This article introduces a new variant on the popular optimization method, simulated annealing, herein called modified discrete-state simulated annealing. A guide in practical implementation of simulated tempering is also provided. The algorithms are tested in the design of an ideal collector for a travelling wave tube amplifier. keywords: simulated annealing, simulated tempering, travelling wav...

The microstructure characterization of tempered nanocrystalline bainitic steel is investigated in the present study. It is found that two types of plastic relaxation, dislocation debris and nanotwin, occurs in the displacive transformation due to relatively low transformation temperature and high carbon content. Because most carbon atoms trap in the dislocation, high dislocation density can be ...

a series of tialon coatings were synthesized in a gaseous mixture of argon, nitrogen and oxygen by cathodic arc evaporation method using a ti–al mosaic target. oxidation of coatings was carried out by heating the coated samples at the temperatures of 500, 600, 700, and 800°c for 1 h in air atmosphere. it was found that heat treatment changed the microstructure and composition of the coating. th...

reaction constants and heat release during thermophilic aerobic digestion of typical secondary and mixed sludges were determined. maximum reaction constant, determined by measuring the amounts of biodegradable volatile suspended solids (bvss) removed, occurred in the temperature range of 55-60 ºc. measurement of heat releases were carried out, at the same range, by the aid of a temperature prog...

In the present study, a modified H13 hot-work tool steel (M-H13) was fabricated by laser beam powder bed fusion (LB-PBF). The effect of two types post processing, direct tempering from as-built condition (DT) and conventional quenching followed (QT), on microstructure mechanical properties evaluated. typical in QT tempered martensite with carbides along lath boundaries. DT condition, melt pool ...

the effect of secondary steelmaking processes such as desulphurization, removal of inclusions and vacuumdegassing followed by hot forging and hardening heat treatment on the microstructure and mechanical properties of a hot-work w500 tool steel have been studied in details. in order to follow the progress of secondary steel making, the content of impurity elements such as s, p, o, h and n were ...

Tail estimates are developed for power law probability distributions with exponential tempering using a conditional maximum likelihood approach based on the upper order statistics. The method is demonstrated on simulated data from a tempered stable distribution, and for several data sets from geophysics and finance that show a power law probability tail with some tempering.

The effect of NiAl-type nanoparticles on the austenite stability was investigated during quenching-partitioning-tempering (QPT) processes in a cold rolled medium-manganese steel. A good combination ductility (total elongation: 37.9%) and strength (yield strength: 995 MPa/ultimate tensile 1260 MPa) is obtained after first step partitioning treatment at 630°C/1 h (P630) due to appropriate multipl...

in the present study, the capability of accumulative roll bonding (arb) and subsequent heat-treatment to fabricate solid solution from a multilayered cu/zn/al was investigated. two post-heat treatment (one-step and two-step) routes were proposed. in the first, the arb processed material was heated to 800 c for 5:30 hours and allowed to cool slowly in a furnace (one-step route). in the second (t...

Restricted Boltzmann Machines (RBMs) are one of the fundamental building blocks of deep learning. Approximate maximum likelihood training of RBMs typically necessitates sampling from these models. In many training scenarios, computationally efficient Gibbs sampling procedures are crippled by poor mixing. In this work we propose a novel method of sampling from Boltzmann machines that demonstrate...