Xianjin Huang

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CHINA’S SOIL POLLUTION IS MUCH WORSE THAN PREVIOUSLY THOUGHT (“CHINA GETS SERIous about its pollutant-laden soil,” C. Larson, News & Analysis, 28 March, p. 1415). A report released on 17 April admitted that 16.1% of the Chinese soil was polluted, including 19.4% of farmland, 10.0% of forest land, 10.4% of grassland, and 11.4% of unused land (1). Of the(More)
The Chinese railways are characterized by a wide range of various locomotive series. Nowadays, 80% of the locomotives driven by electricity run on the most main railroads. Most of the electric locomotives designed by AC-DC traction system till 2003 while DJ1 locomotives manufactured by AC-DC-AC traction system. Power Electronics is one of the pivotal parts(More)
Comment on “Late Pleistocene<lb>human skeleton and mtDNA link<lb>Paleoamericans and modern Native<lb>Americans” Kay Prüfer and Matthias Meyer Chatters et al. (Reports, 16 May 2014,<lb>p. 750) reported the retrieval of DNA<lb>sequences from a 12,000to 13,000-year-<lb>old human tooth discovered in an<lb>underwater cave in Mexico’s Yucatan<lb>peninsula. They(More)
To mitigate serious air pollution, the State Council of China promulgated the Air Pollution Prevention and Control Action Plan in 2013. To verify the feasibility and validity of industrial energy-saving and emission-reduction policies in the action plan, we conducted a cost-benefit analysis of implementing these policies in 31 provinces for the period of(More)
By analyzing the traction technologies used in existing locomotives and high speed trains, the development and current situation of traction technology were described, and some urgent problems which need to be solved were presented. Firstly DC motor traction technologies used in Chinese railway were introduced, the development process of DC to AC motor(More)
This paper optimises projected land-use structure in 2020 with the goal of increasing terrestrial ecosystem carbon storage and simulates its spatial distribution using the CLUE-S model. We found the following: The total carbon densities of different land use types were woodland > water area > cultivated land > built-up land > grassland > shallows. Under the(More)
Our work is the first study to explore the national and provincial composite carbon storage variations in terrestrial ecosystems of China caused by the entire flows of land use type conversion (LUTC). Only water body was excluded. The results indicated that terrestrial ecosystems of China lost 219 Tg-C due to LUTC from 1980 to 1995, and the amount was 60(More)
China has experienced enormous changes in land use in recent decades, which are largely driven by its unparalleled economic development. We analyze changes in vegetation and soil carbon storage between 1990 and 2010 resulting from combinations of land-use category conversion and management. Results demonstrate a major decline in grasslands (-6.85%; 20.83 ×(More)
China is undergoing rapid urbanization, enlarging the construction industry, greatly expanding built-up land, and generating substantial carbon emissions. We calculated both the direct and indirect carbon emissions from energy consumption (anthropogenic emissions) in the construction sector and analyzed built-up land expansion and carbon storage losses from(More)
To better develop the arc heater power-supply system, this paper presents an improved plasma arc model, which is formulated from the famous Mayr and Cassie models. Considering real working conditions, the disturbance created by the unstable mass flow rate is taken into account in the arc model, to improve the accuracy. An 18-pulse thyristor rectifier, with(More)