embedded reactive and real time systems

... Radxa Rock Pro and ASUS PF500KL Intel Core-i5 2.5GHz PC and quad-core ARM Cortex-A9 Real-time 8fps 20fps 22fps and 30fps 20fps on PC 15fps on ARM Overall 7 CONCLUSION The design and implementation ... which takes advantage of the Truong Quang Vinh Design and Implementation of Portable Embedded System for Real-Time Traffic Sign Detection and Recognition T Trang 2invariant properties of the ... types of traffic signs, and notify the drivers by displaying the result on the LCD and playing the voice This system is required to be compact, portable, real-time processing, and highly accurate

Ngày tải lên: 12/01/2020, 03:06

... holds nothing but wants S  Process D holds U and wants S and T  Process E holds T and wants V  Process F holds W and wants S  Process G holds V and wants U Example ... mutexmultiple times in the locked state - The number of times of recursive acquirement is managed by lock count - Useful when the owner task requires exclusive access to shared resource and calls ... 23Solution 2: If philosopher could not acquire fork:  Wait for a random duration  Retry  Simple and efficient  Minimize lock-state time  But not lock-state free  Cannot be used in critical system

Ngày tải lên: 30/01/2020, 04:10

... showcasing its effectiveness.Turning Time and Direction EstimationTime estimation is crucial for indoor positioning systems, enabling the precise and real-time tracking of on-duty firefighters' ... BMP180 pressure sensor, and MQ7 sensor, to eliminate random and systematic errors These sensors are connected to a microcontroller that records and processes data using an embedded algorithm The ... computational demands, conserving energy and enabling real-time operation.Research MethodologyThis study successfully integrates theoretical research, simulation, experimental testing, and expert consultation

Ngày tải lên: 27/06/2022, 11:09

... dierent orthogonal aspects of time: (i) real-time, concerning the expression of time constraints and the veri cation of exact time properties, and (ii) probabilistic-time, concerning the probabilistic ... for performance evaluation and model-checking of non-probabilistic real-time properties Moreover, the advantage of deriving a traditional pure stochastic-time and real-time model from the same ... the real-time and probabilistic-time in a single speci cation paradigmallowsustomodelaconcurrentsystemmorepreciselybyexpressing and analyzing the relationships between the two aspects of time

Ngày tải lên: 02/11/2022, 08:46

... 19: Real-Time SystemsTrang 219.2 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 1, 2005Chapter 19: Real-Time Systems Trang 319.3 Silberschatz, Galvin and Gagne ... Edition, Jan 1, 2005Features of Real-Time Kernels standard desktop system hardware that what is typically available in a real-time system Trang 919.9 Silberschatz, Galvin and Gagne ©2005 Operating ... in Real-Time Systems addresses Trang 1019.10 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 1, 2005Address Translation Trang 1119.11 Silberschatz, Galvin and

Ngày tải lên: 13/05/2014, 00:36

... (Applied Biosystems, Foster City, CA), 1 μl of each primers (900 nM), 1 μl Taqman probe (250 nM), and 1.5 μl cDNA sample All real-time PCR reactions were performed in a StepOne real-time PCR machine ... (miR159a and miR159b) have been sequenced more than 5,000 times in mature pollen Since the expression of these two miRNAs was not detected by either real-time PCR or regular RT-PCR (Table 1 and Figure ... Arabidopsis mature pol-len using miRNA array and real-time PCR techniques Our results indicated that ~60% of known Arabidopsis miR-NAs are expressed in mature pollen, and most of them are present at lower

Ngày tải lên: 12/08/2014, 03:20

... analyzed, and utilized tomodel specific medical procedures Figure 1.5 shows examples of a volume-renderedand a surface-rendered torso of a patient Producing realistic data models and providing real-time ... model can simulate elastic deformations of soft Trang 29Simula-organs and tissues with both high visual realism and real-time performance utilizingtetrahedral meshes of varied resolutions.In ... Ellwanger, Mr Tuncer C Aysal, Mr Steve Krufka, and Dr PraveenThiagarajan; and the staff at the Department of Electical and Computer Engineeringand at the Delaware Biotechnology Institute.I must

