basic concepts of real time operating systems ppt

... 1DYNAMIC SCHEDULING OF REAL-TIME CONTROL SYSTEMSQIAN LIN A DISSERTATION SUBMITTED FORTHE DEGREE OF MASTER OF ENGINEERINGDEPARTMENT OF MECHANICAL ENGINEERING NATIONAL UNIVERSITY OF SINGAPORE 2004 ... attributes The period and execution time are adjusted to make the tasksschedulable.In this kind of co-design of real-time control systems, there are fundamentaltrade-offs between the different task ... implement computer-based control systems: time design of the controller followed by discretization, and direct discrete-timedesign of the controller continuous-2.1.1 Discrete-time design Discrete design

Ngày tải lên: 04/10/2015, 17:06

... algorithms(1)  In hard real-time systems, feasibility of the schedule should be guaranteed before task execution  In order to guarantee feasibility:  Static real-time systems: - Off-line scheduling ... cumulative value of utility function values of all tasks is used Trang 43Examples of cost functionsv(fi) on time fi di(c) v(fi) v(fi) v(fi) firm di(d) (b) (a) Non real - time soft di Trang 44NLT, ... Why preemption is needed in real-time systems?  Exception handling of a task  Treating with different criticalities of tasks, permits to anticipate the execution of the most critical activities

Ngày tải lên: 30/01/2020, 01:18

... open-source real-time in-strumentation middleware for distributed real-time and embedded (DRE) systems.OASIS enables real-time instrumentation of DRE systems without a priori knowledge of metric ... experience report for adding real-time monitoring support over the Web to the Open-source Architecture of Software Instrumentation of Systems (OASIS),which is open-source real-time instrumentation middleware ... Date Darshan Gajanan Puranik Real-time Monitoring of Distributed Real-time Embedded Systems using Web Trang 2EMBEDDED SYSTEMS USING WEBA ThesisSubmitted to the Faculty ofPurdue University byDarshan

Ngày tải lên: 24/08/2014, 12:08

... IMPROVED SYMBOLIC MODEL CHECKING OF REAL-TIME SYSTEMS TRUONG KHANH NGUYEN NATIONAL UNIVERSITY OF SINGAPORE 2014 IMPROVED SYMBOLIC MODEL CHECKING OF REAL-TIME SYSTEMS TRUONG KHANH NGUYEN (B.Eng., ... correctness of real- time systems In this chapter, we give an overview of real- time model checking and discuss the research gaps Then, we present the objectives of this thesis 1.1 Real- ... of available model checkers on timed automata... Similarly, Sun et al [95] proposed Stateful Timed CSP, an extension of Timed CSP, to model hierarchical realtime systems Stateful Timed

Ngày tải lên: 09/09/2015, 11:10

... Real-time Systems Week 2: Real-time Operating System (RTOS) Ngo Lam Trung Dept of Computer Engineering NLT, SoICT, 2014 Content  Real-time operating system (RTOS)  Components of RTOS ... A part of scheduler that performs context switching and changes the flow of execution  At any time an RTOS is running, the flow of execution(flow of control), is passing through one of three ... hardware and software contribute to system performance NLT, SoICT, 2014 Compactness  Constraints of embedded systems:    Design requirements    Limit system memory Limits the size of the application

Ngày tải lên: 30/01/2020, 00:56

... RMS of acceleration of a fall forward from standing Figure 3.17 The RMS of acceleration of crawling then falling as the scenario of To evaluate the accuracy, specificity, and sensitivity of the ... 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' locations ... The RMS of acceleration of crawling then falling as the scenario in Table 3.6 presents a comparison of the testing performance of our newly proposed algorithms for fall detection and loss of physical

Ngày tải lên: 27/06/2022, 11:09

... in cytological studies Trang 4Oxygen is one of the most fundamental elements for animals, plants, fungi, andbacterial systems Real-time measurement of oxygen concentration, transport, andrespiration ... concentration of analytes, oxygen in this case, changes thelifetime and intensity of the fluorescence signals9,10 These measurable characters offluorescence signals reflect the concentration of the ... advantages over measurement of fluorescence intensity, in terms ofstability and photobleaching of fluorescence dyes9,10 Based on applying the principlesof frequency domain lifetime approaches, shifts

Ngày tải lên: 18/10/2022, 16:11

... Trang 1Predicting the Effect of Task Jitter in Real Time Control Systems A thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy LONG QUANG TRAN B.Eng ... Unix-like real-time operating system RTOS Real-time operating system TTC time triggered cooperative ZOH zero-order-hold Trang 131 Abstract Designing a real-time embedded control system requires ... characterisation by Nahas [25] 12 Fig 2-3 Illustration of jitter in different calls of a periodic task [28] (𝑟: release time, 𝑠: start time and 𝑓: finish time) 12 Fig 2-4 Jitter characterisation by Marti

Ngày tải lên: 29/10/2022, 01:39

... process with separation of concerns for the development of embedded real-time software systems Marco Panunzio1, Tullio Vardanega1 Department of Mathematics, University of Padova via Trieste 63, ... component-based process with separation of concerns for thedevelopment of embedded real-time software systems Author: Marco Panunzio Tullio Vardanega This is a PDF file of an unedited manuscript that ... particular instantiation of the system The Ptolemy project [28] studies modeling, simulation, and design of concurrent, real-time, embedded systems realized as an assembly of concurrent components

