NetNews Usenet Archive 1992 #20/NN_1992_20.iso/spool/comp/simulati/57

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Path: sparky!uunet!caen!uflorida!simulation
From: [e-mail] (Moderator: Paul Fishwick)
Newsgroups: comp.simulation
Subject: SIMULATION DIGEST V29 N2
Message-ID: <[e-mail]>
Date: 3 Sep 92 13:35:10 GMT
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Volume: 29, Issue: 2, Thu Sep  3 09:34:39 EDT 1992

+----------------+
| TODAY'S TOPICS |
+----------------+


[GENERAL INFORMATION]
  Simpack and Simpack++ Tools
[NEW QUESTIONS]
  Simulating with DYNAMO
  COMNET for Testing Routing Schemes
  Simpack and Other Utilitites
  Ion Interaction
[REGARDING PAST QUESTIONS]
  QASE Location
[PUBLICATIONS]
  Verification and Validation of Models
  Simulation: A Statistical Perspective
  Sample Size Determination
[CALL FOR PAPERS/PARTICIPATION]
  IC Technology, Systems and Applications

* Moderator: Paul Fishwick, Univ. of Florida
* Send topical mail to: [e-mail] OR
  post to comp.simulation via USENET
* Archives available via FTP to bikini.cis.ufl.edu (128.227.224.1).
  Login as 'anonymous', use your e-mail address as the password, change
  directory to pub/simdigest. Do 'binary' before any file transfers.
* Simulation Tools available by doing above and changing the
  directory to pub/simdigest/tools.




-----------------------------------------------------------------------------

Subject: [GENERAL INFORMATION]


------------------------------


Date: Wed, 2 Sep 92 10:40:44 -0400
From: "Paul Fishwick" <fishwick>
To: [e-mail]
Subject: Simpack and Simpack++
Cc: fishwick@fish

Simpack and Simpack++ are sets of simulation tools written in
C and C++. A paper describing the Simpack toolkit is available for
anonymous ftp from bikini.cis.ufl.edu (cd to cis/tech-reports/tr92,
specify 'binary' and get tr92-022.ps.Z). It is a compressed Postscript
file.

Simpack Version 2.0 is now available for anonymous ftp from
bikini.cis.ufl.edu (cd to pub/simdigest/tools, specify 'binary'
and get simpack-2.0.tar.Z). Read the file VERSION2 to see
the enhancements over version 1.0.

Also, Simpack++ contains a C++ class library for using the queuing
routines. Also, the 'slice' program was converted to C++ (get
simpack-2.0++.tar.Z)

If you use Simpack, and would like to be informed when additions
or changes are made, please send me your e-mail address, and I
will place you on a mailing list.

 --------info---------

                       S I M P A C K
           C-based Simulation "Seed" Tool Package
        Copyright 1990,1991,1992,  Paul A. Fishwick

                        VERSION 2.0
                      (June 1, 1992)

  SimPack is a collection of C tools (routines and programs) for
computer simulation. The purpose of SimPack is to provide people
with a "starting point" for simulating a system. The intention
is that people will view what exists as a template (or "seed")
and then "grow a simulation program." SimPack tools have been
used for two years of teaching computer simulation at the under-
graduate (senior) and graduate levels. Also, many people have taken
the basic tools and created more complex research applications with
lots of options specific to a particular area.

...SimPack is copyright, and re-distribution is granted so long...
...as SimPack is not sold for a profit. Users of SimPack use the..
...tools at their own risk.                                    ...

 -------------------------------------------------------------------
INSTALL: To install, just type 'make' after unpacking all
directories and sub-directories.

DOCUMENTATION: The documentation is located within README files
within each sub-directory.

CONTENTS:

