SYSTEMS ENGINEERING FAQs
MATLAB, CPLEX and CORE FAQs
|SYSTEMS ENGINEERING FAQs|
Answer : Mail your homework to ITV Rm 2105, Engineering Classroom Building, University of Maryland, College Park, MD 20742. FAX : (301) - 314 - 9639. ITV will return the homeworks to you after they have been graded.
Answer : Rational Rose 4. You can download a demo copy of the Rational Software and build diagrams up to 30 classes. We also have the demo version installed on the PC in the SEIL Lab. Visio Professional (maybe .... we need to check this) See http://www.visio.com
|MATLAB, CPLEX AND CORE FAQs|
Answer : MATLAB can be accessed from anywhere on the Glue System (you do not need an ISR account to run MATLAB). First, type kiwi:~: tap matlab kiwi:~: MATLAB can be started by typing: kiwi:~: matlab < M A T L A B (R) > (c) Copyright 1984-98 The MathWorks, Inc. All Rights Reserved Version 184.108.40.20684 Jan 17 1998 To get started, type one of these: helpwin, helpdesk, or demo. For product information, type tour or visit www.mathworks.com. >> A small MATLAB 5 graphics window will appear for a few seconds, followed by the program announcement, and the MATLAB prompt. >> We are now ready to start solving problems.
Answer : MATLAB statements can be prepared with any editor, and stored in a file for later use. Such a file is referred to as a script, or an "m-file" (since they must have a name extension of the form filename.m). Writing m-files will enhance your problem solving productivity. Suppose that we create a program file myfile.m in the MATLAB language. The commands in this file can be exectued by simply giving the command myfile from MATLAB. The MATLAB statements will run like any other MATLAB function. You do not need to compile the program since MATLAB is an interpretative (not compiled) language.
Answer : The MATLAB Optimization Toolbox contains routines that implement the most widely used methods for performing minimization or maximization on general nonlinear functions. Additional routines are provided for linear programming, quadratic programming, nonlinear least squares, and solving nonlinear equations.
Answer : The MATLAB Optimization Toolbox contains routines that CPLEX is a tool for solving linear optimization problems, including constrained and unconstrained. Linear programming is used extensively in a wide variety of industries for solving mission-critical resource allocation problems. Examples include manufacturing scheduling, airline routing, raw material blending, financial portfolio optimization, personnel scheduling, and transportation logistics.
Answer : CPLEX is only available from the Systems Engineering Integration Laboratory (SEIL) within ISR. We have licenses for the following machines: watt.isr.umd.edu coulomb.isr.umd.edu kelvin.isr.umd.edu oxygen.isr.umd.edu Application forms for SEIL/ISR accounts are available from outside of the Open lab AVW 1146. After you have filled out the form (make sure you request access to "SEIL), ask Dr. Austin to sign it, and hand the completed form to Ms. Peggy Jayant in AVW, Rm. 1201. Your account will be activated within 3 working days.
Answer : After you have logged into one of the SEIL machines supporting CPLEX, type watt >> tap cplex4 and then watt >> cplex For help, just type "help" CPLEX> help add constraints to the problem change change the problem display display problem or solution enter enter a new problem help provide information on CPLEX commands netopt solve the problem using network method optimize solve the problem quit leave CPLEX read read problem or basis information from a file set set parameters tranopt solve the problem using the dual method write write problem or solution info. to a file xecute execute a command from the operating system Enter enough characters to uniquely identify commands and options: Commands may be executed in either of two formats: 1. Incremental entry. Enter the command name, and CPLEX will prompt you for additional required information. 2. Single-line Entry. CPLEX accepts single-line command strings, provided simple syntax rules are observed.
Answer : Within SEIL, CORE is installed on the following PC's: babbs, hagen, arnbach, garmisch Please send me e-mail (email@example.com) if you have any problems.
Answer : Here are some recommendations. Chapters 2,3 and 5 for an introduction to how CORE works Chapters 7, 8, and 9 for the system database management Chapters 11-17 for drawing different diagrams with CORE
Answer : Go to Rm 1400 in the Computer Science Services (CSS) building ... and follow the signs.
