This paper presents a new approach for roof facet segmentation based on ridge detection and hierarchical decomposition along ridges. The proposed approach exploits the fact that every roof can be composed of a set of gabled roofs and single facets which are separated by the gabled roofs. In this work, firstly, building footprints stored in OpenStreetMap are used to extract 3D points on roofs. T...

After deep mining, the discontinuous deformation characteristics of roadway roofs become more and obvious, resulting in emergence separation fractures rock mass, which seriously affects stability roof mass. By taking air return 21204 (ARR 21204) Hulusu Coal Mine as engineering background, this article reveals buried through field research, numerical simulation, theoretical analysis practice. ex...

The green roof technology provides environmental benefits by protecting the base roof membrane of buildings against solar radiation and temperature fluctuations and by helping to reduce building’s energy consumption by direct shading. Although several investigations have been performed to explore the energy performance of vegetated roofs as natural cooling devices, there is a lack of data conce...

This paper presents a novel approach to building roof modeling, including roof plane segmentation and roof model reconstruction, from airborne laser scanning data. Segmentation is performed by minimizing an energy function formulated as multiphase level set. The energy function is minimized when each segment corresponds to one or several roof plans of the same normal vector. With this formulati...

In this study, the nonuniform deformation and failure of goaf retaining roadway in an inclined coal seam due to repeated mining have been investigated by field verification, theoretical analysis numerical simulation. As a case 3131 headentry mine Sichuan province was considered. The characteristics surrounding rock along gob distribution evolution plastic zone stress direction gob-side entry (G...

abstract this paper by reviewing the main examples of small to medium-scale retractable roof structures covering building courtyards is to present an innovative rigid retractable roof system employing spatial frames for a courtyard of an existing building in tabriz islamic art university. the courtyard is currently used for temporary exhibitions and gatherings whenever permitted by environmenta...