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Illumina-sequencing based transcriptome study of coat color phenotypes in domestic goats
Yongdong Peng,Xiaohui Liu,Liying Geng,Ruxue Ma,Lisha Li,Jingshi Li,Chuansheng Zhang,Zhengzhu Liu,Yuanfang Gong,Xianglong Li 한국유전학회 2017 Genes & Genomics Vol.39 No.8
This study performed a comprehensive expression profiling of genes expressed in the skin of goats with three different coat colors by Illumina Sequencing. A total of 91 significantly expressed genes were detected when comparing gray skin to white skin library and these included 74 up-regulated and 17 down-regulated genes in gray skin. There were 67 differentially expressed genes between brown skin and white skin libraries, 23 of which were up-regulated and 44 were down-regulated in brown skin. When we compared brown and gray libraries, 154 differentially expressed genes were found, of which 33 showed higher expression and 121 showed lower expression in brown skin. To our surprise, MC1R, MITF, TYR and KIT showed no significant difference in expression between the goats with three skin colors, whereas ASIP was detected in white skin but not in dark skins. In this study, PMEL, TRPM1, TYRP1 and DCT were significantly upregulated in brown goat skin compare with gray and white skins. PMEL showed higher expression in gray goat skin compared with white goat skin, whereas there were no significant differences in the expression of TYRP1, TRPM1 and DCT between gray and white skin samples. In addition, ELOVL3 showed higher expression in gray goat skin than in brown and white skins, whereas there was no significant differences in the expression of ELOVL3 between brown and white skin samples. These results expand our understanding of the complex molecular mechanisms of skin physiology and melanogenesis in goat and provide a foundation for future studies.
Recognizing Comparative Sentences from Chinese Review Texts
Wei Wang,TieJun Zhao,GuoDong Xin,YongDong Xu 보안공학연구지원센터 2014 International Journal of Database Theory and Appli Vol.7 No.5
Comparisons play an important role in making decisions by referring to the comparative opinions of opinion holders in earlier customer reviews. Recognizing comparative sentences from review texts contributes to opinion mining and information recommendation. Our objective is to automatically recognize comparative sentences from Chinese text documents. In this paper, an effective approach is proposed based on comparative patterns to recognize comparative sentences in Chinese. Our experiments on customer-generated product reviews show that the proposed approach is effective.
Guoying Wei,Yongdong Jin,Hongliang Ge,Jiuli Luo 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.4
The Belousov-Zhabotinskii system measured by a Pt electrode is investigated under external electrode current constraint. A dynamical analysis of the electrode reaction phase has been made by means of a linearized stability criterion valid for three-variable system. It turns out that limit cycle oscillatory regime and dynamical behaviors of the electrode reaction phase have been degenerated under periodical electrode current.
Fabrication and Characterization of Aligned Fibrin Nanofiber Hydrogel Loaded with PLGA Microspheres
Shenglian Yao,Yongdong Yang,Xiumei Wang,Luning Wang 한국고분자학회 2017 Macromolecular Research Vol.25 No.6
Developing novel biomaterials that deliver multiple regulatory signals is crucial to tissue regeneration by creating an ideal regenerative microenvironment. The purpose of the study is to develop a bioactive hydrogel delivering biomimetic joint regulatory cues of low elasticity, aligned structure, and neurotropic factors for nerve regeneration. Here a hierarchically aligned fibrin nanofiber hydrogel (AFG) loaded with drug-encapsulated poly(DL-lactic-co-glycolic acid) (PLGA) microspheres (PLGA@AFG) was prepared via electrospray and electrospinning. Firstly, drug-nanoencapsulated PLGA microspheres were prepared by electrospray method. Then electrospinning process was used to fabricate the aligned nanofiber hydrogel loaded with PLGA microspheres. Scanning electron microscope (SEM) and laser scanning confocal microscope were engaged to characterize the morphology and drug distribution of the composite hydrogel. The drug release behavior was observed by the use of Congo red as the model drug in vitro. The results proved the composite hydrogel maintained the aligned structure and soft properties of the AFG, and achieved a more reasonable drug release behavior for reducing the initial burst release comparing to the PLGA microspheres. Human umbilical mesenchymal stem cells (hUMSCs) were cultured on the PLGA@AFG composite hydrogel. The stem cells exhibited remarkable elongation along the long axis of the AFG with a bipolar morphology, indicating the good biocompatibility of the PLGA@AFG and the regulatory effect of the aligned structure on cell attachment.
