Article history: Received 26 February 2009 Received in revised form 6 August 2009 Accepted 26 August 2009 This paper addresses the capital mobility among regions within China. Using a range of panel estimators which deals with the non-stationarity of time series components, individual heterogeneity and common unobserved factors, we show that the savings and investment (both expressed as ratios ...

The current fixed spectrum allocation scheme leads to significant spectrum white spaces. It requires a more effective spectrum allocation and utilization policy, which allows unused parts of spectrum to become available temporarily for commercial purposes so that the scarcity of the spectrum can be largely mitigated. This paper is an early attempt to study such wireless networks with opportunis...

This paper addresses the capital mobility among regions within China. Using a range of panel estimators which deals with the non-stationarity of time series components, individual heterogeneity and common unobserved factors, we show that the savings and investment (both expressed as ratios to GDP) are positively correlated for a sample of 28 Chinese provinces over the period of 1978 to 2006. Ac...

Earth pressure balance tunnel boring machines (EPB-TBMs) are favorably applied in urban tunneling projects. Despite their numerous advantages, considerable delays and high maintenance cost are the main disadvantages these machines suffer from. Reliability, availability, and maintainability (RAM) analysis is a practical technique that uses failure and repair dataset obtained over a reasonable ti...

The CPM has proven to be helpful only when the project deadline is not fixed and the resources are not constrained by either availability or time. Resource-constrained scheduling arises as a result of problems with the availability of resources. It is necessary to apply the availability of resources into a scheduling process for this reason. The objective of this paper is to present an optimal ...

The redundancy allocation problem (RAP) has been studied for many different system structures, objective functions, and distribution assumptions. In this paper, we present a problem formulation and a solution methodology to maximize the system steady-state availability and minimize the system cost for the repairable series-parallel system designs. In the proposed approach, the components’ time-...

This paper presents a nonlinear integer programming model to support the selection of maintenance strategies implement on different segments railway network. Strategies are selected which collectively minimise impact sections’ conditions service, given network availability and budget constraints. Different metrics related topology, availability, service frequency, performance requirements costs...