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The Analysis of Global Input-to-state Stability for Piecewise Affine Systems with Time-delay

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International Journal of Automation and computing 2012年第2期9卷 211-214页

作者： xiao-Wu mu Yang Gao Department of Mathematics Zhengzhou University Zhengzhou 450052 PRC Department of Mathematics Daqing Normal University Daqing 163712 PRC

In this paper, global input-to-state stability （ISS） for discrete-time piecewise affine systems with time-delay are considered Piecewise quadratic ISS-Lyapunov functions are adopted. Both Lyapunov-Razumikhiu and Lyapunov-Krasovskii methods are used The theorems of Lyapunov-Razumikhin type and Lyapunov-Krasovskii type for piecewise affine systems with time-delay are shown respectively.

关键词： Piecewise affine systems input-to-state stability time delays discrete systems Lyapunov function.

Selective extraction of dimethoate from cucumber samples by use of molecularly imprinted microspheres

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Journal of Pharmaceutical Analysis 2015年第3期5卷 200-206页

作者： Jiao-Jiao Du rui-Xia Gao Hu Yu xiao-Jing Li Hui mu Department of Chemistry School of ScienceXi'an Jiaotong University

Molecularly imprinted polymers for dimethoate recognition were synthesized by the precipitation polymerization technique using methyl methacrylate （MMA） as the functional monomer and ethylene glycol dimethacrylate （EGDMA） as the cross-linker. The morphology, adsorption and recognition properties were investigated by scanning electron microscopy （SEM）, static adsorption test, and competitive adsorption test. To obtain the best selectivity and binding performance, the synthesis and adsorption conditions of MIPs were optimized through single factor experiments. Under the optimized conditions, the resultant polymers exhibited uniform size, satisfactory binding capacity and significant selectivity. Furthermore, the imprinted polymers were successfully applied as a specific solid-phase extractants combined with high performance liquid chromatography （HPLC） for determination of dimethoate residues in the cucumber samples. The average recoveries of three spiked samples ranged from 78.5% to 87.9% with the relative standard deviations （RSDs） less than 4.4% and the limit of detection （LOD） obtained for dimethoate as low as 2.3 μg/mL.

关键词： Mol^alarly imprintedpolymer ,Precipitation polymeriza-tion Dimethoate Cucumber HPLC

Effective resource scheduling scheme considering scheduling relevancy for downlink joint transmission system

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The Journal of China Universities of Posts and Telecommunications 2012年第5期19卷 16-25页

作者： LI xiao-na CUI Qi-mei mu Yan-lin TAO xiao-feng Key Laboratory of Universal Wireless Communications Ministry of EducationBeijing University of Posts and TelecommunicationsBeijing 100876China

Coordinated multi-point （CoMP） transmission is a promising technique to improve both cell average and cell edge throughput for long term evolution-advanced （LTE-A）. For CoMP joint transmission （CoMP-JT） in heterogeneous scenario, if joint transmission （JT） users are firstly scheduled, other non-JT users will not be allocated sufficient resources, i.e., scheduling relevancy exists in the users under different cells in the same coordination cluster. However, the CoMP system throughput will decline remarkably, if the impact of scheduling relevancy is not considered. To address this issue, this paper proposes a novel scheduling scheme for CoMP in heterogeneous scenario. The principles of the proposed scheme include two aspects. Firstly, this scheme gives priority to user fairness, based on an extended proportional fairness （PF） scheduling algorithm. Secondly, the throughput of the coordination cluster should be maintained at a high level. By taking the non-CoMP system as a baseline, the proposed scheme is evaluated by comparing to random PF （RPF） and orthogonal PF （OPF） scheme. System-level simulation results indicate that, the proposed scheme can achieve considerable performance gain in both cell average and cell edge throughput.

关键词： CoMP JT resource scheduling relevancy cell edge throughput

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神经先验增强的抗干扰鲁棒自动驾驶导航

计算机应用研究 2025年第1期42卷 111-116页

作者：穆凡刘哲上海交通大学电子信息与电气工程学院上海200240

自动驾驶车辆广泛依赖感知系统来进行城市导航和环境理解,然而现有研究大多局限于良好的城市驾驶环境,在恶劣天气以及外部干扰下导致的传感器故障和感知失灵等严重影响现有自动驾驶系统的实际落地。为此提出了一种基于神经先验的自动驾... 详细信息

