帕杰罗V97自动变速器电控系统元件功用和检修

简要介绍新型帕杰罗V97装用的INVECS—ⅡV5A5自动变速器电控系统的工作原理,详细论述电控元件的功用、工作原理和检测方法。     

顶进法施工地道桥路堑边坡综合防护设计

以国道325线北罗坑路堑地段框架地道桥顶进法施工条件下的边坡防护设计为例,经综合对比分析,确定采用以土钉支护为主的综合防护设计方案,通过稳定性检算,设计符合规范要求,工程取得良好效果。     

高精度调整垫片加工工艺研究

本文通过对曼桥用的某种高精度调整垫片加工工艺的分析,试验和研究,提出了保证高精度调整垫片形位公差的工艺方法,为高精度调整垫片的加工指出了一条实用的思路。     

工学结合模式下高职公共英语教学改革的探索

工学结合已经成为新形势下加快职业教育发展的根本出路。本文就高职学生现状及目前我国高职公共英语教学中存在的问题,提出了在工学结合培养模式下高职公共英语教学改革的措施,以便更好地增强高职公共英语的实用性和职业性。     

Real-time follow-up head tracking in dynamic complex environments

In the modes of both object motion and camera motion, an enhanced Camshift algorithm, which is based on suppressing similar color features of background and on joint color probability density distribution image, is proposed to real-time track head in dynamic complex environment. The system consists of face detection module, head tracking module and camera control module. When tracking fails, a self-recovery mechanism is introduced. At first the Adaboost face detector based on Haar-like features is implemented to find frontal faces, the false positive is filtered according to the skin color criterion, and the true face is used to initialize the tracking module. In hue saturation value (HSV) colorspace, the hue-saturation (H-S) histogram of face skin and the saturation-value (S-V) histogram of hair are built to produce the joint color probability density distribution image, and this is intended to realize the head tracking with arbitrary pose. During tracking, region of interest (ROI) is introduced, and the color probability density distribution of a specified background area outside the ROI is learned, similar color features in the head are suppressed according to the learning result. The background suppression step is intended to resolve the problem that the tracker maybe fails when the head is distracted by backgrounds having similar colors with the head. A closed loop control model based on speed regulation is applied to drive an active camera to center the head. Once tracking drift or failure is detected, the system stops tracking and returns to the face detection module. Our experimental results show that the presented system is well suitable for tracking head with arbitrary pose in dynamic complex environments, also the active camera can track moving head smoothly and stably. The system is computationally efficient and can run in real-time completely.     

离散型具有时滞复Volterra方程出现4-周期轨道解的条件

给出具有时滞复Voherra方程的离散型,讨论了离散型具有时滞的复Volterra方程出现4-周期轨道解的条件,并证明了系统存在与此4-周期轨道解一致的4-周期的初始函数对．     

浅谈管道施工拖管技术的应用

拖管法是非开挖施工技术中的一种,该方法利用导向钻机安装管道,大大提高了施工速度,并对周围管道和环境减少了破坏性。太原市大同路改造工程中污水拖管技术的应用在太原市市政工程施工中尚属首例。     

一种新型数普兼容式车床的改造设计

本文介绍的是一种新型的车床结构,以数控系统为底层,兼容数控操作和手动操作。整合了数控车床的高精度、高效率、高速度等优点,同时具有普通手动操作车床的操作简易性。开创了一种新的车床制造理念。既可以数控编程操作,实现其数控车的优点,又可以如普车操作一般手动操作,实现车床操作的简易化,两种操作界面,适合不同背景的操作者使用。     

基于形态检测与深度学习的高空视频车辆识别

为了准确提取广域场景道路交通信息,本文融合形态检测与深度卷积网络,提出了无人机视频车辆定位及车型识别方法. 首先,基于形态检测建立候选目标提取算法,并构建了含244 520 个无人机视频车辆样本的深度学习图像基准库;然后,通过增加卷积层、池化层及调整网络参数等方法对AlexNet 进行重构,提出了改进模型AlexNet*;最后,建立了基于候选目标提取算法与AlexNet*的车辆识别方法. 验证分析显示：AlexNet*的图像分类F1 均值达 85.51% ,优于AlexNet(82.54% )、LeNet(63.88% )、CaffeNet(46.64% )、VGG16(16.67% ) 及 GoogLeNet(14.38%);本文车辆识别方法对小汽车及公交车的正检率、重检率和漏检率均值分别达94.63%、6.87%、4.40%,可有效识别无人机视频目标.     

炭罐丁烷工作能力测试方法

分析了燃油蒸发污染物控制装置(炭罐)的汽油工作能力测试方法的利弊,在国内首次提出了炭罐丁烷工作能力的概念和测试方法,并对其进行了一系列的讨论,为国内的炭罐检测方法提出了新的思路。