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Exponential stability of a pendulum in dynamic boundary feedback with a viscous damped wave equation

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Journal of Control and Decision 2022年第2期9卷 186-192页

作者： lu lu bao-Qing lu School of Basic Courses Beijing PolytechnicBeijngPeoples Republic of China School of Stistics Renmin University of ChinaBeijngPeople's Republic of China

In this paper,we continue the earlier work[lu,L,&Wang,D.L.(2017).Dynamic boundary feed-back of a pendulum coupled with a viscous damped wave *** Proceedings of the 36th Chinese Control Conference(CCQ)(pp.1676-1680)]on study the stability of a pendulum coupled with a viscous damped wave equation *** time we get the exponential stability result which is much better than the previous strong *** a detailed spectral analysis and opera-tor separation,we establish the Riesz basis property as well as the spectrum determined growth condition for the ***,the exponential stability of the system is achieved.

关键词： Pendulum dynamic boundary feedback control viscous damping spectral analysis exponential stability

Magneto-Optic Fiber Gratings Useful for Dynamic Dispersion Management and Tunable Comb Filtering

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Chinese Physics Letters 2010年第6期27卷 225-228页

作者： WU bao-Jian lu Xin QIU Kun Key Lab of Broadband Optical Fiber Transmission and Communication Networks of the Ministry of Education University of Electronic Science and Technology of China Chengdu 611 731

Intelligent control of dispersion management and tunable comb filtering in optical network appfications can be performed by using magneto-optic fiber Bragg gratings （MFBGs）. When a nonuniform magnetic field is applied to the MFBG with a constant grating period, the resulting grating response is equivalent to that of a conventional chirped grating. Under a linearly nonuniform magnetic field along the grating, a linear dispersion is achieved in the grating bandgap and the maximal dispersion slope can come to 1260ps/nm2 for a l0-mm-long fiber grating at 1550nm window. Similarly, a Gaussian-apodizing sarnpled MFBG is also useful for magnetically tunable comb filtering, with potential application to clock recovery from return-to-zero optical signals and optical carrier tracking.

关键词： MAGNETOOPTICS BRAGG gratings DISPERSION COMB filters OPTICAL communications MAGNETIC fields GAUSSIAN processes SIGNAL processing

Calculation of passive earth pressure of cohesive soil based on Culmann's method

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Water Science and Engineering 2011年第1期4卷 101-109页

作者： Hai-feng lu bao-yuan YUAN College of Earth Science and Engineering Hohai University Nanjing 210098 P. R. China

Based on the sliding plane hypothesis of Coulumb earth pressure theory, a new method for calculation of the passive earth pressure of cohesive soil was constructed with Culmann＇s graphical construction. The influences of the cohesive force, adhesive force, and the fill surface form were considered in this method. In order to obtain the passive earth pressure and sliding plane angle, a program based on the sliding surface assumption was developed with the *** programming language. The calculated results from this method were basically the same as those from the Rankine theory and Coulumb theory formulas. This method is conceptually clear, and the corresponding formulas given in this paper are simple and convenient for application when the fill surface form is complex.

关键词： Coluomb earth pressure theory Culmann's graphical construction, retaining wall passive earth pressure cohesive soil

Identification and profile of phenolamides with anthracnose resistance potential in tea(Camellia sinensis)

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Horticulture Research 2023年第9期10卷 98-110页

作者： Wenzhao Wang Xingcui Xie Yuanyuan Lv Haonan Guan lu Liu Qian Huang Yumeng bao Jie Zhou lu bao Chunmei Gong Youben Yu College of Horticulture Northwest A&F UniversityYangling 712100 ShaanxiChina College of Tropical Crops Hainan UniversityHaikou 570228 HainanChina

