The Impact of Electricity at Work Regulations on the Operation of a Water Company

Since 1 April 1990, the Electricity at Work Regulations 1989 have placed legal requirements on employers, employees and the self-employed to take precautions against the risk of death or injury from electricity in work activities. This paper (a) examines the requirements, (b) reports on an initiative by the Lee Valley Water Company, and (c) proposes a management strategy for an organization to comply with the legislation.     

重塑与复兴——基于城市记忆复兴的广州水泥厂改造规划探析

该研究是关于广州水泥厂改造规划的探索研究,从城市肌理、历史残片、地域文脉等角度紧抓复兴契机,提出因地制宜的重塑手段。水泥厂已经存在多年,百年历程,其原有厂区的历史背景,以及它所积淀的记忆及场所情怀,势必对周围环境、区域规划、周边居民的生活习惯产生很大影响。为了达到对该厂"重塑与复兴"的设计目的,在方法上需要避免强制性"嫁接"模式,而应该采用保护文脉的"顺承"的模式。从留住城市肌理、发现历史残片、承接岭南文化来紧抓复兴契机,并运用宜商宜居、创造活力、景观组织等重塑手段。总之,该项目强调对原有的空间肌理及场所记忆的关注,在更新改造、激发活力的同时,保持对当地文化的继承。     

NON-PARAMETRIC TOPIC MODEL FOR DISCOVERING GEOGRAPHICAL TOPIC VARIATIONS

This paper presents a non-parametric topic model that captures not only the latent topics in text collections, but also how the topics change over space. Unlike other recent work that relies on either Gaussian assumptions or diseretization of locations, here topics are associated with a distance dependent Chinese Restaurant Process （ddCRP）, and for each document, the observed words are influenced by the document＇s GPS-tag. Our model allows both unbound number and flexible distribution of the geographical variations of the topics＇ content. We develop a Gibbs sampler for the proposal, and compare it with existing models on a real data set basis.     

地理信息系统在环保领域的应用综述

地理信息系统是一门以计算机为基础的新兴技术，围绕着这项技术的研究、开发和应用，形成了一门交叉性、边缘性学科，其在环保领域的应用将有力地促进环保工作的开展。本文首先简要介绍了GIS技术，而后综合论述了其在环保领域中的应用。     

公路路线设计系统研究

根据公路路线设计特点,以地理信息系统（GIS）为基础技术平台,应用决策科学及有关学科的理论与方法,探讨了可将公路设计的定性分析转化为定量计算,以人机交互方式辅助设计者解决很难用明确的数学模型或数学公式给出唯一的解的公路路线设计系统。     

宽带中国战略下一户多机的研究和实践

随着国家"宽带中国"战略的发布,高接入带宽为一户多机创造了良好的条件。同时,用户个性化需求日益强烈,家庭内手机、PAD、机顶盒、电脑多种终端使用视频服务等宽带业务将成为常态。文章分析一户多机面临的挑战,提出运营商在一户多机时代的应变之道。     

网格地理信息数据库研究和应用仿真

地理信息系统随着空间数据的不断丰富,各种属性数据的不断加入,数据量呈几何级增长,另外政府和企业各部门之间的地理信息数据相互独立,有很高的自治性,因此地理信息数据管理和数据整合越来越困难.采用基于网格计算的地理信息数据库构建方法,很好地解决了这个问题.这种构建方法整体结构采用网格技术,在网格节点使用分布式数据库,在数据组织上采用多维度,多层次数据组织形式对数据进行分块存储,建立索引网络.很好地解决了数据访问效率、数据扩充和快速整合问题.在试验中证明,这种地理信息数据库构建方法是一种高效的地理信息数据管理和服务提供模式.     

Road network monitoring: algorithms and a case study

Road network monitoring is an activity conducted daily by the Ministry of Transportation of Quebec. The complete network must be monitored every 2 weeks. In this setting, the usual objective in arc routing of minimizing the total travel distance is irrelevant. The vehicles are equipped with global positioning systems (GPS) locating devices to monitor events and trace routes. Since most planned route are not completed because of events on the network, there is a need to continuously re-plan and re-schedule routes. We developed a methodology to achieve this task by gathering data from the GPS trace, matching it to the planned routes within a geographic information systems (GIS) and then use mathematical algorithms to propose a new schedule with new routes. The interurban road network studied consists in a hierarchy of three classes of roads that have different monitoring standards. We tested three different methods using different objectives depending on the operators’ needs. Results show that the method that implies rescheduling based on assignment and reconstruction of routes with an arc-adding method gives the best coverage for each class of road.     

Local Connection Criteria and Single Homeless People's Geographical Mobility: Evidence from Brighton and Hove

In December 2001 Brighton and Hove City Council introduced a set of Local Connection Criteria aimed at stemming the flow of homeless people apparently making their way to the city in search of services. Under the new criteria, only those previously resident in Brighton and Hove can make use of the city's night shelters and hostels. Similar such criteria have recently been introduced elsewhere and represent an important change in local responses to the problems of single homelessness. The paper examines in detail the movements of 41 recently and long-term homeless men interviewed at a night shelter and hostel in Brighton and Hove prior to the introduction of the local connection rule. Finding the majority to have recently moved to the city having become homeless elsewhere, it is suggested that the introduction of such criteria is liable to have a considerable impact on the lives of some single homeless people. Examining the reasons why these men had moved, however, it is suggested that the future movement of single homeless people to the city, or other 'homeless places', is unlikely to be significantly affected by such policies.     

Efficient architectures for sparsely-connected high capacity associative memory models

In physical implementations of associative memory, wiring costs play a significant role in shaping patterns of connectivity. In this study of sparsely-connected associative memory, a range of architectures is explored in search of optimal connection strategies that maximize pattern-completion performance, while at the same time minimizing wiring costs. It is found that architectures in which the probability of connection between any two nodes is based on relatively tight Gaussian and exponential distributions perform well and that for optimum performance, the width of the Gaussian distribution should be made proportional to the number of connections per node. It is also established from a study of other connection strategies that distal connections are not necessary for good pattern-completion performance. Convergence times and network scalability are also addressed in this study.