绿色汽车的开发前景

绿色作为无污染、无公害和环境保护的标志，绿色汽车是汽车技术不断发展的必然产物，研究和开发新型的交通工具－绿色汽车是环境保护 迫切要求，是汽车工业可持续发展的需要，作者主要论述了开发与研究绿色汽车的重要性、绿色汽车技术在国际国内的发展现状及开发前景，并从绿色技术的理论体系出发来阐明绿色汽车与环境保护和能源的辨证关系，阐述了绿色汽车研究的主要内容，包括绿色汽车的设计及设计体系，绿色汽车的制造及工艺，绿色汽车的能源和绿色汽车的再制造工程等一列系问题，以及如何评价绿色汽车的生命周期及评价指标，指出绿色汽车的发展前景和开发绿色汽车的深远意义。     

汽车涂装防腐技术在现代汽车中的应用

汽车防腐蚀技术从汽车诞生就开始伴随汽车技术的发展，我国直到上个世纪80年代该项技术在国内也未得到足够的重视。随着汽车保有量的提高，汽车技术越发激烈，客户对车身的外观要求也越来越高。所以，各个汽车制造企业对车身的防锈、涂料的褪色、调色、光泽度等非常重视，并给予特别的关注。新的防腐蚀技术，不仅可提高汽车的外观质量，更重要的是可提高汽车的内在质量，延长汽车的使用寿命，提高汽车档次，甚至可成为带动汽车销售的一个增长点。     

汽车维修行业现状浅探

进入新世纪，我国汽车工业快速发展，随着汽车进关税的降低和国民收入的持续增加，人们对车栽工具的需求量呈指数增长，私家车的拥有量水涨船高，汽车维修业已初具规模。但由于汽车技术日新月异，汽车市场。多源化发展，消费者更加理性化，汽车维修业的门槛越来越高，而目前我省汽车维修市场供需发展失衡、行业体制不规范、维修技术水平参差不齐等现状，已经严重制约了我省汽车维修业的快速发展，不能适应市场经济节奏。本文根据汽车维修业相关数据，分析我省汽车维修业当下存在的问题。并明确指出我省汽车维修业发展的方向和制定出与之相应的对策，从而对汽车维修业的持续性、优质性发展做出基本的贡献。     

自动控制系统的汽车电子技术探讨

随着社会经济发展和人民收入水平的提高，汽车目前已经成为居民交通出行主要方式。在汽车生产过程中，自动控制系统应用广泛，涵盖了发动机电子控制系统、变速器自动控制系统、底盘综合控制系统、车身电子安全系统等，提高了汽车驾驶的安全性，降低了汽车油耗与尾气排放，并对于汽车维修与保养有积极意义。随着汽车电子技术进一步发展，自动控制系统在汽车应用范围更广，对于提高汽车综合性能有积极作用。     

论设备保养制度在车辆维修中的运用

现代汽车维修技术的科技含量已越来越高，从电子产品在汽车上的应用，到现代汽车诊断设备的使用、互联网在汽车维修资讯上的应用，以及维修管理软件汽车散热器在汽车维修企业发挥的作用等，处处体现了现代汽车维修的高科技特征。汽车维修已不再是简单的零件修复，准确无误地诊断出故障所在，而是现代汽车维修的最高境界。在加入世贸组织的新形势下，重视汽修企业自身素质的提高、改变汽修经营的原有方式，才能使我国汽车维修业获得较快发展。     

最新汽车维修技术的特征与进展

现代汽车维修技术的科技含量已越来越高，从电子产品在汽车上的应用，到现代汽车诊断设备的使用、互联网在汽车维修资讯上的应用，以及维修管理软件在汽车维修企业发挥的作用等，处处体现现代汽车维修的高科技特征。汽车维修已不再是简单的零件修复，准确无误地诊断出故障所在，是现代汽车维修的最高境界。在加入世贸组织的新形势下，重视汽修企业自身素质的提高、改变汽修经营的原有方式，才能使我国汽车维修业获得较快发展。     

浅析现代汽车维修技术的发展

汽车是国民经济的重要产业，也是一个国家科技水平的写照。汽车维修业随着汽车工业的发展而发展，高质量、高效率的汽车维修不仅能提高汽车运行的可靠性，而且能降低汽车的使用成本，是保障汽车工业健康发展的重要因素之一。本文主要阐述了汽车维修技术发展中的故障诊断及维修技术、检修工具、维修人才、信息资源、维修企业管理技术等方面内容。     

汽车视野安全的研究与进展

汽车视野是汽车主动安全的主要内容之一，对汽车的行车安全具有非常重要的作用。本文首先介绍了汽车工业发达国家以及我国在汽车视野方面的最新研究动态与技术现状。作为重点，从多种不同的角度详细地总结了改进汽车视野安全性能的主要对策和措施，同时考虑了在改进汽车视野时应该注意与其它汽车安全项目相互协调。然后，对汽车视野方面今后的发展趋势进行了展望。最后，笔者比较了美、日、欧三大汽车安全法规在视野方面的不同，并指出我国汽车安全法规的特点和不足。     

自主汽车企业质量管理的探讨

汽车产业对我省工业来说具有举足轻重的地位。奇瑞、江淮、安凯、星马等一批影响中国汽车产业的自主汽车企业，代表着安徽的骄傲，随着外资、合资汽车企业产品价格的下探，自主汽车企业的生存空间越来越小，自主汽车企业要想在与强大的外资、合资汽车企业的竞争中冲出突围，必然要向市场提供高品质的产品，因此，质量管理对于自主汽车企业来说举足轻重．     

汽车文化进高校管窥

汽车文化具有深厚的内涵，包括技术文化、车史文化、造型文化、名人文化、名车文化、车标文化、赛车文化等内容．以高等学校为突破口，让汽车文化进高校，从而带动社会各群体了解汽车文化知识．通过汽车文化的熏陶，有利于国民正确地、全面地认识汽车与汽车产业政策，对培养遵纪守法、节能环保、安全文明的驾驶人有着重要的意义．提出了在高等学校普及汽车文化的目标。阐述了汽车文化在高校中普及的主要内容与方式．     

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.     

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.     

A computer generator for randomly layered structures

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

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to