Publications
Application of Femtosecond Laser Processing Method in the Sustainable Conservation of Stone Cultural Relics: An Example of Green Schist in Wudang Mountain, China
Researchers achieved significant breakthroughs in the sustainable conservation of stone cultural relics using femtosecond laser processing. By creating hierarchical micro-nano structures on green schist, a key material in Wudang Mountain's ancient building complex, they successfully modulated its wettability to achieve a water contact angle of up to 147°. This was accomplished by preparing grooves with an optimal spacing of 400 μm using femtosecond laser irradiation (238 fs, 100 kHz, 40 μJ, 33 μm, 500–40,000 pulses). The study systematically investigated the processing mechanism and performance, revealing that different compositions—quartz, chlorite, and muscovite—exhibit distinct responses to laser irradiation. These findings provide a novel approach for the sustainable conservation of ancient buildings and cultural relics, addressing challenges posed by environmental factors such as rain.
Multi‐analytical Studies of Archaeological Chinese Earthen Plasters: The Inner Wall of the Longhu Hall (Yuzhen Palace, Ancient Building Complex, Wudang Mountains, China)
A multi-analytical study of the earthen plasters from the Longhu Hall (Yuzhen Palace, Wudang Mountains) reveals sophisticated construction techniques used during the Ming Dynasty. The research identified two distinct earthen plaster layers with a whitewash finish coating, applied over a thin intermediate layer to enhance adhesion. Ramie and straw fibers were incorporated into the plasters to mitigate shrinkage and cracking during drying. The analysis, combining optical and electron microscopy, X-ray and vibrational spectromicroscopies, and thermogravimetry, indicates a well-established construction industry that integrated traditional earthen building materials with advanced lime technology. This finding underscores the ingenuity of ancient Chinese builders in adapting materials and techniques to ensure structural durability.
Fine Surveying and 3D Modeling Approach for Wooden Ancient Architecture via Multiple Laser Scanner Integration
A groundbreaking approach using multiple terrestrial laser scanners (TLS) achieves unprecedented accuracy—within 3 mm—in surveying and 3D modeling of ancient wooden architecture, even in challenging, steep terrains like the Wudang Mountains. This method overcomes traditional limitations such as mutual sheltering and scanning view restrictions by integrating three-level TLS with scalable measurement capabilities. The study introduces a multi-scale data fusion technique for precise registration and filtering of complex architectural structures, enabling the generation of detailed drawings (plans, facades, sections) and 3D models. These advancements facilitate deformation analysis and digital preservation, setting a new standard for high-precision documentation of heritage sites.
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