GPS系统在车辆调度与安全中的运用

一、出租车方案 GPS车辆监控调度系统,是一套采用了GPS全球卫星定位技术、GIS地理信息系统和无限数据通讯技术,可对移动车辆进行实时监控和调度的集群指挥系统。安装在车辆上的GPS定位仪可以实时确定车辆的位置信息,包括:经纬度、速度、方向等。通过车载无线数据通讯系统,将车辆定位信息传送到指挥监控中心,并显示在电子地图;同样车载无限数据通讯系统也可将指挥中心的命令传送至移动的车辆上。通过上述方式完成了车辆的监控调度功能。利用GSM     

新闻事件:大学生研发“智能公交”可查公交车距离、打免费WIFI游戏

近期,由哈尔滨工程大学自动化学院、信息与通信工程学院6名学生组成的"程天科技"队正致力于研发"智能公交"系统据团队负责人胡博介绍,所谓"智能公交"是在原有公交车基础上配装一个车载终端系统,它的作用是GPS定位、车辆监控、数据传输等。一     

用GPS卫星定位技术进行露天矿边坡监测——霍林河露天矿边坡变形监测试验

本文重点叙述用GPS静态相对定位技术进行边坡监测的具体方法.实践证明了用GPS定位技术进行边坡监测的优越性并得出了一些有关的结论.     

利用MCS-51单片机数控系统改造花键轴铣床

介绍了利用MCS 51系列单片机8031研制经济型数控系统,进行花键轴铣床数控改造的方法。详细讨论了数控系统的硬件组成和软件功能设置,以及各芯片之间的连接关系。原铣床经数控化改造后,扩大了其加工范围,能满足不同锥度花键轴零件的加工。MCS 51系列单片机数控系统具有经济、实用、灵活的特点,是当前工矿企业机床数控改造的有效途径。     

GPS定位技术在道路桥梁施工测量中的应用

由于国内桥梁建设多处于跨度大、地貌多样、地形复杂的施工环境，传统的道桥施工测量技术已无法满足实际施工的要求[1]。在此基础上，合理引进智能化GPS定位技术实现道桥施工的科学测量十分必要。将GPS定位技术同道路桥梁施工测量进行有效结合，在分析GPS技术特点的基础上，从多方面分析GPS定位技术在道路桥梁施工测量的具体应用，旨在为提升道路桥梁施工测量水平献计献策。     

GPS信号预处理技术的实现

随着GPS全球定位系统的不断完善,GPS定位系统在硬件和软件的应用领域也不断发展。GPS接收机是GPS系统的核心设备,而GPS工作的关键是正确的信号同步。一般认为,GPS信号预处理是GPS精密定位数据处理中非常重要的一步,预处理质量直接影响到最终的定位结果。探讨GPS信号预处理存在的问题,解析A/D转换的要点并利用MATLAB仿真软件进行试验。     

智能旋浆式水流流速仪研发与设计

现有的旋浆式流速仪计算速度慢,定位需要配套设备,不能实时传输数据,不便于在紧急情况下使用。为此,设计了一种集GPS定位、蓝牙传输功能于一体的智能旋浆式水流流速仪,仪器采用STM32F103单片机,采用滤波方法减弱信号毛刺对流速仪测流精度的影响。实际测量表明,该仪器测流更稳定、速度更快、精度更高、实时性更好。     

全球定位系统

当今社会，私人购车急剧上升，公路货运不断增加，促进了汽车行业的发展，同时也带来了诸多的问题，如：公共设施短缺，塞车、交通事故频频发生等等，造成严重后果。现在，有关人士已在将全球定位系统运用于交通管理上。那么何谓全球定位系统呢？全球定位系统（GPS）是为美国国防部的需要研制而成的。今天，它已广泛地用于非军事目的的各领域。GPS主要靠24颗与地球相距1800km并围绕着地球的卫星来实现。也就是说，将GPS运用于交通，是利用GPS，借助数据一语言传输装置，实现卫星汽车定位。然后将有关交通安全的信息和道路状况的信息以…     

