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  • Trans Tech Publications, Ltd.  (545)
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  • Trans Tech Publications, Ltd.  (545)
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  • 1
    Online Resource
    Online Resource
    Preparation of Phosphorus by Carbothermal Reduction Mechanism in Vacuum
    Trans Tech Publications, Ltd. ; 2011
    In:  Advanced Materials Research Vol. 361-363 ( 2011-10), p. 268-274
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 361-363 ( 2011-10), p. 268-274
    Abstract: The purpose of this work was to investigated the carbothermic reaction of fluorapatite process by the means of thermodynamics analyses, XRD and element analysis, respectively. Thermodynamic calculations indicated that phosphorus can be prepared by heating the mixture of Ca 5 (PO 4 ) 3 F 2 and C at 1173K under the system pressure of 100Pa. CO cannot react with Ca 5 (PO 4 ) 3 F 2 in the carbothermic reduction process at 973-1873K and 100Pa. Experimental results demonstrated that phosphorus can be produced by the reaction between Ca 5 (PO 4 ) 3 F 2 and C, the main reaction phase is P 2 (g), CO(g), CaO and CaF 2 , and with increasing temperature, the greater degree of response. The best technology conditions, the molar ratio of Ca 5 (PO 4 ) 3 F 2 to C is 1:7.5 at 1723K for 1h when the system pressure was about 100Pa. This study to provide experimental evidence for preparation of phosphorus by carbothermal reaction of fluorapatite in vacuum.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.361-363
    DOI: 10.4028/www.scientific.net/AMR.361-363.268
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2011
    detail.hit.zdb_id: 2265002-7
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  • 2
    Online Resource
    Online Resource
    A Sort of Fuzzy Intelligence Control Strategy for Complex System
    Trans Tech Publications, Ltd. ; 2011
    In:  Advanced Materials Research Vol. 187 ( 2011-2), p. 169-174
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 187 ( 2011-2), p. 169-174
    Abstract: For complex controlled object with the large time delay link, it was difficult to get effective control effect by means of traditional fuzzy control algorithm. Aimed at enhancing the control quality in control precision and so on for complex system, the paper proposed a sort of fuzzy intelligence control strategy. It fused the expert control experience combing with human simulated intelligence control, designed the control rule, proposed the mode of running controller and explored the principle of parameter calibrating layer. The system simulation experiment explained that the control effect was much better than optimal PID control in dynamic and steady quality. The results show that the fuzzy intelligent control strategy is reasonable and feasible, high in control precision, better in dynamical and steady control effect, and it represents very strong robustness.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.187
    DOI: 10.4028/www.scientific.net/AMR.187.169
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2011
    detail.hit.zdb_id: 2265002-7
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  • 3
    Online Resource
    Online Resource
    Application of Genetic Algorithms in the Optimization of the Drilling Path on the Printed Circuit Board
    Trans Tech Publications, Ltd. ; 2011
    In:  Advanced Materials Research Vol. 187 ( 2011-2), p. 133-138
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 187 ( 2011-2), p. 133-138
    Abstract: Efficient production of PCB is the electronic industry’s needs, while drilling is an important part in the printed circuit board manufacturing process. The drilling path optimization is crucial for improving the efficiency. Inspired by the shortest path algorithm, this paper used genetic algorithm for solving the shortest to optimal path selection of PCB drilling process and find the best path according to the specific circumstances of PCB drilling to achieve high efficiency drilling. The algorithm which has been used in the different points for practice is proved to be reasonable and efficient. The method can be optimized for fast global search, greatly reducing the computation, it is robust, efficient, can be a good solution for PCB drilling path optimization problem.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.187
    DOI: 10.4028/www.scientific.net/AMR.187.133
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2011
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  • 4
    Online Resource
    Online Resource
    On Pretreatment Experimental Study of Yunnan Phosphorus Building Gypsum
    Trans Tech Publications, Ltd. ; 2014
    In:  Advanced Materials Research Vol. 1025-1026 ( 2014-9), p. 837-841
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 1025-1026 ( 2014-9), p. 837-841
    Abstract: This paper studied effect of different pretreatment process on Yunnan phosphorus building gypsum strength and crystal morphology such as washing method, lime neutralization method, flotation method and Hans method. A lots experiment result indicated that basic properties of phosphorus building gypsum of different pretreatment methods could satisfy related building materials products technology requirements. While inorganic impurities could be effectively removed by lime neutralization method and washing method, as well as organics could be better removed by flotation method, however, compared with other methods, the Hans method possessed the best effect about removing soluble phosphorus, fluorine and organic compounds in phosphogypsum , and had other benefit such as low cost, easy operated and high strength.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.1025-1026
    DOI: 10.4028/www.scientific.net/AMR.1025-1026.837
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2014
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  • 5
    Online Resource
    Online Resource
    Modularization Technology Development Prospects
    Trans Tech Publications, Ltd. ; 2014
    In:  Applied Mechanics and Materials Vol. 509 ( 2014-2), p. 92-95
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 509 ( 2014-2), p. 92-95
    Abstract: Describes the historical background of modular construction technology, focusing on the development of power from a modular, development history, comparative advantages and disadvantages of other aspects of the study was to investigate, and thus the modularization of the prospect.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.509
    DOI: 10.4028/www.scientific.net/AMM.509.92
    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
    On Experimental Study of Activation Coal Gangue-Portland Cement by Microwave Technology
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 838-841 ( 2013-11), p. 2658-2662
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 838-841 ( 2013-11), p. 2658-2662
