共查询到20条相似文献,搜索用时 15 毫秒
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The fallout for conflict resolution professionals from the terrorist attacks of Sept. 11, 2001, strikes at the core of their existence: What do they do? What do they provide? Maria R. Volpe and Staci Strobl, of New York, have been looking broadly at the question of “deliverables” since 9/11. They discuss the business ADR aspects of that research, and provide lessons the profession should have learned. 相似文献
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《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1984,72(11):1434-1444
In a brief 20 years the number of satellites in the geosynchronous and geostationary orbits have increased by enormous bounds. Far more than Arthur C. Clarke, himself, could have anticipated two decades ago. This paper lists those satellites in geographical order, starting with the longitude of Greenwich and proceeding eastward, and the second table starting at Greenwich and going westward. The potential for additional growth in the number of geosynchronous and geostationary satellites still exists for tomorrow through new technologies being designed today. 相似文献
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Tripp J.L. Gokhale M.B. Hansson A.. 《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》2008,16(1):66-74
Scientific application kernels mapped to reconfigurable hardware have been reported to have 10times to 100times speedup over equivalent software. These promising results suggest that reconfigurable logic might offer significant speedup on applications in science and engineering. To accurately assess the benefit of hardware acceleration on scientific applications, however, it is necessary to consider the entire application including software components as well as the accelerated kernels. Aspects to be considered include alternative methods of hardware/software partitioning, communications costs, and opportunities for concurrent computation between software and hardware. Analysis of these factors is beyond the scope of current automatic parallelizing compilers. In this paper, a case study is presented in which a simulation of metropolitan road traffic networks is mapped onto a reconfigurable supercomputer, the Cray XD1. Five different methods are presented for mapping the application onto the combined hardware/software system. An approach for approximating the performance of each method is derived through analytic equations. Our results, both analytically and empirically, show that key predictors of performance (which are often not considered in reported speedup of kernel operations) are not necessarily maximum parallelism, but must account for the fraction of the problem that runs on the reconfigurable logic and the amount data flow between software and hardware. 相似文献
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David Snellen 《International Journal of Network Management》1992,2(4):222-226
In the previous articles on DECnet/OSI the focus has been on the technical aspects of Digital's implementation, alias Advantage Networks. The openness of Advantage Networks is both good and bad. It's good because you have the freedom to mix and match network devices to fit your specific needs. It's bad because a heterogeneous network environment will be very difficult to manage. In this article the discussion is on Digital's concept of managing a DECnet/OSI network management. 相似文献
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J. G. Simmons 《Solid-state electronics》1984,27(12):1131-1139
Analytic expressions describing electron and hole current flow in the metal/tunnel—oxide/n-silicon structure are derived. In the particular approach that is taken, the tunneling barrier presented by the SiO2 layer is treated using a “thick-oxide” MOS model; i.e. a trapezoidal tunneling barrier is used. Rather than assume a constant tunneling probability, the dependence of the tunneling barrier on applied bias and on the minority carrier density at the semiconductor surface is also included. Calculations based on the resultant equations are found to be in good agreement with experimental observations, and to correctly predict the “current-multiplication” effect that occurs under conditions of minority carrier injection to the Si---SiO2 interface [1].
