高速公路中间带波形梁护栏高度

针对中国高速公路中间带护栏高度不足的问题,对高速公路中间带波形梁护栏的高度进行研究。采用能量守恒方法,在构建波形梁护栏和车辆计算模型的基础上,建立高速公路中间带护栏高度计算模型;并采用调查分析的方法,对交通事故、交通组成以及相关车型的设计参数进行分析,确定了护栏高度计算模型中的有关参数。研究结果表明,适合中国高速公路中间带波形梁护栏的高度宜为87．6cm,可有效地防止大型车跃出和小型车钻撞护栏等恶性交通事故的发生。     

一级公路改建高速公路中分带再利用护栏研究

某一级公路改建为高速公路,为缩短施工周期、降低工程造价,同时兼顾路面加铺工况,经过充分研究,在可再次使用原中央分隔带两波形梁护栏和路侧护栏结构的基础上,提出一种中分带再利用护栏。该结构采用计算机仿真方法进行安全性评估,并已通过实车足尺碰撞试验。试验结果表明,中分带再利用护栏防护等级达到三（Am）级,阻挡功能、缓冲功能、导向功能均满足要求,护栏安全性能可靠。该再利用护栏已在实际工程中应用,不仅提高了中央分隔带护栏的安全防护能力,而且取得良好的经济效益。     

基于GMM和枪声的军事环境判别

枪声在军事环境下是一个令人高度重视的声音信号。针对其所含信息量的重要性,提出了一种基于枪声检测的军事环境判断方法。首先利用基于中值滤波的算法检测出枪声的起止点;采取反应人耳听觉机理的声音信号动态特征-Mel倒谱系数描述声音信号;然后利用基于高斯混合模型的枪声检测及识别系统完成对枪声的分析从而实现对当前军事环境的判断。实验结果证明了该方法的准确性和有效性。     

基于图像处理的高精度检测方法研究

由于蓄电池密度人工检测误差大,提出了基于图像处理技术来提高溶液密度检测的精度。运用几种常用的边缘检测方法对密度的检测图像进行了识别和提取。该方法实验数据准确、误差非常小,具有一定的发展前景。     

基于VB．NET混合滤波器的实现

以中值滤波为基础,结合VB．NET的图像处理技术,从编程角度提出了低通滤波预处理及纵向和横向滤波的强化滤波实现方法．实验证明,该方法对图像强噪声实现了有效的过滤．     

高等级公路的封闭防水型中央分隔带技术

针对目前高等级公路中央分隔带防(排)水设计方案施工中存在的问题,从对中央分隔带统筹考虑优化设计出发,提出了一种实用新型封闭防水的技术方案,经对比分析,该技术实用可行,经济合理。     

小波域中值滤波的图像去噪方法

提出了小波域中值滤波的去噪方法,在去除高斯白噪声的同时能有效地去除脉冲噪声.此方法是在小波域内对高频子带进行中值滤波,然后选择相应的门限进行降噪处理.仿真实验表明该算法不仅能滤除图像中的脉冲噪声和高斯噪声,而且能较好的保留图像的边缘细节,其滤波效果优于小波软阀值去噪.     

Solving the Median Shortest Path Problem in the Planning and Design of Urban Transportation Networks Using a Vector Labeling Algorithm

This paper proposes an alternative algorithm to solve the median shortest path problem (MSPP) in the planning and design of urban transportation networks. The proposed vector labeling algorithm is based on the labeling of each node in terms of a multiple and conflicting vector of objectives which deletes cyclic, infeasible and extreme-dominated paths in the criteria space imposing cyclic break (CB), path cost constraint (PCC) and access cost parameter (ACP) respectively. The output of the algorithm is a set of Pareto optimal paths (POP) with an objective vector from predetermined origin to destination nodes. Thus, this paper formulates an algorithm to identify a non-inferior solution set of POP based on a non-dominated set of objective vectors that leaves the ultimate decision to decision-makers. A numerical experiment is conducted using an artificial transportation network in order to validate and compare results. Sensitivity analysis has shown that the proposed algorithm is more efficient and advantageous over existing solutions in terms of computing execution time and memory space used.     

A vehicle manufacturer's view of the potential for electric automobiles

In the search for low pollution, low noise, multi‐fuel vehicles capable of adapting to almost any source of energy available, the electric vehicle continues to be suggested in a variety of forms. In the long‐term view, working on the hypothesis that either solar or nuclear energy can provide the only inexhaustible energy supplies, electric propulsion will undoubtedly have a significant role to perform, and it could provide a useful means of transport in the transition period out of the current dependency on crude oil.

There are, however, some grave question marks hanging over the viability of electric vehicles on a large scale both in terms of their energy efficiency and practicality. This paper describes the state of development and discusses the future prospects.     

基于空间各向图像预处理及三维重构效率分析

主要研究将二维图像预处理和二维种子填充方法向三维推广,并对三维图像预处理和三维种子填充的方法进行了重构效率的分析比较,探讨了三维种子填充中扫描方向、堆栈建立的合理性选择,由此得出最佳三维种子填充的程序实现方法,为细小组织的三维重构和器官切割仿真手术提供技术支撑。