THE QUANTITATIVE MEASUREMENT OF BCL-2, P53 PROTEIN AND PCNA EXPRESSION IN BREAST CARCINOMA AND THEIR CORRELATION WITH PROGNOSIS

Recently,alargenumberofresearchesindicatedthatoccurenceanddevelopmentofbreastcarcinomaswerecorrelatedwithhighexpressionofblockingapoptosisoncogene,mutationofantioncogeneandexpressionofcontrollingcellproliferativeoncogene.Therewerefewreportsondocumentsofquantitativestudyofexpressionaboutblockingapoptosisoncogene--hcf--2(Bcellleukaemia/lymphomagene),productofP53proteinandproliferatingcellnuclearantigen(PCNA)inbreastcarcinoma.Ourpurposewastoinvestigatequantitativeindexinrelationtoclinicalpathol…     

基于故障树的船用核动力装置维修性建模研究

结合船用核动力装置的特点,阐述了建立基于故障树维修性模型的方法和流程.以建立故障树为基础,建立了关于船用堆余热排出系统基于故障树的维修性模型,对其进行定量分析得到系统修复性维修时间.该方法直接利用可靠性分析中的故障树建立模型,节省了建模强度,计算结果由可靠性数据支持,克服了以往定量分析中维修性数据不足的缺点.     

Virtual test rig to improve the design and optimisation process of the vehicle steering and suspension systems

A virtual test rig is presented using a three-dimensional model of the elasto-kinematic behaviour of a vehicle. A general approach is put forward to determine the three-dimensional position of the body and the main parameters which influence the handling of the vehicle. For the design process, the variable input data are the longitudinal and lateral acceleration and the curve radius, which are defined by the user as a design goal. For the optimisation process, once the vehicle has been built, the variable input data are the travel of the four struts and the steering wheel angle, which is obtained through monitoring the vehicle. The virtual test rig has been applied to a standard vehicle and the validity of the results has been proven.     

关于纯电动面包物流车漏雨问题的分析与研究

文章针对纯电动面包物流车淋雨密封存在的一些漏雨问题,阐述了现状及典型淋雨漏水点,并分析了其漏水原因及进行了优化改善,进一步提高了其一次性淋雨通过率,明显提升了纯电动面包物流车的淋雨密封品质。     

关于长沙市轨道交通线网规划车辆选型的研究

介绍长沙市轨道交通线网规划车辆选型的研究过程,主要以现行规范、标准为依据,以客流预测为基地,以运能储备率为评价标准。简化了以往车辆选型过多纠结车辆内部技术参数的问题,方法简单清晰。     

A passenger car driver model for higher lateral accelerations

Due to increasing demands for time and cost efficient vehicle and driver assistant systems development, numerical simulation of closed-loop manoeuvres becomes increasingly important. Thus, the driver has to be considered in the modelling. On the basis of a two-layer approach to model a driver's steering behaviour, the field of application is extended to higher lateral accelerations in this study. An analytical method to determine the driver parameters is presented, which is based on the two-wheel vehicle model. The simulation results are determined using a full vehicle model including all essential nonlinearities. Standard manoeuvres in the nonlinear range of vehicle handling behaviour are performed. A cornering manoeuvre is chosen to show the characteristics of the proposed driver model.     

斯太尔汽车双前轴转向机构分析及其应用

本文在对斯太尔重型汽车的双轴转向传动机构进行分析的基础上建立了数学模型,研究了各部分的传动过程,并采用MATLAB语言编写了转向传动机构分析程序,对转向轴内外轮之间,前后轮间的转角匹配,以及最小转弯半径的匹配关系进行了优化。     

How well a single-track linear model captures the lateral dynamics of long combination vehicles

ABSTRACT

The effect of centre-of-gravity heights on the high-speed performance measures of long combination vehicles including truck with double centre-axle trailers, Nordic, and A-double combination vehicles is investigated. The high fidelity three-dimensional models, used in this research, are validated against physical test data. These models are often accurate in terms of the actual dynamic behaviours of the vehicle. On the other hand, the simple yaw-plane single-track models with linear tires require less number of vehicle parameters. In this paper, it is investigated how accurate the estimations of performance measures are at high forward speeds by such single-track linear (STL) models. The influence of load height is especially studied. The high-speed performance-based standard or PBS measures considered are rearward amplifications of both lateral acceleration and yaw velocity; lateral load transfer; yaw damping and high-speed transient offtracking. The results show that tire relaxation has a large effect and it is rather easy to add to an STL model, so it is assumed to be modelled in STL. With realistically high payload and a required accuracy of PBS measures of approximately 10%, only the accuracy of rearward amplification of yaw velocity calculated by the frequency response is fulfilled by the STL. With low payload, the same statement is valid, but with around 5% in required accuracy. The roll dynamics effects are more important than the tire non-linearities.     

电磁环境船模预测技术的误差分析研究

基于缩比船模原理,从模型限制误差、方法误差和问题本身的误差等方面分析电磁环境船模预测技术的主要误差源,并在此基础上分别论述上述误差源对电磁环境预测精度产生的影响.可以有针对性地采取相应措施控制误差,以更好地获取逼近于实船的电磁环境分布特性.     

基于可拓切换控制方法的智能车辆车道保持系统研究（双语出版）

针对道路曲率变化范围较大时，智能车辆在大曲率道路工况车道保持控制精度低的问题，提出一种基于可拓切换控制理论的智能车辆车道保持控制系统，该车道保持系统由上层可拓控制器和下层控制器两部分组成。在上层可拓控制器中，通过车道线检测得到车辆相对于道路的位置信息和道路曲率信息。根据可拓集合理论，选取预瞄点处横向位置偏差和前方道路曲率值作为可拓集合的特征值并划分可拓集合，求解关联函数，并根据关联函数值将车辆-道路系统状态分为经典域、可拓域和非域。在下层控制器中，在经典域采用基于横向位置偏差和航向偏差的PID反馈控制器，在可拓域中采用基于前方道路曲率的PID前馈-反馈控制器，非域中车辆-道路系统处于完全失控状态，采取紧急制动。2种仿真工况结果表明：相比于单一PID反馈控制，提出的车道保持控制系统，有效抑制了在大曲率道路下的跟踪误差值，提高了智能驾驶汽车在时变曲率的道路工况下车道保持控制精度和工况适应性。