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Synchronization of stochastically hybrid coupled neural networks with coupling discrete and distributed time-varying delays

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Chinese Physics B 2008年第11期17卷 4080-4090页

作者：唐漾钟恢凰方建安 Department of Automation Donghua University Department of Communication Donghua University

A general model of linearly stochastically coupled identical connected neural networks with hybrid coupling is proposed, which is composed of constant coupling, coupling discrete time-varying delay and coupling distributed timevarying delay. All the coupling terms are subjected to stochastic disturbances described in terms of Brownian motion, which reflects a more realistic dynamical behaviour of coupled systems in practice. Based on a simple adaptive feedback controller and stochastic stability theory, several sufficient criteria are presented to ensure the synchronization of linearly stochastically coupled complex networks with coupling mixed time-varying delays. Finally, numerical simulations illustrated by scale-free complex networks verify the effectiveness of the proposed controllers.

关键词： stochastically hybrid coupling discrete and distributed time-varying delays complex dynamical networks chaotic neural networks

Degradation of Dye Wastewater by ns-Pulse DBD Plasma

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Plasma Science and Technology 2013年第9期15卷 928-934页

作者：高进顾平道袁里钟方川 College of Science Donghua University College of Environmental Science and Engineering Donghua University

Two plasma reactors have been developed and used to degrade dye wastewater agents. The configuration of one plasma reactor is a comb-like extendable unit module consisting of 5 electrodes covered with a quartz tube and the other one is an array reactor which is extended from the unit module. The decomposition of wastewater by ns pulse dielectric barrier discharge （DBD） plasma have been carried out by atomizing the dyeing solutions into the reactors. During experiments, the indigo carmine has been treated as the waste agent. The measurements of UV-VIS absorption spectroscopy and the chemical oxygen demand （COD） are carried out to demonstrate the decomposition effect on the wastewater. It shows that the decoloration rate of 99% and the COD degradation rate of 65% are achieved with 15 min treatment in the unit reactor. The effect of electrical parameters on degradation has been studied in detail. Results from the array reactor indicate that it has a better degradation effect than the unit one. It can not only totally remove the chromogenic bond of the indigo carmine solution, but also effectively degrade unsaturated bonds. The decoloration rate reaches 99% after 10 min treatment, the decomposition rate of the unsaturated bond reaches 83% after 60 min treatment, and the COD degradation rate is nearly 74%.

关键词： ns pulse discharge degradation dye atomization

Sterilization of Staphylococcus Aureus by an Atmospheric Non-Thermal Plasma Jet

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Plasma Science and Technology 2013年第5期15卷 439-442页

作者：刘小虎洪枫郭颖张菁石建军 College of Materials Science and Engineering Donghua University College of Chemistry Chemical Engineering and Biotechnology Donghua University College of Science Donghua University

An atmospheric non-thermal plasma jet was developed for sterilizing the Staphylococcus aureus （S. aureus）. The plasma jet was generated by dielectric barrier discharge （DBD）, which was characterized by electrical and optical diagnostics. The survival curves of the bacteria showed that the plasma jet could effectively inactivate 10 6 cells of S. aureus within 120 seconds and the sterilizing efficiency depended critically on the discharge parameter of the applied voltage. It was further confirmed by scanning electron microscopy （SEM） that the cell morphology was seriously damaged by the plasma treatment. The plasma sterilization mechanism of S. aureus was attributed to the active species of OH, N 2 ＋ and O, which were generated abundantly in the plasma jet and characterized by OES. Our findings suggest a convenient and low-cost way for sterilization and inactivation of bacteria.

