Journal of Research of the National Bureau of Standards

Topics: aggregated Markov process, channel gating kinetics.

Dynamic Spectrum Access (DSA) is the new paradigm to access the unused spectrum at a given time. When designated user arrived on its licensed spectrum, a user will be hopped to the new vacant spectrum band in the white space. A Markov Chain (MC)is a stochastic model describing a sequence of possible events in which the probability of each event depends only on the state attained in the previous event. In this paper, we considered the dynamic spectrum access as a Markov Chain. We correlated DSA...

Topics: Cognitive Radio, Dynamic Spectrum Access & Markov Process

Topics: Mathematics, unrecognizability, Fibonacci machine, Markov process, automata, regular set

This thesis proposes an analytical model to test various assumptions about conventional/chemical warfare. A unit's status in conventional/chemical combat is modeled as states in a semi-Markov chain with transient and absorbing states. The effects of differing chemical threat levels, availability of decontamination assets and assumed personnel degradation rates on expected unit life and capabilities are tested. The model results indicate a possible optimal mix of conventional and chemical...

Topics: chemical warfare, semi-Markov process, decon, degradation, chemical threat

Journal of Research of the National Bureau of Standards

Topics: Information theory, Markov process, probability theory, ring theory, stochastic process

The availability analysis of the refining system in a sugar plant is explored in the present paper. There are various subsystems which are complex in nature and are repairable. In a sugar plant, there is (i) feeding system (ii) refining system (iii) evaporation system (iv)crystallization system. one of the important systems is refining system. It has (i) clarifier filter units, (ii)Sulphonation units (iii) heating units. If anyone of these units fails, overall refining system fails. The...

Topics: Steady State Availability, Refining System, Markov Process Maintenance Strategy, & Mathematical...

Dynamic spectrum access is a paradigm used to access the spectrum dynamically. A hidden Markov model (HMM) is one in which you observe a sequence of emissions, but do not know the sequence of states the model went through to generate the emissions. Analysis of hidden Markov models seeks to recover the sequence of states from the observed data. In this paper, we estimate the occupancy state of channels using hidden Markov process. Using Viterbi algorithm, we generate the most likely states and...

Topics: Baum-Welch algorithm, Cognitive radio network, Dynamic spectrum access, Hidden Markov process,...

In this paper two units cold standby system has been discussed with the facility that server inspect the failed unit before repair/replacement of the unit and server may allow to take refreshment whenever needed. The operative unit may fail directly from normal mode and the cold standby unit may be failed owing to remain unused for a longer period of time. There is single server who serves the dual purpose of inspection and repair immediately whenever required. Also, after having refreshment...

Topics: Profit Analysis, Cold-standby, regenerative point, steady state and Semi-Markov process, inspection...

This paper presents an optimal bandwidth allocation method for a networked control system (NCS) which includes time-driven sensor, event-driven controller and random channels. A hidden markov model (HMM) with a discretized state space is formulated for the random traffic to predict the network states using a suitable data window. Network bandwidth is allocated based on the predicted traffic state subject to bounds on the deterministic traffic that guarantee acceptable NCS performance and do not...

Topics: Bandwidth allocation, Hidden markov process, Network congestion, Networked control systems,...

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Jun 19, 2010
06/10

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Derman, C.; Veinott, A. F., Jr

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Optimal rules for controlling Markovian decision processes applied to solutions for problems dealing with ordering inventory supplies

Topics: DECISION MAKING, OPTIMAL CONTROL, INVENTORIES, INVENTORY CONTROLS, MARKOV PROCESSES, OPTIMAL...

Much of the enlisted supply research to date focuses on the transition of individuals from high school to the military. Little is known of those who have chosen other options, such as further education, employment, or to remain out of the labor force completely. With the decline of the 17-21 year old male population, research must be directed towards the entire labor market. This research uses data from the National Longitudinal Survey of Youth to estimate the transition probabilities among...

Topics: Management, transition probabilities, transition rates, time stability test, time independence...

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Jun 20, 2010
06/10

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NON

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Optimal control in bounded phase-coordinate processes and for antenna pointing direction subject to random disturbances

Topics: ATTITUDE CONTROL, DIRECTIONAL ANTENNA, MARKOV PROCESS, OPTIMAL CONTROL, RANDOM VIBRATION,...

Bell System Technical Journal, 42: 3. May 1963 pp 567-607. A "Thermodynamic" Theory of Traffic in Connecting Networks. (Benes, V.E.)

Topics: matrix, statistical, equilibrium, rate, connecting, vector, theory, markov, traffic, entropy,...

Bell System Technical Journal, 56: 9. November 1977 pp 1743-1768. Discrete-Time Single Server Queues with Correlated Inputs . (Gopinath, B.; Morrison, J.A.)

Topics: markov, finite, nonnegative, equations, queueing, inputs, correlated, lim, generating, sequence,...

Bell System Technical Journal, 51: 3. March 1972 pp 629-653. On Maxentropic Discrete Stationary Processes. (Slepian, D.)

Topics: markov, stationary, covariance, process, values, maxentropic, entropy, discrete, log, equations,...

The objective of this research has been to characterize in terms of spectral representations and interval distributions the univariate point process resulting from the superposition of a finite number of independent, identically distributed renewal processes with either Erlang or hyperexponential interval distributions. A corollary to the direct line of inquiry has involved a broad class of univariate point processes known as semi-Markov generated point processes . A semi-Markov generated point...

Topics: spectrum, spectrum of intervals, spectrum of counts, point processes, superposition, Erlang renewal...