Ngày tải lên: 13/11/2014, 16:25

... 1Introduction Real-time systems are now becoming pervasive and are playing a vital role in ourworld Examples of real-time systems range from biological systems and businesssoftware to safety-critical systems ... integration ofTimed CSP [90] and Object-Z [43] Inheriting the strengths of Timed CSP andObject-Z, TCOZ provides a unified notation for modeling both the state and processaspects of complex real-time systems ... Similarly, Sun et al [95]proposed Stateful Timed CSP, an extension of Timed CSP, to model hierarchical real-time systems Stateful Timed CSP extends Timed CSP with timed process constructsto capture timing

Ngày tải lên: 09/09/2015, 11:10

... monitoring requiresin-line sensors and real-time algorithms to facilitate real-time analysis of sensorsignals [14] Therefore, in order to implement real-time CD monitoring and con-trol effectively, we ... measured and referencespectrums is proposed for real-time monitoring and control Result shows CD non-uniformity can be significantly reduced to less than 10nm With this system, real-time monitoring and ... equipment and each step has the possibility toinduce some kind of error or defect and therefore stringent process monitoring andcontrol along the line is required for real-time fault detection and

Ngày tải lên: 09/09/2015, 18:50

... ENHANCE FRAMEWORK ON HAIR MODELING AND REAL-TIME ANIMATION LIANG WENQI NATIONAL UNIVERSITY OF SINGAPORE 2003 Trang 2AN ENHANCE FRAMEWORK ON HAIR MODELING AND REAL-TIME ANIMATION LIANG WENQI A ... opportunity and provides me all kinds of facilities that make my thesis possible Trang 5Maximizing visual effect is a major problem in real-time animation One work was proposed on real-time hair ... these techniques are not suitable for real-time hair animation Recently, Koh and Huang [Koh00, Koh01] proposed a strip based approach that animates in real-time But because of the 2D strip used,

Ngày tải lên: 28/09/2015, 13:21

... look first at real- time issues, then some specific embedded issues, and finally, at trends and issues that commonly apply to both realtime and embedded systems Real- Time Systems A real- time system ... their deadlines Hard real- time systems are commonly also embedded systems Differences between real- time and time- shared systems Real- time systems are different from time shared systems in the three ... fundamentally different from time- shared systems Overview of Embedded and Real- Time Systems 21 DSP Systems are Hard Real- Time Usually, DSP systems qualify as hard real- time systems As an example, assume...

Ngày tải lên: 22/09/2016, 10:03

... e.g., the Internet, embedded systems, mobile devices and so on This is especially true for concurrent and real- time systems, which have concurrent executions, shared resources and timing factors ... Model Checking Real- time Systems Computers are frequently used in critical applications where predictable response times are essential for correctness Such systems are called real- time systems Examples ... is an important and nontrivial task There are two time semantics in the definition of real- time systems Discrete -time semantics [11] requires that all time readings are integers and all clocks...

Ngày tải lên: 14/09/2015, 08:38

... of real- time systems 1.3 EXAMPLE REAL- TIME SYSTEMS Embedded real- time systems are so pervasive that they are even found in household appliances and toys A small sampling of real- time domains and ... Operating Systems Queuing Theory Disciplines that impact on real- time systems engineering 1.3 ž ž ž ž ž ž EXAMPLE REAL- TIME SYSTEMS 13 Specification and design of real- time systems and correct ... by making unnecessary the notion of timeliness, every system becomes a real- time system Real- time systems are often reactive or embedded systems Reactive systems are those in which scheduling...

