贝叶斯方法在电信CRM中的应用

本文考虑了根据样本数据建立贝叶斯信念网络构造算法在电信CRM中的应用,并对电信10000个样本进行了挖掘、分析、评估.     

Mathematical Modeling in the Primary School: Children's Construction of a Consumer Guide

This paper examines 6th grade children's local conceptual development and mathematization processes as they worked a comprehensive mathematical modeling problem (creating a consumer guide for deciding the best snack chip) over several class periods. The children and their teachers were participating in a 3-year longitudinal teaching experiment in which sequences of mathematical modeling problems were implemented from the 5th grade (10 years of age) though to the 7th grade. In contrast to traditional problem solving, mathematical modeling requires children to generate and develop their own mathematical ideas and processes, and to form systems of relationships that are generalizable and reusable. Reported here is a detailed analysis of the iterative cycles of development of one group of children as they worked the problem, followed by a summary of the mathematization processes displayed by all groups. Children's critical reflections on their models are also reported. The results show how children can independently develop constructs and processes through meaningful problem solving. Children's development included creating systems for operationally defining constructs; selecting, categorizing, and ranking factors; quantifying quantitative and qualitative data; and transforming quantities.     

水口电厂电能计量管理系统中的数据采集

数据采集系统中,系统的稳定性及快速性是两个重要的因素.以水口电厂电能计量管理系统中的数据采集为例,来分析如何用工控机配上Com口扩展卡,采集多块MK3电能表上的数据以提高系统的稳定性及提高数据采集的速度.     

用Javabean构建数据过滤的Script代码生成器

针对asp或jsp的客户端数据过滤程序代码由手工编写,编程效率低的缺点,提出了用脚本代码生成器实现自动生成数据过滤代码的方法。生成器的主要组件是Javabean,它可以连接到不同的数据库并操作数据表,在提取数据表的字段结构信息后,由用户选择需要过滤的字段,生成器能根据数据表的结构参数匹配bean中的相关过滤函数,最后生成具有数据过滤能力的客户端脚本代码文档。将生成器用于Web程序的开发,不仅能减少开发人员在编写、测试和修改代码工作量,而且能及时跟踪数据库(表)设计的改变,脚本代码生成高效、自动、准确。     

基于数据驱动原理的新型计算机系统结构的可行性分析

本文通过对传统的基于存储程序原理的冯·诺依曼计算机和基于数据驱动原理的新型计算机系统结构的数据流计算机的比较以及对数据流计算机的性能的分析,得出这种还处在萌芽阶段的数据流计算机是可行的,也是具有发展潜的.     

Examining Intermediate Omitted Levels in Hierarchical Designs via Latent Variable Modeling

This article outlines an interval estimation procedure that can be used in a 3-level setting to evaluate the proportion of outcome variance attributable to the second level of clustering. The method is useful for examining the necessity of including a possibly omitted intermediate level of nesting in analyses of data from a multilevel study, and represents an informative addendum to current statistical tests of second-level variance. The approach is developed within the framework of latent variable modeling and can be used as an aid in the process of choosing between 2-level and 3-level models in a hierarchical design. The discussed procedure is illustrated with an empirical example.     

Making sense of learner and learning Big Data: reviewing five years of Data Wrangling at the Open University UK

Most distance learning institutions collect vast amounts of learning data. Making sense of this ‘Big Data’ can be a challenge, in particular when data are stored at different data warehouses and require advanced statistical skills to interpret complex patterns of data. As a leading institute on learning analytics, the Open University UK instigated in 2012 a Data Wrangling initiative. This provided every Faculty with a dedicated academic with expertise data analysis and whose task is to provide strategic, pedagogical and sense-making advice to staff and senior management. Given substantial changes within the OU (e.g. new Faculty structure, real-time dashboards, two large-scale adoptions of predictive analytics approaches, increased reliance on analytics), this embedded case study provides an in-depth review of lessons learned of five years of data wrangling. We will elaborate on the design of the new structure, its strengths and potential weaknesses, and affordances to be adopted by other institutions.     

科学计算中辅助技术探讨

科学计算中辅助技术是计算机科学发展到一定阶段而提出的一个很有实际意义的课题．本文针对科学计算过程探讨了工程数据库技术和可视计算技术     

XML安全技术在石材信息检索系统中的应用

XML是一种面向数据的标记语言,具有结构严谨,简单易用等优点,己成为数据交换的标准．本文首先阐述了XML的特点,语言规范和应用领域,然后从XML加密,XML数字签名,以及XML公钥管理技术三个方面对XHL的安全技术进行了讨论。并组建了XML数据交换平台架构．在此基础上,给出了XML安全技术在石材信息检索系统中的应用．以及系统的需求分析和功能模块设计．     

基于行波测距的电缆故障测试装置的研究

介绍基于行波测距的电缆故障测试装置的原理、结构及其设计方案。选择C类方法进行实现,设计脉冲发送电路及脉冲接收电路,在高速数据采集的支持下,完成对电缆故障定位。