Cai L.,Ningbo Dahongying University
Materials Research Innovations | Year: 2015
A novel visible light-driven heterojunction photocatalyst composed of graphitic carbon nitride (g-C3N4) and bismuth oxychloride (BiOCl) was synthesized. The resulting g-C3N4/BiOCl composite was characterised by X-ray diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, and ultraviolet-visible diffuse reflection spectroscopy. Under visible light irradiation, g-C3N4/BiOCl composites displayed a markedly higher photocatalytic activity than pure BiOCl in the degradation of phenol and p-chlorophenol. Among the hybrid photocatalysts, g-C3N4/ BiOCl with 50% mass ratio of g-C3N4 exhibited the highest photocatalytic activity for the decolourisation of phenol. Enhanced photocatalytic performance resulted from the effective separation of photogenerated electron-hole pairs because of the heterojunction build-up between g-C3N4 and BiOCl. © W. S. Maney & Son Ltd 2015.
Cheng Y.,Ningbo Dahongying University
Jixie Qiangdu/Journal of Mechanical Strength | Year: 2012
Active vibration isolation technology was applied in the two-stage passive vibration isolation system to improve the isolation performance. A two-stage active vibration isolation system was designed. The dynamical equations and state equations of the system were built. A control model of the active vibration isolation system based on the minimization of isolation table acceleration response was proposed. The LQR (linear quadratic regulator) control model was simulated using Matlab/Simulink toolbox. The results of simulation show that the controller possesses better isolation performance than passive system under different excitations.
Kong S.,Ningbo Dahongying University
Advanced Materials Research | Year: 2012
Image processing system to calculate the volume, real-time high and the requirements of small size, using the DSP-based processor, FPGA approach, supplemented by the processor design of a high-performance real-time image processing system, and the system In the process of image acquisition and transmission of noise, using the PCB's anti-jamming design. Practice shows that two chips using FPGA + DSP, the algorithm is divided into two parts by the FPGA and DSP processing; effectively improve the efficiency of the algorithm. System real-time high, adaptability, real-time image acquisition system can meet the design requirements. © (2012) Trans Tech Publications, Switzerland.
Zhang W.,Ningbo Dahongying University
International Journal of Mining Science and Technology | Year: 2013
In order to preferably identify infrared image of refuge chamber, reduce image noises of refuge chamber and retain more image details, we propose the method of combining two-dimensional discrete wavelet transform and bilateral denoising. First, the wavelet transform is adopted to decompose the image of refuge chamber, of which low frequency component remains unchanged. Then, three high-frequency components are treated by bilateral filtering, and the image is reconstructed. The result shows that the combination of bilateral filtering and wavelet transform for image denoising can better retain the details which are included in the image, while providing better visual effect. This is superior to using either bilateral filtering or wavelet transform alone. It is useful for perfecting emergency refuge system of coal mines. © 2013 Published by Elsevier B.V. on behalf of China University of Mining & Technology.
Tang X.,Ningbo Dahongying University
International Journal of Online Engineering | Year: 2013
Talent resource is the primary resource. There are two sides as the starting point and foothold in this paper. One is how to evaluate the performance of science and technology talents flow by IDSS (Intelligence Decision Supporting System). Another is how to guide the innovation work of science and technology according to the evaluation results. The evaluation index on performance system has hierarchical structure. So AHP (Analytic Hierarchy Process) is applied to evaluate the performance. Evaluation model is established and illustrated by the cases in this paper. It can be seen that the flow of performance is influenced by the growth rate of important scientific and technological achievements. Furthermore, some constructive suggestions are given based on the results of evaluation.