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91.
This paper presents two algorithms for determining the most reliable paths of a communication network, taking into account both the reliabilities of nodes and links. A network is modeled by a linear graph. The first algorithm adapts a node labeling scheme; second is based on the shortest-path matrix algorithm. Both algorithms can be applied to oriented and nonoriented nonsymetric networks. The numerical examples confirm that both algorithms efficiently handle networks with hundreds of nodes and edges. The total amount of computation, expressed by the number of multiplications and comparisons, increases in the labeling procedure with the square of the number of nodes, and in the matrix method with the cube of the number of nodes. 相似文献
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Tatjana Stevanovic Francois‐X. Garneau France‐I. Jean Hlne Gagnon Dragica Vilotic Slobodan Petrovic Nenad Ruzic Andr Pichette 《Flavour and Fragrance Journal》2005,20(1):96-97
The chemical composition of the essential oil of the needles and twigs of dwarf pine (Pinus mugo Turra) growing wild in Serbia was investigated. The oil was analysed by GC/MS and the major constituents found were δ‐3‐carene (23.9%), α‐pinene (17.9%), β‐pinene (7.8%) and β‐phellandrene (7.2%). Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
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Ka Leong Lo Zhuo Chen Slavica Marinkovic Branka Vucetic 《Transactions on Emerging Telecommunications Technologies》2005,16(2):121-135
Information theoretic studies show that a multiple‐input‐multiple‐output (MIMO) system can achieve a much higher channel capacity than a single‐antenna system. The layered space‐time (LST) structures are able to attain a tight lower bound on the channel capacity. In this paper, three different LST architectures with low‐density parity‐check (LDPC) and convolutional constituent codes are investigated. An improved iterative parallel interference cancellation (PIC) method is applied, which provides a significant performance gain compared to the standard PIC. These three LST schemes are compared for various system configurations characterised by the number of transmit and receive antennas, fading types, detection techniques and constituent codes. It is shown that the PIC detector with statistical combining has a complexity of the standard PIC and achieves the minimum mean square error (MMSE) performance. Copyright © 2005 AEIT. 相似文献
96.
Concatenated codes consisting of trellis inner codes and Reed-Solomon outer codes are considered to achieve large coding gains with small bandwidth expansion in the presence of frequency-nonselective slow Rician fading. Both errors-only and errors-erasures decoding algorithms for outer codes are applied. New upper bounds on bit error probability performance in the presence of fading are obtained and compared with simulation results for zero channel memory. The effect of interleaving in eliminating channel memory is investigated. The performance gains that are achieved by the coding scheme relative to the reference uncoded systems are illustrated via some examples 相似文献
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Radovanović Slobodan Ranković Vesna Anđelković Vladimir Divac Dejan Milivojević Nikola 《Bulletin of Engineering Geology and the Environment》2018,77(3):1191-1202
Bulletin of Engineering Geology and the Environment - Knowledge of the deformation properties of the rock mass is essential for the stress–strain analysis of structures such as dams, tunnels,... 相似文献
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