evaluating alternatives for requirements environment and implementation
slike bài giảng ứng dụng xây dựng hệ thống thông tin chương 8 evaluating alternatives for requirements, environment, and implementation
Ngày tải lên :
24/10/2014, 15:36
... Distributed software standard 12 Existing Processing Environment at RMO 13 Processing Environment Alternatives 14 Strategic Directions for RMO 15 Choosing Implementation Alternatives Variations ... systems requirements Generate and evaluate alternatives Review recommendation with management Refocus project direction Transition from discovery and analysis to solutions and design Set direction for ... General requirements Technical requirements Functional requirements 18 Partial Matrix of General Requirements 19 Partial Matrix of Functional Requirements 20 Partial Matrix of Technical Requirements...
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A computer system consists of hardware, system programs, and application programs figs 1
Ngày tải lên :
28/04/2014, 16:35
... to handler (a) Interrupt handler (b) Fig 1-10 (a) The steps in starting an I/O device and getting an interrupt (b) Interrupt processing involves taking the interrupt, running the interrupt handler, ... screen */ read command(command, parameters); /* read input from terminal */ if (fork( ) != 0) { /* fork off child process */ /* Parent code */ waitpid(−1, &status, 0); /* wait for child to exit */ ... (e) Operator carries output tape to 1401 (f) 1401 prints output $END Data for program $RUN $LOAD Fortran program $FORTRAN $JOB, 10,6610802, MARVIN TANENBAUM Fig 1-3 Structure of a typical FMS...
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A computer system consists of hardware, system programs, and application programs figs 2
Ngày tải lên :
28/04/2014, 16:35
... ); take fork(i); take fork((i+1) % N); eat( ); put fork(i); put fork((i+1) % N); } } /* i: philosopher number, from to */ /* philosopher is thinking */ /* take left fork */ /* take right fork; ... 2-8 Each thread has its own stack Four score and seven years ago, our fathers brought forth upon this continent a new nation: conceived in liberty, and dedicated to the proposition that all men ... can never forget what they did here It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced It is rather for us to...
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A computer system consists of hardware, system programs, and application programs figs 3
Ngày tải lên :
28/04/2014, 16:35
... (m) (n) A B C A B C A B C R S T R S T R S T (o) (p) (q) Fig 3-4 An example of how deadlock occurs and how it can be avoided R A B C S D F U W G (a) T E D V U R E V G (b) Fig 3-5 (a) A resource ... Sc rs an ne C D rs R om s s ive dr Pl e Ta p E=(4 0) Request matrix R= 0 1 0 Fig 3-7 An example for the deadlock detection algorithm ;; ;; ; B Printer u (Both processes finished) I8 I7 I6 t Plotter ... Fig 3-13 (a) Numerically ordered resources (b) A resource graph Condition Mutual exclusion Hold and wait No preemption Circular wait Approach Spool everything Request all resources initially Take...
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A computer system consists of hardware, system programs, and application programs figs 4
Ngày tải lên :
28/04/2014, 16:35
... come into memory and leave it The shaded regions are unused memory B-Stack Room for growth Room for growth ;; ;; ; B-Data B Actually in use B-Program A-Stack Room for growth Room for growth A-Data ... 2, 3, 2, 1, 0, 3, 2, R bits for pages 0-5, clock tick R bits for pages 0-5, clock tick R bits for pages 0-5, clock tick R bits for pages 0-5, clock tick R bits for pages 0-5, clock tick 1 1 ... 28.2 31.7 (c) Fig 4-4 (a) Arrival and work requirements of four jobs (b) CPU utilization for to jobs with 80 percent I/O wait (c) Sequence of events as jobs arrive and finish The numbers above the...
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A computer system consists of hardware, system programs, and application programs figs 5
Ngày tải lên :
28/04/2014, 16:35
... reality all communication between drivers and device controllers goes over the bus Uniform interfacing for device drivers Buffering Error reporting Allocating and releasing dedicated devices Providing ... memory space (b) Memory-mapped I/O (c) Hybrid CPU reads and writes of memory go over this high-bandwidth bus CPU Memory All addresses (memory and I/O) go here (a) I/O CPU Memory I/O This memory port ... Central buffer pool Terminal Terminal Buffer area for terminal Buffer area for terminal (a) (b) Fig 5-35 (a) Central buffer pool (b) Dedicated buffer for each terminal Character CTRL-H CTRL-U CTRL-V...
