vtu notes download real time operating system
Hard Real-Time Computing Systems pdf
Ngày tải lên :
01/04/2014, 17:20
... queue. Operating systems
that handle different types of tasks may have more than one ready queue.
G.C. Buttazzo,
, Real- Time Systems Series 24,
DOI 10.1007/978- - -0 - _ ,
Hard Real- Time Computing ... systems,
space missions,
consumer electronic devices,
multimedia systems,
smart toys, and
virtual reality.
In many cases, the real- time computer running the application is embedded into the
system ... critical time constraints cannot
be verified a priori and the operating system does not include specific mechanisms
for handling real- time tasks, the system could apparently work well for a period of
time, ...
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Báo cáo hóa học: " Editorial Operating System Support for Embedded Real-Time Applications" potx
Ngày tải lên :
21/06/2014, 22:20
... Corporation
EURASIP Journal on Embedded Systems
Volume 2008, Article ID 502768, 2 pages
doi:10.1155/2008/502768
Editorial
Operating System Support for Embedded
Real- Time Applications
Alfons Crespo,
1
Ismael ... is
placing enormous demands on the facilities that an embed-
ded operating system must provide.
Embedded systems can be defined as computing systems
with tightly coupled hardware and software that are ... that these systems are usually an integr al part
of a larger system.
We can find a large variety of applications where embed-
ded systems play an important role, from small stand-alone
systems,...
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Event Order Abstraction for Parametric Real-Time System Verification pptx
Ngày tải lên :
07/03/2014, 17:20
... model certain class of real- time systems like a biphase mark protocol
[31].
The Alur-Dill timed automata framework [1] is arguably the best known framework to model a real- time
system, and is the ... exclusion algorithm.
1 Introduction
In a typical real- time system, timing constraints on the system s behavior are used to ensure its correctness. Such
a system is often modeled by using a set of timing ... Thomas A. Henzinger, Zohar Manna, and Amir Pnueli. Timed transition systems. In REX workshop Real-
Time: Theory in Practice, volume 600 of Lecture Notes in Computer Science, pages 226–251. Springer-
Verlag,...
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Báo cáo khoa học: "A System for Real-time Twitter Sentiment Analysis of 2012 U.S" pdf
Ngày tải lên :
16/03/2014, 20:20
... infrastructure and
sentiment model to analyze in real- time public
sentiment on Twitter toward the 2012 U.S.
presidential candidates. Our effort to gauge
political sentiment is based on bringing ... desirable.
Figure 1 shows our system s architecture and its
modules. Next, we introduce our data source and
each individual module.
Figure 1. The system architecture for real- time processing Twitter ... Republic of Korea, 8-14 July 2012.
c
2012 Association for Computational Linguistics
A System for Real- time Twitter Sentiment Analysis of
2012 U.S. Presidential Election Cycle
Hao Wang*, Dogan...
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Báo cáo khoa học: "Understanding Unsegmented User Utterances in Real-Time Spoken Dialogue Systems" doc
Ngày tải lên :
17/03/2014, 07:20
... with system A 1.4 to 2.2 times
quicker than with system B and one subject com-
pleted it with system B one second quicker than
with system A. A statistical hypothesis test showed
that times ... 15:331-340.
207
pared: one that uses ISSS (system A), and one
that requires each speech interval to be an SU
(an interval-based system, system B). In system B,
when a speech interval was not ... unclear. On the other hand, responding to
a user utterance in real time requires understanding
it and updating the belief state in real time; thus,
it is impossible to wait for subsequent inputs...
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real-time systems design and analysis, 4th edition
Ngày tải lên :
24/04/2014, 16:03
... for
Real- Time Systems
7. Performance
Analysis Techniques
6. Software Design
Approaches
9. Future Visions
on Real- Time
Systems
1. Fundamentals of
Real- Time Systems
3. Real- Time
Operating Systems
4. ... to use. Most of the literature refers to such
systems as soft real - time systems.
Defi nition: Hard Real - Time System
A hard real - time system is one in which failure to meet even a single ... considered real - time; it must
simply have response times that are constrained appropriately.
When is a system real - time? It can be argued that all practical systems are
ultimately real - time systems....
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Chapter 19 Real - time systems
Ngày tải lên :
13/05/2014, 00:36
...
processor time.
19.11
Silberschatz, Galvin and Gagne â2005
Operating System Concepts 7
th
Edition, Jan 1, 2005
Implementing Real- Time
Implementing Real- Time
Operating Systems
Operating Systems
■
In ... Galvin and Gagne â2005
Operating System Concepts 7
th
Edition, Jan 1, 2005
Bus-Oriented System
Bus-Oriented System
Chapter 19: Real- Time Systems
Chapter 19: Real- Time Systems
19.20
Silberschatz, ... 1, 2005
Overview of Real- Time Systems
Overview of Real- Time Systems
■
A real- time system requires that results be produced within a
specified deadline period.
■
An embedded system is a computing...
