机电一体化技术专业课程建设与改革

本文讨论了机电一体化技术专业课程体系模型的构建,在此模型下的专业课程体系结构,以及该课程体系下的专业核心课程《液压与气动系统的应用与维修》的建设。     

基于智能化的传感器教学实验的仿真系统

基于智能化的传感器教学实验仿真系统是为辅助传感器测量与虚拟仪器实践教学平台的使用而设计的仿真测量软件系统，它由Access软件和LabVIEW软件编写，基于智能化的传感器教学实验仿真系统为实现实验环节的网络化教学做出探索性工作。对实验环节现代化具有重要的实用价值。     

SnO2-CO2O3-Nb2O5-Y2O3陶瓷的微结构和不同温度下的电学特性

用常规的陶瓷工艺制备SnO2-Co2O3-Nb2O5-Y2O3陶瓷. 采用XRD、SEM来对陶瓷的微结构进行表征,详细研究了温度对陶瓷电学行为的影响. 结果表明:烧结的陶瓷结构致密,在陶瓷样品中,除了SnO2相之外,没有发现其他相,在晶粒与晶粒之间没有观察到明显的晶粒层. 在直流电条件下,陶瓷具有明显的稳定的变阻器行为,随着温度的升高这种行为减弱,电导率增大,表现出半导体行为. 这些事实可以归因于陶瓷中的固熔体和晶格中各种缺陷的形成.     

On analysis of electrical engineering programme in GCC countries

Electrical engineering (EE) curricula in the Gulf Cooperation Council (GCC) region have gone through an evolutionary process, and are now approaching a maturity level. In order to address academic and local industrial needs in a unified way, a need has been felt to investigate EE curricula in a way that highlights theoretical understanding, design experience and skills development. This paper focuses on a comparative study of electrical EE programmes offered in various GCC region universities. The general and some focused programmes are analysed with respect to their breadth and depth. Using cluster analysis, we identify five major distinct EE programme clusters, each grouping a set of universities. This outlines where EE programmes in the GCC region are headed.     

高职院校机电类改革探索研究

高职院校机电类专业主要是要求学生掌握本专业领域实际工作的基本能力和基本技能,具备基础理论和专门知识;适应具备机电一体化设备领域实际生产、管理、服务第一线需要的,从事机电设备的操作、安装、维护管理的高素质技能型专门人才。但是传统的机电类课程在教学过程中重理论轻实践,另外课程知识老化、落后,高职院校重在培养技能型人才,因而本文研究从课程重组出发,加强学生技能的培养,研究机电类主要课程中教学方法和教学内容的改革。     

The influence of electrostimulation on mechanical and morphological characteristics of the triceps surae

The present study assessed the effects of training using electrostimulation of muscle (EMS) on the torque‐angular velocity and torque‐angle relationships, and the cross‐sectional area (CSA) of the triceps surae. Twelve physical education students, divided into two groups (6 control, 6 experimental), participated in the experiment. The EMS sessions were undertaken using a ‘Compex‐type’ stimulator. Flexible elastomer electrodes were used. The current used discharged pulses lasting for 200 μs at a frequency of 70 Hz. The durations of contraction and rest were 5 and 15 s, respectively. The session lasted for 10 min for each muscle. The training regimen was three sessions per week for 4 weeks. Biomechanical tests were performed with the Biodex (Biodex Corporation, Shirley, NY, USA) isokinetic ergometer. Plantar flexions of the ankle over a concentric range of voluntary contractions were performed at different angular velocities (1.05, 2.10, 3.14, 4.20, 5.23 and 6.28 rad s^‐1) and maximum voluntary isometric contractions were held for 5 s at several ankle flexion angles (–30°, –15°, 0° and 15°; 0° corresponds to foot flexion of 90° relative to the leg axis). The peak value of the torque was recorded. Morphological tests consisted of measuring the CSA of the triceps surae on the right leg, 15 cm below the tibial protuberance, by a computerized tomography technique. The torque‐velocity relationship was seen to shift significantly upwards after EMS training. The increase in the isometric torque observed after EMS training was greater in dorsiflexion than in plantarflexion. No change was noted in the CSA of the muscle. It appears that the increase in strength following EMS training is not related to an increase in the contractile matter. These observations show that EMS training for 4 weeks develops dynamic and static contractile properties of the muscle. Neural mechanisms may account for these adaptations.     

交互模式下虚拟仿真教学的探索和研究——以“电器可靠性技术”课程为例

教学手段的发展和教学方法体系的丰富,是培养新时代高科技人才的必要途径。将虚拟仿真教学结合交互式教学模式,经过在“电器可靠性技术”课程中的实践,证明其具有很强的优越性。分析了交互式模式下虚拟仿真教学的构成要素,重点探索了其交互设置的合理性、教师引导的高效性、评价体系的全面性等理论基础,研究了其在课程实践中的核心优势和特征。交互式虚拟仿真教学模式的实现是电器可靠性学科实验教学的极大拓展,对“电器可靠性技术”课程教学质量的提高具有深远意义。     

基于51单片机的USB接口应用设计

基于MCS-51单片机系统,以CH372芯片为核心,设计出了USB接口单元电路和驱动程序。并以PC机为宿主机,通过USB接口,利用动态链接库技术完成了PC机与单片机系统间的传输测试。研究表明:在低于1Mbps速率下,能成功实现微机和单片机之间的数据交换,对于较高速率的传输方式,应采用更高效的驱动芯片或通信类专用单片机系统完成并实现微机和单片机之间的数据交换。