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A Dual-mode Nonlinear Model Predictive Control with the Enlarged Terminal Constraint Sets

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自动化学报 2006年第1期32卷 21-27页

作者： zou Tao LI Shao-Yuao DING Bao-Cang Institute of Automation Shanghai Jiaotong University Shanghai 200240 School of Electricity and Automation Hebei University of Technology Tianjin 300130

Aiming at a class of nonlinear systems with multiple equilibrium points, we present a dual-mode model predictive control algorithm with extended terminal constraint set combined with control invariant set and gain schedule. Local LQR control laws and the corresponding maximum control invariant sets can be designed for finite equilibrium points. It is guaranteed that control invariant sets are overlapped each other. The union of the control invariant sets is treated as the terminal constraint set of predictive control. The feasibility and stability of the novel dual-mode model predictive control are investigated with both variable and fixed horizon. Because of the introduction of extended terminal constrained set, the feasibility of optimization can be guaranteed with short prediction horizon. In this way, the size of the optimization problem is reduced so it is computationally efficient. Finally, a simulation example illustrating the algorithm is presented.

关键词：不变量集非线性模型预先控制非线性约束系统增益表

Dual-beam delay-encoded all fiber Doppler optical coherence tomography for in vivo measurement of retinal blood flow

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Chinese Optics Letters 2022年第1期20卷 101-105页

作者： Mingming Wan Shanshan Liang Xinyu Li Zhengyu Duan Jiebin zou Jun Chen jin Yuan Jun Zhang School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006China National Innovation Center for Advanced Medical Devices Shenzhen 518131China GBA Branch of Aerospace Information Research Institute Chinese Academy of SciencesGuangzhou 510530China School of Biomedical Engineering Sun Yat-sen UniversityGuangzhou 510006China State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangzhou 510060China School of Artificial Intelligence Guilin University of Electronic TechnologyGuilin 541004China

In this paper,we propose and demonstrate a dual-beam delay-encoded Doppler spectral domain optical coherence tomography(OCT) system for in vivo measurement of absolute retinal blood velocity and flow with arbitrary *** incident beam is split by a beam displacer into two probe beams of the single-spectrometer spectral domain OCT system with orthogonal polarization states and an optical path length *** validate our approach with a phantom and in vivo experiments of human retinal blood flow,respectively.

关键词： optical coherence tomography ocular perfusion optic nerve head ophthalmology

Fine-mapping and transcriptome analysis of the photosensitive leaf-yellowing gene CaLY1 in pepper(Capsicum annuum L.)

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Horticultural Plant Journal 2023年第1期9卷 122-132页

作者： Sha Yang Zhuqing Zhang Wenchao Chen Chengliang Liang Xuefeng Li Zhoubin Liu Qingzhi Cui Yanqing Ma Xuexiao zou College of Horticulture Hunan Agricultural UniversityChangsha 410128China Vegetable Institution of Hunan Academy of Agricultural Science Changsha 410125China

Leaf color is directly related to altered ***,leaf yellowing mutants can be widely used for the researching plant physiology and functional genomes,for cultivating new varieties of popular horticultural plants,and for identifying hybrid purity(as markers).Here,we constructed a^(60)Co-γF_(2)population from the leaf-yellowing mutant R24 via radiation mutation with the inbred line WT21 of *** analysis showed that the leaf-yellowing of the mutant was controlled by a single recessive *** applying the Bulk Segregation Analysis and Kompetitive Allele Specific PCR markers,the leaf-yellowing gene CaLY1(Capsicum annuum Leaf yellow 1)was mapped on chromosome 9,SNP5791587-SNP6011215,with a size of 214.5 *** non-synonymous mutated gene Capana09g000166 was found in the *** gene encoded a Psb X,which is the core complex of PSⅡ.Transcriptome analysis further showed that 2301 differentially expressed genes were identified under shading treatment for 24 h in *** Gene Ontology enrichment pathways were related to photosynthesis light harvesting,cell wall,activity of quercetin 3-O-glucosyltransferase and flavonoid metabolic process,which likely regulate the response of pepper leaves to different light *** enrichment analysis indicated that the most abundant pathways were photosynthesis antenna proteins and metabolic.

