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Structure of Coexistence States for a Class of Quasilinear Elliptic Systems

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Acta Mathematica Sinica,English Series 2007年第9期23卷 1649-1662页

作者： guo ying yang Ming Xin WANG Department of Mathematics He'nan Polytechnic University Jiaozuo 454003 P. R. China Department of Mathematics Xuzhou Normal University Xuzhou 221116 P. R. China and Department of Mathematics Southeast University Nanjing 210018 P. R. China

The structure of positive solutions of the p-Laplacian systems is discussed via bifurcation theory and monotone techniques.

关键词： coexistence states quasilinear elliptic systems bifurcation

A Note on a Diffusive Predator-prey Model and Its Steady-state System

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Acta Mathematica Sinica,English Series 2010年第5期26卷 963-974页

作者： Rui PENG Ming Xin WANG guo ying yang Institute of Nonlinear Complex Systems College of Science China Three Gorges University Yichang 443002 P. R. China Department of Mathematics Southeast University Nanjing 210096 P. R. China Department of Mathematics Henan Polytechnic University Jiaozuo 454100 P. R. China

In this note, a diffusive predator-prey model subject to the homogeneous Neumann bound- ary condition is investigated and some qualitative analysis of solutions to this reaction-diffusion system and its corresponding steady-state problem is presented. In particular, by use of a Lyapunov function, the global stability of the constant positive steady state is discussed. For the associated steady state problem, a priori estimates for positive steady states are derived and some non-existence results for non-constant positive steady states are also established when one of the diffusion rates is large enough. Consequently, our results extend and complement the existing ones on this model.

关键词： a diffusive predator-prey model steady states global stability a priori-estimates non-existence

Ultrastructure of the Mature Egg and Fertilization in the Fern Ceratopteris thalictroides

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Journal of Integrative Plant Biology 2009年第3期51卷 243-250页

作者： Jian-guo Cao Nai-ying yang Quan-Xi Wang College of Life and Environment Sciences Shanghai Normal University Shanghai 200234 China

The ultrastructure of the mature egg and fertilization in the fern Ceratopteris thafictroides （L.） Brongn. were observed by transmission electron microscopy. The results revealed that the mature egg possesses an obvious egg membrane at the periphery of the egg. Furthermore, a fertilization pore was identified in the upper egg membrane of the mature egg. The structure of the pore is described for the first time. The fertilization experiment indicated that spermatozoids crowd into the cavity above the egg through the neck canal of the archegonium; however, only one of these can penetrate into the egg through the fertilization pore. Immediately on penetration of the spermatozoid, the egg begins to shrink. The volume of the fertilized egg decreases to almost one-half that of the unfertilized egg. As a result, the protoplasm of the fertilized egg becomes dense and opaque, which may lead to a situation where the organelles of both the egg and the fertilizing spermatozoid become indistinguishable. Simultaneously, abundant vesicles containing concentric membranes or opaque materials appear near the fertilization pore in the cytoplasm of the fertilized egg. These vesicles are considered to act as a barrier that prevents polyspermy. The present study provides a new insight into the ultrastructure of the mature egg and the cytological mechanism of fertilization in ferns.

关键词： Ceratopteris thalictroides fern fertilization fertilization pore.

Efficient application of carbon-based nanomaterials for high-performance perovskite solar cells

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Rare Metals 2021年第10期40卷 2747-2762页

作者： ying-Chun Niu Li-Feng yang M.H.Aldamasy Meng Li Wen-Jie Lan Quan Xu Yuan Liu Shang-Lei Feng ying-guo yang State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Shanghai Synchrotron Radiation Facility(SSRF) Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Shanghai Institute of Applied Physics Chinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai 201800China Helmholtz-Zentrum Berlin für Materialien und Energie Berlin 12489Germany M.H.Aldamasy Egyptian Petroleum Research InstituteCairo 11727Egypt Egyptian Petroleum Research Institute Cairo 11727Egypt Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument Beijing Information Science and Technology UniversityBeijing 100192China

The power conversion efficiency of perovskite solar cells(PSCs) has rapidly risen from 3.8% to over25.0% in just about one decade, which attracts a lot of attention from the scientific and engineering ***, some challenges remain, hindering the progress of commercialization such as intrinsic and extrinsic(environmental) stabilities, which can be improved by an interface and structural engineering. In recent years, some reports indicate that the interfacial engineering using carbon-based nanomaterials additives plays a crucial role in the process of charge carriers and perovskite crystal growth and thereby enhances device performance and operational stability. Here, we review the development of the varieties of carbon-based nanomaterials applications in PSCs, such as hole-transporting layers(HTLs), electron-transporting layers(ETLs), perovskite bulk layer, and their ***, we proposed a further suggestion about the optimized preparation conditions for the preparation of PSCs, which may inspire the researcher to discover, design,and manufacture the more efficient perovskite solar cells in academic and industry.

