China Academy of Railway Sciences

Condition identification and vibration response of high-speed railway catenary steady arms under abnormal service conditions

Abnormal wear of catenary steady arms represents a typical concealed defect that threatens the safe operation of high-speed railway pantograph-catenary systems. The essence of this defect lies in the cumulative abnormal vibration and progressive contact damage induced by service...

Robust Adaptive Nonlinear MPC for Dynamic Tracking of Heavy-Haul Virtually Coupled Trains

Virtual coupling (VC) enhances heavy-haul railway capacity, yet existing point-mass controllers with fixed safety margins inadequately address internal longitudinal dynamics and fault-induced degradation of safety protection. This study proposes a robust adaptive nonlinear model...

Few-Shot Remote Sensing Scene Classification Leveraging Collaboration of Foundation Models

Foundation models have shown remarkable generalization ability for few-shot learning (FSL). However, their potential for remote sensing scene classification has not been fully explored. Existing methods mainly adapt a single vision–language model and seldom exploit the complement...

A Cross-Modal Consistency and Reliability-Aware Fusion Network for Railway Foreign-Object Segmentation

Real-time segmentation of foreign objects between rails is essential for high-speed railway inspection. Single-modality perception remains limited because two-dimensional images provide rich texture but lack depth, whereas point clouds provide geometry but are weak in color and m...

In Situ Gas Content Prediction of Deep Coal Seams Based on Logging in the Central Linxing–Shenfu Block

Abstract Deep coalbed methane, a key strategic resource for unconventional natural gas supply, is abundant in the Ordos Basin, China. However, limited systematic research on the state of gas occurrence and critical depth, combined with sparse gas content and in situ stress measur...

Soil Conservation Through Agricultural Waste Recycling: Synergistic Control of Desiccation Cracking in Expansive Soils

Desiccation cracking in expansive soils on slopes accelerates soil erosion and reduces water retention capacity, posing significant threats to agricultural sustainability. This study investigates the combined effects of organic fertilizer (OF), slow-release fertilizer (SRF), and...

Integrated Freight Train Rescheduling and Dynamic Railcar Flow Rerouting Under Unexpected Events

Railroad daily operations can be significantly disrupted by unforeseen events such as adverse weather conditions and train accidents. These events often result in delays in delivering shipments on time. Therefore, studying how to reschedule freight trains during emergencies is es...

Rail Light-Strip Abnormality Analysis from Color Inspection Images Using an Improved SegFormer and Geometric Rules

Rail light-strip morphology reflects the wheel-rail contact condition. Reliable automatic analysis remains difficult. The strip is narrow and has weak boundaries, while specular reflection, rail-head texture and trackside background interfere with color inspection images. This st...

Seasonally Adaptive Natural Ventilation for Sustainable and Energy-Efficient Large-Space Railway Stations in Hot-Summer and Cold-Winter Regions: A Case Study of Chengdu Station

The rapid expansion of high-speed railway networks has increased the operational energy demand and indoor overheating risk of large-scale, high-volume railway station buildings. Natural ventilation is a climate-responsive passive strategy that can improve indoor environmental qua...

Multi-Axle Reference and Temporal-Consistency Deep SVDD for EMU Traction Motor Bearing Anomaly Detection Using Field Vibration Data

Field vibration monitoring of EMU traction motor bearings is commonly constrained by weak or relative labels, fluctuations in operating conditions, and limited abnormal samples. Under these conditions, learning a normal boundary from a single bearing position may be unstable, and...