The Glue system operates under a "Pay-for-Print" policy. To print from a open glue lab, you will need a print account. This account can be used not only for the Glue Open labs, but also all over campus (WAM labs: PG2, Hornbake...). Each page costs $0.10. Users must obtain a Terrapin Express card in Room 1109 South Campus Dining Hall, in the hours 08:00 - 16:00. After doing this, they must get their print account activated in the Laser Print Cost Recovery (LPCR) office, Room 3326 Computer Science Center. The minimum deposit for the Terrapin Express Account is $25. Users can check their print account by telnetting to the address: bank.umd.edu The login id is "teller". The bank will then ask for the print account number and the password. The user can then move funds from the Terrapin Express account to the print account. For further help, please consult the first-aider on duty.
Answer : Students will need an ISR unix account in order to access the open lab. Pick up an account application form form just outside of Rm 1147 in AV Williams building. Follow the directions on the form: you first register at a workstation in one of the Open Labs, and then you hand the completed from to Ms. Peggy Jayant Office: AVW-1201, phone: 301 405 8018 or 301 405 6628, email:firstname.lastname@example.org. All administrative questions about ISR accounts are handled by Peg. More information on ISR's computing resources is located at http://www.isr.umd.edu/ISR/resources/FAQS/Computing_Facilities.html
Answer : Dial-up access to the College of Engineering's network of UNIX computers is provided through the Computer Science Center's (CSC) annex service. All dialup lines are set for 8 bits, 1 stop bit, and no parity. The modem pools that you can access are: (a) (301) 209-0700 -- X2 56kbps modems, 3hr session limit. 40 hrs per 14 days quota limit. (b) (301) 864-2087 -- 33 kbps modems. 15 min express service session limit. 40 hrs per 14 days quota limit. Access from Baltimore (c) (410) 962-8865 -- 28.8 kbps modems, 3hr session limit. (d) (410) 962-8867 -- 28.8 kbps modems, 15 min express session limit. WAM (Workstation at Maryland) accounts are available to all University of Maryland students from the Computer Science Center Consulting Lab (CSS 1400). Bring your University ID and current registration card. To dial in, you will need to connect to the computer or terminal you are using. Run your favorite communications program and set your communications port parameters to 8 bits, 1 stop bit, and no parity. vt100 is a good choice for the terminal type if you are not sure what to use. When the connection to the annex service is established, you will see the annex prompt. Issue the following command to initiate a login session: telnet <machine>.eng.umd.edu where <machine> should be replaced by the name of the workstation that you would like to log into. For example, the machines in the Open lab in Room 1442, A.V. Williams Bldg, are as follows: analog step harmonic noise convolution signal state periodic bandwidth digital gain feedback capacitance trace
Answer : First, try "netscape" and if that isn't available, try "mosaic"
Answer : Move the cursor to the location bar on your browser and enter the URL: http://www.isr.umd.edu/~austin/ense621.html
Answer : To save a file, click on the "File" item located in the top left-hand corner of the Netscape Browser. Then select the pull-down menu item that has a title "Save As..." A small window should pop-up requesting information on the location and format for the file containing the saved page. The three file formats are: Text -- Save the the text within the page. Source -- Save the html code for the page, including the text, tags etc.. Postscript -- This saves the file in Postscript format. Postscript is a special computer language understood by many printers, and is used to send text and graphics of all varieties to the printer. You can use this option to save an image of a web page as a Postscript file, which can then be sent to a Postscript printer to reproduce the file on paper.
Answer : The answer to this question will depend on the local configuration of your computer. Generally speaking you will need to give a command like qpr -q name-of-printer name-of-postscript-file.ps See the lab attendant for specific details.
Answer : "vi" and "pico". A summary of basic vi commands is located in the appendix to the class notes. For more information on vi, follow the links to Online Computer Documentation at Berkeley.
Answer : When you log into your Glue account, you are initially in your home directory. Typing: cd ../pub put you in your public directory. This is a directory that the general public has access to, and therefore this is where your home page should be stored. You should put your home page in a file Welcome.html located inside the pub directory. So if your login name is let's say "billclinton", then the location of your home page will be something like /afs/ ... /billclinton/pub/Welcome.html (The row of dots indicates that the file system will change from machine to machine) Folks from outside the University of Maryland will be able to view your home page using the URL http://www.glue.umd.edu/~billclinton/ More Information : Follow the link to "Instructions for Creating a Personal Home Page" from the Internet Resources section of the ENSE 621 home page.
Answer : You will need to write your home page in the Hypertext Markup Language (HTML). An easy-to-read introduction to HTML is "A Beginners Guide to HTML," located in section two of the Class Notes.