关键词： Pepper Leaf-color yellow Fine-mapping Gene Photosensitive

Vibration harmonic suppression technology for electromagnetic vibrators based on an improved sensorless feedback control method

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Frontiers of Information Technology & Electronic Engineering 2024年第3期25卷 472-483页

作者： Wei LI Junning CUI Xingyuan BIAN Limin zou Centerof Ultra-precision Optoelectronic Instrument Engineering Harbin Institute of TechnoogyHarbin 0080China Key Lab of Ultra-precision Intlligent Instrumentation(Harbin Institute of Technology).Ministry of Industry and Information Technology Harbin 150080China

To realize low harmonic distortion of the vibration waveform output from electromagnetic vibrators,we propose a vibration harmonic suppression technology based on an improved sensorless feedback control *** changing the original driving circuit,the alternating current(AC)equivalent resistance of the driving coil is used to obtain high-precision vibration velocity information,and then a simple and reliable velocity feedback control system is *** the study of the effect of different values of key parameters on the system,we have achieved an effective expansion of the velocity characteristic frequency band of low-frequency vibration,resulting in an enhanced harmonic suppression capability of velocity feedback *** present extensive experiments to prove the effectiveness of the proposed method and make comparisons with conventional control *** the frequency range of 0.01-1.00 Hz,without using any sensors,the method proposed in this study can reduce the harmonic distortion of the vibration waveform by about 40%compared to open-loop control and by about 20%compared to a conventional sensorless feedback control method.

关键词： Vibration calibration Electromagnetic vibrators Harmonic suppression Sensorless control method Velocity feedback control

Ultra-high current gain tunneling hot-electron transfer amplifier based on vertical van der Waals heterojunctions

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Nano Research 2020年第8期13卷 2085-2090页

作者： Xu Zhao Peng Chen Xingqiang Liu Guoli Li Xuming zou Yuan Liu Qilong Wu Yufang Liu Woo Jong Yu Lei Liao Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education&Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices School of Physics and ElectronicsChangsha410082China Henan Normal University School of PhysicsXinxiang453007China Department of Electronic and Electrical Engineering Sungkyunkwan UniversitySuwon440-746Republic of Korea

Due to the backscattered parasitic current from the barriers,the current gain of the widely used amplifier is far from *** this work,we demonstrate a vertical Au/Al2O3/BP/MoS2 tunneling hot-electron transfer amplifier with a hot-electron emitter-base junction and a p-n junction as the base-collector *** monoenergetic electrons traverse through the ultrathin Al2O3 dielectric via tunneling,which are accelerated and shifted to the collector *** devices exhibit a high current on-off ratio of>105 and a high current density(JC)of∼1,000 A/cm2 at the same ***,this work demonstrates a common-emitter current gain(β)value of 1,384 with a nanowatt power consumption at room temperature,which is a record high value among the all 2D based hot-electron ***,the temperature dependent performance is investigated,and theβvalue of 1,613 is obtained at 150 ***,this work presents the potential of 2D based transistors for high-performance applications.

关键词： bipolar junction transistor hot electron van der Waals heterostructure current gain

Advance in Antibacterial Magnesium Alloys and Surface Coatings on Magnesium Alloys:A Review

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Acta Metallurgica Sinica(English Letters) 2020年第5期33卷 615-629页

作者： Yang Shao Rong-Chang Zeng Shuo-Qi Li Lan-Yue Cui Yu-Hong zou Shao-Kang Guan Yu-Feng Zheng Corrosion Laboratory for Light Metals College of Materials Science and EngineeringShandong University of Science and TechnologyQingdao 266590China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China

Magnesium(Mg)alloys as a bioabsorbable light metal have shown great clinical potential as bone replacement *** this review,the categories,progress in cutting-edge preparation technologies and antibacterial mechanisms of Mg alloys and considerable numbers of corrosion-resistant and functional coatings are *** relationship among the microstructure(grain size,intermetallic compounds),biocorrosion resistance and biocompatibility for antibacterial Mg alloys is *** challenge and outlooks of biomedical Mg alloys and coatings are proposed from an antibacterial perspective.

关键词： Magnesium alloys Antibacterial properties Coatings Degradation Biomaterial

Frequency multiplication with toroidal mode number of kink/fishbone modes on a static HL-2A-like tokamak

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Plasma Science and Technology 2022年第12期24卷 56-66页

作者： Zhihui zou Ping ZHU Charlson C KIM Wei DENG Xianqu WANG Yawei HOU CAS Key Laboratory of Geospace Environment and Department of Plasma Physics and Fusion Engineering University of Science and Technology of ChinaHefei 230026People's Republic of China International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Department of Engineering Physics University of Wisconsin-MadisonMadisonWisconsin 53706United States of America SLS2 Consulting San DiegoCalifornia 92107United States of America Southwestern Institute of Physics Chengdu 610041People's Republic of China Institute of Fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031People's Republic of China School of Mathematics and Physics Anhui Jianzhu UniversityHefei 230601People's Republic of China

