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Science China Mathematics 2020年第4期63卷 777-788页

作者： Qing ding Shiping zhong School of Mathematical Sciences Fudan UniversityShanghai 200433China

By using holomorphic Riemannian geometry in C^3, the coupled Landau-Lifshitz(CLL) equation is proved to be exactly the equation of Schr¨odinger flows from R^1 to the complex 2-sphere CS^2(1) → C^***, regarded as a model of moving complex curves in C^3, the CLL equation is shown to preserve the PT symmetry if the initial data is of the P symmetry. As a consequence, the nonlocal nonlinear Schrodinger(NNLS)equation proposed recently by Ablowitz and Musslimani is proved to be gauge equivalent to the CLL equation with initial data being restricted by the P symmetry. This gives an accurate characterization of the gaugeequivalent magnetic structure of the NNLS equation described roughly by Gadzhimuradov and Agalarov(2016).

关键词： PT symmetry holomorphic Riemannian manifold gauge equivalence

Photon blockade in a cavity–atom optomechanical system

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Chinese Physics B 2022年第7期31卷 127-132页

作者： zhong ding Yong Zhang School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China

We study the single-photon blockade(1 PB),two-photon blockade(2 PB),and photon-induced tunneling(PIT)effects in a cavity–atom optomechanical system in which a two-level atom is coupled to a single-model cavity field via a twophoton *** analyzing the eigenenergy spectrum of the system,we obtain a perfect 1 PB with a high occupancy probability of single-photon excitation,which means that a high-quality and efficient single-photon source can be ***,PIT often occurs in many cases when we consider 2 PB in analogy to 1 *** addition,we find that a 2 PB region will present in the optomechanical system,which can be proved by calculating the correlation function of the model analytically.

关键词： photon blockade photon-induced tunneling cavity–atom optomechanical system

Robust Fault-tolerant Iterative Learning Control for Discrete Systems via Linear Repetitive Processes Theory

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International Journal of Automation and computing 2015年第3期12卷 254-265页

作者： Jian ding Blazej Cichy Krzysztof Galkowski Eric Rogers Hui-zhong yang Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Jiangnan University Institute of Control and Computation Engineering University of Zielona Gora Department of Electronics and Computer Science University of Southampton

This paper addresses the problem of robust iterative learning control design for a class of uncertain multiple-input multipleoutput discrete linear systems with actuator faults. The stability theory for linear repetitive processes is used to develop formulas for gain matrices design, together with convergent conditions in terms of linear matrix inequalities. An extension to deal with model uncertainty of the polytopic or norm bounded form is also developed and an illustrative example is given.

关键词： Iterative learning control linear repetitive processes linear matrix inequality(LMI) discrete linear systems fault-tolerant cont

Piezoresistive effect in MoO3 nanobelts and its application in strain-enhanced oxygen sensors

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Nano Research 2014年第2期7卷 180-189页

作者： Xiaonan Wen Weiqing yang Yong ding Simiao Niu zhong Lin wang School of Material Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332-0245 USA State Key Laboratory of Electronic Thin films and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China Satellite Lab. MANA WPI National Institute of Materials Science Japan

MoO3 nanobelts （NBs） having different properties have been synthesized via a physical vapor deposition （PVD） method. The crystallographic structures and morphologies of the NBs were characterized by X-ray diffraction, transmission electron microscopy and scanning electron microscopy. Electrical measurements were performed and the profound piezoresistive effect in MoO3 experimentally studied and verified. Factors that influence the gauge factor, such as NB size, doping concentration and atmosphere composition, are discussed and analyzed. Gas sensing performance was also tested in devices and it was demonstrated that by applying strain to the gas sensor, its sensing performance could be effectively tuned and enhanced. This study provides the first demonstration of significant piezoresistivity in MoO3 NBs and the first illustration of a generic mechanism by means of which this effect can be coupled with other electronic modulation measures to afford better device performance and broader material functionality.

关键词： molybdenum trioxide nanobelt piezoresistive effect oxygen sensor

Susceptibility breakpoint for cefquinome against Escherichia coli and Staphylococcus aureus from pigs

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Journal of Integrative Agriculture 2021年第7期20卷 1921-1932页

作者： ZHANG Hui-lin ZHAO Yi-yang ZHOU Zi-chong ding Huan-zhong Guangdong Key Laboratory for Veterinary Drug Development and Safety Evaluation South China Agricultural UniversityGuangzhou 510000P.R.China

