Ministry of Transport

A path fitting accuracy improvement and evaluation method based on minimum toll and multi-dimensional anomaly detection engine

<title>Abstract</title> Aiming at the problems of inaccurate path fitting and “same road, different tolls” caused by missing or abnormal gantry data in expressway network tolling, this paper proposes an innovative two-stage path fitting framework. The first stage (baseline fittin...

A Hierarchical Spatiotemporal Index for Bathymetric Data in Approach Channels

Approach channels are affected by sedimentation and scour, resulting in continuous changes in underwater topography. Such processes tend to generate shallow spots and inadequate navigable dimensions, posing safety hazards that undermine both waterway resilience and navigation cap...

Unsteady aerodynamics and underbody flow characteristics of high-speed trains with bogie covers at 400 km/h

Although high-speed train (HST) bogie covers effectively reduce aerodynamic drag, they raise safety concerns due to lift-induced oscillations caused by unsteady underbody flow. This study investigates the effects of various bogie covering structures on aerodynamic load pulsations...

Experimental investigation of the direct shear strength parameters of compacted snow

Abstract. Compacted snow is utilized as a building material in various construction and engineering applications across global high-latitude regions. For the safety assessment of snow and ice structures in cold regions, cohesion and internal friction angle are key shear strength...

Collaborative Optimization of Mechanical and Alkali-Reduction Performance of Ecological Low-Alkali Porous Concrete Based on Alkalinity Gradient Regulation

Abstract Porous concrete (PC) is widely used in slope ecological restoration due to its good permeability and plantability. However, the synergistic evolution mechanism between its mechanical properties and pore alkalinity has not been systematically elucidated, which has become...

A partially supervised joint segmentation method for farmland and rural roads from single-class annotated remote sensing datasets

Accurate segmentation of co-existing land-cover objects in high-resolution remote sensing imagery is essential for precision agriculture and rural planning. Although multi-class datasets are increasingly available, many high-quality annotations remain task-specific, where only a...