发展汽车自主EMS系统对节能减排的重大意义

汽车节能减排的核心在于发动机技术的提升和混合动力技术的应用,这两个技术都需要依靠发动机管理系统(Engine Management System,简称EMS)。发展汽车自主EMS系统对于节能减排具有重大意义。奇瑞率先突破国内EMS技术空白,自主研发的EMS系统已经产业化,月销量超过3万套,并在奇瑞节能减排的技术创新上提供控制系统保障。     

CAN数据总线系统在汽车节能减排中的应用研究

对CAN数据总线系统应用于某品牌商用汽车发动机电控和数据传输的节能减排特性进行了试验研究,结果表明,装配CAN数据总线的车辆比未装配CAN数据总线的传统车辆车身总体减重300 kg,实现发动机实时工况控制节油7%,尾气减排5%,车身减重节油10%以上,多工况循环标准状态下燃料消耗量为7.26 L/100 km.综合节能效果显著.该研究为汽车节能技术发展提供一定的参考.     

泡沫铝层合结构汽车发动机罩板研究

为了提高汽车的节能性、安全性,文章以某汽车发动机罩板为设计原型,以轻量化和刚度满足要求为约束条件,设计了泡沫铝层合结构汽车发动机罩板;利用有限元仿真分析方法对2种结构汽车发动机罩板的静态性能及其与行人头部碰撞保护性进行了分析。结果表明,泡沫铝层合结构汽车发动机罩板不仅可以实现汽车轻量化,达到节能减排的目的,而且还可提高汽车发动机罩板的静态性能及与行人碰撞的安全性。     

关键词

节能轮胎4月11日在京召开的"面对危机,合作共赢——2012汽车和轮胎产业高峰论坛暨全球商务峰会"上,与会专家呼吁,轮胎作为汽车节能减排技术创新的重要载体,必须走节能减排、低碳发展之路。在汽车行驶过程中,轮胎的能耗占整车能耗达到20%以上,仅次于发动机。     

小议汽车发动机气缸体的维修技术

汽车发动机气缸体的气缸在磨损后,在修理过程中需要更换整个气缸体,从而造成维修成本过高。结合工作实践经验,论述了汽车发动机气缸体的维修技术目的在于有效延长发动机缸体的使用寿命,有效的降低了维修成本。     

浅谈汽车发动机的轻量化

轻量化是汽车节能减排的重要措施之一。本文论述了发动机轻量化的意义,以及发动机轻量化在新技术上的突破,在新材料上的应用,在新制造工艺上的实施。     

汽车节能减排可实行方法分析

本文从汽车节能减排的重要性角度出发，通过汽车节能减排的可实行方法的几个方面进行分析，以及我国现在实行汽车节能减排的方法，进而总结出一些切实可行的方法。     

汽车发动机轻量化材料的应用和展望

汽车轻量化不仅是汽车工业发展的方向,同时,也是汽车节能减排的重要措施之一。作为汽车"心脏"的发动机,其轻量化不仅能够降低发动机制造成本,而且也是降低汽车使用能耗的重要手段。该文主要从发动机材料方面分别阐述了铝及铝合金、镁及镁合金、钛及钛合金等轻质金属合金材料和塑料、陶瓷等轻量化材料的特性,轻量化材料在提升汽车发动机性能方面的作用以及在目前汽车发动机中的应用现状,并结合材料科学发展趋势,进一步提出汽车发动机轻量化材料的发展方向。     

对我国汽车节能减排的思考

在我们的日常生活中,我们越来越依赖私家车,但是汽车给我们带来的危害也是相当严重的,因此,汽车的节能减排必须放在政府的日程上来,只有对节能减排工作做出了合理的宏观调控,整个节能减排工作才能顺利进行。本文介绍了节能减排的概念及重要性,并且对汽车节能减排的相关措施给出了分析,希望能对我国汽车的节能减排有所帮助。     

基于Internet的汽车发动机CAE系统的开发和应用

通过汽车发动机CAE系统的研制和开发,在Internet环境中实现了发动机缸体的结构有限元分析、静/动态强度及变形的定量分析评价,并对发动机缸体进行了辐射噪声预估计算.对发动机的设计改进有着重要意义.该系统的开发和应用,使产品的分析和设计手段得到了极大改善,能提高工程技术人员的CAE分析能力。     

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.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-