自动驾驶车辆广泛依赖感知系统来进行城市导航和环境理解,然而现有研究大多局限于良好的城市驾驶环境,在恶劣天气以及外部干扰下导致的传感器故障和感知失灵等严重影响现有自动驾驶系统的实际落地。为此提出了一种基于神经先验的自动驾驶信息重建算法,通过对大范围自动驾驶场景的隐式建模密集地存储场景几何先验,并基于注意力机制结合隐式神经先验进行自动驾驶感知信息的鲁棒重建,最终提出一个通用的自动驾驶导航鲁棒性增强框架。在CARLA自动驾驶模拟器仿真实验中,该算法显著提升了多个现有自动驾驶模型在外部干扰下的导航性能,使自动驾驶模型在攻击和干扰下的性能衰减率从82.74%下降到了8.84%,证明了所提方法的通用性和有效性。

关键词：自动驾驶鲁棒性神经辐射场

Theil Utility Based multi-Device Cooperation Mechanism for Service Quality Equilibrium in Ubiquitous Stub Environments

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China Communications 2014年第6期11卷 140-150页

作者： rui Lanlan mu Nan GUO Shaoyong QIU Xuesong ZHANG Jie State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications AsiaInfo-Linkage Inc.

An approach to make heterogeneous devices cooperate with each other to provide ubiquitous service remains a longstanding challenge in ubiquitous environments. In addition, when multi-user request ubiquitous services simultaneously, the arbitrariness in resource allocation process easily leads to non-equilibrium of qualities of multiuser's services. Thus, How to design an effective heterogeneous devices cooperation mechanism that meet the QoS requirements and also equilibrate QoS among multi-user's services becomes a very tough problem. In the paper, Equilibrium Index and Theil Utility function are imported to establish a multidevice equilibrium cooperation model, which is benefit for resource allocation in ubiquitous environments. Then a Theil-Equilibrium based Cooperation Mechanism for multi-service is proposed. Firstly, in order to simplify calculating, a dimensionless processing is introduced. After that, a cooperation approach with Theil-Utility Heuristic algorithm is designed to choose the best solution for the simplified model. At last, the mechanism is simulated in a smart home scenario. The simulation results show that this mechanism outperforms non-equilibrium method by improving almost 40% in internal equilibrium with just reducing 0-2% in the total utility ofall the requested ubiquitous services. These data show that the proposed mechanism performs well in equilibrating qualities of multi-user's ubiquitous services.

关键词： ubiquitousstub environments cooperation among multi-device QoS equilibrium equilibrium index theil utility

Differential response of injured and healthy retinas to syngeneic and allogeneic transplantation of a clonal cell line of immortalized olfactory ensheathing glia:a double-edged sword

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Neural Regeneration Research 2025年第8期20卷 2395-2407页

作者： María Norte-muñoz María Portela-Lomba Paloma Sobrado-Calvo Diana Simón Johnny Di Pierdomenico Alejandro Gallego-Ortega Mar Pérez JoséMCabrera-Maqueda Javier Sierra Manuel Vidal-Sanz María Teresa Moreno-Flores Marta Agudo-Barriuso Grupo de Investigación Oftalmología Experimental Departamento de OftalmologíaOptometríaOtorrinolaringología y Anatomía PatológicaFacultad de MedicinaUniversidad de MurciaInstituto Murciano de Investigación Biosanitaria(IMIB)Campus de Ciencias de la SaludMurciaSpain Experimental Sciences Faculty Universidad Francisco de VitoriaPozuelo de AlarcónMadridSpain Anatomy Histology and Neuroscience DepartmentMedicine FacultyUniversidad Autónoma de MadridMadridSpain Center of Neuroimmunology Service of NeurologyLaboratory of Advanced Imaging in Neuroimmunological DiseasesHospital Clínic of BarcelonaInstitut d’Investigacions Biomèdiques August Pi i Sunyer(IDIBAPS)and Universitat de BarcelonaBarcelonaSpain Medicine Faculty Universidad Francisco de VitoriaPozuelo de AlarcónMadridSpain

Olfactory ensheathing glia promote axonal regeneration in the mammalian central nervous system,including retinal ganglion cell axonal growth through the injured optic ***,it is unknown whether olfactory ensheathing glia also have neuroprotective *** ensheathing glia express brain-derived neurotrophic factor,one of the best neuroprotectants for axotomized retinal ganglion ***,we aimed to investigate the neuroprotective capacity of olfactory ensheating glia after optic nerve *** ensheathing glia cells from an established rat immortalized clonal cell line,TEG3,were intravitreally injected in intact and axotomized retinas in syngeneic and allogeneic mode with or without microglial inhibition or immunosuppressive *** and gene expression analyses were *** bulb-derived primary olfactory ensheathing glia and TEG3 express major histocompatibility complex classⅡ*** and syngenically transplanted TEG3 cells survived in the vitreous for up to 21 days,forming an *** axotomized retinas,only the allogeneic TEG3 transplant rescued retinal ganglion cells at 7 days but not at 21 *** these retinas,microglial anatomical activation was higher than after optic nerve crush *** intact retinas,both transplants activated microglial cells and caused retinal ganglion cell death at 21 days,a loss that was higher after allotransplantation,triggered by pyroptosis and partially rescued by microglial inhibition or ***,neuroprotection of axotomized retinal ganglion cells did not improve with these *** different neuroprotective properties,different toxic effects,and different responses to microglial inhibitory treatments of olfactory ensheathing glia in the retina depending on the type of transplant highlight the importance of thorough preclinical studies to explore these variables.

