• Title/Summary/Keyword: Multi-standard

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The Bees Algorithm with Weighted Sum Using Memorized Zones for Multi-objective Problem

  • Lee, Ji-Young;Oh, Jin-Seok
    • Journal of Advanced Marine Engineering and Technology
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    • v.33 no.3
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    • pp.395-402
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    • 2009
  • This paper presents the newly developed Pareto-based multi-objective Bees Algorithm with weighted sum technique for solving a power system multi-objective nonlinear optimization problem. Specifically, the Pareto-based Bees Algorithm with memorized zone has been developed to alleviate both difficulties from classical techniques and intelligent techniques for multi-objective problems (MOP) and successfully applied to an Environmental/Economic (electric power) dispatch (EED) problem. This multi-objective Bees Algorithm has been examined and applied to the standard IEEE 30-bus six-generator test system. Simulation results have been compared to those obtained using other approaches. The comparison shows the potential and effectiveness of the proposed Bees Algorithm for solving the multi-objective EED problem.

The Design of CMOS Multi-mode/Multi-band Wireless Receiver

  • Hwang, Bo-Hyeon;Jeong, Jae-Hun;Yu, Chang-Sik
    • Proceedings of the IEEK Conference
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    • 2006.06a
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    • pp.615-616
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    • 2006
  • Nowadays, the need of multi-mode/multi-band transceiver is rapidly increasing, so we design a direct conversion RF front-end for multi-mode/multi-band receiver that support WCDMA/CDMA2000/WIBRO standard. It consists of variable gain reconfigurable LNA and single input double balanced Mixer and complementary differential LC Oscillator. The circuit is implemented in 0.18 um RF CMOS technology and is suitable for low-cost mode/multi-band.

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The Identification of Multi-Fuzzy Model by means of HCM and Genetic Algorithms (클러스터링 기법과 유전자 알고리즘에 의한 다중 퍼지 모델으 동정)

  • Park, Byoun-Jun;Lee, Su-Gu;Oh, Sung-Kwun;Kim, Hyun-Ki
    • Proceedings of the KIEE Conference
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    • 2000.07d
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    • pp.3007-3009
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    • 2000
  • In this paper, we design a Multi-Fuzzy model by means of clustering method and genetic algorithms for a nonlinear system. In order to determine structure of the proposed Multi-Fuzzy model. HCM clustering method is used. The parameters of membership function of the Multi-Fuzzy are identified by genetic algorithms. We use simplified inference and linear inference as inference method of the proposed Multi-Fuzzy model and the standard least square method for estimating consequence parameters of the Multi-Fuzzy. Finally, we use some of numerical data to evaluate the proposed Multi-Fuzzy model and discuss about the usefulness.

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The optimal identification of nonlinear systems by means of Multi-Fuzzy Inference model (다중 퍼지 추론 모델에 의한 비선형 시스템의 최적 동정)

  • Jeong, Hoe-Yeol;Oh, Sung-Kwun
    • Proceedings of the KIEE Conference
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    • 2001.07d
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    • pp.2669-2671
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    • 2001
  • In this paper, we propose design a Multi-Fuzzy Inference model structure. In order to determine structure of the proposed Multi-Fuzzy Inference model, HCM clustering method is used. The parameters of membership function of the Multi-Fuzzy are identified by genetic algorithms. A aggregate performance index with a weighting factor is used to achieve a sound balance between approximation and generalization abilities of the model. We use simplified inference and linear inference as inference method of the proposed Multi-Fuzzy model and the standard least square method for estimating consequence parameters of the Multi-Fuzzy. Finally, we use some of numerical data to evaluate the proposed Multi-Fuzzy model and discuss about the usefulness.

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Development of Multi-sample Loading Device for TEM Characterization of Hydroxyapatite Nanopowder

  • Lee, Jong-Moon;Kim, Jung-Kyun;Jeong, Jong-Man;Kim, Jin-Gyu;Lee, Eunji;Kim, Youn-Joong
    • Bulletin of the Korean Chemical Society
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    • v.34 no.3
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    • pp.788-792
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    • 2013
  • A shortcoming of using transmission electron microscopy (TEM) for structural analysis via electron diffraction is the relatively large error of the measurements as compared to X-ray diffraction. To reduce these errors, various internal standard methods from earlier studies have been widely used. We developed a new device to facilitate the application of internal standard methods in preparation of TEM grids used for nanopowder analysis. Through the application of a partial mask on the TEM grid, both the internal standards and the research materials can be loaded on the same grid. Through this process, we conducted a TEM analysis that compared synthetic hydroxyapatite (HAp) nanopowder to bone apatite from a bovine femur. We determined that the accuracy of the d-spacing measurements of the HAp and bone powders could be improved to better than 1% after statistical treatments of the experimental data. By applying a quarter mask, we loaded four different nanoparticles on a single TEM grid, with one section designated for the internal standard.

