基于DSRC和CDPD的先进公交系统

本文首先讲述了ITS中的2种通信技术——专用短程通信（DSRC）和蜂窝数字分组数据网（CDPD）的基本概念、工作原理及系统特点等，然后提出了一种基本这2种通信技术的先进公交系统，并对各个子系统的功能结构进行了描述。     

A cellular automata-based land-use model as an integrated spatial decision support system for urban planning in developing cities: The case of the Bogotá region

Bogotá and the 17 neighboring municipalities make up one of the biggest metropolitan areas in Latin America. However, despite strong functional interactions within the area, there is no official government body at this level in charge of coordinating authorities and providing solutions to the wide variety of issues arising in the regional urban land system. Aiming at providing an insight on future land-use developments linked to new transport infrastructures and at offering a tool to support territorial decision-making, this paper presents a cellular automata-based (CA) model based in Metronamica® software, that allows testing different scenarios based on potential land-use policies, environmental suitability and transport alternatives.There has not been, so far, an urban planning tool that accounts for the complexities of this region. CA-based land-use simulations constitute a useful approach to understanding the impacts of urban planning policies and regulations. This tool can help to improve inter-territorial and inter-institutional coordination, which through planning and management policies seek a spatially integrated development, with a long-term perspective.The CA-based model proposed was calibrated to reproduce land-use changes between 2007 and 2016 using different methods and indicators. The model was used to simulate and analyze eight scenarios with different policy directions of transport infrastructure in the future of the region. The results of the simulations reflect the dynamics of territorial occupation. The calibration indices in the experiment indicate a high degree of suitability for the CA Bogotá model, proving its effectiveness and potential as a useful tool for decision-making. The results show that occupation scenarios with restricted developable zones within the city, tend to have the greater dispersion rate in the study area, compared to scenarios where land development plans are promoted in Bogotá, which representing a more compact development.     

Cellular phone etiquette among college students

There has been tremendous growth in the cellular telephone industry in recent years. This evolving technology has given rise to concerns over the social rules of etiquette governing cellphone usage behaviour. The present study was undertaken to better understand the perceptions of cellphone usage propriety among one of the most important target markets for cellphone products – young adults attending college. Data were collected from a total of 383 cellphone consumers residing in geographically diverse regions of the United States. Overall, the results indicated a high degree of agreement among respondents as to appropriate and inappropriate situations for cellphone usage. Respondents considered inappropriate situations for cellphone usage to include during worship/church, during class, in a library and in a movie theatre during a movie. Respondents considered it to be appropriate to use cellphones while on public transportation, in a supermarket, and to use a hands‐free set while driving. Specific differences were found as a function of geographic regions, gender and employment status.     

细胞自动机在棋盘格角点检测中的应用

根据细胞自动机组成单元简单，单元之间作用具有局部性的特点。本文将细胞自动机的模型应用到棋盘格的角点检测中，棋盘格模板被广泛的应用在摄像机标定中。使用matlab为工具对模型进行了开发，实验结果表明，该细胞自动机模型是一种简单有效的棋盘格角点检测方法。     

Israeli cellular telecommunications policy

Recent research has emphasized the role of regulatory measures in the adoption of new technologies, specifically mobile telephony. This study describes in detail the three phases of cellular licensing in Israel. It surveys policy changes and questions their contribution to the public interest, while discussing their underlying objectives. It reveals a pattern by which Israeli regulatory policy has shifted from a public interest focus to a government interest/corporate interest focus.     

IP MICRO-MOBILITY协议初探

当移动节点在改变存取网络的附着点时,常常必须利用移动式IP(mobile IP)来达到联机不中断.Micromobility protocol则是为了更进一步确保当移动节点在同一个网段下的基地台间作快速移动时,达到快速换手(fast handoff),并在换手的过程中减少封包的丢失,以达到流畅换手(smooth handoff)的目的.除此之外,Micromobility protocol的设计也兼顾能源损耗与频宽使用的问题题.     

Symmetrical design of strategy-pairs for enplaning and deplaning an airplane

Enplaning and deplaning processes are two main activities that passengers experience in an airplane. They are also the main factors contributing to the airplane turn time. Thus, both processes need to be carefully considered when designing a new strategy. The main contribution of this paper is twofold. Firstly, we propose a symmetrical design of deplaning strategies to match three typical grouped enplaning strategies (back-to-front, windows-to-aisle and reverse pyramid), in which the groups are organized in a LIFO (Last In First Out) manner. Secondly, we present an integrated cellular automaton model to describe the dynamic characteristics of passengers in the enplaning and deplaning processes. Numerical evaluation results indicate that the proposed windows-to-aisle and reverse pyramid strategies perform better in the following aspects: (i) the total operation time decreases; (ii) the two strategies are less sensitive to the load condition, e.g., luggage distribution and cabin occupancy rate; (iii) passengers’ satisfaction is enhanced since both individual waiting time and processing time lower down; (iv) the two strategies are fairer for the passengers since the difference among the groups remarkably shrinks.     

蜂窝移动电话定位技术

本文介绍了蜂窝移动电话的定位方案，讨论了各种方案的优缺点，分析了基于网络定位方案的TDOA的计算方法和定位原理。     

基于制造企业生产流水线的改造

随着制造业技术的不断发展,流水线生产方式在制造企业中发挥重要作用。本文阐述了流水线生产方式的优势以及流水线生产方式带来的人性化管理问题。最后结合制造企业的经营目标与管理的柔性化需求提出了一种新的生产方式——细胞式生产方式,并进一步证实这种生产方式的可行性与不足之处。