Exponential Synchronization of Stochastic Memristive Recurrent Neural Networks Under Alternate State Feedback Control

Xiaofan Li,Jian-an Fang,Huiyuan Li 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.6

This paper solves the exponential synchronization problem of two memristive recurrent neural networks with both stochastic disturbance and time-varying delays via periodically alternate state feedback control. First, a periodically alternate state feedback control rule is designed. Then, on the basis of the Lyapunov stability theory, some novel sufficient conditions guaranteeing exponential synchronization of drive-response stochastic memristive recurrent neural networks via periodically alternate state feedback control are derived. In contrast to some previous works about synchronization of memristive recurrent neural networks, the obtained results in this paper are not difficult to be validated, and complement, extend and generalize the earlier papers. Lastly, an illustrative example is provided to indicate the effectiveness and applicability of the obtained theoretical results.

Robust Model Predictive Control for Multi-phase Batch Processes with Asynchronous Switching

Hui Li,Lijun Song,Xueying Jiang,Huiyuan Shi,Chengli Su,Ping Li 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.1

A robust asynchronous switching model predictive controller is designed for multi-phase batch processes with uncertainties, unknown disturbances and time-varying set-point. Firstly, in view of the influence of timevarying set-point and disturbances, an asynchronous switching model with stable and unstable cases is established. Based on the switching model, a robust asynchronous switching model predictive control law is designed. Secondly, by using relevant theories and methods, the sufficient conditions with the form of linear matrix inequality (LMI) are given to ensure that the multi-phase batch processes are asymptotically stable at each phase and exponentially stable at each batch. Then, these LMI conditions are solved online to obtain the control gain of each phase, the shortest running time of each stable case, and the longest running time of each unstable case. Finally, the effectiveness and feasibility of the proposed method are verified by taking the injection molding process as an example.

Transcriptome Profile Analysis of Cadmium Tolerance in Chinese Flowering Cabbage

Jiewei Wang,Huiyuan Li,Dandan Zou,Jinfeng Zhao,Lianxue Fan,Tao Wu 한국원예학회 2017 Horticulture, Environment, and Biotechnology Vol.58 No.1

Chinese flowering cabbage (Brassica parachinensis L.) is an important leafy vegetable crop that can accumulatehigh levels of cadmium (Cd) and can thus be easily contaminated by this heavy metal. In this study, we performedgenome-wide transcriptional profiling of Cd tolerance in Cd-tolerant cultivar ‘LB70’ using Solexa sequencing to identifygenes and pathways involved in Cd tolerance in Chinese flowering cabbage. Profiling analysis revealed numerous changesin gene expression in response to Cd treatment, including 1669 genes that were downregulated and 1404 genes that wereupregulated. Gene ontology analysis showed that these differentially expressed genes were mainly involved in binding,catalytic processes, metabolism, cellular processes, single-organism processes, biological regulation, localization, andstimulus responses. Several known important Cd tolerance-related genes, such as HMA3, HMA4, and Nramp1, werealso identified. Pathway analysis suggested that two potential novel pathways, namely, the viral carcinogenesis andParkinson’s disease pathways, might be involved in Cd tolerance in Chinese flowering cabbage. The genes andpathways identified in this study provide an important basis for future studies on the molecular mechanism of Cdtolerance in Chinese flowering cabbage.

A techno-economic sizing method for PV/battery/grid hybrid solar systems for residential buildings

Yuxin Zheng,Huiyuan Shen,Jie Li 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.11

The increasing share of the distributed renewable energy in power generation is an important development direction in the electrical power system. However, its intermittent and nonprogrammable nature is a major challenge. Battery storage is providing an effective solution to solve these issues. In the paper, the PV/battery/grid (PVBG) system is established for residential buildings, and the optimal combination of PV size and battery size was obtained by techno-economic analysis. Firstly, self-sufficiency ratio (SSR) and self-consumption ratio (SCR) as the technical indicators were applied to evaluate and analyze the performance of different PV/battery/grid systems. Secondly, the levelized cost of energy (LCOE) as an important economic indicator was applied to optimize PVBG system configuration by using the particle swarm optimization (PSO) technique. PVBG systems were simulated under the actual electricity price and feed-in-tariff of a typical power market. Lastly, the optimal PV and battery system combination was obtained by maximizing SCR and SSR and minimizing LCOE. The results showed that integrating battery energy storage can improve SCR and SSR. The PVBG systems with a higher SSR resulted in more PV production to sell back to the grid and reduced the usage rate of the battery. Eight cases with different technical indicators were compared and discussed. The results showed that the LCOE of the PVBG system ranged from 0.351 to 0.769 RMB/kWh for the residential building studied. According to the technical and economic indicators, the optimal sizes of PV and battery were respectively determined to be 6696 Wp and 2366 Wh for the case studied.

