Montgomery multipliers perform modular multiplication of two integers without trial division. They are often used in implementation of RSA algorithm which demands fast modular multiplication. This ...paper describes design and FPGA implementation of two architectures 16 bit Montgomery multipliers: fully systolic and parallel. Modules of multipliers are designed in VHDL with parameters easy to change and implemented in FPGA chip from Xilinx Virtex-4 family.
Industrial Wireless Sensor Network (WSN) used for supervising of high power transformer cooling system is presented in the paper. Due to the fact that in the thermal power plant where industrial ...prototype is installed is very noisy environment, a lot of problems should be solved in order to obtain high reliability and accuracy of the system. Results of the analysis presented in paper are obtained from the real thermal power plant where WSN system control cooling systems of 100MVA and 210MVA generator power transformers.
A generalized low-density parity check code (GLDPC) is a low-density parity check code in which the constraint nodes of the code graph are block codes, rather than single parity checks. In this ...paper, we study GLDPC codes which have BCH or Reed-Solomon codes as subcodes. The performance of the proposed scheme is investigated on a BEC and BSC for infinite and finite code lengths. The analysis shows that the performance of the scheme on a BEC is poor compared to that of LDPC codes. However, the performance on a BSC is competitive to that of LDPC codes. Furthermore, results of the finite length analysis on a BEC can be used under certain conditions as a tight lower bound on the performance of the scheme on a BSC.
At present, optimal coding for a noiseless digital channel requires solving a large linear programming problem. Much simpler procedures gives codes, resembling Shannon's and Huffman's, that are found ...close to optimal in tests with typical sources and channels.
At present, optimal coding for a noiseless digital channel requires solving a large linear programming problem. Much simpler procedures gives codes, resembling Shannon's and Huffman's, that are found ...close to optimal in tests with typical sources and channels.
We analyze the evolution of an electromagnetic field inside a double cavity when the difference in length between the two cavities is changed, e.g. by translating the common mirror. We find that this ...allows photons to be moved deterministically from one cavity to the other. We are able to obtain the conditions for adiabatic transfer by first mapping the Maxwell wave equation for the electric field onto a Schroedinger-like wave equation, and then using the Landau-Zener result for the transition probability at an avoided crossing. Our analysis reveals that this mapping only rigorously holds when the two cavities are weakly coupled (i.e. in the regime of a highly reflective common mirror), and that, generally speaking, care is required when attempting a hamiltonian description of cavity electrodynamics with time-dependent boundary conditions.
On the smonitoza of weak acid reaction, well provided with phosphorus, nitrogen and potassium with low content of boron and low to medium content of zinc, an investigation was carried out into the ...effect of zinc and boron (applied by fertilization) on the yield of maize grain and sugar beet root. On the basis of the results obtained, the following can be concluded: 1) Zn in the amount of 10 kg/ha of zinc sulphate in the soil with high content of accessible phosphorus increases the yield of maize grain in the fertilization variant NPK + Zn by 3.1% while in the variant NPK + Zn + B by 4.7%; 2) Boron has no effect upon the increase of maize grain yield; 3) Zn has no effect upon the increase of yield of sugar beet root; 4) Boron in the form of borax, in the amount of 15 kg/ha and the fertilization variant NPK + Zn + B increases the yield of sugar beet by 6.3%.
