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Evaluation of caches and cache coherencySehat, Kamiar January 1992 (has links)
No description available.
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Modelling of communication protocolsWei, K-K. January 1986 (has links)
No description available.
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Replication in distributed management systemsKotsakis, Evangelos Grigorios January 1998 (has links)
No description available.
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Méthodes et architectures basées sur la redondance modulaire pour circuits combinatoires tolérants aux fautes / Methods and architectures based on modular redundancy for fault-tolerant combinational circuitsBan, Tian 04 September 2012 (has links)
Dans cette thèse, nous nous intéressons à la recherche d’architectures fiables pour les circuits logiques. Par ”fiable”, nous entendons des architectures permettant le masquage des fautes et les rendant de ce fait ”tolérantes" à ces fautes. Les solutions pour la tolérance aux fautes sont basées sur la redondance, d’où le surcoût qui y est associé. La redondance peut être mise en oeuvre de différentes manières : statique ou dynamique, spatiale ou temporelle. Nous menons cette recherche en essayant de minimiser tant que possible le surcoût matériel engendré par le mécanisme de tolérance aux fautes. Le travail porte principalement sur les solutions de redondance modulaire, mais certaines études développées sont beaucoup plus générales. / In this thesis, we mainly take into account the representative technique Triple Module Redundancy (TMR) as the reliability improvement technique. A voter is an necessary element in this kind of fault-tolerant architectures. The importance of reliability in majority voter is due to its application in both conventional fault-tolerant design and novel nanoelectronic systems. The property of a voter is therefore a bottleneck since it directly determines the whole performance of a redundant fault-tolerant digital IP (such as a TMR configuration). Obviously, the efficacy of TMR is to increase the reliability of digital IP. However, TMR sometimes could result in worse reliability than a simplex function module could. A better understanding of functional and signal reliability characteristics of a 3-input majority voter (majority voting in TMR) is studied. We analyze them by utilizing signal probability and boolean difference. It is well known that the acquisition of output signal probabilities is much easier compared with the obtention of output reliability. The results derived in this thesis proclaim the signal probability requirements for inputs of majority voter, and thereby reveal the conditions that TMR technique requires. This study shows the critical importance of error characteristics of majority voter, as used in fault-tolerant designs. As the flawlessness of majority voter in TMR is not true, we also proposed a fault-tolerant and simple 2-level majority voter structure for TMR. This alternative architecture for majority voter is useful in TMR schemes. The proposed solution is robust to single fault and exceeds those previous ones in terms of reliability.
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Implementation and Analysis of the Entity Component System ArchitectureHarris, Shawn M 01 March 2022 (has links) (PDF)
The entity component system architecture (ECSA) is a data-oriented composition pattern and a data-driven design pattern. Data-oriented software takes into consideration generalized knowledge of hardware. Data-driven design is a methodology used to replace inflexible code with reusable components that can be added, deleted, or modified in interactive systems and games. This thesis explores the ECSA and its alternatives and their strengths and weaknesses. The paper details the creation of an ECSA and benchmarks its performance against object-oriented architectures. The hypothesis of this thesis is that the ECSA has CPU cache performance advantages over object-oriented architectures as tested by multiple benchmarks. The results suggest that the ECSA provides superior CPU performance. These results could be valuable for interactive game developers to get higher frame rates out of their games, MMORPG server developers to process millions of entities per second, and mobile developers to create battery-efficient apps.
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Open Systems Architecture in a COTS environmentStottlemyer, Alan R., Hassett, Kevin M. 10 1900 (has links)
International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California / A distributed architecture framework has been developed for NASA at Goddard Space
Flight Center (GSFC) as the basis for developing an extended series of space mission
support data systems. The architecture is designed to include both mission development
and operations. It specifically addresses the problems of standardizing a framework for
which commercial off-the-shelf (COTS) applications and infrastructure are expected to
provide most of the components of the systems. The resulting distributed architecture is
developed based on a combination of a layered architecture, and carefully selected open
standards. The layering provides the needed flexibility in mission design to support the
wide variability of mission requirements. The standards are selected to address the most
important interfaces, while not over constraining the implementation options.