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A computer system consists of hardware, system programs, and application programs figs 6
Ngày tải lên :
28/04/2014, 16:35
... files; for system file for has been backed up; for needs to be backed up for ASCII file; for binary file for sequential access only; for random access for normal; for delete file on process exit for ... the file and in what way Password needed to access the file ID of the person who created the file Current owner for read/write; for read only for normal; for not display in listings for normal ... Interchange Format image Help file World Wide Web HyperText Markup Language document Still picture encoded with the JPEG standard Music encoded in MPEG layer audio format Movie encoded with the MPEG standard...
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A computer system consists of hardware, system programs, and application programs figs 7
Ngày tải lên :
28/04/2014, 16:35
... rates for multimedia and high-performance I/O devices Note that Mbps is 106 bits/sec but GB is 230 bytes Frame English subtitles Hello, Bob Hello, Alice Nice day Sure is How are you Great And ... are transmitted Fig 7-10 Three consecutive video frames Deadline for A1 Starting moment for A1, B1, C1 Deadline for B1 Deadline for C1 A A1 B A2 A3 B1 B2 C C1 A4 B3 20 30 40 50 B4 C3 C2 10 A5 ... 7-11 Three periodic processes, each displaying a movie The frame rates and processing requirements per frame are different for each movie A A2 A1 B A3 B1 A4 B2 B3 C3 RMS A1 B1 C1 A2 B2 C2 A3 EDF...
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A computer system consists of hardware, system programs, and application programs figs 8
Ngày tải lên :
28/04/2014, 16:35
... master-slave multiprocessor model I/O CPU CPU CPU CPU Runs users and shared OS Runs users and shared OS Runs users and shared OS Runs users and shared OS I/O Memory OS Locks Bus Fig 8-9 The SMP multiprocessor ... (a) I’m bored (b) Fig 8-26 (a) An overloaded node looking for a lightly loaded node to hand off processes to (b) An empty node looking for work to ? Item Node configuration Node peripherals Location ... references page 10 (c) Situation if page 10 is read only and replication is used CPU Shared page CPU A B A B Code using variable A A and B are unrelated shared variables that just happen to...
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A computer system consists of hardware, system programs, and application programs figs 9
Ngày tải lên :
28/04/2014, 16:35
... integrity Exportation of labeled information Labeling human readable output Mandatory access control Subject sensitivity labels Device labels Accountability Identification and authentication Audit Trusted ... #include struct stat sbuf; /* for lstat call to see if file is sym link */ search(char *dir name) { DIR *dirp; struct dirent *dp; /* recursively search for executables */ /* pointer to an ... to a directory entry */ } /* standard POSIX headers */ dirp = opendir(dir name); /* open this directory */ if (dirp == NULL) return; /* dir could not be opened; forget it */ while (TRUE) { dp...
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A computer system consists of hardware, system programs, and application programs figs 10
Ngày tải lên :
28/04/2014, 16:35
... write, and execute Owner and group can read, write, and execute Owner can read and write; group can read Owner can read and write; all others can read Owner can everything, rest can read and execute ... prompt on the screen */ read command(command, params); /* read input line from keyboard */ pid = fork( ); if (pid < 0) { printf("Unable to fork0); continue; } /* fork off a child process */ /* ... gets own PID Highest priority -4 Waiting for disk I/O -3 Waiting for disk buffer -2 Waiting for terminal input -1 Waiting for terminal output Waiting for child to exist User priority User priority...
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A computer system consists of hardware, system programs, and application programs figs 11
Ngày tải lên :
28/04/2014, 16:35
... description and mapping of hardware to drivers Security and account information for users System-wide security policies Generic information about installed application programs Information for booting ... destroy, and append to menus and menu bars Pop up a dialog box and collect information Display points, lines, and geometric figures Display text in some font, size, and color Placement of bitmaps and ... Process A's private code and data Process B's private code and data Process C's private code and data GB GB Bottom and top 64 KB are invalid Fig 11-23 Virtual address space layout for three user processes...
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A computer system consists of hardware, system programs, and application programs figs 12
Ngày tải lên :
28/04/2014, 16:35
... names found = 0; for (p = &proc table[0]; p < &proc table[PROC TABLE SIZE]; p++) { if (p->proc pid == pid) { found = 1; break; } } Fig 12-4 Code for searching the process table for a given PID ... i-node cache for Fig 6-39 Title Chief programmer Copilot Administrator Editor Secretaries Program clerk Toolsmith Tester Language lawyer Duties Performs the architectural design and writes the ... Event-driven code Layer System call handler File system File system m Virtual memory Driver Driver Driver n Threads, thread scheduling, thread synchronization Interrupt handling, context switching,...
