用拉压不同模量理论计算支座移动引起的超静定结构内力     

姚文娟  叶志明 《上海大学学报(英文版)》2004,8(3)

For statically indeterminate structure, the internal force will be changed with the translation of the supports, because the internal force is related to the absolute value of the stiffness EI. When the tension is different with the compression modulus, EI is the function of internal force and is not constant any more that is different from classic mechanics. In the other words, it is a nonlinear problem to calculate the internal force. The expression for neutral axis of the statically indeterminate structure was derived in the paper. The iterative program for nonlinear internal force was compiled. One case study was presented to illustrate the difference between the results using the different modulus theory and the single modulus theory as in classical mechanics. Finally, some reasonable suggestions were made for the different modulus structures.  相似文献   

关于Sikkema—Bernstein多项式导数的迭代极限     

葛金辉  何甲兴 《通化师范学院学报》2001,22(2):23-26

本首先给出了Sikkema-Bernstein多项式的迭代极限及误差估计；然后构造一个整系数Sikkema-Bernstein型多项式，并给出了该多项式的导数逼近导函数是有界变差时的收敛阶估计式。  相似文献   

二阶隐积分微分方程的周期边值问题     

陈丽华 《福建师大福清分校学报》2004,(2):1-2,8

研究一类二阶隐积分微分方程的周期边值问题,首先将方程转化为算子方程,然后对算子方程应用广义迭代法证得算子方程极解的存在性和单调性,从而证得周期边值问题极解的存在性和单调性.  相似文献   

网络舆论中的蝴蝶效应：混沌理论视野的解释   总被引：2，自引：0，他引：2  

党生翠 《内蒙古大学学报(人文社会科学版)》2011,(3):115-120

由微内容引起的网络反腐、网络流言、网络造星等＂舆论风暴＂被喻为网络舆论的蝴蝶效应。该概念在学界存在一定程度的异化现象。只有将蝴蝶效应置于混沌学视野的复杂动力学图谱,引入自组织概念,才能避免网络舆论先天不足偏见。研究发现,奇异吸引子触动网络舆论蝴蝶效应的舆论扳机,正反馈集聚引发连锁反应,信息与观点的分形与迭代贯穿其全过程。  相似文献   

三个渐近非扩张映象的三步迭代序列收敛问题     

李军  史云磊 《烟台职业学院学报》2011,17(2):88-92

本文研究了三个渐近非扩张映象的三步迭代序列收敛问题,所得结果改进和发展了相关文献中的结果。  相似文献   

项目驱动的软件工程进化式教学方法     

朱忠旭 《淮南师范学院学报》2014,(2):136-138

将迭代进化的思想引入软件工程课程的教学中,提出项目驱动的进化式的教学方法。该方法以达到实用程度的软件项目贯穿教学过程的始终,根据该软件开发的三次迭代,将教学过程分为三个阶段,各阶段分别采用"教师引导学习、教师指导实践、学生独立实践"的教学方式,使学生对软件工程原理和方法达到从认知到理解再到应用的进化式掌握。  相似文献   

矩阵方程AXB+CXD=F的两种参数迭代解法的讨论     

李海合  傅永洁 《天水师范学院学报》2006,26(5):24-25

讨论了求解线性矩阵方程AXB CXD=F的两种参数迭代方法,并分别分析了两种迭代方法的收敛性。  相似文献   

Which events can cause iteration in instructional design? An empirical study of the design process     

D. M. L. Verstegen  Y. F. Barnard  A. Pilot 《Instructional Science》2006,34(6):481-517

Instructional design is not a linear process: designers have to weigh the advantages and disadvantages of alternative solutions, taking into account different kinds of conflicting and changing constraints. To make sure that they eventually choose the most optimal one, they have to keep on collecting information, reconsidering continuously whether their own decisions are still justified in the light of the latest insights. We have studied the role of iteration during instructional design. For our research, we have used an ISD-based method for the specification of training simulators. During our empirical evaluation study, we introduced five events that are likely to cause iteration. The results show that the quality of the designs is not directly related to the amount of iteration. We conclude that there are different kinds of iteration, triggered by different kinds of actions and events. We propose a list of triggers for iteration some of which originate from outside (new information, new opinions/arguments and acquisition procedures); others are caused by, or evolve from interaction with the design process itself (discovery of missing input, need to repair errors, new insights based on work later on in the design process, and new ideas of the designers). in final form: 4 August 2005  相似文献   

一类非线性Φ-强伪压缩映射Mann迭代序列的收敛性     

汪志明  刘凤池  张健  吴焕春 《唐山学院学报》2007,20(4):101-102,116

在q一致光滑Banach空间中,研究了一类广义LipschitzΦ-强伪压缩映射和Φ-强增生映射的Mann迭代收敛问题,所得结果改进和扩展了目前的相关结果。  相似文献   

用迭代法计算预定精确度下的算术平方根   总被引：1，自引：0，他引：1  

刘红超  陈惠汝 《黄冈师范学院学报》2004,24(3):24-26

本给出了在预定精确度下用迭代法计算算术平方根的方法，并分析了迭代的误差，给出了预定精确度下初始值的一个选取范围．  相似文献