The blanket time of a random walk on a graph G is the expected time until the proportion of time spent at each vertex approximates the stationary distribution. In 1996, Winkler and Zuckerman conjectured that the blanket time is of the same order as the cover time. Ding, Lee and Peres proved this conjecture in 2010 by relating both terms to the maximum of the Gaussian free field on G. We outline...

up flow anaerobic sludge blanket (uasb) reactors have been increasingly used for industrial wastewater treatment. because of existing problems in startup step of these reactors, in this research the startup of a uasb in pilot scale and room temperature condition was studied. the total height of uasb reactor was 270 cm and effective height was 240 cm. diameter of the reactor in lower part was 20...

The Advanced Power Extraction (APEX) program is exploring concepts for blanket designs that can enhance the potential of fusion while using both liquid and solid walls. In that context, an innovative blanket design of dry solid wall configuration, with potential for high neutron wall loading has been proposed. The blanket utilizes nanocomposited ferritic (NCF) steel structure (designated 12YWT)...

The neutron yield in a D-He reactor is much lower than that in a D-T reactor of equivalent power. Therefore, the rate of neutron damage and gas production in the first wall of D-He reactors is lower by more than an order of magnitude. Whereas different structural materials proposed for use in commercial fusion reactors will last the reactor lifetime of 30 full power years in a D-He reactor, fre...

This paper considers a Bayesian view for estimating a sub-network in a Markov random field. The sub-network corresponds to the Markov blanket of a set of query variables, where the set of potential neighbours here is big. We factorize the posterior such that the Markov blanket is conditionally independent of the network of the potential neighbours. By exploiting this blockwise decoupling, we de...

This paper summarizes the results from the engineering effort during Phase I of the ARIES-CS study, covering the different blanket configurations and maintenance schemes that were considered and assessed. The main design parameters are summarized and key issues are discussed including the impact of different physics configurations on the engineering choices. These results will be used as the ba...

The ARIES-AT blanket has been developed with the overall objective of achieving high performance while maintaining attractive safety features, simple design geometry, credible maintenance and fabrication processes, and reasonable design margins as an indication of reliability. The design is based on Pb–17Li as breeder and coolant and SiCf/SiC composite as structural material. This paper summari...

We analyzed the convergence properties of likelihood­ weighting algorithms on a two-level, multiply connected, belief-network representation of the QMR knowledge base of internal medicine. Specifically, on two difficult diagnostic cases, we examined the effects of Markov blanket scoring, importance sampling, and self-importance sampling, demonstrating that the Markov blanket scoring and self-im...

1 1. In troduc tion 1 2. Breeding Blanket Design and Materials 2 3. Tritium Breeding Requirements 8 4. Breeding Potential of Candidate Materials 14 4.1 Effects of Penetrations on T 15 4.2 Breeding in the Inboard Blanket 18 4.3 Fast and Thermal Systems 19 4.4 Neutron Multipliers 24 4.5 Conclusions on Breeding Potential 30 5. Sensitivity to Data Uncertainties 32 6. Recommended Effort 40 7. Nuclea...