http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Identification of Bovine Pituitary Growth Hormone Variants
위정화,김병기 한국생명과학회 1998 한국생명과학회 학술발표회 Vol.20 No.-
Growth hormone produced from bovine anterior pituitary gland was a 21.5 kDa protein. According to the denaturing one-dimensional polyacrylamide gel electrophoresis and Western blotting, there were no size variants detected from the whole pituitary extracts. Bovine growth hormone could be easily isolated and purified by HPLC(high pressure liquid chromatography). When HPLC purified growth hormone was again analysed by the gel electrtophoresis and Western blotting, only 21.5 kDa growth hormone was found. Therefore, it seemed that there were no size variant isoforms in bGH. However, in the analysis by two-dimensional polyacrylamide gel electrophoresis followed by Western blotting, three isoforms (1, 2, and 3) of charge variants with the same molecular weight of 21.5 kDa were detected. Each isoform 1, 2, and 3 comprised to 23, 65, and 12%, respectively, of the total pituitary growth hormone. The isoelectric point(pI) of each isoform 1, 2, and 3 was 5.3, 5.5, and 5.7, respectively. These variants are expected to have their unique biological activities.
위정화,황유모 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-
In this paper, we propose 1-tap ACDFE(Additional Coefficient DFE) channel equalization algorithm which use the frequency domain DFE(Decision Feedback Equalization) with additional coefficients and confirm its performance in applying minimum mean-square error(MMSE) criterion. It is confirmed by computer simulations that the proposed ACDFE has better performance than the conventional DFE in terms of SER and MSE. The ACDFE has advantages which are the speed of convergence and robust operation in Doppler shift by additional coefficient which is independent of subcarrier.
위정화,황유모 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-
In this paper, we propose a robust frequency offset estimation method of OFDM signals. A carrier frequency offset may be decomposed into an integer multiple of the subcarrier spacing and a residual frequency offset. Fractional part of frequency offset is obtained by using the maximum likeihood estimation(MLE) method. We use the correlation of the samples at the output of the discrete Fourier transform(DFT) to estimate integer part of frequency offset. Simulation results show that the estimation frequency offset is almost linear to frequency offset. We propose to an improved estimation error variance of the carrier frequency offset estimation. The proposed estimator has better performance than the conventional ones in terms of error variance and tracking range.