旅游者人数变动的统计预测分析

旅游业是一个波动性较强的产业，由于受旅游市场多种因素的影响，往往导致旅游目的地和旅游景点旅游人数经常发生变动，因此对旅游人数进行统计、分析和预测有助于调节旅游市场的供求平衡，合理安排和开发旅游景点，做好旅游接待工作。本通过使用一些统计预测模型及相应的预测方法，对旅游的人数变动、流向变动和季节变动进行了一定的统计、分析和预测，对旅游业实践具有一定的指导意义。     

Android平台下恶意软件分析与检测

针对Android平台下恶意软件侵扰问题,提出一种基于权限—敏感API特征的加权朴素贝叶斯分类算法的检测方案。首先对Android应用程序中的配置文件进行解析,然后利用Apktool工具对APK文件进行反编译,提取出权限—敏感API特征集,并通过信息增益算法和卡方检验算法过滤冗余数据,最后利用加权朴素贝叶斯分类算法的恶意软件检测模型进行分类判断。实验结果证明,该系统能有效提高分类器的效率和恶意软件的检测率。     

概率实验

概率 ,在科学实验、生产实践及日常生活中有着广泛、直接的应用。因此 ,在教学过程中 ,并非一味简单地讲述书本知识。而适时、恰当地设计、引导学生主动参与课堂、课下的概率实验 ,以实验结果来论述问题 ,体现以学生为主 ,以应用为本的教学理念。使抽象的数学教学进行得生动活泼 ,取得了让学生终身难忘的教学效果     

Does prior mathematics knowledge really lead to variation in elementary statistics performance? Evidence from a developing country

A model incorporating prerequisite mathematics performance and other variables deemed to be associated with learning elementary statistics (ES) is developed. The relationship between ES performance and the explanatory variables is well represented by the logistics form. Aptitude, effort and motivation are the only significant explanatory variables of ES performance. Since prerequisite mathematics is not significant, statistical thinking at the tertiary level may be mostly intuitive and non-mathematical. Students with low aptitude experience increasing returns to effort over the first half of the feasible effort interval, while high-aptitude students experience diminishing returns at all levels of effort. The levels of effort required to achieve a minimum pass are interpreted.     

论新时期教育统计信息管理的创新

随着社会的不断发展和教育改革的不断深入,教育统计信息在科学管理、宏观决策、监督制约中的作用越来越大,因此,加强教育统计信息管理意义重大。针对新时期社会的发展对教育统计信息的新要求,本文从教育统计信息管理的机构设置、数据标准化等几个方面探索了教育信息管理的创新。     

基于局部投影统计法的螺纹缺陷检测

为解决传统接触式螺纹测量方法费时且程序冗长的缺陷,提出一种基于机器视觉技术的螺纹缺陷检测算法。对捕获的螺纹图像进行中值滤波、迭代法二值化与Canny边缘提取处理|通过分析螺栓图像中螺纹缺陷断口位置灰度值的变化,提出一种基于DOG模型的螺纹自动检测方法。为验证该算法性能,用基于形状的模板匹配算法作为对照进行实验。结果表明,局部投影统计算法能有效提取螺纹缺陷图像的缺陷信息,螺纹缺陷图像识别率在95%以上。该方法可快速有效地降低噪声,准确迅速地定位缺陷点,提高生产线螺栓可替换性。     

图书馆信息服务热点问题探究

对5种图书馆专业核心期刊2003—2005年服务类论文的发文情况进行统计，从中发现图书馆服务技术、服务模式和服务方法及图书馆服务现状、趋势和实践问题是图书馆服务领域的研究热点。     

Investigating populations via penguins and their poo!

We describe an activity that introduces students to population modelling, enables them to use estimates obtained from a sample to infer back to the population, and understands how the findings are translatable via penguins and their poo!     

Statistical investigation measuring intelligence and creativity

The use of statistical investigations as a teaching strategy have been shown to both motivate and engage students. The implementation of a statistical investigation to measure intelligence is described, covering core statistical principles and key elements of research design.     

Calculated democracy—Explorations in gerrymandering

This paper describes a lesson centered around a metric for measuring partisan gerrymandering: the efficiency gap. We situate the efficiency gap in the current US political climate, describe the activity itself, and then provide recommendations for readers interested in adapting the lesson for their own classrooms.