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Darboux Transformations and Soliton Solutions for Classical Boussinesq-Burgers Equation

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Communications in Theoretical Physics 2008年第9期50卷 579-582页

作者： xu rui School of Mathematical Sciences Fudan University Shanghai 200433 China

Two basic Darboux transformations of a spectral problem associated with a classical Boussinesq-Burgersequation are presented in this *** are used to generate new solutions of the classical Boussinesq-Burgersequation.

关键词： classical Boussinesq-Burgers equation Darboux transformation soliton solution

A Review of High-Throughput Field Phenotyping Systems: Focusing on Ground Robots

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Plant Phenomics 2022年第1期4卷 215-234页

作者： rui xu Changying Li Bio-Sensing and Instrumentation Laboratory College of EngineeringThe University of GeorgiaAthensUSA Phenomics and Plant Robotics Center The University of GeorgiaAthensUSA

Manual assessments of plant phenotypes in the field can be labor-intensive and *** high-throughput field phenotyping systems and in particular robotic systems play an important role to automate data collection and to measure novel and fine-scale phenotypic traits that were previously unattainable by *** main goal of this paper is to review the state-of-the-art of high-throughput field phenotyping systems with a focus on autonomous ground robotic *** paper first provides a brief review of nonautonomous ground phenotyping systems including tractors,manually pushed or motorized carts,gantries,and cable-driven ***,a detailed review of autonomous ground phenotyping robots is provided with regard to the robot’s main components,including mobile platforms,sensors,manipulators,computing units,and *** also reviews the navigation algorithms and simulation tools developed for phenotyping robots and the applications of phenotyping robots in measuring plant phenotypic traits and collecting phenotyping *** the end of the review,this paper discusses current major challenges and future research directions.

关键词： robot autonomous Focus

GLOBAL DYNAMICS OF A DELAYED HIV-1 INFECTION MODEL WITH ABSORPTION AND SATURATION INFECTION

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International Journal of Biomathematics 2012年第3期5卷 191-203页

作者： rui xu Institute of Applied MathematicsShijiazhuang Mechanical Engineering College Shijiazhuang 050003 Hebei P. R. China

In this paper, an HIV-1 infection model with absorption, saturation infection and an intracellular delay accounting for the time between viral entry into a target cell and the production of new virus particles is investigated. By analyzing the characteristic equations, the local stability of an infection-free equilibrium and a chronic-infection equilibrium of the model is established. By using suitable Lyapunov functionals and LaSalle＇s invariance principle, it is proved that if the basic reproduction ratio is less than unity, the infection-free equilibrium is globally asymptotically stable; and if the basic reproduction ratio is greater than unity, sufficient condition is derived for the global stability of the chronic-infection equilibrium.

关键词： HIV-1 infection absorption intracellular delay global stability LaSalle's invariance principle.

Autonomous decentralized intelligent vibration control for large split-blanket solar arrays

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Science China Technological Sciences 2013年第3期56卷 703-712页

作者： LI Dongxu xu rui College of Aerospace Science and Engineering National University of Defense Technology

Large split-blanket solar arrays are semi-rigid *** is difficult for this kind of structure to achieve vibration *** order to solve this problem effectively,firstly,we use the finite element method to construct a dynamic model of a solar array with piezoelectric smart structure,and then we propose a new control method,namely the autonomous decentralized intelligent control to address the vibration control *** on the concept of autonomous decentralized control presented in this paper,the control system can be divided into multiple autonomous *** subsystem performs several control functions without external *** simulations are carried out to verify the proposed control *** results indicate that this method is *** with the traditional positive position feedback control method,the attenuation time of the structural bending vibration can be reduced by half with the proposed ***,the control system can perform well even under severe subsystem failure without external intervention.

关键词： solar array piezoelectric smart structure vibration control decentralized control

Geometry-based distributed arc-consistency method formultiagent planning and scheduling

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Science China(Technological Sciences) 2019年第1期62卷 133-143页

作者： xu rui LI ZhaoYu CUI PingYuan Institute of Deep Space Exploration Technology School of Aerospace Engineering Beijing Institute of Technology Key Laboratory of Autonomous Navigation and Control for Deep Space Exploration Ministry of Industry and Information Technology

This research focuses on building a distributed algorithm for planning and scheduling multiple agents to help people deal with events beyond their cognitive capacity, such as car assembly, factory management, spacecraft constellation, etc. We address not only the efficiency of the algorithm but also communication and the individual privacy. As to reason over the problems with multiple agents which are distributed but interconnected, a formal account of the Action-centric Multiagent Simple Temporal Problem(AMSTP) is put forward using the representation of geometries. The key technique we build on is a novel distributed arc-consistency algorithm centered by the geometric method called GDAC, which pays attention to how an agent's local subproblem affects other agents' subproblems. The GDAC is based on geometries taking the action rather than the timepoint as a variable, which can deal with continuous intervals and decrease the number of variables. Comprehensive experiments are run and the proposed technique outperforms the competitor and shows considerable merit compared to the centralized algorithm.

