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  • Trans Tech Publications, Ltd.  (26)
  • Xu, Jun  (26)
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  • Trans Tech Publications, Ltd.  (26)
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  • 1
    Online Resource
    Online Resource
    An Efficient Adaptive Wolf Pack Search Algorithm
    Trans Tech Publications, Ltd. ; 2014
    In:  Applied Mechanics and Materials Vol. 590 ( 2014-6), p. 702-709
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 590 ( 2014-6), p. 702-709
    Abstract: In this paper, an improved wolf colony algorithm (WCA), named as efficient adaptive wolf pack search (EAWPS) algorithm was proposed. EAWPS adopts population manager strategy, adaptive sharing factor and boundary condition to avoid falling into the local minimum and to significantly improve the efficiency of WCA. The efficacy of EAWPS is compared with the original WCA and the standard PSO on six benchmark functions, the experimental results demonstrate that the proposed algorithm has a superior performance in both speed and accuracy.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.590
    DOI: 10.4028/www.scientific.net/AMM.590.702
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2014
    detail.hit.zdb_id: 2251882-4
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Application of Modbus Protocol in the Automatic Safety Device
    Trans Tech Publications, Ltd. ; 2014
    In:  Advanced Materials Research Vol. 1070-1072 ( 2014-12), p. 765-769
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 1070-1072 ( 2014-12), p. 765-769
    Abstract: The traditional HMI ( human-machine interface ) of automatic safety device is lack of beauty and friendship. With the development of smart grid, there are more and more high requirements of the HMI. The automatic safety device was divided into the HMI module and the device main body. An industrial touch screen which supports for Modbus protocol, was selected as the HMI module of the automatic safety device. The HMI data was extracted into the standard data of Modbus protocol, and mapped to the unified address space of Modbus protocol. Modbus RTU mode was used to achieve the data communication between the HMI module and the device main body. This method not only makes the display content richer, interface more user-friendly, but also makes the product development cycle shorter and the product more scalable.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.1070-1072
    DOI: 10.4028/www.scientific.net/AMR.1070-1072.765
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2014
    detail.hit.zdb_id: 2265002-7
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  • 3
    Online Resource
    Online Resource
    3-D Modeling the Magnetic Field due to Ocean Tidal Flow O1
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 658 ( 2013-1), p. 471-474
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 658 ( 2013-1), p. 471-474
    Abstract: The tidal motion of the ocean water through the ambient magnetic field, generates secondary electric and magnetic field. The magnetic fields generated by the diurnal (O1) ocean flow can be clearly detected. We simulate the magnetic signals for tidal constituents –diurnal (O1) tides. The idea of exploiting tidal signals for EM studies of the Earth is not new, but so far it was used only for interpretation of inland and transoceanic magnetic field data due to O1. Emphasis in this work is made on a discussion of sea bottom electric field of the same origin.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.658
    DOI: 10.4028/www.scientific.net/AMR.658.471
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2265002-7
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  • 4
    Online Resource
    Online Resource
    CCPSO Based on PCA for Large-Scale Optimization Problem
    Trans Tech Publications, Ltd. ; 2012
    In:  Applied Mechanics and Materials Vol. 236-237 ( 2012-11), p. 1190-1194
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 236-237 ( 2012-11), p. 1190-1194
    Abstract: This paper proposed a cooperative coevolving particle swarm optimization base on principal component analysis (PCA-CCPSO) algorithm for large-scale and complex problem. In this algorithm, PCA are used to pick up the available particles which gathered the important information of the initialized particles for CCPSO. The Cauchy and Gaussian distributions are used to update the position of the particles and the coevolving subcomponent size of the particles is determined dynamically. The experimental results demonstrate that the convergence speed of PCA-CCPSO is faster than that of CCPSO in solving the large-scale and complex multimodal optimization problems.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.236-237
    DOI: 10.4028/www.scientific.net/AMM.236-237.1190
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2012
    detail.hit.zdb_id: 2251882-4
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  • 5
    Online Resource
    Online Resource
    Optimization the Arrangement of Power Cable Lines in Tunnel
    Trans Tech Publications, Ltd. ; 2014
    In:  Applied Mechanics and Materials Vol. 678 ( 2014-10), p. 513-517
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 678 ( 2014-10), p. 513-517
    Abstract: In order to optimized the power cable layout design in tunnel, and improved the operation ability of the cable line, this paper analyzed the cable rating and the short-circuit force under different arrangements. 220kV cable circuit was simulated in the tunnel with conditions of the flat and the trefoil arrangements. The temperature and the rating of the 220kV cable under the condition of the two arrangements were calculated in this paper. The short circuit force peak value and its direction of the cable line under short circuit current of 50kA under the condition of the two arrangements were simulated in this paper. The results show that, the cable rating in flat arrangement is better than in trefoil formation. The value and the direction of the short circuit force in tunnel are better in flat arrangement than in trefoil formation. So it is suggested that the flat arrangement is preferred when conditions permit.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.678
    DOI: 10.4028/www.scientific.net/AMM.678.513
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2014
    detail.hit.zdb_id: 2251882-4
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  • 6
    Online Resource
    Online Resource
    Al-Si-Mg-Cu Heat Storage Alloys and their Heat Storage Properties
    Trans Tech Publications, Ltd. ; 2013
    In:  Materials Science Forum Vol. 743-744 ( 2013-1), p. 24-28
    Details
    In: Materials Science Forum, Trans Tech Publications, Ltd., Vol. 743-744 ( 2013-1), p. 24-28
    Abstract: The problems such as poor oxidation resistant properties at high temperatures and abated thermal storage capacities after repeated thermal cycles still exist in heat storage alloys. In order to alleviate these problems, orthogonal experiment was used to design nine Al-Si-Mg-Cu alloys in this work. An SII TG/DTA6300 differential thermal analyzer was used to determine the heat storage properties of these alloys. After integrating a series of factors, Al-12Si-2Mg-15Cu alloy was selected as the heat storage alloy. The oxidation test of this alloy at the temperature of 650 °C for 300 h was carried out, and the oxidation kinetics curve was obtained. The results showed that the oxide film was of good protection. This alloy exhibited a good thermal stability in view of the latent heat of fusion decreased 3.53%, the initial phase transition temperature decreased 0.1 °C, and terminated phase transition temperature increased 3.1 °C after 150 times of thermal cycles. The photomicrograph was used to discuss the reasons of the performance changes of this alloy.
