Authoring for simulation-based learning

This paper describes the SAM (Simulation and Multimedia) project and the rationales behind it. SAM focuses mainly on integrated simulation-based learning environments and creates a framework for authoring, modelling and learning. In these frameworks existing software tools are used where possible and an exchange of tools is enabled. Specialised tools support all actors: learners, authors and modellers. Emphasis will be put on methodologies and graphical tools supporting global course design and integration of simulations. Tools enable also the implementation of general and local course control including instructions for the monitor to recognise and evaluate learner behaviour.SAM methods and techniques are developed to design adaptable courses to meet different learner profiles and to integrate simulations in courseware. This implies a technical integration: the simulation package must accept external control and support an exchange of data. It also implies a conceptual integration: instructional domain concepts must be connected with the model entities; variables, parameters and relations.     

A Simulation Study on A Diesel Engine Assembly Line

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混沌时间序列及MATLAB仿真实现

在非线性系统中,存在着一种非常特殊的系统,即混沌系统,是一种介于确定关系和随机关系之间的状态。文章首先阐述了混沌的基本概念,然后对嵌入维数m和延迟时间τ这两个参数的选取方法做了简要介绍;列举了几个典型的混沌模型,并运用MATLAB软件对其进行仿真实现。     

船舶性能实验教学系统

船舶性能实验教学系统是船舶性能实验课的导学、助学、自测及自检系统,它集基本理论、扩展知识、教学实验、数据采集、实验仿真和实船预报于一体,使得相关课程的教学及实验得到了强化和扩展。本系统运用VisualBasic程序设计语言,采用了面向对象的设计方法,结合可视化设计技术,使得该系统具有良好的可维护性、扩展性和开放性。     

GAMS仿真在宏观经济学教学中的应用——以IS—LM模型为例

文章以IS—LM模型为例,探讨了GAMS仿真在宏观经济学教学中的应用。具体的政策模拟可分为四个方面：（1）财政和货币政策分别对均衡国民收入、利率、消费和投资的影响;（2）财政和货币政策混合的综合影响;（3）IS和LM曲线斜率对财政和货币政策效果的影响;（4）实现经济目标的政策选择。GAMS仿真的结果不仅进一步验证了IS—LM模型的基本结论,同时也更为直观地体现了政策变动对经济的各种影响,研究结果对实验经济学在中国的应用与推广具有一定的参考价值。     

利用DELPHI实现密立根实验的仿真

介绍采用面向对象的编程环境DELPHI实现密立根油滴实验的仿真的原理,并提供重要的程序片断。     

过程控制系统综合性实验设计与教学实践

将分散的过程控制课内实验,按其内在联系与顺序进行内容的串联与综合,将Matlab仿真引入过程控制系统实物装置实验,以实测得到的实验对象模型为仿真原型,按照控制系统装置的实际情况构建Simulink仿真模型进行Matlab仿真,再用仿真得到的控制参数选取实验参数。设计的实验包括模型测试、简单系统实验和复杂系统实验,实验手段采用Matlab仿真与实物实验相结合的综合性实验,以提高实验效率与教学效果。以液位串级控制系统综合性实验教学实例,阐述了实验教学方法。     

A Research in the Influences of Vague Language on Second Language Learning

Vague language is widely used in both spoken and written English and it is also a very important language variable. The process of language use is active, during which speakers and hearers constantly have to make choices out of variables. This paper mainly studies the influences of vagueness in language on second language learning and attaches importance to the flexible selections of vague language in the target language.     

单偏好随机网络演化模型

为了进一步探求复杂网络的形成机制,文章提出了一种B A(Barabási-A lbert)模型的扩展模型,考虑网络节点增加的同时,网络内部演化对网络发展的影响.该模型不仅包含加点、加边两种外部演化;而且还包含重连和删边两种内部演化,在每个时间步的操作中,新引入结点的度、重连的边数都是随机的.针对单偏好依附网络模型,运用连续性理论及随机分析理论证明,如果适当选取模型参数,这种网络自演化为无标度网络.而且验证了分析的结果与计算机模拟具有很好的一致性.     

MATLAB在控制系统仿真教学中的应用

阐述系统仿真技术和MATLAB语言的特点及两者之间的关系,并以实例说明在控制系统仿真课程中引入MATLAB的易学性和实际意义。     

输气管道仿真教学系统的研发

介绍了输气管道仿真教学系统的构成和功能。在开发过程中,使用VC 来编制计算程序,根据已建立的各种数学模型对天然气长输管道系统的动态过程参数进行计算;同时使用工业组态软件来制作图形界面和建立数据库,将数据库中的变量与图形界面中的各图元相连接,通过实时更新数据库来驱动画面。这种仿真系统是操作者掌握天然气长输管道动态运行时全线压力过程的变化和对全线的监控的一个有效工具。     

An educational laboratory virtual instrumentation suite assisted experiment for studying fundamentals of series resistance–inductance–capacitance circuit

One of the most elementary concepts in freshmen Electrical Engineering subject comprises the Resistance–Inductance–Capacitance (RLC) circuit fundamentals, that is, their time and frequency domain responses. For a beginner, generally, it is difficult to understand and appreciate the step and the frequency responses, particularly the resonance. This paper proposes a student-friendly teaching and learning approach by inculcating the multifaceted versatile software LabVIEW^TM along with the educational laboratory virtual instrumentation suite hardware, for studying the RLC circuit time and frequency domain responses. The proposed approach has offered an interactive laboratory experiment where students can model circuits in simulation and hardware circuits on prototype board, and then compare their performances. The theoretical simulations and the obtained experimental data are found to be in very close agreement, thereby enhancing the conviction of students. Finally, the proposed methodology was also subjected to the assessment of learning outcomes based on student feedback, and an average score of 8.05 out of 10 with a standard deviation of 0.471 was received, indicating the overall satisfaction of the students.     

