http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
차별적인 드랍-확률을 갖는 동적-VQSDDP를 이용한 상대적 손실차별화의 달성
조경래 ( Kyung-rae Cho ),구자환 ( Ja-whan Koo ),정진욱 ( Jin-wook Chung ) 한국정보처리학회 2008 한국정보처리학회 학술대회논문집 Vol.15 No.2
In order to various service types of real time and non-real time traffic with varying requirements are transmitted over the IEEE 802.16 standard is expected to provide quality of service(QoS) researchers have explored to provide a queue management scheme with differentiated loss guarantees for the future Internet. The sides of a packet drop rate, an each class to differential drop probability on achieving a low delay and high traffic intensity. Improved a queue management scheme to be enhanced to offer a drop probability is desired necessarily. This paper considers multiple random early detection with differential drop probability which is a slightly modified version of the Multiple-RED(Random Early Detection) model, to get the performance of the best suited, we analyzes its main control parameters (max<sub>th</sub>, min<sub>th</sub>, max<sub>p</sub>) for achieving the proportional loss differentiation (PLD) model, and gives their setting guidance from the analytic approach. we propose Dynamic-multiple queue management scheme based on differential drop probability, called Dynamic-VQSDDP(Variable Queue State Differential Drop Probability)T, is proposed to overcome M-RED's shortcoming as well as supports static max p parameter setting values for relative and each class proportional loss differentiation. M-RED is static according to the situation of the network traffic, Network environment is very dynamic situation. Therefore max p parameter values needs to modify too to the constantly and dynamic. The verification of the guidance is shown with figuring out loss probability using a proposed algorithm under dynamic offered load and is also selection problem of optimal values of parameters for high traffic intensity and show that Dynamic-VQSDDP has the better performance in terms of packet drop rate. We also demonstrated using an ns-2 network simulation.
씨크라멘먼지응애(Phytonemus pallidus)와 차먼지응애(Polyophagotarsonemus latus)의 분류학적 고찰
조명래,정순경,이원구 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.16 No.-
먼지응애류 중 농업상 가장 중요한 씨크라멘먼지응애(Phytonemus pallidus)와 차먼지응애(Polyphagotarsonemus latus)의 분류 및 형태적 특징에 관하여 기재하였고 각 종별로 암, 수컷의 복면 및 배면의 특징을 도판으로 나타내었다. 씨크라멘먼지응애는 경기도 고양의 팔손이에서 채집되었으며 차먼지응애는 고추, 아잘리아, 아프리카 봉선화, 낙상홍, 물푸레나무등에서 채집되었다. Morpholosical characteristics and taxonomy of the two most important Tarsonemif mites in agriculture, Cyclamen mite (Phytonemus pallidus (Banks), 1899) and Broad mite (Poly-phagotarsonemus latus Banks, 1904) are described and drawings of ventral and dorsal views of females and males of each species are provided. Cyclamen mite was collected from Fatsia japonnica, and Broad mite was collected from Capcicum annuum, Rhododenron schlippenbachii, Impatiens sultanii, Ilex serrata, and Fraxinus rhynchophylla.
조학래(Hak-Rae Cho),서수덕(Soo-Duk Seo),구경헌(Kyung Heon Koo) 대한전자공학회 2019 전자공학회논문지 Vol.56 No.5
본 논문에서는 비교적 낮은 유전율을 갖는 LTCC 소재를 이용하여 비대역폭 3% 이하인 5차 협대역 필터를 설계하였다. 협대역 필터의 기능과 성능을 개선하기 위하여 교차결합 원리를 적용하여 인접대역의 차단 특성을 향상시켰다. 높은 차단과 낮은 삽입손실 특성은 서로 인접하지 않은 공진기 간에 결합 구조를 추가하여 얻었다. 필터를 구성하는 결합공진기 사이에 전자기 교차 결합 구조를 갖는 작은 스트립선로 패치를 추가하여, 공진기 차수를 감소시키고 차단 특성을 개선할 수 있는 LTCC 대역통과 필터가 구현되었다. 제작 과정에 있어서 NH20M4 유전체 파우더를 사용한 LTCC 필터 구조 내에 Namics의 7251S 전극을 2겹으로 인쇄함으로써 최상의 필터 특성을 얻었다. 이 경우, 설계에 사용된 매체의 유전율은 21.5이며, 구현된 크기는 0.8㎓ 대역에서 6×5×3 [㎣]이다. This paper has presented the design of a narrow band filter with less than 3% bandwidth and the filter order of 5, using a relatively low permittivity LTCC material. The cross-coupling principle is applied to improve the function and performance of the narrow band filter, and the blocking characteristics of the adjacent band have been enhanced. High blocking and low insertion loss characteristics are obtained by adding coupling structures between resonators that are not adjacent to each other. By adding a small strip line patch with an electromagnetic cross-coupling structure between the coupled resonators constituting the filter, the LTCC band pass filter is realized which can reduce the resonator-order and improve the blocking characteristics. In the fabrication process, Namics’ 7251S electrode was printed twice in the LTCC filter structure using NH20M4 dielectric powder, and the best filter characteristics have been obtained. In this case, the dielectric constant of the material used in the design is 21.5, and the implemented size is 6×5×3 [㎣] for the 0.8 ㎓ band.