The derived equations are used to simulate device behaviour under various experimental conditions, including the effects of minority carrier injection, non-zero flatband voltage, and changes in substrate doping concentration and temperature. In addition, device parameters such as barrier height and carrier effective mass are also investigated with regard to their effect on the resultant electron and hole tunneling currents. 相似文献
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J. L. Vanhove C. Noeldeke 《International Journal of Satellite Communications and Networking》1988,6(2):119-126
The use of optical communications for the high-data-rate links of the future European Data Relay System (EDRS) is receiving much attention. To confirm the feasibility of such communications links, an experimental system (SILEX) consisting of three satellites (two in geostationary orbit and one in low earth orbit) is planned for 1992 or 1993 to demonstrate both inter-orbit link (IOL) and intersatellite link (ISL) capabilities. A detailed feasibility study was performed from January to July 1987 under a European Space Agency (ESA) contract with Matra (France) as prime contractor, ANT (West Germany), Telespazio and Selenia Spazio (Italy) as subcontractors, and contributions from Berlin (France) and Dornier (West Germany). The system is based on GaAlAs semiconductor technology (0.8 μm) with silicon avalanche photodiodes (APDs) as detectors and arrays of charge-coupled devices (CCDs) for both acquisition and tracking sensors. The design will allow wavelength division multiplexing (WDM) and high-data-rate transmission to be demonstrated. The expected data rates are 120 Mb/s duplex for ISL, 1 Mb/s on the IOL forward link (GEO→LEO) and two to four simultaneous 60 or 120 Mb/s channels on the IOL return link (LEO→GEO). 相似文献
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《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》2009,97(11):1856-1863
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Network outsourcing is an alternative which through advanced technologies, standardization and a close partnership between the client corporation and provider, facilitates an effective and economical means of meeting present and future needs of various corporate user communities. Solutions typically consist of a wide array of services ranging from full operation of the network which includes assumption of assets and personnel to responsibility for various segments of the network such as Help Desk or Vendor Liaison functions. 相似文献
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Jesper Nilausen 《International Journal of Network Management》1995,5(5):249-256
This first article in a series on managing APPN Networks briefly introduces a relatively new networking architecture. Both traditional hierarchical SNA Networks and modern distributed Client/Server environments highly benefit from utilizing APPN functionality in their network configurations. APPN actually grew up in an environment which combines these two worlds: The IBM midrange computer environment based on AS/400 machines. APPN is part of IBM SNA (Systems Network Architecture) and many abbreviations in this series of articles actually are commonly used SNA terms. 相似文献
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Jesper Nilausen 《International Journal of Network Management》1996,6(3):170-176
In this second article in the series on managing APPN networks we will go through several APPN communications scenarios and analyse how the APPN protocol works when resources are found, routes are selected and communications sessions are established and maintained. 相似文献
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《Circuits and Systems II: Express Briefs, IEEE Transactions on》2008,55(9):887-891
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Changjian Gao Hammerstrom D. 《IEEE transactions on circuits and systems. I, Regular papers》2007,54(11):2502-2515
Here we introduce a highly simplified model of the neocortex based on spiking neurons, and then investigate various mappings of this model to the CMOL CrossNet nanogrid nanoarchitecture. The performance/price is estimated for several architectural configurations both with and without nanoscale circuits. In this analysis we explore the time multiplexing of computational hardware for a pulse-based variation of the model. Our analysis demonstrates that the mixed-signal CMOL implementation has the best performance/price in both nonspiking and spiking neural models. However, these circuits also have serious power density issues when interfacing the nanowire crossbars to analog CMOS circuits. Although the results presented here are based on biologically based computation, the use of pulse-based data representation for nanoscale circuits has much potential as a general architectural technique for a range of nanocircuit implementation. 相似文献
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Stephen B. Goldberg 《Alternatives to the High Cost of Litigation》2007,25(9):145-150
There's more that parties can do to help themselves in mediation. Veteran Evanston, Ill., neutral Stephen B. Goldberg describes how parties can work more effectively with the neutrals they hire to help them close cases and deals 相似文献
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Labarre D. Grivel E. Najim M. Christov N. 《Signal Processing, IEEE Transactions on》2007,55(11):5195-5208
This paper deals with the joint signal and parameter estimation for linear state-space models. An efficient solution to this problem can be obtained by using a recursive instrumental variable technique based on two dual Kalman filters. In that case, the driving process and the observation noise in the state-space representation for each filter must be white with known variances. These conditions, however, are too strong to be always satisfied in real cases. To relax them, we propose a new approach based on two dual Hinfin filters. Once a new observation of the disturbed signal is available, the first Hinfin algorithm uses the latest estimated parameters to estimate the signal, while the second Hinfin algorithm uses the estimated signal to update the parameters. In addition, as the Hinfin filter behavior depends on the choice of various weights, we present a way to recursively tune them. This approach is then studied in the following cases: (1) consistent estimation of the AR parameters from noisy observations and (2) speech enhancement, where no a priori model of the additive noise is required for the proposed approach. In each case, a comparative study with existing methods is carried out to analyze the relevance of our solution. 相似文献
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《Advanced Packaging, IEEE Transactions on》2009,32(3):650-656
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