浅议城市道路绿化植物配置

随着城市建设飞跃发展,城市道路增多,功能各异,形成了各种绿化带。绿化带的植物景观配置大大改善了城市环境条件和丰富了城市的植物景观。使城市景观得以发展,城市内涵得到提升。文章对城市道路绿化的植物配置方法和技术要求进行了阐述。     

Controlling Rhododendron ponticum in the British Isles: an economic analysis

What resources should be committed to the control of invasive species? This study is based on a survey of nature conservation and forestry authorities, wildlife trusts and private landowners which investigated the extent of the ecological and economic impacts of the invasive non-native plant Rhododendron ponticum in the British Isles. There are data on 52,000 ha of land affected by R. ponticum, more than 30,000 ha of it in nature reserves. For nearly all nature reserves, displacement of native species and habitat changes were both reported. In 2001, respondents controlled 1275 ha of R. ponticum at a cost of pound 670,924. To test the optimality of this, we apply a model of social expenditure. The external costs of R. ponticum control are estimated from the probability that it will spread to contiguous sites and the damage done on invaded sites. These are then used to calculate the socially optimal level of expenditure on R. ponticum control, and the funding gap it identified by comparing the result with current levels of expenditure. The results suggest that a socially optimal level of control effort requires a significant increase in social funding for R. ponticum control, although the size of the increase varies between landholders.     

路面不平度时域模型模拟方法研究

路面不平度是引起汽车系统振动的重要激励,路面不平度时域模型是研究公路运输平顺性的基础。本文根据国标GB/T 7031-2005中对路面不平的相关规定,研究讨论了路面不平度时域模型模拟常见的傅里叶逆变换法、谐波叠加法、滤波白噪声方法,对三种方法进行简单对比,并给出相应的实用范围。     

从斯德哥尔摩到约翰内斯堡的发展道路

文章详细论述了从斯德哥尔摩人类环境会议到约翰内斯堡可持续发展会议召开的三十年间，人类经历了从工业文明走向绿色文明三个历史过程的发展之路。     

Road transport fuel demand in the LDCs

Over the last decades, oil consumption in the developing countries hus been increasing rapidly. Road transport has accounted for most of this increase in demand. It is the thesis of this paper that future growth in oil demand in developing countries will occur mainly in the road transport sector and that this growth will be surprisingly strong. Estimated income and price elasticities for several developing countries are presented and forecasts for oil consumption in road transport in the developing countries up to 2010 are given.     

蚌埠市的生态建设之路

昨天,我专程到鲍家沟施工现场去看了一下,挖掘机正在清淤呢!4月20日,一名网友将自己的所见发布在蚌埠市当地的     

Application of Decision Analysis to Forest Road Deactivation in Unstable Terrain

Resource managers require objective methodologies to optimize decisions related to forest road deactivation and other aspects of road management, especially in steep terrain, where road-related slope failures inflict extensive environmental damage. Decision analysis represents a systematic framework that clearly identifies real options and critical decision points. This framework links current decisions with expected future outcomes and provides advantages such as a common currency to systematically explore the liability consequences of limited budget expenditures to road deactivation and other road-related activities. Furthermore, the decision framework prevents the analysis from becoming hopelessly entangled by the vast number of possibilities generated by the alternative occurrences, magnitudes, and consequences of landslide/debris flow events and provides the information required for the first step of an adaptive management process. Here, a structured analysis of potential environmental risks for a road deactivation project in coastal British Columbia, Canada is presented. The application of decision analysis generates a ranking of the expected benefits of proposed deactivation activities on various road sections. The ranking distinguishes between road sections that offer high expected benefit from those that offer moderate to low expected benefit. Seventeen of 171, 100–m road segments accounted for 18% of the cumulative cost and 98% of the cumulative expected net benefits from road deactivation. Furthermore, the cost of deactivating a section of road is related to the expected benefit from such deactivation, thus providing the basis for more effective resource allocation and budgeting decisions.     

