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Zhen-xue Liu,Zhong-xue Gan,Jun-jie Gu,Qing-feng Song 대전대학교 환경문제연구소 2015 환경문제연구소 논문집 Vol.19 No.-
Benzene was oxidized by binary oxidants composed of nitric acid and hydrogen peroxide at 80℃. The product obtained was analyzed with gas chromatograph-mass spectrometer. Eight high value compounds, 2-nitrophenol, 2-chloro-6-nitrophenol, 4-chloro-2- nitrophenol, 2-chloro-4-nitrophenol, 2,4-dinitrophenol, 4-nitrophenol, 2,6-dinitrophenol and 2-chloro-4,6-dinitro-phenol were found, which they have high contents in the range from 4.28% to 32.52%. These compounds are very widely used in organic synthesis. e.g., synthesizing dye, medicines and chemical reagents, pesticide, explosive, polymer, etc.
Impact of Large-scale Wind Power Integration on the UFLS Scheme
Xue, Feng,Li, Yue,Song, Xiao-Fang,Mo, Ruan-Qing The Korean Institute of Electrical Engineers 2014 The Journal of International Council on Electrical Vol.4 No.3
This paper analyzes some major factors for the impact of wind power integration on power system dynamic frequency characteristics in theory. Combining with an actual grid, test scenarios with various scales of doubly fed induction generator (DFIG)-based wind power integration are formulated. Through simulation in the scenarios with FASTEST software, the impacts on the action of under frequency load shedding (UFLS) scheme are displayed in two aspects, the rate of change of frequency (ROCOF) and wind turbine generator own protection. Simulation result shows that the ROCOF will not affect the lock action of UFLS devices in the test system of this paper. Wind turbine generator protection may worsen frequency responses, so it is proposed to be in harmony with the design of UFLS scheme.
Feng-Xue Jin,Lehung Linh,Kyung-Ho Kang,Sang-Nag Ahn 한국육종학회 2005 한국육종학회지 Vol.37 No.5
Introgression has been achieved from wild species Oryza minuta (2n=48, BBCC, Acc. No. 101141) into O. sativa subsp. japonica cv. Hwaseongbyeo. Hwaseongbyeo was used as a recurrent parent and O. minuta as a donor parent. An advanced backcross line, WH79006 produced from a single plant from BC5F3 families, resembled Hwaseongbyeo, but it showed differences from Hwaseongbyeo in grain traits including 1,000 seed weight (TSW). These differences between Hwaseongbyeo and WH79006 could be attributed to the introgression of O. minuta chromosome segments into WH79006. To identify and characterize the effects of alien gene(s) introgressed into WH79006, the F2 and F3 populations from the cross between Hwaseongbyeo and WH79006 were developed. The 75 F2 plants were evaluated for 8 traits in 2003 and their progeny, the 75 F3 lines for 12 agronomic traits in 2004. Genotypes were determined for 75 F2 plants using simple sequence repeat (SSR) markers. QTL analysis was carried out to determine the relationship between marker genotype and the traits evaluated. A total of nineteen QTLs were identified using single point analysis. Among these, 4 QTLs were detected on chromosomes 7, 10 and 11 in the F2 population, which explained ranging from 5.7 to 12.6% of the total phenotype variation. Fifteen QTLs were detected on chromosomes 3, 5, 7, 8, 10 and 11 in the F3 population, which explained 4.3 to 13.5% of the phenotype variation. The number of QTLs detected per chromosome ranged from 1 to 4 in both populations. Comparison of QTLs indicated that four QTLs associated with days to heading (dth), 1,000 seed weight (tsw), seed length (sl) and L/W ratio of seed (lw) were shared in both populations and the remaining 11 only in the F3 population. Among these QTLs identified, nine QTLs have not been detected in previous QTL studies between Oryza cultivars, indicating potentially novel alleles from O. minuta. The QTLs detected in this study could be a rich source of natural genetic variation underlying the evolution and breeding of rice.
A UNIFORM STRONG LAW OF LARGE NUMBERS FOR PARTIAL SUM PROCESSES OF FUZZY RANDOM SETS
Xue-feng Duan,Qing-wen Wang,Chun-mei Li 한국전산응용수학회 2012 Journal of applied mathematics & informatics Vol.30 No.3
Based on the elegant properties of the spectral norm and Thompson metric,we firstly give two perturbation estimates for the positive definite solution of the nonlinear matrix equation [수식] which arises in an optimal interpolation problem.
Feng-Xue Jin,Xiao-Bo Xie,Shi-Dong Ji,Hong-Guang Ju,Jung-Pil Suh,Hung-Goo Hwang,Sang-Nag Ahn 한국작물학회 2008 한국작물학회 학술발표대회 논문집 Vol.2008 No.10
Grain weight (GW) or grain size is the most important target not only as a major component of grain yield, but also associated with the cooking quality in rice breeding program. In a previous study, two loci for grain weight, gw8 and gw9, have been fine map to about 306.4kb and 37.4kb, respectively, in backcross populations derived from a cross between the Korean japonica cultivar Hwaseongbyeo and Oryza rufipigon (IRGC 105491). Both O.rufipogon alleles increased GW in the Hwaseongbyeo background despite the fact that O. rufipogon was the small-seeded parent. To test the effect of pyramiding the QTLs for grain weight, an F2 population consisted of 226 individuals was developed derived from the cross between the two QTLs (gw8 and gw9), and used MAS to select nearly isgenic lines for two QTLs and a pyramiding line. Molecular genotyping of F2 population revealed the existence of interaction between gw8 and gw9. Moreover, the interaction was also confirmed by phenotypic analysis of four QTL-NILs. The results suggest that epistasis interaction is important genetic basis in determining yield traits in rice.
Regional innovation networks and risk analysis based on Industry-University-Reserach Institution
Feng Feng,Xue Qin 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.10
According to the system theory, the structure of the network determines characteristics of the network. Our paper builds a regional innovation network of Industry-University-Research Institution and analyzes the network structure variables the aggregation coefficient, average shortest path length, degree distribution by social network model. The result is obtaining the contact between network structure variables and risks, which will improve and promote the formation and development of the regional innovation networks based on Industry-University-Research Institution.