基于移动GIS油气管线巡检系统设计

本文设计的系统将移动GIS技术引入到油气管线巡检的日常工作当中是一个新的尝试。由GPS巡检终端机、GPRS移动数据网络、监督调控中心、GIS地理信息系统组成。在正常工作中,沿线巡检人员佩带GPS巡检终端机,巡检机可将沿线巡检发现的问题、情况拍照或编辑语言信息,附带将该点经纬度、时间等信息,一并通过GPRS移动数据网络实时发送给监督调控中心的服务器。     

GPS卫星定位原理及其测量系统在矿山开发中的应用

本文主要阐述了GPS卫星定位的基本原理、GPS测量系统的主要内容、主要特点、主要性能以及应用推广情况与效果等问题。通过实践检验表明，本系统已经具备了产业化生产的能力。本系统的完成与使用，必将对全野外数字化测和经济效益。     

继电器试验中高频信号采集技术的研究

介绍了数据采集系统的工作原理,对系统中各个环节的参数进行了分析计算。以DSP为核心组成了高速数据采集系统板,充分利用易扩展的优点,继电器分析电路时产生的过电压信号进行采集,应用当时的数字信号处理知识,数字滤波及快速傅立叶变换,对所采集的信号进行幅值与频率的分析与处理,并与记忆示波器所测得的波形进行验证比较,得出实际的过电压波形。     

团队氛围、董事会内部沟通与战略绩效

本文在理论分析的基础上提出研究假设,通过问卷调查的方式搜集数据,以47家企业董事会454份有效问卷为样本进行实证研究,结果表明,团队氛围中的团队信任对董事会内部沟通具有显著的正向影响;团队氛围中的情感冲突对董事会内部沟通具有显著的负向影响;董事会内部沟通对企业战略绩效中的团队学习力、决策有效性和战略一致性均具有显著的正向影响。研究不仅丰富了董事会团队过程理论,而且能够有效地指导公司治理实践。     

遮阳板尺寸计算

遮阳板技术是最近几年发展起来的新兴建筑环保节能技术,同时在美学方面也有很好的效果。笔者结合实际工程经验,简要介绍了遮阳装置的分类、功能和作用,重点论述了太阳位置参数的计算、固定式遮阳板的尺寸计算和可调式遮阳板的尺寸计算,并对遮阳板的优势和前景做了分析和展望。     

Undervaluation of directors in the board hierarchy: Impact on turnover of directors (and CEOs) in newly public firms

Research summary: We examine the consequences of the formalization of the board leadership structure at IPO for board‐level turnover. We introduce the concept of director undervaluation. It indicates the degree to which a director’s qualifications based on normatively accepted criteria for board leadership are not duly reflected in his/her appointments to the board chair and committee chair positions. We find that the higher the average undervaluation of directors on the board (“board undervaluation”), the greater the turnover levels of undervalued directors. This effect is stronger when board interaction frequency is higher. We contribute to the behavioral perspective on corporate governance by introducing justice‐based legitimacy as a key normative institution, and by providing a novel predictor of aggregate turnover of directors (as well as the firm’s CEO). Managerial summary: Why do outside directors exit the board? We offer a novel answer to this question in the context of newly public firms. We suggest that when directors are passed over for the board chair and committee chair positions despite having higher qualifications than their peers, they have been “undervalued,” and a negative board climate is likely to develop. We find that the higher the average undervaluation of directors on the board, the higher the turnover levels of these undervalued directors. More frequent board meetings exacerbate these turnover levels. Further, these turnover effects are not restricted to undervalued directors—even the CEO is more likely to exit. This study demonstrates the critical importance of developing a legitimate and fair board leadership structure.     

