液压实训教学改革的几点尝试

充分利用液压实训台,将实训分解成液压基本回路实验和典型元件的拆装两部分。通过各个教学环节和各种方式,使学生将理论知识融入到实践当中,掌握控制回路的工作原理。能分析和排除液压传动系统的常见故障。同时还可以培养提高学生的动手能力。以职业能力为本位开展实训教学,不仅能提高学生的专业综合能力,而且还能为学生拓宽就业之路。     

基于FESTO液压气动实训平台的任务驱动式实践教学

针对高职院校机械大类"液压与气动技术"课程特点和教育部关于切实提高学生实践动手技能要求,提出基于FESTO液压气动实训设备和Fluid SIM软件的任务驱动教学模式。应用此种模式进行理实一体化教学,可以锻炼学生动手实践技能并培养其设计、分析工程回路的能力,塑造其团结协作素质,养成踏实严谨工作作风。     

浅谈《液压与气压传动》课程实践教学改革

侧重学生技能培养是职业院校教育教学改革的主要方向,通过高职《液压与气压传动》课程的实践教学改革,围绕液压传动的实验实训内容、教学方式等提出了课程实践教学环节改革的策略与思路,激发了学生的学习兴趣和主动性,提升了教学效果。     

基于机器人和视觉系统的残次品分拣实验台设计

针对职业院校学生综合实训机会较少,缺乏与专业知识紧密结合等问题,设计了一种基于机器人和视觉系统的残次品分拣教学实验台。将工业机器人技术、机电一体技术等相关专业中的机器人技术、视觉技术、触摸屏技术、PLC技术、传感器技术、液压与气压传动技术等结合在一起,形成了一套可供机电一体化专业综合实训教学平台,保证了实训教学的综合性与创新性,也提高了学生的综合实践能力。     

成人教育《液压气动技术》课程教学改革研究

本文分析了《液压气动技术》课程在理论教学和实践教学方面存在的问题,并根据电大成人教育学生的特点,就本课程的教学内容、教学方法和实践性教学等方面提出了较为系统的改革方案。提出了在课程内容上要优化配置;教学方式上运用多媒体技术、学生讲演和分组讨论等方式;实践教学上结合实训、课程设计和实习等三种途径。通过这些改革,提高了学生学习的主动性、积极性和针对性,增强了学生的动手能力和自主创新能力。     

基于汽车配件市场营销平台制作实训台研究

本文主要介绍以帕萨特车型为模型，制作汽车全车电器平面实训台。提出了一种新的教学模式，汽车技术服务与营销专业的学生以汽车配件市场营销为平台制作实训台。通过完成汽车配件进、存、销、制作实训台等全过程，以达到培养学生驾驭汽车配件市场的能力。     

利用仿真软件提高液压教学质量

《液压与气压传动》是中职机电技术应用专业的核心课程,本文采用FluidSIM仿真软件里元件插图功能使液压元件原理讲解更生动,使用软件的仿真功能拓展了实训的范围,取得了较好的教学效果,提高教学质量.     

新形势下液压虚拟实验室在教学中的应用

为了适应新形势下流体传动与控制技术行业发展的需求,提高液压专业人才培养的质量,作为工科院校实验教学显得尤为重要,而实验教学的手段和方法一定程度上影响着教学的质量与学生的基础实践能力与解决复杂工程问题的能力。为了培养学生在液压元件与系统方面有更高的理论水平和更强的工程实践能力,教学过程中将液压虚拟实验室与传统实验室相结合使用是有必要的而且是至关重要的。     

《液压传动与控制》教学实践与探讨

《液压传动与控制》是机械设计制造及其自动化专业学生必修的一门实践性较强的专业基础课,要求学生将机械工程领域理论与实践相结合,从而提高学生创新精神和工程实践能力。该文针对该课程的特点,对《液压传动与控制》教学进行了探讨,提出调整教学内容、改善教学方法、重视实践教学,对培养学生专业知识的综合应用能力、动手能力和创新能力以及提高教学质量具有一定的促进作用。     

ZD6型转辙机道岔控制综合实训台的设计——以长春职业技术学院机电学院为例

为了扩展原有道岔控制实训台功能，实现学生对道岔控制电路的自主设计与训练，以长春职业技术学院机电学院为例，对现有道岔转辙设备进行深入研究，采取增加故障按钮盘、挤岔表示灯(JCD)及终端电缆盒等装置的方式，成功研制出一套低成本、高安全的ZD6型转辙机道岔控制综合实训台.该实训台能够实现自主设计、自主焊接配线和自主排除故障功能，还可以与原有道岔控制实训台进行切换控制使用，有效提升了学生动手实践能力，以及高职院校教师的科技创新能力.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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