Ngày tải lên: 01/11/2022, 08:29

... analysis of Al planning systems The ideas presented are fundamental to the development of a mathematical theory for the modeling, analysis, and design of Al planning systems for real time environments ... verification of AI planning systems Trang 2issues and to create a mathematical theory of AI planning systems that operate in dynamic, uncertain, and time-critical environments (real time environments) ... analysis, and design techniques for these systems AI planning systems are examples of AI problem solving systems When comparing the characteristics of AI and non-AI systems, one can make the following

Ngày tải lên: 14/12/2013, 12:15

... Definitions The set (or collection) of all real numbers is denoted by R1 The set of ordered pairs of real numbers is denoted by R2 , the set of. .. A set S of numbers is said to be inductive ... The collection of real numbers between 0 and 10 is not inductive, since it satisfies (a) but not (b) No finite set of real numbers... “only one” part of Axiom A-5 Axioms of Multiplication ... that is devoid of members Most often we will deal with sets each of which is specified by some property or properties of its elements For example, we may speak of the set of all even

Ngày tải lên: 31/03/2014, 15:12

... principle of virtual work 228 c Proof of the weak theorem of virtual work 229 A2 Strong principle of virtual work 232 a Virtually migrating control volumes 232 b Forces Strong principle of ... trajectory Z(τ ) of the particle that passes through X ∈ ∂P (t) at time t the unique solution of Given a field (X, t), the time derivative of following ∂P , as described by q, is the time derivative ... arbitrarily chosen time The phrase invariant under a change in observer then signifies invariance at the time of coincidence. For a change in spatial observer the relative velocity at time of coincidence

Ngày tải lên: 24/04/2014, 16:48

... exponential stabilizability of discrete-time systems with time-delayed states Finally, as an application, we consider the global stabilization of the nonlinear control systems Preliminaries In this ... for discrete-time systems,” IEEE e Transactions on Automatic Control, vol 41, no 6, pp 903–907, 1996 12 E N Chukwu, Stability and Time-Optimal Control of Hereditary Systems, vol 188 of Mathematics ... 37, no 2, pp 521–542, 1999 10 E K Boukas, “State feedback stabilization of nonlinear discrete-time systems with time-varying time delay,” Nonlinear Analysis: Theory, Methods & Applications, vol

Ngày tải lên: 21/06/2014, 20:20

... the multiplicity of solutions for a class of Hamiltonian systems with the px-Laplacian. Under suitable assumptions, we obtain a sequence of solutions associated with a sequence of positive energies ... solutions of ellipticsystems,” Transactions of the American Mathematical Society, vol 355, no 7, pp 2973–2989, 2003. 8 P L Felmer, “Periodic solutions of “superquadratic” Hamiltonian systems,” ... the multiple solutions for a kind of elliptic systems on a smooth bounded domain Motivated by their work, we will consider the following sort of px-Laplacian systems with “concave and convex

Ngày tải lên: 22/06/2014, 03:20

... presented 2 OVERVIEW OF THE SABA REAL-TIME MIMO TESTBED The SABA (smart antennas for broadband access) real-time MIMO testbed is designed for one base station with an ar-ray of four antennas and ... enables real-time processing of the algorithms used The carrier frequency is 10.525 GHz with a bandwidth of 30 MHz Up- and downlink use the same spectrum and are separated in the time domain (TDD, time ... Block diagram of the transceiver The block diagram of Figure 11 gives an overview of the analog signal processing of a transceiver Each transceiver of our demonstrator consists of filters, amplifiers,

Ngày tải lên: 22/06/2014, 23:20

... in Phylogenetics and Phylogeography of Terrestrial and Aquatic Systems The existence of hybrids and the maintenance of alleles of C jejuni origin within the C coli gene ... evolution of the genus can be obtained if the time scale for the divergence of lineages can be overlaid upon the tree of genetic relatedness By cross-referencing estimated dates of divergence ... Ocean off the southeast coast of Africa. In old islands, species radiate, diverge and evolve into lineages distant from the ancestral types but with a variable amount of gene flow in or out of

Ngày tải lên: 28/06/2014, 08:20

... a time where two materials rubbed against each other both became either positive or negative Trang 4Following Franklin's speculation of the wool rubbing something off of the wax, the type of ... change the type of atom that it is In fact, if you could remove three protons from the nucleus of an atom of lead, you will have achieved the old alchemists' dream of producing an atom of gold! The ... attracting or repelling depending on the types of charges involved The operational definition of a coulomb as the unit of electrical charge (in terms of force generated between point charges) was

Ngày tải lên: 09/08/2014, 13:21

... the evaluation of best suited refer-ence gene(s) for normalization of qPCR data in a given set of biological samples Recognizing the importance of reference genes in normalization of RT-qPCR data, ... μL of diluted cDNA (1:50), 0.2 μM of each primer, 50 μM of each dNTP, 1× PCR Buf-fer (Invitrogen), 3 mM MgCl2, 2 μL of SYBR®Green I (Molecular Probes) water diluted (1:10000), and 0.25 units of ... reliable normalization of qPCR results for gene expression studies in this important crop, the major source of natural fiber and also an important source of edible oil The use of bona fide reference

Ngày tải lên: 12/08/2014, 03:21

... performance [16] Systems of post-event debriefing of the cardiac arrest team of real life resuscitation atempts were associated with improved: knowledge; adherence to guidelines; quality of CPR and ... performance category of patients Trang 6Page 5 of 17 at discharge The process focussed outcomes focus on both quality of CPR and team factors Quality of CPR outcomes are: quality of 2222 call; chest ... and confusion at a time when they are already burdended by either the loss of a loved one or shock of a sudden deterioation in health status Our assessment of the burdens of approaching relatives

Ngày tải lên: 13/08/2014, 23:20