Intelligent transportation systems: an impact analysis for Michigan

Are Intelligent Transportation Systems (ITS) affecting transportation industry only? ITS are currently perceived as a contribution to transportation industry only; however, by quantitatively analyzing the economic impact of ITS on the state of Michigan, this work attempts to answer the posed question. The quantitative economic analysis is carried out through the well‐established Leontief's Input–Output (I‐O) model. This model is employed to establish ITS effects on each industry by detailing RIMS II I‐O tables for Michigan constructed from the national I‐O tables. Major savings by ITS identified as reduced time delays and fuel cost savings are quantitatively simulated thereby generating an overall cost reduction factor which is incorporated in Michigan I‐O tables to modify their characteristics. ITS impact on each industry in I‐O tables is achieved by maximizing effects on certain selected industries. Impact multipliers that are customary macro‐economic measures for I‐O analysis are then calculated for all the aggregated industries. Multipliers comparison for the three cases namely before ITS implementation, conventional improvement methods, and after ITS implementation is evaluated. These values suggest greater economic benefits that may be achieved by statewide implementation of the ITS. Copyright © 2010 John Wiley & Sons, Ltd.     

改扩建项目造价文件编制的几个难点

通过潼关至西安、西安至宝鸡高速公路改扩建项目造价文件的编制,阐述改扩建项目在造价文件编制过程中特别要注意的几个难点,可供同行参考和借鉴。     

论中小企业成本控制与财务管理目标

在市场经济体制中,传统的成本管理思想已不能适应现代成本理念,现代中小企业成本管理的内容不仅仅是孤立地降低成本,而应立足于整体战略目标及企业外部环境,从成本与效益的对比中寻找成本最小化。     

如何降低建设项目施工阶段的工程成本

工程成本控制主要是放在内部管理上,特别是直接工程费和工期的有效控制,其次外部的市场因素和施工阶段的变更索赔也是着重考虑的一个方面。结合近几年所经历过的工程盈亏情况谈谈如何降低建设项目施工阶段的工程成本。     

灰色模糊估算模型在工程造价中的应用

通过选择预估工程按照模型计算分析,系统研究将灰色系统理论应用到模糊估算中,灰色模糊估算模型计算的单方工程造价既考虑各个工程横向特征的相似程度,也考虑纵向发展态势的变化。将两者结合起来,探讨建立一个新的指标-综合相似度。     

The econometric estimation of airports’ cost function

The econometric estimation of cost functions has been proposed in the literature as a suitable approach in order to obtain estimations of marginal costs, efficiency levels and scale elasticities for transport industries. However, regarding the airport industry, no significant attention has been paid in developing an airport-specific estimation methodology rather than adapting the procedures applied to other industries. The lack of comparable airport data is one of the causes which could explain the scarcity of this literature in the past, as well as the use of very limited approaches to explain airport technology. This paper tries to overcome these limitations by developing an airport-specific methodology to estimate a multi-output long-run cost function using an unbalanced pooled database on 161 airports worldwide. The specification of hedonically-adjusted aircraft operations, domestic and international passengers, cargo and commercial revenues in the output vector, as well as the calculation of input prices are discussed. Both technical and allocative inefficiencies are specified in the model using a Stochastic Frontier method that has been estimated through Bayesian Inference and Markov Chain Monte Carlo methods.     

造价工程师在项目管理中的投资控制

投资控制工作的方法是否合理,直接影响到工期和质量,投资控制工作的好坏,直接影响整个项目的的管理效果,在保障工程质量和工程进度的前提下,保证工程投资不超投资计划。     

重载交通下桥梁的寿命周期成本

从寿命周期成本的角度分析了重载交通下桥梁的建设成本与养护、维修成本间的关系，并提出了提高桥梁经济性、安全性和耐久性的几点建议。研究认为，在决策与设计过程中推广寿命周期成本的理念，将建设成本与使用成本综合起来加以统筹考虑，进行最优组合，加大建设时的资金投入，减少维修、养护费用，是提高重载交通下桥梁的安全性、经济性、耐久性的可行方法。     

工程目标成本测定研究

阐述工程目标成本的重要性,讨论工程目标成本的测定程序和方法,重点从现场直接工程费、措施费、现场管理费等三方面指出具体测算办法.     

交通建设投资项目费用控制探析

当前，我国交通事业发展迅速，但也面临着项目费用高、规划不完善导致资金缺口严重等诸多问题。鉴于此，从交通建设投资所涉及到的相关费用的控制管理入手，分析投资费用控制的主要内容，进而提出控制投资费用、提高投资效率的建议措施。