    Abstract: Added appropriate amount of microwave activation coal gangue intoⅠ42.5 Portland cement, there were not negative influence to Portland cement properties such as fineness, setting time, volume stability, pozzolan activity, strength by physical and mechanical experiments and scanning electron microscopy (SEM) ; though there was micro expansion during hydration and hardening process, the volume stability of microwave activation coal gangue cement mixtures also could satisfy relevant state technology standards; compare to tradition thermal activation coal gangue, microwave activation coal gangue could be changed better cement additives, and could more remarkable reduce product cost and save energy.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.838-841
    DOI: 10.4028/www.scientific.net/AMR.838-841.2658
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
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  • 7
    Online Resource
    Online Resource
    The Influence of 40 Hz Electromagnetic Wave Induce Phase-Synchronization on Brain
    Trans Tech Publications, Ltd. ; 2013
    In:  Applied Mechanics and Materials Vol. 311 ( 2013-2), p. 491-496
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 311 ( 2013-2), p. 491-496
    Abstract: Auditory phase-synchronization near 40Hz is reportedly related to sensory stimulation. This study applied the phase synchrony analysis and Bi-coherence analyses to analyze the electroencephalographic measurements. Four experimental stages were conducted with 34 healthy high school students to collect the data: (A) resting with eyes closed, (B) listening to the classical music, (C) resting with eyes closed, and (D) listening to popular music. The result shows that the whole brain phase-synchronization occurs at 40Hz and lasts about 400 ms, which is quite different from the estimated 40Hz phase-coupling lasting about 20–25 ms in previous studies and seems to play an important role in inducing auditory attention loss. Additionally, the result also shows that hypersynchronous states may affect perceptual processing. This study develops an original nonlinear time serial analytical approach and suggests that 40Hz phase-synchronization might be an important indicator in perceptual process.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.311
    DOI: 10.4028/www.scientific.net/AMM.311.491
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2251882-4
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  • 8
    Online Resource
    Online Resource
    Effect of Inter-Rod Coupling on 1-3 Piezocomposite High-Power Ultrasonic Transducers
    Trans Tech Publications, Ltd. ; 2012
    In:  Advanced Materials Research Vol. 476-478 ( 2012-2), p. 2105-2108
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 476-478 ( 2012-2), p. 2105-2108
    Abstract: Efficiency is a critical performance for a high-power ultrasonic transducer composed of 1-3 piezocomposites and geometric parameters of the composites can influence the efficiency of the transducer. The effect of inter-rod responses in the composite matrix on the efficiency was experimentally investigated in this study. For analyses, four PZT4-epoxy composite ultrasonic transducers with various volume fractions and inter-rod spacing were fabricated in-house. The experimental results demonstrated that the inter-rod coupling of the 0.1-mm spacing could significantly degrade the efficiency of the composite probe at about 1.0 MHz resonance since the 0.1-mm spacing between PZT4 rods was so small as to cause a high interference. At the same volume fraction, the transducer engineer should take the inter-rod coupling into account for the design of the high-power ultrasonic transducer.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.476-478
    DOI: 10.4028/www.scientific.net/AMR.476-478.2105
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2012
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  • 9
    Online Resource
    Online Resource
    Evaluation of Sound Absorption Capability from PET Mesh to PET/PU Composite Board
    Trans Tech Publications, Ltd. ; 2014
    In:  Advanced Materials Research Vol. 936 ( 2014-6), p. 1994-1998
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 936 ( 2014-6), p. 1994-1998
    Abstract: This article completely investigates from nonwoven to PET/PU composite board on the variations of absorption coefficient by using standard impedance tube with four microphones. Recently, PET/PU composite board is becoming a popular and functional material because of the high flexibility in the abilities, such as thermal protection, chemical-proof, acoustic-resistance and etc.. Thus, it is important to realize the variations of absorption capability from single material to complete composite material, and can feedback some suggestions to the designer. Results shows that nonwoven only has a stable increase in absorption coefficient with the frequencies because of the inherent porous characteristics. With the substantial properties, foam has lower absorption coefficient and two peaks occurring in the higher frequencies. These both peaks are caused by the resonance between wave and foam at specified frequency. With an additional nonwoven in the rear side of composite foam, absorption coefficient of PET/PU composite board will effectively increase. Based on the diverse applications, absorption coefficient of PET/PU composite board can be flexible modulated to consistent with the requirements.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.936
    DOI: 10.4028/www.scientific.net/AMR.936.1994
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2014
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  • 10
    Online Resource
    Online Resource
    Seismic Response of a Hill in Wenxian, Gansu, Observed from Aftershocks of 2008 Wenchuan Earthquake
    Trans Tech Publications, Ltd. ; 2011
    In:  Advanced Materials Research Vol. 243-249 ( 2011-5), p. 3952-3957
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 243-249 ( 2011-5), p. 3952-3957
    Abstract: To help understand the ground motions of the topographic site, the workers of Seismic Bureau of Gansu province deployed a temporary array of seismometers around the Wenxian hill and recorded ground motions from Wenchuan aftershocks. Only 11 aftershocks were recorded on all stations across the hill, these data were collected to facilitate studies of site response, wave propagation effect, and correlations of mainshock damage with local site conditions. In this paper, we analyze the weak motion data as well as the strong-motion data, and conduct comparisons of peak ground accelerations, seismic spectra analysis, and spectral ratio analysis. A more complete description of the site’s amplification, its relationship to topography, and its relationship to earthquake source effects are provided. The result shows that the ground motion was consistently amplified at station at or near the top of the hill compared with stations at the base of the hill and the amplifications frequency dependent and has its maximum at the resonant frequency of the site.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.243-249
    DOI: 10.4028/www.scientific.net/AMR.243-249.3952
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2011
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