桥梁结构静载试验实施重点及难点分析

针对桥梁结构静力荷载试验的特点,着重提出了试验过程中容易被忽视却至关重要的环节,提出并解决了静力荷载试验中的难点问题。     

铁路分局装车计划智能决策支持系统

在分析了铁路分局日间装车计划工作的特点后,指出掌握车流信息只是装车计划的基础,应建立装车计划智能决策支持系统(IDSS).铁路分局每日的装车计划要考虑装运货物的经济效益,文中提出了装车计划优化数学模型,据此来审批承认车,提高运输经济效益.     

我国建立环境会计的几点建议

就如何建立和发展我国的环境会计提出一些对策和建议,希望我国尽快、有效地建立和发展适合我国的环境会计理论体系和实务核算的相关制度、准则及指南,以缩短我国在环境会计方面与世界发达国家的差距．     

88m超规范甲板驳船的结构强度有限元分析

通过充分利用DNV的Sesam软件和MSC.patran以及MSC.Nastran几个软件的优势,对一艘88m超规范甲板驳船进行了横向强度分析,找出船舶在不同工况下所对应的承载规律。并在频域内采用三维线性势流理论的波浪载荷计算方法对甲板驳船进行了波浪载荷直接计算,分析了不同工况先载荷分布的特点,并将计算结果与CCS规范和DNV规范中的结果进行了比较,为合理选取波浪载荷提供依据。     

Lessons from a Multi-Scale Historical Reconstruction of Newfoundland and Labrador Fisheries

In this article we use a multi-scale, multi-method historical reconstruction of post– World War II social-ecological interactions within fisheries in Newfoundland and Labrador to explore the dynamics of intensification, expansion, and resource degradation in managed fisheries. Our case study draws on landings statistics, other archival information, and the Local Ecological Knowledge (LEK) of fish harvesters to explore these linked dynamics at the macro, meso, and micro levels. By some measures we found large scale trends toward intensification of effort leading to over-harvesting at macro (province wide) levels. At the same time, at the local level (micro-scale) and across sectors and regions (the meso-scale), we found highly fluid fishing practices and a complex suite of stated motivations for change. As a basis for effective governance, an understanding of the dynamics of interactive restructuring in social ecological systems will require multi-scale analyses that are sensitive to this complexity.     

特大桥预应力混凝土连续箱梁满堂式碗口支架方案设计

混凝土连续箱梁施工中，支架为桥梁上部提供了施工平台，同时也是重要的支撑体系，其安全性必须得到充分保证。依据设计图纸和现场实际情况，设计了满堂式碗口支架的方案，并对方案进行了验算。     

城市快速路建设项目的环境影响评价与分析

环境保护是我国的一项基本国策。随着我国国民经济的蓬勃发展,城市快速路建设步伐越来越大。近年来,我国城市快速路总里程不断增长,汽车保有量持续增加,快速路在国民经济综合运输体系中的位置愈来愈重要。伴随着城市快速路的高速发展,快速路污染、快速路对周边环境影响等问题也大量凸现出来。     

Forecasting petrol demand and assessing the impact of selective strategies to reduce fuel consumption

Abstract

The use of fossil fuels in transportation is an important topic as a result of growing concerns over global warming. Automobile petrol demand has been of particular interest to researchers and policy-makers, given that the automobile is a major contributor to the enhanced greenhouse effect. This paper forecasts Australia's automobile petrol demand up to the year 2020 based on the best performing forecasting model selected out of eight models. In order to establish ways to reduce the demand for petrol, and the consequent by-product of reducing the amount of greenhouse gas emissions, we have estimated the impact on CO₂ for several potential policy instruments, using Transportation and Environment Strategy Impact Simulator (an integrated transport, land use and environmental strategy impact simulation programme). We find that a carbon tax of AU$0.50/kg can reduce automobile kilometres by 5.9%, resulting in reduced demand for petrol and a reduction in CO₂ of 1.5%.     

特大桥预应力混凝土连续箱梁满堂式碗口支架方案设计

混凝土连续箱梁施工中，支架为桥梁上部提供了施工平台，同时也是重要的支撑体系，其安全性必须得到充分保证。依据设计图纸和现场实际情况，设计了满堂式碗口支架的方案，并对方案进行了验算。