方槽式振动抛光机有限元模型的建立

方槽式振动抛光机建立模型分两部分,第一部分是建立几何模型。建立几个模型相似一些建模分方法,但又和其他的方法存在着不同。在建立槽式槽体时是首先建立一些基本元素,然后在此基础上生成高级元素。第二部分是建立有限元模型。建立有限元模型首先要选定单元类型,其次是要设置单元属性,并定义材料属性。     

大学生创新能力培养机制的构建与实施

大学生创新能力的培养是高校教育教学改革的核心,是大学生全面发展的需要。分析当前大学生创新能力存在的问题和产生的原因,提出建立创新教育理念指导下的培养机制、建立新的课程制度下的目标机制、建立科学的实践教学机制、建立教师的引导机制、建立科研导向的教学机制、建立师生的激励机制和建立课堂联动机制等策略。     

中小学校本教研制度的建立及工作细则

以新课程为导向,深化教育改革,发展教育事业,改进和加强教研工作,立足学校,解决学校在课程实施中所面对的各种具体问题,建立以教师为研究主体,以学生主动发展和教师专业化成长为宗旨的校本教研制度,是保证新课程实验向纵深发展的新的推进策略。因此,建立以下校本教研制度及工作细则:1、建立校本教研的组织制度;2、建立校本教研工作制度;3、建立校本教研对话交流制度;4、建立课题研究制度;5、建立校本教研指导制度;6、建立校本教研激励评价制度。     

论拖拉机液压悬挂系统动态性能的评价指标体系

本文比较系统地论述了建立液压悬挂系统动态性能评价指标体系的理由,分析了建立评价指标的理论依据,并建立了评价指标的具体计算表达式,最后论述了建立评价指标体系的实际意义。     

建立农地流转市场机制的思考

我国要建立社会主义市场经济体制,实现市场对于资源的优化配置,就要建立农地流转的市场机制.本文分析了在我国建立农地流转市场机制的必要性,并提出了有助于市场机制建立的几点建议.     

导集运算与拓扑空间

利用非空集合中满足一定条件的子集族建立拓扑空间的方法有很多,如应用开集公理建立拓扑空间、应用邻域系公理建立拓扑空间、应用边界运算建立拓扑空间.笔者定义了导集运算,并应用这个定义建立了拓扑空间.     

浅淡独立坐标系的建立

结合工程测量实际,介绍了建立地方独立坐标系的因素,通过地方坐标系的建立,阐述了利用GPS技术建立独立坐标系的椭球变换方法.根据工程测量中长度投影变形的影响等因素和大型工程测量的要求,应建立地方独立坐标系.介绍了独立坐标系建立的一般方法.     

浅谈独立坐标系的建立

结合工程测量实际,介绍了建立地方独立坐标系的因素,通过地方坐标系的建立,阐述了利用GPS技术建立独立坐标系的椭球变换方法。根据工程测量中长度投影变形的影响等因素和大型工程测量的要求。应建立地方独立坐标系。介绍了独立坐标系建立的一般方法。     

信息化物流系统引发的运输革命

以分析建立信息化物流系统必要性为基础,在经济模型的建立和技术手段的运用两方面,论述信息化物流系统建立的可行性与发展前景,提出了可操作的思维方法,并阐明了本系统的建立对经济发展与管理的重大作用.     

一种软硬件实施无缝连接的车辆控制器集成开发系统研究

为适应车辆控制器快速开发的要求,采用Matlab／Simulink开发环境建立车辆模型,用Stateflow建立了车辆控制系统模型．采用实时工作间建立可用于单片机C语言代码,建立了目标CPU自动代码生成系统,利用集成的实时硬件开发系统建立一种高效无缝的开发系统．并用车辆防抱死制动系统验证这一系统的实用性．     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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