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  • Effect of High EnergyW6+ Pre-implantation on Surface Microstructure of Tungsten Irradiated by Low-energy Hydrogen Ions

    Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《材料研究学报》

    Abstract: Bare and high-energy (20 MeV) W6+ pre-implanted polycrystalline tungsten samples were irradiated with low-energy H-ions. The effect of H-ions energy (20-520 eV) and irradiation temperature (673-1073 K) on the microstructure evolution of these samples was characterized by means of non-destructive conductive atomic force microscopy and scanning electron microscopy in terms of the surface morphology and distribution of irradiation induced defects. The results show that a large number of nanometer- sized protuberances were formed on the irradiated tungsten samples, but the irradiation induced damage for the pre-implanted ones was slighter than the bare ones. For pre-implanted samples, low-energy H ions irradiation results in a random distribution of nanometer-sized protuberances, indicating that high-energy W6+ implantation can release the surface damage of tungsten induced by low-energy H ions to some extent. It also showed that the release effect was decreased when the irradiation temperature was higher than 1073 K.

  • Walking on the Mental Number Line in Virtual Reality:Based on Bayesian Analysis

    Subjects: Psychology >> Cognitive Psychology submitted time 2021-01-06

    Abstract: At present, Spatial-Numerical Association of Response Codes (SNARC effect) has been widely studied in the field of cognitive psychology. However, few studies have examined the effect of SNARC effect on real life activities (such as walking). This study explores the effect of number magnitude cognitive representation on the activation of spatial direction movement from the perspective of embodied cognition. When different amounts of stimuli were present in the virtual environment, whether the experimental paradigm of "mental number line" of newborn chickens and the results which has been published on science by Rugani, Vallortigara, Priftis and Regolin (2015a) could be transferred to human beings. This study attempts to use Bayesian analyses to make full use of the prior information of bias information which may exist in the subjects and the bias information of the participants in each trial, so as to obtain the bias of the participants in the presentation of different amounts of stimuli. But we did not get very persuasive data, and analyzed the possible reasons.

  • 基于构件的质量验收管理研究

    Subjects: Civil Engineering and Building Construction >> Civil Construction Engineering submitted time 2017-12-21 Cooperative journals: 《土木建筑工程信息技术》

    Abstract: For a long time,the traditional quality management in the construction industry is divided into three parts,quality assurance system construction,on-site quality acceptance and quality defects management of finished products. The quality management of this model is carried out in the form of construction tasks,in the strict sense,the quality process management of the engineering structure itself is not carried out. With the increasing application of BIm in the construction industry,the process of building industrialization continues to advance. By means of structural components,standardized components,production processes,fine matching procedures and acceptance iterms. So that it is possible to explore the management of quality acceptance based on component.

  • 板式无砟轨道精调信息化管理系统研发

    Subjects: Civil Engineering and Building Construction >> Civil Construction Engineering submitted time 2017-12-21 Cooperative journals: 《土木建筑工程信息技术》

    Abstract: CRTS III slab ballastless railway track is an innovative slab ballastless track with completely independent intellectual property rights of China. As a new structure type of line construction for passenger special line,a complete set of construction techniques has been summed up. With the development of CRH(China Railway High-speed) Technology,the application of CRTS III slab ballastless railway track will be increasingly more extenlive. Currently,with the continuous application of new technologies such as BIM(Building Information Modeling),IoT (Internet of things),big data,and etc.,the construction site management is also improving in refinement,information,scientific degree. The development of delicate adjusting information management system for the slab ballastless railway track enables the storage of the construction data in track plate installation process in a true,complete and timely manner,which is later used for analysis and application to realize the full life cycle management of slab ballastless track construction in real sense. The system is of great construction guidance value and technical research value.