인삼펩티드 유전자의 합성 및 클로닝 ( Chemical Synthesis and Cloning of Panax ginseng Peptide Gene )

Hongying Zhang,Dongsong Chen,Jin Zhang 고려인삼학회 1990 Journal of Ginseng Research Vol.14 No.2

Chemical Synthesis and Cloning of Panax ginseng Peptide Gene

Hongying Zhang,Dongsong Chen,Jin Zhang 고려인삼학회 1990 International Symposium on Ginseng Vol.- No.-

Performance of Continuous-wave Coherent Doppler Lidar for Wind Measurement

Shan Jiang,Dongsong Sun,Yuli Han,Fei Han,Anran Zhou,Jun Zheng 한국광학회 2019 Current Optics and Photonics Vol.3 No.5

A system for continuous-wave coherent Doppler lidar (CW lidar), made up of all-fiber structures and a coaxial transmission telescope, was set up for wind measurement in Hefei (31.84 N, 117.27 E), Anhui province of China. The lidar uses a fiber laser as a light source at a wavelength of 1.55 µm, and focuses the laser beam on a location 80 m away from the telescope. Using the CW lidar, radial wind measurement was carried out. Subsequently, the spectra of the atmospheric backscattered signal were analyzed. We tested the noise and obtained the lower limit of wind velocity as 0.721 m/s, through the Rayleigh criterion. According to the number of Doppler peaks in the radial wind spectrum, a classification retrieval algorithm (CRA) combining a Gaussian fitting algorithm and a spectral centroid algorithm is designed to estimate wind velocity. Compared to calibrated pulsed coherent wind lidar, the correlation coefficient for the wind velocity is 0.979, with a standard deviation of 0.103 m/s. The results show that CW lidar offers satisfactory performance and the potential for application in wind measurement.

Scanning Rayleigh Doppler Lidar for Wind Profiling Based on Non-polarized Beam Splitter Cube Optically Contacted FPI

Jun Zheng,Dongsong Sun,Tingdi Chen,Ruocan Zhao,Yuli Han,Zimu Li,Anran Zhou,Nannan Zhang 한국광학회 2018 Current Optics and Photonics Vol.2 No.2

A Scanning Rayleigh Doppler lidar for wind profiling based on a non-polarized beam splitter cube optically contacted FPI is developed for wind measurement from high troposphere to low stratosphere in 5-35 km. Non-polarized beam splitter cube optically contacted to the FPI are used for a stable optical receiver. Zero Doppler shift correction is used to correct for laser or FPI frequency jitter and drift and the timing sequence is designed. Stability of the receiver for Doppler shift discrimination is validated by measuring the transmissions of FPI in different days and analyzed the response functions. The maximal relative wind deviation due to the stability of the optical receiver is about 4.1% and the standard deviation of wind velocity is 1.6% due to the stability. Wind measurement comparison experiments were carried out in Jiuquan (39.741°N, 98.495°E), Gansu province of China in 2015, showing good agreement with radiosonde result data. Continuous wind field observation was performed from October 16th to November 12th and semi-continuous wind field of 19 nights are presented.

An Ultra-narrow Bandwidth Filter for Daytime Wind Measurement of Direct Detection Rayleigh Lidar

Fei Han,Hengjia Liu,Dongsong Sun,Yuli Han,Anran Zhou,Nannan Zhang,Jiaqi Chu,Jun Zheng,Shan Jiang,Yuanzu Wang 한국광학회 2020 Current Optics and Photonics Vol.4 No.1

A Rayleigh Lidar used for wind detection works by transmitting laser pulses to the atmosphere and receiving backscattering signals from molecules. Because of the weak backscattering signals, a lidar usually uses a high sensitivity photomultiplier as detector and photon counting technology for signal collection. The capturing of returned extremely weak backscattering signals requires the lidar to work on dark background with a long time accumulation to get high signal-to-noise ratio (SNR). Because of the strong solar background during the day, the SNR of lidar during daytime is much lower than that during nighttime, the altitude and accuracy of detection are also restricted greatly. Therefore this article describes an ultra-narrow bandwidth filter (UNBF) that has been developed on 354.7 nm wavelength of laser. The UNBF is used for suppressing the strong solar background that degrades the performance of Rayleigh wind lidar during daytime. The optical structure of UNBF consists of an interference filter (IF), a low resolution Fabry-Perot interferometer (FPI) and a high resolution FPI. The parameters of each optical component of the UNBF are presented in this article. The transmission curve of the aligned UNBF is measured with a tunable laser. Contrasting the result of with-UNBF and with-IF shows that the solar background received by a Licel transient recorder decreases by 50~100 times and that the SNR with-UNBF was improved by 3 times in the altitude range (35 km to 40 km) compared to with-IF at 10:26 to 10:38 on August 29, 2018. By the SNR comparison at four different times of one day, the ratio-values are larger than 1 over the altitude range (25~50 km) in general, the results illustrate that the SNR with-UNBF is better than that with-IF for Rayleigh Lidar during daytime and they demonstrate the effective improvements of solar background restriction of UNBF.