关键词： non-thermal plasma jet atmospheric pressure sterilization

“Zero‑Strain” NiNb_(2)O_(6) Fibers for All‑Climate Lithium Storage

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Nano-Micro Letters 2025年第1期17卷 348-360页

作者： Yan Zhao Qiang Yuan Liting Yang Guisheng Liang Yifeng Cheng Limin Wu Chunfu Lin Renchao Che College of Physics Donghua UniversityShanghai 201620People’s Republic of China School of Materials Science and Engineering Institute of Materials for Energy and EnvironmentQingdao UniversityQingdao 266071People’s Republic of China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China Inner Mongolia university Hohhot 010021People’s Republic of China

Niobates are promising all-climate Li^(+)-storage anode material due to their fast charge transport,large specific capacities,and resistance to electrolyte ***,their moderate unit-cellvolume expansion(generally 5%–10%)during Li^(+)storage causes unsatisfactory long-term ***,“zero-strain”NiNb_(2)O_(6) fibers are explored as a new anode material with comprehensively good electrochemical *** Li^(+)storage,the expansion of electrochemical inactive NiO_(6) octahedra almost fully offsets the shrinkage of active NbO_(6) octahedra through reversible O *** superior volume-accommodation capability of the NiO_(6) layers guarantees the“zero-strain”behavior of NiNb_(2)O_(6) in a broad temperature range(0.53%//0.51%//0.74%at 25//−10//60℃),leading to the excellent cyclability of the NiNb_(2)O_(6) fibers(92.8%//99.2%//91.1%capacity retention after 1000//2000//1000 cycles at 10C and 25//−10//60℃).This NiNb_(2)O_(6) material further exhibits a large reversible capacity(300//184//318 mAh g−1 at 0.1C and 25//−10//60℃)and outstanding rate performance(10 to 0.5C capacity percentage of 64.3%//50.0%//65.4%at 25//−10//60℃).Therefore,the NiNb_(2)O_(6) fibers are especially suitable for large-capacity,fast-charging,long-life,and all-climate lithium-ion batteries.

关键词： NiNb_(2)O_(6)porous fiber “Zero-strain”mechanism Electrochemical property Harsh-temperature operation Operando characterization

Surface Modification of Polyimide Film by Dielectric Barrier Discharge at Atmospheric Pressure

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Plasma Science and Technology 2016年第4期18卷 337-341页

作者：彭释李灵均李炜王超梁郭颖石建军张菁 College of Textile Donghua University Department of Applied Physics Donghua University Member of Magnetic Confinement Fusion Research Center Ministry of EducationDonghua University

In this paper,polyimide（PI）films are modified using an atmospheric pressure plasma generated by a dielectric barrier discharge（DBD）in *** performance of PI film and its dependence on exposure time from 0 s to 300 s are investigated by dynamic water contact angle（WCA）,field emission scanning electron microscopy（FESEM）,and Fourier transform infrared spectroscopy in attenuated total multiple reflection mode（FTIR-ATR）.The study demonstrates that dynamic WCA exhibits a minimum with 40 s plasma treatment,and evenly distributed nano-dots and shadow concaves appeared for 40 s and 12 s Ar plasma treatment individually.A short period of plasma modification can contribute to the scission of the imide ring and the introduction of C-O and C=O（-COOH）by detailed analysis of FTIR-ATR.

关键词： DBD atmospheric pressure surface modification polyimide treatment duration

Multicast Capacity of Cache Enabled Content-Centric Wireless Ad Hoc Networks

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China Communications 2017年第7期14卷 25-33页

作者： Guanglin Zhang Jian Liu Jiajie Ren the Department of Communication Engineering Donghua University donghua university the Department of Communication Engineering College of Information Science and TechnologyDonghua University

In this paper, we investigate the upper bound of multicast capacity for content-centric wireless ad hoc networks with content-centric hierarchical routing strategy. We consider two content-centric hierarchical routing strategies, namely, the homogeneous hierarchical routing strategy where each content is requested and cached with equal probability, and the heterogenous hierarchical routing strategy where each content is cached with different probabilities and the requested contents follow a Zipf content popularity distribution. For the two proposed hierarchical routing strategies, we establish the upper bounds on multicast capacity of content-centric wireless ad hoc networks, respectively. We then discuss how the system parameters, such as the number of nodes n, the number of users p, the cache size C, the probability of cache and the content popularity distribution impact on the muilticast capacity scalings.

