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Transcriptome analysis of the livers of ducklings hatched normally and with assistance
Yali Liu,Shishan He,Tao Zeng,Xue Du,Junda Shen,Ayong Zhao,Lizhi Lu 아세아·태평양축산학회 2017 Animal Bioscience Vol.30 No.6
Objective: “Hatchability” is an important economic trait in domestic poultry. Studies on poultry hatchability focus mainly on the genetic background, egg quality, and incubation conditions, whereas the molecular mechanisms behind the phenomenon that some ducklings failed to break their eggshells are poorly understood. Methods: In this study, the transcriptional differences between the livers of normally hatched and assisted ducklings were systematically analyzed. Results: The results showed that the clean reads were de novo assembled into 161,804 and 159,083 unigenes (≥200-bp long) by using Trinity, with an average length of 1,206 bp and 882 bp, respectively. The defined criteria of the absolute value of log2 fold-change ≥1 and false discovery rate≤0.05 were differentially expressed and were significant. As a result, 1,629 unigenes were identified, the assisted ducklings showed 510 significantly upregulated and 1,119 significantly down-regulated unigenes. In general, the metabolic rate in the livers of the assisted ducklings was lower than that in the normal ducklings; however, compared to normal ducklings, glucose- 6-phosphatase and ATP synthase subunit alpha 1 associated with energy metabolism were significantly upregulated in the assisted group. The genes involved in immune defense such as major histocompatibility complex (MHC) class I antigen alpha chain and MHC class II beta chain 1 were downregulated in the assisted ducklings. Conclusion: These data provide abundant sequence resources for studying the functional genome of the livers in ducks and other poultry. In addition, our study provided insight into the molecular mechanism by which the phenomenon of weak embryos is regulated.
Calculation of PI Controller Stable Region Based on D-Partition Method
Liu Jinggong,Xue Yali,Li Donghai 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
Based on D-partition method, a fast calculation approach for PI controller stable region is introduced. The boundary of the PI stable region is calculated first using D-partition method, and then several sets of equations and inequalities are introduced sequentially to judge which side of the boundary is stable. The approach is simple, and can be applied to any self-stable systems with or without time-delays, while only the process frequency responses are needed. To illustrate its feasibility, some examples are given.
Tuning ADRC for Multi-Variable System Based on Existing PID Parameters
Chunzhe Zhao,Yali Xue,Chun-E Huang 제어로봇시스템학회 2016 제어로봇시스템학회 국제학술대회 논문집 Vol.2016 No.10
Due to the long-time engineering practice, the existing PID controllers and their parameters contain the valuable information about the models of the industrial processes. Such information is absorbed to simplify the design and tuning process of the active disturbance rejection controller (ADRC) in this study. If one channel of the multivariable system is stabilized by PID, then ADRC can be built to replace the PID scheme, and the ADRC parameters can be calculated from the PID parameters. This technique can be operated channel by channel until all channels are stabilized by ADRC, which is verified by simulations. Moreover, the simulations imply that the presented ADRC design and tuning method can generate the feasible parameters efficiently for the plants with unknown models.
Frequency Response Analysis on Modified Plant of Extended State Observer
Yuqiong Zhang,Yali Xue,Donghai Li,Zhiqiang Gao,Haiming Niu,Huanpao Huang 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10
The active disturbance rejection control (ADRC) framework gives birth to a new concept, the modified plant (MP), describing the dynamics after the total disturbance is estimated and cancelled approximately. Ideally the modified plant is in integral form, to greatly simplify and fix the controller design, even though actual plant contains higher-order dynamics or dead time. This paper investigates that when such processes are modified into the integral, how the parameters of the extended state observer (ESO) impact on the dynamic characteristics and stability of the MP. Frequency-domain analyses show that the MP can gradually approach the integral form through parameters tuning. However, it should be cautious that an aggressive set of parameters may lead to an unstable modified plant in the presence of order mismatch.
Fanfeng Meng,Xue Li,Jian Fang,Yalong Gao,Lilong Zhu,Guiju Xing,Fu Tian,Yali Gao,Xuan Dong,Shuang Chang,Peng Zhao,Zhizhong Cui,Zhihao Liu 대한수의학회 2016 Journal of Veterinary Science Vol.17 No.4
The genomic diversity of Avian leukosis virus subgroup J (ALV-J) was investigated in an experimentally infected chicken. ALV-J variantsin tissues from four different organs of the same bird were re-isolated in DF-1 cells, and their gp85 gene was amplified and cloned. Ten clonesfrom each organ were sequenced and compared with the original inoculum strain, NX0101. The minimum homology of each organ rangedfrom 96.7 to 97.6%, and the lowest homology between organs was only 94.9%, which was much lower than the 99.1% homology of inoculumNX0101, indicating high diversity of ALV-J, even within the same bird. The gp85 mutations from the left kidney, which contained tumors,and the right kidney, which was tumor-free, had higher non-synonymous to synonymous mutation ratios than those in the tumor-bearing liverand lungs. Additionally, the mutational sites of gp85 gene in the kidney were similar, and they differed from those in the liver and lung, implyingthat organ- or tissue-specific selective pressure had a greater influence on the evolution of ALV-J diversity. These results suggest that moreALV-J clones from different organs and tissues should be sequenced and compared to better understand viral evolution and molecularepidemiology in the field.
