Zhang S.,Harbin Normal University |
Zhang S.,Suihua College |
Zhou L.,Suihua College |
Zhang X.,Harbin Normal University
2nd International Conference on Information Engineering and Computer Science - Proceedings, ICIECS 2010 | Year: 2010
The earth observation technology of remote sensing can offer rich variable data of urban expansion and becomes the main approach to monitor urban expansion. To obtain the characteristics of urban expansion process of Suihua city, we extracted urban land information base in five periods remote sensing images (1976, 1990, 2001, 2006 and 2009) using GIS technology, with the help of expansion intensity model, spatial center of gravity transfer model, compact index, urban land fractal index and urban expansion elasticity coefficient we analyzed the area, direction and form feature of urban land expansion in Suihua city. The result shows that during the 33 years from 1976 to 2009, the urban land area of Suihua was continuously increased, in which the urban expansion scale and speed are the largest from 2001 to 2009, the urban expansion direction is mainly in the west and the south, the urban compactness index is reduced, and the form feature is complex. ©2010 IEEE.
Zhou L.-J.,Suihua College |
Zhang X.-P.,Harbin Normal University
Wetland Science | Year: 2010
Zhalong National Nature Reserve (46°52′N -47°32′N, 123°47′E - 124°37′E) is located in the west part of Heilongjiang province. Using interpretation of TM images in 1989 and 1999 and CBERS images in 2006, the landscape pattern change in Zhalong National Nature Reserve was analyzed by GIS in this study. The area of the Reserve is 2 100 km2. The landscape indices such as fragment index, fractal dimension and the diversity indexes, etc. were calculated and analyzed. The results showed that Phragmites australis marsh was the landscape base and it controlled the matter and energy transfer and flow,the areas of marsh were 1 279. 3 km , 1 250. 9 km2 and 1 238.4 km2 in 1989, 1999 and 2006 in Zhalong National Nature Reserve, respectively; the landscape was in fragmentation and the biodiversity declined in the Reserve during 1989 -2006; the main conversion of the landscape components were grassland into cultivated land, marsh into cultivated land and marsh into saline;the lanscape became complicated in the Reserve.
Zhang S.,Harbin Normal University |
Zhang S.,Suihua College |
Zhou L.,Suihua College
Proceedings - International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, CDCIEM 2011 | Year: 2011
Various factors affecting soil erosion were calculated, and the distribution map of soil erosion in Suihua in 2004 is obtained based on revised universal soil loss equation (RUSLE) and GIS technology and soil erosion of different land use types and different counties was analyzed, respectively. Results show that soil erosion in Suihua City mainly belongs to slight erosion, with an area of 16,083.9 km2, accounting for 46.34% of the total area; the area of moderate erosion is 1,583.52 km2, accounting for 4.56%. The erosion above moderate degree distributes in the river terrace along the rivers and transition zone with the washland. The area of soil erosion in Lanxi County and Qinggang County are the largest, and Wangkui County, Beilin District and Hailun City have the largest soil erosion above moderate degree. Soil erosion in dry farmland is the most serious with the largest area, soil erosion above moderate degree occurs in the unutilized land, and forest and grassland are subject to slight erosion. © 2011 IEEE.
Yu J.,Harbin University of Science and Technology |
Wang K.,Suihua College |
Jin F.,Suihua College |
Liu L.,Suihua College |
And 2 more authors.
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | Year: 2012
To investigate the mechanism of the rare earth element doping effect on the conductivity of materials, the electronic structures and the transport properties of the Nd-doped δ-MoN were theoretically studied by the combination of non-equilibrium Green's function technique with density functional theory. The Mo atoms at 2a and 6c in the Wyckoff positions were substituted, respectively, by the Nd atom for investigating the doping effect on the conductivity of δ-MoN. The band structures, the density of states and the current-voltage curves of the Nd-doped δ-MoN were calculated and analyzed. The calculated electronic structures indicate that the Nd-doping results in the enhancement of the density of states near the Fermi level, which is beneficial to the increase of the carrier density. The current-voltage curves show that the Nd-doped systems possess higher conductivity than the undoped system, implying that the conductivity of δ-MoN is improved upon the Nd-doping. The Nd-doped δ-MoN exhibits higher conductivity when the dopant Nd sits in the 6c position.
Nie C.-H.,Northeast Petroleum University |
Nie C.-H.,Suihua College |
Wang B.-H.,Northeast Petroleum University
Xiandai Huagong/Modern Chemical Industry | Year: 2011
On the basis of traditional process, new produced water treatment technologies are designed. The process and facilities on the pretreatment are added. The combination of hydrocyclone and quick-setting utensil is applied in the pretreatment of fine filtration. The process is shown as follows: the wastewater firstly entered into hydrocyclone equipment, then into the settling and separation equipment, after the fine filtration, the treated water obtained finally. In the treated water, the oil and the suspended substance content are 1.34 mg/L and 3.77 mg/L, respectively. The median diameter of the grains can reach 1.419 μm averagely. The oil content and the suspended substance content up to the standard are 100%.
Dong Y.,SuiHua College |
Tian X.,SuiHua College
Journal of Non-Crystalline Solids | Year: 2010
One pot synthesis of Fe2O3-Al2O 3 nanocomposites was investigated for using in water treatment. X-ray diffraction (XRD) characterization shows that the sample is α-Fe 2O3 and γ-Al2O3 mixed phases material. The porous structure of Fe2O3-Al 2O3 nanocomposites can be confirmed by N 2-sorption isotherms. The specific surface area determined by BET surface area measurement was found to be 102.1 m2 g-1. Moreover, the porous Fe2O3-Al2O3 nanocomposites samples showed an excellent ability to remove heavy metal ion (Cr (VI)) in water treatment. © 2010 Elsevier B.V. All rights reserved.