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劉寶全(Liu Baoquan) 가천대학교 아시아문화연구소 2006 아시아문화연구 Vol.11 No.-
After the war of Imjin Waeran, the Chosun Dynasty got a further understanding to Ming Dynasty. As the army of Ming Dynasty played a decisive role in fighting against Japanese, the bureaucrats and intelligentsias of Korea naturally looked Ming Dynasty as the savior of saving them from crisis. The consciousness of the Benefaction of Nation's Reconstruction came into existence after the great victory in Pyongyang. Out of gratitude, after the Imjin Waeran, Chosun Dynasty made the relation of submission to Ming Dynasty further deepen and consolidate. Granting that before the Imjin Waeran, Korea only looked Ming Dynastyas a Nation that they should pay tribute, then after the war, the Nation became their benefactor for nation's reconstruction. Taking this war as the turning point, the foreign policy of Chosun Dynasty changed from submission to Ming Dynasty to the conception of obligations based on the consciousness of the Benefaction of Nation's Reconstruction. This conception brought a significant impact in dealing with the relationship between Chosun Dynasty and Later Jin-Qing Dynasty. As the principle of repaying an obligation, in the war between Ming and Later Jin Dynasty. Korea can't help but assist to fighting, although it was averse to do that. It also became an important reason of Turki Insurgence. The worship to Ming Dynasty even became the ideology of Ming Worship while Against the Qing Dynasty after the perdition of Ming. The foreign policy sticking to the conception of obligations brought a negative impact to Korean politics and diplomacy in a long time.
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Baoquan Gao,Dongfang Sun,Jianjian Lv,Xianyun Ren,Ping Liu,Jian Li 한국유전학회 2019 Genes & Genomics Vol.41 No.8
Background Low salinity is one of the main factors limiting the distribution and survival of marine species. As a euryhaline species, the swimming crab (Portunus trituberculatus) is adaptive to relatively low salinity. However, the mechanisms underlying salinity stress responses in P. trituberculatus is not very clear. Objectives The primary objective of this study was to describe the salinity adaptation mechanism in P. trituberculatus. Methods The crabs were exposed to low salinity stress, and gill tissue was sampled at 0, 12, 36, 48 and 72 h and subjected to high throughput sequencing. Subsequently, we tested the accuracy and quality of the sequencing results, and then carried out GO and KEGG bioinformatics on the differentially expressed genes (DEG). Results Each sample yielded more than 1.1 Gb of clean data and 23 million clean reads. The process was divided into early (0–12 h), middle (12–48 h), and late phase (48–72 h). A total of 1971 (1373 up-regulated, 598 down-regulated), 1212 (364 up-regulated, 848 down-regulated), and 555 (187 up-regulated, 368 down-regulated) DEGs with annotations were identified during the three stages, respectively. DEGs were mainly associated with lipid metabolism energy metabolism, and signal transduction from the three stages, respectively. Conclusion A substantial number of genes were modified by salinity stress, along with a few important salinity acclimation pathways. This work provides valuable information on the salinity adaptation mechanism in P. trituberculatus. In addition, the comprehensive transcript sequences reported in this study provide a rich resource for identification of novel genes in this and other crab species.
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Nonlinear Dynamic Modeling and Control of a Small-Scale Helicopter
Baoquan Song,James K. Mills,Yunhui Liu,Caizhi Fan 제어·로봇·시스템학회 2010 International Journal of Control, Automation, and Vol.8 No.3
A test bench for experimental testing of the attitude control of a small-scale helicopter is constructed. A nonlinear model with 10 states is developed for this experimental setup. The unknown model parame-ters are estimated using the extended Kalman filter with flight test data of the helicopter operating on the test bench. In this work, it is proved that the nonlinear helicopter dynamic model may be globally feedback linearized using the dynamic feedback linearization technique. In order to satisfy multiple closed-loop performance specifications simultaneously, a controller is proposed by applying the Convex Integrated Design (CID) method to the feedback linearized model. Finally, the controller is tested in simulation demonstrating the closed-loop performance of the proposed controller.
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A Virtual Resistance Based Reactive Power Sharing Strategy for Networked Microgrid
Yixin Zhu,Baoquan Liu,Feng Wang,Fang Zhuo,Yangjie Zhao 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
Different from the traditional microgrid with a common ac bus, networked microgrid always suffers more serious reactive power sharing problems due to its complex inner configurations. In such a situation, the reactive power sharing errors among distributed generation (DG) units can’t be eliminated effectively. Thus, an advanced reactive power sharing strategy that employs communication and virtual resistance control is hereby proposed for networked microgrid. First of all, the relation between reactive power output and virtual impedance regulation (VRR) is discussed. After that, communication is introduced to assign reactive power reference to each DG unit for their respective VRR, which is able to compensate the mismatch in network. The method is immune to the load change during the regulation stage, and also to the time delay in communication channels. From the small signal analysis, it also can be seen that in the designed regulation range, VRR has no significant effect on the system stability. The feasibility and effectiveness of the proposed strategy are validated by the simulation and real time digital simulator (RTDS) test results from a 50 kVA networked microgrid system.
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