In this paper, we present an approach to the design of hybrid systems by combination of several comprehensive formalization techniques. We use Duration Calculus (DC) to specify the requirement and design at abstract level of system development. Then the high level designs are further refined in control theory. A formal verification may be done either in DC if it is possible, or in predicate cal...

although control charts are very common to monitoring process changes, they usually do not indicate the real time of the changes. identifying the real time of the process changes is known as change-point estimation problem. there are a number of change point models in the literature however most of the existing approaches are dedicated to normal processes. in this paper we propose a novel appro...

We use a combination of three techniques for the specification of processes, data and time: CSP, Object-Z and Duration Calculus. Whereas the combination of CSP and Object-Z is well established by the work of C. Fischer [2, 3], the integration with Duration Calculus is new. The combination is used to specify parts of a novel case study on radio controlled railway crossings.

This paper applies duration calculus to the speciication and ver-iication of a complex robotics task: Fingers grasping an object. We present a model of the relevant features of the mechanical design and provide a speciication for sensors, actuators and a controller. Requirements are then speciied in an assumption commitment style, and it is checked through calculation that the design satisses t...

We use a combination of three techniques for the speciication of processes, data and time: CSP, Object-Z and Duration Calculus. Whereas the combination of CSP and Object-Z is well established by the work of C. Fischer 2, 3], the integration with Duration Calculus is new. The combination is used to specify parts of a novel case study on radio controlled railway crossings.

A repetitive petawatt-class Ti:sapphire laser system operating with high spatial and temporal beam quality is demonstrated. Maximum pulse energy of 30 J is obtained via five multi-pass amplification stages. Closed-loop feedback control systems in the temporal and spatial domains are used to yield Fourier-transform-limited pulse duration (33.7 fs), and diffraction-limited focal spot sizes (with ...

We present a new CuSum chart for monitoring shifts in the mean of autocorrelated data. The monitoring statistic is the plain cumulative sum of differences between the observations and the target value, and the control limits are a function of the asymptotic variance constant and target in-control average run length. Our method uses a variety of non-parametric techniques that are popular in the ...

Hybrid Communicating Sequential Processes (HCSP) extends CSP to include differential equations and interruptions. We feel comfortable in our experience with HCSP to model scenarios of the Level 3 of Chinese Train Control System (CTCS-3), and to define a formal semantics for Simulink. The Hoare style calculus of [5] proposes a calculus to verify HCSP processes. However it has an error with respe...

Distribution-free (nonparametric) control charts provide a robust alternative to a data analyst when there is lack of knowledge about the underlying distribution. A two-sided nonparametric Phase II exponentially weighted moving average (EWMA) control chart, based on the exceedance statistics (EWMA-EX), is proposed for detecting a shift in the location parameter of a continuous distribution. The...