Li X.-Y.,Ningbo Dahongying University
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2016
The Ni-TiN coatings were deposited on the surface of T8 steel by ultrasonic pulse electrodeposition method. The micro-structures of the coatings were observed by scanning electron microscope and X-ray diffraction, and an AR model was established to predict the TiN particle composite in the coatings. The analysis shows that when the current density of 4 A/dm2, duty cycle 50%, ultrasonic power 140 W, the Ni-TiN composite coating surface was relatively smooth, the grain was small, and the organization was more uniform. XRD analysis shows that the Ni and TiN phases existed in the Ni-TiN composite coatings. The diffraction peaks of nickel grains are located at 44.8°, 52.2° and 76.8°, respectively. And the diffraction peaks of TiN are located at 38.5°, 42.8° and 66.5°, respectively. The TiN particles of Ni-TiN composite coating were predicted perfectly by the AR model, the relative error of the maximum value and the minimum value was 2.43% and 0.71%, respectively. © 2016, Chinese Ceramic Society. All right reserved.
Xiong Y.Y.,Ningbo Dahongying University |
Wu Y.Y.,Ningbo Dahongying University
Applied Mechanics and Materials | Year: 2014
Resource schedule Strategy is the core technology of cloud computing. PSO algorithm is one of dynamic adaptation resource scheduling algorithms to cloud computing. The virtual machines and the hosts can be scheduled reasonable by adjusting parameters. The resource can be scheduled quickly because of the dynamic trend calculation of PSO algorithm, to ensure real-time of the Cloud Calculation. © (2014) Trans Tech Publications, Switzerland.
Ming W.,Ningbo Dahongying University
ICCSE 2016 - 11th International Conference on Computer Science and Education | Year: 2016
In this paper a node localization algorithm for estimating unknown node positions in wireless sensor networks is presented. The proposed algorithm is based on the distributed clustering of anchor-free nodes. In the absence of anchor nodes, clusters of these sensors are formed and relevant angular and distance measurements are taken. This is followed by two phases of nodes synchronization, in which gradual adjustments of orientation and coordinates are performed utilizing a technique similar to the time synchronization. As the final synchronization process converges, clusters coordinates are merged into a unified global coordinate system, thus completing the node localization task. Experiments show that, in the case of randomly distributed nodes, the proposed algorithm achieves good performance in the areas of improved network coverage, minimized positioning error rate, and reduced communication overhead. Data show an improvement of 51.3% in network coverage in comparison to other industry-leading clustering algorithms. In addition, when the network node density is greater than 0.9, positioning error rate is reduced by an average of 22.3%. © 2016 IEEE.
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.
Jin S.,Ningbo Dahongying University
ICCSE 2012 - Proceedings of 2012 7th International Conference on Computer Science and Education | Year: 2012
For the lack of an effective online learning management platform to help IT teachers to complete the task of teaching in High School Information Technology Course, it can not diversify student learning outcomes assessment of the status quo, this essay's major research objective is to establish high school Moodle platform of information technology, take the advantage of the structure of moodle platform, make integrated use of Moodle site management, user management, course management, task modules, chat room module, selecting module, forum module, logging module, test module for the effective completion of High School Information Technology teaching tasks. In the curriculum implementation process, by means of Moodle forum module, grouping module and test module and so on, to realize a comprehensive assessment of student learning outcomes. Moodle is verified through the practical application of information technology platform. It is an effective interactive learning platform among the high school curriculum, therefore students high-quality learning can be achieved. © 2012 IEEE.
Zhang W.,Ningbo Dahongying University
International Journal of Bifurcation and Chaos | Year: 2015
A modularized design for the radio frequency (RF) link in automatic test system of multimode mobile communication base station is presented, considering also the characteristics of wireless communication indices and composition of signals of base stations. The test link is divided into general module, time division duplex (TDD) module, module of spurious noise filter, module of downlink intermodulation, module of uplink intermodulation and uplink block module. The composition of modules and link functions are defined, and the interfaces of the general module and the module of spurious noise filter are described. Finally, the estimated gain budget of the test link is presented. It is verified by experiments that the system is reliable and the test efficiency is improved. © 2015 World Scientific Publishing Company.
Linge W.,Ningbo Dahongying University
Proceedings - 4th International Conference on Intelligent Computation Technology and Automation, ICICTA 2011 | Year: 2011
Nowadays most of the wireless sensor network management modes have a shorter lifetime because adopting the way of transferring management information to each other, which thus consuming energy too fast. This paper is aimed at making use of mobile and computerized characteristics of the mobile agent and considering the capacity factors to establish wireless sensor network management model with low consumption. Through improving LEACH algorithm, we can set up cluster-heads of mobile agent, and through comprehensively applying hybrid algorithm combination of GA and PSO, we can optimize the mobile agent path, and improve the quality of solution and accelerate algorithm convergence. The reduction of power consumption of wireless sensor can have remarkable effects especially on the network arrangement of large wireless sensor. © 2011 IEEE.
Suran K.,Ningbo Dahongying University
Journal of Multimedia | Year: 2013
Since the angular deviation produced when shooting a QR code image by a camera would cause geometric distortion of the QR code image, the traditional algorithm of QR code image correction would produce distortion. Therefore this paper puts forward the algorithm which combines corner detection with convex hull algorithm. Firstly, binaryzation of the collected QR code image with uneven light is obtained by the methods of local threshold and mathematical morphology. Next, the outline of the QR code and the dots on it are found and the distorted image is recovered by perspective collineation, according to the algorithm raised by this paper. Finally, experimental verification is made that the algorithm raised by this paper can correctly find the four apexes of QR code and achieves good effects of geometric correction. It will also significantly increase the recognition rate of seriously distorted QR code images. © 2013 Academy Publisher.