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REFERENCE ARCHITECTURE FOR SPACE DATA SYSTEMSShames, Peter, Yamada, Takahiro 10 1900 (has links)
International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada / This paper introduces the Reference Architecture for Space Data Systems (RASDS) that is being
developed by CCSDS. RASDS uses five Views to describe architectures of space data systems.
These Views are derived from the viewpoints of the Reference Model of Open Distributed
Processing (RM-ODP), but they are slightly modified from the RM-ODP viewpoints so that they can
better represent the concerns of space data systems.
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800 Mbps TELEMETRY PROCESSING SYSTEMBishop, Jim, Welch, John 10 1900 (has links)
International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / Satellites are becoming more capable and complex, as such their downlink requirements are increasing. In addition, future satellite systems will be operating at Ka-band that provides ample bandwidth to support the increase in downlink rates up to 800 Mbps. This paper describes a new generation commercial solution that can support 800 Mbps telemetry processing for data reception, frame synchronization, time tagging, Reed-Solomon forward error correction, data routing, data storage, data playback for testing, networking, and Bit Error Rate (BER) Testing.
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Study on Architecture-Oriented Network Management ModelHuang, Hsin-Wei 16 January 2008 (has links)
In the past several years, the usage of network is getting more and more popular
and various types of network applications also have vigorous advancement. Because
the benefits which network applications produced obtain a lot of enterprise's attention,
each enterprise is eager to introduce the network to unify each kind of information
system, and expects to achieve the synthesis effect as well. At present, the network
system has been an indispensable infrastructure in the enterprise, but how to make it
effective becomes a tough issue in an enterprise¡¦s business plan.
In 1997, the International Standard Organization proposed the OSI Network
Management Model, is also named FCAPS Model, to apply on the data network.
FCAPS Model is mainly to define the functional scope of the network management
system. Though it is easy to understand, it does not have the deeper explanations how
to achieve these functions. Also, FCAPS fails to tell who should do what in a network
system. As a result of such deficiencies, the enterprise often doesn¡¦t know how to do
to apply FCAPS into the planning of a network management system.
This research develops a network management architecture description language
(NMADL) by using the concept of system architecture to construct an
architecture-oriented network management model (AONMM). AONMM is an
integrated model which consists of the viewpoint of structure and behavior. By
integrating the structure and behavior into one unity, it clearly and completely
describes the network management system. Furthermore, this research analyzes the
problems of FCAPS Model and compares it with AONMM to verify AONMM¡¦s
superiority. AONMM is a valuable referenced model for planning, analyzing and
designing network management systems.
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A Conceptual Framework for Specification of Network-Centric System ArchitecturesChurbanau, Dzmitry 26 May 2010 (has links)
Software-based system architecture has been recognized as a foundation laying out the underpinnings that are critically important for successful engineering of large-scale complex systems. In recent years, architecting has played a more crucial role in engineering network-centric system of systems. The software paradigm has been shifting from treating software as a product (SaaP) to treating software as a service (SaaS). SaaS is also referred to as the Cloud Computing, where the term "cloud" is used as a metaphor for "network".
As the complexity of the architecture of network-centric software-based system of systems has increased, the description of such architecture has posed significant technical challenges. The U.S. Department of Defense (DoD) has developed the DoD Architecture Framework [DoDAF 2009a, DoDAF 2009b] for describing system architectures. IEEE proposes a Recommended Practice for Architectural Description of Software-Intensive Systems [IEEE 2000]. SEI provides high-level guidelines for Documenting Software Architectures [Clements et al 2003]. However, all of the diagrams proposed by DoD, IEEE, and SEI are two-dimensional static graphical and textual representations that do not reveal the dynamic characteristics of a system architecture.
This thesis presents a conceptual framework (CF) for specifying the architecture of a network-centric software-based system of systems. The developed CF provides the beginning part of a larger research effort. The main goal of the overall research is to employ the automation-based software paradigm and to automatically generate a visual simulation model of a system architecture, with which experiments can be conducted to assess the dynamic characteristics of that architecture. The CF, developed in the research described herein, enables the automatic generation of a visual simulation model representing a system architecture. The proposed CF is evaluated in half a dozen case studies to demonstrate that it provides the necessary elements for automatic generation of a simulation model as the description of a complex system of systems architecture. / Master of Science
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