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전인곤,김용덕,전흥신 경희대학교 산학협력기술연구원 1998 산학협력기술연구논문집 Vol.4 No.-
University, college and Technical high school those have a department of mechanical engineering need a experimental practice engine form educational machinery and using this practice student in structure of engine, operation and efficiency characteristics. But, because the engine that they have purchased is for vehicles, agriculture and industry, it is not available to experimental practice, can't alter fuel and the ration of compression and also the combustion process is not visible so efficiency of education for practical machinery is very low. In this study, a fuel, ignition time, the ration of compression is alterable and we design a single cylinder 4-cycle engine of 60~100cc rate of stroke volume with a heat-proof glass that is visible.
2차원 어레이를 이용한 Vector-radix 2차원 고속 DCT의 효율적인 VLSI 구현
신경욱,전흥우,강용섬 金烏工科大學校 1993 論文集 Vol.14 No.-
This paper describes an efficient array algorithm for parallel computation of vector-radix two-dimensional (2-D) fast discrete cosine transform(VR-FCT), and its VLSI implementation. The proposed array algorithm features architectural modularity, regularity and locality, so that it is very suitable for VLSI realization. Also, no transposition memory is required. It has the time complexity of ?? for (N X N) 2-D DCT, where ?? is the number of non-zero digits in canonic-signed digit (CSD) code. An array core based on the proposed array algorithm is designed with ISRC 1.5㎛ double metal N-Well CMOS technology. A hierarchical design approach based on Bit-Slice Unit (BSU) is adopted to achieve simple design and regular interconnections. The designed array core consists of 64 PE's arranged in 8 rows 8 columns, and it contains about 98,000 transistors on an area of 138㎜²excluding control logic block. From simulation results, it is estimated that (8X8) 2-D DCT(??) can be computed in about 0.88㎲ec at 50MHz clock frequency, resulting in the throughput rate of about 72 Mega pixels per second.
김동순,김기홍,전흥용,나승용,최용문,임명순 한국농업정보과학회 2000 농업정보과학 Vol.2 No.1
A diagnosis program of damage-symptom caused by fruit tree pest was developed using Portable Document Format (Docucom PDF). To construct program structure, the damage patterns of plants cased by pests and the morphological rhararteristics of pests were sorted by plant organs. Diagnoses are rallied out by selecting a host species > document symptoms arranged by plant organs > comparing similar symptoms of pests using step by step menu through damage symptoms. In addition, pest information can be accessed either through the scientific or common name of the pest organism.
김기돈,이시원,강은하,신용길,전재용,허노열,이흥식 충남대학교 농업과학연구소 2013 농업과학연구 Vol.40 No.2
The disease and insect were surveyed locally in greenhouse, fruit packing house and store house of 51 farms in 13 towns having purpose of paprika exportation. By analysis, various disease and insect were not only founded locally but more ones detected in farms having old facilities and no natural enemy. We found 15 pathogens such as Fusarium spp., Alternaria solani, Leveilluila taurica, PepMV (Pepino mosaic virus) and TMV (Tobacco mosaic virus) in greenhouse, Fusarium spp. in fruit packing house and Penicillium spp. in store house. We found 15 insects in greenhouse such as Bemisia tabaci, rialeurodes vaporariorum and Myzus persicae in greenhouse, Hylobitelus haroldi in fruit packing house. However, the problem quarantine disease and insect for importation and exportation were not detected in inspection time.
