walking cro...
Abstract: In order to investigate the fluid-structure coupled vibration problems of functionally graded material (FGM) fluid conveying pipes embedded in elastic matrix. Firstly, the vibration control equation of the FGM pipe was derived according to Euler-beam model theory. Then, the differential quadrature m...
Abstract: In order to study the characteristics and evolution process of soil arching effect behind a circular pile, an experimental study on pile-soil interaction based on the transparent soil technology was carried out from a microscopic perspective. Firstly, the tests as to transparent soil ratio were carr...
Abstract: In order to solve the accuracy problems in the crack detection of 3D asphalt pavement, which are mainly caused by low contrast between cracks and the surrounding area and complex pavement textures, a three-step preprocessing was conducted on original 3D images firstly, including size reducing, inten...
Abstract: To overcome the defaults of difficult to adjust the height in existing steel supports, an adjustable height support was proposed, whose height could be adjusted in a range, to adapt to the complexity and variability of the site construction conditions, ensure the precision bearing, and improve the w...
Abstract: At present the surrounding rock pressure of shallow-buried and unsymmetrical loading tunnels is generally calculated by code for design of road tunnel. However, when the two portal parts of twin tunnels are not located at the same mileage, one of them will be constructed adjacent to the excavated su...
Abstract: The foundation construction of a sea-crossing bridge may encounter complex sea conditions, such as deep-water, large-wave and rapid-flow conditions. Wave-current forces may even become dominant loads for the cofferdam construction of a sea-crossing bridge. To study wave-current forces acting on coff...
Abstract: The application of contactless power transfer technology in urban rail transit has attracted more and more attention. However, there are still many problems to be addressed in the practical application of high-power contactless network power supply technology, among which the eddy current heating pr...
Abstract: The increase of moisture content in power transformer will seriously affect the insulation performance of oil-paper, more easily resulting in the surface discharge fault of insulated pressboard. In order to study the discharge characteristics of insulated pressboard with different moisture contents ...
Abstract: The risk of transmission tower collapse can be effectively controlled by improving the bearing capacity of its local stability. Through the test of six-angle parallel reinforcement under axial compression, a single-angle axial compression test and the analysis of 13 finite element models, the load-d...
Abstract: Special load is connected to the distribution network, which enhances the interaction between the power supply, load and power grid, and imposes higher requirements for fault location. To deal with this, a hierarchical location method for fast locating fault points is proposed. Firstly, the incomple...
Abstract: Hyperspectral images possess merging properties of image and spectrum, wide spectral range, and high spectral resolution, which can finely reflect the material microscopic characteristics. To this end, hyperspectral imaging technology is introduced to research the insulator pollution degree in a non...
Abstract: Simplifications are indispensable steps of first-order theorem proving, which can enhance the proving efficiency of first-order theorem provers. Set implication modulo resolution, a principle of identifying the redundancy property of clauses, is proposed. The soundness of this principle in first-ord...
Abstract: When applying t-way combinatorial test sequence generation to a railway signaling system with large-scale inputs, test redundancy occurs, which causes high execution cost. Thus, a t-way combinatorial test sequence set reduction approach is proposed based on the greedy particle swarm optimization alg...
Abstract: The hybrid power system configuration in fuel-cell trams greatly affects the vehicle dynamic performance, system efficiency and economic benefit. However, there is a lack of effective configuration optimization methods. To meet the objective of minimizing the cost in a vehicle service cycle, an opti...
Abstract: In order to solve the problems in pallet allocation of intermodal transportation network (ITN) over a pallet pool, by the use of non-linear programming, mixed-integer programming, and modified particle swarm optimization (PSO), the pallet allocation system were optimized in the cases of three availa...
Abstract: The slippery surface of asphalt pavement is one of the leading major causes of traffic accidents. The mean texture depth (MTD) reflects the performance of skid resistance using a static texture of the pavement, while the friction coefficient reflects it through dynamic friction motion. Aimed to elim...
Abstract: In order to obtain the material proportions that can simulate the sandy layer in the deep sea of Qiongzhou Strait, using on the orthogonal experiment method, the physical and mechanical parameters of different material proportions were analyzed with four control factors of barite powder/standard san...
Abstract: In order to deal with water pollution caused by atrazine (ATZ), the effects, mechanism, kinetics and pathway of ATZ degradation by ultraviolet/peroxodisulfate (UV/PS) were explored in terms of pH, UV intensity, PS concentration and temperature. The analysis of degradation mechanism indicates that UV...
Abstract: Two groups of Tibetan rubble stone walls, each with four pieces, were tested under compressive loading and low cyclic loading, respectively, in order to study the mechanical performance of the walls retrofitted with basalt fiber reinforced polymer (BFRP) grids. These tests focus on the mechanical be...
Abstract: In order to study the formation mechanism and countermeasures of the rail corrugation on a tight curved track with vanguard fasteners. First, a self-excited vibration finite element model consisted of the leading wheelset and the track system was established based on the viewpoint of friction-induce...
Abstract: To study the correlation between the foreign object damage (FOD) and the fatigue strengh of alloy steel 25CrMo4, the simulated test for FOD of high speed railway axle steel specimens was carried out by a compressed-gas gun device. Firstly, the FOD defects were simulated on railway axle steel specime...
Abstract: The wind load is an important load during the gantry crane operation, and the crane box girder is the major windshield component . Therefore the wind load reduction design for the crane box girder can decrease the crane energy consumption effectively. The bionic design method for the crane box girde...
Abstract: As the penalty parameter in the variational mode decomposition (VMD) affects the decomposition performance, a penalty parameter selection method is proposed on the basis of data driven. The method firstly determines the penalty parameter at the main peak by using the Fourier transform. Then the mode...