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Sensing Characteristics of Mixed-Potential-Type YSZ-Based NO_x Sensor Using Au-Doped NiO Sensing Electrode

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稀有金属材料与工程 2006年第A3期35卷 36-39页

作者： vladimir V.Plashnitsa Taro Ueda Norio Miura Art Science and Technology Center for Cooperative ResearchKyushu UniversityKasuga-ShiFukuoka 816-8580Japan Interdisciplinary Graduate School of Engineering Sciences Kyushu UniversityKasuga-shiFukuoka 816-8580Japan

The nano-structured NiO powder obtained by sol-gel method was doped with 10 wt% gold in order to modify its morphology as well as its electrochemical catalytic *** NO_x sensing characteristics of mixed-potential-type YSZ-based planar sensors attached with each of the nano-NiO and the Au-doped nano-NiO materials as a sensing electrode SE) were examined at temperatures of 700℃～800℃.The Au-doped NiO-SE was found to give a large enhancement in the NO_2 sensitivity as well as the NO_2 selectivity at 800℃under wet condition,in comparison with the pure *** reason for the improvement in the NO_2 sensitivity was examined based on the data of polarization curves,impedance spectra and catalytic activity for the gas-phase NO_2 decomposition.

关键词： NO_x sensor mixed potential NiO nanostructure YSZ Au

GaN功率放大器非线性对无线通信系统的影响研究

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GaN功率放大器非线性对无线通信系统的影响研究

Towards Better Understanding of KSHV Life Cycle: from Transcription and Posttranscriptional Regulations to Pathogenesis

2024年全国微波毫米波会议（中国微波年会）

作者：杜宏宇宋章磊万发雨 vladimir Mordachev Eugene Sinkevich Dmitry Viktorovich Kholodnyak 南京信息工程大学圣彼得堡电工大学

本文研究了3.5GHz Ga N功率放大器的非线性特性及其对无线通信系统性能的影响。首先设计了一款S波段Ga N功率放大器,通过实验测试和分析,得到了3.5GHz Ga N功率放大器线性增益45.5d B,饱和功率40.5d Bm,饱和效率26.9%,1d B压缩点34.6d ... 详细信息

本文研究了3.5GHz Ga N功率放大器的非线性特性及其对无线通信系统性能的影响。首先设计了一款S波段Ga N功率放大器,通过实验测试和分析,得到了3.5GHz Ga N功率放大器线性增益45.5d B,饱和功率40.5d Bm,饱和效率26.9%,1d B压缩点34.6d Bm,该输出功率下三阶交调抑制大于24.5d Bc等射频特性。接着在通信系统性能测试中,对功率放大器非线性在QPSK调制方式下对系统误差向量幅度(EVM)和信噪比(SNR)的影响进行了分析。结果表明,在高功率输入条件下,非线性失真显著降低了通信系统的性能。

关键词： GaN功率放大器非线性特性无线通信系统

来源： cnki会议评论

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Virologica Sinica 2019年第2期34卷 135-161页

作者： Lijun Yan vladimir Majerciak Zhi-Ming Zheng Ke Lan State Key Laboratory of Virology College of Life Sciences Wuhan University Wuhan 430072 China National Cancer Institute National Institutes of Health Frederick MD 21702 USA

Kaposi’s sarcoma-associated herpesvirus(KSHV), also known as human herpesvirus-8(HHV-8), is etiologically linked to the development of Kaposi’s sarcoma, primary effusion lymphoma, and multicentric Castleman’s disease. These malignancies often occur in immunosuppressed individuals, making KSHV infection-associated diseases an increasing global health concern with persistence of the AIDS epidemic. KSHV exhibits biphasic life cycles between latent and lytic infection and extensive transcriptional and posttranscriptional regulation of gene expression. As a member of the herpesvirus family, KSHV has evolved many strategies to evade the host immune response, which help the virus establish a successful lifelong infection. In this review, we summarize the current research status on the biology of latent and lytic viral infection, the regulation of viral life cycles and the related pathogenesis.

