Wyniki wyszukiwania - BazTech

1

The Relative Influence of Environmental and Human Factors on Seed Plant Richness at the Province Scale in China

Li G., Guo K., Liu C., Liu Y., Song C., Du S.

Polish Journal of Ecology

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2015

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Vol. 63, nr 2

184--197

EN

Seed plant diversity is under threat due to human over-exploitation and changes in land use. There is a need to identify regions where seed plant diversity is most at risk and establish nature reserves to protect the most important species. This study collected province scale seed plant richness data and corresponding environmental, social and, economic data in China in order to assess the impact of environmental and socio-economic factors on seed plant diversity and to quantify the relative importance of climate, human disturbance, and habitat heterogeneity on the distribution of seed plant diversity. A downscaling model was established to map the spatial distribution of seed plant diversity at a 1-km resolution. The results showed that temperature and precipitation seasonality, potential evapotranspiration, humidity index, altitude range, and gross domestic product were important determinants of seed plant diversity. The relative contribution of temperature seasonality was the most important factor (explaining 29.9–36.2% of the variation). Climate, human disturbance, and habitat heterogeneity explained much of the seed plant richness and density variation (about 69.4–71.9%). A scale-down model explained 72% of seed plant richness variation and showed that the center of seed plant species diversity was mainly located in the southeast area of China in the Qing-Tibet Plateau, Yun-Gui Plateau, Hengduan Mountain region, middle of the Sichuan Basins, Taiwan island, and Hainan island. This study improves our understanding of biodiversity hotspot regions and is a useful tool for biodiversity conservation policy and nature reserve management in China.

2

Catalytic pyrolysis of rice straw and product analysis

Song C., Pawłowski A., Ji J., Shan S., Cao Y.

Environment Protection Engineering

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2014

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Vol. 40, nr 1

35--43

EN

The effect of addition of NaOH on the pyrolysis of rice straw and properties of its product were investigated. The pyrolysis was examined by means of the thermogravimetric (TG) analysis, and the pyrolysis product was characterized by the elemental analysis, GC and GC-MS. The result showed that addition of NaOH can significantly change TG and DTG peak of the pyrolysis of rice straw. As a result of the catalysis, significant difference in the properties of pyrolysis products was also observed. The addition of the catalyst promoted the increase of the hydrogen content of the gaseous product (from 1.6% to 53.37%), as well as that of the H/C and O/C ratios of solid residue. GC-MS analysis indicated that the liquid product was mainly made up of ketones, phenols and furfural, and NaOH addition did not change the main constitute of the liquid product, but changed their relative content.

3

Science on the TeraGrid

Katz D. S., Callaghan S., Harkness R., Jha S., Kurowski K., Manos S., Pamidighantam S., Pierce M., Plale B., Song C., Towns J.

Computational Methods in Science and Technology

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2010

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Vol. spec. iss. (1)

81-97

EN

The TeraGrid is an advanced, integrated, nationally-distributed, open, user-driven, US cyberinfrastructure that enables and supports leading edge scientific discovery and promotes science and technology education. It comprises supercomputing resources, storage systems, visualization resources, data collections, software, and science gateways, integrated by software systems and high bandwidth networks, coordinated through common policies and operations, and supported by technology experts. This paper discusses the TeraGrid itself, examples of the science that is occurring on the TeraGrid today, and applications that are being developed to perform science in the future.

4

The study of the new method for falling dust - by adding the penetrative rod to infusion water

Jin L., Song C., Wie W.

Zeszyty Naukowe. Inżynieria Środowiska / Politechnika Opolska

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2003

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Vol. 291, z. 4

571-578

EN

The new method for falling dust is to adding one kind of penetrative additive to the infusion water in order to improve the penetrative ability of water. The manufacturing process, characteristics, and application results of the rod-like penetrative additive (the penetrative rod) were discussed. The components and functions of the penetrative rode were studied carefully. Ultimately the components were decided after careful selection among molds, mainly including hygroscopic major components and auxiliary material. The result of on-site practical application show that such an addictive can increase the water penetrative ability effectively and has a remarkable effect on preventing dust production during coal seam excavation. The penetrating radius, the infusing velocity and the dust-preventive effect were systematically studied.

5

The preparation and application of the bacteriostatic inorganic materials for environment decontamination

Lin H., Li T., Song C., Wang S.

Zeszyty Naukowe. Inżynieria Środowiska / Politechnika Opolska

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2003

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Vol. 291, z. 4

579-590

EN

The preparation technique of zinc exchanged zeolite antibacterial material for environment decontamination is investigated in the paper. A intermediate of the antibacterial material with 5.56wt% exchanged Zn2+ is obtained by optimizing all the relevant factors, and the stabilizing treatment of the material has also been carried on so as to control the solution speed of Zn2+. The test for the antibacterial performance of the material shows that the bactericidal rate for bacterium coli and staphylococcus can reach 99% under the condition of MIC=500mg/ml, and the absorbability of the material for small polar molecules is also pretty strong so as to be used for moisture absorption, deodorization and decontamination indoors. The antibacterial mechanism and the application of the material have also been discussed in this paper.

6

Ecological beds for sludge treatment

Chang G., Song C., Wang L., Sun W., Wang J.

Zeszyty Naukowe. Inżynieria Środowiska / Politechnika Opolska

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2003

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Vol. 291, z. 4

497-502

EN

Comparing with other methods, ecological beds have some typical features like low cost, low energy-consumption and highly efficient technology. The mechanism of ecological beds and the use of ecological beds in XiBaiPo power plant are reported in this paper. In the XiBaiPo power plant, the synergistic action between GaoYangMao and reed will reduce the adverse impact from climate and improve the ratio of contaminant degradation. The method is used to reduce sludge volume and using it as a soil fertilizer, soil amendment and landfill cover.

7

Application of fuzzy control for COD in wastewater treatment

Hao J., Song C.

Zeszyty Naukowe. Inżynieria Środowiska / Politechnika Opolska

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2003

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Vol. 291, z. 4

259-263

EN

The current status of automation technology in wastewater treatment industry is analyzed. The successful application of fuzzy control technology in wastewater treatment is introduced. As complex and uncertainty it is difficult to build up the exact mathematical model for the nonlinear dynamic system of activated sludge process in wastewater treatment. In the paper, using chemical oxygen demand (COD) as fuzzy control parameter, a new system is developed to realize automatic control of sequence biologic reactor (SBR) process, which offers a practical approach for COD value automatic control in the treatment of wastewater.