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Wei X.,Mianyang Vocational and Technical College | Li Y.,State Grid Corporation of China
World Information on Earthquake Engineering | Year: 2014

In this study and the evaluation of seismic performance of hydraulic structures, artificial seismic waves is a common input loads. This paper establishes ground motion and stochastic mathematical models, determined the basic parameters in white noise stationary process, established a relationship between design response spectrum and the power spectrum, power spectrum and amplitude spectrum, established a spectral curve by regarding random phase angle and intensity of the envelope as a parameter, using MATLAB to compile corresponding programs, with FFT transform and FFT inverse transformation to establish the relationship between the time domain and frequency domain, debugged the error gap between computing response spectrum and the design response spectrum, achieved the purpose of generating artificial ground motion, to eliminate the impact of the residual long-period component in the artificial wave, this paper use the least squares method fitting of the original average acceleration, average acceleration was used the correction of artificially vibration acceleration, corrected the drift of displacement time history. Finally to created artificially vibration as the input, calculated to a dynamic response of the engineering structure, In order to provide a meaningful reference, in basis of the seismic design of engineering. ©, 2014, Science and Technology Periodical Press. All right reserved.

Zhao T.,Mianyang Vocational and Technical College | Wang J.,China Academy of Engineering Physics
Hecheng Shuzhi Ji Suliao/China Synthetic Resin and Plastics | Year: 2015

Semi-rigid polyurethane foams (SRPUF) with good appearance and mechanical properties containing different filler contents were prepared by adding easy-biodegradable microcrystalline cellulose in polyurethane foams via molding process. Effects of the filler content on the mechanical properties of polyurethane foams were studied, and the largest filler content was determined. The results show that the largest content of microcrystalline cellulose reaches 40 phr (mass percentage of 11.7%). The tensile strength and the elongation at break of SRPUF increase with the addition of microcrystalline cellulose and reach the maximum when the filler content is 30, 10 phr respectively. The higher the filler content and the longer the degradation time is, the better degradability SRPUF has with soil burial. The mass loss of SRPUF with the largest filler content is up to 5.84% after 120 days. ©, 2015, Research Institute of Beijing. All right reserved.

Han J.,Mianyang Vocational and Technical College | Liang Y.,Southwest University of Science and Technology
Applied Mechanics and Materials | Year: 2013

The purpose of this paper is to focus on studying its flexural behavior after different damages prestressed concrete hollow slab is strengthened with CFRP.By the experimental method, twelve residential prestressed concrete hollow slabs are tested under concentrated force at the two points of the symmetrical load in order to analyze both flexural behavior and effects factored by different bonding modes.The conclusion can be drawn that the flexural behavior of prestressed concrete hollow slabs strengthened with CFRP is well-tried.It provides design suggestions and reference for prestressed concrete hollow slabs strengthened with CFRP, and also provides an experimental basis for the repairing and reinforcing practical engineering application in Wenchuan disaster area. © (2013) Trans Tech Publications, Switzerland.

Xiao Y.,Southwest University of Science and Technology | Xiao Y.,Mianyang Vocational and Technical College
Lecture Notes in Electrical Engineering | Year: 2014

Image splicing is a common method to construct forged image which decreases the authentication of the traditional image. Resizing operation is usually necessary to create a convinced forged image. Though the forged image leaves no visual clues, resizing operation using interpolation method destroys the relationship between neighboring pixels, thus leaving traces which can be captured by statistical feature. We first convert the traces left by resizing to feature and then feed features from enough sample images to support vector machines to train for detector. Finally, we use detector to determine whether the image is tampered and point out which parts of the image are tampered by block-wise method. Experimental results verify the effectiveness of our proposed method. © 2014 Springer International Publishing Switzerland.

Han J.,Mianyang Vocational and Technical College | Liang Y.,Southwest University of Science and Technology
Applied Mechanics and Materials | Year: 2014

In order to make the pressure safe, a new method and material for reinforcing pipelines is introduced, that is carbon fiber reinforced polymer sheet. In the experiment, the metal pipelines that wrapped with different layers of CFRP sheets respectively are carried loads by hydrostatic burst test. The results show that this method can be a substantial reinforcement in the bearing capacity of the metal pipelines. According to the test data and the thin wall cylinder stress calculation theory, the design formula of reinforcing layer thickness of CFRP was presented in the elastic and plastic state of metal material. Based on the plastic solution of thick wall cylinder in the polar coordinates, the strength checking formulas of repair system was presented in different mechanical states. The presented formulas without iterative calculation have practical value in the production practice. © (2014) Trans Tech Publications, Switzerland.