Tea anthracnose is a prevalent disease in China that can lead to reduced tea production and lower quality,yet there is currently a lack of effective means for controlling this *** this study,we identified 46 phenolamides(including 27 isomers)in different tissues and organs of tea plants based on a developed workflow,and the secondary mass spectra of all these compounds have been *** was revealed that tea plants predominantly accumulate protonated aliphatic phenolamides,rather than aromatic *** profile of phenolamides indicate that their buildup in tea plants is specific to certain tissues and acyl-acceptors,and this distribution is associated with the extent of phenolamide ***,it was observed that N-Feruloylputrescine(Fer-Put,a type of phenolamides)was responsive to the stimulated accumulation of the tea anthracnose *** findings of anti-anthracnose experiments in vitro and on tea leaf demonstrated that Fer-Put was capable of significantly inhibiting the growth of anthracnose pathogen colony,effectively prevented tea leaf ***,it was observed that Fer-Put treatment can enhance the antioxidant enzyme activity of tea ***002780.1 and TEA013165.1 gene may be responsible for the biosynthesis of Fer-Put in the disease resistance process in tea *** these studies,the types and distribution of phenolamides in tea plants have been elucidated,and Fer-Put’s ability to resist anthracnose has been established,providing new insights into the resistance of tea anthracnose.

关键词： isomers finding insight

Performance of Hybrids between Weedy Rice and Insect-resistant Transgenic Rice under Field Experiments: Implication for Environmental Biosafety Assessment

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Journal of Integrative Plant Biology 2009年第12期51卷 1138-1148页

作者： Qian-Jin Cao Hui Xia Xiao Yang bao-Rong lu Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering Institute of Biodiversity Science Fudan University Shanghai 200433 China

Transgene escape from genetically modified （GM） rice into weedy rice via gene flow may cause undesired environmental consequences. Estimating the field performance of crop-weed hybrids will facilitate our understanding of potential introgression of crop genes （including transgenes） into weedy rice populations, allowing for effective biosafety assessment. Comparative studies of three weedy rice strains and their hybrids with two GM rice lines containing different insect- resistance transgenes （CpTI or Bt/CpTI） indicated an enhanced relative performance of the crop-weed hybrids, with taller plants, more tillers, panicles, and spikelets per plant, as well as higher 1000-seed weight, compared with the weedy rice parents, although the hybrids produced less filled seeds per plant than their weedy parents. Seeds from the F1 hybrids had higher germination rates and produced more seedlings than the weedy parents, which correlated positively with 1000-seed weight. The crop-weed hybrids demonstrated a generally enhanced relative performance than their weedy rice parents in our field experiments. These findings indicate that transgenes from GM rice can persist to and introgress into weedy rice populations through recurrent crop-to-weed gene flow with the aid of slightly increased relative fitness in F1 hybrids.

关键词： biosafety ecological consequences fitness GM rice insect-resistance transgene Oryza sativa f. spontanea.

Multi-Modal Domain Adaptation Variational Autoencoder for EEG-Based Emotion Recognition

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IEEE/CAA Journal of Automatica Sinica 2022年第9期9卷 1612-1626页

作者： Yixin Wang Shuang Qiu Dan Li Changde Du bao-Liang lu Huiguang He the Research Center for Brain-inspired Intelligence National Laboratory of Pattern RecognitionInstitute of AutomationChinese Academy of ScienceBeijing 100190 the University of Chinese Academy of Sciences Beijing 100049 the Beijing Institute of Control and Electronic Technology Beijing 100038China the School of Mathematics and Information Sciences Yantai UniversityYantai 264003China the Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of ScienceBeijingChina the Department of Computer Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Traditional electroencephalograph(EEG)-based emotion recognition requires a large number of calibration samples to build a model for a specific subject,which restricts the application of the affective brain computer interface(BCI)in *** attempt to use the multi-modal data from the past session to realize emotion recognition in the case of a small amount of calibration *** solve this problem,we propose a multimodal domain adaptive variational autoencoder(MMDA-VAE)method,which learns shared cross-domain latent representations of the multi-modal *** method builds a multi-modal variational autoencoder(MVAE)to project the data of multiple modalities into a common *** adversarial learning and cycle-consistency regularization,our method can reduce the distribution difference of each domain on the shared latent representation layer and realize the transfer of *** experiments are conducted on two public datasets,SEED and SEED-IV,and the results show the superiority of our proposed *** work can effectively improve the performance of emotion recognition with a small amount of labelled multi-modal data.

