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Chen H.,Bohai University | Liu Y.-J.,Bohai University | Jiang Y.-H.,Liaoning Petrochemical Vocational Technology College | Gu J.-L.,Bohai University | Sun T.,Northeastern University China
Desalination and Water Treatment | Year: 2012

As the replacement of previously recommended poly (4-styrenesulfonate) (PSS) with Mw~7×104 (PSS-7E4) for measuring metal ions by diffusive gradients in thin films (DGT), a relatively large molecular weight PSS with Mw~1×106 (PSS-E6) was used as binding phase in the liquid-type DGT device (PSS-E6 DGT). The binding capacities of PSS-E6 DGT for metals and the stability constants of PSS-E6 with metals were also investigated. The heavy metal speciations measured by PSS-E6 DGT in spiked river water (Cu2+: 26.01 ± 2.59%, Cd2+: 42.96 ± 2.56%, Co2+: 16.41 ± 1.66%, and Ni2+: 18.24 ± 1.96%) and in spiked domestic wastewater (Cu2+: 10.35 ± 1.29%, Cd2+: 20.31 ± 1.25%, Co2+: 8.04 ± 0.89%, and Ni2+: 8.86 ± 0.98%) were consistent with those measured by PSS-7E4 DGT in spiked river water (Cu2+: 26.91 ± 2.82%, Cd2+: 40.88 ± 3.04%, Co2+: 14.83 ± 1.84%, and Ni2+: 16.65 ± 1.83%) and in spiked domestic wastewater(Cu2+: 9.76 ± 1.17%, Cd2+: 19.36 ± 1.49%, Co2+: 7.65 ± 0.92%, and Ni2+: 7.83 ± 1.03%), respectively. Compared with PSS-7E4, PSS-E6 was more suitable as binding phase in the DGT device for its lower pretreatment depletion rate, lower cost, and lower pollution. © 2012 Desalination Publications. All rights reserved.


Li L.X.,Shenyang Ligong University | Su C.Q.,Shenyang Aerospace University | Jin Y.J.,Liaoning Petrochemical Vocational Technology College
Applied Mechanics and Materials | Year: 2012

The reliability analysis for differential expansion of steam turbine is discussed extensively. The ultimate state equation of differential expansion of steam turbine is proposed according to stress-strength interference theory. Based on the premise that the probability distribution of random parameters has been known, the differential expansion of steam turbine is analyzed by saddlepoint approximation method. The probability density function and cumulative distribution function of the ultimate state equation are accurately and quickly obtained by the way of saddlepoint approximation and, as a result, the saddlepoint approximation method is proved accurate with high computing speed in comparison with the Monte-Carlo method. Therefore, the application of the saddlepoint approximation method is accurate and efficient. © (2012) Trans Tech Publications.


Li L.X.,Shenyang Ligong University | Su C.Q.,Shenyang Aerospace University | Jin Y.J.,Liaoning Petrochemical Vocational Technology College
Advanced Materials Research | Year: 2012

Based on Saddlepoint Approximation method and sensitivity analysis method, reliability sensitivity analysis for differential expansion of steam turbine with random parameters are studied. On the premise of the probability distribution of random parameters, using Saddlepoint Approximation method, probability density function of limit state function of differential expansion of steam turbine is obtained. The result of Saddlepoint Approximation method is very close to the one of Monte-Carlo, and the computing speed is fast. Then, the sensitivity analysis method and probability density function were employed to discuss the variation regularities of reliability sensitivity and the effect of design parameters on reliability of differential expansion of steam turbine is analyzed. © (2012) Trans Tech Publications.


Xi N.,Liaoning Petrochemical Vocational Technology College
WIT Transactions on Information and Communication Technologies | Year: 2014

In view of the situation that the existing consumption management system is expensive, huge, and not easy to be managed, this paper puts forward an implementation based on RFID technology and the database. The hardware of the system consists of microcontroller module, RF card reader module, and so on, and the software consists of MCU and computer programs. After experimental verification, the system has the advantages of low cost, easy deploy, and operate, and can meet the requirements of daily consumption management for small and medium enterprises. © 2014 WIT Press.


Wang H.,Liaoning University of Technology | Gao Y.,Liaoning Petrochemical Vocational Technology College
Proceedings of the 5th International Workshop on Chaos-Fractals Theories and Applications, IWCFTA 2012 | Year: 2012

A seven-mode truncation system of the Navier-Stokes equations for a two-dimensional incompressible fluid on a torus is considered. Its stationary solutions and stability are presented, the existence of attractor and the global stability of the system are discussed. The whole process, which shows a chaos behavior approached through an involved sequence of bifurcations, is simulated numerically by computer with the changing of Reynolds number. © 2012 IEEE.

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