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

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.     

多目标最优化问题的约束品性

利用Hadamard方向导数这一工具,获得了不等式约束条件下多目标规划问题的约束品性,这一约束品性在某种程度上是Maeda和Preda等人研究结果的进一步推广．     

汇率干预中的多点自由边值问题的数值计算方法

1IntroductionIt is i mportant for the economic development of acountry to maintain the stabilization of exchange rate,so the intervention of exchange rate has become thetopic of the main concerns of the economic and math-ematical circles[1-5].To maintain the stabilization ofexchange rate,many countries use target zone re-gi mes,that is,the central banks intervene in the for-eign exchange market such that the exchange ratestays within the interval[a,b].There are fixed costand cost proportional …     

几何刚度矩阵的推导和应用

以虚功原理为基础有限元进行梁柱的分析，应用很少，主要是于在计算中，荷载很小时，计算结果就不收敛了。因而也就很难应用于工程分析中。以虚功原理为基础推导得出了几何刚度矩阵，分析了计算不收敛的原因，得出结论：不考虑节点力因位移产生的不平衡力对几何刚度矩阵的影响，是计算结果不收敛的主要原因。算例说明了当考虑了这个影响以后，计算结果和文献给出的计算结果符合良好。     

SQL语言在Delphi数据库编程中的应用

讨论了SQL语言在Delphi数据库编程中实现的方法及如何编写和执行SQL语句,并给出了具体的实例。     

知识管理在程序设计教学中的应用效果研究

采用实验研究方法、问卷调查法和访谈法对知识管理理论在计算机程序设计基础教学活动中的应用效果进行研究,通过对研究数据的分析得出以下结论:知识管理理论融入计算机程序设计基础教学对于学生树立正确的学习态度、激发学生的学习兴趣、培养学生学习的自主性、提高学生利用所学知识解决实际问题的知识迁移能力,培养学生的创新能力等方面都是有效的。     

间接干预的物价的微分方程模型

在已有物价模型的基础上,结合中国特殊的不成熟的市场经济环境,对原模型进行修改和补充,把货币供给量对物价的影响加进去形成了新的间接干预物价的微分方程模型.首先利用非线性微分方程相关理论讨论了模型的稳定性和分支等数学特征,然后通过数值模拟进一步分析验证,最后介绍了模型结果在经济意义下对物价分析的解释和应用.     

基于网络协作模式的教学资源建设与实践——以C程序设计课程为例

基于网络协作学习理论,围绕＂C程序设计＂课程建设目标,在建设立体化课程教学资源的同时,构建了基于Wiki的网络协作教学支撑平台。通过教学实践,不仅强化了优质教学资源的共建共享,也对进一步提高课程教学质量,促进人才培养模式改革产生了积极作用。     

Video retargeting using optimized crop-and-scale

Mobile devices are increasingly powerful in multimedia transmitting and browsing. However, the small screen and different aspect ratios of mobile devices lower visual quality while watching images or videos. Video retargeting is aim at fitting an existing video into arbitrary size and aspect ratio. Previous content-aware retargeting methods are mostly high computational cost, which limits their applications on the portable devices with low computation ability. In this paper, a new crop-and-scale approach is presented to adapt video to better suit the target display. We automatically find the optimal parameters of cropping window using the dynamic programming method, and then scale it to fit the target display. The cropping window can smoothly shift during a shot to follow the movement of important objects. The retargeting results using our approach introduce no deformation and jitter effects over the whole video. Experimental results show the success of our approach on adapting a variety of source videos to small display sizes.     

MATLAB语言在教学管理中的应用

针对教学管理任务中的批量数据处理和分析报告,采用MATLAB语言和Word文字处理软件联合程序设计的方法,利用动态数据交换技术,实现教学成绩批量处理和自动分析。文中给出了系统工作流程,并在此基础上阐述了程序设计原理,以示例的方式给出了实现方法。