关键词： Carbon-based nanomaterials Perovskite solar cells Stability Efficiency

Highly sensitive and stable β-Ga_(2)O_(3) DUV phototransistor with local back-gate structure and its neuromorphic application

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Nano Research 2022年第10期15卷 9359-9367页

作者： Xiao-Xi Li Guang Zeng Yu-Chun Li Qiu-Jun Yu Meng-yang Liu Li-Yuan Zhu Wenjun Liu ying-guo yang David Wei Zhang Hong-Liang Lu State Key Laboratory of ASIC and System Shanghai Institute of Intelligent Electronics&SystemsSchool of MicroelectronicsFudan UniversityShanghai 200433China Shanghai Synchrotron Radiation Facility(SSRF) Zhangjiang LabShanghai Advanced Research Institute&Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201204China

Deep ultraviolet(DUV)phototransistors are key integral of optoelectronics bearing a wide spectrum of applications in flame sensor,military detector,oil spill detection,biological sensor,and artificial intelligence *** order to further improve the responsivity of UV photodetectors based onβ-Ga_(2)O_(3),in present work,high-performanceβ-Ga_(2)O_(3) phototransistors with local back-gate structure were experimentally *** phototransistor shows excellent DUV photoelectrical performance with a high responsivity of 1.01×107 A/W,a high external quantum efficiency of 5.02×109%,a sensitive detectivity of 2.98×1015 Jones,and a fast rise time of 0.2 s under 250 nm ***,first-principles calculations reveal the decent stability ofβGa_(2)O_(3) nanosheet against oxidation and humidity without significant performance ***,the hexagonal boron nitride(h-BN)/β-Ga_(2)O_(3) phototransistor can behave as a photonic synapse with ultralow power consumption of~9.6 fJ per spike,which shows its potential for neuromorphic computing tasks such as facial ***β-Ga_(2)O_(3) phototransistor will provide a perspective for the next generation optoelectrical systems.

关键词： β-Ga_(2)O_(3)phototransistors local back-gate responsivity stability photonic synapse

Altered Taurine Release in Hypothalamus of Aquaporin-4 Knockout Mice

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Chemical Research in Chinese Universities 2010年第3期26卷 406-408页

作者： ZHANG Hong-guo XIAO ying-hong yang Long-fei SU Wei-heng GUAN Xin-gang WANG Yu FENG Xue-chao MA Tong-hui Membrane Channel Research Laboratory Northeast Normal University Changchun 130024 P. R. China

Taurine is concentrated in glial cells in the hypothalamus and released in an osmo-dependent manner through volume-sensitive anion channels. Released tanrine acts on glycine receptors on vasopressin neurons to control vasopressin secretion. Water channel AQP4 is abundant in astrocytes in osmosensory areas such as the supraoptic nucleus of hypothalamus. An HPLC-based method was established to quantify taurine release from isolated hypothalamus tissues in wildtype and AQP4 knockout mice. Under the basal condition, there was no difference in taurine release from AQP4^＋/＋ and AQP4^-/- hypothalamuses. Taurine release from AQP4^-/- hypothalamus under hypoosmotic stimulation was significantly lower than that from AQP4^＋/＋ mice. AQP4 expression in the glial cells of the hypothalamus may play an important role in osmoregulation oftaurine release and subsequent vasopressin secretion.

关键词： Aquaporin-4 Taurine Hypothalamus HPLC Precolumn derivatization

Coexisting ankylosing spondylitis and rheumatoid arthritis： A case report with literature review

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Chinese Medical Journal 2011年第20期124卷 3430-3432页

作者： guo ying-ying yang Li-li CUI Hua-dong ZHAO Shuai ZHANG Ning Department of Rheumatology and Immunology Shengjing Hospital of China Medical University Shenyang Liaoning 110004 China

A 30-year-old female patient with coexisting ankylosing spondylitis and rheumatoid arthritis was diagnosed and treated. The human leukocyte antigen （HLA）-B27 is a predisposing factor of ankylosing spondylitis and HLA-DR4 is a predisposing factor of rheumatoid arthritis. This patient was HLA-B27 and HLA-DR4 positive, and ankylosing spondylitis manifested before rheumatoid arthritis. After disease modifying anti-rheumatic drugs successfully arrested ankylosing spondylitis activity the patient conceived and delivered a healthy baby. One year later, she developed peripheral polyarthritis and was diagnosed with rheumatoid arthritis. We hypothesized that pregnancy may be one of the environmental factors that can activate rheumatoid arthritis, and that disease modifying anti-rheumatic drugs play an important role in keeping the disease under control.

