在线性规划教学中培养学生数学建模能力初探

本文主要阐述如何在线性规划教学中培养学生数学建模能力,让学生了解如何运用所学的线性规划知识去分析和解决实际问题,提高学生的应用能力和创新能力.     

基于模型的软件开发方法研究

计算机软件的开发经历了从面向过程、面向对象到面向领域的发展过程。本文针对该过程中几种典型基于模型的软件开发方法——Jackson方法、摸型驱动开发和面向领域建模进行深入探究,分析了各自的优缺点。     

专业虚拟社区知识贡献活动的制约因素作用机制研究

[目的/意义]探讨知识贡献活动的制约因素及其作用机制,为专业虚拟社区的未来发展任务提供实证支撑。[方法/过程]通过扎根理论的部分程序抽取开放式访谈得到的制约因素,借助解释结构模型和行动者网络理论分析制约因素的作用机制。[结果/结论]18个知识贡献活动的制约因素整体上形成了一个复杂的由多级层序结构组成的动态行动者网络,涉及用户心理和状态、用户体验、系统功能与设计、信息质量以及运营机制五类行动者。专业虚拟社区需要把握未来发展任务的轻重缓解,首先解决信息质量和运营机制等关键问题。     

数学建模教学和竞赛的实践与反思

通过开展数学建模教学和竞赛的实践,针对学生特点,总结介绍了一些具体做法,并对实践过程进行了反思。     

CAD技术在机械制图教学中的应用

本文通过对机械制图与CAD的关系分析,指出三维几何造型是制图课程教改的内容之一,利用多媒体在机械制图几何画法和绘制组合体三视图等教学过程中运用CAD软件三维几何造型,充分发挥学生想象力,提高学生识图和绘图能力,培养设计和创新意识等;通过CAD二维辅助和三维几何造型训练,学生不仅了解了CAD软件,且能够认识到这种现代工具进行工程设计的便捷、准确性,以及CAD技能对工科大学生的重要性。     

3DGIS在烟草农田管理中的应用及发展

伴随着计算机技术和GIS技术的发展,GIS技术在越来越多的行业中得到应用。介绍了三维地理信息系统（3DGIS）在烟草农田管理中的应用,展望了3DGIS在烟草农田管理中的应用前景,如结合GPS和RS技术,模拟烟草生长、烟草生产管理决策等,以提高烟草的产量。     

A Mixture IRTree Model for Extreme Response Style: Accounting for Response Process Uncertainty

This paper presents a mixture item response tree (IRTree) model for extreme response style. Unlike traditional applications of single IRTree models, a mixture approach provides a way of representing the mixture of respondents following different underlying response processes (between individuals), as well as the uncertainty present at the individual level (within an individual). Simulation analyses reveal the potential of the mixture approach in identifying subgroups of respondents exhibiting response behavior reflective of different underlying response processes. Application to real data from the Students Like Learning Mathematics (SLM) scale of Trends in International Mathematics and Science Study (TIMSS) 2015 demonstrates the superior comparative fit of the mixture representation, as well as the consequences of applying the mixture on the estimation of content and response style traits. We argue that methodology applied to investigate response styles should attend to the inherent uncertainty of response style influence due to the likely influence of both response styles and the content trait on the selection of extreme response categories.     

Latent Markov Factor Analysis for Exploring Measurement Model Changes in Time-Intensive Longitudinal Studies

When time-intensive longitudinal data are used to study daily-life dynamics of psychological constructs (e.g., well-being) within persons over time (e.g., by means of experience sampling methodology), the measurement model (MM)—indicating which constructs are measured by which items—can be affected by time- or situation-specific artifacts (e.g., response styles and altered item interpretation). If not captured, these changes might lead to invalid inferences about the constructs. Existing methodology can only test for a priori hypotheses on MM changes, which are often absent or incomplete. Therefore, we present the exploratory method “latent Markov factor analysis” (LMFA), wherein a latent Markov chain captures MM changes by clustering observations per subject into a few states. Specifically, each state gathers validly comparable observations, and state-specific factor analyses reveal what the MMs look like. LMFA performs well in recovering parameters under a wide range of simulated conditions, and its empirical value is illustrated with an example.     

Peer Teachers With Autism Teaching 3D Modeling

ABSTRACT

Few autism programmes address the needs of adolescents and young adults, and those that do are unlikely to include individuals with autism in the design and evaluation of the programme. This study involved nine youth with autism (ages 16–25) in the development and evaluation of a peer teaching programme where they taught three-dimensional modelling to other students with autism spectrum disorder. The methodology was participant-oriented research where the students with autism were co-designers and programme evaluators in the research. This approach highlighted their unique strengths and abilities and shifted the power such that they were leaders and not simply the recipients of knowledge from instructors. Four themes emerged through the qualitative analysis of the students’ perceptions of the peer teaching programme: 1) the meaning of peer teaching, 2) motivations for peer teaching, 3) challenges and 4) coping with the challenges of the role.     

Particles in a Box with One Sticky Wall: From ODE to PDE

Abstract

We present noncompetitive adsorption as “particles in a box with one sticky wall.” We start with a general model that can be modeled as a simple ordinary differential equation (ODE). To verify the ODE students run a computer simulation. The ODE’s solution imperfectly fits the simulation’s data. This leads to the diffusion partial differential equation. We show how to determine the diffusion constant from theory; how to determine how many terms in the Fourier series solution need to be summed; and the use of nonlinear regression. As a bonus, the physics of the model will lead us to a series representation of π.