一种基于Edline线特征的车道线识别算法

为了提升车道线检测的准确性和实时性,改良车道偏离预警系统的性能,提出了一种新的车道线识别算法。首先应用投影法对采集到的图像设立感兴趣区域,以此来减少图像中存在的干扰信息;其次应用一种改进后的自适应高斯滤波算法对采集所得图像进行平滑处理,减少图像中不必要的细节;最后采用边缘绘制算法进行边缘检测,在此基础上,提出一种线段检测算法——Edline算法提取边缘线,对检测到的直线段进行筛选和聚类。利用引用计数法对车道线进行跟踪和预测。结果表明,新算法的平均处理时间为17.1 ms,准确率为96.19%,将其应用在车道偏离预警系统中可以有效地提高预警效率,提升预警的准确性和响应速度。研究结果丰富了车道线识别理论,可为车道偏离预警系统的应用及基础研究提供参考。     

实时财务报告:需求、困境与实现

信息化下的实时财务报告系统作为未来财务会计发展的一个方向必将给传统的财务会计领域带来重大的变革。实现实时财务报告系统,要以完备的信息化保障为前提,同时树立起成本效益理念和重要性理念。     

一种新的卫星通信信号快速盲检测方法

提出了一种卫星通信信号快速盲检测算法,该算法能够适应频谱不重叠的多信号环 境,并能准确估计信号的数量、中心频率及带宽等参数。算法既高效又简单,所需数据量少 且适应低信噪比条件,适于在星载设备上实现。理论分析和仿真及测试结果证明了算法的有 效 性。     

浅论转基因食品的PCR检测技术

荧光定量PCR技术可以应用于转基因食品的检测,相比于以往的定量检测PCR,其灵敏度提高了10倍,同时可以方便、快捷的得到判定结果,提高检测的效率和速度。     

发电厂高压开关检测技术

根据高压开关的维修调查报告,高压开关的高故障率导致很多企业正常生产的过程中由于供电的不连续导致巨大的经济损失,通过对高压开关工作原理和状态检修理论的综合分析研究。     

国内外物流实时配送对比研究

本文主要阐述了国内外物流实时配送的发展现状,并进行了深入细致的比较分析研究,指出我国物流实时配送系统过程中存在的问题,并提出了解决的方法和思路,最后指明了物流实时配送的发展趋势。     

浅谈GPS实时动态技术在土地测量中的应用

GPS实时动态测量技术相比各种传统的测量技术和方法,有其独特的优点。本文通过介绍GPS实时动态技术的构造以及测量原理,分析了GPS实时动态技术在土地测量工作中的优势,并给出了GPS实时动态技术在实际测量工作中的应用方法。     

大型物流仓储类建筑防火安全设计方法探析

随着中国物流产业的蓬勃发展,越来越多大型物流仓储中心出现,但是随之而来的一些消防问题也摆在眼前,如防火分区面积过大、疏散问题、消防设施布置等。运用了性能化防火设计评估的方法对类似建筑进行分析模拟,并提出相关优化方案是一个比较可行的解决办法,通过该方法能够提高建筑安全性,增加设施的可靠性。     

浅谈驻波检测的一种有效方法研究

本方法在校准点处开路、匹配以及接任一固定失配负载的情况下,在环形器后面进行驻波检测。用所得数据对反馈信号进行校准处理,通过反馈时域系统传输函数和反射时域系统传输函数获得驻波检测值。其驻波检测精度高,误报警率很低,具实用价值。     

Dynamic land use and land cover changes and their effect on forest resources in a coastal village of Matemwe,Zanzibar, Tanzania

Recent land cover change estimates show overall decline of tropical forests at the regional and global scales caused by multiple social, cultural and economic factors. There is an overall concern on the prevailing land use practices, such as shifting cultivation and extraction of forest materials as agents of forests losses, but also new, emerging land uses are threatening tropical forests. Understanding of the long-term development and driving forces of forest changes are needed, especially at local levels where many decisions on forest policies and land uses are made. This paper addresses the importance of such information for improved estimates of forest dynamics by studying local level land cover and land use changes during the last 50–70 years in the Eastern African tropical island of Zanzibar, Tanzania. The paper discusses the role of traditional and new land uses mainly subsistence farming, tourism and government interference through tree planting, in the long-term development of the forests at the village level. The material for the study is gathered from the interpretation of archival maps and aerial photographs combined with contemporary digital aerial photographs. The analyses are based on the mapping, spatial sampling and spatio-temporal change trajectory analysis (LCTA) of forest land cover, forest land uses and settlement patterns with GIS and statistics. Six distinct forest land cover change trajectories were identified and these illustrate dynamic and heterogeneous nature of the forests. Closed forest cover has dominated throughout due to cyclical land use patterns, but over 70% of the land area has been continuously transforming between closed, semi-open and open land cover conditions. Land use turnover rates indicate that hardly any forest areas are left untouched from the forces, which remove and re-establish forest vegetation in the long run. Land cover and land use change trajectories are spatially fragmented in the studied landscape. Majority of forest loss-gain dynamics is caused by shifting cultivation, while forest losses are most dramatic along the coast, where traditional and new land uses meet and land uses pressures are highest. The study suggests that landscape change trajectory analyses, where contemporary and historical information on land uses and land cover changes are spatially linked, can provide valuable aspects into local level forest land use planning and management strategies. For the case study, the findings suggest the following key forest management strategies for consideration: (1) establishment of a protected forest/scrubland in participation with the local stakeholders, especially the farmers, (2) promotion of areas for permanent agricultural practices, while simultaneously introducing management controls in the traditional slash-and-burn farming areas, and (3) promoting new livelihood opportunities for the farmers, who have traditionally been dependent on forest resources, meanwhile introducing alternatives for fuel wood for cooking.