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real-time systems design and analysis an engineers handbook
Ngày tải lên :
03/06/2014, 01:51
... hard real- time systems, it will use the
term real- time system to mean embedded, hard real- time system, unless other-
wise noted.
1.1.2.2 The Nature of Time It is typical, in studying real- time systems, ... engineering of real- time systems.
1.3 EXAMPLE REAL- TIME SYSTEMS
Embedded real- time systems are so pervasive that they are even found in house-
hold appliances and toys. A small sampling of real- time domains ... overview of the nature of real- time systems. Much
of the basic vocabulary relating to real- time systems is developed along with a
discussion of the challenges facing the real- time system designer. Finally,...
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Báo cáo hóa học: " Research Article A Speed-Adaptive Media Encryption Scheme for Real-Time Recording and Playback System" pot
Ngày tải lên :
21/06/2014, 11:20
... Admire System. As is shown in Figures
1 and 2, the Admire (ADvanced Multimedia Interactive
Real- time Environment) system [2, 6, 7] is a heterogeneous
wireless network-oriented large-scale multimedia ... Admire system, so a speed adaptive encryption scheme is
needed.
3. The Proposed AdmireRPS
3.1. AdmireRPS in Admire System. AdmireRPS is the secure
recording and playback system of Admire system. ... original work is properly cited.
The recording and playback system (RPS) in video conference system needs to store mass of media data real- timely. Considering
the security issue, media data should...
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Báo cáo hóa học: "Research Article A Rules-Based Approach for Configuring Chains of Classifiers in Real-Time Stream Mining Systems Brian Foo and Mihaela van der Schaar" pot
Ngày tải lên :
21/06/2014, 19:20
... analysis,” ACM SIGOPS
Operating Systems Review, vol. 40, no. 3, pp. 31–37, 2006.
[13] B. Foo and M. van der Schaar, “Distributed classifier chain
optimization for real- time multimedia stream mining ... in distributed stream mining
systems. First, real- time stream mining applications must
cope effectively with system overload due to large data
volumes, or limited system resources, while maintain-
ing ... an algorithm in the current
system state, and the algorithm is applied to reconfigure
the system. The result can be measured during the next
time interval, and the system can then determine its...
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Báo cáo hóa học: "Design and implementation of a real time and train less eye state recognition system" docx
Ngày tải lên :
21/06/2014, 19:20
... i.e., the total time to process the image of an eye with 136
ì
82 pixels in this
system is 136
à
s. This is a hardware implementation of an eye state recognition for real
time.
Competing ... Technology,
ICCET'09, 2009, pp 554–559
14. T Hong, H Qin, Q Sun, An improved real time eye state identification system in
driver drowsiness detection, in IEEE International Conference on Control ... drowsiness warning system based on the fuzzy
logic images analysis. Expert Syst. Appl. 34(2), 1556–1561 (2008)
13. Y Lei, M Yuan, X Song, X Liu, J Ouyang, Recognition of eye states in real time
video,...
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Báo cáo hóa học: "Research Article Dynamic Subcarrier Allocation for Real-Time Traffic over Multiuser OFDM Systems" ppt
Ngày tải lên :
21/06/2014, 20:20
... the system time is scaled in terms of
OFDM symbol time. The remaining time to the deadline of
the HOL packet at queue k is
r
k
=
τ
k
−w
k
s
, ∀k ∈
[
1, K
]
,(7)
where s is the OFDM symbol time. ... active times in the system
follow the exponential distribution with mean 10 seconds.
In this section, we assume that all users have the same type of
real- time traffic. During each user’s active time, ... in the system. Finally, compared with
other widely used scheduling algorithms, simulation results
show that our proposed algorithm significantly improves the
system performance for real- time users...
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Báo cáo hóa học: " Research Article Design and Performance Evaluation of an Adaptive Resource Management Framework for Distributed Real-Time and Embedded Systems" pptx
Ngày tải lên :
22/06/2014, 00:20
... range of real- time capabilities, such as
QoS-enabled network protocols, real- time operating system
scheduling mechanisms and policies, and real- time middle-
ware services, across the system domain. ... capabilities of the system
(such as operating system scheduling mechanism and poli-
cies), they are not sufficient for DRE systems as these systems
require integrating a range of real- time capabilities ... across
the system domain. Conventional QoS-enabled middleware
technologies, such as real- time CORBA [3] and the real- time
Java [4], have been used extensively as an operating platforms
to build DRE systems...
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Báo cáo hóa học: " Research Article Embedded System for Real-Time Digital Processing of Medical Ultrasound Doppler Signals" docx
Ngày tải lên :
22/06/2014, 01:20
... perform all needed processing in real time.
In this paper, an embedded system for multichannel
multigate (MCMG) US echography is described. The system
was conceived and realised as programmable research ... proprietary software is used
to configure the MCMG system and for real- time display
purposes. At any time, the acquisition can be stopped to
download the data gathered in the circular buffer to ... typical of aging.
4. CONCLUSION
In this paper, an embedded system for real- time digital
processing of US signals has been presented. The system
is capable of transmitting arbitrary waveforms, simulta-
neously...
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