Influence of lateral initial pressure on axisymmetric wave propagation in hollow cylinder based on first powerhypo-elastic model简

Influence of identical applied initial pressures on the radial surfaces of a hollow cylinder which is compose of materials with first power hypo-elastic constitutive model was investigated.The basic equations of the problem were built up based on the framework of piecewise homogeneous body model with the use of three-dimensional linearized theory of elastic waves in initially stressed bodies（TLTEWISB）.With the method proposed previously,this problem was then solved numerically.Moreover,the dispersion group velocity of the lowest order mode with different initial pressures was also studied.It can be concluded that the initial pressure and the geometry parameters will induce considerable changes of different degrees in dispersive relation between phase velocity and wave number in opposite trend（positive in initial pressure and negative in thickness）.     

稀土元素对Ni-Cr-Al合金高温氧化影响机理的研究

采用第一性原理赝势平面波方法,通过Materials Studio软件中的Castep模块,建立Al2O3晶胞,稀土元素Y的加入有助于控制Al2O3或Cr2O3的生长速度,减少氧化薄膜和基体间形成空洞,从而提高氧化薄膜的粘附性.稀土元素La的加入与S形成化合物,消除S对基体产生的不良反应,改善了氧化薄膜的粘附性.     

企业网站设计内容第一的原则

企业网站设计内容第一的原则,其根本在于企业网站能否吸引和留住客户或潜在客户,它包含三层意思：网站内容的面向对象要准确清晰;针对目标访客的网站内容要紧扣其兴趣中心,从为其带来价值的角度出发,令其感到有收获;促使目标访客对网站内容建立起充分的信任感、解答其疑问。从网站内容方面保证了企业网站对目标访客的吸引力和访问粘度,从而为企业网站实现其既定目标打下了良好的基础。     

以人为本与管理善治

以人为本是科学发展观的核心,坚持以人为本是我党新时期提出的新要求.古今中外的管理思想都以以人为本为本源,而善治是以人为本理念的彰显,二者结合下的制度建设和完善是和谐社会实现的条件.     

努力建设让人民满意的服务型政府

十八届三中全会召开后,我国构建服务型政府的伟大战略进入了一个新的发展阶段。本课题联系当前服务型政府建设实际,进而提出相应的对策思路。     

民生视阈下提升高职院校社区服务能力的研究

服务社区是高职院校服务社会、实现自身发展的有效途径。通过对高职院校服务社区过程中存在的问题和原因分析,给出提升高职院校社区服务能力的对策及可行性建议,为今后的相关工作提供参考。     

GCr15厚壁管带芯棒剪切实验研究

介绍了GCr15厚壁管材的两种剪切方法 ,研究了单向剪切时间隙对剪切质量的影响和双向剪切时首次压下量对剪切质量的影响 ,分析了管材的剪切机理     

以科学发展观为指导推进高校人才工作

高校人才工作要遵循科学发展观 ,坚持以人为本 ,全面、协调、可持续地发展。目前高校人才工作面临着学校效益目标和学术目标 ,规模、质量和效益 ,引进与培养 ,流动与稳定等诸多矛盾。要在科学发展观指导下 ,探索新思路 ,采取新措施 ,扩大师资队伍 ,加强青年教师的引进和培养 ,实施聘任制 ,做好教师服务工作     

铁547B合金热喷熔技术在高温高压阀门密封面性能强化方面的研究

用氧乙炔焰加熔剂助熔一步法在12Cr1MoV珠光体耐热钢高温高压阀门密封面基体上喷熔Fe547B合金粉末,对喷熔工艺及喷熔层的硬度、时效硬化特性、热耐久性能、抗擦伤性能等性能进行了较系统的试验研究。证明用喷熔Fe547B合金粉末工艺修复电站高温高压阀门密封面裂纹是可行的。     

Using static suffix array in dynamic application: Case of text compression by longest first substitution

Over the last decade, enhanced suffix arrays (ESA) have replaced suffix trees in many applications. Algorithms based on ESAs require less space, while allowing the same time efficiency as those based on suffix trees. However, this is only true when a suffix structure is used as a static index. Suffix trees can be updated faster than suffix arrays, which is a clear advantage in applications that require dynamic indexing. We show that for some dynamic applications a suffix array and the derived LCP-interval tree can be used in such a way that the actual index updates are not necessary. We demonstrate this in the case of grammar text compression with longest first substitution and provide the source code. The proposed algorithm has O(N²)$O(N^2)$ worst case time complexity but runs in O(N)$O(N)$ time in practice.