Material Characteristics of Dental Implant System with In-Vitro Mastication Loading

  • Jeong, Tae-Gon;Jeong, Yong-Hun;Lee, Su-Won;Yang, Jae-Ung;Jeong, Jae-Yeong;Park, Gwang-Min;Gang, Gwan-Su
    • Proceedings of the Korean Institute of Surface Engineering Conference
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    • 2018.06a
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    • pp.72-72
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    • 2018
  • A dynamic fatigue characteristic of dental implant system has been evaluated with applying single axial compressive shear loading based on the ISO 14801 standard. For the advanced dynamic fatigue test, multi-directional force and motion needed to be accompanied for more information of mechanical properties as based on mastication in oral environment. In this study, we have prepared loading and motion protocol for the multi-directional fatigue test of dental implant system with single (Apical/Occlusal; AO), and additional mastication motion (Lingual/Facial; LF, Mesial/Distal; MD). As following the prepared protocol (with modification of ISO 14801), fatigue test was conducted to verify the worst case results for the development of highly stabilized dental implant system. Mechanical testing was performed using an universal testing machine (MTS Bionix 858, MN, USA) for static compression and single directional loading fatigue, while the multi-directional loading was performed with joint simulator (ADL-Force 5, MA, USA) under load control. Basically, all mechanical test was performed according to the ISO 14801:2016 standard. Static compression test was performed to identify the maximum fracture force with loading speed of 1.0 mm/min. A dynamic fatigue test was performed with 40 % value of maximum fracture force and 5 Hz loading frequency. A single directional fatigue test was performed with only apical/occlusal (AO) force application, while multi directional fatigue tests were applied $2^{\circ}$ of facial/lingual (FL) or mesial/distal (MD) movement. Fatigue failure cycles were entirely different between applying single-directional loading and multi-directional loading. As a comparison of these loading factor, the failure cycle was around 5 times lower than single-directional loading while applied multi-directional loading. Also, the displacement change with accumulated multi-directional fatigue cycles was higher than that of single directional cycles.

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A study on the usage satisfaction of multi-type handpieces with equipped air-jet function (Air-jet기능을 장착한 멀티형 복합유닛 핸드피스의 사용 만족도 조사)

  • Kim, Im-Sun;Choi, Byung-Hwan
    • Journal of Technologic Dentistry
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    • v.37 no.3
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    • pp.169-178
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    • 2015
  • Purpose: This study was to investigate usage satisfaction of multi type handpiece with equipped air-jet function Methods: The subjects of this study through the survey was conducted for fifty-nine dental technicians in Daegu and Gyeongsangbukdo from the May 7 to 19, after the June 23 to July 4 2014. The survey was about the function and quality through user testing environment by cutting zirconia specimens using appliance for zirconia. The collected date was analyzed by the statistical program SPSS Win Ver 19.0 for the satisfaction of handpiece and control system. To test for significance on each item, p<0.05 had been decided a standard. General characteristics and relationship between the handpiece and control system was performed correlation analysis. Results: The results of this study is as follows. 35 dental technicians had 1~2 years career in zirconia part as the highest 59.3%, 95% of subjects expected that the prospects for the zirconia material have bright prospects. The satisfaction of multi type handpiece and control system design and function showed a significant difference. Subjects satisfied with the design and function of the multi type showed negative correlation with those of Standard. The satisfaction of multi type handpiece showed 3.37 points of air jet, 3.05 points of noise level, 2.69 points of water flow rate, and 1.98 points of cruise function. Sample differences in all parameters showed a statistically higher difference. Conclusion: High-speed cutting mechanism of multi-type is recommended working with zirconia materials and the multi-type unit combined handpiece motor, air-turbine and air-gun will be expected the increase of user due to the high satisfaction of air jet.

Multi-time Programmable standard CMOS ROM memory cell (여러 번 프로그래밍이 가능한 표준 CMOS 공정의 MTP (Multi-times Programmable) ROM 셀)

  • Chung, In-Young
    • Proceedings of the IEEK Conference
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    • 2008.06a
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    • pp.455-456
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    • 2008
  • New CMOS ROM cell is reported in this paper, distinguished from conventional ones in that it can be re-programmed by multi-times. It uses the comparator offset as the physical storage quantity and the MOSFET FN stress effect for offset programming. It demands very low offset for read, and works well in very low voltage. It can become a promising ROM solution for various SoC systems.

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MULTI-COLOR PHOTOMETRY OF NEARBY GALAXIES

  • YANAGISAWA KENSHl;ITOH NOBUNARI;ICHIKAWA TAKASHI
    • Journal of The Korean Astronomical Society
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    • v.29 no.spc1
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    • pp.75-76
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    • 1996
  • We have started multi-color imaging program of nearby galaxies since last year and present preliminary result here. We selected 12 nearby galaxies classfied from E to Sab type and observed in BVRIJHK' bands. Photomtric parameters such as isophotal diameter, axial ratio, isophotal magnitude were measured and observed colors were compared with theoritical model. We find a standard evolution model agrees well with observed results.

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