Jiangxi Water Resources Institute

Nanchang, China

Jiangxi Water Resources Institute

Nanchang, China
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Liu Z.-M.,East China Jiaotong University | Xu L.-C.,East China Jiaotong University | Zhan P.,Jiangxi Water Resources Institute | Zhou Y.,Jiangxi Water Resources Institute | Liu J.-H.,Jiangxi Water Resources Institute
Xiandai Huagong/Modern Chemical Industry | Year: 2017

Using heat/Na2S2O8 system to treat leachate bio-treated tailwater, some factors, including Na2S2O8 dosage, the initial pH, reaction temperature, reaction time on the treatment effects, are investigated.The experimental results show that this system can efficiently remove the contaminants from the leachate bio-treated tailwater.Under the conditions of initial pH=4, reaction time t=12 h, temperature T=60℃, Na2S2O8 amount=4 g/L, the COD and color removal rates are 63% and 100%, respectively.It is found that a mass of high molecular humic substances are degraded into small molecules of fulvic acid and the organic pollution degree is decreased. © 2017, China National Chemical Information Center. All right reserved.


Huowen J.,Jiangxi Science and Technology Normal University | Huanliang X.,Jiangxi Agricultural University | Huiyun Z.,Jiangxi Water Resources Institute
Proceedings of 2015 IEEE Advanced Information Technology, Electronic and Automation Control Conference, IAEAC 2015 | Year: 2015

Social networks have been widely used, providing people with great convenience but also yielding potential risk of privacy disclosure. To prevent attacks based on background information or query that may expose users' privacy, we propose a method to achieve k-anonymization for network graphs. The concept of similarity matrix and that of the distance between a vertex and a cluster are defined based on vertex connectivity. On this basis, we present a clustering-based graph partitioning algorithm to obtain the K-anonymized graph of a certain network graph. Simulation experiments are conducted to analyze and verify the effectiveness of our algorithm. © 2015 IEEE.


Lu J.,Jiangxi Water Resources Institute | Zhong X.,Jiangxi Provincial Institute of Water science | Wu H.,Jiangxi Water Resources Institute | Wu H.,Jiangxi Provincial Institute of Water science | Wang H.,Hohai University
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2016

The movement of lake sediments under different hydrodynamic conditions was simulated, and vertical distribution characteristics of heavy metals in lake under different hydrodynamic conditions were explored with self-designed circulating flume and sediments sampled from Xingzi section of Poyang Lake. The flume device was composed of inlet tank (0.5 m3), test area (2 m in length, 1 m in width, and 0.5 m in height), outlet tank (0.5 m3), storage tank (1 m3) and pump (maximum flow rate of 100 m3/h). Prior to testing, sediment was spread at the flume bottom, and lightly pressed and flattened to a thickness of 8 cm. After remaining it untouched for 0.5 h, water was added into the device. Water depth in the flume was controlled at 140 cm. Water was pumped from the storage tank into the inlet tank, and flowed through the test area, the outlet tank and eventually returned to the tank. During the test, the flow rate in the flume was gradually increased from 0 cm/s, and its flow rate was set through the control of the gate as 0 cm/s, 5 cm/s, 15 cm/s, 25 cm/s, 35 cm/s, 45 cm/s and 65 cm/s. To ensure that the water flowed through the flume at least once, the testing period was maintained 1 h under each flow rate, and then immediately proceeded to the next flow rate until it reached the maximum flow rate. During the test, the incipient motion characteristics of sediment, including critical motion state, slight motion state and plenty motion state, were initially simulated. The water depth in the flume was divided into four layers. The total heavy metal concentration and dissolved heavy metal concentration were measured at different flow rates and different water depths. In order to minimize deviation, heavy metal concentration was measured three times and the average value was taken under each group of water flow and water depth condition. When the sediment was in critical motion state at flow rate of less than 25 cm/s, a diluted suspension at the sediment surface was appeared with the increase of flow rate. The total heavy metal concentrations were similar at different water depths in this period. When the sediment was in slight motion state at flow rate of 25 cm/s to 50 cm/s, water became turbid, with part of the sediment washed up. Shear stress at sediment surface was obviously larger than that in critical motion state, and the total heavy metal concentrations were increased from water surface to bottom, although it was not obvious. When the sediment was in plenty motion state at flow rate of 60 cm/s to 70 cm/s, a large amount of sediment was washed up, and water became turbid in a short period. Large quantities of heavy metals in the sediment were released into water, and the total heavy metal concentration was increased obviously along the water depth direction. In addition, by analyzing the concentrations of dissolved Cu, Zn, Cd and Pb in each layer with curve fitting method, vertical distribution characteristics of heavy metals under different hydrodynamic conditions were revealed. The basic formula was established between heavy metal concentration and height above sediment surface. The results showed that when the hydrodynamic condition was strong, the concentrations of dissolved Cu, Zn, Pb were increased logarithmically from water bottom to water surface. Furthermore, to detect the applicability of the established formula, the testing results were applied to measurement of Poyang Lake, water samples collected from Poyang Lake Bridge section and Xingzi section at 0.3 m, 0.8 m, 1.3 m and 1.8 m above sediment were used to measure the dissolved heavy metal concentration. Flow rate at the two sections were 39 cm/s, 75 cm/s and 44 cm/s, 68 cm/s, respectively, when the samples were collected. By substituting the measured data into the established formula, the obtained result showed that the relative error between calculation results and measured results was within ±15%. The formula was applicable at flow rate of 65 cm/s to 75 cm/s in lakes with sediment grain size of 50 μm to 200 μm. The established formula was basically reasonable. The device was feasible for the experiment with strong operability. The research results could provide references for revealing heavy metal release characteristics under different water conditions. © 2016, Chinese Society of Agricultural Machinery. All right reserved.


