We present a model checking procedure for the CSL until operator on the CTMCs that underly Jackson queueing networks. The key issue lies in the fact that the underlying CTMC is infinite in as many dimensions as there are queues in the JQN. We need to compute the transient state probabilities for all goal states and for all possible starting states. However, for these transient probabilities no ...

Rate-based congestion control is effective and still simple for traffic management in ATM networks. As one of practical realization schemes, Enhanced Proportional Rate Control Algorithm (EPRCA) has recently been proposed and adopted as a standard by the ATM Forum. While EPRCA can offer a desirable feature in steady state, the queue length considerably grows when the active number of connections...

Be they steady state or transient state, "Process simulators" can be split in two categories: simulators with a sequential modular approach and simulators with a global resolution approach. Both approaches are often opposed and present specific advantages and disadvantages. The work reported here consists in reconciling those two approaches. It was carried out in Ariane, a software dedicated to...

Interval availability is a dependability measure defined by the fraction of time during which a system is operational over a finite observation period. The computation of its distribution allows the user to ensure that the probability that its system will achieve a given availability level is high enough. The system is assumed to be modeled as a Markov process with countable state space. We pro...

The TCP window size process can be modeled as a piecewise-deterministic Markov process that increases linearly and experiences downward jumps at Poisson times. We present a transient analysis of this window size process. Our main result is the Laplace transform of the transient moments. Formulae for the integer and fractional moments are derived, as well as an explicit characterization of the s...

In this paper, a new concept on PI design for time delay systems is introduced. The concept is weighted geometrical center of the stabilizing controller parameters region. Calculating of the stabilizing control parameters region is based on plotting the stability boundary locus in the (kp, ki) plane and then computing stabilizing values of the parameters of a PI controller. The weighted geometr...

This paper deals with cooperative driving of automated vehicles on highways with data transmission based on inter-vehicle communications. It presents a data transmission algorithm in a platoon for a unidirectional medium and an omni-directional one under both a steady state and a transient state. The algorithm is featured by that the throughput rate is larger than a conventional system, when th...

Stochastic Timed Automata (STA) associate logical locations with continuous, generally distributed sojourn times. In this paper, we introduce Networks of Stochastic Timed Automata (NSTA), where the components interact with each other by message broadcasts. This results in an underlying stochastic process whose state is made of the vector of logical locations, the remaining sojourn times, and th...

In this paper, we study the consequences of an improvised nuclear detonation (IND) to the sub-transmission and distribution systems in Washington D.C. in the Eastern Interconnection (EI). We briefly discuss the geographical location of the blast and the interconnection of the power utility serving this area, with the neighboring power utilities. Analysis of the grid with respect to steady state...

Induction machine models used for steady-state and transient analysis require machine parameters that are usually considered design parameters or data. The knowledge of induction machine parameters is very important for Indirect Field Oriented Control (IFOC). A mismatched set of parameters will degrade the response of speed and torque control. This paper presents an improvement approach on roto...