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Ma H.,Shanxi University | Ma H.,Shanxi Polytechnic College | Wang L.,Shanxi University | Liu Z.,Shanxi University | Guo Y.,Shanxi University
International Journal of Environmental Analytical Chemistry | Year: 2016

In this work, ionic liquid–graphene nanosheets (IL–GNs) were synthesised and used as an enhanced material for sensitive detection of methyl parathion (MP) by electrochemical method. IL–GNs were characterised by UV–Vis spectroscopy, transmission electron microscopy (TEM), X-ray photo-electron spectroscopy (XPS), Fourier transform Infrared (FT-IR) spectroscopy and Raman spectroscopy, which confirmed that IL was successfully covered on the surface of GNs. Significantly, due to the coupling of excellent properties of GNs and IL, the IL–GNs-modified glassy carbon electrode (IL–GNs/GCE) showed higher signals for MP response than the GNs/GCE and bare GCE. At the IL–GNs/GCE, the peak currents increase linearly with the concentration of MP in the range of 5.3 ng/mL to 2.6 μg/mL with the detection limit of 1.1 ng/mL, which was better than other enzyme-based and enzymeless sensors. The IL–GNs-based electrochemical sensor was also successfully demonstrated for the detection of water sample with satisfactory results. Furthermore, the proposed electrochemical sensor exhibited satisfied stability and reproducibility. The simple sensing platform can be extended to detect other organophosphate pesticide. © 2015 Taylor & Francis. Source


Liu J.,Shanxi Polytechnic College | Zhao B.,Taiyuan University of Technology
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2011

This paper analyses the selection of the step-size factor in a new variable step-size constant modulus algorithm (CMA) based on mean square error (MSE) and determines the value range of the step-size factor by computer simulation, which establishes the solid foundation to the convergence superiority of the new algorithm by computer simulation. © 2011 Springer-Verlag. Source


Luo G.-L.,Shanxi Polytechnic College
Proceedings - 2012 International Conference on Computing, Measurement, Control and Sensor Network, CMCSN 2012 | Year: 2012

In this paper, the Active Power Filter direct current side voltage control method has been improved. On the basis of the traditional PID, it proposes a complex controller with a combination of fuzzy control and PID control in order to improve the control system's performance. Through MATLAB simulation, the correctness and feasibility of the method are verified. © 2012 IEEE. Source


Zhao B.,Taiyuan University of Technology | Liu J.,Shanxi Polytechnic College
Journal of Computational Information Systems | Year: 2011

The constant modulus algorithm (CMA) is a stochastic gradient adaptive algorithm that results from minimizing a no-quadratic cost function of the equalizer coefficience involving higher order statistics. The variable step-size constant modulus algorithm (CMA) solves the contradiction between convergence speed and convergence precision of the fixed step-size CMA. Among many variable step-size constant modulus algorithms, a common method is using MSE to control the step-size variation. This paper studies the influence of MSE on tracking channel and anti-interference performance of an improved variable step-size constant modulus algorithm. The computer simulation result is in good agreement with theoretical analysis. © 2011 Binary Information Press. Source


Li J.,Taiyuan University of Technology | Li J.,Shanxi Polytechnic College | Li Y.,Taiyuan University of Technology | Wang H.,Taiyuan University of Technology
Journal of Computational Information Systems | Year: 2015

With the rapidly development of the mobile communication technology, people are paying more attention on the provision of high Quality of Service (QoS) in the application of Wireless Sensor Networks (WSN). In this paper, we propose a QoS Routing Protocol Based on the Ant Colony Optimization (QR-ACO) for wireless sensor networks. In order to balance the network energy and provide the high quality of QoS, the proposed protocol makes use of energy factor in the transition probability, and uses the residual bandwidth and delay as the QoS constraints in the pheromone updating rule. Simulation results show the QR-ACO protocol can effectively prolong the network lifetime, reduce the delay, increase the residual bandwidth, and satisfy the QoS requirements. ©, 2015, Journal of Computational Information Systems. All right reserved. Source

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