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In order to improve the practice in operation and maintenance of high voltage (HV) cable circuit and localize short circuit fault accurately and in a timely manner, this paper proposes a fault localization method based on the monitoring of sheath current in cross-bonded HV cable circuits. The fault current flow can be identified by analyzing the fundamental component of sheath current, which can be...
More and more on-line experiments have been done in E-Commerce in order to understand the behavior of users or customers and then apply the data analysis technique to provide business guidance. One of the techniques is A/B testing. However, there is not clear guidance on the sample size in order for us to have valuable, trustable discovery. The purpose of this work is to find out a way to group customers...
The beer recipe optimization is a effective way for reducing the brewing enterprises. Because the recipe optimization belongs to NP-hard problem, It is difficult to obtain the global optimal solution for the traditional optimization algorithm. Though ant colony optimization (ACO) is suitable for solving the combinatorial optimization problems, it still has weakness in solving continuous optimization...
With the promotion of the smart city and the development of smart distribution network, intelligent management of the vast, expensive power cable network is attached with growing significance. This paper proposes a novel, intelligent cable management system, of which the aim is to improve the operational and maintenance effectiveness and to support smart cities. Firstly, it discusses the challenges...
The movement behaviour of zebrafish (Danio rerio) schools was observed in response to treatment with copper at a 24 h half-lethal concentration. The behavioural characteristic parameters, which were continuously recorded into a SQL (Structured Query Language) Server database by a digital image processing system both before and after the treatment, had significant changes. Subsequently, the Adaboost...
Since breaking transmission lines has thousands of combinations for large power grid, it's difficult to find the best combination to decrease short circuit level in a short time. Sensitivity relationship between transmission line outage and impedance change is aquatinted firstly in this paper, then preliminary combination schemes of transmission line outage is selected according to the sensitivity...
The diffusion process is a significant factor in high-voltage circuit breaker arcs simulation, due to the great influence of metal vapours and wall ablation. The combined diffusion coefficient method has been demonstrated as an accurate and simple treatment of diffusion process in two-gas mixtures. However, in many cases, the high voltage arc plasma consists of more than two gases. Recently, an extension...
To solve chemical problems with variable and nonrigid constraints, a method based on particle swarm optimization (PSO) algorithm was presented. By mathematical analysis and transform, the variable constraints were regard as an item to be optimized. Then the item multiplied by penalty and combined with the primary objective function. So the primary problem was transferred to the multi-objective function,...
Since the proximate source of dose to the cells of the bronchial epithelium is caused by the airborne decay products of radon and thoron, it is in some situations more practical to remove the daughter products from the air in the form of filtration with pump and High Efficiency Particulate Air (HEPA) filters. However, the filtration process induced some complex influence on indoor radon, thoron concentration...
Aiming at the disadvantage (premature convergence) of the Ant Colony Optimization (ACO), a mechanism called global random-proportional rule (GRP) is presented. The mechanism adjusts the transition probability proportionally and facilitates the exploration by increasing the probability of selecting solution components with low pheromone trail. It can avoid premature convergence of ACO and exploit more...
A general dynamical fuzzy neural networks model - fuzzy Hopfield networks with threshold is developed, which is based on the fuzzy operator composition of max(v) and weakly continuous T-norms. It is shown that the model is global stable with the Hamming distance, and its equilibrium point (attractor) is Lyapunov stable.
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