关键词： cell therapy immune recognition major histocompatibility complex class II(MHCII) neuroprotection olfactory ensheathing glia retinal ganglion cells

Bidirectional regulation of fragile X mental retardation protein phosphorylation controls rhodopsin hornoeostasis

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Journal of Molecular Cell Biology 2017年第2期9卷 104-116页

作者： xiao Wang Yawen mu Mengshi Sun Junhai Han Institute of Life Sciences The Key Laboratory of Developmental Genes and Human Disease Southeast University Nanjing 210096 China Co-innovation Center of Neuroregeneration Nantong University Nantong 226001 China

Homoeostatic regulation of the light sensor, rhodopsin, is critical for the maintenance of light sensitivity and survival of photore- ceptors. The major fly rhodopsin, Rhl, undergoes light-induced endocytosis and degradation, but its protein and mRNA levels remain constant during light/dark cycles. It is not clear how translation of Rhl is regulated. Here, we show that adult photorecep- tors maintain a constant, abundant quantity of ninaE mRNA, which encodes Rhl. We demonstrate that the Fmrl protein associ- ates with ninaE mRNA and represses its translation. Further, light exposure triggers a calcium-dependent dephosphorylation of Fmrl, which relieves suppression of Rhl translation. We demonstrate that Mts, the catalytic subunit of protein phosphatase 2A （PP2A）, mediates light-induced Fmrl dephosphorylation in a regulatory B subunit of PP2A （CKa）-dependent manner. Finally, we show that blocking light-induced Rhl translation results in reduced light sensitivity. Our results reveal the molecular mechanism of Rhl homoeostasis and physiological consequence of Rhl dysregulation.

关键词： G protein-coupled receptor rhodopsin fragile X mental retardation protein dephosphorylation calcium protein phosphatase 2A

Fatigue Investigations on Steel Pipeline Containing 3D Coplanar and Non-Coplanar Cracks

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Computers, Materials & Continua 2020年第1期62卷 267-280页

作者： Zhongmin xiao Wengang Zhang Yanmei Zhang mu Fan School of Mechanical and Aerospace Engineering Nanyang Technological University639798Singapore School of Civil Engineering Chongqing UniversityChongqing400045China College of Aerospace Engineering Nanjing University of Aeronautics&AstronauticsNanjing210016China

Fluctuated loadings from currents,waves and sea ground motions are observed on offshore steel pipelines,and they will result in small cracks to propagate continuously and cause unexpected damage to offshore/geotechnical *** spite of the availability of efficient techniques and high-power computers for solving crack problems,investigations on the fatigue life of offshore pipelines with 3D interacting cracks are still rarely found in open *** the current study,systematic numerical investigations are performed on fatigue crack growth behaviours of offshore pipelines containing coplanar and non-coplanar *** finite element method(XFEM)is adopted to simulate the fatigue crack *** qualitative validations of numerical results are made for certain cases with available experimental *** studies are conducted to investigate the influences of various important parameters on fatigue crack *** results will be helpful to assess the fatigue behaviours of steel pipeline with 3D interacting cracks.

关键词： Fatigue crack growth steel pipeline coplanar cracks non-coplanar cracks,XFEM

Adaptive NN Dynamic Surface Control for a Class of Uncertain Non-affine Pure-feedback Systems with Unknown Time-delay

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International Journal of Automation and computing 2016年第3期13卷 268-276页

作者： xiao-Qiang Li Dan Wang Zhu-mu Fu Information Engineering College Henan University of Science and Technology Marine Engineering College Dalian Maritime University

Adaptive neural network （NN） dynamic surface control （DSC） is developed for a class of non-affine pure-feedback systems with unknown time-delay. The problems of ＂explosion of complexity＂ and circular construction of the practical controller in the traditional backstepping algorithm are avoided by using this controller design method. For removing the requirements on the sign of the derivative of function f~, Nussbaum control gain technique is used in control design procedure. The effects of unknown time-delays are eliminated by using appropriate Lyapunov-Krasovskii functionals. Proposed control scheme guarantees that all the signals in the closed-loop system are semi-globally uniformly ultimately bounded. Two simulation examples are presented to demonstrate the method.

关键词： Nonaffine pure-feedback systems dynamic surface control (DSC) time-delay neural network backstepping.