碳纤维加固钢筋混凝土柱试验研究与应用

碳纤维加固混凝土柱通过横向约束作用,提高柱的轴心受压承载力,增加柱的延性。利用碳纤维材料作围套加固混凝土轴心抗压柱,具有施工简单、抗腐蚀能力强、约束效果好等优点。     

20世纪90年代以来宋词“月”意象研究综述

月是我国古典诗词中一个常用意象。人们对“月”意象的研究角度各有千秋,尤其是20世纪90年代以来,宋词“月”意象研究成果斐然,对此作一简要综述。     

基于视频压缩编码的动态图像水印方案

提出了一种新的基于视频压缩编码的动态图像水印方案。在嵌入水印时,充分考虑动态图像压缩编码的特性,对帧内编码帧(I帧),将水印信息嵌入到DCT低频系数中;而对帧间编码帧(P,B帧),结合动态补偿/离散余弦变换(MC/DCT)混介编码,把水印信息嵌入到运动补偿后的残差图像的自流成分中。同时,在水印嵌入时,采用扩频技术与多维水印相结合的方法,并通过相关检测的方法判断水印的存在。由于水印的检测是对视频码流直接实施的,不需要对压缩数据进行完全解码,从而大大降低了计算量,提高了视频数据水印的适用性。     

最优控制理论及其在视频编码中的应用

介绍了最优控制理论及其求解方法,概述了最优化方法的新进展,通过在视频编码中应用最优化理论解决运动估计问题,验证了最优化理论的效率。     

古雅意象凝结的幽微诗情——论金克木三十年代的诗歌

金克木的诗歌注重对主客体交融的"意象"选用,化古为今,反映了1930年代典型的现代"诗情".在其诗作中,别致的古词是用来表达现代人的感触,蕴含了一种民族审美特质.在有限的诗性空间里,展示无限的风景和含蓄的意境.     

Prospective classroom teachers’ metaphorical images of selves and comparing them to those they have of their elementary and cooperating teachers

Currently, it is strongly suggested that our thought processes are largely metaphorical in nature. Indeed, the metaphors we use not only represent the way we perceive the world and reality but also shape our professional ideas, attitudes, and practices. This study employs metaphor as a means of research to provide insights into the images prospective classroom teachers have of themselves as future teachers (i.e., professional self-images), their elementary teachers (i.e., former classroom teachers), and their cooperating teachers (i.e., supervisors of student teaching practices). Data for this study were gathered through the administration of a Likert-style questionnaire consisting of 20 metaphorical images of “classroom teacher” to 363 exit level elementary teacher education students enrolled in the Faculty of Education of Selcuk University in Turkey during the 2002–2003 academic year. Results indicate that the teacher candidates in this study appear to be less teacher-centered and more student-centered than their both elementary and cooperating teachers. Also, female teacher candidates appear to be less teacher-centered and more student-centered than their male peers. Implications for preservice teacher education and further research are discussed.     

On the compression of search trees

Let X=_x1,_x2,…,_xn$X=x_1\text{,}{x}_2\text{,}\dots \text{,}{x}_n$ be a sequence of non-decreasing integer values. Storing a compressed representation of X that supports access and search is a problem that occurs in many domains. The most common solution to this problem uses a linear list and encodes the differences between consecutive values with encodings that favor small numbers. This solution includes additional information (i.e. samples) to support efficient searching on the encoded values. We introduce a completely different alternative that achieves compression by encoding the differences in a search tree. Our proposal has many applications, such as the representation of posting lists, geographic data, sparse bitmaps, and compressed suffix arrays, to name just a few. The structure is practical and we provide an experimental evaluation to show that it is competitive with the existing techniques.     

基于多重分形滤波的遥感图像岩性信息增强研究

近年来,随着遥感技术和地质学的深入发展,越来越多学者尝试利用遥感数据进行岩性信息增强的深入研究。但在茂密的植被覆盖地区,岩石出露有限,地层可见度较低,不易在遥感图像上直接提取分析,使得传统的处理方法遇到了挑战。本文首先从空间域反射波段的光学遥感图像入手,选择蚌埠涂山二长花岗岩、大别山二长花岗岩、淮南上窑寒武系馒毛组页岩和凤阳韭山馒毛组页岩四幅遥感影像子图像作为研究对象,利用傅里叶变换将遥感图像变换到频率空间,得到能量分布谱确定分形滤波器的阈值,借助这些阈值在频率域上运用不同的滤波器,并将其变换到空间域上以实现将异常和背景进行分离,达到遥感图像岩性信息增强的目的。     

“取经四众”的角色定位——阐释学视野中的《西游记》

《西游记》中师徒四人的形象已经深入人心,如果运用阐释学理论,把他们的取经事业放在今天考察,师徒四人的角色或许可以重新定位,四人在取经中所起的作用应该重新评价。就他们的个人能力以及对团队的贡献而言,唐僧可以担任董事长,孙悟空既可以担任董事长又可以担任CEO,猪八戒是既负责后勤又负责冲锋,沙僧则是保安。在这个团队中,正是由于每个岗位不同角色的通力合作,取经事业才取得了成功。     

Matlab小波分析在信号处理中的应用

本文在对傅立叶变换和窗口傅立叶变换以及小波变换比较分析的基础上,重点探讨了Matlab小波分析对普通信号进行分析、消噪、压缩和奇异点检测等信号处理中的各种应用,并提出一些自己的看法。