New Method for Solving Elasticity Problems of Some Planar Quasicrystals and Solutions

A new method for solving elasticity problems of some planar quasicrystals is presented.The set of partial differential equations for the phonon and phason displacement components is reduced to a single higher-order equation by introducing a displacement function.A general solution formulation is suggested.As an example,the elastic field caused by a dislocation in planar quasicrystals of point groups 5 m,10,and 10mm is calculated.

Exact Analytic Solutions for a Finite Width Strip with a Single Edge Crack

The present study develops a conformal mapping technique and deals with the exact analytic solutions in closed form to the finite width strip with single edge crack.Some exact solutions including a universal suitable constant are found,which are very useful in science and engineering.

Analytic Solution of an Asymmetrical Crack in a Strip

We present the analytic solution of an asymmetrical crack in a strip from which the stress intensity factors are determined.The results have important application in earthquake source physics and provide information concerning the instability of faults and the detection of earthquake precursors.

Soliton, Positon and Negaton Solutions of Extended KdV Equation

Darboux transformation （DT） provides us with a comprehensive approach to construct the exact and explicit solutions to the negative extended KdV （eKdV） equation, by which some new solutions such as singular soliton, negaton, and positon solutions are computed for the eKdV equation. We rediscover the soliton solution with finiteamplitude in [A.V. Slyunyaev and E.N. Pelinovskii, J. Exp. Theor. Phys. 89 （1999） 173] and discuss the difference between this soliton and the singular soliton. We clarify the relationship between the exact solutions of the eKdV equation and the spectral parameter. Moreover, the interactions of singular two solitons, positon and negaton, positon and soliton, and two positons are studied in detail.

THE KINETIC ENERGY FORMULA OF A MOVING CRACK IN ELASTO-PLASTIC MEDIUM

A kinetic energy formula has been obtained for a moving crack in elasto-plastic medium.It will reduce to the famous Mott's formula when the medium is changed into a linear elastic one.

RFID技术在航标管养上的应用

通过分析RFID(Radio Frequency Identification)技术优点和航标器材管理特点,探讨RFID技术在航标浮体管理中的应用.基于RFID的管理系统,实现与广东海事局航标运行管理信息化系统的数据共享,可以完成航标档案扫描查询、出入库管理、浮体定位及保养跟踪等功能,数据实时读取和交换可以提高航标管理水平,为航标保养提供有力依据.

肩关节后脱位诊断与治疗的专家共识

临床上肩关节后脱位的治疗方法尽管多样,但限于单个单位的病例有限,难以积累一定的临床经验,且疗效的判定标准又各有不同。因此,国内外尚没有统一的诊疗规范可以借鉴,也就难以对医师进行规范的培训与指导。这既给医师的诊疗行为带来一定的风险,也给患者的康复与生活造成困扰甚或不幸,由此导致的医疗纠纷甚或诉讼时有发生。显然,规范肩关节后脱位的临床诊疗行为,提高肩关节后脱位的临床诊疗水平势在必行。上海市医学会骨科分会关节镜学组,对此专门组织讨论并达成此共识。尽管这是一个区域性的诊疗共识,但仍不失学习、参考、借鉴之处。希望在此基础上,能进行更深入讨论,也期望有关医疗单位积极参与并积累更多的病例,为开展多中心研究,为逐步形成全国的共识奠定基础。