시설하우스에서 오이에 대한 목화바둑명나방의 방제결정수준
전흥용(Heung Yong Jeon),김형환(Hyeong Hwan Kim),양창열(Chang Yeol Yang) 한국원예학회 2006 원예과학기술지 Vol.24 No.4
시설 오이에서 목화바둑명나방의 방제결정수준을 설정하기 위하여 목화바둑명나방의 접종밀도에 따른 오이의 생육, 피해 및 수량을 조사하였다. 목화바둑명나방 유충의 섭식량은 2령충이 21.5㎟, 3령충이 706.5㎟, 4령충이 753.5㎟, 5령충이 124.0㎟였다. 오이의 초장은 유충 접종 44일까지는 접종밀도간에 유의적인 차이가 없었으나, 73일째는 차이가 있었다. 피해엽률은 유충 접종 15일부터 접종밀도가 많을수록 증가하였다. 목화바둑명나방 유충 0, 1, 2, 4, 6, 8, 10 및 12마리 접종구에서 전체 작기 중 수량은 각각 51.0, 48.2, 42.7, 33.7, 29.8, 17.3, 14.5 및 13.7kg였다. 과실 피해는 유충 접종 후 44일(정식 후 60일)부터 발생하였으며, 과실피해율은 유충 0, 1, 2, 4, 6, 8, 10 및 12 마리 접종구에서 각각 0, 0, 0, 0, 3.0, 4.8, 7.4 및 8.3%였다. 접종 마리수별과실 피해율을 회귀식화하면 y=0.7745x-1.2255(r²=0.9267)였다. 방제결정수준은 과실 피해율의 회귀식에 자연 손실률 5.8%를 대입한 결과 주당 9.1마리였다. This study was investigated the damage and control threshold of the cotton caterpillar (Palpita indica) in cucumber greeehouse. The consumption quantity of the cotton caterpillars was 21.5 ㎟ in 2nd instar, 706.5 ㎟ in 3rd instar, 753.5 ㎟ in 4th instar, and 124.0 ㎟ in 5th instar. The plant height was not different at 44 days after larva released, but significantly different at 73 days. The leaf damage ratio was significantly different from 15 days to 73 days after larva released. The yield of fruits was 51.0 ㎏ for non-treated, 48.2 ㎏ for one larva, 42.7 ㎏ for two larvae, 33.7 ㎏ for four larvae, 29.8 ㎏ for six larvae, 17.3 ㎏ for eight larvae, 14.5 ㎏ for ten larvae, and 13.7 ㎏ for twelve larvae when the cotton caterpillar 2nd~3rd instar was released with different density. The fruit damage was occurred 44 days after cotton caterpillar released, the fruit damage was 0% for non-treatment, 0% for one larva, 0% for two larvae, 0% for four larvae, 3.0% for six larvae, 4.8% for eight larvae, 7.4% for ten larvae, and 8.3% for twelve larvae. When the fruit damage ratio was transformed, the equation of regression was y=0.7745x-1.2255 (r²=0.9267). Considering a natural loss ratio of 5.8%, the control threshold of cotton caterpillar was 9.1 larvae per plant in cucumber greenhouse.
전흥용(Heung Yong Jeon),김형환(Hyeong Hwan Kim),양창열(Chang Yeol Yang),장한익(Han Ik Jang),목일진(Il Gin Mok),임명순(Myoung Soon Yiem) 한국원예학회 2005 원예과학기술지 Vol.23 No.3
살충제의 과다 사용을 줄이기 위하여 배추좀나방의 피해와 방제 결정 수준에 대한 연구를 수행하였다. 배추좀나방 유충의 령기별 섭식량은 2령충이 5.5㎟, 3령충이 10.3㎟, 4령충이 83.9㎟로 령기가 높을수록 많았다. 배추좀나방 유충과 암컷성충을 배추 유묘에 각각 6마리와 4마리를 처리했을 때 유충은 20일, 암컷 성충은 21일후 5엽 전체가 피해를 받았다. 배추좀나방 2령충의 접종밀도에 따른 배추의 유묘기(50일 묘)와 외엽신장기(70일 묘) 수량 손실률은 유묘기에는 무처리, 1, 2, 4, 6 및 8마리 접종구에서 각각 0, 12, 32, 60, 90 및 100%였고, 외엽신장기에는 0, 4, 14, 34, 70 및 90%였다. 접종 마리수 별 손실률을 회귀식화하면 유묘기가 y=13.2x+2.8, 외엽신장기가 y=11.92x-6.37이었다. 회귀식에 자연 손실률 5%를 대입하여 방제 결정 수준을 계산한 결과 유묘기에는 주당 0.2마리, 외엽신장기에는 주당 1.0마리였다. The study was investigated the damage and control threshold of the diamondback moth (Plutella xylostella), giving cut down the amount of insecticide. The consumption quantity of the diamondback moths was 5.5 ㎟ in 2nd instar, 10.3 ㎟ in 3rd instar, and 83.9 ㎟ in 4th instar. When diamondback moth larva and female adult were treated with six and four each per seedling, five leaf whole received a damage at 20 days after larva treated, while that of the female adult was 21 days. The loss was 0% for non-treated, 12% for one larva, 32% for two larvae, 60% for four larvae, 90% for six larvae, and 100% for eight larvae when the diamondback moth 2nd instar was inoculated different density in the young seedling period (50-days seedling). At outside leaf elongation period (70-days seedling), the loss was 0% for non-treatment, 4% for one larva, 14% for two larvae, 34% for four larvae, 70% for six larvae, and 90% for eight larvae. When the loss ratio was transformed, the equation of regression was y = 13.2x + 2.8 in young seedling period and y = 11.92x - 6.37 at outside leaf elongation period. The loss ratio was substituted in the expression of regression and estimated occurrence density. Considering a natural loss ratio of 5%, the control threshold of the diamondback moth at the young seedling period was 0.2 larva per plant and 1.0 larva at outside leaf elongation period in a Chinese cabbage.