Xiao-Jie Chang

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PURPOSE To evaluate the quality of direct digital radiograph according to its application in dentistry. METHODS 1195 patients with dental caries, periodontal diseases, periapical diseases, trauma of teeth or hypodontia were tested with Trophy elitys Radio Visio Graphy(RVG) and the quality of the tests was evaluated at four levels. RESULTS It was(More)
Constructing the data model for public transportation by integrating the spatial and the non-spatial information , is the basis of reasonable plan and effective management of urban public transport. This paper presents a transit data model based on geographic information systems (GIS) technology, which utilizes arc-node networks, and manages the(More)
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