In this paper a multiobjective optimal design method of interior permanent magnet synchronous motor ( IPMSM) for traction applications so as to maximize average torque and to minimize torque ripple has been presented. Based on train motion equations and physical properties of train, desired specifications such as steady state speed, rated output power, acceleration time and rated speed of tract...

Maintenance helps to extend equipment life by improving its condition and avoiding catastrophic failures. Appropriate model or mechanism is, thus, needed to quantify system availability vis-a-vis a given maintenance strategy, which will assist in decision-making for optimal utilization of maintenance resources. This paper deals with semi-Markov process (SMP) modeling for steady state availabili...

We describe the evolution of productivity growth in a competitive industry with free entry and exit. The exogenous wage rate determines the firms’ engagement in labor productivity enhancing process innovation. There is a unique steady state of the industry dynamics, which is globally asymptotically stable. In the steady state, the number of active firms, their unit labor cost and supply depend ...

The dynamic flash is a widely celebrated subject in the literature. It turns out to be also an excellent example for discussing issues around the representation and assumptions that are commonly made. Here we look into the representation and the conversion properties of a particular model using 2-film theory as a basis and suggest a more physical approach to solving the initialisation problem o...

Article history: Received 16 September 2011 Received in revised form 3 April 2012 Accepted 8 April 2012 Available online 25 April 2012

Abstract: We develop a constant-inventory tactical planning model for a generic manufacturing system, such as a job shop. The model is based on a discrete-time, continuous flow model developed by the first author. In the model, we assume that we can regulate the release of work to the shop to maintain the constant-inventory constraint. We characterize the conditions for which the shop productio...

Recent international agreements on tax data sharing aim to facilitate residence based taxation of capital and thus mitigate tax competition. I show that residence based capital tax rates can still decline with the number of financially integrated countries when public spending and debt are used strategically. While suboptimal in the steady state, strategic policies persist during transition if ...