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Flexible Iterative Learning Control Based Expert System and Its Application
Liu Zuojun,Liu Zhihu,Zu Linan,Yang Peng 한국지능시스템학회 2009 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.9 No.3
A scheme of expert system based on iterative learning control is proposed. Iterative learning control can obtain control experience from the historical data to build the knowledge base of expert system. Considering some uncertain factors, a flexible measure is adopted in iterative learning control (ILC). Simulation proves the feasibility and effect of the air conditioning control expert system based on flexible iterative learning control (F-ILC). Finally, a feedback compensation unit is incorporated against irregular heavy disturbance.
Flexible Iterative Learning Control Based Expert System and Its Application
Zuojun, Liu,Zhihu, Liu,Linan, Zu,Peng, Yang Korean Institute of Intelligent Systems 2009 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.9 No.3
A scheme of expert system based on iterative learning control is proposed. Iterative learning control can obtain control experience from the historical data to build the knowledge base of expert system. Considering some uncertain factors, a flexible measure is adopted in iterative learning control (ILC). Simulation proves the feasibility and effect of the air conditioning control expert system based on flexible iterative learning control (F-ILC). Finally, a feedback compensation unit is incorporated against irregular heavy disturbance.
Graphene Enhanced Electrical Properties of Polyethylene Blends for High-Voltage Insulation
Zuojun Wei,Yaxin Hou,Chen Jiang,Haiyan Liu,Xiangrong Chen,Anyun Zhang,Yingxin Liu 대한금속·재료학회 2019 ELECTRONIC MATERIALS LETTERS Vol.15 No.5
Graphene as a novel additive in low density polyethylene (LDPE), high density polyethylene–low density polyethylene blend(10%HDPE–LDPE) and polypropylene–low density polyethylene blend (10%PP–LDPE), is investigated for promising ecofriendlyinsulating materials in high voltage cables. The composites with graphene amounts of 0, 0.002 wt%, 0.02 wt%,and 0.2 wt% are prepared by the solution mixing method. With attempt to disclose the structure–property relationships, thecomposites are extensively characterized by physical techniques including Fourier transform infrared spectroscopy, X-raydiffraction, atomic force microscopy, transmission electron microscopy, scanning electron microscopy, thermogravimetricanalysis and differential scanning calorimetry, and electrical measurements including electrical treeing, direct current conductivityand space charge distributions. Results show that graphene can significantly enhances the thermal stability of LDPEand 10%PP–LDPE, slightly decrease the degree of crystallinity, change the size of the crystal diameters, and improve thephase distribution of the polymer blends. Consequently, graphene can prolong the electrical tree initiation time and blockthe extension of electrical tree. Besides, it can modulate the trap distributions, which will further change the conductivityand ability to suppress space charge accumulations. This excellent performance of graphene could be attributed to its goodexfoliation, uniform dispersion and outstretched morphology in the polymer matrix, as well as its strong ability to captureelectrons.
Zuojun Wei,Yuran Cheng,Mengting Chen,Yuhua Ye,Yingxin Liu 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.7
Using nitrogen-doped mesoporous carbon (NMC) as the support, several NiRe bimetallic catalysts withlow metal loading of 1 wt% were designed and prepared for the selective deoxygenation of oleic acid to n-heptadecanein the absence of hydrogen. Results showed that the Ni80Re20/NMC catalyst with a Ni/Re molar ratio of 80 : 20 achievedthe highest yield of n-heptadecane (92.3%) at 330 oC for 2 h in isopropanol solvent, and at a metal/oleic acid weightratio of 1 : 333. The catalyst can be reused at least five times with slight activity loss. Combined with the results of insituXRD, HRTEM, XPS and CO2-TPD, the formation of NiRe alloy, the very fine NiRe nanoparticle size at 2.30 nm, aswell as the hydrophobic, mesoporous and weakly basic properties of the NMC support surface were demonstrated tocontribute to the excellent catalytic performance of the catalyst.
Yingxin Liu,Zuojun Wei,Tiefeng Xing,Meng Lu,Xiaonian Li 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.23 No.-
Gold catalysts supported on FeOx–TiO2 with various Fe2O3 contents were prepared by deposition– precipitation method and used for phthalic anhydride hydrogenation to phthalide. The effect of Fe2O3 on the physico-chemical property and the performance of Au/TiO2 were investigated. The reaction conditions were optimized. Adding 5 wt.% Fe2O3 on Au/TiO2 could enhance the activity and stability, which was contributed to the increase in the strength of the catalyst structure and the decrease in the loss of gold from catalyst. Using Au/5%FeOx–TiO2, phthalic anhydride conversion and phthalide selectivity reached 95.4% and 94.5%, respectively, at 190 8C and 3.0 MPa H2 for 7 h.
Li Gongjian,Wang Qin,Liu Hao,Yang Zuojun,Wu Yuhan,He Li,Deng Xiaoyuan 한국조직공학과 재생의학회 2024 조직공학과 재생의학 Vol.21 No.3
Background: Insufficient angiogenesis and the lack of skin appendages are critical challenges in cutaneous wound healing. Stem cell-fabricated cell sheets have become a promising strategy, but cell sheets constructed by a single cell type are inadequate to provide a comprehensive proregenerative microenvironment for wound tissue. Methods: Based on the communication between cells, in this study, bone marrow mesenchymal stem cells (BMSCs) and hair follicle stem cells (HFSCs) were cocultured to fabricate a composite cell sheet (H/M–CS) for the treatment of full-thickness skin wounds in mice. Results: Experiments confirmed that there is cell–cell communication between BMSCs and HFSCs, which enhances the cell proliferation and migration abilities of both cell types. Cell–cell talk also upregulates the gene expression of pro-angiogenic-related cytokines in BMSCs and pro-hair follicle-related cytokines in HFSCs, as well as causing changes in the properties of secreted extracellular matrix components. Conclusions: Therefore, the composite cell sheet is more conducive for cutaneous wound healing and promoting the regeneration of blood vessels and hair follicles. Background: Insufficient angiogenesis and the lack of skin appendages are critical challenges in cutaneous wound healing. Stem cell-fabricated cell sheets have become a promising strategy, but cell sheets constructed by a single cell type are inadequate to provide a comprehensive proregenerative microenvironment for wound tissue. Methods: Based on the communication between cells, in this study, bone marrow mesenchymal stem cells (BMSCs) and hair follicle stem cells (HFSCs) were cocultured to fabricate a composite cell sheet (H/M–CS) for the treatment of full-thickness skin wounds in mice. Results: Experiments confirmed that there is cell–cell communication between BMSCs and HFSCs, which enhances the cell proliferation and migration abilities of both cell types. Cell–cell talk also upregulates the gene expression of pro-angiogenic-related cytokines in BMSCs and pro-hair follicle-related cytokines in HFSCs, as well as causing changes in the properties of secreted extracellular matrix components. Conclusions: Therefore, the composite cell sheet is more conducive for cutaneous wound healing and promoting the regeneration of blood vessels and hair follicles.