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Dynamic State Estimation of Medium-voltage DC Integrated Power System with Pulse Load

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Journal of Modern Power Systems and Clean Energy 2020年第4期8卷 689-698页

作者： Runlong xiao Gang Wang xiaoliang Hao Renji Huang Youxing xiong National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of EngineeringWuhan 430033China

The dynamic characteristic evaluation is an important prerequisite for safe and reliable operation of the mediumvoltage DC integrated power system(MIPS),and the dynamic state estimation is an essential technical approach to the *** the electromechanical transient process in a traditional power system,periodic change in pulse load of the MIPS is an electromagnetic transient *** the system state suddenly changes in the range of a smaller time constant,it is difficult to estimate the dynamic state due to periodic *** paper presents a dynamic mathematical model of the MIPS according to the network structure and control strategy,thereby overcoming the restrictions of algebraic variables on the estimation and developing a dynamic state estimation method based on the extended Kalman *** the method of adding fictitious process noise,it is possible to solve the problem that the linearized algorithm of the MIPS model is less reliable when an abrupt change occurs in the pulse ***,the accuracy of the dynamic state estimation and the stability of the filter can be improved under the periodic disturbance of pulse *** simulation and experimental results confirm that the proposed model and method are feasible and effective.

关键词： Medium-voltage DC integrated power system pulse load dynamic state estimation extended Kalman filter fictitious process noise

NONLINEAR DYNAMICS MODFLING OF MECHANICAL PERIODICITY OF END DIASTOLIC VOluME OF LEFT VENTRICLE

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Applied Mathematics and Mechanics(English Edition) 2001年第10期22卷 1183-1191页

作者： XU Shi-xiong(许世雄) MAO xiao-chun(毛晓春) Mechanics and Engineering Science Department Fudan UniversityShanghai 200433 P R China Mechanics and Engineering Science Department Fudan UniversityShanghai 200433 P R China

The cardiovascular system with a lumped parameter model is treated, in which the Starling model is used to simulate left ventricle and the four-element Burattini & Gnudi model is used in the description of arterial system. Moreover, the feedback action of arterial pressure on cardiac cycle is taken into account. The phenomenon of mechanical periodicity (MP) of end diastolic volume (EDV) of left ventricle is successfully simulated by solving a series of one-dimensional discrete nonlinear dynamical equations. The effects of cardiovascular parameters on MP is also discussed.

关键词： left ventricle end diastolic volume mechanical periodicity nonlinear dynamics

Injectable hydrogels for anti-tumour treatment:a review

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Biosurface and Biotribology 2020年第3期6卷 59-74页

作者： Huan He Chaoming Xie xiong lu Key Lab of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong University610031 ChengduSichuanPeople’s Republic of China

Injectable hydrogels have become the material of choice for the treatment of solid tumours based on their advantages in loading anti-tumour *** study reviews the main scientific research achievements on antitumour injectable hydrogels in recent *** gel-forming mechanism of anti-tumour injectable hydrogels was listed,and the advantages and difficulties of each gel-forming mechanism were *** addition,several current anti-tumour methods based on injectable hydrogels were discussed,including chemotherapy,hyperthermiabased therapy,catalytic therapy and immune therapy,as well as the integration of diagnosis and treatment to monitor the progress of cancer *** anti-tumour mechanism and the advantages and disadvantages of various tumour treatments were ***,the future development trend of injectable hydrogels for anti-tumour therapy was discussed.

关键词： treatment. treatment mechanism

Natural polymer-based adhesive hydrogel for biomedical applications

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Biosurface and Biotribology 2022年第2期8卷 69-94页

作者： Siyu Long Chaoming Xie xiong lu Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengduChina Yibin Research Institute Southwest Jiaotong UniversityYibinChina

Hydrogel is a polymer network system that can form a hydrophilic three-dimensional network structure through different cross-linking *** recent years,hydrogels have received considerable attention due to their good biocompatibility and biodegradability by introducing different cross-linking mechanisms and functional *** with synthetic hydrogels,natural polymer-based hydrogels have low biotoxicity,high cell affinity,and great potential for biomedical fields;however,their mechanical properties and tissue adhesion capabilities have been unable to meet clinical *** recent years,many efforts have been made to solve these *** this review,the recent progress in the field of natural polymer-based adhesive hydrogels is *** authors first introduce the general design principles for the natural polymer-based adhesive hydrogels being used as excellent tissue adhesives and the challenges associated with their ***,their usages in biomedical applications are summarised,such as wound healing,haemostasis,nerve repair,bone tissue repair,cartilage tissue repair,electronic devices,and other tissue ***,the potential challenges of natural polymer-based adhesive hydrogels are presented.

关键词： biomedical applications design principles mechanical properties natural polymer-based adhesive hydrogels tissue adhesion

The Vlasov-Poisson-Boltzmann system for non-cutof hard potentials

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Science China Mathematics 2014年第3期57卷 515-540页

作者： xiao QingHua xiong LinJie ZHAO HuiJiang School of Mathematics and Statistics Wuhan University

This paper is concerned with the construction of globally smooth solutions near a given global Maxwellian to the Cauchy problem of tile Vlasov-Poisson-Boltzmann system for non-cutoff hard potentials in three space dimensions without the neutral condition imposed on the initial perturbation. Our analysis is based on the time-weighted energy method and some delicate estimates.

