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Mechanical property and deformation mechanism of gold nanowire with non-uniform distribution of twinned boundaries:A molecular dynamics simulation study

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Chinese Physics B 2021年第5期30卷 520-525页

作者： Qi-Xin Xiao Zhao-Yang Hou Chang Li Yuan Niu School of Science Chang'an UniversityXi'an 710064China

The mechanical property and deformation mechanism of twinned gold nanowire with non-uniform distribution of twinned boundaries(TBs)are studied by the molecular dynamics(MD)*** is found that the twin boundary spacing(TBS)has a great effect on the strength and plasticity of the nanowires with uniform distribution of *** the strength enhances with the decrease of TBS,while its plasticity *** the nanowires with non-uniform distribution of TBs,the differences in distribution among different TBSs have little effect on the Young's modulus or strength,and the compromise in strength *** the differences have a remarkable effect on the plasticity of twinned gold *** twinned gold nanowire with higher local symmetry ratio has better *** initial dislocations always form in the largest TBS and the fracture always appears at or near the twin boundaries adjacent to the smallest *** simulation results are consistent with the experimental results.

关键词： twin nanowire gold non-uniform distribution mechanical property molecular dynamics simulation

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RELOCATION ALGORITHM FOR non-uniform distribution IN MOBILE SENSOR NETWORK

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Journal of Electronics(China) 2009年第2期26卷 222-228页

作者： Pei Zhiqiang Xu Changqing Teng Jing Department of Electronic Engineering Shanghai Jiaotong University Shanghai 200240 China

Energy is the determinant factor for the survival of Mobile Sensor Networks(MSN).Based on the analysis of the energy distribution in this paper,a two-phase relocation algorithm is proposed based on the balance between the energy provision and energy consumption *** main objectives are to maximize the coverage percentage and to minimize the total distance of node *** algorithm is designed to meet the requirement of non-uniform distribution network applications,to extend the lifetime of MSN and to simplify the design of the routing *** ad-dition,test results show the feasibility of our proposed relocation algorithm.

关键词： Mobile Sensor Networks(MSN) Energy balance Energy distribution non-uniform distribution

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Experimental study of the effects of non-uniformly distributed fine soil on mechanical properties of Shenyang–Dandong Railway coarse-grained soil

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Research in Cold and Arid Regions 2015年第5期7卷 503-512页

作者： QianMi Yu JianKun Liu JingYu Liu DingJun Lv TengFei Wang School of Civil Engineering Beijing Jiaotong University

The stress produced by repeated train loads decreases with increasing railway subgrade bed depth, and slightly weathered coarse particles of subgrade bed fillings can be broken at different levels under continuous load. Thus, the mass of fine soil, with a diameter of not more than 0.075 mm, is different at different depths. Fine soil is also sensitive to frost heave and thaw settlement. In order to study the effects of non-uniformly distributed fine soil on the mechanical properties of coarse-grained soil of the Shenyang-Dandong Railway, triaxial tests were conducted with three types of specimens, un- dergoing six freeze-thaw cycle numbers （0, 1, 3, 7, 9, 12） and three confining pressures （100, 200, 300 kPa）. The freezing temperature is -5 ~C and the thawing temperature is ＋15 ~C. The stress-strain behavior, static strength, resilient modulus, cohesive force and the angle of internal friction were measured for different tested specimens. As a result, the law of static strength and resilient modulus of different specimens following the increase of freeze-thaw cycles under three confining pressures is obtained. The changing law of cohesive force and friction angle of three specimens following the increase of freeze-thaw cycles is also calculated, and the different results of different specimens are also compared.

关键词： fine soil non-uniform distribution freeze-thaw cycles soil mechanical properties

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