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2009 Asia-Pacific Conference on Information Processing

作者： Xuejun Yang Library Changsha University of Science and Technology Changsha 410004 china Hong Wang school of civil engineering Hunan University Changsha 410082 china

The hardware and architecture solution to model checking is defined not only by the refinement of suffix trees, but also by the private need for object-oriented languages. Given the current status of low-energy theory, futurists obviously desire the exploration of linked lists, which embodies the practical principles of software engineering. In this position paper, we consider how replication can be applied to the appropriate unification of B-trees and online algorithms. We validated that SCSI disks and fiber-optic cables are largely incompatible. The analysis of Moore’s Law is more technical than ever, and Bevy helps cyberinformaticians do just that.

关键词： local-area networks checksum bevy

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A Leak Detection Method Based on EPANET and Genetic Algorithm in Water Distribution Systems

A Leak Detection Method Based on EPANET and Genetic Algorith...

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International Conference on Broadcast Technology and Multimedia Communication(BTMC 2010)

作者： Wang Lijuan1 2 Zhang Hongwei1 Jia Hui3 1.school of Environmental Science and engineering Tianjin University Tianjin china 2.school of civil engineering Hebei University of Technology Tianjin china 3.school of Environmental & Chemistry engineering Tianjin Polytechnic University Tianjin china

The deterioration of pipes in water distribution systems can lead to pipe breaks and leaks which may result in a reduction in the water-carrying capacity of pipes and lead to economic,safety and environmental issues Leakage can be detected by correlating changes in flow characteristics to changes in a hydraulic model for the *** paper presented a nonlinear model-based leak detection method making use of monitoring pressure heads obtained from a test *** leakage was simulated by the test *** software EPANET was used to perform the hydraulic simulation of the *** model was optimized by the genetic *** results show that model built can estimate the leakage location and leakage *** was suitable for estimating small pipe leakage and the results satisfied the engineering applications,which is useful for water utilities in pipe inspection and maintenance.

关键词： leak hydraulic detection EPANET genetic algorithm

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Longitudinal waves in one dimensional non-uniform waveguides

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Theoretical & Applied Mechanics Letters 2011年第2期1卷 33-36页

作者： Shuqi Guo,~(1,a) Zhi Zhang,~2 and Shaopu Yang~3 1)Department of Mechanics,Shijiazhuang Tiedao University,Shijiazhuang 050043,china. 2)school of civil engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,china 3)school of Mechanical engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,china school of Mechanical engineering Shijiazhuang Tiedao University Shijiazhuang 050043 China

Wave approach is used to analyze the longitudinal wave motion in one dimensional non-uniform *** assumptions of constant wave velocity and no wave conversion,there exist four types of non-uniform rods and corresponding traveling wave solutions are *** obtained results indicate that the kinetic energy is preserved as a constant and the wave amplitude is inversely proportional to square root of the cross-sectional area of the *** certain condition,there exists a cut-off frequency for the rod with variation in geometric or material properties,below which waves do not propagate along the non-uniform *** the rod with arbitrary variable cross-section, the conclusions are similar if the wave frequency is high *** a series solution of the wave motion is presented.

关键词： longitudinal wave traveling solution cut-off frequency non-uniform rod

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维普期刊数据库

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Outdoor Test of Wind-Drifted Snow Distribution around a Cube

Outdoor Test of Wind-Drifted Snow Distribution around a Cube

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2010 International Conference on Advanced Measurement and Test (AMT 2010)

作者： Keqin Yan 1 2 a Xuanyi Zhou 1 b Ming Gu 1 c 1 State Key Laboratory for Disaster Reduction in civil engineering Tongji University Shanghai 200092 china 2 school of civil engineering Huangshi Institute of Technology Huangshi 435003 china

This paper presents the results of an outdoor investigation of wind-drifted snow distribution around a *** test was performed in a simple outdoor wind tunnel at Harbin in January *** distribution around the cube and pressure coefficient on the cube surfaces are also simulated with computational fluid dynamics（CFD）.The simulation is based on homogenous two-phase flow theory,where the flow field is predicted by solving Navier-Stokes equations for transient,incompressible viscous *** inlet profiles of the simulation adopted data got from wind *** between the test result and that of simulation shows that velocity is closely related to the snow distribution.

关键词： outdoor test wind-drifted now distribution CFD simulation Navier-Stokes equations

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MODELING OF MULTILAYERED ACOUSTIC WAVE DEVICES WITH THE METHOD OF REVERBERATION-RAY MATRIX

MODELING OF MULTILAYERED ACOUSTIC WAVE DEVICES WITH THE METH...

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第三届全国压电和声波理论及器件技术研讨会

作者： Yong-qiang GUO Key Laboratory of Mechanics on Disaster and Environment in Western china,Ministry of Education, and school of civil engineering and Mechanics,Lanzhou University,Lanzhou 730000,china Wei-qiu CHEN Key Laboratory of Soft Soils and Geoenvironmental engineering,Ministry of Education, and Department of civil engineering,Zhejiang University,Hangzhou 310027,china

The method of reverberation-ray matrix(MRRM) are modified and extended to the analysis of wave propagation in multilayered acoustic wave devices based on three-dimensional linear *** the plane wave solution assumption,state equations are established whose solutions are expressed with unknown wave *** the framework of MRRM,the phase and scattering relations are properly set up to determine the unknowns without involving exponentially growing functions and matrix inversion operations in an easy and uniform *** the present MRRM is unconditionally stable and free from limitations to the frequency,the thickness of individual layers and the total number of *** surface waves,the interface waves and the bulk waves are all included in the formulation. Therefore,the present formulation applies to SAW devices as well as BAW *** examples are given to illustrate the well performance of the proposed formulation of MRRM for the analysis of free waves in multilayered acoustic wave devices.