1. combined: Combined modeling
   1.1 combined: discrete event and continuous
       "Simulation of a cashier with a moving belt for groceries"
   1.2 combined2: difference and differential equations
       "Delay differential equation x' = a*x(t-1)"
2. dec: Declarative modeling
   2.1 fsa: finite state automata with timed states
   2.2 markov: Markov model with timed states
   2.3 pulse: Pulse process
3. equation: Equational modeling
   3.1 difference : Difference equation modeling
       3.1.1 log1: Logistic equation (first order)
       3.1.2 log2: Logistic equation (second order)
       3.1.3 diff1: Circular queue simulation method on log1
       3.1.4 bifurc: Bifurcation analysis on log1
   3.2 differential: Differential equation modeling
       3.2.1 deq: Equation parser and solver
       3.2.2 integrate: Sample Euler and RK4 integrations
4. func: Functional modeling
   4.1 XSimCode: X window interactive queuing network simulator
   4.2 clock: discrete event model of a clock
   4.3 cpudisk: 1CPU/4Disk discrete event simulation
       (note: simpack++ contains a C++ version of this program)
   4.4 gas: two methods of simulating gas/molecule dynamics
   4.5 logic: digital logic simulator with nominal gate delays
   4.6 network: communications network simulator
   4.7 petri: timed petri net simulator
   4.8 qnet: general queuing network simulator
   4.9 slice: block simulator (ala CSMP)
       (note: simpack++ contains a C++ version of this program)
   4.10 ssq: single server queue simulation with graphical tracing
       (note: simpack++ contains a C++ version of this program)
5. minigpss: Mini GPSS compiler (small subset of GPSS)
6. queuing: Queuing library (contains all routines for queuing)
    (note: simpack++ contains the C++ queuing library).


NOTE: There are 2 loader errors that occur when compiling and
      linking the XSIMCODE program. I have been told by my systems
      staff that the two unresolved references will not be called),
      and so there should not be a problem running it. Apparently,
      the problem is universal to those using MIT X windows.


+-------------------------------------------------------------------------+
| Paul A. Fishwick                                                        |
| Computer Simulation and Animation Group                                 |
| Dept. of Computer Science            EMAIL: [e-mail]        |
| University of Florida                PHONE: [phone]              |
| Bldg. CSE, Room 301                  FAX:   [phone]              |
| Gainesville, FL 32611                UUCP:  gatech!uflorida!fishwick    |
+-------------------------------------------------------------------------+







------------------------------


Subject: [NEW QUESTIONS]


------------------------------


Newsgroups: comp.simulation
Path: news
From: [e-mail] (Nino Pagliccia)
Subject: DYNAMO
Keywords: DINAMO
Sender: [e-mail] (Usenet News Maintenance)
Nntp-Posting-Host: spanish.chspr.ubc.ca
Reply-To: [e-mail]
Organization: Centre for Health Services & Policy Res.
Date: Tue, 1 Sep 1992 21:56:24 GMT

I am planning to get DYNAMO for PC. I will have to learn
the language to simulate a model of human resources. Can
anybody tell me how easily DYNAMO can be used, its advantages
and limitations, etc, etc. I get a sense that DYNAMO is not
widely used; are there DYNAMO fans?

Any information is appreciated.

Nino


------------------------------

Date: Tue, 1 Sep 92 23:41:17 -0400
From: [e-mail] (Dennis Lee)
To: [e-mail]
Subject: COMNET II.5 inquiry

hello netters,
    i am wondering if anyone out there has experience with using
    COMNET II.5, a software simulation package by CACI.  In
    particular, I am curious as to its relevance to simulating
    routing schemes like: regular neighbor-table routing, flooding,
    and if i can add optimizing features to flooding (like make
    a node remember a buffer of recent packets so it won't retransmit
    unnecessarily and clog the network) easily with this package.

    All this is to be done in a packet radio network.

    i would also be interested in knowing if there are other better
    simulation packages that does the above mentioned job better.

    thanks.

=================================================================
|    Dennis Lee                        |
|    University of Maryland at College Park Alumni        |
|    Internet: [e-mail]                |
|    Bitnet: DENNISLEE@ITIVAX                |
=================================================================



------------------------------

From [e-mail] Wed Sep  2 09:14:41 1992
Subject: Simpack use and other simulation software
To: [e-mail] (Dr. Paul A. Fishwick)
Date: Wed, 2 Sep 92 8:12:06 CDT
From: Larry Bell <[e-mail]>
X-Mailer: ELM [version 2.3 PL1]

I am responsible for computer performance evaluation and
monitoring for Southwestern Bell Telephone in St. Louis.
Recently I got a copy of Simpack and got it to compile.
(I am more of a user rather than a system administrator
so the subtleties of unix-ese sometimes baffles me).

We would be interested in exchanging ideas with others who
are using Simpack to develop computer or network performance
models.  Within a week or so this system will again have
Usenet access.
  Also, what are some current commercial packages for
modeling in the PC environment.   I am aware of SLAM-II,
marketed by Pritsker Associates and would like to compare
others with it.
  Thanks in advance.
Larry M. Bell

(By the way, my machine, neuman 132.201.4.175 , may not
be in our nameserver, so to return mail to me you may have
to insert an entry into your /etc/hosts file.)


