An optical system for learning neural networks with a 2-D architecture was constructed using a Selfoc microlens array. Using this system, we achieved pattern recognition of typed alphabet characters detected directly ...
详细信息
Reducing the power loss of medium-voltage distribution network by adjusting the operation mode of distribution network is a key step towards reducing the power grid energy loss. This paper presents a loss reduction, t...
详细信息
The aim of this master thesis is to study algorithms for automatically tuning antenna parameters to improve the performance of the radio access part of a telecommunication network and user experience. There are four d...
详细信息
The aim of this master thesis is to study algorithms for automatically tuning antenna parameters to improve the performance of the radio access part of a telecommunication network and user experience. There are four dierent optimization algorithms, Stepwise Minimization algorithm, random search algorithm, Modied Steepest Descent algorithm and Multi-Objective Genetic algorithm to be applied to a model of a radio access network. The performances of all algorithms will be evaluated in this thesis. Moreover, a graphical user interface which is developed to facilitate the antenna tuning simulations will also be presented in the appendix of the report
For convenience to measure and automatically identify the synchronous machine parameters, a new microprocessor-based parameter identifier of synchronous machines is developed and described in this paper. The hardware ...
详细信息
ISBN:
(纸本)0780330269
For convenience to measure and automatically identify the synchronous machine parameters, a new microprocessor-based parameter identifier of synchronous machines is developed and described in this paper. The hardware of this identifier consists of three parts: signal metering part, identification part and output printer/liquid crystal display. Park's two axis model and random search algorithm are input to a 8098-microprocessor as the second part which is linked to a printer for results output. Either the DC decay test, or the low voltage AC standstill test presented in this paper may be used. When signals are measured and input to the identifier, the identification system automatically gives out all Park's parameters at the d/q axis. Field tests have been carried out for generators rated at (50-300) MVA at Baishan Hydro-Power Station and for some machines at other power stations in China. Results show that the identifier can effectively and quickly identify all Park's parameters of large synchronous machines.
In this paper, we propose a robust Kalman filter and smoother for the errors-invariables (EIV) state space model subject to observation noise with outliers. We introduce the EIV problem with outliers and then we prese...
详细信息
In this paper, we propose a robust Kalman filter and smoother for the errors-invariables (EIV) state space model subject to observation noise with outliers. We introduce the EIV problem with outliers and then we present the minimum covariance determinant (MCD) estimator which is highly robust estimator to detect outliers. As a result, a new statistical test to check the existence of outliers which is based on the Kalman filter and smoother has been formulated. Since the MCD is a combinatorial optimization problem the randomized algorithm has been proposed in order to achieve the optimal estimate. However, the uniform sampling method has a high computational cost and may lead to biased estimate, therefore we apply the sub-sampling method. A Monte Carlo simulation result shows the efficiency of the proposed algorithm.
In the process of rational development and utilisation of nuclear energy, people often face nuclear accidents such as lost and stolen radioactive sources;so, the means of searching for these sources quickly in highly ...
详细信息
In the process of rational development and utilisation of nuclear energy, people often face nuclear accidents such as lost and stolen radioactive sources;so, the means of searching for these sources quickly in highly radioactive environments is an important security challenge. In the past, these jobs were limited to workers specialising in nuclear technology. They used gamma-ray detection equipment to search for radioactive sources, but the search efficiency was low. The main purpose of this article is to design a meta-heuristic algorithm based on imitating professional technicians to locate radioactive sources in a computer-aided manner. At the same time, due to the complexity that may characterise the actual search, the search strategy must be optimised. The article established an intelligent randomsearch model with human thinking Finally, it was proved based on the mathematical theory that the complexity of the model searchalgorithm is linear, and the simulation experiment results show that the optimisation algorithm has good efficiency and fault tolerance.
暂无评论