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This paper presents a novel multi-touch interface based on binocular stereo vision, which achieves natural interactions through moving and clicking several fingers on an interface. The technology uses two cameras at different viewpoints to capture video images covering the interface in real time. We integrate skin-color information to track finger’s(More)
This research utilized two optical encoders as local sensors, and a low cost GPS receiver as a global sensor. The GPS and encoders were integrated to form a complementary sensor pair for high accuracy positioning. The software for sensor fusion was composed of two parts: (1) a dynamic model to integrate GPS and optical encoders, which is based on the(More)
It is desirable to store data on data storage servers such as file servers in encrypted form to reduce security risks. But this usually implies that one has to sacrifice functionality for security. For example, if a client wishes to retrieve only documents containing certain words, it was not previously known how to let the data storage server perform the(More)
In order to solve the existing security problem of the distributed network cloud disk, such as transmission, storage security problems, etc, a network cloud disk safety storage scheme based on Hadoop is proposed. Based on the different confidential level of user data, it gives selective encryption scheme, which gives full consideration to the following(More)
  • Huang Jing
  • 2009
This paper systematically analyzes the influence factors of subway, establishes the assessment model of fire risk evaluation. This paper introduces the evaluating indicators of fire risk with analytic hierarchy process (AHP). A certain city’s subway is evaluated basing on the model. The result shows that this evaluation method is agree with actual(More)
OBJECTIVE To describe the time point prevalence and distribution of all types of mental disorders in Hebei Province. METHODS From October 2004 to March 2005, stratified multi-stage cluster randomization was used to identify 24,000 subjects ≥18 years of age in Hebei Province. An expanded version of the General Health Questionnaire (GHQ-12) was used to(More)
In this paper, we aim at providing users with friendly interface over XML streams and useful data fragments by introducing keyword search related technology into XML streams. We propose a new index which is based on directed acyclic graph to organize the large number of keywords and queries to reduce the cost of query processing, then a stack based method(More)
BACKGROUND Hitherto, a population-based analysis of the cause of death in urban areas of Western China has not been undertaken over an extended period. The aims of this study were to calculate the overall and annual cause-specific mortality rates by age and sex in urban areas of Western China from 2003 to 2012 and to evaluate the quality of the data. (More)