------------------------------

Date: Wed, 2 Sep 92 21:39:15 -0500
From: [e-mail] (USENET News)
To: [e-mail]
Path: mace.cc.purdue.edu!vbl
From: [e-mail] (Randall Julian)
Subject: N-Body Simulations
Keywords: simulation, multiparticle
Sender: [e-mail] (USENET News)
Organization: Purdue University
Distribution: na
Date: Thu, 3 Sep 1992 02:39:10 GMT


I haven't read this group much but the last two digests (v28n9 and 10)
had a question about N-body simulations.  I am working on a model of
an ion trap which tracks the trajectory of 16K ions.  It has been
ported to the Connection Machine C*, but currently ions do not interact.

To add ion-ion interaction seems like an N-body problem.  Are there
standard references on this ?  So far this has been a big electrostatics
problem with a bit of numerical integration mixed in, so I haven't
though much about N-body work.  However a Thinking Machines consultant
suggested that 16K particles is now considered on the low end for
some.  I would be interested in hearing from anyone with experience
in this area.

Randy Julian, Dept. of Chemistry, Purdue University
[e-mail]
[phone]



------------------------------


Subject: [REGARDING PAST QUESTIONS]


------------------------------


Date: Tue, 1 Sep 92 15:09:56 MDT
From: [e-mail] (Randy Stafford)
To: [e-mail]
Subject: Re: SIMULATION DIGEST V29 N1

In regard to the question about the company that produces QASE:

Advanced System Technologies, Inc.
12200 E. Briarwood Ave., Suite 260
Englewood, CO 80112
[phone]

 --
|===========================================================================|
| from:  Randy Stafford               |  Martin Marietta Astronautics Group |
| mail:  [e-mail]   |  Denver, Colorado                   |
| voice: [phone]               |  The foregoing opinions are mine    |
| fax:   [phone]               |  and not necessarily my employer's. |
|---------------------------------------------------------------------------|
| Words dissemble, words be quick, words resemble walking sticks.           |
| Plant them and they will grow; watch them waver so.                       |
| I'll always be a word man - better than a bird man.        --Jim Morrison |
|===========================================================================|



------------------------------


Subject: [PUBLICATIONS]


------------------------------


Date: Thu, 3 Sep 1992 11:25 +0100
From: "Jack Kleijnen, Tilburg, Netherlands" <[e-mail]>
Subject: abstract "Two-stage versus sequential..."
To: [e-mail]
X-Envelope-To: [e-mail]
X-Vms-To: IN%"[e-mail]"
X-Vms-Cc: KLEIJNEN
Comments: This message was sent with PMDF 4.0


Verification and validation of simulation models

Jack P.C. Kleijnen
Department of Information Systems and Auditing, Katholieke
Universiteit Brabant (Tilburg University), P.O. Box 90153,
5000 LE Tilburg, Netherlands.

This paper surveys many issues in the verification and valida-
tion of models, especially simulation models in operations
research. For verification it discusses (a) checking of inter-
mediate simulation outputs through tracing and statistical
testing per module, (b) comparing final simulation outputs
with analytical results, using statistical tests, (c) animati-
on, and (d) general good programming practice. For validation
it discusses (a) obtaining real-world data for trace driven
simulation, which may be scarce or abundant, (b) some simple
tests for comparing simulated and real data, such as graphi-
cal, Schruben-Turing, and t tests and, (c) a new statistical
procedure, based on regression analysis, for testing whether
simulated and real responses are positively correlated, (d)
sensitivity and risk analyses, (e) system dynamics type of
simulation, (f) relationships between simulation and other
types of models, including white and black box models, (g)
Documentation and credibility assessment. Finally 37 referen-
ces are given for further study.

Keywords: simulation, statistics, time series, philosophy,
practice.



------------------------------

Date: Thu, 3 Sep 1992 11:24 +0100
From: "Jack Kleijnen, Tilburg, Netherlands" <[e-mail]>
Subject: new book info
To: [e-mail]
X-Envelope-To: [e-mail]
X-Vms-To: IN%"[e-mail]"
X-Vms-Cc: KLEIJNEN
Comments: This message was sent with PMDF 4.0

New Book Information

"Simulation: A Statistical Perspective" by

Jack P. Kleijnen and Willem v. Groenendaal, Tilburg University, The Netherlands

This text is aimed at those readers who wish to acquire a basic knowledge of
simulation. The authors combine simulation theory and statistical theory with
practical applications to show how certain problems in the areas of management
science, operations research, economics, business administration and mathemati-
cal statistics can be analysed by means of simulation. By explaining how to
analyse simulation results, it also shows how to arrive at more general
conclusions when using simulation. The efficient design of simulation experim-
ents is also discussed.