关键词： Cycle-consistency domain adaptation electroencephalograph(EEG) multi modality variational autoencoder

LOW-POTENTIAL ELECTROSYNTHESIS OF CONDUCTING AND ELECTROACTIVE OLIGOCATECHOLBORANE WITH BluE LIGHT-EMITTING PROPERTIES

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Chinese Journal of Polymer Science 2013年第1期31卷 159-170页

作者： bao-yang lu Shuai Chen Lei-qiang Qin Yao Huang 徐景坤 School of Pharmacy Jiangxi Science & Technology Normal University School of Materials Science & Engineering Shandong University

Novel conducting oligocatecholborane （OCOB） with electrical conductivity of 3.73 × 10^-2 S cm-1 was successfully synthesized by low-potential electropolymerization of catecholborane （COB） in boron trifluoride diethyl etherate at 0.70 V versus Ag/AgC1. FT-IR and ^1H-NMR spectra, together with the computational results, proved that COB was polymerized through the coupling at C（4） and C（5} positions and the reactive B- H bond was stable during the electrochemical polymerization. The resulting product was mainly composed of oligomers with short chain lengths by GPC and mass spectral results. The as-formed OCOB film showed good electrochemistry in monomer-free electrolytes with the electrochromic property from opaque blue to sap green. Fluorescence studies indicated that soluble OCOB can emit bright blue light under excitation of 365 nm UV light with the maximum emission at 396 nm and a fluorescence quantum yield of 0.21. The deposited OCOB also exhibited favorable thermal stability and smooth and compact morphology even at high magnifications.

关键词： Conducting polymers Electrochemical polymerization Catecholborane Boron trifluoride diethyl etherate Fluorescence

Improved LQG Benchmark Based Control Performance Monitoring for Multivariable Systems

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Improved LQG Benchmark Based Control Performance Monitoring ...

The Interference Effect of a Bose-Einstein Condensate in a Ring-Shaped Trap

第25届中国控制与决策会议

作者： Zhang Deng-feng bao Bing-rui lu bao-chun Wang Zhi-quan Institute of Lianyungang Nanjing University of Science and Technology School of Mechanical Engineering Nanjing University of Science and Technology

ISBN: (纸本)9781467355339

By subspace identification technique, this article investigates the problem of control variance performance monitoring for multivariable systems. Based on LQG benchmark, an improved strategy is developed to overcome the deficiency of the conventional LQG benchmark based methods in practical applications. The multivariable system is first decomposed into multiple multi-input single-output （MISO） subsystems. Then the LQG benchmark is respectively obtained for each subsystem and the corresponding variance performance assessment indicator is yielded. The performance monitoring result of the overall system can finally be derived by weighting to each subsystem’s assessing indicator. Simulation example illustrated the validity of the proposed method.

关键词： Control Performance Monitoring and Assessment Multivariable Systems Subspace Identification LQG Benchmark

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Chinese Physics Letters 2012年第5期29卷 30-32页

作者： CAO Li-Juan LIU Shu-Juan lu bao-Long Key Laboratory of Atomic Frequency Standards Wuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071 Graduate School of the Chinese Academy of Sciences Beijing 100049

We have studied the interference effect of a Bose-Einstein condensate expanding in a ring-shaped trap. The dynamic process of the condensate is analyzed based on the Gross- Pitaevskii *** numerical results show that a petal-like interference pattern is formed during expansion within the ring-shaped *** petal number depends on the evolution time,which can be well explained by the interference of two flows of the condensate.

关键词： equation. Einstein shaped