Lu J.,Jiangxi Water Resources Institute | Zhong X.,Jiangxi Provincial Institute of Water science | Wu H.,Jiangxi Water Resources Institute | Wu H.,Jiangxi Provincial Institute of Water science | Wang H.,Hohai University
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2016

To study the release flux of heavy metals in sediment of the lake under different hydrodynamic conditions, an interior experiment was designed and carried out. The experiment aimed to simulate the migration of sediment in the lake and to investigate the release regularity of heavy metals in sediment under different hydrodynamic conditions. The sediment in Xingzi Reach of Poyang Lake was selected as the experiment material and a circulating facility was designed. The circulating facility was composed of an inlet tank (0.5 m3), an experimental tank (2 m×1 m×0.5 m), an outlet tank (0.5 m3), a storage tank (0.5 m3) and a pump. First, sediment had been tiled at the bottom of the experimental tank with the thickness of 8 cm for half an hour. Then water of 30cm deep was filled in three tanks. The experiment was carried out by pumping water into the inlet tank from the storage tank, going through the experimental tank, the outlet tank and finally back to the storage tank. The average flow velocity was controlled at 0 to 5, 15, 25, 35, 45, and 65 cm/s as the highest speed by the gate. The test of each speed maintained 1 hour to ensure the water was circulated through the facility at least once. In this case, the test not only simulated different migration state under different hydrodynamic conditions, which were "stationary state", "slight migration state" and "intense migration state", but also detected the total concentration of heavy metals in water under different flow velocity conditions at the same time. In order to reduced the experimental error, the sample was taken 3 times to calculate an average concentration. Through analyzing varied heavy metal concentration under different hydrodynamic conditions, some conclusions were drawn as below: When flow velocity was less than 25cm/s, heavy metals were released only in interstitial water for not much sediment was suspended and heavy metal concentration was not increased greatly with slight interference; With increasing flow velocity, sediment shifted from "stationary state" to "slight migration state" and the concentration of Cu, Zn, Cd and Pb rose evidently for that much sludge moved up, smaller particle mud of heavy metals went up to overlying water, and large quantity of heavy metals released in interstitial water at the same time; When the flow velocity reached 60-70 cm/s, "intense migration state" was achieved since the movement of mud at the bottom was relatively severe and silt by piece. The concentration of Cu, Zn, Cd and Pb in water and its release flux in sediment speeded up. When flow velocity was 65 cm/s, the density of Cu, Zn, Cd and Pb was 127.16, 220.5, 0.28, 11.07 μg/L respectively. The release flux was calculated by analyzing the concentration changes of Cu, Zn, Cd and Pb in the water under different flow velocity conditions. The relationship between release flux of heavy metals in sediment of the lake (y) and speed (x) was established by linear fitting. The result shows that release flux of Cu, Zn, Cd and Pb in sediment of the lake has an exponential relationship with speed. In addition, to test the applicability of the established related equation, this paper applied the equation to field experiment of Poyang Lake. First, the concentration of heavy metals in Poyang Lake under different hydrodynamic conditions was detected and the velocity was recorded. And then the release flux of heavy metals in Poyang Lake was calculated by referring to the relationship which was established from the interior test. The concentration of heavy metals in Poyang Lake was calculated (that is the calculated concentration) according to the release flux. Finally, the calculated concentration was compared with measured concentration. The result shows that the values between calculated concentration and measured concentration are very close with the error range of 5%-20%, which indicated that the relationship between release flux of heavy metals and speed set in this paper was basically reasonable and could adapt to conditions similar with Poyang lake and the sediment particle size of 50 to 200 μm, of the experimental facility was feasible and operable. The results can provide scientific basis on control and governance of heavy metal pollution. © 2016, Editorial Department of the Transactions of the Chinese Society of Agricultural Engineering. All right reserved.