Ngày tải lên: 03/06/2014, 01:51

... on real- time architectures and continues with a section (Chapters and 6) on specification and verification of real- time systems, a section on real- time scheduling algorithms (Chapters to 9) and ... in real- time database systems and describes some concurrency control algorithms for accessing temporal data Then, it deals with analysing validity of active real- time systems and effects real- time ... constraint is the brakes release time to prevent the wheel from locking Real- time software may use synchronous programming languages, real- time operating systems and real- time networks providing essential...

Ngày tải lên: 28/06/2014, 11:20

... of real- time systems 1.3 EXAMPLE REAL- TIME SYSTEMS Embedded real- time systems are so pervasive that they are even found in household appliances and toys A small sampling of real- time domains and ... Operating Systems Queuing Theory Disciplines that impact on real- time systems engineering 1.3 ž ž ž ž ž ž EXAMPLE REAL- TIME SYSTEMS 13 Specification and design of real- time systems and correct ... by making unnecessary the notion of timeliness, every system becomes a real- time system Real- time systems are often reactive or embedded systems Reactive systems are those in which scheduling...

Ngày tải lên: 13/08/2014, 08:20

... subtraction has subtract and and subtrahend, multiplication has multiplicand and multiplier, and division has dividend and divisor In a generic sense, the two terms “operandam” and “operandum” can be used ... for real- time system designers? Are they any different for non -real- time systems? 2.7 Compare and contrast the different memory technologies discussed in this chapter as they pertain to real- time ... synchronization and communication via semaphores, mailboxes, and other methods A real- time executive is a kernel that includes privatized memory Synonymously called “task.” Real- Time Systems Design and Analysis,...

Ngày tải lên: 13/08/2014, 08:20

... theoretical results in real- time operating systems (RTOS), a fairly rigorous formulation is necessary Most 3.2 THEORETICAL FOUNDATIONS OF REAL- TIME OPERATING SYSTEMS 89 real- time systems are inherently ... full-featured, real- time operating systems because the number of real- time tasks can vary This architecture is used in interactive on-line systems where tasks (associated with users) come and go This ... τ2 , and τ3 have decreasing priorities, and τ1 and τ3 share some data or resource that requires 118 REAL- TIME OPERATING SYSTEMS Normal Execution Blocked t1 t2 t3 t0 t1 t2 t3 t4 t5 t6 t7 t8 Time...

Ngày tải lên: 13/08/2014, 08:20

... high-resolution interval timer structure: struct itimerspec{ struct timespec it_value, it_interval; }; int timer_settime (timer_t timerid, int flag, struct itimerspec *value, struct itimerspec *oldvalue); ... sigevent *event, timer_t *timer_id); As per POSIX standard, different platforms can have multiple time bases, but every platform must support at least the CLOCK_REALTIME time base A timer based upon ... time- of-day clock” is the CLOCK_REALTIME clock, defined in the time. h header file The CLOCK_REALTIME clock is a systemwide clock, visible to all processes running on the system The CLOCK_REALTIME...

Ngày tải lên: 13/08/2014, 08:20

... Event All Traffic Standards/Display of Commanded Phase All Traffic Standards/Display of Commanded Phase All Traffic Standards/Display of Phase All Traffic Standards/Display of commanded phase Intersection ... Traffic Standards/Display of Default State Intersection Controller/Cycle Time and Splits updated Intersection Controller/Cycle Time and Splits updated All Traffic Standards/Display of Commanded Phase ... system to coexist and cooperate with other systems For example, in real- time systems the software must be able to communicate with various devices using standard bus structures and protocols A...

Ngày tải lên: 13/08/2014, 08:20

... early, non -real- time imageprocessing systems were data and action intensive, but did not encounter much in the way of stimuli and response Real- time systems are usually data intensive and would ... more suitable then SD for the embedded real- time systems and the inertial measure unit in particular SD and object-oriented design are often compared and contrasted, and, indeed, they are similar ... Structured Analysis and Structured Design in Real- Time Applications There are several apparent problems in using structured analysis and structured design (SASD) to model the real- time systems, including...

Ngày tải lên: 13/08/2014, 08:20