新能源汽车解困之路

新能源汽车是随着各国以至于全球能源逐渐短缺而成为各汽车制造商研究的重点。汽车是在国外被普及之先,因此,国外的汽车厂商最早开始研究新能源汽车。然而,至今还没有一家国外汽车制造商公开宣称自己已经掌握了新能源汽车生产的技术并批量生产。因为,是否为新能源汽车,关键并不在于汽车,而是使用何种新能源。在我国,随着工业化速度的加快,能源短缺问题也被提上日程。随着各项法律、政策的出台,政府的引导,我国新能源汽车的研究也在不断提速。然而,"车与人争口粮"、技术不成热,新能源不能持续等问题也不断地困扰着新能源汽车的研发和生产。国家发展改革委出台的《可再生能源中长期发展规划》,为我国新能源汽车铺上了快速路,希望在此《发展规划》指引下,我国的新能源汽车能够"名副其实"。     

从安全问题看新能源汽车如何前行

“丰田车召回门”、“比亚迪电动汽车电池安全事故”等事件为当前红火推进的新能源汽车事业敲响了警钟。由安全问题引发的新能源汽车技术、标准等问题在探索我国新能源汽车产业发展中都是不能忽视的。     

汽车发展脱困之路——试论新能源汽车的发展

传统汽车的发展和普及势必加剧能源的短缺和环境恶化,新能源汽车则恰恰借力新能源技术的东风巧妙地解决了汽车发展中的能源和环境问题,因此新能源汽车也就自然成为未来汽车发展的新方向.本文围绕新能源汽车的研发原因、发展态势和未来方向等问题进行探讨从而展示了新能源汽车发展概况.     

我国新能源汽车技术创新态势研究 ——基于国内1988—2018年专利数据的分析

基于国内1988—2018年专利数据,从我国新能源汽车专利申请数量、专利申请趋势、专利技术特征、专利申请地域分布、专利申请主体等多个维度分析了我国在新能源汽车产业领域的技术创新研发态势.研究结果表明:我国新能源汽车技术专利数量申请速度逐年加快;技术研发方向主要集中在电动汽车领域;技术重点集中分布在电池、电控、电机和智能终端等动力装置领域;专利主要申请主体以高校科研机构为主;专利申请呈现出区域发展不均衡特征.通过S曲线法来分析新能源汽车技术生命周期发现我国新能源汽车技术正处于技术生命周期的快速发展阶段,产业生态结构逐渐完善,技术发展格局初步奠定,未来发展潜力巨大.政府应积极推动建立技术创新市场机制,鼓励和引导企业加大研发投入,同时给予技术创新财政补贴,建立区域技术资源共享平台,引导相关行业实现创新、共享发展.     

新能源汽车产业及其技术发展现状与展望

发展新能源汽车、推进新能源汽车产业化，对解决传统燃油汽车高污染、高耗能、高排放问题具有重要意义。以新能源汽车为研究对象，从新能源汽车发展背景、整车和三电系统综合分析了中国新能源汽车目前的产业与技术发展现状；提出了中国新能源汽车目前存在基础设施建设尚不完善、电池回收利用率低、基础器件关键技术未掌握等问题，探讨了新能源汽车技术与产业未来的发展方向和规划。     

新能源汽车在我国的发展研究

我国的能源危机和环境问题十分严峻,发展新能源汽车是解决能源与环境问题的必然选择,本文通过分析我国新能源汽车的相关政策、市场表现,探讨了新能源汽车发展中的问题,并提出了若干建议。     

我国新能源汽车政策现状及发展趋势分析

以我国新能源汽车在研发支持、汽车管理、示范运行、消费使用4方面的政策现状入手,分析了我国新能源汽车政策现状及存在的问题,并提出了我国新能源汽车政策发展趋势,以不断完善相关法规政策。     

基于因子分析的新能源汽车消费影响因素研究

目前我国新能源汽车的市场销量增长缓慢,消费者购买新能源汽车积极性不高.针对这一现象,开展了新能源汽车消费行为影响因素的问卷调查,应用SPSS统计软件对调查结果进行因子分析,结果发现影响新能源汽车消费行为的主要因素有优惠政策、相关费用、配套设施、安全舒适、车辆功能、宣传口碑以及便捷服务等7项因子.最后,根据分析结果对新能源汽车企业发展给出了建议.     

关于我国新能源汽车的发展分析

在全球能源短缺,提倡清洁能源的大背号下,新能源汽车是汽车行业发展的必然选择。本文从新能源汽车兴起的背景出发,提出我国新能源汽车发展的挑战和促进我国新能源汽车发展的相关措施,对我国新能源汽车的发展有重要意义。     

抓住机遇,大力发展天然气汽车——论天然气汽车的优势、问题及对策

天然气汽车的使用是未来新能源汽车中较为成熟的技术,与其他新能源相比有着明显的优势,文章就能源问题和环保问题日益突出的前提下,针对性地讨论了我国大力发展天然气汽车的可能性,并提出了一些解决问题的方案。     

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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