关键词： Vlasov-Poisson-Boltznlann system non-cutoff hard potentials time-weighted energy method

Quasi-Local Masses of Rotating Space-Times

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Communications in Theoretical Physics 2017年第9期67卷 342-346页

作者： xiao-xiong Zeng Ling Li School of Material Science and Engineering Chongqing Jiaotong University Chongqing 400074 China School of Mathematics Sichuan University of Arts and Science Dazhou 635000 China

We derive the Misner-Sharp-like masses Dilaton-Axion black hole by using the modified first of the Reissner-Nordstr6m black hole and the Einstein-Maxwell- law of thermodynamics. Their surface tensions are investigated. For the Reissner-NordstrSm black hole, the outer horizon radius is treated as a variable and the effective temperature is introduced. For the Einstein-Maxwe11-Dilaton-Axion black hole, the outer horizon radius, the angular momentum unit mass and the parameter b are seen as three independent variables, and the mass, the horizon area and the angular momentum are functions of them.

关键词： Misner-Sharp mass rotating space-times the modified first law of thermodynamics

Genome-wide identification and co-expression network analysis of the Os NF-Y gene family in rice

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The Crop Journal 2017年第1期5卷 21-31页

作者： Wenjie Yang Zhanhua lu Yufei xiong Jialing Yao College of Life Science and Technology Huazhong Agricultural UniversityWuhan 430070China College of Plant Science and Technology Huazhong Agricultural UniversityWuhan 430070China

Nuclear factor Y(NF-Y) is a ubiquitous transcription factor that regulates important physiological and developmental processes. In this study, we identified 34 Os NF-Y genes in rice, including 6 newly identified genes. Expression profile analysis covering the whole life cycle revealed that transcripts of Os NF-Y differentially accumulated in a tissue-specific,preferential or constitutive manner. In addition, gene duplication studies and expression analyses were performed to determine the evolutionary origins of the Os NF-Y gene *** Os NF-Y genes were differentially expressed after treatment of seedlings with one or more abiotic stresses such as drought, salt and cold. Analysis of expression correlation and Gene Ontology annotation suggested that Os NF-Y genes were co-expressed with genes that participated in stress, accumulation of seed storage reserves, and plant ***-expression analysis also revealed that Os NF-Y genes might interact with each other,suggesting that NF-Y subunits formed complexes that take part in transcriptional regulation. These results provide useful information for further elucidating the function of the NF-Y family and their regulatory pathways.

关键词： Abiotic stress Gene duplication Nuclear factor Y NF-Y Oryza sativa

Transcriptome analysis of hsp18.3 functions and regulatory systems using RNA-sequencing in the red flour beetle,Tribolium castaneum

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Journal of Integrative Agriculture 2018年第5期17卷 1040-1056页

作者： xiong Wen-feng XIE Jia WEI lu-ting ZHANG Si-si SONG xiao-wen GAO Shan-shan LI Bin Jiangsu Key Laboratory for Biodiversity and Biotechnology College of Life SciencesNanjing Normal University

The red flour beetle, Tribolium castaneum, is a major agriculture pest of stored grain, cereal products and peanuts for human consumption. It is reported that heat shock protein 18.3 of T. castaneum（Tchsp18.3） plays a significant role in stress resistance, development and reproduction. However, the regulatory systems of Tchsp18.3 remain unknown. Therefore, we compared the global transcriptome profiles of RNA interference（RNAi）-treated larvae（ds-Tchsp18.3） and control larvae of T. castaneum using RNA sequencing. Overall, we obtained 14 154 435 sequence reads aligned with 13 299 genes. Additionally, 569 differentially expressed genes（DEGs） were identified from the ds-Tchsp18.3 and control groups, of which 246 DEGs were annotated in the 47 Gene Ontology（GO） functional groups and 282 DEGs were assigned to 147 Kyoto Encyclopedia of Genes and Genomes（KEGG） biological signaling pathways. The DEGs encoding viperin, dorsal, Hdd11, PGRP2, defensin1 and defensin2 were simultaneously related to immunity and stress responses, which suggests that cross-talk might exist between the immunity and stress responses of T. castaneum. The knockdown of Tchsp18.3 gene expression suppressed the antioxidant activity process, which most likely modulated the effects of Tchsp18.3 on development and reproduction. Furthermore, the DEGs, including Blimp-1, Gld, Drm, Kinesin-14, Pthr2, Delta（11）-like and EGF-like domain protein 2, were also associated with the development and reproduction of ds-Tchsp18.3 insects. Additionally, knockdown of Tchsp18.3 amplified the serine protease（SP） signaling pathway to further regulate stress responses and innate immunity as well as development and reproduction of the red flour beetles. These results provide valuable insight into the molecular regulatory mechanism of Tchsp18.3 involved in insect physiology and further facilitate the research of suitable and sustainable management for pest control.

关键词： Hsp18.3 stress response immunity development reproduction Tribolium castaneum

Chaotic microlasers caused by internal mode interaction for random number generation

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Light(Science & Applications) 2022年第7期11卷 1565-1574页

作者： Chun-Guang Ma Jin-Long xiao Zhi-xiong xiao Yue-De Yang Yong-Zhen Huang State Key Laboratory of Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Material Science and Optoelectronic Engineering University of Chinese Academy of SciencesBeijing 100049China

Chaotic semiconductor lasers have been widely investigated for generating unpredictable random numbers,especially for lasers with external optical ***,chaotic lasers under external feedback are hindered by external feedback loop time,which causes correlation peaks for chaotic ***,we demonstrate the first self-chaotic microlaser based on internal mode interaction for a dual-mode microcavity laser,and realize random number generation using the self-chaotic laser *** adjusting mode frequency interval close to the intrinsic relaxation oscillation frequency,nonlinear dynamics including self-chaos and period-oscillations are predicted and realized numerically and experimentally due to internal mode *** internal mode interaction and corresponding carrier spatial oscillations pave the way of mode engineering for nonlinear dynamics in a solitary *** findings provide a novel and easy method to create controllable and robust optical chaos for high-speed random number generation.

关键词： mode random chaotic