Zhang L.,Jiangxi Normal University | Wan C.,Jiangxi Water Resources Institute
Proceedings of the 9th International Conference on Computer Science and Education, ICCCSE 2014 | Year: 2014

Modern educational technology ability is a effective way to improve teaching efficiency and has become an important part of teacher training in most normal universities. Under the premise of the great development of vocational education, modern educational technology teaching to vocational teachers has become the general trend. This paper brings up construction program of educational technology capacity for vocational education teachers to standardize the management of vocational teacher training efficiently and improve the teaching performance of vocational education. © 2014 IEEE.


Zhang L.,Jiangxi Normal University | Wan C.,Jiangxi Water Resources Institute
Proceedings of the 9th International Conference on Computer Science and Education, ICCCSE 2014 | Year: 2014

Establishing electronic portfolio is one of the effective approaches to promote teachers' professional growth. It enable us to give teachers developmental evaluation, and can facilitate the teaching research as well as academic communication between teachers. This article applied the service which is based on moodle platform to the design of electronic portfolio with the purpose of helping teachers' professional growth. © 2014 IEEE.


Huang S.K.,Jiangxi Water Resources Institute | Gu P.F.,Nanchang Institute of Technology | Zhao X.Y.,Nanchang Institute of Technology | Pei Q.B.,Nanchang Institute of Technology | Gao J.L.,Nanchang Institute of Technology
Applied Mechanics and Materials | Year: 2014

Using a soil column experiments to analyze the influence of different density of one dimension vertical infiltration of water infiltration rate, cumulative infiltration and wetting front. The experimental results showed that the bulk density of the infiltration rate, cumulative infiltration and wetting front has a significant impact. Infiltration rate, cumulative infiltration and wetting front were decreased with increasing density in the same period of infiltration. The greater the soil bulk capacity, the larger the infiltration decrease ration µ and η, respectively compared to the based accumulative infiltration and the based wetting front depth.Red loam was developed in the tropical and sub-tropical rain forest soils.In order to study the infiltration characteristic of the red loam,using laboratory experiments method to study the red loam one-dimensional vertical infiltration under different bulk density infiltration rate, cumulative infiltration and wetting front,the results of the study can provide quantitative analysis basis and farmland irrigation for the planting of economic crops in Jiangxi hills regions. © (2014) Trans Tech Publications, Switzerland.


Liqin Z.,Jiangxi Science and Technology Normal University | Ning W.,Jiangxi Science and Technology Normal University | Chunhui W.,Jiangxi Water Resources Institute
10th International Conference on Computer Science and Education, ICCSE 2015 | Year: 2015

Blend learning is a study way and idea, which is concerned by domestic and overseas researchers gradually with the introspection of E-learning and the return of C-learning. MOOC has the characteristics of large scale, online and open. MOOC with its open sharing concept provides a new idea for blend learning research. This paper combine face to face classroom teaching with MOOC-based E-learning on network. MOOC-based blend learning mode has been designed from the point of view of theory and practice, Which will contribute to provide information and reference for related research of MOOC based blend learning. © 2015 IEEE.


Liqin Z.,Jiangxi Science and Technology Normal University | Chunhui W.,Jiangxi Water Resources Institute | Ning W.,Jiangxi Science and Technology Normal University
10th International Conference on Computer Science and Education, ICCSE 2015 | Year: 2015

With the rapid development of the information technology and network technology, collaborative learning has been developed largely. Collaborative learning under the network environment is expediently alternant, flexible and diverse, wide and efficient. Wiki technology, with its characteristic of collaboration and sharing, provides powerful teaching environment support. This paper analyzes the feasibility of applying Wiki platform to collaborative learning, studies from two aspects of theory and practice on how to carry out effective collaborative learning activities in the Wiki platform, and then establishes a collaborative learning system based on Wiki. © 2015 IEEE.


Xu J.,Jiangxi Water Resources Institute
Proceedings - 2016 8th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2016 | Year: 2016

Human 3D garment modeling is of great importance for clothing design and computer vision, and the existing computer aided garment system cannot effectively find threedimensional style influence of their design only when the sample dress have been produced. The proposed human 3D garment modeling system is constructed using a library of garment models and garment parts, in which different type of garments are utilized, including skirts, coats, shirts, and trousers. Particularly, we describe the human 3D garment model as a graph, and an improved mesh is denoted as 1) vertex set, 2) edge set and 3) tetrahedron set. Afterwards, we convert the human 3D garment modeling problem by integrating two energy functions. To demonstrate effectiveness of our research, we use a normal female garment design to prove that our method is effective to model human 3D garment. © 2016 IEEE.

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