基于MATLAB控制系统仿真分析软件的开发与应用

介绍了在MATLAB提供的GUI(guide)工具的可视化环境下,通过采用基于对象的设计,开发了自动控制系统的计算机辅助设计与仿真分析软件.经应用验证该软件具有操作简便、界面友好、功能完善等特点,为提高控制系统性能分析与设计效率,提供了一种高效实用的仿真工具.     

无复位开关的单周控制新方法研究

采用积分复位的单周控制方法在变换器控制领域得到了广泛的研究。但是,由于它采用了积分复位开关,使其变成了一个十分复杂的非线性控制系统,建模和系统设计都非常困难。本文在分析单周控制方法基本原理的基础上,提出了无复位开关的单周控制新方法,以Buck变换器为例,建立了控制系统的小信号模型,通过理论分析和仿真结果证明了该方法的正确性。     

Conducting Simulation Studies in Psychometrics

Simulation studies are fundamental to psychometric discourse and play a crucial role in operational and academic research. Yet, resources for psychometricians interested in conducting simulations are scarce. This Instructional Topics in Educational Measurement Series (ITEMS) module is meant to address this deficiency by providing a comprehensive introduction to the topic of simulation that can be easily understood by measurement specialists at all levels of training and experience. Specifically, this module describes the vocabulary used in simulations, reviews their applications in recent literature, and recommends specific guidelines for designing simulation studies and presenting results. Additionally, an example (including computer code in R) is given to demonstrate how common aspects of simulation studies can be implemented in practice and to provide a template to help users build their own simulation.     

The Language Styles in The Adventures of Huckleberry Finn

This article mainly discuss the language styles in The Adventures of Huckleberry Finn. Colloquial and satire are important language styles in this book. Vanity unquestioning acceptance of violence coward and slave all satire the great national problems; Besides, combination of the colloquial language and satire is also very successful in this novel, which vividly reveal the American society at that time .     

基于网络的密立根油滴实验仿真

阐述了密立根油滴实验仿真开发中实物模型的建立过程，并给出网络中图像传输瓶颈问题的解决方案，提高了仿真实验的实时性、真实性和可操作性，使得仿真实验具有更强的教学实用性。     

The theory of figural concepts

The main thesis of the present paper is that geometry deals with mental entities (the so-called geometrical figures) which possess simultaneously conceptual and figural characters. A geometrical sphere, for instance, is an abstract ideal, formally determinable entity, like every genuine concept. At the same time, it possesses figural properties, first of all a certain shape. The ideality, the absolute perfection of a geometrical sphere cannot be found in reality. In this symbiosis between concept and figure, as it is revealed in geometrical entities, it is the image component which stimulates new directions of thought, but there are the logical, conceptual constraints which control the formal rigour of the process. We have called the geometrical figuresfigural concepts because of their double nature. The paper analyzes the internal tensions which may appear in figural concepts because of this double nature, development aspects and didactical implications.     

基于Eclipse RCP的曲柄滑块机构运动仿真系统研究

采用Eclipse RCP和SWT,利用Java语言采用面向对象的设计方法,以曲柄滑块机构的运动仿真为例,实现了仿真建模、仿真系统设计、仿真结果输出和仿真数据采集等功能,从而为独立的和跨平台应用的仿真系统设计与实现提供一种高效、快捷的方法。     

Numerical Analysis of Influencing Factors on Temperature Field and Airflow Distribution of the Displacement Ventilation System

Indoor air quality and thermal comfort are important features of indoor environment, In this paper, a numerical simulation based on the k-ε model of CFD is used to analyze factors such as loading, exterior-protected construction, blowing-in rate that play an important role in the temperature field and airflow field of the displacement ventilation system. Exterior-protected construction has little influence on indoor temperature distribution of displacement ventilation systems and the influence is limited only in a small area near the external wall when the indoor heat source is the main cooling load. The height of a room has little influence on indoor temperature field, and the temperature gradient of active region is basically unchanged. In the system combined with a displacement ventilation system and a cooling system, the height also has little influence. When the cooling load is high,the indoor heat source creates a strong convective plume, which will make the average indoor air age lower, the ventilation efficiency higher and the elimination of pollutant easier. Air supply rate plays an important role in displacement ventilation systems. The increase of air supply rate that can be realized by increasing the air supply velocity and enlarging the area of air inlet will increase the mass capability of the system and diminish the vertical temperature gradient. From the comparison between simulations and experiments, it is concluded that this simulation are creditable.