关键词： Multilayered piezoelectric structures acoustic wave devices wave propagation method of reverberation-ray matrix

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Study on Structural Safety Monitoring and Condition Assessment System for Nanjing Yangtze River Bridge

Study on Structural Safety Monitoring and Condition Assessme...

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2004安全科学与技术国际会议

作者： HUANG Fanglin1 HUANG Dongsheng2 ZENG Chuhui1 HE Xuhui1 & CHEN Zhengqing1 3 (1school of civil engineering and Architecture Central South University Changsha 410075 Hunan china) (2 school of Automobile and Mechanical engineering Changsha Univ of Sci and Tech Changsha 410076 Hunan china) (3 school of civil engineering Hunan University Changsha 410082 Hunan china)

The safety monitoring and condition assessment system (SMCAS) constructed for the Nanjing Yangtze River Bridge (NYRB) and its functions are introduced in this paper. The SMCAS, which allows the bridge

关键词： structural safety monitoring and condition assessment system Nanjing Yangtze River Bridge safety monitoring condition assessment

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自由端受集中力作用下压电悬臂梁弯曲问题解析解

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力学季刊 2003年第3期24卷 327-333页

作者：杨德庆刘正兴上海交通大学船舶与海洋工程学院上海200030 上海交通大学建筑工程与力学学院上海200030

本文对由横观各向同性压电介质构成的悬臂梁,在自由端受集中力作用下的弯曲问题进行了研究。首先根据问题的特点,得到简化的线弹性压电悬臂梁的基本方程。然后根据正交各向异性材料悬臂梁应力分布特点,采用边解法,建立了该问题的应力函... 详细信息

本文对由横观各向同性压电介质构成的悬臂梁,在自由端受集中力作用下的弯曲问题进行了研究。首先根据问题的特点,得到简化的线弹性压电悬臂梁的基本方程。然后根据正交各向异性材料悬臂梁应力分布特点,采用边解法,建立了该问题的应力函数与电势分布函数,进而得到精确多项式解析解。该解析解形式简单,便于应用。文中对自由端受集中力的常规材料和压电材料悬臂梁的挠度也进行了比较。

关键词：悬臂梁压电横观各向同性材料逆解法多项式解

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Numerical Tests of Fracture Saturation in Reinforced Concrete Structure

Numerical Tests of Fracture Saturation in Reinforced Concret...

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2007国际计算力学研讨会

作者： Juanxia Zhang~(1*) Chun’an Tang~2 Xiuyan Zhou~1 Xianzhang Guo~3 1 Northeastern University at Qinhuangdao Hebei Qinghuangdao 066004 china 2 Department of Hydraulic and civil engineering of Dalian University of Technology Dalian 16024 china 3 school of Resource and civil engineering of Northeastern University Shenyang 11000 china

＜正＞Cracking significantly affects the behaviors of reinforced concrete structures and periodically distributed fracture spacing phenomenon exist in the failure mode of the reinforced concrete structure,In this paper,a three dimension numerical test code named Realistic Failure Process Analysis was used to study the mechanisms of the fracture nucleation,formation,infill and saturation of the reinforced concrete structure. The numerical test results agree well with the experimental result not only on failure mode but also on the stress-strain distribution *** stress field distribution is gained by five numerical tests results for the samples with different crack spacing,and in which it can be indicated the form mechanisms of fracture spacing phenomenon,and the numerical tests give the stress distribution rules by the ratio of fracture spacing to concrete protection thickness of the reinforced concrete samples.

关键词：

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Application of TSP and Advanced Drilling Geological Prediction Technology in Construction of Qiyueshan Tunnel

Application of TSP and Advanced Drilling Geological Predicti...

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第12届国际地下空间联合研究中心年会

作者： Xinping Rao Wu Yi Hui Sun Zhenhua Zhang①Three Gorges University Key Laboratory of Geological Hazards in Three Gorges Reservoir Area Ministry of Education Yichang 443002 china②school of civil engineering Wuhan University Wuhan 430072 china

＜正＞Some kinds of geological disasters such as karst,water and slurry gushes often broke out in karst area during construction of a *** the precise and immediate advanced forecast and auxiliary techniques,which are the key problems to be researched and resolved currently in tunnel construction in karst areas,should be used in order to pass through numerous harmful geological zones in the process of ***203 plus system and exploitation water of advanced drilling are used to forecast the karst crannies in right of the Qiyueshan Tunnel and to guide pre-drapery injected,which gains good *** method might be used as a source of reference in future similar projects.

关键词： TSP203 Exploitation water Advanced drilling Qiyueshan Tunnel pre-drapery injected Karst areas

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Seismic Safety Investigation on Laminated Pier of Simple-Supported Bridge

Seismic Safety Investigation on Laminated Pier of Simple-Sup...

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2004安全科学与技术国际会议

作者： DOU Huijuan1 & LI Xinle2 (1 Department of Communication engineering Shijiazhuang Railway Institute Shijiazhuang 050043 Hebei china) (2 school of civil & Architecture engineering Beijing Jiaotong University Beijing 100044 china)

Applying the lamination ideas to the seismic design of reinforce concrete pier, the mechanical principle and characteristics of laminated pier are analyzed, and the ductility calculation method for la

关键词： laminated pier ductile coefficient seismic safety performance bridge

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