关键词：无线自组织网络缓存大小容量组播路由策略基于内容分层策略用户数量

Surface Modification of PBO Fibers for Composites by Coaxial Atmospheric Dielectric Barrier Discharge (PLA-PLA)

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Plasma Science and Technology 2013年第5期15卷 429-434页

作者：胡倩倩徐金洲周振兴张菁 College of Materials Science and Engineering Donghua University Department of Applied Physics College of Science Donghua University

In this work, the surface modification of poly （1, 4-phenylene-cis-benzobisoxazole）（PBO） fibers by O 2 /Ar coaxial atmospheric dielectric barrier discharge was investigated, as well as the interfacial adhesion properties of modified PBO fibers/epoxy composites. The results indicated that the contact angle decreased remarkably from 84.7 to 63.5 after 3 min O 2 /Ar plasma treatment. SEM and AFM images showed that the surface of the treated PBO fibers became rather rough. In addition, XPS results suggested that the polar functional group （O=C- O） was introduced on the surface of the treated PBO fiber. The interfacial adhesion test showed that the interfacial shear strength （IFSS） and the interlaminar shear strength （ILSS） increased significantly by 63.54% and 130%, respectively. Moreover, the excellent tensile property of the PBO fibres was well preserved.

关键词： plasma treatment poly (1 4-phenylene-cis-benzobisoxazole) (PBO) fibers,coaxial atmospheric dielectric barrier discharge IFSS

Multiplexed reflective-matched optical fiber grating interrogation technique

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Chinese Optics Letters 2007年第3期5卷 135-137页

作者：詹亚歌薛绍林杨沁玉 College of Science donghua university

The multiplexed-reflective matched fiber grating interrogation technique was presented in this paper. The interrogation technique was based on the use of two （or more） wavelength-matched fiber Bragg gratings （FBGs） to receive the reflected signal from the sensing FBG. The two （or more） matched gratings were arranged parallelly and used as filters to convert wavelength into intensity encoded information for interrogation. Theoretical and experimental results demonstrated that the interrogation system is immune to the source fluctuation and cross-sensitivity effect between temperature and strain, and also can enlarge the dynamic range.

关键词： Multiplexing Optical fibers Pattern matching Strain Temperature

The Gas Nucleation Process Study of Anatase TiO_2 in Atmospheric Non-Thermal Plasma Enhanced Chemical Vapor Deposition

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Plasma Science and Technology 2014年第1期16卷 32-36页

作者：吴茂水徐雨戴林君王恬恬李雪王德信郭颖丁可黄晓江石建军张菁 Department of Applied Physics Donghua University College of Material Science Donghua University Member of Magnetic Confinement Fusion Research Center Ministry of EducationDonghua University

Abstract The gas phase nucleation process of anatase TiO2 in atmospheric non-thermal plasma enhanced chemical vapor deposition is studied. The particles synthesized in the plasma gas phase at different power density were collected outside of the reactor. The structure of the collected particles has been investigated by field scanning electron microscope （FESEM）, X-ray diffraction （XRD）, high resolution transmission electron microscopy （HRTEM） and selected area electron diffraction （SAED）. The analysis shows that uniform crystalline nuclei with average size of several nanometers have been formed in the scale of micro second through this reactive atmo- spheric plasma gas process. The crystallinity of the nanoparticles increases with power density. The high density of crystalline nanonuclei in the plasma gas phase and the low gas temperature are beneficial to the fast deposition of the 3D porous anatase TiO2 film.

关键词： gas phase nucleation TiO2 nanoparticles plasma enhanced chemical vapordeposition (PECVD) 3D nanostructured films atmospheric pressure