中國 土地使用政策의 변화

Liu, Weixin,Yang, Dongsong 東義大學校 法政大學 1993 공공정책연구 Vol.9 No.-

An Ultra-narrow Bandwidth Filter for Daytime Wind Measurement of Direct Detection Rayleigh Lidar

Han, Fei,Liu, Hengjia,Sun, Dongsong,Han, Yuli,Zhou, Anran,Zhang, Nannan,Chu, Jiaqi,Zheng, Jun,Jiang, Shan,Wang, Yuanzu Optical Society of Korea 2020 Current Optics and Photonics Vol.4 No.1

A Rayleigh Lidar used for wind detection works by transmitting laser pulses to the atmosphere and receiving backscattering signals from molecules. Because of the weak backscattering signals, a lidar usually uses a high sensitivity photomultiplier as detector and photon counting technology for signal collection. The capturing of returned extremely weak backscattering signals requires the lidar to work on dark background with a long time accumulation to get high signal-to-noise ratio (SNR). Because of the strong solar background during the day, the SNR of lidar during daytime is much lower than that during nighttime, the altitude and accuracy of detection are also restricted greatly. Therefore this article describes an ultra-narrow bandwidth filter (UNBF) that has been developed on 354.7 nm wavelength of laser. The UNBF is used for suppressing the strong solar background that degrades the performance of Rayleigh wind lidar during daytime. The optical structure of UNBF consists of an interference filter (IF), a low resolution Fabry-Perot interferometer (FPI) and a high resolution FPI. The parameters of each optical component of the UNBF are presented in this article. The transmission curve of the aligned UNBF is measured with a tunable laser. Contrasting the result of with-UNBF and with-IF shows that the solar background received by a Licel transient recorder decreases by 50~100 times and that the SNR with-UNBF was improved by 3 times in the altitude range (35 km to 40 km) compared to with-IF at 10:26 to 10:38 on August 29, 2018. By the SNR comparison at four different times of one day, the ratio-values are larger than 1 over the altitude range (25~50 km) in general, the results illustrate that the SNR with-UNBF is better than that with-IF for Rayleigh Lidar during daytime and they demonstrate the effective improvements of solar background restriction of UNBF.

Visibility Measurement in an Atmospheric Environment Simulation Chamber

Hongda Ta,Zibo Zhuang,Lihui Jiang,Dongsong Sun 한국광학회 2017 Current Optics and Photonics Vol.1 No.3

Obtaining accurate visibility measurements is a common atmospheric optical problem, and of vitalsignificance to civil aviation. To effectively evaluate and improve the accuracy of visibility measurements,an outdoor atmospheric simulation chamber with dimensions of 1.8×1.6×55.7 m3was constructed. Thesimulation chamber could provide a relatively homogeneous haze environment, in which the visibility variedfrom 10 km to 0.2 km over 5 hours. A baseline-changing visibility measurement system was constructedin the chamber. A mobile platform (receiver) was moved from 5 m to 45 m, stopping every 5 m, tomeasure and record the transmittance. The total least-squares method was used to fit the extinctioncoefficient. During the experiment conducted in the chamber, the unit weight variance was as low as1.33×10-4under high-visibility conditions, and the coefficient of determination (R2) was as high as 0.99under low-visibility conditions, indicating high stability and accuracy of the system used to measure theextinction coefficients and strong consistency between repeated measurements. A Grimm portable aerosolspectrometer (PAS) was used to record the aerosol distribution, and then Mie theory was used to calculatethe extinction coefficients. The theoretical results were found to be consistent with the measurements andexhibited a positive correlation, although they were higher than the measured values.

Bone Homeostasis and Gut Microbial-Dependent Signaling Pathways

( Xiaohui Zhong ),( Feng Zhang ),( Xinyao Yin ),( Hong Cao ),( Xuesong Wang ),( Dongsong Liu ),( Jing Chen ),( Xue Chen ) 한국미생물생명공학회(구 한국산업미생물학회) 2021 Journal of microbiology and biotechnology Vol.31 No.6

Although research on the osteal signaling pathway has progressed, understanding of gut microbialdependent signaling pathways for metabolic and immune bone homeostasis remains elusive. In recent years, the study of gut microbiota has shed light on our understanding of bone homeostasis. Here, we review microbiota-mediated gut-bone crosstalk via bone morphogenetic protein/SMADs, Wnt and OPG/receptor activator of nuclear factor-kappa B ligand signaling pathways in direct (translocation) and indirect (metabolite) manners. The mechanisms underlying gut microbiota involvement in these signaling pathways are relevant in immune responses, secretion of hormones, fate of osteoblasts and osteoclasts and absorption of calcium. Collectively, we propose a signaling network for maintaining a dynamic homeostasis between the skeletal system and the gut ecosystem. Additionally, the role of gut microbial improvement by dietary intervention in osteal signaling pathways has also been elucidated. This review provides unique resources from the gut microbial perspective for the discovery of new strategies for further improving treatment of bone diseases by increasing the abundance of targeted gut microbiota.

Doppler LIDAR Measurement of Wind in the Stratosphere

Jihui Dong,Hyunki Cha,김덕현,Sung Hoon Baik,Guocheng Wang,Lei Tang,Zhifeng Shu,Wenjing Xu,Dongdong Hu,Dongsong Sun 한국광학회 2010 Current Optics and Photonics Vol.14 No.3

A mobile direct detection Doppler LIDAR based on molecular backscattering for measurement of wind in the stratosphere has been developed in Hefei, China. First, the principle of wind measurement with direct detection Doppler LIDAR is presented. Then the configuration of the LIDAR system is described. Finally, the primary experimental results are provided and analyzed. The results indicate that the detection range of the designed Doppler LIDAR reached 50 km altitude, and there is good consistency between the molecular Doppler wind LIDAR(DWL) and the wind profile radar(WPR) in the low troposphere.