关键词： Kaposi's sarcoma-associated herpesvirus (KSHV) Human herpesvirus 8 (HHV-8)- Transcription Posttranscriptonal regulation ORF57

Reply to Discussion on “Analysis of Bingham fluid radial flow in smooth fractures”

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Journal of Rock Mechanics and Geotechnical Engineering 2021年第4期13卷 945-946页

作者： Liangchao Zou Ulf Håkansson vladimir Cvetkovic Division of Resources Energy and InfrastructureDepartment of Sustainable DevelopmentEnvironmental Science and EngineeringRoyal Institute of TechnologyStockholm10044Sweden Division of Soil and Rock Mechanics Department of Civil and Architectural EngineeringRoyal Institute of TechnologyStockholm10044Sweden Skanska AB Stockholm11274Sweden

Recently,Hoang et al.(2021)discussed our paper Zou et al.(2020).In our paper,we made a statement that Dai and Bird(1981)’s solution for two-dimensional(2 D)radial Bingham fluid flow between parallel plates violates mass *** et *** out that Dai and Bird(1981)’s solution does not violate the mass balance because Dai and Bird(1981)’s solution and our analysis are based on different assumptions,*** consideration of the vertical velocity component in the continuity equation or not,which leads to two different approximation *** this sense,the mass balance of Dai and Bird(1981)’s solution should not be checked using our solution as a *** this reply,we add remarks on the two approximation models and their implication for rock grouting *** discussion by Hoang et *** this reply are helpful to thoroughly eliminate the existing confusion regarding the two solutions in the rock grouting research community.

关键词： Rock grouting Radial flow Bingham fluid Approximation solution

Vapor film collapse triggered by external pressure pulse and the fragmentation of melt droplet in FCIs

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Nuclear Science and Techniques 2008年第4期19卷 246-250页

作者： LIN Qian TONG Lili CAO Xuewu KRIVENTSEV vladimir School of Nuclear Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Obninsk State University for Nuclear Power Engineering Obninsk Russia

The fragmentation process of high-temperature molten drop is a key factor to determine the ratio heat transferred to power in FCIs,which estimates the possible damage degree during the hypothetical severe accident in the nuclear reactors. In this paper,the fragmentation process of melt droplet in FCIs is investigated by theoretic analysis. The fragmentation mechanism is studied when an external pressure pulse applied to a melt droplet,which is surrounded by vapor film. The vapor film collapse which induces fragmentation of melt droplet is analyzed and modeled. And then the generated pressure is calculated. The vapor film collapse model is introduced to fragmentation correlation,and the predicted fragment size is calculated and compared with experimental data. The result shows that the developed model can predict the diameter of fragments and can be used to calculate the fragmentation process appreciatively.

关键词：反应堆压力脉冲薄膜核技术

Advances in small animal mesentery models for in vivo flow cytometry,dynamic microscopy,and drug screening

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World Journal of Gastroenterology 2007年第2期13卷 192-218页

作者： Ekaterina I Galanzha Valery V Tuchin vladimir P Zharov Philips Classic Laser Laboratories University of Arkansas for Medical Sciences (UAMS) Little Rock AR United States Department of Optics and Biomedical Physics Research-Educational Institute of Optics and Biophotonics Saratov State University Saratov Russia Department of Optics and Biomedical Physics Research-Educational Institute of Optics and Biophotonics Saratov State University Saratov Russia Philips Classic Laser Laboratories University of Arkansas for Medical Sciences (UAMS) Little Rock AR United States

Using animal mesentery with intravital optical microscopy is a well-established experimental model for studying blood and lymph microcirculation in vivo. Recent advances in cell biology and optical techniques provide the basis for extending this model for new applications, which should generate significantly improved experimental data. This review summarizes the achievements in this specific area, including in vivo label-free blood and lymph photothermal flow cytometry, super-sensitive fluorescence image cytometry, light scattering and speckle flow cytometry, microvessel dynamic microscopy, infrared (IR) angiography, and high-speed imaging of individual cells in fast flow. The capabilities of these techniques, using the rat mesentery model, were demonstrated in various studies; e.g., real-time quantitative detection of circulating and migrating individual blood and cancer cells, studies on vascular dynamics with a focus on lymphatics under normal conditions and under different interventions (e.g. lasers, drugs, nicotine), assessment of lymphatic disturbances from experimental lymphedema, monitoring cell traffic between blood and lymph systems, and high-speed imaging of cell transient deformability in flow. In particular, the obtained results demonstrated that individual cell transportation in living organisms depends on cell type (e.g., normal blood or leukemic cells), the cell’s functional state (e.g., live, apoptotic, or necrotic), and the functional status of the organism. Possible future applications, including in vivo early diagnosis and prevention of disease, monitoring immune response and apoptosis, chemo- and radio-sensitivity tests, and drug screening, are also discussed.