A Robust Control Methodology based on Active Disturbance Rejection Control and Input Shaping
Qingru Cui,Yali Xue,Donghai Li,Li Sun 제어로봇시스템학회 2018 제어로봇시스템학회 국제학술대회 논문집 Vol.2018 No.10
Active disturbance Rejection Control (ADRC) is widely used in a variety of fields during past 20 years. The core component, Extended State Observer (ESO), is designed to estimate the total disturbance and perturbation as well as the system states which are not unmeasurable. The total disturbances are lumped and then compensated in the control law in real time. Thereby the algorithm is independent on the exact model and precise information of plant. To further enhance its performance, input-shaping (IS), as a vibration suppression feed forward method, is used to reduce the overshoot. The simulation results demonstrate that the improved ADRC has a fast response capability and maintains a considerable response of disturbance rejection. It is concluded that the combination of the two techniques are applicable in the cases where the fast disturbance rejection and non-overshoot set-point tracking is favored without a precise model at hand.
Fan Zhang,Yi Zhang,Yali Xue 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.5
In order to deal with various control objectives in process, such as economic and regulating preferences, the multi-objective predictive control (MOPC) is under investigation in this manuscript. The proposed method has the hierarchical structure: in the upper layer fuzzy control is devised for the compromise point of the process under multi-objective consideration at steady-state, which provides stability constraint for the MOPC; the formulated MOPC in the lower layer directly optimizes distance to the utopia point. The proposed fuzzy control based multiobjective predictive control can simultaneously reduce the computation burden and increase the multi-objective performance. Effectiveness and merits are verified on the typical continuous flow stirred-tank reactor process.
Active Disturbance Rejection Control For Circulating Fluidized Bed Boiler
Yuqiong Zhang,Donghai Li,Yali Xue 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
The Circulating Fluidized Bed Boiler (CFBB) is a multivariable coupled, long time-delay, large inertia system. In this paper, a decentralized control system using active disturbance rejection control (ADRC) strategy is proposed for a nonlinear CFBB model. The designed control system has a fully decentralized structure and it is free of complex decouplers, which is difficult to achieve in actual plants. With ADRC method, the interaction of two control loops, the higher orders, uncertainties and unmodeled dynamics are treated as general disturbance, which is estimated by Extended State Observer (ESO) and then actively compensated. Some simulation results illustrate that the designed control system has good performance when the power set point is varied in a wide range and a disturbance of the set point of main steam pressure is added into the CFBB system. Besides, the same parameters are adequate on varied operating points, indicating the strong robustness of the controller. The proposed decentralized control system has advantage in easy tuning procedure, simple structure and its disturbance-rejection capability.
Active Disturbance Rejection Control for Fluidized Bed Combustor
Zhenlong Wu,Donghai Li,Yali Xue,Lingmei Wang,Jing Wang 제어로봇시스템학회 2016 제어로봇시스템학회 국제학술대회 논문집 Vol.2016 No.10
Active disturbance rejection control (ADRC) is applied in fluidized bed combustor (FBC) facing some control difficulty. By analyzing the difficulties, ADRC controllers are designed for the power loop and the bed temperature loop of FBC system. The simulation demonstrates both loops with ADRC have a better tracking speed and a stronger robustness, the power loop can inhibit the input and output disturbance quickly and the temperature loop has a slight advantage in disturbance rejection. Besides, manipulated variables is analyzed by the phase diagrams.
Disturbance Rejection of Superheated Steam Temperature in a Utility Boiler
Li Sun,Donghai Li,Yong Sun,Yali Xue,Kwang Y. Lee 제어로봇시스템학회 2016 제어로봇시스템학회 국제학술대회 논문집 Vol.2016 No.10
This paper derived a model for the superheated steam temperature based on the open-loop step response. A cascaded control structure based on disturbance observer (DOB) is proposed to accommodate the control difficulties. The simulation results show the great performance improvement compared with the conventional cascaded control structure. This paper is a preliminary research to the cascaded DOB control structure. Much improvement, theoretic analysis and experimental demonstration will be carried out in the future.