With the increase of penetration rate distributed generation on distribution network side, access a large number prosumers makes trading information massive, and demand for more flexible power mechanism is also strengthened. Therefore, weak-centralized mode based blockchain proposed in this paper. Trading automatically stored form smart contracts. The centralized organization only manages conge...

Elliptic obstacle problems are formulated to find either superharmonic solutions or minimal surfaces that lie on or over the obstacles, by incorporating inequality constraints. In order to solve such problems effectively using finite difference (FD) methods, the article investigates simple iterative algorithms based on the successive over-relaxation (SOR) method. It introduces subgrid FD method...

*Correspondence: [email protected] 1School of Science, Xi’an Polytechnic University, Xi’an, Shaanxi 710048, China Full list of author information is available at the end of the article Abstract Some convergence conditions on successive over-relaxed (SOR) iterative method and symmetric SOR (SSOR) iterative method are proposed for non-Hermitian positive definite linear systems. Some examples are ...

Beta-blockers (class II antiarrhythmics) reduce sudden death and total mortality in patients with heart failure (strength of recommendation [SOR]: A, based on systematic reviews of randomized controlled trials). Amiodarone (class III) may reduce sudden death in heart failure (SOR: B, extrapolation from randomized controlled trials), but evidence is weak that it reduces total mortality, and it h...

Presents an image reconstruction method for positron-emission tomography (PET) based on a penalized, weighted least-squares (PWLS) objective. For PET measurements that are precorrected for accidental coincidences, the author argues statistically that a least-squares objective function is as appropriate, if not more so, than the popular Poisson likelihood objective. The author proposes a simple ...

This paper presents a noncontacting thermoelectric method that can be used to characterize the prevailing residual stress in shot-peened specimens. This novel method is based on magnetic detection of local thermoelectric currents in the compressed near-surface layer of metals when a temperature gradient is established throughout the specimen. Besides the primary residual stress effect, the ther...

The Multidimensional Knapsack/Covering Problem (KCP) is a 0–1 Integer Programming Problem containing both knapsack and weighted covering constraints, subsuming the well-known Multidimensional Knapsack Problem (MKP) and the Generalized (weighted) Covering Problem. We propose an Alternating Control Tree Search (ACT) method for these problems that iteratively transfers control between the followin...

In this paper, we address the problem of the efficient parallel exploitation of different types of computing devices inside a single machine, to solve a scientific problem. As a first step, we apply our scheme to the Jacobi relaxation. Despite its simplicity, it is a good example of iterative process for scientific simulation. Then, we evaluate and analyze the performance of our parallel implem...

While finding the exact solution for the MAP inference problem is intractable for many real-world tasks, MAP LP relaxations have been shown to be very effective in practice. However, the most efficient methods that perform block coordinate descent can get stuck in sub-optimal points as they are not globally convergent. In this work we propose to augment these algorithms with an -descent approac...

The in-plane (plane stress) fracture toughness of two polyester (PET, PETG) sheets were assessed using the essential work of fracture (EWF) method after thermal and hygrothermal aging performed just below glass temperature. This ensured that physical aging takes place. On the aged sheets the yield stress (σy), enthalpy relaxation (ΔH) and EWF parameters were determined. It was observed that the...