关键词： ankylosing spondylitis disease modifying anti-rheumatic drugs rheumatoid arthritis

Smelting recrystallization of CsPbBrI_(2)perovskites for indoor and outdoor photovoltaics

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eScience 2021年第1期1卷 53-59页

作者： Kai-Li Wang ying-guo yang Yan-Hui Lou Meng Li Femi Igbari Jun-Jie Cao Jing Chen Wen-Fan yang Chong Dong Lina Li Ren-Zhong Tai Zhao-Kui Wang Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Shanghai Synchrotron Radiation Facility(SSRF) Shanghai Advanced Research InstituteShanghai Institute of Applied PhysicsChinese Academy of Sciences239 Zhangheng RoadShanghai 201204China College of Energy Soochow Institute for Energy and Materials Innovations Soochow University Suzhou 215006 China

A smelting multiple recrystallization strategy and its effects on the morphology,composition,and defects of CsPbBrI_(2)film were *** optimal number(n=2)of recrystallization cycles improved the crystallinity and phase purity,minimized the grain boundaries,and optimized the crystal structure,yielding a high-quality perovskite film with significantly reduced defects *** corresponding photovoltaic devices exhibited a champion efficiency of 16.02%under AM 1.5 G illumination and presented an even higher indoor efficiency of 33.50%under an LED(2956 K,P_(in):334.41𝜇W/cm^(2)).This recrystallization method offers a promising strategy for developing high-performance indoor and outdoor *** recrystallization in the cells was also explored to achieve enhanced stability and longer lifetime in humid conditions.

关键词： Perovskite solar cells Recrystallization Trap density Indoor Inorganic

High responsivity and flexible deep-UV phototransistor based on Ta-doped β-Ga_(2)O_(3)

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npj Flexible Electronics 2022年第1期6卷 457-465页

作者： Xiao-Xi Li Guang Zeng Yu-Chun Li Hao Zhang Zhi-Gang Ji ying-guo yang Man Luo Wei-Da Hu David Wei Zhang Hong-Liang Lu State Key Laboratory of ASIC and System Shanghai Institute of Intelligent Electronics&SystemsSchool of MicroelectronicsFudan University200433 ShanghaiChina National Key Laboratory of Science and Technology on Micro/Nano Fabrication Shanghai Jiao Tong University200240 ShanghaiChina Shanghai Synchrotron Radiation Facility(SSRF) Zhangjiang LabShanghai Advanced Research Institute&Shanghai Institute of Applied PhysicsChinese Academy of Sciences201204 ShanghaiChina State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of Sciences200083 ShanghaiChina

Deep-ultraviolet(DUV)phototransistors have shown great potential applications in UV imaging,artificial intelligence,and wearable *** a large number of wide bandgap semiconductors,the quasi-two-dimensionalβ-Ga_(2)O_(3) is considered as an ideal candidate for DUV photodetector ***,we report a high responsivity(R)and fully flexible Ta-dopedβ-Ga_(2)O_(3) DUV phototransistor which exhibits outstanding optoelectrical properties with a high R of 1.32×10^(6) A/W,a large detectivity of 5.68×10^(14) Jones,a great photo-to-dark current ratio of 1.10×10^(10)%,a high external quantum efficiency of 6.60×10^(8)%,and an ultra-fast response time of~3.50 ***,the flexible Ta-dopedβ-Ga_(2)O_(3) device also displays high reliability and mechanical flexibility that can sustain well after over 1×10^(4) bending ***,high-contrast imaging of UV light was obtained on the flexible DUV detector arrays,which can be efficiently trained and recognized by an artificial neural *** findings offer a perspective to develop wearable optoelectronics and UV imaging based on high-performance flexibleβ-Ga_(2)O_(3) DUV phototransistors,providing an inspiration for the future work in artificial intelligence and bionic robot fields.

关键词： transistor responsivity artificial