Advances in signal processing allow us to model the audio signal in terms of mathematical representation. Compressed audio signal are also important for low-bit-rate media in order to minimize transmission cost. Appli...
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Advances in signal processing allow us to model the audio signal in terms of mathematical representation. Compressed audio signal are also important for low-bit-rate media in order to minimize transmission cost. Applications such as movies on compact disc, audio conferencing, and digital television also require a good model for the audio compression. We present a model for compressed audio signal. By varying different modelling parameters, we obtain the simulation result of the proposed model of the audio coder. Simulation results found that it has a good compression Ssignal-to-noise ratio compared with NICAM, CD, and OCF coders.
The Convex SPP-1000 is the first commercial implementation of a new generation of scalable shared memory parallel computers with full cache coherence. It employs a hierarchical structure of processing communication an...
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The Convex SPP-1000 is the first commercial implementation of a new generation of scalable shared memory parallel computers with full cache coherence. It employs a hierarchical structure of processing communication and memory name-space management resources to provide a scalableNUMA environment. Ensembles of 8 HP PA-RISC7100 microprocessorsemploy an internal cross-bar switch and directory based cache coherence scheme to provide a tightly coupled *** to 16 processing ensembles are interconnected by a 4 ring network incorporating a full hardware implementation of the SCI protocol for a full system configuration of 128 processors. This paper presents the findings of a set of empirical studies using both synthetic test codes and full applications for the Earth and space sciences to characterize the performance properties of this new architecture. It is shown that overhead and latencies of global primitive mechanisms, while low in absolute time, are significantly more costly than similar functions local to an individual processor ensemble.
The case is made in this paper for encouraging the scientist to become familiar with architectural features of the. supercomputer in use. This is essential for a proper choice of an efficient computational procedure f...
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The case is made in this paper for encouraging the scientist to become familiar with architectural features of the. supercomputer in use. This is essential for a proper choice of an efficient computational procedure for a given problem, as demonstrated by matching two vectorized algorithms to the CDC CYBER 205 and its special features. The two problems reported here are the Monte Carlo method for lattice gauge theory calculations and the multigrid method for partial differential equation solvers, combined with the description of the relevant aspects of the CDC CYBER 205 architecture.
作者：
林元章代念祖陈美东张建中Beijing Observatory
Academia Sinica Institute of History of Natural Science
Academia Sinica Institute of Computing Technology
Academia Sinica? INTRODUCTION In this paper the aurora borealis data from 1535 to 1625 have been used to derive the period of reappearance of auroras. We reached the conclusion that the rate of solar rotation before the Maunder minimum was the same as the present one. This is in contradiction with the result obtained by Eddy et al.. At the same time we want to point out that our method can avoid various possible errors which mav arise in the
Ⅰ. INTRODUCTION In this paper the aurora borealis data from 1535 to 1625 have been used to derive the period of reappearance of auroras. We reached the conclusion that the rate of solar rotation before the Maunder mi...
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Ⅰ. INTRODUCTION In this paper the aurora borealis data from 1535 to 1625 have been used to derive the period of reappearance of auroras. We reached the conclusion that the rate of solar rotation before the Maunder minimum was the same as the present one. This is in contradiction with the result obtained by Eddy et al.. At the same time, we want to point out that our method can avoid various possible errors which mav arise in
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