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This study aims to explore the association between early sex initiation and subsequent unsafe sexual behaviors and risks among Chinese female undergraduates. Of 4769 participants, 863 (18.1%) reported ever having sexual intercourse. The mean age of sexual debut was 19.3 (±1.7) years. Females initiating sex earlier were more likely to have first sex with men(More)
The high resolution required by various modes of Synthetic Aperture Radar (SAR) results in a huge amount of sampling data, which brings a demand for bigger storage. Recently, a novel SAR concept based on Compressive Sensing (CS) theory asserts that an unknown sparse signal can be recovered exactly with an overwhelming probability even from what appear to be(More)
Wi-Fi indoor positioning algorithms experience large positioning error and low stability when continuously positioning terminals that are on the move. This paper proposes a novel indoor continuous positioning algorithm that is on the move, fusing sensors and Wi-Fi on smartphones. The main innovative points include an improved Wi-Fi positioning algorithm and(More)
We consider the maximum deviations of the sample covariances under the contexts of high dimensional data analysis and time series analysis. In the large n (number of observations) and large m (data dimension) paradigm, we show that the maximum deviation of the sample covariances converges in distribution to the extreme value distribution of type I. The(More)
BACKGROUND Among millions of people who suffer from schistosomiasis in China, adolescents are at increased risk to be infected. However, there is a lack of theory-guided behavioral prevention intervention programs to protect these adolescents. This study attempted to apply the Protection Motivation Theory (PMT) in predicting intentions to engage in(More)
In this paper, the relative RF characteristics of double gate and single gate structures are carefully investigated and compared. Also the impact of structural parameters on RF performance, such as body thickness, gate resistance and spacer lateral length is well studied and optimized to get more specified and practical results
OBJECTIVE To understand the schistosomiasis prevention knowledge of middle school students from areas with different endemic levels in Hubei Province. METHODS The schistosomiasis endemic regions were divided into transmission controlled areas and endemic controlled areas in Hubei Province, middle school students from different types of areas were selected(More)
By thermogravimetric analysis (TGA) study, the characteristics of oxygen-enriched air combustion of paper mill sludge were investigated. Experiments on oxidative of paper mill sludge were performed under different atmospheres at 20 degrees C/min. There are two distinct decomposition processes were observed from the obtained thermogravimetric curves. One of(More)