关键词： arc consistency multiple agents planning and scheduling

An Efficient WRF Framework for Discovering Risk Genes and Abnormal Brain Regions in Parkinson's Disease Based on Imaging Genetics Data

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Journal of Computer Science & Technology 2021年第2期36卷 361-374页

作者： Xia-An Bi Zhao-xu Xing rui-Hui xu Xi Hu College of Information Science and Engineering Hunan Normal UniversityChangsha 410006China Hunan Provincial Key Laboratory of Intelligent Computing and Language Information Processing Hunan Normal UniversityChangsha 410006China

As an emerging research field of brain science,multimodal data fusion analysis has attracted broader attention in the study of complex brain diseases such as Parkinson's disease(PD).However,current studies primarily lie with detecting the association among different modal data and reducing data *** data mining method after fusion and the overall analysis framework are *** this study,we propose a weighted random forest(WRF)model as the feature screening *** interactions between genes and brain regions are detected as input multimodal fusion features by the correlation analysis *** implement sample classification and optimal feature selection based on WRF,and construct a multimodal analysis framework for exploring the pathogenic factors of *** experimental results in Parkinson's Progression Markers Initiative(PPMI)database show that WRF performs better compared with some advanced methods,and the brain regions and genes related to PD are *** fusion of multi-modal data can improve the classification of PD patients and detect the pathogenic factors more comprehensively,which provides a novel perspective for the diagnosis and research of *** also show the great potential of WRF to perform the multimodal data fusion analysis of other brain diseases.

关键词： multimodal fusion feature Parkinson's disease pathogenic factor detection sample classification weighted random forest model

Cross-domain data cloud storage auditing scheme based on certificateless cryptography

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The Journal of China Universities of Posts and Telecommunications 2021年第6期28卷 36-47页

作者： xu Yan Li Zheng Ding Long xu rui School of Computer Science and Technology Anhui UniversityHefei 230039China Anhui Engineering Laboratory of IoT Security Technologies Anhui UniversityHefei 230039China School of Computer University of Geosciences(Wuhan)Wuhan 430078China

With the development of Internet of things(IoT), more and more intelligent terminal devices outsource data to cloud servers(CSs). However, the CS is not fully trusted, and the heterogeneity among different domains makes it difficult for third-party auditor(TPA) to conduct an efficient integrity auditing of outsourced data. Therefore, the cross-domain data cloud storage auditing scheme based on certificateless cryptography is proposed, which can effectively avoid the big burden of certificate management or key escrow problems in identity-based cryptography. At the same time, TPA can effectively audit the integrity of outsourced data in different domains. Formal security proof and analysis show that the cloud storage auditing scheme satisfies the security and privacy requirements. Performance analysis demonstrates that the efficiency is acceptable.

关键词： cloud storage auditing certificateless cryptography cross-domain Internet of things(IoT)

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Smyd1 is essential for myosin expression and sarcomere organization in craniofacial,extraocular,and cardiac muscles

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Journal of Genetics and Genomics 2021年第3期48卷 208-218页

作者： Shuang Jiao rui xu Shaojun Du Department of Biochemistry and Molecular Biology Institute of Marine and Environmental TechnologyUniversity of Maryland School of MedicineBaltimoreMD 21202USA Key Laboratory of Experimental Marine Biology Center for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdao 266071China School of Life Sciences Shandong University of TechnologyZibo 255049China

Skeletal and cardiac muscles are striated myofibers that contain highly organized sarcomeres for muscle *** studies revealed that Smyd1,a lysine methyltransferase,plays a key role in sarcomere assembly in heart and trunk skeletal ***,Smyd1 expression and function in craniofacial muscles are not ***,we analyze the developmental expression and function of two smyd1 paralogous genes,smyd1 a and smyd1 b,in craniofacial and cardiac muscles of zebrafish *** data show that loss of smyd1a(smyd1a^(mb5))or smyd1b(smyd1b^(sa15678))has no visible effects on myogenic commitment and expression of myod and myosin heavy-chain m RNA transcripts in craniofacial ***,myosin heavy-chain protein accumulation and sarcomere organization are dramatically reduced in smyd1b^(sa15678) single mutant,and almost completely diminish in smyd1a^(mb5);smyd1b^(sa15678) double mutant,but not in smyd1a^(mb5) *** defects are also observed in cardiac muscles of smyd1b^(sa15678) *** craniofacial and cardiac muscle formation is associated with an upregulation of hsp90α1 and unc45b mRNA expression in smyd1b^(sa15678) and smyd1a^(mb5);smyd1b^(sa15678) ***,our studies indicate that Smyd1b,but not Smyd1a,plays a key role in myosin heavy-chain protein expression and sarcomere organization in craniofacial and cardiac *** of smyd1b results in muscle-specific stress response.

关键词： Smyd1 Myosin Sarcomere Craniofacial muscle Cardiac muscle

Global stability of an SEIR epidemic model with vaccination

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International Journal of Biomathematics 2016年第6期9卷 35-57页

作者： Lili Wang rui xu Institute of Applied MathematicsShijiazhuang Mechanical Engineering College 97 Heping West Road Shijiazhuang 050003 Hebei Province P. R. China

In this paper, an SEIR epidemic model with vaccination is formulated. The results of our mathematical analysis indicate that the basic reproduction number plays an important role in studying the dynamics of the system. If the basic reproduction number is less than unity, it is shown that the disease-free equilibrium is globally asymptotically stable by comparison arguments. If it is greater than unity, the system is permanent and there is a unique endemic equilibrium. In this case, sufficient conditions are established to guarantee the global stability of the endemic equilibrium by the theory of the compound matrices. Numerical simulations are presented to illustrate the main results.

关键词： Global stability SEIR epidemic model vaccination compound matrices.