this is a model of scheduling in 3G wireless technologies, such as CDMA2000 3GlxEV-DO downlink scheduling.) We intro- duce an algorithm which seeks to ...
computers in cars nearby may decide the best course of action to avoid ... The author is with the Department of Computer Science and Engineering, ... 2007; published online 31 Aug. ... suitability is explored for various conventional certificates.
A novel Realtime Time-domain EMI Measurement. System based on Field Programmable Gate Arrays. Stephan Braun, Mohammed Al-Qedra and Peter Russer.
Oct 7, 2011 - 1. Introduction. Wireless local area networks (WLANs) based on the IEEE ... the probability distribution of the MAC layer packet service time, but ...
ABSTRACT - Much attention has been focused recently on FACTS (Flexible AC Transmission. System) devices. Among these devices, the. STATCOM (STA Tic ...
OMAGNETIC RADIATION FROM DIGITAL ELECTRONIC SYSTEMS BY MEANS. OF THE FINITE ... experience with a wide variety of electromagnetic modelling.
and John M. Reid, Life Fellow, IEEE. AbstractâThis paper presents a complete PSpice model of an ultrasound single-element transducer, including elec-.
Software Systems Research Centre ... Traditionally, business process management systems ... process management (BPM) in terms of computational infras-.
enterprises business processes of established Extended. Enterprise for Supply Chain, focusing in the modeling of collaborative decisional model. The study has ...
E|-|3|;||i|-|g I A-CDM I Arrival Manager I A-CDM I A-CDM I A-CDM concepts implementa- {AMAN] I Departure Manager {DMAN} I Departure Manager implementa-.
Capture Effect in IEEE 802.15.4 Networks: Modelling and Experimentation. Cengiz Gezer #1, Chiara Buratti #2, Roberto Verdone #3. # WiLab - DEIS, University ...
Bowen Hua, Student Member, IEEE, Zhaohong Bie, Senior Member, IEEE, Cong Liu, ... C. Liu is with Argonne National Laboratory, Lemont, IL 60439 USA.
High-Voltage Constraints for Vacuum. Packaged Microstructures. Chester G. Wilson, Member, IEEE, Yogesh B. Gianchandani, Member, IEEE, and Amy E.
AbstractâSecurity constrained unit commitment (SCUC) is one of the most important daily tasks that independent system oper- ators (ISOs) or regional ...
AbstractâFor linear systems, the original Kalman filter under the minimum mean square error (MMSE) criterion is an optimal filter under a Gaussian assumption.
Abstractâ The satisfaction of constraints between the feet and the ground is important during balance control of bipedal standing. In this work, the effects of such ...
CENELEC). One common measure of exposure is called specific absorption rate (SAR). SAR, typically measured in Watts per kilogram, is a measure of the rate ...
This article studies a new circuit acyclic clustering problem which divides a combinational circuit into groups of sub-circuits, each of which has limited numbers of ...
Paul W. Davis. Karen D. Rey. Worcester Polytechnic Institute. Worcester, MA 01609. Abstract A new formulation of the power system state estimation problem ...
Gilbert Verghese and John K. Tsotsos email: [email protected]. Department of Computer Science, University of Toronto, Toronto, CANADA MSS 1A4.
Jun 14, 2011 - Page 1. Page 2. Realtime Apache Hadoop at Facebook. Jonathan Gray & Dhruba ... Messages email. IM/Cha
Jun 14, 2011 - Bulk importing ... SMS. Messages email. IM/Chat. The New Facebook Messages ... message, SMS, and e-mailSe
Dao Hua Zhang (M'93âSM'97) received the M.S. degree from Shandong University, ... Geok Ing Ng received the Ph.D. degree in electrical engineering from the ...
prototiping tool for rej-time iystem protot ping +he system is composed of a ... A real-time system is required to monitor and control the temperature of a piece of ...
MODELLING REAL-TIME CONSTRAINTS
SJ. Bextyman and I. Sommerville Lancaster University, UK
ABSTRACT The obiective of the work described here is to Drovide a softwak tool to, assist real-time system specifiers and designers ta predict, at an early sta e of the develo men1 DKIC~SS, the timing behaviour of e! system d e v e h e d . Our tool fSimulatioi of Real-time svstems-fSRT)) is usid to model thk timing aspects of a red-time iystem and then simulate the system to predict its behaviour.
I " A real-time system is expected to interact with the environment within certain timing constraints and the software desinners must nroduce a svstem which can guarantee to xiieet these cohstraints A'realistic real-tme system will be composed of many interacting modules which could bc executed with real or virtual concurrency Real concurrency means each module executine on its o&n
Our tool SRT (Simulation of Real-time systems allows a
model of a real-ttme system to be copstructed'and then evaluated by simulatton. The constructton of the model IS achieved by using a raphical user interface (Figure 1). Icons from the,controf panel are copied onto the desi n anel and then oined together with lines $at represent tie Zatabuses. Each icon has a number of attnbutes which can be specified by selecting the form option on the icon menu.
This paper presents an overview of the system which is implemented using Smalltalk-80 an object-oriented programming language The Ian uaie was chosen because of its rapid prototy'ing abijty, thus ideas can be implemented and t e s d v e r y quickly.
The paper is split into five sections. The first section looks at current tools and methods f o r , modelling timin constraints. The second and third sections exDlain a rea! time s stem whose timing characteristics can be modelled using JRT. The fourth section describes how SRT evaluates the model constructed in the Drevious two sections and analyses the output data. The fifth section looks at future versions of the tool and draws some conclusions about our work. There are various tools and methods for prototyping formallv specifying and imnlementing real-time systems: This section looks-briefly i t each ar
