浅谈机动车驾驶员机能失调与交通事故

机动车驾驶员机能失调是导致交通事故的重要原因、主要原因和直接原因。而造成驾驶员机能失调的因素是多方面的,包括主观因素、客观因素、生理因素和其他因素。因此,只有从根本上杜绝驾驶员机能失调的现象,才能有效地避免交通事故的发生。笔者根据自身30多年的驾驶经历和安全行车160万公里的经验,从机动车驾驶员机能失调的类型与主要状态入手进行分析探讨,对如何预防和避免驾驶员机能失调、预防和避免交通事故,提出了自己的看法。     

论驾驶员综合素质与安全驾驶

行车安全与汽车驾驶员的综合素质息息相关.该文从驾驶员的综合素质出发,探讨驾驶员安全驾驶所必需的心理、生理、技能、法律、思想道德和科技等素质,认为只有全面提高汽车驾驶员的综合素质才能实现安全驾驶,从根源上预防和减少道路交通事故的发生,降低交通安全风险.     

新手驾车安全研究

本文分析了国内新手驾车交通事故的原因,针对存在的问题提出新手驾丰安全隐患预防对策:加强驾校培训管理、完善驾驶员考试制度、驾驶模拟器用于驾驶员培训和新手驾驶员的安全教育,旨在提高新手的综合素质和驾驶水平,使新手远离道路交通事故。     

试论驾驶员心理素质对行车安全的影响及对策

驾驶员的心理素质即驾驶员的思想修养和职业道德,贯穿于驾驶员行车的全过程,直接制约着行车的安全。不良的心理素质是导致交通事故的最主要原因之一。因此,优化驾驶员的心理素质,消除不良心理行为,对预防交通事故,保证行车安全具有重要的意义。     

浅谈夜间交通事故多发的原因及对策

近年来夜间交通事故呈上升趋势,夜间安全行车十分重要。夜间交通事故多发的原因：一是驾驶员主观上的原因;二是客观存在的原因。预防夜间交通事故多发的对策是需要驾驶员加强自身教育,提高安全意识,也需要道路交通管理部门强化宣传和加大执法与整冶工作,确保夜间安全行车。     

浅论职业驾驶员的安全教育管理

职业驾驶员承担着载客运货的任务,职业驾驶员的安全教育管理对于减少交通事故、树立文明驾驶典范具有重要作用。本文分析了国内职业驾驶员自身存在的驾驶技术、安全意识以及法制观念等方面的缺陷,提出了适用于车队职业驾驶员安全教育管理的四个体系：驾驶员遴选体系、教育体系、训练体系、监督体系。     

加强聘用驾驶员管理，确保行车安全

加强聘用驾驶员的管理，减少交通事故的发生，提高驾驶员安全行车保障，为社会创造安全和谐的生活环境。     

山区公路小半径曲线事故黑点改善效果评价

通过现场行车实验,利用动态视角、车辆加速度、横向力系数、驾驶员心率变化等评价方法,对黑点路段改善前后的行车安全水平进行评价分析.结果表明,采取的改善措施使驾驶员视觉感知效果明显增强,车辆行驶稳定性显著提高,降低了驾驶员心理生理负荷.改善措施有效抑制了交通事故,验证了横向超高变坡设计预防交通事故的有效性.     

浅谈培养驾驶员良好素质与安全行车的对策

确保道路交通安全是一项系统工程,是全世界普遍重视又严重的社会问题,人、车、路三大要素对道路交通全安有重大影响,但有相当一部分是由于驾驶员缺乏职业道德所引起的。文章分析了驾驶员因素对道路交通安全起决定性影响,以及如何提高驾驶员的素质及安全行车的对策,遏制交通事故的发生。     

汽车安全驾驶与应急处理措施

随着人们生活水平的不断提高,汽车使用的普及率逐步增加,但交通事故的发生数也逐步上升.据不完全统计,每年因为车祸而造成人员伤亡事故的数字惊人,因此,如果汽车驾驶员在行车的过程中不能做到安全驾驶,就很容易造成各种交通事故.该文分析了影响汽车驾驶员驾驶安全的几个主要因素,介绍了汽车在下长坡、在泥泞湿滑路面行驶、在冰雪道路行驶、在半坡起步及平时停车等几个方面应当注意的安全驾驶技术问题,从而为驾驶员能够更安全的驾驶汽车提供有力借鉴,同时也为创造一个安全、环保和健康的环境做出一定的贡献.     

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.     

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.     

英文诗歌中的喻类修辞

为了有助于提高英文爱好者的个人情操、文化素养和学习兴趣,以及专业人员对英语学习和研究进行多途径的探索,本文通过一些精选诗歌的引证和分析,着重论述了喻类修辞法在英文诗歌中的运用其及效果。     

Man Is Unable to Change the Miserable Life——Analysis of the Arrangement of Four Characters in The Glass Menagerie

Tennessee Williams is considered as one of the most important American playwrights since World War II.The Glass Menagerie is his first successful drama,which describes a tragic situation of family and means to say that Man is unable to change the miserable life,no matter whatever means he try,This essay focuses on the analysis of the arrangement of the four main characters:Laura.Amanda,Jim and Tom to reveal the theme.Laura is fragile.Amanda is brave.Jim is vital.Tom is sensible.And all of them develop and try the different means to struggle against life,but fail tragically.With the evidence,the paper comes to conclusion naturally that Man is unable to change the miserable life,and he dooms to fail.     

Characterization of root-nodulating bacteria on Retama raetam in arid Tunisian soils

The aim of this study is to investigate the diversity of Retama raetam root-nodule bacteria isolated from arid regions of Tunisia. Twelve isolates, chosen as representative for different 16S rRNA gene patterns, were characterized by 16S rRNA gene sequencing and phenotypic analysis. Isolates were assigned to Sinorhizobium, Rhizobium and Agrobacterium. Symbiotic properties of Sinorhizobium and Rhizobium isolates showed a large diversity in their capacity to infect their host plant and fix atmospheric nitrogen. Strain RK 22 identified as Rhizobium was the most effective isolate.     

An Affordable Accurate Evaluation of the Binding Conformations Predicted by Molecular Docking Studies in Bio-System

正Recently,docking has been widely used to predict the binding-modes of protein-inhibitors,when the crystal complexes structure was absent.Most docking algorithms are able to generate a large number of probable conformations,it,however,is difficult to effectively evaluate these docking poses and identify the most reasonable bindingmode.In the present study,on the basis of the crystallographic data of human 3-hydroxy-3-methylglutaryl coenzyme     

WIMAX与WI-FI技术分析及联合组网

介绍了WiMAX与Wi-Fi两种无线宽带接入技术,并对两者之间的关系及相互之间的影响做了对比及分析,并对WiMAX的关键技术进行了详细说明,最后对两者的联合组网方式做了简单的探讨。