architecture of any two real time operating system
Hard Real-Time Computing Systems pdf
... instance of task τi;ri,jdenotes the release time of the jth instance of task τi;G.C. Buttazzo, , Real- Time Systems Series 24,DOI 10.1007/978- - -0 - _ ,Hard Real- Time Computing Systems: ... the result of 20 years of research and teaching activity in the field of real- time systems. The majority of the material presented in this book is based onclass notes for an operating systems course ... globalcompletion time of tc=15units of time. COMPUTATION TIMES REDUCEDOne could think that the global completion time of the task set J could be improved byreducing tasks’ computationtimes of each...
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Báo cáo hóa học: " Research Article Efficient Adaptive Combination of Histograms for Real-Time Tracking" pdf
... J. Denzler, Ecient combina-tion of histograms for real- time tracking using mean-shift andtrust-region optimization,” in Proceedings of the 27th AnnualMeeting of the German Association for Pattern ... image.The gray-level intensity of a point u at time t is given byf (u, t). Accordingly, the vector f(r, t) contains the intensities of the entire region r at time t and is called template. Duringinitialization, ... containsthe time variant parameters of the region, also referredto as the state of the region. Note that R(x(t)) is similar,but not identical, to g(r, à(t)). The later transforms a set of pixel...
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Báo cáo khoa học: "A System for Real-time Twitter Sentiment Analysis of 2012 U.S" pdf
... module. Figure 1. The system architecture for real- time processing Twitter data Preprocessinge.g.,TokenizationMatch Tweetto Candidate Real- time Twitter dataThrottleSentimentModelAggregate ... of Southern California, Los Angeles, CA {haowang@, dogancan@, kazemzad@, fbar@, shri@sipi}.usc.edu Abstract This paper describes a system for real- time analysis of public sentiment ... volume within each time period for each candidate. For volume, the system outputs the number of tweets every minute for each candidate. For sentiment, the system outputs the number of positive,...
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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
... averagenumber of visits to any other state (e.g., S2) starting from any initial state, times the probability of using any rule in thefinal state, is also bounded below by (A.1).Thus, the total number of ... scalability,reliability, and performance objectives of large-scale, real- time stream mining systems [5, 7–9]. In particular, manymining applications implement topologies of classifiers tojointly accomplish ... successive identification of streamdata.Nevertheless, several key challenges remain for config-uring networks of classifiers in distributed stream miningsystems. First, real- time stream mining applications...
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Báo cáo hóa học: "Design and implementation of a real time and train less eye state recognition system" docx
... in parallel, speed of the FPGA implementation of any system is higher than speed of its software implementation. Furthermore, FPGAs are reconfigurable device, minimizing time- to-market, and ... implementation used 4% of the XC3SD3400A FPGA of Spartan 3-A DSP family. Result of this hardware implementation showed a fast architecture, i.e., the total time to process the image of an eye with ... RAM, are shown in data of this minimum or maximum, di–4, is obtained from R4 of the register bank. Figure 9 shows the architecture of this process. Last unit of this system is the condition...
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Báo cáo hóa học: "Research Article Two-Step Time of Arrival Estimation for Pulse-Based Ultra-Wideband Systems" potx
... Article Two- Step Time of Arrival Estimation forPulse-Based Ultra-Wideband SystemsSinan Gezici,1Zafer Sahinoglu,2Andreas F. Molisch,2Hisashi Kobayashi,3and H. Vincent Poor31Department of ... DardariIn cooperative localization systems, wireless nodes need to exchange accurate position-related information such as time -of- arrival(TOA) and angle -of- arrival (AOA), in order to obtain ... signals. The high time resolution of UWB signals presents a potentialfor very accurate positioning based on TOA estimation. However, it is challenging to realize very accurate positioning systems inpractical...
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Báo cáo hóa học: " Editorial Operating System Support for Embedded Real-Time Applications" potx
... 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-alonesystems, ... re-quirements. As a result of these limitations, the system hastodealwithanefficient use of the computationalresources.(ii) Real- time application requirements. Some of the ap-plications to be ... Quality of service. An efficient use of the system re-sources is a must in embedded systems. Feedback-based approaches are being used to adjust the per for-mance or quality of service of the...
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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
... Bissom, “Dy-namic integrated scheduling of hard real- time, soft real- time and non -real- time processes,” in Proceedings of the 24th IEEEInternational Real- Time Systems Symposium (RTSS ’03),pp.396–407, ... In thesesystems, achieving end-to-end quality of service (QoS) re-quires integrating a range of real- time capabilities, such asQoS-enabled network protocols, real- time operating system scheduling ... use the operating system facilities,such as /proc file system in Linux/Unix operating systemsand the system registry in Windows operating systems, tocollect resource utilization metrics of that...
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The Duality of Memory and Communication in the Implementation of a Multiprocessor Operating System
... use of cache memory and remote access times are roughly 10 times greaterthan local access times. Because NUMA architectures allow greater numbers of CPUs to be put in a single machine,many ... Symposium on Operating System Principles, pages 64-75. December, 1981.[16] Rashid, R.F.From RIG to Accent to Mach: The Evolution of a Network Operating System. In Proceedings of the ACM/IEEE ... implemented on a range of architectures.Today, the concept of an extensible operating system is once again gaining acceptance this time as the solutionto the unconstrained growth of UNIX. During the...
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Real-Time Digital Signal Processing - Chapter 5: Design and Implementation of FIR Filters
... summation of yin will be equal to the output y(n). This property isalso called the superposition.A time- invariant system is a system that remains unchanged over time. A digital filteris time- invariant ... It also implies that the characteristics of a time- invariant filterwill not change over time. A digital filter is causal if the output of the filter at time n0does not depend on theinput applied ... This is impossible for any real physical filter.Linear, time- invariant filters are characterized by magnitude response, phaseresponse, stability, rise time, settling time, and overshoot. Magnitude...
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Real-Time Digital Signal Processing - Chapter 6: Design and Implementation of IIR Filters
... transition band, the order of the Butterworth filter required isoften higher than that of other types of filters. In addition, for a large L, the overshoot of the step response of a Butterworth filter ... indeed meetsthe goals of the application. In addition, such a software implementation may beadequate if the application does not require real- time processing.For computer software implementation, ... filtersare often implemented in the form of cascade or parallel second-order sections for real- time applications. For instance, the fourth-order Butterworth filter given by Example6.12 can be realized...
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