考虑剪切效应有限变形粘弹性板的动力稳定性

Based on Reddy‘s theory of plates with higher-order shear deformations and the Boltzmann superposition principles,the governing equations were established for dynamic stability of viscoelastic plates with finite deformations taking account of shear effects,The Galerkin method was applied to simplify the set of equations.The numerical methods in nonlinear dynamics were used to solve the simplified system.It could e seen that there are plenty of dynamic properties for this kind of viscoelastic plates under transverse harmonic loads.The influences of the transverse shear deformations and material parameter on the dynamic behavior of nonlinear viscoelatic plates were investigated.     

农村中小学教师管理亟待改革

近年来，随着“以县为主”教育管理体制的实施．农村中小学教师的工资能及时到位了、教师队伍的稳定性增强了。但随着改革的不断深入．教师管理中的一些问题也日趋突出。     

心理教育范式刍议

心理教育范式是心理教育体系的基本范畴和逻辑起点,具有多元层次性、聚同排他性、潜在组织性、整体生成性、相对稳定性、双重矛盾性等特点,从"隐喻"角度看具有研究定向作用、桥梁纽带作用、社会组织作用、认识框架作用和学科规范作用等.多元融合是心理教育范式建构与发展的一个基本趋向.     

掺铒光纤激光器稳定特性分析

本文研究掺铒光纤激光器的瞬时变化特性以及动力学行为特点,分析了激光及光子数密度波动变化特点以及一级近似光子数密度波动函数.当泵浦起伏具有高斯白噪声特点时,泵浦起伏增加了激光的波动特性.在共振现象中,光子数密度的波动幅值随着离子浓度和光子寿命的增加而变大且激光的波动增强,但相对值却变小了.     

东北春小麦晚熟品种(系)产量稳定性分析

本文系统研究了国家春小麦晚熟区域16个参试品系在该生态12个试验点2004年的产量结果。通过对方差分析及主要丰产性、稳产性参数的分析，综合评价各试材在不同试验地点的产量潜力及其稳定性表现，为各麦区的品种选择和布局提供有益的参考。     

Numerical Analysis of the Stability of Embankment Slope Reinforced with Piles

The effects of stabilizing piles on the stability of an embankment slope are analyzed by numerical simulation. The shear strength reduction method is used for the analysis, and the soil - pile interaction is simulated with zero-thickness elasto-plastic interface elements. Effects of pile spacing and pile position on the safety factor of slope and the behavior of piles under these conditions are given. The numerical analysis indicates that the positions of the pile have significant influence on the stability of the slope, and the pile needs to be installed in the middle of the slope for maximum safety factors. In the end, the soil arching effect closely associated with the space between stabilizing piles is analyzed. The results are helpful for design and construction of stabilizing piles.     

高阶非线性系统零解的全局稳定性

研究了一类高阶非线性微分系统，通过建立适当的李雅普诺夫函数，得出了这类高阶非线性系统零解全局渐进稳定性较弱的充分条件。     

“绿洲丝绸之路”新疆段乐舞文物资料概要

音乐文物资料是研究古代西域乐舞和古代丝绸之路音乐文化的重要依据之一,文章从四个方面详细阐述了“绿洲丝绸之路”的音乐文物资料,提出通过“逆向溯源”思维方法,结合中亚、西亚、北非乐舞文物资料及古籍,进一步揭开中国、亚洲乃至世界乐舞史上众多的谜团。     

真理若干问题的反思

真理观中的许多问题 ,如正确感性认识的真理性问题、真理的价值性、客观性问题等 ,一些传统的观点并非都是完整严密、科学正确的。正确的感性认识不能被称为真理 ,价值性和客观性都不是真理的基本属性