Wu L.,Southwest University of Science and Technology | Ning H.,Mianyang Vocational and Technical College
Journal Wuhan University of Technology, Materials Science Edition | Year: 2015

CuO-doped (Ag0.75Li0.1Na0.1K0.05)NbO3 (ALNKN-xCuO, x = 0–2mol%) lead-free piezoelectric ceramics were prepared by the solid-state reaction method in air atmosphere. The effects of CuO addition on the phase structure, microstructure, and piezoelectric properties of the ceramics were investigated. The experimental results show that the ALNKN ceramics without doping CuO possess rhombohedral phase along with K2Nb6O16-type phase and metallic silver phase. For all of the CuO-doped ALNKN ceramics, a pure perovskite structure with the orthorhombic phase was obtained by enclosing the samples in a corundum tube. A homogeneous microstructure with the grain size of about 1 μm was formed for the ceramics with 0.5mol% CuO. The grain size increases with increasing amount of CuO. The temperature dependence of dielectric properties indicates that the ferroelectric phase of the ALNKN-xCuO ceramics becomes less stable with the addition of CuO. The ceramics with x = 1mol% exhibit relatively good electrical properties along with a high Curie temperature. These results will provide a helpful guidance to preparing other AN-based ceramics by solid-state reaction method in air atmosphere. © 2015, Wuhan University of Technology and Springer-Verlag Berlin Heidelberg.

Luo T.,Mianyang Vocational and Technical College
Applied Mechanics and Materials | Year: 2014

In order to study the flexural capacity of the seismic damaged RC beams after reinforcement, the bearing capacity and ductility are comprehensively evaluated, which is based on the results of three points of division loading test on 8 models which are divided into 4 groups. Experimental results show that compared with the direct pasting CFRP, the ultimate bearing capacity of RC beam strengthened by composite CFRP sheets is much higher, the average is 20.7%. Cracking load and ductility are also improved higher. The reinforcement effect of CFRP sheets is used very well. The research results provide advice and reference for the next seismic damaged RC beams in the reinforcement engineering. © (2014) Trans Tech Publications, Switzerland.

Luo T.,Mianyang Vocational and Technical College
Applied Mechanics and Materials | Year: 2014

The mechanical behavior of RC beam strengthened with CFRP by anti-arch method and directly pasting CFRP through model test is analyzed. It explains that the reinforced RC beam with CFRP by anti-arch method can solve the influence of beam's loading by the secondary stress which exists in the method of pasting CFRP directly in strengthening RC beams improve the beam's load when it cracks and the carrying capacity, and decrease the deflection deformation and crack width and gap when the beam carries load. It can make the most use of high strength of tensile properties of CFRP. © (2014) Trans Tech Publications, Switzerland.

Wang T.,Mianyang Vocational and Technical College
Proceedings - 2014 IEEE Workshop on Advanced Research and Technology in Industry Applications, WARTIA 2014 | Year: 2014

With the development of economy and the accelerating rhythm of life, pressure of work and competition is becoming bigger and bigger. Traveling outside is an effective way to relax and plays a more and more important role in people's lives. Tourism service supply chain is built to meet the needs of tourists. The supply chain structure includes food, accommodation, travel, tour, shopping, entertainment companies (travel services provider), multilevel travel agencies (travel service integrators) and tourists. Due to the tourism product is not the physical product, compared to the traditional physical supply chain, tourism supply chain has many unique characteristics. On the basis of the analysis of tourism supply chain structure and characteristics of tourism products, selection problem of tourism products from the perspective of tourists' utility is studied, providing decision-making basis for the travel agency. © 2014 IEEE.

Zhang X.,Mianyang Vocational and Technical College
Future Communication, Information and Computer Science - Proceedings of the International Conference on Future Communication, Information and Computer Science, FCICS 2014 | Year: 2015

With the development of computer technology, the development and application of software technology are constantly updated. To effectively increase the development and application efficiency of computer software technology, software development technology was introduced. Additionally, the exploration was made from three respects: importance and methods of development, as well as its application. As a result, the development and application of software should abide by the development philosophy of being people-oriented, thus promoting usability. The innovative point of this thesis lay in an analysis on performances of different software development techniques from specific applications. Also, the people-oriented importance was analyzed as the core of software technology development and of security. © 2015 Taylor & Francis Group, London.

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