董事会资本、高管薪酬激励与企业R&D投入——基于我国创业板上市公司的经验证据

董事会资本、高管激励契约与研发投入之间的关系一直是国内外学者研究的热点和焦点问题。论文基于资源依赖理论和委托代理理论的双重视角,以创业板上市公司为研究对象,采用两阶段最小二乘法,考察了董事会资本对研发投入的影响,以及高管薪酬激励对二者关系的调节作用。实证研究结果显示：（1）董事会资本宽度对企业的研发投入具有显著的正向影响;（2）董事会资本深度对企业的R&D投入具有显著的正向影响;（3）进一步分析发现,高管薪酬激励对董事会资本和研发投入之间的关系具有正向调节作用。     

董事会结构与公司绩效关系的实证研究——以纺织服装业上市公司为例

从董事会规模、独立董事比例、董事长与CEO两职合一等董事会结构特征入手,选取2009-2011年我国纺织服装业上市公司统计年报数据为样本,结合上市公司财务评价指标体系和证监会对业绩评价的规定,采用spss19.0统计学软件,建立回归模型,对董事会的结构特征与公司绩效关系进行回归分析,以期在实证结果基础上,对我国上市公司董事会结构等方面提出合理化建议,不断优化企业经营业绩。     

The relative power of ceos and boards of directors: Associations with corporate performance

A typology of the relative powers of the chief executive officer and the board of directors was derived based on the literature, highlighting four situations: Caretaker, Statutory, Proactive and Participative boards. Data collected from Fortune 500 Industrial and Fortune 500 Service corporations supported the typology. The results showed significant differences among the four board types in their characteristics, internal process, decision-making styles, board effectiveness, and contribution to company performance. Powerful boards were associated with superior corporate financial performance.     

Being the CEO's boss: An examination of board chair orientations

Research summary: Scholars have traditionally conceptualized board leadership as a dichotomous construct. A combined CEO and board chair position is interpreted as reflecting a more collaborative approach to corporate governance, whereas separate positions are interpreted as ensuring greater board control. I challenge this conceptualization and posit that a separate board chair can be oriented toward collaboration as well as—or in place of—control. I analyze newly available data from corporate proxy statements to identify these two board chair orientations and test competing perspectives on how they impact profitability growth in a sample of S&P 500 firms. The results indicate that board leadership is a more nuanced phenomenon than the extant literature would suggest . Managerial summary: What is the role of the board chair when not the CEO ? Corporate governance experts assert the board chair's role is to monitor and control the CEO . Yet, board chairs often play another, more collaborative role. Board chairs frequently provide advice and guidance to CEOs and relieve CEOs of board leadership burdens, enabling the CEOs to focus on their primary responsibilities. In this study, I examine the effect of board chair orientations on financial performance and find that, as with separating or joining the CEO and board chair positions, the profitability implications of the selected orientation are far from universal. Board chairs must consider their firm's performance context in order to get the most out of a particular approach to being the CEO 's boss . Copyright © 2016 John Wiley & Sons, Ltd.     

Social influence effects and managerial compensation evidence from Germany

I extend existing theories of social influence effects on executive compensation while at the same time showing the context dependence of these effects. Using original data on German firms and a longitudinal design, results of this study suggest that the operating of social influence mechanisms depends on demographic and social similarity between CEOs and board chairs. The findings reconcile previous mixed findings on the role of CEO human capital factors such as education and tenure and furthermore show that board vigilance is conditional on board compensation and the presence of major shareholders with an incentive to monitor board behavior. Finally, the study contributes to compensation and corporate governance research by providing evidence on how social influence effects operate outside the United States. Copyright © 2006 John Wiley & Sons, Ltd.     

浅谈发泡水泥在地暖中的应用

介绍了发泡水泥的构成、发泡工艺和发泡设备,并对发泡水泥施工中应注意的事项提出了几点要求;将发泡水泥与苯板进行了详细比较,对发泡水泥广阔发展前景进行了展望,提出了几点合理化建议。