关键词： Lymph microcirculation Transmission digital microscopy Rat mesentery Flow cytometry Photothermal technique

Transient expression of inactive RB in mesenchymal stem cells impairs their adipogenic potential and is associated with hypermethylation of the PPARγ2 promoter

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Genes & Diseases 2022年第1期9卷 165-175页

作者： Mikhail Baryshev Nikolai Petrov vladimir Ryabov Boris Popov Institute of Cytology Russian Academy of Sciences St.Petersburg4Tikhoretsky Av.194064St.PetersburgRussia Institute of Microbiology and Virology Riga Stradins UniversityRatsupites 5LV-1067RigaLatvia Developmental Therapeutics Branch National Cancer InstituteNational Institutes of HealthBethesdaMaryland 20892USA

The retinoblastoma gene product(pRb)is a chromatin-associated protein that can either suppress or promote activity of key regulators of tissue-specific *** found that twelve weeks after transfection of the exogenous active(ΔB/X andΔр34)or inactive(ΔS/N)forms of RB into the 10T1/2 mesenchymal stem cells and clonal selection not a single cell line did contain exogenous RB,despite being G-418 ***,the consequences of the transient production of exogenous RB had different effects on the cell ***ΔB/X andΔр34 cells transfected with active form of RB showed elevated levels of inducible adipocyte differentiation(AD).On the contrary,theΔS/N cells transfected with inactive RB mutant were insensitive to induction of AD associated with abolishing of expression of the PPARγ***,the PPARγ2 promoter in undifferentiatedΔS/N cells was hypermethylated,but all except−60 position CpG became mostly demethylated after cells exposure to *** conclude that while transient expression of inactive exogenous RB induces long term epigenetic alterations that prevent adipogenesis,production of active exogenous RBs results in an AD-promoting epigenetic *** results indicate that pRb is involved in the establishment of hereditary epigenetic memory at least by creating a methylation pattern of PPARγ2.

关键词： Adipogenic differentiation DNA methyltransferase 1 Mesenchymal stem cells MSCs RB Retinoblastoma susceptibility gene

The Cauchy Problem for Coupled Nonlinear Schrdinger Equations with Linear Damping： Local and Global Existence and Blowup of Solutions

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Chinese Annals of Mathematics,Series B 2016年第5期37卷 665-682页

作者： Joao-Paulo DIAS Mario FIGUEIRA vladimir V. KONOTOP LCMAF-CIO Faculdade de Ciencias Universidade de Lisboa Av. Prof. Gama Pinto 2 1649-003 Lisboa Portugal. Centro de Fisica Teorica e Computacional and Departamento de Fisica Faculdade de Ciencias Universidade de Lisboa Campo Grande Ed.C8 1749-016 Lisboa Portugal.

The authors study, by applying and extending the methods developed by Cazenave(2003), Dias and Figueira(2014), Dias et al.(2014), Glassey(1994–1997), Kato(1987), Ohta and Todorova(2009) and Tsutsumi(1984), the Cauchy problem for a damped coupled system of nonlinear Schrdinger equations and they obtain new results on the local and global existence of H^1-strong solutions and on their possible blowup in the supercritical case and in a special situation, in the critical or supercritical cases.

关键词： supercritical Cauchy applying estimates proof admissible constants uniqueness nonlinearity inequality

Metal-containing nanomaterials as lubricant additives: State-of-the-art and future development

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Friction 2019年第2期7卷 93-116页

作者： Igor E.UFLYAND vladimir A.ZHINZHILO Victoria E.BURLAKOVA Department of Chemistry Southern Federal University Department of Chemistry Don State Technical University

This review focuses on the effect of metal-containing nanomaterials on tribological performance in oil lubrication. The basic data on nanolubricants based on nanoparticles of metals, metal oxides, metal sulfides, nanocomposities, and rare-earth compounds are generalized. The influence of nanoparticle size, morphology, surface functionalization, and concentration on friction and wear is analyzed. The lubrication mechanisms of nanolubricants are discussed. The problems and prospects for the development of metal-containing nanomaterials as lubricant additives are considered. The bibliography includes articles published during the last five years.

关键词： coefficient of friction metal-containing nanomaterials nanolubricants nanoparticles wear