In the presence of energetic particles(EPs),the long-lived mode(LLM) frequency multiplication with n=1,2,3,or higher is often observed on HL-2A,where n is the toroidal mode *** kinetic-MHD model simulations of the energetic particle(EP) driven kink/fishbone modes on a static HL-2A-like tokamak using NIMROD code find that when the background plasma pressure is relatively high,and the EP pressure and the beam energy are relatively low,the mode frequency increases almost linearly with EP pressure,and the frequency is proportional to n(’frequency multiplication’),even in the absence of any equilibrium plasma *** addition,the frequency multiplication persists as the safety factor at the magnetic axis q_(0)*** the absence of EPs,the growth rate of the 1/1 mode is the largest;however,as the EP pressure increases,the growth rate of 2/2 modes or 3/3 modes becomes dominant,suggesting that higher-n modes are more vulnerable to *** results may shed light on the understanding of the toroidal mode number dependence of kink/fishbone modes in the advanced scenarios of tokamaks with weak or reversed central magnetic shear.

关键词： internal kink mode fishbone mode long-lived mode(LLM) energetic particles(EPs) HL-2A NIMROD

Runxl protects against the pathological progression of osteoarthritis

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Bone Research 2021年第4期9卷 618-629页

作者： Chenchen Zhou Yujia Cui Yueyi Yang Daimo Guo Demao Zhang Yi Fan Xiaobing Li jing zou jing Xie State Key Laboratory of Oral Diseases West China Hospital of StomatologySichuan UniversityChengduChina National Clinical Research Center for Oral Diseases Sichuan UniversityChengduChina Department of Pediatric Dentistry West China Hospital of StomatologySichuan UniversityChengduChina

Runt-related transcription factor-1(Runxl)is required for chondrocyte-to-osteoblast lineage commitment by enhancing both chondrogenesis and osteogenesis during vertebrate ***,the potential role of Runxl in joint diseases is not well *** the current study,we aimed to explore the role of Runxl in osteoarthritis induced by anterior cruciate ligament transaction(ACLT)*** showed that chondrocyte-specific Runxl knockout(Runx1f/fCol2a1-Cre)aggravated cartilage destruction by accelerating the loss of proteoglycan and collagen II in early ***,we observed thinning and ossification of the growth plate,a decrease in chondrocyte proliferative capacity and the loss of bone matrix around the growth plate in late *** overexpressed Runxl by adeno-associated virus(AAV)in articular cartilage and identified its protective effect by slowing the destruction of osteoarthritis in cartilage in early osteoarthritis and alleviating the pathological progression of growth plate cartilage in late ***-seq analysis identified new targets that interacted with Runxl in cartilage pathology,and we confirmed the direct interactions of these factors with Runxl by *** study helps us to understand the function of Runxl in osteoarthritis and provides new clues for targeted osteoarthritis therapy.

关键词： osteoarthritis protective diseases

Programmed DNA walkers for biosensors

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Chinese Chemical Letters 2024年第9期35卷 119-129页

作者： Chang Liu Tao Wu Lijiao Deng Xuzi Li Xin Fu Shuzhen Liao Wenjie Ma Guoqiang zou Hai Yang School of Chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan 411104China College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

Nowadays,due to excellent biological and polymeric characteristics,DNA has been widely noted as an emerging building block to construct diverse materials for biosensing,in vivo imaging,drug delivery,and disease ***,relying on programmability,predictability,and stability of DNA,DNA walkers have opened new and exciting opportunities in modern life sciences for target detection and biological analysis,which are constructed by self-assembly of DNA or combining DNA with other nanomaterials(e.g.,quantum dots,gold nanoparticles,magnetic nanoparticles,polymers).Compared with conventional nanomaterials(lanthanide-doped upconversion nanoparticles,magnetic nanomaterials,carbon dots,silicon dots,and so on),DNA walkers showed convenient modification,lower biotoxicity,excellent biocompatibility and high biostability,improving the biological ***,with high-speed operating efficiency and sustainable operation,DNA walkers powered by strand displacement reaction or protein enzyme/DNAzyme reaction,have highly sensitive detection and signal amplification abilities,which are applied in biosensing,material assembly and synthesis,and early cancer ***,DNA walkers could be regarded as signal amplifiers,which enhanced the signal transduction and amplified biosensor sensing ***,we systematically and comprehensively summarized the operating principles of various DNA walkers,categorized rational design of the DNA walker,and outlined the application of DNA walker in ***,the challenges and future trends of DNA walkers were discussed.

关键词： DNA walker Biosensors Signal amplification strategies Operating principles Design strategies