architecture of any two real time operating system

Ngày tải lên: 24/08/2014, 12:08

Ngày tải lên: 01/01/2014, 18:47

... instance of task τ i ; r i,j denotes the release time of the jth instance of task τ i ; 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 on class notes for an operating systems course ... global completion time of t c =15units of time. COMPUTATION TIMES REDUCED One could think that the global completion time of the task set J could be improved by reducing tasks’ computationtimes of each...

Ngày tải lên: 01/04/2014, 17:20

... J. Denzler, Ecient combina- tion of histograms for real- time tracking using mean-shift and trust-region optimization,” in Proceedings of the 27th Annual Meeting of the German Association for Pattern ... image. The gray-level intensity of a point u at time t is given by f (u, t). Accordingly, the vector f(r, t) contains the intensities of the entire region r at time t and is called template. During initialization, ... contains the time variant parameters of the region, also referred to 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...

Ngày tải lên: 22/06/2014, 00:20

Ngày tải lên: 22/06/2014, 23:20

Ngày tải lên: 23/06/2014, 01:20

... module. Figure 1. The system architecture for real- time processing Twitter data Preprocessing e.g.,Tokenization Match Tweet to Candidate Real- time Twitter data Throttle Sentiment Model Aggregate ... 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,...

Ngày tải lên: 16/03/2014, 20:20

... average number of visits to any other state (e.g., S 2 ) starting from any initial state, times the probability of using any rule in the final 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, many mining applications implement topologies of classifiers to jointly accomplish ... successive identification of stream data. Nevertheless, several key challenges remain for config- uring networks of classifiers in distributed stream mining systems. First, real- time stream mining applications...

Ngày tải lên: 21/06/2014, 19:20

... 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, d i–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...

Ngày tải lên: 21/06/2014, 19:20

... Article Two- Step Time of Arrival Estimation for Pulse-Based Ultra-Wideband Systems Sinan Gezici, 1 Zafer Sahinoglu, 2 Andreas F. Molisch, 2 Hisashi Kobayashi, 3 and H. Vincent Poor 3 1 Department of ... Dardari In 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 potential for very accurate positioning based on TOA estimation. However, it is challenging to realize very accurate positioning systems in practical...

Ngày tải lên: 21/06/2014, 22:20

... 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, ... re- quirements. As a result of these limitations, the system hastodealwithanefficient use of the computational resources. (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...

Ngày tải lên: 21/06/2014, 22:20

... Bissom, “Dy- namic integrated scheduling of hard real- time, soft real- time and non -real- time processes,” in Proceedings of the 24th IEEE International Real- Time Systems Symposium (RTSS ’03),pp. 396–407, ... In these systems, achieving end-to-end quality of service (QoS) re- quires integrating a range of real- time capabilities, such as QoS-enabled network protocols, real- time operating system scheduling ... use the operating system facilities, such as /proc file system in Linux/Unix operating systems and the system registry in Windows operating systems, to collect resource utilization metrics of that...

Ngày tải lên: 22/06/2014, 00:20

Ngày tải lên: 22/06/2014, 01:20

Ngày tải lên: 28/06/2014, 02:20

Ngày tải lên: 28/06/2014, 11:20

... use of cache memory and remote access times are roughly 10 times greater than 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 solution to the unconstrained growth of UNIX. During the...

Ngày tải lên: 12/09/2012, 15:05

Ngày tải lên: 12/05/2013, 10:21

Ngày tải lên: 05/09/2013, 10:15

... summation of y i n will be equal to the output y(n). This property is also called the superposition. A time- invariant system is a system that remains unchanged over time. A digital filter is time- invariant ... It also implies that the characteristics of a time- invariant filter will not change over time. A digital filter is causal if the output of the filter at time n 0 does not depend on the input applied ... This is impossible for any real physical filter. Linear, time- invariant filters are characterized by magnitude response, phase response, stability, rise time, settling time, and overshoot. Magnitude...

Ngày tải lên: 23/10/2013, 22:15