Enhanced adsorption of Orange II on bagasse-derived biochar by direct addition of CTAB

Guo-Ting Liang,Huiyuan Li,Xiao Mi,Weigao Zhao 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.8

Surface charge properties of an adsorbent always play an important role for the removal of contaminants from water. A cationic surfactant hexadecyl tri-methyl ammonium bromide (CTAB) was involved into adsorptive removal of Orange II (ORII) by bagasse biochars to realize an in-situ modification and an enhanced adsorption capability. Adsorption capacity of biochar (BC600) improved significantly from 1.66mg/g in the absence of CTAB to 4.42mg/g in the presence of 2.0mg/L CTAB. A more hydrophobic surface of bagasse biochar was favorable for the dye uptake in the presence of CTAB. Linear pseudo-second-order kinetic model fitted the kinetics data better at three pH conditions than pseudo-first-order kinetic model, whether in the presence and absence of CTAB. Both nonlinear pseudo-first-order and pseudo-second-order kinetic models were suitable to describe the experimental data. The maximal adsorption capacity in the absence of CTAB was very limited (41.4mg/g), while the adsorption isotherm curve in the presence of CTAB was almost linear, indicating a strong adsorption capability due to the introduction of CTAB. Direct addition of CTAB into wastewater is a potential technique for the enhanced removal of negatively-charged pollutants by bagasse biochar.

THE EFFECT OF ACUTE HYPOXIA ON SOD IN THE HUMAN BODY

Yu Qifu,Wang Huiyuan,Li Minggao,Li Zhangqing,Yu Shonghai 한국항공우주의학협회 1991 항공우주의학회지 Vol.1 No.1

PVA Hydrogel Functionalization via PET-RAFT Grafting with Glycidyl Methacrylate and Immobilization with 2-Hydroxypropyltrimethyl Ammonium Chloride Chitosan via Ring-Open Reaction

Jinsheng Zhou,Yanming Lin,Lin Ye,Ling Wang,Li Zhou,Huiyuan Hu,Qilong Zhang,Hui Yang,Zhongkuan Luo 한국고분자학회 2019 Macromolecular Research Vol.27 No.11

To solve the biofouling problem of polyvinyl alcohol (PVA) hydrogel as the artificial cornea, glycidyl methacrylate (GMA) and 2-hydroxypropyltrimethyl ammonium chloride chitosan (HACC) were grafted on the surface of PVA hydrogel via a new method of photoinduced electron transfer–reversible addition fragmentation chain transfer (PET-RAFT) polymerization and ring-open reaction. Both attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), scanning electron microscope (SEM), and thermogravimetric analysis (TGA) confirmed that GMA and HACC were successfully grafted on the surface of PVA hydrogel. A series of experiments to test the hydrophilicity of PVA hydrogel showed that it became hydrophobic due to the introduction of hydrophobic groups after grafting with GMA and HACC. In addition, cytotoxicity in vitro of PVA-g-p(GMA-HACC) hydrogel could be considered as not cytotoxicity according to ISO 10993-5: 2009. The anti-fouling property of hydrogel decreased after grafting with GMA due to the hydrophobic surface, while increased after grafting with HACC due to the steric repulsion of p(GMA-HACC) polymer brush. It’s no doubt that PET-RAFT was a feasible and reliable surface modification method which could be used in many biomolecules due to the excellent advantages.

Lactobacillus paracasei subsp. paracasei LC01 Positively Modulates Intestinal Microflora in Healthy Young Adults

Hao Zhang,Jing Sun,Xianting Liu,Chuan Hong,Yuanbo Zhu,Aiping Liu,Siqi Li,Huiyuan Guo,Fazheng Ren 한국미생물학회 2013 The journal of microbiology Vol.51 No.6

Lactobacillus paracasei subsp. paracasei LC01 (LC01) can tolerate intestinal stresses and has antioxidant activity. To evaluate the effect of the bacterium on human intestinal microflora,a randomized, double-blind, placebo-controlled human trial was carried out. Fifty-two healthy adult volunteers were randomized equally to two groups. One group consumed 12% (wt/vol) skimmed milk supplemented with 1010 CFU of LC01 each day for the 4-week treatment period,and then consumed placebo in the next treatment period,separated by a 2-week washout. The other group followed the reverse order. Group-specific real-time PCR and biochemical analyses was used to determine the intestinal bacterial composition of fecal samples collected at the end of every period, and the concentration of short-chain fatty acids and ammonia. A significant inhibition in fecal Escherichia coli and increase in Lactobacillus, Bifidobacterium, and Roseburia intestinalis were observed after consumption of LC01. Acetic acid and butyric acid were significantly higher in the probiotic stage and fecal ammonia was significantly lower. The results indicated a modulation effect of LC01 on the intestinal microflora of young adults, suggesting a beneficial effect on bowel health. LC01 may have potential value as a probiotic.