Design and development of a fuzzy agent-based model to measure interest rate expectations

The financial system, which has been investigated by various researchers, is a rather complicated environment. Most research has only been concerned with quantitative factors (technical indexes), though qualitative factors (e.g., political situation, social conditions, international events, government policies, among others) play a critical role in the financial system environment, determining the regulatory policies within an economy. This paper presents a fuzzy knowledge-based model to measure the qualitative aspects related to one of the most important financial instruments used to regulate an economy, the base interest rate. The development and assessment of the proposed model was based on the Brazilian economy. Evaluation of the results obtained indicates that our approach gives good results when compared with real data and statistical-based forecasting tools. The main advantage of our approach is its capability to forecast long term interest rate expectations when combined with a powerful econometric model.     

基于肤色检测的AdaBoost人脸检测算法改进

AdaBoost人脸检测算法用于嵌入式实时高清视频时检测速度缓慢.为此,提出一种改进的人脸检测算法.对图像做肤色检测,将检测到的区域进行形态学处理,并作为感兴趣区域,完成AdaBoost人脸检测,以得到检测结果.实验结果表明,该算法在嵌入式系统上运行稳定,能提高检测速度和检测正确率.     

决策树分类算法在个性化图书推荐中的应用

采用数据挖掘中的决策树方法,对图书馆的图书借阅数据进行研究和分析,提出了基于读者阅读兴趣的个性化图书推荐模型。实验表明,该模型能够为新老读者有针对性地推荐新书,较好地实现了图书馆的个性化的创新服务。     

独立学院非计算机专业VFP课程趣味性教学探讨

基于独立学院非计算机专业学生的特点,本文采用趣味性教学,从教学语言、教学内容、教学方法等方面增趣添味,给学生营造快乐的教学情境,激发学生的学习兴趣,从而优化课堂教学,提高教学效果。     

高职高专数学案例教学刍议

高等职业教育的主要任务为高职高专的数学教学提出了新的要求，而案例教学这一新型的教学模式在这方面有着特殊的优势，并且设计和开展高职高专数学案例教学的可行性很大。     

A general fan-beam reconstruction algorithm for free-form trajectories

In this paper we develop a general exact fan-beam reconstruction algorithm for free-form trajectories not only closed but also unclosed, based on the fan-beam reconstruction formula recently developed by Noo et al.. A mathematical proof is then provided with the geometrical explanation of equi-spatial detectors. With this algorithm we can obtain exact region of interest (ROI) reconstruction if and only if every projecting line passing through the ROI intersects the free-form source trajectory, when the projections are not truncated. Furthermore, under the condition that the source-to-detectors distance changes slowly enough relative to the length itself, we obtain a very good approximate reconstruction algorithm, which is the same as the algorithm of the circular trajectory except that the source-to-detectors distance is a function of the rotation angle. Then the algorithms are tested using the Shepp-Logan phantom and the experiment shows that the algorithms can get perfect numerical results.     

谈英语课堂教学中的准备活动

要激发学生对英语课堂的兴趣，有效地利用好英语课堂，教师应组织一些集学习和兴趣于一体的准备活动。本从多方面论证了准备活动的必要性与可行性并提出了建议和方法。     

一种基于局部最大熵的特征匹配算法

传统的基于灰度的匹配算法抗噪声能力和抗局部几何变形能力较差，通过图像熵变换，提出了一种新颖的基于局部最大熵的特征匹配算法；通过局部特征点所在区域的相关匹配，获得具有最大可信度的匹配结果。由于匹配只是在特征点之间进行，且在匹配过程中引入外极线和一致性约束条件，从而大大降低了计算消耗和误匹配率，获得了比较理想的表面离散深度图。