이재구,경기성,오경석,조광래 한국환경농학회 1993 한국환경농학회지 Vol.12 No.2
토양미생물에 의한 제초제 bentazon(3-isopropyl-2,1,3-benzothiadiazin-4-one-2,2-dioxide)의 분해를 구명하기 위하여 성질이 서로 다른 충북지역의 밭토양 2종과 논토양 2종을 담수 및 밭토양 조건하에서 23±1℃ 배양하였다. Bentazon 200 ppm을 처리한 Cheong Won A 토양 (Silty loam; pH, 5.2; 유기물 함량 1.4%)을 6개월 동안 담수상태에서 배양하였을 때 주 분해산물로 6-hydroxy bentazon (1.27%) 및 소량의 8-hydroxy bentazon (0.57%,)과 anthranilic acid (0.13%)가 형성되었다. 한편 bentazon 500 ppm을 처리한 동일토양을 2개월 동안 배양하였을 때는 소량의 6-hydroxy bentazon이 형성되었다. 8종의 미생물을 토양으로 부터 분리하여 순수배양실험을 하였으나 뚜렷한 분해산물을 검출하지 못하였다. Cheong Won A 토양이 Cheong Ju A 토양보다 더욱 큰 dehydrogenase 활성을 나타낸 것으로 보아 전자가 후자보다 더 큰 bentazon 분해력을 가질 것이라고 추측되었다. 세균 14종과 곰팡이 8종에 대하여 bentazun 10 ppm을 처리하고 14일간 배양하였을 때 Rhizopus stolonifer만이 주 분해산물로 anthranilic acid (4.6∼31.6%) 그리고 소량의 6-hydroxy bentazon과 8-hydroxy bentazon (1.27%)을 형성하였으며, 나머지 미생물에서는 대사산물을 검출할 수 없었다. In order to elucidate the degradation of the herbicide bentazon (3-isopropyl-2,1,3-benzothiadiazin-4-one-2,2-dioxide) by soil microorganisms, it was incubated at 23± 1 ℃ under the submerged and upland soil conditions of the different soils in the Chung Buk area. When bentazon (200 ppm) was incubated in Cheong Won A soil (silty loam; pH, 5.2; organic matter 1.4%) under the submerged condition for 6 months, 6-hydroxy bentazon (1.27%) was formed as the major degradation product and 8-hydroxy bentazon (0.57%) and anthranilic acid (0.13%) were formed as the minor ones. Meanwhile, when 500 ppm of bentazon was incubated in the same soil for 2 months, a trace amount of 6-hydroxy bentazon was formed. Eight strains of microorganisms isolated from the soils did not give any distinct degradation products in the pure culture experiment. The greater dehydrogenase activity in Cheong Won A soil than in Cheong Ju A soil might be related to the greater bentazon-degradability of the former soil than that of the latter. When bentazon (10 ppm) was incubated for 14 days with 14 strains of bacteria and 8 strains of fungi, the identities of which were all known, Rhizopus stolonifer produced 4.6∼31.6% of anthranilic acid as the major product from batch to batch, with trace amounts of 6-hydroxy bentazon and 8-hydroxy bentazon as minor products. The rest microorganisms did not produce any noticeable products.
Metamaterial 전송선로를 이용한 4출력 90°위상 분배기
조학래 ( Hak-rae Cho ),김정표 ( Jeong-pyo Kim ),구경헌 ( Kyung-heon Koo ) 한국항행학회 2018 韓國航行學會論文誌 Vol.22 No.2
본 논문에서는 90° 위상차를 갖는 GNSS (global navigation satellite system)용 광대역 4출력 분배 회로를 제안한다. 제안하는 분배회로는 1개의 발룬과 2개의 90° 위상 분배기로 이루어진다. 발룬은 wilkinson 분배기와 두 출력단에 각각 ±90° metamaterial 전송선 위상 천이기를 이용하여 구현된다. 90° 위상 분배기의 경우, 발룬과 구조는 같으나, 두 개의 출력단에 각각 ±45° metamaterial 전송선 위상 천이기가 적용된다. Metamaterial 전송선은 LCL-TL (LC loaded transmission line) 단위 셀을 이용하여 구현하였으며, 요구되는 위상 천이 특성을 구현하기 위해 5셀을 갖도록 하였다. 구현된 4출력 90° 위상 분배기는 GNSS 대역인 1.165 -1.61 GHz의 넓은 대역에서 각 포트별 90° ± 10°의 위상차를 갖는다. We propose a wideband 4-way quadrature divider for global navigation satellite system (GNSS). The proposed divider consists of one balun and two 2-way quadrature dividers. In the balun, the input power is divided by a wilkinson divider and the out of phase characteristic is achieved by ±90° metamaterial transmission line phase shifters applied two output ports. The structures of two quadrature dividers is similar to that of the balun, but the phase shifters of two output ports are exchanged by ±90° metamaterial transmission line. Metamaterial transmission lines are designed by using five LC loaded transmission line (LCL-TL) unit cells. The fabricated 4 way quadrature divider has the phase characteristic of 90° ± 10° in 1.165 - 1.61 GHz.