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Weixin Li,Li-Xia Mu,Leiyan Wu,Yu-Xiao Zou,Hai-Feng Zhao,Sen-Tai Liao 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.2
The effects of silkworm pupa protein hydrolysates (SPPHs) on the apoptosis of MGC-803 gastric cancer cells were investigated in this study. The role of mitochondrial-dependent apoptosis in SPPHs-dependent inhibition of MGC-803 cell viability was also explored. SPPHs were found to induce apoptosis in MGC-803 cells with an IC 50 of 0.30 mg/ml. A series of changes in cellular organelle structural were observed during MGC-803 cell apoptosis that included mitochondrial swelling, vacuolation and rupture. These changes may ultimately impact on metabolic energy supply in MGC-803 cells. The expression of the pro- and anti-apoptotic proteins Bcl-2 and Bax, and the activation of cytochrome c (Cyt C), Caspase-3 and Caspase-9 were altered following induction of apoptosis by SPPHs in MGC-803 cells. Moreover, the increase in the ratio of Bax to Bcl-2 expression is known to play an important role in the activation of the mitochondrial-dependent apoptotic pathway.
Weixin Wang,Fengjiang Wu,Ke Zhao,Li Sun,Jiandong Duan,Dongyang Sun 전력전자학회 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.4
Battery energy storage devices (ESDs) have become more and more commonplace to maintain the stability of islanded power systems. Considering the limitation in inverter capacity and the requirement of flexibility in the ESD, the droop control was implemented in paralleled ESDs for higher capacity and autonomous operation. Under the conventional droop control, state-of-charge (SoC) errors between paralleled ESDs is inevitable in the discharging operation. Thus, some ESDs cease operation earlier than expected. This paper proposes an adaptive accelerating parameter to improve the performance of the SoC error eliminating droop controller under the constraints of a microgrid. The SoC of a battery ESD is employed in the active power droop coefficient, which could eliminate the SoC error during the discharging process. In addition, to expedite the process of SoC error elimination, an adaptive accelerating parameter is dedicated to weaken the adverse effect of the constraints due to the requirement of the system running. Moreover, the stability and feasibility of the proposed control strategy are confirmed by small-signal analysis. The effectiveness of the control scheme is validated by simulation and experiment results.
Wang, Weixin,Wu, Fengjiang,Zhao, Ke,Sun, Li,Duan, Jiandong,Sun, Dongyang The Korean Institute of Power Electronics 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.4
Battery energy storage devices (ESDs) have become more and more commonplace to maintain the stability of islanded power systems. Considering the limitation in inverter capacity and the requirement of flexibility in the ESD, the droop control was implemented in paralleled ESDs for higher capacity and autonomous operation. Under the conventional droop control, state-of-charge (SoC) errors between paralleled ESDs is inevitable in the discharging operation. Thus, some ESDs cease operation earlier than expected. This paper proposes an adaptive accelerating parameter to improve the performance of the SoC error eliminating droop controller under the constraints of a microgrid. The SoC of a battery ESD is employed in the active power droop coefficient, which could eliminate the SoC error during the discharging process. In addition, to expedite the process of SoC error elimination, an adaptive accelerating parameter is dedicated to weaken the adverse effect of the constraints due to the requirement of the system running. Moreover, the stability and feasibility of the proposed control strategy are confirmed by small-signal analysis. The effectiveness of the control scheme is validated by simulation and experiment results.
Design of PID Controller Based on ELM and Its Implementation for Buck Converters
Yang Lu,WeiXin Yu,JunNian Wang,Dan Jiang,RuiQi Li 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.7
Buck converter is a kind of converter device with high efficiency, wide adjustable output voltage, small loss, small size and light weight. Its circuit has nonlinearity and will exhibit abundant nonlinear phenomena with the change of circuit parameters, resulting in unstable output voltage and being susceptible to load and external disturbances. Therefore, a control method based on Extreme Learning Machine (ELM) combined with a proportionalintegral-derivative (PID) controller is proposed in this paper and used for output voltage control of buck converter. Firstly, the mathematical model of buck converter in Continuous Conduction Mode (CCM) is established by the state space averaging method. Then the PID tuning algorithm is designed in combination with ELM, and the stability analysis of the model is carried out. Finally, the simulation experiment is carried out under different disturbances. By comparing with the open-loop control strategy, the effectiveness of the proposed ELM-PID control strategy is verified, indicating that the proposed method can achieve the stability of output voltage and good dynamic response.
Qianqian Liu,Junqing Li,Weixin Liu 한국원예학회 2021 Horticulture, Environment, and Biotechnology Vol.62 No.1
Chinese cabbage ( Brassica campestris L. ssp. pekinensis ) is a widely cultivated vegetable crop in eastern Asia. The fl avor ofChinese cabbage was mostly aff ected by soluble sugar content. To make clear its accumulation and regulation mechanism,the content of diff erent sugars in the internal blade (IB), the internal midrib (IM), the external blade (EB) and the externalmidrib (EM) of the leafy head were determined during the leafy head formation. The results showed that fructose was themajor sugar accumulated in the internal tissues, followed by glucose. IM was the main tissue of sugar accumulation with thehighest contents of total soluble sugar and hexose at harvest. RNA sequencing data of the four tissues at 90 DAS showed thatthe number of diff erentially expressed genes (DEGs) in IB and IM was the least (2408), while the number of DEGs betweenthe external and internal tissues ranged from 6037 to 8674. The enzyme genes diff erentially expressed in ‘starch and sucrosemetabolism’ pathway was detected during the leafy head development. The expression of two sucrose synthase (SUS) genes,SUS1a (Bra002332) and SUS1b (Bra006587), were always higher in IM than in the other tissues, and positively correlatedwith the content of total soluble sugar and hexose, respectively. SUS1 was considered to play an important role in leafy headdevelopment and sugar accumulation in Chinese cabbage.
Xiaogang Zheng,Liping Wang,Yuanliang Zhou,Meiyin Luo,Hongyan Li,Zongyang Bo,Weixin Zheng,Chenggong Chang,Jing Wen,Jinmei Dong 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.126 No.-
Biochar-based composites have been intensively applied in wastewater treatment. To boost theadsorption-photocatalytic capacity of biochar for dyes elimination, S-doped biochar was commodifiedby NiS and MgO (NiS-Mg/S-BC) via the one-pot sulfurization at high temperature. The functional groupsin NiS-Mg/S-BC provided the abundant vacant sites for RhB adsorption and photocatalysis, and the junctioninterface among NiS, MgO, and S-doped biochar was likely to form the channels for the separationand transfer of photo-induced e-/h+ pairs. NiS-Mg/S-BC presented the better adsorption-photocatalyticcapacity of RhB than S-doped biochar, NiS and MgO modified biochar. Langmuir and second-order modelswell described the adsorption behaviors of NiS-Mg/S-BC. The removal efficiency of optimal 2b-NiS-Mg/SBCfor 400 mg/L RhB solution was 96.98% within 120 min, and its adsorption capacity based on secondordermodel was 802.49 mg g1. The photo-corrosion induced to the declined removal efficiency of 2b-NiS-Mg/S-BC to 94.13% after five cycles.