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2nd International Conference on Mechanical engineering, Industrial Electronics and Informatization, MEIEI 2013

作者： Li, Xiao Yi Xu, Zhao Di Chou, Wan Xi School of Mathematics and System Science Shenyang Normal University Shenyang 110034 China School of Civil Engineering and Architecture Anhui University of Science and Technology Huainan Anhu 232001 China

ISBN: (纸本)9783037858905

This paper proposed the basic idea of constructing method of large v order Steiner four elements large set under the blow of steiner three elements. At the same, this paper analyzed the conditions for the existence of v order Steiner four elements. This paper also proposed the construction method of v order Steiner four elements large set based on the initial block matrix permutation. This paper also introduced the entire construction process of 9 order Steiner four elements systems large set. This paper proved the number of 9 order Steiner four elements S(1) (9) of 9 order Steiner four elements large set is d(9) = v - 8 = 1. © (2013) Trans Tech Publications, Switzerland.

关键词： Mechanics

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Influence of cavity on scattering of wave field in half space saturated soil using boundary element method

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Gongcheng Lixue/engineering Mechanics 2013年第12期30卷 228-235+254页

作者： Zhang, Hong Gao, Qian Xu, Bin Xu, Man-Qing School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China School of Civil Engineering and Architecture Nanchang Institute of Technology Nanchang Jiangxi 330099 China

This paper establishes the boundary element integral equation describing the influence of cavity on wave-field scattering in semi-unlimited saturated soil, based on Biot's theory of saturated soil and boundary features of cavity. By introducing the potential function and Betti's reciprocal theory, the singularity of the boundary integral equation was discussed. The effect of saturated soil features and incidence wave field on dynamic stress concentration and pore pressure concentration coefficient was analyzed. The correctness of the algorithm was validated by comparing the values acquired in this study with known literature results. The numerical result indicates that the coupling degree between fluid and solid in saturated soil as well as compression and permeability have great influences on wave-field scattering. As the coupling degrees of the fluid and solid phases in saturated soil increase, the dynamic stress concentration coefficient increases and the cavity scattering effect is strengthened. As the compression of saturated soil decreases, the dynamic stress concentration coefficient increases. As the permeability of saturated soil decreases, the dynamic stress concentration coefficient and pore pressure increase.

关键词： Pore pressure

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Dynamic spherical cavity expansion model and its application in an earth penetrating tandem warhead

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Binggong Xuebao/Acta Armamentarii 2013年第SUPPL.1期34卷 273-279页

作者： Wen, He-Ming Guo, Xiao-Jun Department of Modern Mechanics University of Science and Technology of China Hefei 230027 Anhui China School of Civil Engineering and Architecture Nanchang Hangkong University Nanchang 330063 Jiangxi China

A dynamic spherical cavity expansion model with the diameter of initial cavity being nonzero is developed. The shear dilatancy and compressibility of the concrete-like materials in comminuted region are considered by introducing a dilatant-kinematic relation. An analytical model based on the spherical cavity expansion theory is then proposed to analyze the penetration of follow-through bomb (FTB) into concrete target with pre-drilled holes, and an earth penetrating tandem warhead is finally optimized in order to achieve its best penetration performance. It is shown that the radial stress on the cavity surface is basically a function of material properties and cavity expansion velocity and is independent of the intial cavity radius. It is also shown that, for a given FTB and impact velocity, the optimized penetration of earth penetrating tandem warhead can be achieved by selecting a proper ratio of follow-through bomb (FTB) diameter to forward-shaped charge diameter.

关键词： Expansion

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A construction method of large v order Steiner four elements large set

A construction method of large v order Steiner four elements...

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2013 2nd International Conference on Mechanical engineering,Industrial Electronics and Informatization(MEIEI 2013)

作者： Xiaoyi Li Zhaodi Xu Wanxi Chou School of Mathematics and System Science Shenyang Normal University School of Civil Engineering and Architecture Anhui University of Science and Technology

This paper proposed the basic idea of constructing method of large v order Steiner four elements large set under the blow of steiner three *** the same,this paper analyzed the conditions for the existence of v order Steiner four *** paper also proposed the construction method of v order Steiner four elements large set based on the initial block matrix *** paper also introduced the entire construction process of 9 order Steiner four elements systems large *** paper proved the number of 9 order Steiner four elements S（9） of 9 order Steiner four elements large set is d（9）= v-8 = 1.