Cefquinome is the only fourth-generation cephalosporin used solely for veterinary *** this study,we established the wild-type cut-off(CO_(WT))and pharmacokinetic/pharmacodynamic cut-off(CO_(PD))of cefquinome against Escherichia coli and Staphylococcus aureus.A total of 210 *** and 160 *** isolates were collected from pigs in Guangdong Province between 2014 and *** minimum inhibitory concentrations(MICs)were determined using a microdilution broth ***_(50)and MIC_(90)were 0.06 and 0.25μg m L^(–1)for *** and 0.5 and 1μg m L^(–1)for ***,*** analysis and the ECOFFinder Program showed that the CO_(WT)for cefquinome against *** and *** were0.125 and 2μg m L^(–1),*** resistance rates were 11.9%for *** and 6.25%for *** on a5000-subject Monte Carlo simulation,the CO_(PD)value for cefquinome against *** and *** was 0.25μg m L^(–1)under the recommended dose(2 mg kg^(–1),twice a day for 3 days),confirming that infections caused by strains with MIC≤0.25μg m L^(–1)could be effectively *** adjustment of the dosing regimen to 4.5 mg kg^(–1),effective treatment(>90)was achieved for *** infections with MIC_(90)1μg m L^(–1).This susceptibility breakpoint determination is significant for resistant surveillance and cefquinome dosage guidance against *** and *** in pigs.

关键词： cefquinome Escherichia coli Staphylococcus aureus CO_(WT) CO_(PD)

Evaluation and structural analysis of the functions of the Tibetan Plateau National Park Cluster

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Journal of Geographical Sciences 2022年第5期32卷 957-980页

作者： CHEN Dongjun zhong Linsheng FAN Jie YU Hu yang ding ZENG Yuxi Key Laboratory of Regional Sustainable Development Modeling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing100101China School of Tourism and Urban Management Jiangxi University of Finance and EconomicsNanchang330013China College of Resources and Environment University of Chinese Academy of SciencesBeijing100049China

National parks are useful entities for looking at coordinated efforts to improve the Tibetan Plateau’s function as an ecological safety barrier and the region’s green *** on the characteristics of the function structures of the Tibetan Plateau’s national parks is vital to promoting their systematic and coordinated *** paper combines the pressure-state-response model,the rank-size rule and a coupling and coordination model to identify and evaluate the functions of national parks on the Tibetan Plateau and to analyze the categories,hierarchy and structures behind those *** results indicate the following:(1)The Tibetan Plateau National Park Cluster needs to maintain internal and external *** it needs to rationally allocate resources between ecological protection,recreation and community development,and externally it needs to promote its role as an ecological security barrier and promote regional green development by rationally ranking and organizing the individual national parks,so as to handle their co-evolution of functions at multiple scales.(2)Ecological protection,recreation and community development are the most prominent functions of the Tibetan Plateau National Park Cluster,but there is scope to develop their scientific research and education *** Zipf index shows that their multi-functional level conforms with the rank-size rule,indicating balanced *** national parks need to strengthen their optimal functions according to their characteristic localization.(3)The degree of coupling between the functions of the Tibetan Plateau National Park Cluster is 0.7809,and the degree of coordination is 0.6227,which indicates a very strong coupling and moderate *** coupling strength and degree of coordination between the multiple functions vary greatly among the individual national parks,which reflects their different function *** are four function structure types:

关键词： national park cluster function structure function evaluation Tibetan Plateau

Bioinformatic identification of key genes and pathways that may be involved in the pathogenesis of HBV-associated acute liver failure

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Genes & Diseases 2018年第4期5卷 349-357页

作者： Yalan yang Zhaohui zhong Yubin ding Wanfeng Zhang yang Ma Li Zhou School of Public Health and Management Chongqing Medical UniversityChongqing400016China Research Center for Medicine and Social Development Chongqing400016China Innovation Center for Social Risk Governance in Health Chongqing400016China Department of Bioinformatics Chongqing Medical UniversityChongqing400016China

In order to explore the molecular mechanisms behind the pathogenesis of acute liver failure(ALF)associated with hepatitis B virus(HBV)infection,the present study aimed to identify potential key genes and pathways involved using samples from patients with HBV-associated *** GSE38941 array dataset was downloaded from the Gene Expression Omnibus database,and differentially expressed genes(DEGs)between 10 liver samples from 10 healthy donors and 17 liver specimens from 4 patients with HBV-associated ALF were analyzed using the Linear Models for Microarray Data *** Ontology and KEGG pathway enrichment analyses of the DEGs were performed,followed by functional annotation of the genes and construction of a proteineprotein interaction(PPI)*** modules were subsequently identified and *** total,3142 DEGs were identified,of which 1755 were upregulated and 1387 were *** extracellular exosome,immune response,and inflammatory response pathways may potentially be used as biomarkers of ALF *** total,17 genes(including CCR5,CXCR4,ALB,C3,VGEFA,and IGF1)were identified as hub genes in the PPI network and may therefore be potential marker genes for HBV-associated ALF.

