跨道监控系统设计与应用

设计了一套基于视频的机动车跨道违章监测系统,系统的硬件平台由工控机,摄像机组成.首先由平均算法得到良好的动态背景图像,并由Hough变换法提取车道线;在车辆检测过程中提出了背景差法与边缘提取法相结合,车道线辅助识别的两次目标轮廓提取算法,从而获得完整准确的运动目标轮廓;在违章判别中提出了简易准确的跨道违章判别算法;最后使用均值漂移算法对运动车辆进行跟踪,并结合卡尔曼滤波器预测车辆在下一帧的位置.通过实际道路测试,该系统具有一定的实时性、准确性和智能性,可应用于智能交通监控领域.     

自动检测违章车辆的方法

为了自动检测违章车辆，提出一种利用统计模型和目标灰度场结构信息的算法。该算法是从视频图像中自动检测和动态跟踪违章车辆，它包括3个处理步骤：第一，利用车辆违章时的统计特征，发现视频图像中包含违章车辆的第一帧；第二，利用第一帧图像对违章车辆进行定位，即动态跟踪的起点；第三，对违章车辆进行动态跟踪。给出和研究了3种检测跟踪方案。仿真试验结果表明，用统计模型检测违章车辆具有一定的柔性，并具有较强的抗噪性和稳定性。     

交通违章视频检测管理系统的设计与实现

针对交通违章的检测和管理，设计了一种基于视频检测技术的违章检测管理系统。给出了系统的组成结构和工作流程，定义了系统的功能，设计和实现了系统的功能模块，并分析和讨论了系统的技术难点。该系统利用视频图像处理和图像识别技术，对交通视频图像进行分析，能有效的检测出车辆违章行为(误检率低于10％)，抓拍违章车辆图像(成功率95％以上)，记录和管理违章车辆信息。应用结果表明，该系统较好地实现了对机动车越线类违章的检测与管理。     

基于计算机视觉的红灯违章车辆检测算法研究

车辆闯红灯的违章抓拍作为智能交通管理系统的核心,其依托于计算机视觉对运动车辆的检测识别和跟踪,是目前国内外研究的热点.受外部环境的噪声影响,对于车辆的精准定位是该项研究的难点.重点对高斯模型视频检测算法进行研究,针对其存在的实时性不足、受噪声影响较大的问题,引入了改进的帧间差分算法调整算法的稳定性和准确性,同时也极大地...     

监控视频中的移动目标侦测算法研究

针对违章停车人工检测方式存在的准确率低、成本高且难以实时判断等缺点,文章提出一种监控视频中的移动目标侦测算法,用来检测和识别违章停车。该算法采用混合高斯模型进行背景建模,用以检测监控场景中的运动目标,并通过支持向量机(support vector machine,SVM)分类器判断运动目标是否为监控车辆,如果是监控车辆,则根据车辆停留时间将车辆分类,一旦发现违停车辆,系统会发出报警。实验结果表明,该算法准确率高、实时性好。     

改进人工人群搜索算法在基于LBS物流配送中的应用

以基于LBS物流系统的物流车辆路径规划为研究对象,将一种改进人工势场法与人群搜索算法相结合,对LBS系统中物流车辆的路径规划进行优化.该算法首先利用LBS系统获取环境信息,包括车辆、目标和障碍物的位置和速度信息,其次在基本人工势场法的基础上加入速度因子,使配送车辆初步形成能躲避障碍物并追踪动态物流对象的可行性路径,随后利用人群搜索算法,在可行性路径中搜索最短路径,进而生成物流车辆至动态物流对象的最优路径.该算法有效的将改进式人工势场法和人群搜索算法紧密结合在一起,通过仿真实验证明了该算法在基于LBS的物流系统中物流配送路径规划的有效性,同时将该算法与传统路径规划A*算法进行对比,证明该算法有效的提高了系统中的整体搜索效率.     

基于视频车辆轨迹模型的交通事件自动检测方法研究

 研究了车辆违章逆行、停驻、掉头、倒退、变道五类具有潜在危险的交通（违章）事件,并且运用了基于视频的交通事件自动检测技术所涉及的目标提取、车辆跟踪和事件理解与描述3个步骤实现交通事件的检测。着重研究并分析了车辆跟踪得到的行驶轨迹点,将复杂的车辆轨迹分解为前行、反行、停滞、斜行四类轨迹元素,并且根据4类轨迹元素对车辆的行驶行为进行数学建模,最后通过模型制定合理的检测算法。实验表明,该算法可以有效地区分正常车辆与事件车辆,能够快速准确地检测上述5类交通事件。     

基于阴影线的智能车辆检测及测距方法研究

针对当前智能车辆检测算法在实际应用中存在误差、测量结果不够准确等问题,使用基于运动车辆中车底阴影线算法的车辆检测机制,并利用车底阴影稳定存在特征解决车辆检测问题,进一步基于机器视觉的双目立体匹配测距方法实现对前方最近车辆距离测量,为智能车辆及驾驶员辅助系统提供信息。笔者采用的车底阴影线方法及双目测距最终实现结果证实,可以获取较为精确的道路前方的车辆及距离信息,有效检测距离为10 ～ 50 m,整体识别率达到85%。     

基于HDL-64E激光雷达道路边界实时检测算法

为了使智能车辆在多种道路环境中能够快速有效地提取前方道路,文章提出一种基于HDL-64E激光雷达的道路边界检测算法。该算法首先对激光雷达数据进行空间邻域分析,获取平滑度特征图像;然后利用自适应方向边界搜索算法获取候选道路边界激光雷达数据;为了解决激光雷达数据中存在的干扰及不连续问题,对候选道路边界激光雷达数据进行聚类分析及曲线拟合。实验结果表明,在高速、城区以及乡村道路环境下,该算法能够实时、准确地提取道路边界信息,满足智能车辆道路环境建模及路径规划的需要。     

企业服务金桥

科技强警:“恒通眼”智能管理系统由北京华恒通信息系统有限公司开发的“恒通眼”智能管理系统,是应用于高速公路交通安全管理的系统。该系统采用了计算机视像、人工智能、模式识别、大型数据库管理等国内外先进技术。它是集违章自动监测、检测、路况监控、车辆布控、治安卡口、报警显示、触摸查询、卡口动态图像监控等功能为一体的交通治安管控系统。此系统得到了公安部的充分肯定,并正在多处公安交管部门管辖的道路上推广。“红头文件”电子传:书生电子公文系统书生电子公文系统是采用数字化技术传输红头文件的电子政务软件,可使发送红头…     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that