关键词： Steiner Four Elements System Large Set Structure Matrix Block

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Research on evaluation principle and method for green building

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2012 2nd International Conference on Green Building, Materials and civil engineering, GBMCE 2012

作者： Yan, Bing College of Civil Engineering and Architecture JiangXi Scienci and Technology Normal University JiangXi China

ISBN: (纸本)9783037854662

The architecture of green building is a complex system engineering, it urgently need to build the green building evaluation tools as technical support for operation, and make the multi-level partners who participated in the construction process form the consensus. At present, some related evaluation system has been used for this, but they are not quite suitable for the related factors in building practice activity. Several key problems involved in the construction of green building evaluation tools must hold, such as the evaluation definition, the evaluation purpose, the structure frame, the evaluation scope, the operation index, etc. This paper point out the evaluation tool must have a clear goal for the behavior that would use it or use it as the ultimate objective. The evaluation tool should be concise, seize those important factors, and make its level in order, and finally build the green architecture evaluation system that is consistent with their requirement. © (2012) Trans Tech Publications, Switzerland.

关键词： architecture

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Numerical stimulation method of chloride concentration in the concrete structure exposed to chloride aggressive environment

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2012 2nd International Conference on Green Building, Materials and civil engineering, GBMCE 2012

作者： Huang, Ying Wei, Jun Dong, Rongzhen Yan, Huihuang School of Civil Engineering Central South University Changsha 410075 China College of Architecture and Civil Engineering Jiangxi Science and Technology Normal University Jiangxi 330013 China

ISBN: (纸本)9783037854662

In this paper, based on the similarity between chloride diffusion equation in concrete and heat conduction equation the thermal analysis module of the ANSYS finite element software was used to carry out the numerical simulation for chloride ion diffusion process in concrete. And the numerical results were compared with the analytical solutions of chloride diffusion equation, which showed that the method is effective for the chloride diffusion analysis. Time-dependence of chloride diffusion coefficient in concrete was considered by amending the chloride diffusion coefficient with various parameters. Finally it is a feasible method that the chloride ion concentration in concrete structures was calculated by thermal analysis module of the ANSYS. © (2012) Trans Tech Publications, Switzerland.

关键词： Thermoanalysis

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Influence of explosion parameters on wavelet packet frequency band energy distribution of blast vibration

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Journal of Central South university 2012年第9期19卷 2674-2680页

作者：中国生敖丽萍赵奎 Department of Architecture and Civil Engineering Huizhou University School of Resources and Environmental Engineering Jiangxi University of Science and Technology School of Civil and Transportation South China University of Technology

Blast vibration analysis is one of the important foundations for studying the control technology of blast vibration damage. According to blast vibration live data that have been collected and the characteristics of short-time non-stationary random signals, the wavelet packet energy spectrum analysis for blast vibration signal has made by wavelet packet analysis technology and the signals were measured under different explosion parameters （the maximal section dose, the distance of blast source to measuring point and the section number of millisecond detonator）. The results show that more than 95% frequency band energy of the signals sl-s8 concentrates at 0-200 Hz and the main vibration frequency bands of the signals sl-s8 are 70.313-125, 46.875-93.75, 15.625-93.75, 0-62.5, 42.969-125, 15.625-82.031, 7.813-62.5 and 0-62.5 Hz. Energy distributions for different frequency bands of blast vibration signal are obtained and the characteristics of energy distributions for blast vibration signal measured under different explosion parameters are analyzed. From blast vibration signal energy, the decreasing law of blast seismic waves measured under different explosion parameters was studied and the wavelet packet analysis is an effective means for studying seismic effect induced by blast.

