A novel crossing power governance approach was proposed to mitigate the effects of crossing power in the traction power supply system while taking regenerative braking energy utilization into account. First, the power flow under different operating conditions was derived based on the structure of th...

With the rapid development of suburban railways and oil and gas pipelines, parallel laying or cross-laying is inevitable for suburban railways and buried pipelines. In order to assess the impact of the traction power supply system of suburban railways on the safe operation of oil and gas pipelines, ...

In order to improve the energy utilization of photovoltaic (PV) power generation under partial shading conditions (PSCs), an improved and fast global maximum power point tracking (GMPPT) algorithm was proposed. Firstly, the output characteristics of PV array under PSCs were researched, and the outpu...

In order to determine the thermal aging characteristics of the vehicle-mounted cable terminal stress control tube and its influence on the insulation performance of cable terminal under thermal aging conditions, firstly, the macro-dielectric characteristics and micro-aging law of vehicle-mounted cab...

Converting alternating current (AC) cables into direct current (DC) operation is of great significance to achieve new energy generation connected to the grid and increase power supply capacity. A 35 kV AC cross-linked polyethylene (XLPE) cable was taken as the research object, and temperature field ...

In infrared low-light scenes, railway object intrusion detection faces low detection accuracy, and it is difficult to achieve lightweight real-time detection. Therefore, a lightweight detection method of railway object intrusion based on convolutional block attention module (CBAM) enhancement was pr...

In order to study the influence of surface ultrasonic rolling processing (SURP) on the fatigue properties of EA4T axle steel, the EA4T axle steel specimens were firstly treated by SURP technology, and the surface properties of the treated specimens were analyzed. The 3D surface morphologies, roughne...

In the linear displacement measurement, the printed circuit board (PCB)-based new inductive displacement sensors is easy to lead to short-period errors in manufacturing, assembly, and other process links because of its large pitch. Among the types of short-period errors caused, the first-order and f...

The development of urban rail transit plays an important role in alleviating urban traffic congestion, and its regenerative braking energy utilization technology has attracted much attention. At present, the inverter regenerative braking energy utilization technology includes the topology structure ...

The characteristic value of train wheelsets is closely related to the speed, and the quantitative analysis of wheelset faults requires signals with a certain length collected at a certain speed. However, such a signal is difficult to be obtained by the system working in the variable speed condition....

Wheel polygonal wear will deteriorate the vibration environment of rail vehicles, lead to resonance fatigue failure of structural components, and seriously threaten driving safety. To study the formation mechanism of wheel polygonal wear of metro vehicles, the dynamic line tracking test was carried ...

The departure tracking interval is one of the main bottlenecks that limit the 3-minute tracking operation of trains, and compressing the departure tracking interval can effectively improve line capacity. The departure tracking process of high-speed trains was first analyzed, and a pre-departure annu...

The periodic change of intersection signals in urban road systems leads to the uncertain delay of vehicle travel. In order to reduce the delays of vehicles at signal-controlled intersections, an improved hyperpath searching algorithm was proposed with the minimization of travel time on the road segm...

In order to determine the influence range of non-point source traffic congestion and identify key road sections, the risk field strength theory and the regional growth method were introduced to improve the plume model. The maximum and core influence ranges were determined, and key road sections were...

In order to study the energy distribution inside the high-speed solenoid valve and the coupling relationship between the energy parameters and the dynamic response, the performance of the high-speed solenoid valve was optimized. Firstly, the dynamic model of the high-speed solenoid valve was establi...

In order to solve the problem of ground screw connection under large load of transmission angle steel tower, an embedded twelve ground screw joint structure was proposed. Based on the plastic yield line theory of stiffness difference evolution, the influence of the position of ground screws and the ...

The increasing speed of high-speed trains makes the dynamic problem of sound barriers prominent. In this study, the dynamic amplification factor of vertical sound barriers caused by high-speed trains was taken as the research object to explore the vibration characteristics and influencing parameters...

The curve of the transition section of the terrain model at bridge sites in complex mountainous areas directly affects the accuracy of the wind tunnel experiment or numerical simulation results. To study the ideal form of line shape used in the boundary transition section of the terrain model at the...

In order to reveal the influence of the bending space effect on natural vibration frequency weakening, the additional deflection caused by the shear lag effect was selected as the generalized displacement, and the warping additional deformation of box girder was incorporated into the total kinetic e...

To ensure the construction safety of the complex spatial grid structure, the optimization analysis and monitoring of the construction process were carried out. An open single-layer spherical reticulated shell structure with a large rise-to-span ratio was taken as an example, and the construction pro...

The dam foundation leakage problem has been a key factor affecting the overall safety of reservoir dams. To effectively and accurately detect dam foundation leakage, the magnetoelectric method based on M sequence correlation identification technology was applied to the dam leakage detection based on...

New geological phenomena have been found in the structural geological mapping of Niba Mountain tunnel field of Ya’an to Xichang section of Beijing−Kunming Expressway. To demonstrate the nature of the Niba Mountain fault zone and new tectonic phenomena of regional geological tectonic significance, us...

Grout penetration in the unsaturated formation is a complex multiphysics process. In order to analyze more accurately the penetration characteristics of grout in saturated and unsaturated formations and estimate the range of grout penetration and grout compaction area, a multiphysics coupling model ...

In order to investigate the influence of the drainage boundary, which can better reflect the actual permeability, on the land subsidence caused by over-exploitation of groundwater, firstly, a one-dimensional consolidation model of aquitard caused by the dropping of groundwater table in phreatic aqui...

In order to explore the variation of settlement and stress of the karst cave backfill and natural accumulation layer at different depths, a giant karst cave backfill project in the Yujingshan tunnel of Chengdu—Guiyang railway was studied. A 1∶100 laboratory centrifugal model test was carried out to ...

To improve the economic benefits of engineered cementitious composite (ECC) and control the repair cycle, the polypropylene fiber-sulfoaluminate cement-based (PP-SACC) repair materials were designed with polypropylene fiber featuring low cost and sulfoaluminate cement featuring fast hardening and ea...