This paper analyzes the cost efficiency and optimal scale of the electricity distribution industry in Taiwan. Due to the substantial difference in network density, firms may differ widely in production technology. We employ the stochastic metafrontier approach to estimate the cost efficiency of 24 distribution units during the period of 1997 and 2002. Empirical results find that the average cos...

This study examines the determinants of bank profitability in China over the period 2003-2009. The determinants are divided into three groups: bank-specific, industryspecific and macroeconomic variables. The two-step General Method of Moments (GMM) system estimator is used. The results show that there is a positive relationship between bank profitability, cost efficiency, banking sector develop...

Are organized markets necessary in the U.S. Western Interconnection for cost-optimal integration of renewable energy resources that, in accordance with state mandates, must be brought online in the coming decades? We examine the technological components of the western power grid as well as its political, institutional, economic, legal, and cultural attributes to assess the potential and feasibi...

With the increasing demand of Machine to Machine (M2M) communications and Internet of Things (IoT) services it is necessary to develop a new network architecture and protocols to support cost effective, distributed computing systems. Generally, M2M and IoT applications serve a large number of intelligent devices, such as sensors and actuators, which are distributed over large geographical areas...

data envelopment analysis (dea) measures the relative efficiency of decision making units (dmus) with multiple inputs and multiple outputs. dea-based malmquist productivity index measures the productivity change over time. we propose a dynamic dea model involving network structure in each period within the framework a dea. we have previously published the network dea (ndea) and the dynamic dea ...

1. Introduction Recent advances in photonic cross-connect (XC) systems and their associated switch fabrics are remarkable [1], [2]. Some photonic switches are reported to allow for an abundant switching capability beyond 1000×1000 at the optical path (OP) level. However, the rationale for such large-scale switches has not yet been proven from the viewpoint of network management or operation. Wa...

Sensor network protocols must minimize energy due to their resource-constrained nature. Large amounts of redundant data are produced by the sensors in such networks, however sending unnecessary data wastes energy. One common technique used to reduce the amount of data in sensor is data aggregation. Therefore, we consider the impact and cost of data aggregation in sensor networks to achieve ener...

In this paper the concept of the Minimum Universal Cost Flow (MUCF) for an infeasible flow network is introduced. A new mathematical model in which the objective function includes the total costs of changing arc capacities and sending flow is built and analyzed. A polynomial time algorithm is presented to find the MUCF.

......................................................................................................................................3 I. INTEGRATING DG/RE THROUGH INFORMATED, DECENTRALIZED ELECTRICITY NETWORKS.........................................................................................................4 OVERVIEW..........................................................................

this paper proposes a new mathematical model for designing and planning postal parcels carriage and postal networks. the objective of postal network designing is to determine the location, size and connection between the postal stations in a city, province or country. in this paper, a kind of multiple locations-allocations hub problem with limited capacity in collecting, distributing and broadc...