关键词： blast vibration wavelet packet analysis explosion parameter energy distribution

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A MAPLE PACKAGE OF AUTOMATED DERIVATION OF HOMOTOPY ANALYSIS SOLUTION FOR PERIODIC NONLINEAR OSCILLATIONS

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Journal of Systems science & Complexity 2012年第3期25卷 594-616页

作者： Yinping LIU Shijun LIAO Zhibin LI Department of Computer Science and Technology East China Normal University State Key Lab of Ocean Engineering School of Naval ArchitectureOcean and Civil EngineeringDepartment of MathematicsShanghai Jiaotong University Department of Computer Science East China Normal University

Based on the homotopy analysis method, a general analytic technique for strongly nonlinear problems, a Maple package of automated derivation （ADHO） for periodic nonlinear oscillation systems is presented. This Maple package is valid for periodic oscillation systems in rather general, and can automatically deliver the accurate approximations of the frequency co and the mean of motion δof a nonlinear periodic oscillator. Based on the homotopy analysis method which is valid even for highly nonlinear problems, this Maple package can give accurate approximate expressions even for nonlinear oscillation systems with strong nonlinearity. Besides, the package is user-friendly： One just needs to input a governing equation and initial conditions, and then gets satisfied analytic approximations in few seconds. Several different types of examples are given in this paper to illustrate the validity of this Maple package. Such kind of package provides us a helpful and easy-to-use tool in science and engineering to analyze periodic of this Maple package from the is published publicly. nonlinear oscillations. And it is free address http：//*** to download the electronic version ***/*** once the paper

关键词： Automated derivation homotopy analysis method homotopy Pade technique nonlinear oscillation Wu＇s elimination method.

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Design and Construct for Non-isomorphism Block

Design and Construct for Non-isomorphism Block

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2012 2nd lnternational Conference on Materials engineering for Advanced Technologies (ICMEAT 2012)

作者： Xu Zhao-di Li Xiao-yi Chou Wan-xi School of Mathematics and Systems Science Shenyang Normal University School of Civil Engineering and Architecture Anhui University of Science and Technology

ISBN: (纸本)9783037855874

This paper clarifies the basic idea of design and construct for non-isomorphism *** method of using standard edge matrix to structure block design is proposed,the whole process to design and construct(14,8,7,4,3) and(18,9,8,4,3) is *** uses the side of each column of the standard edge matrix exactly,and also constitutes a complete graph by arranging the edge of complete graph to the initial matrix and re-arranging it to the standard edge *** to the set of edge in standard edge matrix,14 blocks of designing(14,8,7,4,3) and 18 blocks of designing(18,9,8,4,3) are ***,it proved the number of design non-isomorphism(14,8,7,4,3) is 5,and(14,8,7,4,3) is 1.

关键词： Non-isomorphism Design Construction Edge matrix Recombinant DNA Edge of a figure or solid edges matrices Fourteen

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Research on the assessment of HJ-1A NDVI accuracy

Research on the assessment of HJ-1A NDVI accuracy

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2012 International Conference on Measurement, Information and Control, MIC 2012

作者： Li, Xiao-Lei Liu, Rui School of Civil Engineering and Architecture Chongqing University of Science and Technology Chongqing 401331 China College of Geographical Science Chongqing Normal University Chongqing 400047 China Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China

ISBN: (纸本)9781457716027

The Chinese HJ satellites CCD sensor is similar to Landsat-5 TM with the same spatial resolution, but have enormous advantages in space coverage and frequency of repeated observations. This paper focuses on the reflectance and NDVI evaluation of the HJ-1A CCD, the conclusions including: There's no obvious difference between the CCD1 and CCD2, but among the 4 bands, blue band shows a relatively worse quality, red and infrared red shows the best quality. The NDVI extracted from HJ CCD shows excellent accuracy compared to Landsat TM, which means a widely applicability, but there's large error appears in water body NDVI of HJ CCD and should pay attention. HJ CCD sensors have much broader applicability due to its distinct advantage in space coverage and time resolution. © 2012 IEEE.

关键词： Remote sensing

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