In order to reduce the occurrence of drilling accidents in soft coal seams, this paper analyzes the causes of near-horizontal hole drilling under the coal mine and the formation process of jamming, and establishes a drilling mechanical model for each stage.Through the analysis of read more the main influencing factors of the sticking drilling, it i
Hemolytic anemia and right ventricular outflow tract obstruction following device closure of ruptured sinus of Valsalva have seldom been reported in isolated case reports, and exact incidence is not known.A gentleman presented with severe delayed hemolytic anemia following the use of cocoon duct occluder for ruptured sinus of Valsalva.Right ventric
This study will be discussed related to the professionalism of teachers after certification, the efforts made to develop the professionalism of teachers, and the impact of certification policy on the quality of education.This research subject is accounting certified teacher with a population of 7 informants, and informants are the principal support
Intestinal metastasis from unknown primary may simulate a primary colonic neoplasm in its clinical presentation.The gross histopathological examination may also mimic primary intestinal pathology.The diagnostic dilemma is furthered by paucity of available knowledge due to the limited literature.This article discusses three such cases (50-year-old m
3D city models are being extensively used in applications such as evacuation scenarios and energy consumption estimation.The main standard for 3D city models is the CityGML click here data model which can be encoded through the CityJSON data format.CityGML and CityJSON use polygonal modelling in order to represent geometries.True topological data s