Ziyi Wang

The canyon hilly terrain of northwestern China significantly influences wind field characteristics within the grotto zone, consequently affecting the degree of wind erosion on grotto heritage. In the present study, computational fluid dynamics (CFD) numerical simulations were employed to investigate the effects of mountain length, slope, and spacing on the wind field characteristics of a typically canyon hilly terrain, with the Xumishan Grottoes as a case study. The results show a significant wind speed acceleration at canyon entrances and summits. Variations in mountain length and slope non-linearly affect wind field distribution, with wind speeds at the side and summit stabilizing when the mountain length exceeds three times the mountain height (L ≥ 3H). Based on the simulation results, an improved acceleration ratio formula incorporating mountain length, slope, and spacing was proposed, which demonstrated a discrepancy of only 9.05% compared with the field-validated CFD results for Cave 5 at Xumishan. This study elucidates the wind field formation mechanisms in canyon hilly terrain and provides a scientific basis for addressing the stone carving erosion of grotto heritage, contributing to the advancement of preventive conservation strategies for grottoes in complex terrains.

This paper undertakes a multi-dimensional exploration of the glass imitation jade culture under the context of the ancient Silk Road, tracing the historical trajectory of glass manufacturing technology from West Asia to China, especially after the Han Dynasty, when the flourishing trade along the Silk Road facilitated the integration of foreign glass craftsmanship with China’s indigenous imitation jade tradition. This integration prompted Chinese glass artifacts to not only incorporate foreign techniques but also emphasize the texture and cultural symbolism of jade. Through systematic archaeological excavations and historical text analysis, this study delves into the unique phenomenon of glass imitation jade on the ancient Silk Road in China, providing detailed exposition on the formation, characteristics, and profound impact of this cultural practice. Imitation jade culture extends beyond physical forms, permeating material selection, technological innovation, and cultural symbol inheritance. As a gem of ancient Chinese craft art, the glass imitation jade culture offers valuable insights into understanding the aesthetic features of ancient cultures, cultural exchange patterns, and the evolution of craft technologies. This paper innovatively proposes that ancient glass-making practices imitation jade can serve as a new means to actively protect natural jade resources in modern times, offering a fresh perspective for the exploration and study of the Silk Road cultural heritage.