The investigation of this work is to analysis the sensitivity distributions using two differential excitation potentials, in order to improve the situation of: (1) non-uniform sensitivity distribution: (2) less sensit...
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Korea has been developing coast has been developing wind energy on land for a long time, and the government is in preparations of an offshore wind farm for the first time. The conditions of the wind rose affect not on...
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Korea has been developing coast has been developing wind energy on land for a long time, and the government is in preparations of an offshore wind farm for the first time. The conditions of the wind rose affect not only the structures of wind turbine, but are also important in predicting the future energy production rate. If an offshore wind farm is to be composed, it is the most important factor to predict the amount of energy produced each year on the predicted site of the wind farm. In order to predict this, a Met mast must be installed at the selected site for more than one year to analyze the measured wind rose resource. This study has analyzed the wind rose resource by using the data obtained through the Met mast of 60[m] height installed on an island of the Southwest coast, and the measured data has been applied on WindPRO and WAsP programs to predict the annual energy production based on the calculation of the energy production under the assumption that a 100[MW] level offshore wind farm is composed at the selected site. The result was 313,672.24[MWh/year] if 50 2[MW] level wind generators are applied, thus a usage rate of 35.81% is expected.
This paper deals with the approximate worst-case test method for testing the insertion loss of the EMI filters. The systems with 0.1 Ω and 100 Ω and vice versa impedances are usually used for this testing. These mea...
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This paper deals with the approximate worst-case test method for testing the insertion loss of the EMI filters. The systems with 0.1 Ω and 100 Ω and vice versa impedances are usually used for this testing. These measuring systems are required by the international CISPR 17 standard. The main disadvantage of this system is the 0.1 Ω impedance transformer. The dynamic range for the transformation from the 50 Ω, which is most common matched impedance for the measurement setups, to 0.1 Ω is very large. It is not easy to produce such transformers with this high impedance transformation ratio. These transformers have usually very narrow bandwidth and require the several of these transformers for one filter measurement. This paper discusses the alternative system with 1 Ω and 100 Ω impedances and also vice versa for the measuring the performance of the RFI filters. The modification itself was done according to the mathematical model for the first estimation of the filters' performance and the optimal configuration with 1 Ω and 100 Ω impedances was chosen according the calculated results as the optimal compromise. The performance of this system was tested on several filters and the obtained data are depicted, too. The performance comparison of several filters in the asymmetrical and symmetrical systems is also included. The performance of alternate worst-case system is discussed in the conclusion.
In this paper, we propose a novel image annotation algorithm based on Markov model. This algorithm treats each candidate keyword as a state in Markov chain, and implements image annotation by estimating the probabilit...
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In this paper, we describe an algorithm to decompose multi-lead ECG data simultaneously into different linear expansions of the same atoms that are selected from a redundant dictionary. These waveforms are chosen in o...
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Anti-skid Braking control Box is one of the most important equipments in the aircraft. It is dangerous and costly to modify the parameters of the controller directly. In the paper, a digital aircraft is built, and the...
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Recently, the use of security surveillance system including CCTV is increasing due to the increase of terrors and crimes. However as the data recorded through the video surveillance system is exposed, the invasion of ...
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Most of embedded cross compiler tools are cross-compilers based on glibc and Linux kernel in the form of ARCH-Hnux-*. They are mainly for Linux operating system, depending on specified C language library glibc, and al...
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The paper presents a GPS-based positioning method mainly used to field rescue. The position and orientation of the rescuer and the trapped are acquired using GPS chip and digital compass. Using the GPS data and compas...
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