Abstract: Aiming at the errors accumulation of traditional dynamic programming algorithm in energy distribution of the fuel cell hybrid electric system, an energy management method for the fuel cell hybrid electric tram was proposed based on improved dynamic programming algorithm, which aims to further improv...
Abstract: In order to realize the control and operation of the electric-hydrogen hybrid energy storage micro-grid, an all-weather energy management method for the kind of island direct current (DC) micro-grid was proposed. The energy management method based on meeting the power demand of the load and controll...
Abstract: In order to relieve supercapacitor module degradation in trams due to temperatures, the influence of spatial structures on the thermal behavior of the supercapacitor module was studied on the basis of the single unit structure of the supercapacitor. Firstly, the supercapacitor electrochemical-therma...
Abstract: In order to explore the influence of negative sequence from traction loads on electric energy measurement results, the negative-sequence power flow in traction power supply system is analyzed on the basis of the established traction power supply system and three-phase power system models. The shortc...
Abstract: In order to design and select the proper set of test cases so that all the known faults can be covered, an automatic test suite generation method was proposed for the Chinese train control system level 3 (CTCS-3) based on timed automata with input and output (TAIO) and mutation analysis. Firstly, ac...
Abstract: Focusing on the problem of train energy-efficient operation between multi-sections in urban rail transit, a two-stage optimization method was proposed by integrating the processes of energy-efficient driving optimization and timetable optimization. To obtain the optimum train driving strategy betwee...
Abstract: In order to globally optimize crew members in commonly used fixed shift system, an integrated optimum scheduling that combines crew scheduling and rostering is proposed with the constraints of shift proportions and candidate shifts. Then, an improved column generation approach is developed for the p...
Abstract: Aiming at improving the overall efficiency of the multi-node, multi-level, and multi-functional supply chain management, a secondary distribution network composed of a single supplier, multiple distribution centers, and multiple retail stores for a chain supermarket wasexplored to establish the mult...
Abstract: In order to reduce the construction cost of logistics network and make full use of logistics resources, the collaborative construction for hub-and-spoke networks is proposed. We designed the simultaneous construction of two hub-and-spoke logistics networks, in which one hub-and-spoke network selects...
Abstract: International famous fashion brands usually attract and cultivate many loyal customers with their high quality and unique cultural value. Thus, domestic follower brands have to be confronted with the effect of customer stickiness and strategic behavior. How to break through the existing barriers and...
Abstract: To explore the relationship between the variation of ship speed vector and the effect of collision avoidance, the static collision avoidance mechanism with the combination of ship domain and velocity obstacle methods was analyzed. Ship speed vector range for the avoidance of all objects without cons...
Abstract: Currently wind-sand tunnels are mainly used for research, protection and management of wind-sand landscape and wind-sand environment, and rarely adopted in structural wind engineering because the stable sections with adjustable wind speeds and wind-sand concentrations at a certain height are difficu...
Abstract: Curved toppling deformation is essentially the rock rheological deformation. In order to clarify its time-dependent characteristics and mechanical properties, the force analysis of anti-dip stratified slope is conducted, in which the force at a certain point of the rock layer is simplified as the gr...
Abstract: To investigate the seismic performance of earthquake-damaged non-ductile reinforced concrete (RC) frames retrofitted with carbon fiber reinforced polymer (CFRP), two pseudo-static tests were conducted on a 1/2 scale two-span and two-story specimen before and after its CFRP reinforcement. After the R...
Abstract: A finite element analysis based on test results was carried out to study axial compressive performances of the prefabricated circular steel tube confined concrete columns connected with steel sleeve and straight thread sleeve. First, finite element models of cast-in-situ and prefabricated circular s...
Abstract: In traditional pushover analysis, solving nonlinear deformation need to update and decompose global stiffness matrix in real time, which costs many computing resources. The static pushover analysis for nonlinear fiber beam element is conducted on the basis of the force analogy method (FAM). Firstly,...
Abstract: In order to study the longitudinal stress and deformation characteristics and their influences on track and bridge structure under the fracture condition of CRTSⅡ track slab, a spatial coupling model based on the finite element method and bridge-slab-rail interaction mechanism was established. This ...
Abstract: In order to explore the engineering characteristics and road performance of cement-stabilized expansive soil filler when it used as the subgrade filler of heavy haul railways, the dynamic triaxial tests, micro-structure tests and in-situ dynamic tests of subgrade were combined to reveal the variatio...
Abstract: In order to study how the mechanical properties of tailing soil evolve during the freezing-thawing process in open environment, a series of triaxial consolidated undrained (CU) shear tests were carried out with different numbers of freezing-thawing cycles and confining pressures. In the tests, 0, 1,...
Abstract: To overcome the shortcomings of the conventional calculation method of the ultimate soil resistance beneath the cutting curb, a theoretical solution for the ultimate soil resistance beneath the cutting curb is proposed based on the theory of cylindrical cavity expansion considering dilation effects....
Abstract: In order to study vibration and noise problems of the integrated transportation hub under train load excitations, a field experiment was carried out taking the Shapingba station of Chengdu–Chongqing high-speed railway as the engineering background. The vibration accelerations were measured in the st...
Abstract: In order to study the mechanical and deformation properties of the new prefabricated subway station, took the first prefabricated subway station in Changchun as the background, based on the large-scale general finite element software ABAQUS, the force transfer and deformation mechanism of the single...
Abstract: The propagation effect of passive flexible protective system under rockfall impact has an important influence on the energy consumption efficiency of the system, a full-scaled impact test, in which the test model had 3 spans in length, was conducted under a kinetic energy of 1 500 kJ. Based on LS-DY...
Abstract: In order to explore the mechanical characteristics of track structure under strong cross wind, the co-simulation of CFD and FEM is used to analyze the force and deformation of track structure. Firstly, SOLIDWORKS is used to establish a model based on the CRH380A high-speed train. Then, the aerodynam...
Abstract: Existing escape path planning methods for indoor fire in virtual reality (VR) have some deficiencies such as static planning and low efficiency. To solve the these problems, the dynamic planning of indoor-fire escape path was explored with the use of the navigation grid in VR scene. First, a photore...
Abstract: As smoke images are ambiguous, and the background is complex and variable, it is difficult to capture the effective features, resulting in high false positive rates and false negative rates. In addition, the deep convolutional neural network has a complicated structure and many parameters, and it is...
Abstract: In order to study the influence of structural parameters of non-coaxial expansion chambers on the accuracy of the one-dimensional (1D) analytical method within cut-off frequency, the validity of the method for two types of inlet/outlet expansion chamber is analyzed on the basis of the higher-order e...
Abstract: Rigid body assumptions were usually used as the premise for assembly accuracy analysis during the product design stage, and the effects of load factors such as external loads and temperature changes were often ignored. In the case of manufacturing errors and assembly errors, the deformation of the p...