Zhaohui Liu

Mar 8, 2025 | nature.com | Qingdong Wu |Jijun Miao |Zhaohui Liu |Yihao Liu |Fuhao Li

To address the problem present in current subgrade settlement detection methods, this paper proposes a nondestructive intelligent and dynamic detection method for subgrade settlement based on vehicle-mounted binocular stereo vision technology. This method aims to achieve all season, the whole road, long-term detection of subgrade settlement for Road of ART (Autonomous rail Rapid Transit) in coastal tidal flat areas. Firstly, improved Schneider encoding is adopted as the marker for subgrade settlement monitoring points. Binocular camera calibration and stereo rectification are performed using Zhang’s method and the Bouguet algorithm before acquiring the marker images at the monitoring points, followed by efficient capture of Schneider ring coding images by the vehicle-mounted binocular stereo vision system. Thirdly, OpenCV is employed to preprocess the images, which improve image quality, eliminate noise, and enhance the features of the ring coding markers. On this basis, an improved SGBM algorithm is utilized for binocular stereo matching. Finally, according to the principle of triangulation, the three-dimensional coordinates of the monitoring points are obtained, and the corresponding settlement values of each monitoring point are determined through decoding and matching. Experimental results indicate that, for a true settlement value of 60 mm, the proposed detection method achieves an average settlement value of 58.897 mm, with a relative error rate of 1.84%. In the same experimental environment, the relative error rate of using a monocular camera detection method is 10.3%. The vehicle-mounted binocular camera method, with lower relative error than the monocular camera, offers a more efficient and accurate solution for nondestructive subgrade settlement detection, enhancing its intelligence.

Nov 27, 2024 | mdpi.com | Zhaohui Liu |Zebin Liu |You Huang |Yue Cao

1. IntroductionIn recent years, the continuous increase in highway traffic volume and heavy vehicles in China has exacerbated the diseases of asphalt pavements, reducing driving comfort and safety [1]. Rutting is one of the main forms of diseases on asphalt pavements. Improving the viscosity of asphalt materials by adding anti-rutting agent, thereby improving the high-temperature stability of asphalt mixtures, is one of the main ways to optimize asphalt pavement materials.

Jan 14, 2024 | biorxiv.org | Jatinder Singh |Peter Maughan |Zhaohui Liu |Santosh Gudi

AbstractAegilops spp. serve as an important reservoir for novel sources of resistance or tolerance to biotic and abiotic stresses. To harness this reservoir, we have generated a high-quality chromosome-level genome assembly of an Ae. umbellulata accession PI 554389 using a combination of PacBio HiFi, Oxford nanopore, and chromosome conformation capture (Hi-C) sequencing technologies and resequenced 20 Ae. umbellulata genomes using Illumina sequencing.

Sep 5, 2023 | opg.optica.org | Yaru Li |Zhaohui Liu |Liang Zhou

Space target imaging simulation holds great significance for the development of space-based imaging systems and the prediction of imaging tasks. Currently, commonly used rendering algorithms in space target imaging simulation suffer from issues such as radiance calculation results lacking actual physical significance and rendered images containing high-frequency noise.