The limit analysis in soil and rock： a mature discipline of geomechanics

The solution of a slope stability problem can be approached by its least upper-bound and maximum lower-bound with high accuracy. The limit equilibrium methods that employ vertical slices imply a lower bound of the factor of safety. It has been successfully extended to the area of active earth pressure analysis that accounts for different input of locations of earth pressure applications. Those methods that employ slices with inclined interfaces give an upper-bound approach to the stability analysis. It enjoys a sound mechanical background and is able to provide accurate solutions of soil plasticity. It has been successfully extended to the area of bearing capacity analysis in which various empirical coefficients are no longer necessary. The 3D upper- and lower-bound methods under this framework have been made possible and show great potential for solving various engineering problems.     

义务教育均衡发展机制的欠缺与完善 ——以广州地区为例

目前，相关法律政策的落实以及配套机制的欠缺，制约和影响了义务教育均衡发展。本文以广州地区在推进义务教育均衡发展过程中存在的困扰为例，在对当前义务教育实施过程中存在的制度落实和机制欠缺问题分析的基础上，提出了完善义务教育均衡发展机制的建议。     

用Excel求方程的根

该文探讨用电子表格Excel实现求解方程的方法,用这些方法可以实现求解方程的算法。     

高校招投标过程监督对策研究

随着高等教育规模的不断拓展,高等院校的招投标项目也越来越多．加强和规范对招投标过程监督已经成为各个高校面临和解决的重大课题,文章主要从解决问题的角度,展开对招投标过程监督的对策性研究．以期达到规避问题和规范招投标行为的目的．     

一类非自治阶段结构捕食系统的概周期解

研究了一类非自治阶段结构捕食系统的渐近性质,得到在适当的条件下系统的持久性及对应概周期系统正概周期解的存在性、唯一性以及全局渐近稳定性.     

广义正交矩阵的几个性质

推广了正交矩阵 ,并研究了广义正交矩阵在行列式、特征根、伴随矩阵等问题中的四个性质     

试析足球裁判员判罚失误的心理因素及解决办法

足球裁判员的执法水平如何 ,直接影响到足球运动的发展。裁判员在执法过程中一旦出现不良心理必然会导致漏判、误判、错判。裁判员在执法时常见的松懈、急躁、逆反、补偿、怯场、迎合是不良心理产生的原因。提出了有关的解决办法。     

Influence of Magnetic Field on the Rectification Process of Binary Heterogeneous Azeotrope

To improve separate effect of binary heterogeneous azeotrope in the magnetic field with different magnetic induction intensity, the influence of magnetic field on the rectification process of binary heterogeneous azeotrope was investigated with l-butanol-water system. The results show that the composition of liquid-liquid phase equilibrium of l-butanol-water system has definitely changed, the composition of l-butanol in light phase （l-butanol layer） increases by 1. 17%-1.63% and the composition of water in heavy phase （water layer） increases by 1.21%-1.58% under the influence of magnetic field. By separation of magnetization, the composition of l-butanol increases by 0.8%-1.2% and the recovery ratio of 1 -butanol increases by 1.6%-2.5%. Magnetic field has positive effect, however, the magnetized effect is not in proportion to magnetic induction intensity and has an optimum condition, in the range of 0.25 T-0. 3 T.     

开放教育实验教学存在的问题和对策

课程实验教学在培养学生动手能力和创新精神方面有不可替代的作用。然而，课程实验教学还没有得到足够的重视。本文分析了当前电大远程开放教育课程实验教学的现状、地位及作用，加强课程实验教学的紧迫性，并结合阳春电大的教学实践提出了加强课程实验教学的对策。     

我国太极拳运动发展现状与对策研究

太极拳运动在我国已有几百年的发展历史，而当今我国太极拳的发展有多个制约，主要是：普及面不广，普及的阶层差异大；教法落后，缺少高水平的师资队伍；各派缺少交流；竞赛水平不高，影响力不大。太极拳运动发展的对策是：改革太极拳运动的教法，培养高水平的师资队伍；提高竞技水平，扩大太极拳的影响力；促进太极拳走实体化和职业化道路。