In order to minimize energy consumption in rail transit systems, the coordinated power supply technology of “network-source-storage-vehicle” integrates with renewable energy power generation systems along the line. This approach establishes a new coordinated power supply technology system that enabl...

Single-inductor dual-output (SIDO) switching converters with shared charge and discharge sequence have problems of the large inductor current ripple and cross-regulation between output branches, and the control circuit fails to work normally under the wide range of changes in circuit parameters. To ...

For pantograph-catenary contact pairs in electrified railways operating in normal and abnormal states, the friction and wear performance of pantograph strip differentiates in a wear cycle, highlighted by differences in wear rate and wear profile. When abnormal wear occurs, the wear rate of pantograp...

Global blackouts have indicated that vulnerable lines in the power system would bring great operation risk and threaten system security. In view of this, the identification of vulnerable lines in the power system was carried out according to the transfer characteristics of the active power flows in ...

In view of two-hop multi-relay transmission in energy harvesting wireless sensor networks (WSN), a wireless radio frequency power beacon (PB)-assisted energy harvesting relay model based on simultaneous wireless information and power transfer (SWIPT) was constructed. Under the condition that the rel...

The engineering testing of a high-speed railway signaling system (HSRSS) focuses on the complex behavior relationship and state synchronization among various equipment in the system. Since the testing modeling method for engineering testing lacks complex behavior interaction and synchronization mech...

The wheel-rail creep curve influences dynamic wheel-rail interaction, which further affects rail wear. To study the effect of the measured wheel-rail creep curve on rail wear, parameters suitable for the Polach model and modified FASTSIM algorithm were obtained based on the least square method, and ...

During the outbreak of an earthquake, the pier columns in reinforced concrete (RC) structures are usually subjected to horizontal forces and vertical forces under reciprocating loads. When the transverse constraints in the structure are insufficient, the longitudinal reinforcement may have obvious t...

Four-point bending tests were conducted on six ultra-high performance concrete T-shaped (UHPC-T) section beams to establish a reinforcement stress calculation method for reinforced UHPC beams and study the variation law of reinforcement stress. Based on the mechanism of force balance and deformation...

Influenced by rainfall, strong earthquakes, and intensive engineering activities, the slope at the tunnel entrance may experience collapses, landslides, debris flows, and other geological disasters, especially under the complex conditions of violent earthquakes, high geostress, abrupt slopes, and ex...

To elucidate the applicability and feasibility of the calculation methods for impact force and impact depth of falling rocks based on Hertz contact theory, as well as the determination method for the reinforcement coefficient of buffering soil layers, full-scale model tests, inversion analysis, and ...

In order to study the mechanical deformation characteristics of the new horseshoe prefabricated initial support structure and compare its difference with the spray anchor initial support structure, the prototype loading tests of two types of structures were carried out. The structural design, lining...

The hard and brittle surrounding rock in tunnels is prone to rockburst under high ground stress conditions. Currently, the support structure design for rockburst tunnels in China mainly adopts the engineering analogy method. In order to quantify the impact load of the rockburst on the support struct...

In order to systematically investigate the response law of the internal relative humidity of concrete at an early age to different tensile stress levels, a test method of the internal relative humidity of the concrete under constant axial tension was developed in this paper, and the response law of ...

In order to study the effect of fly ash and silica fume contents on the properties of alkali-activated slag-based concrete (AASC), the changes in setting time, cubic compressive strength, cubic splitting tensile strength, flexural strength, and elastic modulus of AASC were investigated by conducting...

Foamed concrete is susceptible to environmental factors such as temperature during the period from pouring to curing and molding, and adverse environmental factors can lead to performance degradation and deterioration of foamed concrete after curing and molding. In order to study the performance and...

In order to study the influences of the number of fiber reinforced polymer (FRP) layers, the type of FRP, and the volume of steel fiber on the axial compression performance of ultra-high performance concrete (UHPC) circular stub columns, 21 FRP-confined UHPC circular stub columns were tested under a...

To explore how sustained loading and drying-wetting cycles of chloride salt affect the flexural behavior of reinforced concrete (RC) beams, the corrosion tests and flexural capacity tests of 19 RC beams were carried out at first. The effects of various sustained loading grades and drying-wetting cyc...

Vehicle trajectory data provides abundant spatial-temporal traffic flow information, which can be used for traffic research. Traditional vehicle trajectory models mostly focus on the artificial driving environment and fail to consider the impact of mixed traffic flows composed of regular vehicles (R...

As a key factor affecting location quality of cellular phone data, location frequency has an important influence on the extraction accuracy of travel mode. In order to quantify the change rule between the location frequency and accuracy of travel mode extraction, a travel mode extraction model based...

To analyze the significant influencing factors of the entrainment coefficient of the ejector, a two-dimensional numerical model of the compressible flow of the ejector with air as the working medium was established, and its calculation accuracy was validated by the experimental data. Meanwhile, the ...

A dense crowd counting network based on multi-scale perception was proposed to solve the problems of diverse target scales and large-scale changes of crowds in dense crowd scenes. Firstly, since the small-scale targets account for a relatively large proportion of the images, a dilated convolution mo...

The existing deep learning methods have low precision and poor generalization ability in calculating dense correspondence between non-rigid point cloud models. To address these issues, a novel method for calculating unsupervised three-dimensional (3D) point cloud model correspondence based on a feat...

To address challenges of unclear correlation, intricate knowledge retrieval, and difficult knowledge application across diverse domains of high-speed trains, the organizational structure involving multi-source heterogeneous knowledge pertaining to high-speed trains was first analyzed, and a knowledg...

Some image fusion methods do not fully consider the illumination conditions in the image environment, resulting in insufficient brightness of infrared targets and overall low brightness of the image in the fused image, thereby affecting the clarity of texture details. To address these issues, an inf...

Aiming at the poor interpretability of modulation recognition methods based on time-frequency deep learning, an interpretable framework of a modulation recognition network is proposed, utilizing time-frequency gradient-weighted class activation mapping (Grad-CAM). Through the key features of the hid...

To address the challenges of identifying and annotating built-up areas in synthetic aperture radar (SAR) images, a novel semi-supervised method for extracting built-up areas that combined improved pseudo-labeling techniques with an edge enhancement strategy was proposed. Initially, SAR images from t...

Accurate prediction of microscopic traffic parameters in atypical complex scenes is a prerequisite to ensure stable operation of the intelligent vehicle infrastructure cooperative systems (IVICS). To solve the problem of vehicle speed distribution disorder and difficulty in prediction caused by bott...