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Samples collected in the field were trimmed to remove visible veins and weathered surfaces and pulverized to ~200 mesh size in an agate mortar. Major element abundances were determined by wavelength-dispersive X-ray fluorescence (XRF) analysis on fused glass beads using a XRF-1800 at the

This article uses a panel data set of public listing companies in China empirically to explore the relationship between banks' lending behaviour and non-performing loans. Our results show that state-owned enterprises (SOEs) got more loans than other firms, other things being equal, and SOEs with high default risks were able to borrow more than the low-risk SOEs and non-SOEs. This suggests that Chinese banks had a systemic lending bias in favour of SOEs, particularly those with high default risks, during the period under investigation. The causes and implications of this behaviour are discussed.

In order to overcome the vulnerability of the global navigation satellite system (GNSS) and provide robust position, navigation and time (PNT) information in marine navigation, the autonomous positioning system based on ranging-mode Automatic Identification System (AIS) is presented in the paper. The principle of the AIS autonomous positioning system (AAPS) is investigated, including the position algorithm, the signal measurement technique, the geometric dilution of precision, the time synchronization technique and the additional secondary factor correction technique. In order to validate the proposed AAPS, a verification system has been established in the Xinghai sea region of Dalian (China). Static and dynamic positioning experiments are performed. The original function of the AIS in the AAPS is not influenced. The experimental results show that the positioning precision of the AAPS is better than 10 m in the area with good geometric dilution of precision (GDOP) by the additional secondary factor correction technology. This is the most economical solution for a land-based positioning system to complement the GNSS for the navigation safety of vessels sailing along coasts.

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