关键词： Differentially expressed genes Function enrichment analysis HBV-associated ALF Module analysis Proteineprotein interaction network

A state-of-the-art review on transition between the fast fluidization and pneumatic transport of Geldart group B particles

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Particuology 2023年第2期73卷 78-94页

作者： Boyu Deng Yi Zhang Man Zhang Yi ding Tuo Zhou Xinhua yang zhong Huang Hairui yang Guangxi Yue State Key Laboratory of Power Systems Department of Energy and Power EngineeringTsinghua UniversityBeijing100084China China Electric Power Planning&Engineering Institute Beijing100120China SDIC Power Holding Co. LtdBeijing100034China

The fluidization state in the circulating fluidized bed(CFB)boiler is crucial to its stable and safe ***,up to now,the research field has not reached unanimity on whether the fluidization regime that the upper furnace of the boiler operates in is the fast fluidization or pneumatic *** this end,this paper reviewed relevant research on the transition between the fast fluidization and pneumatic transport of Geldart group B particles,including the flow characteristics of the fast fluidization,the transition condition between the fast fluidization and pneumatic transport,the determination methods of the transport velocity utr and saturation carrying capacity G_(s)* and the influencing factors on these two *** research findings can provide certain guidelines for the design and optimization of the CFB boiler,and result in plenty of prediction correlations for utr and G_(s)*.Nonetheless,owing to insufficient data available on Geldart group B particles,especially the ones obtained under high temperature or pressure conditions and in large-scale CFB apparatuses,the existing correlations are not well suited for the prediction of u_(tr) and G_(s)* of Geldart group B ***,further efforts are urgently demanded on the fast fluidization transition of Geldart group B particles.

关键词： Fast fluidization transition Transport velocity Saturation carrying capacity Geldart group B particles Circulating fluidized bed

Palladium-assisted Metal Patterning on Polyimide Surfaces

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Chinese Journal of Polymer Science 2022年第10期40卷 1287-1296,I0011页

作者： Shi-Long zhong Bai-yang Zhou Xi-Rui Gu ding-Shan Yu Xu-Dong Chen Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education Key Laboratory of High Performance Polymer-based Composites of Guangdong Province School of Chemistry Sun Yat-sen UniversityGuangzhou 510275China

A novel method of patterning high precision copper conductive micropatterns on flexible polymer substrate(polyimide)is *** utilized the coordination effect between palladium salts and pyridine structures to fix the palladium chloride(PdCl_(2))on the surface of polymer film while the 2,6-dimethylpyridine structures formed in the specific areas under ultraviolet light guaranteed the resolution of final *** thermal reduction of PdCl_(2) on the surface can be achieved in the process of thermal cyclization of the polymer *** a consequence,the obtained polyimide(PI)film can be patterned with conductive copper micropatterns directly by electroless *** particular,we accomplished the deposition of high precision copper pattern with a minimum line width of 50μm and minimum line spacing of 20μm on PI thin films(thickness~10μm)by electroless *** prepared conductive copper micropatterns exhibit a low resistivity of 1.78μΩ·cm the same as the pure block *** the relationship between the structures of the polymer chains and the physical properties of polymer substrates,such as the dimensional stability,mechanical and dielectric properties were also discussed in *** simple and novel method of patterning metal on the polymer surface does not need to achieve the catalytic metal adhesion required for electroless plating at the cost of destroying the substrate surface and avoiding the introduction of unstable *** patterning method is compatible with the current roll-to-roll production process and can be used to develop high-performance micro-integrated circuits.

关键词： Polyimide Metal patterning Electroless plating Palladium chloride Coordination effect

Stability Analysis of Distributed Parameter Systems on Temperature Measurement of Large-scale Objects

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Journal of Thermal Science 2007年第3期16卷 248-253页

作者： Zhenliang ding Li zhong Feng YUAN Department of Electronic Engineering School of Automatic Measurement and Control Harbin Institute of Technology 150001 Harbin China

In this paper, the mechanical construction, thermal regulator design and temperature measurement system of a local area were set up for large-scale linear measurement. Numerical analysis based on temperature correlated characteristic is discussed to obtain optimal observation points for the measurements. The horizontal temperature distribution of the measured area is compared with the measurement of the variation of temperature at 15℃ and 20℃ over time, and characteristic of dynamic response is also discussed. In addition, the long-time stability of measured temperature is analyzed by means of using the standard deviation. It characterizes the temperature distribution performance of a large area and how it may impact the measurement of a large-scale object.

关键词： temperature control temperature measurement distribution parameter linear measurement.