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System Analysis and Design - Complete Introductory Tutorial for Software Engineering
Ngày tải lên :
27/10/2013, 23:15
... the information can be categorized as: strategic information, managerial information and operational information Strategic information is the information needed by top most management for decision ... calculated for each function 40 An expected value is then computed using the following formula where, EV stand for the estimation variable Sopt stand for the optimistic estimate Sm stands for the ... planning policies and upper management >> Managerial information helps middle management and department heads in policy implementation and control >> Operational information is daily information needed...
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SIEMENS - simatic system software for S7-300/400 system and standard functions pot
Ngày tải lên :
29/03/2014, 12:20
... OB81_DATE_TIME DATE _AND_ TIME DATE _AND_ TIME of day when the OB was called 1-30 Relevant only for error codes B#16#31, B#16#32 and B#16#33 System Software for S7-300/400 System and Standard Functions ... manual /231/ and in the STEP online help Audience This manual is intended for programmers and engineers who are familiar with controlling processes and are responsible for writing programs for programmable ... reference information • Ladder Logic (LAD)/Function Block Diagram (FBD)/Statement List (STL) for S7-300/400 manuals • Standard and System Functions for S7-300/400 iv Part of the STEP Standard software...
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Báo cáo sinh học: " Novel data storage for H.264 motion compensation: system architecture and hardware implementation" pdf
Ngày tải lên :
18/06/2014, 22:20
... hardware implementation of a stand alone H.264 q-pel MC on FPGA has shown speeds between 95.9 fps for HD1080p frames, 229 fps for HD 720p and between 2502 and 12623 fps for CIF and QCIF formats ... formats The proposed implementation is able to perform H.264 q-pel MC at speeds between 229.9 fps HD720p and 95.5 fps for 1080p frames and between 12623 and 2187.7 fps for QCIF and CIF, respectively ... image formats, the framerate is considerably higher: between 12623 fps for QCIF and 2502 fps for CIF format The bandwidth toward the memory is visibly improved by an optimal data arrangement and...
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báo cáo hóa học:" Novel data storage for H.264 motion compensation: system architecture and hardware implementation" doc
Ngày tải lên :
20/06/2014, 04:20
... hardware implementation of a stand alone H.264 q-pel MC on FPGA has shown speeds between 95.9 fps for HD1080p frames, 229 fps for HD 720p and between 2502 and 12623 fps for CIF and QCIF formats ... formats The proposed implementation is able to perform H.264 q-pel MC at speeds between 229.9 fps HD720p and 95.5 fps for 1080p frames and between 12623 and 2187.7 fps for QCIF and CIF, respectively ... image formats, the framerate is considerably higher: between 12623 fps for QCIF and 2502 fps for CIF format The bandwidth toward the memory is visibly improved by an optimal data arrangement and...
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Báo cáo toán học: " Novel data storage for H.264 motion compensation: system architecture and hardware implementation" pot
Ngày tải lên :
20/06/2014, 21:20
... formats The proposed implementation is able to perform H.264 q-pel MC at speeds between 229.9 fps HD720p and 95.5 fps for 1080p frames and between 12623 and 2187.7 fps for QCIF and CIF, respectively ... Agency for Innovation by Science and Technology in Flanders (Agentschap voor Innovatie door Wetenschap en Technologie in Vlaanderen) for funding the Vampire project and Alcatel Lucent-Bell (ALU) for ... method and implementation achieves over 217 fps for HD 720p and up to 95.9 fps when using the full HD 1080p streams This is over 50% more than a maximum of 60 fps for HD frames obtained in [7] For...
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Báo cáo hóa học: " Research Article Adaptive Bandwidth Management and Joint Call Admission Control to Enhance System Utilization and QoS in Heterogeneous Wireless Networks" pptx
Ngày tải lên :
22/06/2014, 19:20
... for new and handoff calls In the second implementation, both new and handoff calls can be downgraded to accommodate an incoming new (or handoff) call In this implementation, prioritization of handoff ... bandwidth needed Handoff calls are prioritized over new calls by using different call rejection thresholds for new and handoff calls, and also by using different bandwidth adaptation mechanism for ... service class, and bandwidth requirements The JCAC procedure is shown in Figure 2, where xi, j and yi, j denote, respectively, the residual bbu available in RAT- j for new and handoff class-i calls...
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DC motor position and speed tracking (PAST) system using neural networks
Ngày tải lên :
04/10/2015, 10:25
... system performance Both simulation and experimental tests were carried out to evaluate the performance of the PAST system for different speed and position trajectory profiles DC Motor Speed and Position ... network has fields of neurons: one for the input layer, one for the hidden processing elements and one for the output neurons The connections are for the feed-forward activity As seen from the ... materials, semiconductor technology and mechatronics provide a wide scope of applications for high performance electric motors in various industrial processes For high performance drive applications...
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