基于MRAC的矿山电动轮加油系统研究

以矿山电动轮汽车润滑油加油系统为研究对象,本文提出了一种基于Liapunov稳定性理论的模型参考自适应控制(MRAC)方法。分析了该加油系统的结构特点,建立对应数学仿真模型,再利用超稳定理论推导出加油系统自适应控制律,利用Matlab/Simulink对该数学模型进行仿真。模型仿真结果说明,该系统具有较高的稳态精度和较强的鲁棒性。     

EWB软件在《高频电子技术》实验中的应用

本文介绍了EWB仿真软件的特点及其在《高频电子技术》课程教学中的具体应用,将传统的实验方法与EWB的相结合,还可以使学生对新知识产生浓厚的探索兴趣,能有效地提高实验教学质量。     

风险价值评估方法的比较及应用

本文主要介绍风险价值的背景及其应用,以及VaR模型及其计算方法。在此基础上,利用具体实例比较各类方法的优劣。     

基于Proteus的电子节气门控制系统仿真和实验

本文以Proteus软件为基础,在Proteus软件与Keil整合构建的单片机虚拟仿真环境下,检测节气门的信号,通过电子控制单元的计算,输出给步进电机的驱动芯片,根据步距角计算出脉冲数,完成对步进电机的驱动控制,从而实现节气门迅速地获得预期的开度。文章在对电子节气门控制系统仿真的基础上,进行了实物实验,获得较好的效果。     

Analysis of a rainwater harvesting system for domestic water supply in Zhoushan, China

The domestic rainwater harvesting system （DRHS） is an water demands. A computer model has been generated to analyze the important freshwater source for Zhoushan, China to meet performance of the DRHS with different ratios of D/（AR） （water demand/average annual collected runoff） and S/（AR） （storage capacity/average annual collected runoff）. The performance of the DRHS was analyzed by means of the model simulation, which is described by its water shortage rate （WSR） and water loss rate （WLR）. Using the data, a set of dimensionless design calculation chart is introduced. When the water demand and requirement of the design are known, the established chart can be used to easily determine the storage capacity and catchment （roof and other surface） area required to achieve a desired performance level.     

民族院校公共课教育学模拟教学初探

民族院校公共课教育学模拟教学形式，即在现有的课时内，在教师基本完成教学理论部分的传播后，由学生按规定独立准备教案，并以本班为模拟对象，依次上台试讲的教学实习活动。任课教师应克服各种困难，解决民族院校师资培养工作的难题。     

Regression Models with Errors in the Predictor Variable

In this article Simon Day describes a computer simulation exploring one of the fundamental assumptions of regression analysis which causes students difficulties.     

Trade-Offs, Biases, and Uncertainty in Project Planning and Execution: A Problem-Based Simulation Exercise

The ability to plan and execute projects is a fundamental skill required among managers and business school graduates. In the opening phase of a project, the project team makes decisions about the relative priority of project time, cost, and performance objectives, oftentimes without complete information about customer and stakeholder requirements. Existing project management curriculum assists in developing skills to decide among these priorities in the abstract through paradigms such as the time–cost–performance triangle, with limited attention to the improvement of skills required to develop solutions to these trade-offs, particularly in uncertain and ambiguous project environments. Further, there is often an underlying bias in project teams toward consideration of the project task and project deliverables and reduced attention to time and cost objectives. This study demonstrates the benefits of a balanced approach to setting project time, cost, and performance objectives using a goal-based simulation exercise entitled "The Bridge to Project Leadership." Results for 124 project teams illustrate the tendency to ignore this balanced approach, resulting in reduced project performance, even among experienced project managers.     

对《会计模拟实训》课程的再认识

《会计模拟实训》是会计学科的主干课程之一。充分认识该课程在理论与实践之间的桥梁纽带作用,对于高职高专会计专业学生的“应用型”、“适应型”能力的培养有着举足轻重的意义。本文力图通过解决会计实训教学中的问题和矛盾,探求实现教学目标的有效方式。