    Type of Medium: Online Resource
    ISSN: 1662-9752
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/MSF.743-744
    DOI: 10.4028/www.scientific.net/MSF.743-744.24
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2047372-2
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  • 7
    Online Resource
    Online Resource
    Effect of Annular Electromagnetic Stirring Process on Solidification Microstructure of 7075 Aluminium Alloy
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 652-654 ( 2013-1), p. 2418-2426
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 652-654 ( 2013-1), p. 2418-2426
    Abstract: 7075 aluminum alloy melt conditioned by annular electromagnetic stirring(A-EMS) was cast in the TP1 mould, and the effects of pouring temperature, stirring current, stirring frequency and annular gap width on microstructures were analyzed. The A-EMS process exhibits superior grain refinement and remarkable structure homogeneity compared with conventional casting(N-EMS) and conventional electromagnetic stirring casting(EMS). With the increasing of the pouring temperature, the microstructures of the sample conditioned by A-EMS are inclined to become coarse and non-uniform compared with which have the more serious inclination conditioned by N-EMS. With the stirring current or stirring frequency increasing, the rosette-like or dendritic primary α(Al) phase decreases significantly on the sample microstructures, and the non-dendritic primary α(Al) phase is finer and more spherical. Narrow annular gap is advantageous to obtain uniformly fine spherical solidification microstructures.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.652-654
    DOI: 10.4028/www.scientific.net/AMR.652-654.2418
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2265002-7
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  • 8
    Online Resource
    Online Resource
    Lapping and Polishing of Sapphire Wafer with Fixed Abrasive Pad
    Trans Tech Publications, Ltd. ; 2014
    In:  Advanced Materials Research Vol. 1027 ( 2014-10), p. 68-71
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 1027 ( 2014-10), p. 68-71
    Abstract: The processing technology of sapphire with a high material removal rate a good surface quality is critical for its applications. The experiment of sapphire lapping and polishing was carried out by using three different fixed abrasive pad (FAP). Their material removal rate (MRR) and surface roughness (Ra) were measured and analyzed. Results indicate that a MRR of 5.6μm/min reaches in rough lapping and a MRR of 0.4μm/min in fine lapping. The average surface roughness Ra of rough lapping and fine lapping is 142nm and 1.2nm respectively. The processing efficiency of sapphire wafer is effectively improved and a good surface quality is obtained when FAP adopted.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.1027
    DOI: 10.4028/www.scientific.net/AMR.1027.68
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2014
    detail.hit.zdb_id: 2265002-7
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  • 9
    Online Resource
    Online Resource
    Instability Analysis of Once-Through Steam Generator
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 756-759 ( 2013-9), p. 4596-4599
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 756-759 ( 2013-9), p. 4596-4599
    Abstract: Considering the characteristic of Once-Through steam generator, the simplified dynamic model with lumped parameters moving boundary is used to describe two-phase flow feedback system in this paper. The feedback system and transfer-function for instability analysis are derived from the model. The instability analysis of the system is based on the frequency-domain analysis method. The Matlab software and its simulink tools are used to analyze the instability of the system. Then the stability boundary under the effect of some major factors is obtained. The results of stability boundary are compared to the concerned experiments by frequency-domain method.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.756-759
    DOI: 10.4028/www.scientific.net/AMR.756-759.4596
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2265002-7
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  • 10
    Online Resource
    Online Resource
    Analysis of Flow Instability for OTSG in Movable Nuclear Power Devices
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 773 ( 2013-9), p. 13-18
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 773 ( 2013-9), p. 13-18
    Abstract: The instability occurring in OTSG (Once-Through Steam Generator) of movable nuclear power plants is presented by the multivariable frequency domain theory. As concerning coupling interactions of OTSG tubing, it is more efficient for analyzing the instability of OTSG compared the common single variable method. A mathematical model for the system is derived from the fundamental equations by using the perturbation, Laplace-transform and the nodalization techniques. The stable boundary and parameters which influence the stability of the system are evaluated through computer simulation.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.773
    DOI: 10.4028/www.scientific.net/AMR.773.13
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2265002-7
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