Measuring an Organization's Performance: The Road to Defining Sustainability Indicators

This article proposes an integrated procedure to assess sustainability indicators that organizations can use to satisfy international requirements for sustainability. The indicators are related to key aspects of organizations, and their development includes comparing them to the results and policies of various other organizations that are seeking to achieve sustainability. The methodology we used is based on a bibliographic review, and it is intended to:

• Diagnose the state of the art of organizational sustainability,
• Provide organizations with tools to perform benchmarking based on the results, and
• Provide processes to identify best sustainability practices.

After benchmarking, organization managers will be able to adjust the methodology to quantify the sustainability indicators that are most suited to their organization's profile in regard to the activities, products, and services that it offers. Critical factors for organizational sustainability are identified and integrated into the systematic approach proposed in this article to assess indicators, communicate results, and make recommendations for corrective action and continual improvement considering the organization's baseline condition (the starting condition of the organization).     

探索军民一体化保障发展之路

信息化武器装备的保障能力是现代战争中装备能否发挥最大效能的关键。加快军民一体化武器装备发展,加强军民一体化保障体系建设,增强装备保障实力,提高装备的战斗效能。本文对军民一体化保障国内外发展进行阐述,对发展基本途径进行分析,并探索一体化武器装备保障的发展之路。     

用数控电子─液压振动台模拟整体大件产品的公路运输试验

本文简述运输环境和试验条件的制订。对模拟运输试验的各种方法作了简单评述 ,尤其是对利用电子─液压振动台对大型整体产品在悬臂梁状态的试验作了介绍。最后说明一种能模拟带有高峰值随机振动的试验技术 ,以改进现有数控设备的不足。     

A Soft Systems Approach to Watershed Management: A Road Salt Case Study

Watershed management requires integration of social and ecological understanding. Participatory approaches to planning and management incorporate stakeholder knowledge and understanding. An action research strategy using focus groups with Michigan State University operations units helped generate a soft systems model of watershed impacts of organizational decision-making regarding road de-icing. The results reveal tensions and inconsistencies between the mission and operation of the institution. These tensions are exacerbated by inadequate communication among various elements of the campus watershed management system. The action research approach facilitated the researchers understanding of the complex institutional system and helped identify possible areas for making improvements. Specifically, the researchers were able to facilitate improvement in some linkages between scientists developing campus watershed models and the operations staff responsible for handling many of the inputs being modeled.     

学习借鉴,走跨越式发展之路

论述了为实现全面建设小康社会的发展目标，必须走跨越式发展之路。     

混合振动试验在汽车电子装备中的应用和要点

环境试验方法国家标准试验Fi：振动 混合模式（GB/T2423.58-2008）已经发布。彩混合振动试验的《道路车辆电气及电子设备的环境条件和试验》国家标准（制订征求意见稿）已经公示。文内介绍了混合模式振动试验在汽车电子装备中的应用,以及混合模式振动试验的过程要素和试验的技术要点。     

田家庵电厂的减排之路

当得知火电厂新标准实施时间表的时候,包文运显得很淡定,他笑着说,＂该来的总会要来,你只有去适应新的标准。＂ 包文运是安徽电力股份有限公司淮南田家庵发电厂安监部副主任,这位在田家庵电厂待了二十多年的环保“老兵”,对于田家庵电厂有着深厚的感情,企业的每一个环保举措他都了如指掌。     

走向生态文明之路

本文提出了防止生态破坏,走向生态文明的几点建议。     

国外酸雨试验研究动态

酸雨对环境污染和材料的侵蚀性日趋严重,近年国外对其影响开展一系列试验研究。本文介绍其试验研究的一些情况。     

用数控电子——液压振动台

本文简述运输环境和试验条件的制订对模拟运输试验的各种方法作了简单评述,尤其是对利用电子－－液压振动台对大型整体产品在悬臂梁状态的试验作了介绍。最后说明一种能模拟带有高峰值随机振动的试验技术,以改进现有数控设备的不足。     

提高大学英语听力之浅见

针对大学生听力存在问题进行分析，从师生教与学两个角度提出了相应的对策，选择适合学生水平的听力资料，激发听力兴趣，树立听力信心，进行多途径的听力训练，养成良好的听力和英语思维习惯，增强语言运用的频率等，以期达到语言学习的目的。