基于Matlab的各种数字调制方式仿真

本文根据通信原理课程教学内容中的各种数字调制基本框图,完成基于Matlab的仿真实现,对仿真过程中涉及的函数,仿真步骤进行详细说明,并给仿真波形结果,从而加强对调制解调的原理以及线性调制、信号带宽、成形滤波等基本概念掌握,为日后实现基于FGPA或DSP的硬件电路设计打好基础。     

基于连续Petri网的城市交通网络建模研究

建立了基于连续Petri网的城市交通网络模型。采用层次化的建模方法,首先构建整个交通网络系统的大框架模型,然后对其构成的关键要素——交叉口给出细化模型。交叉口模型清晰地描述了各个方向的交通流在道路交叉口处的转向行为和转向延误信息。体现路段阻抗和节点阻抗的时延因素的引入,使得模型能更加真实地反映交通网络的动态特性,为后续动态路径的诱导和交通控制提供思路。     

论南宋后期诗歌从宗唐到学杜的转变

南宋后期最早活跃在诗坛的是永嘉四灵和江湖诗派,他们从晚唐入手的创作方法表示了宋诗向唐诗的复归。这个时期成就较高的诗人是文天祥和汪元量,他们是这个阶段学杜最有成就的诗人,也普遍有以诗存史的观念,在他们身上实现了诗歌从宗唐到学杜的转变。文天祥创作的集杜诗取得了较高成就,他的集杜入乐也是一个创新。宋末的其他遗民诗人如林景熙、谢枋得、郑思肖等,其诗歌创作也有学杜之处,但文学创作的总体成就不高。     

虚拟参考咨询系统需求分析与建模——利用Rational Rose制作用例图

针对虚拟参考咨询系统开发的需求分析和需求建模的问题进行了研究。采用文献研究的方法,对虚拟参考咨询系统的服务方式、需求进行分析和归纳,运用UML的用例图对系统的需求进行了科学的表述,并运用Rational Rose建立起系统需求模型。     

财经类高校数学建模课程建设的设想与实践

以数学建模课程建设和数学建模竞赛为例，讨论了财经类高校数学建模课程建设的现状以及存在的问题，并提出了加强财经类高校数学建模课程建设的途径．     

UML建模在消防监督系统开发中的应用

统一建模语言UML(Unified Modeling Language)是面向对象软件开发方法的重要技术。本以消防监好检查系统为实例，展示了UML在进行软件设计构造阶段中，设计阶段模型和需求分析阶段模型之间的依赖关系。     

《自动控制原理》教学探讨

《自动控制原理》教学应突出两点：淡化推导、强化建模；以实验为手段，以课程设计为核心。     

Comparing Separate Process and Intertwined Models for Reactance

This investigation compares whether an intertwined or a separate process model better explains message failure incurred by threat to freedom. The current project extends the intertwined model proposed by Dillard and Shen (2005 Dillard , J. P. , & Shen , L. ( 2005 ). On the nature of reactance and its role in persuasive health communication . Communication Monographs , 72 , 144 – 168 . doi: 10.1080/03637750500111815 [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]) by considering the additional persuasive message elements of weak argument and insult. Results indicate that the intertwined model provides not only a better fit but also a more general model of message resistance than previously considered.     

Spreadsheet Modeling of () Inventory Policies

This teaching brief describes a method for finding an approximately optimal combination of order quantity and reorder point in a continuous review inventory model using a discrete expected shortage calculation. The technique is an alternative to a model where expected shortage is calculated by integration, and can allow students who have not had a calculus‐based statistics course to better understand how uncertainty affects inventory decisions.     

A Technology‐Enhanced Unit of Modeling Static Electricity: Integrating scientific explanations and everyday observations

What trajectories do students follow as they connect their observations of electrostatic phenomena to atomic‐level visualizations? We designed an electrostatics unit, using the knowledge integration framework to help students link observations and scientific ideas. We analyze how learners integrate ideas about charges, charged particles, energy, and observable events. We compare learning enactments in a typical school and a magnet school in the USA. We use pre‐tests, post‐tests, embedded notes, and delayed post‐tests to capture the trajectories of students’ knowledge integration. We analyze how visualizations help students grapple with abstract electrostatics concepts such as induction. We find that overall students gain more sophisticated ideas. They can interpret dynamic, interactive visualizations, and connect charge‐ and particle‐based explanations to interpret observable events. Students continue to have difficulty in applying the energy‐based explanation.