C++面向对象程序设计中的二义性及其解决方法

C++语言是一种使用非常广泛的计算机编程语言,它支持过程化程序设计、数据抽象、面向对象程序设计、制作图标等多种程序设计风格.在C++面向对象的程序设计中,多继承使用频繁,然而使用多继承容易出现二义性问题.本文结合自己这几年的教学经验,通过分析教材和一些参考书中的二义性例题,总结出C++中容易出现二义性的情况及解决方法.     

面向对象软件工程的UML方法

分析了面向对象软件工程的优点 ,介绍了UML方法 ,给出UML方法的图形表示法 ,最后介绍了UML方法软件分析与设计的具体步骤     

Time to seize the digital evolution: Adoption of blockchain in operations and supply chain management among Malaysian SMEs

This study aims to investigate the effects of relative advantage, complexity, upper management support, cost, market dynamics, competitive pressure and regulatory support on blockchain adoption for operations and supply chain management among Small-Medium Enterprises (SMEs) in Malaysia. Unlike existing studies that employed linear models with Technology Acceptance Model or United Theory of Acceptance and Use of Technology that ignores the organisational and environmental factors, we adopted the Technology, Organisation and Environment Framework that covers the technological dimensions of relative advantage and complexity, organisational dimensions of upper management support and cost and environmental dimensions of market dynamics, competitive pressure and regulatory support. Empirical data from 194 SMEs were investigated and ranked using a nonlinear non-compensatory PLS-ANN approach. Competitive pressure, complexity, cost and relative have significant effects on behavioural intention. Market dynamics, regulatory support and upper management support were insignificant predictors. SMEs often lack resources for technological investments but faces same requirements for streamlining business processes to optimise returns and blockchain presents a viable option for SMEs’ sustainability due to its features of immutability, transparency and security that have the potential to revolutionise businesses. This study contributes new knowledge to the literature on factors that affect blockchain adoption and justifications were discussed accordingly.     

The Use of Representations and Argumentative and Explanatory Situations

This paper discusses the use of non-verbal representations in a modelling-based science teaching context, in which argumentative and explanatory situations occur. More specifically, we analyse how the students and teacher use representations in their discourse in modelling activities, and we discuss the relationships between the functions of these representations and the demands of the explanatory and argumentative situations that exist in that classroom. The data were collected by video recording all the classes in which a teaching sequence about intermolecular interactions was used—a topic which the students had not previously studied. In the activities, the students had to create, express, test, and discuss models in order to understand the difference between intermolecular and interatomic interactions, as well as their influences on the properties of substances. Initially, we selected excerpts of the recorded classes in which a non-verbal representation was used. Then, we used criteria to identify the argumentative and explanatory situations (previously defined), and we created categories for the functions of the representations that were used in order to analyse all the identified situations. The analysis supports conclusions indicating the relevance of the use of non-verbal representations in the construction, use, and defence of explanations. As the defence of explanations was the main context in which argumentative situations occurred in this study, our conclusions also indicate the contribution that representations make towards changing the status of the students' explanations.     

Design science research – a powerful tool for improving methods in engineering education research

ABSTRACT

Modelling is a central activity in practical engineering and something that is also useful in engineering education research (EER). Additionally, qualitative research methods have found important applications in engineering research, although their use in EER has not always been widely accepted. Design science research is a qualitative research approach in which the object of study is the design process, i.e. it simultaneously generates knowledge about the method used to design an artefact and the design or the artefact itself. This paper uses techniques from design science research to analyse the method used when deriving the ‘learning of a complex concept’ (LCC) model, which we developed while designing teaching sequences for a course on electrical engineering. Our results demonstrate the value of design science research in EER and suggest that the LCC model is generally applicable in this field.     

软件设计阶段基于UML的SFMEA方法研究

软件失效模式与影响分析(SFMEA)是提高软件可靠性与安全性的重要手段之一,近年来在很多领域得到了越来越多的应用。当前,面向对象方法已成为国内外软件设计的主流,UML亦已成为软件界统一的建模语言。因此,基于UML的SFMEA分析方法对面向对象软件来说具有重要意义。本文对基于UML建模软件的SFMEA方法进行研究,分析在软件开发过程的早期——设计阶段使用UML建模元素的特点,建立了顺序图和类图与SFMEA分析要素之间的关系,提出了一套分析方法,并进行了实例验证。     

浅论微机仿真系统的设计方法

讨论了微机仿真软件设计中的基本问题,阐述了中使用形式化方法进行规格说明的基本原则,以及面向对象的方法和UML在设计中的重要作用     

面向对象的武汉市街区公共遥感影像分类研究

面向对象的遥感影像分类方法克服了传统基于像元分类方法的弊端,将对象光谱、空间纹理等特征一并加入分类依据中,有效避免了“同谱异物”或“异物同谱”的问题,适合于高分辨率的遥感影像分类。以武汉市某街区公共遥感影像为例,采用上述方法,结合支持向量机分类方法进行地物分类识别,结果显示,分类总体精度达到了89．9913％,取得了良好的分类效果。     

UML在高校选课系统中的应用

UML是一种可视化、图形化的面向对象建模语言。先对UML方法作了简要的介绍,然后在对学生选课系统进行需求分析的基础上,探讨了用UML对该系统进行建模的主要方法,并给出了具体的模型和框架。