Answer : There are scanners in the engineering glue lab but they are kinda slow (and broken most of the time). The Construction Management Computer Lab (Rm 1156, Eng Classroom Bldg) also has a scanner, but the machines aren't connected to the Internet. You will need to save your results on a 3.5" floppy disk.
Answer : Here is a list of suggested content for your home page. Suggested Content ----------------- * Images of yourself (...or something similar ....). * A resume, containing career objective, educational background, (including schools attended), work experience, and a summary of your computer skills -- hey, you can list HTML as one of your Web skills. * A summary of classes taken at University of Maryland. * An e-mail link to your computer account. * Signposts that help a visitor navigate the layout of pages in your public_html directory -- one way of doing this is to add an index page to your home page. Where appropriate, your page should contain hypertext links to schools, places of of employment etc .... Also, because the purpose of your page is for self promotion, the page layout should tidy and "visually appealing." Learn how to create tables in html, and how to create pages with a good balance of "hot" and "cold" colors.
Answer : The File Transfer Protocol (FTP) program works on the same concept as the file manager as in Windows 3.1. To transfer files: 1. Save the file onto disk. Hard or floppy. 2. Click on the window icon FTP. This icon is usually pink letters on a white background. This icon will open up the "File Transfer Protocol" program. 3. Click on the space that says profile name. You will want to be able to get into glue with your login and password. One of the set ups in the drop list will allow you to do this. 4. Fill in your login where it says user id and password where it asks. 5. Click on OK 6. You will now see a split window. on the left hand side is the computer you are on, and on the right is your computer account. In order for you to put stuff(files, etc.) into your pub account you have to open up that part of your account. Look at the right part of the screen. In the upper right you will see something that looks like .. Click on the two dots. This will take you up a level in your account. 7. Now you should see another list of things. One should be pub. This is you pub account. Click on pub. If you have started your web site you should at least see Welcome.html here. You are now in the pub part ofyour account. 8. To transfer things there you now must look at the upper left of the window. Here you will see things that resemble the computer you are on. For instance [-a-], [-c-], are both drives. [-a-] is your floppy drive and [-c-] is your hard drive. If you have things saved on a floppy click on [-a-] and then you will see all the files that are on your disk. 9. Now highlight the thing you want to transfer by clicking on it. 10. Now that it is highlighted click on the right arrow and the program will transfer that file to your school account. 11. Your done. The file should now be on the right side bottom. If it is there, then it is in your pub account.
Answer : A good starting point is: http://home.netscape.com/assist/net_sites/bg/backgrounds.html For more sites, go to a search engine and do a search on "background pattern"
Answer : If you are running netscape on a PC, then you can simply move the cursor to the background, and click on the right button. A small window will appear asking where you want the background image to be saved. Otherwise, you can retrieve a background color pattern directly from the Netscape cache (the cache stores images and patterns locally on your computer, thereby enhancing performance). The cache can be accessed by typing about:cache in the "Location" window of Netscape.
Answer : Information on the University of Maryland's WWW counter service can be found at: http://death.cs.umd.edu:8080/counter/ Read the section on "usage policy," "registration" and look at the examples for required html. Also see http://www.digits.com
Answer : First, check your html code to make sure you haven't made a silly typo. The html should look something like: E-mail : <a href="mailto:email@example.com"><b> firstname.lastname@example.org </b></a> If your E-mail still doesn't work then perhaps your Netscape browser settings are incorrect. To check your mail preferences go to the Netscape Options menu and button on "Mail and News Preferences". Then select the services page. The SMTP (simple main transfer protocol) setting for outgoing mail should be smtp.glue.umd.edu for glue users, and smtp.isr.umd.edu for users at ISR.
Answer : A script file contains a copy of all of the commands given at the keyboard and all of the output sent to the computer screen. The syntax for starting a script file is: prompt >> script name-of-script-file ..... now go ahead and run your programs. A copy of the commands and program output will be echoed to file "name-of-script-file" The script file is terminated by typing prompt >> exit Now send the "name-of-script-file" file to the printer.
Answer: The ISR has a daemon running that automtically makes pdf files. To use it, you log into an isr machine, and ftp the postscript file that you wish to convert to your account. Then copy the file to the directory /software/isrwww/html/misc/tools/acrobat/IN Wait for a few minutes, and the postscript file that you copied should appear along with a pdf file in the directory /software/isrwww/html/misc/tools/acrobat/OUT Move the pdf file and the postscript file out of the OUT directory to the place in your own homespace where you want to put them.
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