Three-level Inverter Direct Torque Control of Induction Motor Based on Virtual Vectors
Zhuohui Tan,Yongdong Li,Hu Hu,Min Li,Jie Chen 전력전자학회 2001 ICPE(ISPE)논문집 Vol.2001 No.10
Multilevel inverter has attracted great interest in high-voltage high-power field because of its less distorted output. In this paper, a direct torque control (DTC) technique based on a three-level neutral-point-clamped (NPC) inverter is presented. In order to solve the intrinsic neutral-point voltage-balancing problem and to obtain a high performance DTC, a special vector selection method is introduced and the concept of virtual vector is developed. By using the proposed PWM strategy, a MRAS speed sensor-less DTC drive can be achieved without sensing the neutral-point voltage. The strategy can be verified by simulation and experimental results.<br/>
Novel Position Controller for PMSM Based on State Feedback and Load Torque Feed-Forward
Zedong Zheng,Yongdong Li,Maurice Fadel 전력전자학회 2011 JOURNAL OF POWER ELECTRONICS Vol.11 No.2
In this paper, a novel position controller based on state feedback and feed-forward is proposed. Traditional position and speed controllers are replaced by a single controller with the position and speed as state feedbacks, and the position command and load torque as feed-forwards. The feedback and feed-forward gains are obtained by analytic modeling and design. The load torque, rotor speed and position are estimated by an observer based on a Kalman filter (KF) with a low resolution mechanical position sensor. Feed-forward compensation by an estimated load torque is used to improve the dynamic performance during load torque changes.
$K$-g-frames and stability of $K$-g-frames in Hilbert spaces
Dingli Hua,Yongdong Huang 대한수학회 2016 대한수학회지 Vol.53 No.6
A $K$-g-frame is a generalization of a g-frame. It can be used to reconstruct elements from the range of a bounded linear operator $K$ in Hilbert spaces. $K$-g-frames have a certain advantage compared with g-frames in practical applications. In this paper, the interchangeability of two g-Bessel sequences with respect to a $K$-g-frame, which is different from a g-frame, is discussed. Several construction methods of $K$-g-frames are also proposed. Finally, by means of the methods and techniques in frame theory, several results of the stability of $K$-g-frames are obtained.
K-G-FRAMES AND STABILITY OF K-G-FRAMES IN HILBERT SPACES
Hua, Dingli,Huang, Yongdong Korean Mathematical Society 2016 대한수학회지 Vol.53 No.6
A K-g-frame is a generalization of a g-frame. It can be used to reconstruct elements from the range of a bounded linear operator K in Hilbert spaces. K-g-frames have a certain advantage compared with g-frames in practical applications. In this paper, the interchangeability of two g-Bessel sequences with respect to a K-g-frame, which is different from a g-frame, is discussed. Several construction methods of K-g-frames are also proposed. Finally, by means of the methods and techniques in frame theory, several results of the stability of K-g-frames are obtained.
Novel Position Controller for PMSM Based on State Feedback and Load Torque Feed-Forward
Zheng, Zedong,Li, Yongdong,Fadel, Maurice The Korean Institute of Power Electronics 2011 JOURNAL OF POWER ELECTRONICS Vol.11 No.2
In this paper, a novel position controller based on state feedback and feed-forward is proposed. Traditional position and speed controllers are replaced by a single controller with the position and speed as state feedbacks, and the position command and load torque as feed-forwards. The feedback and feed-forward gains are obtained by analytic modeling and design. The load torque, rotor speed and position are estimated by an observer based on a Kalman filter (KF) with a low resolution mechanical position sensor. Feed-forward compensation by an estimated load torque is used to improve the dynamic performance during load torque changes.