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BIBO Stabilization of T-S Fuzzy Neutral Systems by LMI Approach
Guihua Li,Jun Yang,Yan Zeng 제어·로봇·시스템학회 2010 International Journal of Control, Automation, and Vol.8 No.4
In this paper, the problem of bounded-input bounded-output (BIBO) stabilization for a class of Takagi-Sugeno (T-S) fuzzy neutral systems is considered. Based on the Lyapunov-Krasovskii func-tional, the descriptor model transformation and the linear matrix inequality (LMI) approach, sufficient conditions guaranteeing BIBO stabilization of the T-S fuzzy neutral systems are established in terms of LMIs. And an explicit expression of the desired controller is readily given when these LMIs are feasible. Finally, a simulation example is provided to demonstrate the effectiveness of the proposed approach.
Guihua Meng,Jiayu Yan,Jianning Wu,Weifang Zhang,Yixi Wang,Qian Wang,Zhiyong Liu,Xuhong Guo 한국섬유공학회 2020 Fibers and polymers Vol.21 No.2
Water pollution severely effects human health and ecosystems. This paper presents a simple method of superhydrophobic cotton fabric fabrication for oil/water separation, We implemented thiol-ene reaction using 3-(Trimethoxysilyl)propyl methacrylate (TMSPMA) and n-dodecyl mercaptan (NDM). to synthesize low surface energy hydrophobic modifier. Superhydrophobic cotton fabrics demonstrated excellent superhydrophobicity, which makes them outstanding materials for continuous and simultaneous removal of insoluble and emulsified oils. Chemical composition, morphology, and hydrophobicity of these cotton fabrics were confirmed by FTIR spectra, scanning electron microscopy (SEM), and water contact angle measurements, respectively. Fabrics samples maintained their superhydrophobic propertieseven after 20 cycles, separation efficiency was still above 98.5 %. Our superhydrophobic cotton fabric demonstrated a remarkable separation of emulsified oil. We believe that our quick and environmentally friendly method can be used in variety of applications involving water-in-oil emulsion separation and oil purification.
Guihua Liu,Lei Guo,Wei Wang,Frede Blaabjerg 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
The active damping method based on proportional voltage feedforward is usually used to solve the inherent resonance and low-order harmonics of LCL filter. However, in the case of low short-circuit capacity and high impedance of weak grid, the grid impedance has a great influence on the control performance, especially for highfrequency inverters based on SiC MOSFET. In order to improve the stability of the inverter, this paper proposes a robust composite control method, which combines gridconnected current feedback active damping, full voltage feedforward and improved current controller. This method can not only adapt to the wide range of changes in grid impedance, but also suppress background harmonics. The simulation and experimental results verify the effectiveness of the proposed method.
Lu, Guihua,Li, Hongsheng,Xiao, Jianjun,Li, Zhihao,Xu, Minhang Techno-Press 2016 Ocean systems engineering Vol.6 No.3
With more than 100 years exploration and development of offshore oil, more and more offshore oil fields will gradually lose the economic profit to operate. In this article, to take the target oil field for example, the procedure of decommissioning for FPSO, TCMS, subsea system and well abandonment have been analyzed. Meanwhile, the environment impact and mitigation measure have been proposed. The successful project experience will provide a guide line for the offshore facilities decommissioning and abandonment.
Analysis on B to B Product Strategy in China
Li Guihua 한국마케팅과학회 2005 한국마케팅과학회 학술대회 발표 논문집 Vol.- No.-
According to the business survey, we found that there are some problems in the practice of the B to B product strategy of China. The business should take the following countermeasures: Setting up a marketing concept of customer oriented; Upgrade the integration power of product strategy; Do well the job of market segmentation and product positioning; Improve the rate of successful new product development through reinforcing marketing research, innovating the process of product development and increasing consumers’ participation.
在线教育平台游戏化元素对持续使用的影响机制研究: 基于S-O-R视角
张贵花 ( Guihua Zhang ),曹峻玮 ( Junwei Cao ),刘栋 ( Dong Liu ) 사단법인 아시아문화학술원 2021 인문사회 21 Vol.12 No.6
近几年在线教育快速发展, 特别是随着COVID-19的爆发, 越来越多的⼈开始通过在线教育平台进行学习。本研究从在线教育平台中的游戏元素切入, 分析影响⽤户持续使用的因素。基于刺激机体反应框架(S-O-R Framework), 在先行研究的基础上, 提出假设, 建⽴研究模型。对在线教育⽤户进⾏问卷调查后, 使⽤PLS-SEM以及SmartPls3.0进行假设验证。研究结果表明游戏化元素对在线教育用户的享受和持续使用有显著的积极影响, 同时发现用户的适应性显著的正向调节了游戏化元素和用户享受之间的关系。研究指出, 为了更好地激发用户兴趣, 在线教育企业应结合课程内容和用户特点, 精心设计游戏化体验。 Online education is developing rapidly in recent years. Especially with the outbreak of COVID-19, more and more people begin to learn through online education platform. This research starts with the elements of gamification in online education and analyzes the factors affecting users’ continuous use. Based on the Stimulus-Organism-Response Framework (SOR) and the previous researches, the hypothesis was put forward, and the research model was established. After the questionnaire survey of online education users, PLS-SEM and smartpls3.0 were used to verify the hypothesis. The research results show that gamification elements have a significant positive impact on the enjoyment and continuous use of online education users, and it is also found that users’ adaptability significantly positively regulates the relationship between gamification elements and users’ enjoyment. Research points out that in order to better stimulate user interest, online education companies should carefully design gamification experience in combination with course content and user characteristics.
Stabilizer quantum codes over the Clifford algebra
Zeng, Guihua,Li, Yuan,Guo, Ying,Lee, Moon Ho The Institute of Physics 2008 JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL Vol.41 No.14
<P>The key problem for constructing a stabilizer quantum code is how to create a set of generators for the stabilizer of the stabilizer quantum code, i.e. check matrix. In this paper, we suggest an approach based on the Clifford algebra to create the check matrix for the stabilizer quantum codes. In the proposed approach, the recursive relation of the matrix transform over the Clifford algebra is employed to generate the check matrix. With the proposed approach, a quantum code with any length can be constructed easily. Especially some new codes, which are impossible via previous approaches, are constructed.</P>
박귀화 ( Piao Guihua ) 연세대학교 언어정보연구원(구 연세대학교 언어정보개발원) 2018 언어사실과 관점 Vol.45 No.-
Yanbian, a typical bilingual region of Korean and Chinese in China, contains many bilinguals during the long-standing language contact among whom there are bilinguals mainly from the Korean National Minority and a few from the Han Nationality. Based on interviews with Chinese-Korean bilinguals of Han Nationality, through studying the characteristics of their code-switching, the paper reveals the natural integration of Chinese vocabulary and grammar into Korean language system and analyzes the corresponding intrinsic causes from the aspect of social linguistics and language internal system.