The book includes examples and definitions of simulation, an introduction to
Forrester's Industrial Dynamics or System Dynamics and the evaluation of
pseudorandom number generation. It also discusses the application of simulation
in mathematical statistics and operational research, with particular reference
to inventory and queuing systems. Experiments using statistical designs are
analysed through ANOVA, and information on the verification and validation of
models is supplied.

CONTENTS:
 -           Introduction
 -           Random Numbers
 -           Sampling from Non-Uniform Distributions
 -           Economic and Corporate Models
 -           Operations Research Models
 -           Simulation Software
 -           Statistical Applications
 -           Regression Metamodels
 -           Experimental Design
 -           Tactical Aspects
 -           Verification and Validation
 -           Epilogue
 -           Solution to Exercises
 -           Author Index
 -           Subject Index

            0471 93055 5 (paperback) 280pp Augustus 1992
16.50/$35.10


-------------------------------------------------------------------------------------------------------------

ORDER FORM

Please send me ____ copy(ies) of: You may telephone our Customer
Service Dept with

your order by dialling LINKLINE 0800243407 (UK only) or 0243 829121
KLEIJNEN & VAN GROENENDAAL/SIMULATION (paperback) (ouside UK)

Please add 1.95/$4.95 postage charge for orders. Multiple orders We
will refund your payment without question if you return any single
POSTAGE FREE unwanted book to us in a re-saleable condition within 30
days.


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Return to: Tiffany Robinson, John Wiley & Sons
   companies Ltd, Baffins Lane, Chichester, West Sussex PO19 1UD,
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Fax: [phone] REGISTERED NO: 641132 ENGLAND



------------------------------

Date: Thu, 3 Sep 1992 11:26 +0100
From: "Jack Kleijnen, Tilburg, Netherlands" <[e-mail]>
Subject: abstract "Verification and validation..."
To: [e-mail]
X-Envelope-To: [e-mail]
X-Vms-To: IN%"[e-mail]"
X-Vms-Cc: KLEIJNEN
Comments: This message was sent with PMDF 4.0

The follwing paper may be requested from the author: TWO-STAGE VERSUS
SEQUENTIAL SAMPLE-SIZE DETERMINATION IN REGRESSION ANALYSIS OF
SIMULATION EXPERIMENTS

by JACK P.C. KLEIJNEN and WILLEM VAN GROENENDAAL

                 Katholieke Universiteit Brabant (Tilburg University)
                          School of Management and Economics
                    Department of Information Systems and Auditing
                             5000 LE Tilburg, Netherlands

In practice, simulation models usually have responses with variances
that vary with the inputs, that is, the variances are not constant.
Then the number of observations (also called simulation runs or
replications) per combination of simulation inputs can be selected
such that the variances of the average simulation responses become
(approximately) equal; in other words, combinations with high
variability are replicated more often. These average responses can be
analyzed through a regression metamodel. To estimate the regression
parameters (or simulation input effects), Weighted Least Squares (WLS)
can be applied. WLS becomes identical to Ordinary Least Squares (OLS)
applied to the average simulation responses. Because the response
variances are unknown, they are estimated by repeating the simulation
runs with different random numbers. The estimated response variances
yield the number of runs required to obtain approximately equal
variances per average simulation response. Two rules for selecting the
required number of simulation runs are presented, namely a two-stage
and a sequential rule. The rules are first formalized and analyzed,
and then evaluated through a Monte Carlo experiment. Both procedures
turn out to yield confidence intervals for the estimated regression
parameters that have acceptable coverage probabilities. The sequential
rule demands more complicated computations to select the number of
simulation runs, but this rule saves runs.

(Key Words: EXPERIMENTAL DESIGN; METAMODEL; PILOT SAMPLE; STEIN
ESTIMATOR; ITERATIVE PROCEDURE; STOPPING RULE)




------------------------------


Subject: [CALL FOR PAPERS/PARTICIPATION]


------------------------------


Newsgroups: comp.simulation
Path: ntuvax.ntu.ac.sg!elsiek
From: [e-mail]
Subject: First Call for Paper ---- ISIC-93
Sender: [e-mail] (USENET News System)
Nntp-Posting-Host: v8802.ntu.ac.sg
Organization: Nanyang Technological University - Singapore
Date: Thu, 3 Sep 1992 07:45:10 GMT
Apparently-To: [e-mail]


