Two-dimensional pattern matching by two-dimensional on-line tessellation acceptors

By reducing an array matching problem to a string matching problem in a natural way, it is shown that efficient string matching algorithms may be applied to arrays. In this paper, based on the ideas due to Baker, an application of the two-dimensional on-line tessellation acceptor (2-dota) is presented for very rapid on-line detection of occurrences of a fixed set of keyarrays as embedded subarrays in a text array. The main part of the algorithm described in this paper consists of constructing two finite state pattern (string) matching machines from the keyarrays. By combining these two finite state pattern matching machines, we construct the 2-dota which, given an m × n text array, solves the two-dimensional pattern matching problem in m + n?1 steps.     

Brune-section simulation circuits using two operational amplifiers

New Brune-section simulation circuits using two operational amplifiers are proposed. A first-order allpass filter is constructed as an application using one of these simulation circuits. The measured response coincided closely with the calculated one in the frequency range less than about 10kHz.     

Distributed against centralised crossbar function for realising bank-based multiport memories

The two extreme functionally equivalent possibilities of distributed or centralised crossbar function for realising a bank-based multiport memory are compared on the basis of required global signal and transistor numbers. With respect to both measures, the distributed crossbar function is found to be the better choice for practically relevant multiport-memory configurations.     

Nonlinear separation modeling and control of a boiler system by use of actual data of a thermal power plant

Construction of a reasonable controller and automatic determination of the BIR for a boiler system in a thermal power plant are investigated based on the nonlinear separation control method by using actual data of the thermal power plant. Nonlinear separation control consists of nonlinear static compensation and linear dynamics compensation, applied independently. The effectiveness of the proposed method is verified by numerical simulation studies. © 2003 Wiley Periodicals, Inc. Electr Eng Jpn, 144(4): 53–62, 2003; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10179     

Dagger-Sampling Monte Carlo For System Unavailability Evaluation

Reliability problems usually result in rare-event simulations, and hence direct Monte Carlo methods are extremely wasteful of computer time. This paper presents a new application of ``dagger-sampling', for calculating the system unavailability of a large complicated system represented by a coherent fault tree. Since a small number of uniform random numbers generate a number of trials, dagger-sampling appreciably reduces computation time, and hence a large number of trials become possible for the rare-event problems. Further, dagger-sampling decreases the variance of the Monte Carlo estimator because it generates negatively correlated samples.     

A Method of Study of Radioactive Tracer Kinetics

This paper presents an approach to the problem of estimating the number of exponential functions and the pertinent parameters in the output of a radioactive tracer kinetic process. In particular, application of a criterion called an information theoretical criterion (AIC) for the estimation of the number of exponential functions is proposed; AIC was introduced by Akaike for the estimation of the order of linear dynamical systems and has been successfully applied for statistical model identification in a wide range of fields. Also, the maximum likelihood method was applied in order to evaluate AIC and to estimate decay constants and coefficients.     

Transformation studies and mechanical properties of melt-quenched amorphous titanium-silicon alloys

The formation, stability and decomposition characteristics of the amorphous phase in binary titanium-silicon alloys rapidly quenched from the molten state have been investigated. Electron microscopy and diffraction coupled with X-ray diffraction techniques suggested that the amorphous phase could be obtained in alloys containing 15 to 20 at% silicon. The transformation of the amorphous phase to the equilibrium phases took place in two stages. A metastable b c c titanium solid solution, containing silicon in excess of the equilibrium value, formed initially, followed by the precipitation of the Ti₅Si₃ intermetallic compound. Microstructural features at various stages of decomposition have been described and interpreted in terms of the constitution of the alloys. Mechanical properties of the amorphous alloys have also been investigated.     

Expression of Pax5 gene in human haematopoietic cells and tissues: comparison with immunodeficient donors

We have studied the effects of moguisteine, a new non-narcotic, peripherally acting antitussive compound, on tracheobronchial rapidly adapting irritant receptors (RARs). Experiments were carried out on dogs anaesthetized with a mixture of urethane and alpha-chloralose, paralysed with gallamine, vagotomized and artificially ventilated. Single unit action potentials identified as originating from tracheobronchial RARs were recorded from the peripheral cut end of the right vagus nerve. The activity of these receptors was recorded together with oesophageal pressure and arterial blood pressure. Fourteen RARs were challenged with moguisteine (200 microg x kg[-1] i.v.) in 0.4% dimethylsulphoxide (DMSO) or 0.4% DMSO alone (vehicle). Receptor activity was recorded before (control) and at 2, 5, 10, 15, 20, 30 and 45 min after administration of the challenging compounds. When the results at intervals of 2, 5, 10, 15 and 20 min were averaged for each dog, it was found that moguisteine decreased the mean activity of the 14 receptors to 75% of the control value (p<0.05); the greatest inhibition occurred 10-20 min after moguisteine administration. DMSO did not significantly affect the activity of these endings. Oesophageal pressure, arterial blood pressure and cardiac frequency were not altered during the experimental procedures. The overall results indicate the presence of an inhibitory effect of moguisteine on rapidly adapting irritant receptors that could account for the antitussigenic effect of this compound.