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Through the analysis of vessel track, the characteristics of traffic flow can be well obtained, and waterway traffic safety can be ensured. In order to restore inland water vessel track which is more consistent with real one, noise in the AIS information is supposed to be removed. This paper presents a denoising method of inland vessel track which consists of three basic steps. Firstly, the points...
This paper adopts Data Envelop Analysis model to evaluate dynamically operational efficiency of 26 Chinese listed logistics corporations in light of the financial data during the period of 2008-2010. It is found that both pure technical efficiency and scale efficiency are low and unstable, which lead to less desirable operation efficiency of listed logistics corporations although those in Western...
Pot experiment was conducted to study phytoremediation efficiency of maize, ryegrass, Indian mustard and Medico go sativa L for heavy metal-organic contaminated sewage river sediment. Three different treatment levels were designed, and urease activity change in sediment was inspected. Results showed that the method of EDTA-induced phytoremediation can promote the absorption of heavy metal by plant...
This paper focuses on piecewise linear growth model of water quality about the river. The experiment was performed on South Sewage Discharge River of a certain Coastal City, in China. Physical, chemical parameters such as water temperature (T), turbidity (Tur) were measured over a one-year period including dry period, level period (May), wet period, level period (Oct.). Based on multilevel models,...
According to Environmental Quality Standards for Surface Water in China (GB3838-2002), we used the 2006-2007 monitoring data to evaluate and characterize the water quality condition of a landscape river in Tianjin based on the comprehensive index methods such as Nemerow Index and single-factor assessment. The results are obtained as follows: (1) The water quality of M River belongs to class V water...
According to Environmental Quality Standards for Surface Water in China (GB3838-2002), monitoring data were used to evaluate and characterize the water quality condition of a landscape river in Tianjin based on the comprehensive index methods such as Nemerow Index and single-factor assessment. The results showed that the water quality of J River belongs to class V water body; the main pollutants of...
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