                        FIRST CALL FOR PAPERS


**************************************************************************
*                               ISIC-93                                  *
* Fifth International Symposium on IC Technology, Systems & Applications *
*                        15-17 September 1993                            *
*                              SINGAPORE                                 *
**************************************************************************

Organized by:
School of Electrical & Electronic Engineering
Nanyang Technological University, Singapore
co-sponsored by:
IEEE Singapore Section
Institute of Microelectronics, Singapore



The fifth International Symposium on IC Technology, Systems and Applications,
ISIC-93 will be held on the 15-17th September 1993.  This symposium will
provide a forum for VLSI designers and manufacturing engineers as well as
academics to present and share new research and development results, techniques
and problems. Tutorial sessions on topics of current interest by eminent
speakers are planned on the first day of the symposium.  In addition, an
industrial exhibition will be held in conjunction with regular sessions for
paper presentations on the second and third day.  Suggested topics include,
but are not limited to the following:

A.    VLSI TECHNOLOGY
    - Submicron Technology
    - GaAs Devices
    - Testing
    - Yield enhancement
    - Process Simulation
    - Device Physics and Modelling
    - New process and Materials
    - Reliability and Quality Control
    - Failure Mechanisms
    - Assembly and Packaging

B.    INTEGRATED CIRCUITS AND SYSTEMS
    - Artificial Neural Networks
    - Fault-Tolerant Circuits
    - ASIC
    - Full Custom Design
    - Timing, Synchronization & Communication
    - Novel Circuits & Innovative Designs
    - Parallel & Concurrent Architectures
    - IC Sensors
    - Switched Capacitor Circuits
    - Current Mode Circuits

C.     DESIGN AUTOMATION
    - Silicon Compilation
    - Logic Synthesis
    - Testability
    - Verification
    - Simulation
    - Performance Optimization Methods
    - AI Methodology

D.    APPLICATIONS
    - Audio, Electroacoustic & Video
    - Military Applications
    - Cellular Mobile Communications
    - Switched Power Supplies

E.    SIGNAL PROCESSING
    - Speech Processing
    - Image Processing
    - Multi-Dimensional Signal Processing
    - Underwater Acoustic Signal Processing
    - Adaptive and Nonlinear Filtering

F.    SPECIAL TOPICS
    - Technology Management
    - Emerging Technologies
    - Education

TUTORIAL SESSIONS

The first day of the conference will be devoted to lectures by invited
speakers.  The organizing committee invites suggestions tutorial topics.
Participants who wish to contribute by giving lectures for the tutorial
sessions may submit proposals to the organizing committee.  Proposed
lecture topics of sufficent interest among the delegates will be considered
for the tutorials.

EXHIBITIONS

An industrial exhibition of relevant equipment and systems from suppliers
and companies will be held in conjunction with the regular sessions for
paper presentations on the second and third day of the conference.

SUBMISSION OF PAPERS

Authors are invited to submit a 500-word synopsis of the paper for
consideration to reach the organizing committee by 31 January 1993.
Notification of acceptance will be sent by 28 February 1993 and
submission  of photo-ready paper by the authors must br received by
30 April 1993.

Send synopsis and suggestions to:

Ms Annabel Ooi
Centre for Continuing Education
Nanyang Technological University
Nanyang Avenue
Republic of Singapore 2263
E-mail: [e-mail]
Fax: [phone]  Tel: [phone]

International Advisory Committee (as at August 1992)
Dr B. Chen, Institute of Microelectronics, Singapore
Dr P. Chin Sim Moo, IEEE Singapore Section, Singapore
Prof A.P. Dorey, Lancaster University, UK
Prof R. Gang, Fudan University, Shanghai, China
Mr T. Kogure, Asia Matsushita Electric Pte Ltd, Singapore
Prof J.B. Kuo, National Taiwan University, Taiwan, China
Prof B. Lee, Nanyang Technological University, Singapore
Prof M.S. Sze, National Chiao Tung University, Taiwan, China
Prof Y. Takefuji, Case Western Reserve University, USA
Dr K. Wiemer, Chartered Semiconductor Manufacturing Pte Ltd, Singapore
Prof C.Y. Wu, National Chiao Tung University, Taiwan, China

Conference organizing committee
Tan Hong Siang        - General Chairman
Do Manh Anh        - Secretary
Alvarez-Tinoco A M    - Secretary
Ooi Tian Hock        - Logistic
Tan Ooi Kiang        - Technical Programmes
Siek Liter        - Publications & Publicity
Tan Han Ngee        - Finance




------------------------------




END OF SIMULATION DIGEST
************************