基于二进制代数学的关灯游戏模型

利用二进制代数学给出了一个关灯游戏的数学模型,对基于有限域上的线性方程组的9阶情形给出了所有解,并进一步运用代数学中的陪集分类方法给出了游戏的等价类,便于游戏者判断和解决游戏问题。     

基于交通信息的通勤出行链模式选择行为

为探索通过智能手机等通信工具随时随地获得的交通信息对居民通勤出行链模式选择行为的影响,采用RP(Revealed Preference)调查获取出行者的社会经济属性、交通信息使用属性以及通勤出行链模式选择行为数据,用信息查询频率度量出行者的交通信息使用属性,建立估计通勤出行链模式的二项Logit模型.研究发现:(1)交通信息在促进复杂链的生成上发挥着较大的作用;(2)在交通信息的作用下,停车换乘(Park and Ride,PR)方式比公共交通和小汽车都更能促进复杂链的生成;(3)出行者的性别、婚姻状态、家中是否有12周岁以下儿童等对出行链模式选择不会有显著影响.     

Understanding participant and practitioner outcomes of environmental education

Environmental education can deliver benefits to individuals, society and the environment, but few studies have asked practitioners or participants what they feel these benefits are. This research compares the perspectives of practitioners and participants in environmental education projects, using questionnaires, focus groups and participant observation. Practitioners and participants listed a large number of outcomes, with increasing knowledge about the environment mentioned most frequently. For participants, this was often in relation to gaining new skills. Social outcomes, such as making new friends, were more prominent in participant than practitioner responses. Practitioners did not spontaneously mention any negative outcomes of environmental education, and few were suggested with prompting. Participants suggested more negative outcomes than practitioners, notably damage to the environment. The differing views suggest a need for greater discussion between practitioners and their participants.     

完善我国农村社会保障制度的路径探析

农村社会保障制度是我国社会保障制度的重要组成部分,是全面推进小康社会的重要内容。但是由于体制方面、立法方面、思想观念方面的原因,我国农村的社会保障制度在各个方面都还很不完善．这就使得农民的权益得不到有效的保障。农民的现状没有发生本质的变化。而造成这种现象的根衣原因是中国二元的社会结构.因此．我国需要根据现实情况从立法、体制以及思想观念等方面来完善农村的社会保障制度．并且从体制上逐步摆脱二元的社会结构．实现城乡社会保障体系的一体化,最终使广大农民的权益得到有效保障。     

国外基于任务的信息交互研究现状与进展

[目的/意义]本文旨在对国外基于任务的信息交互(Task-Based Information Interaction, TBII)的研究成果进行系统的综述,并以此为基础构建TBII的集成化研究框架。本研究有利于为今后探索TBII的研究提供理论基础。[方法/过程]基于文献调研的方法,对国外基于任务的信息交互研究的现状与进展进行了归纳总结。[结果/结论]研究发现国外学者对于该主题的研究涉及TBII基本概念、TBII阶段的划分、TBII子活动的影响因素和TBII活动完成的影响因素四个主题。研究构建的TBII集成化研究框架将以上四个主题按照一定的逻辑关系进行整合。该框架的功能如下:第一,可以揭示TBII各活动阶段的交互关系;第二,可以识别出用户、任务、TBII活动阶段、信息系统及任务产出、效果、绩效之间的关系机理;第三,提出了TBII研究的四种基本研究路径。     

Exploring learning and fit in the transition from higher education to the labour market: A systematic review

The transition from higher education to the labour market is an important period for youngsters, characterised by extensive changes which act as triggers for learning. Furthermore, students’ educational background and the (in)congruence with their work context is important. Accordingly, the aim of this systematic review is to explore the role of learning and fit in the transition process. Results indicate that most emphasis is put on theoretical knowledge, communication, problem-solving, and learning skills. Although the perception on what has to be learned differs for employers, educators, and graduates, each group valued generic competences most. Results show that transfer can be experienced in three ways and the need for learning at work is stressed. Concerning fit, four types of fit are distinguished: vertical, horizontal, competence, and person-environment fit. Several personal background characteristics are shown to influence fit and findings indicate that fit has an influence on career progress and personal resources.     

A Second-Order Longitudinal Model for Binary Outcomes: Item Response Theory Versus Structural Equation Modeling

Measuring academic growth, or change in aptitude, relies on longitudinal data collected across multiple measurements. The National Educational Longitudinal Study (NELS:88) is among the earliest, large-scale, educational surveys tracking students’ performance on cognitive batteries over 3 years. Notable features of the NELS:88 data set, and of almost all repeated measures educational assessments, are (a) the outcome variables are binary or at least categorical in nature; and (b) a set of different items is given at each measurement occasion with a few anchor items to fix the measurement scale. This study focuses on the challenges related to specifying and fitting a second-order longitudinal model for binary outcomes, within both the item response theory and structural equation modeling frameworks. The distinctions between and commonalities shared between these two frameworks are discussed. A real data analysis using the NELS:88 data set is presented for illustration purposes.     

对双液系T-X相图理论计算的讨论

在前文的基础上,考虑温度对蒸发焓的影响,进一步导出了理想双液系液-气平衡时两相的组成与温度的定量关系。以Pb-Sn系统为实例,利用Excel 2003进行了计算,方法简便,结果满意。     

对《档案法》修订草案的几点建议——基于取消设定档案公布权之理论探讨

长期以来,我国《档案法》一直奉行建立公共档案利用与公布的二元制度.随着社会主义市场经济体制的确立,政府职能向公共服务、社会管理等方面转变,档案公布权的设定越来越不适应档案开放利用工作发展的需要.故在新一轮的《档案法》修订中,一方面,有必要考虑废止开放范围内的档案公布权,取消开放范围内档案公布主体的限制,鼓励社会各界参与...     

由后序序列和结点的双亲情况构造严格二叉树的非递归算法

提出一种新的由一棵严格二叉树的后序序列和结点的双亲情况构造该严格二叉树的非递归算法。通过实例说明该算法的执行过程,假设n是严格二叉树的结点的个数,该算法的时间复杂度和最差情况空间复杂度都是O（n）。