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M_(φ)-type Submodules over the Bidisk

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Acta Mathematica Sinica,English Series 2021年第5期37卷 805-824页

作者： Guo zeng YANG Chang Hui WU tao YU School of Mathematics and Statistics Zhengzhou Normal UniversityZhengzhou 450044P.R.China School of Mathematical Sciences Qufu Normal UniversityQufu 273165P.R.China School of Mathematical Sciences Dalian University of TechnologyDalian 116024P.R.China

Let H^(2)(D^(2))be the Hardy space over the bidisk D^(2),and let M_(φ)=[(z-φ(w))^(2)]be the submodule generated by(z-φ(w))^(2),whereφ(w)is a function in H∞(w).The related quotient module is denoted by N_(φ)=H^(2)(D^(2))ΘM_(φ).In the present paper,we study the Fredholmness of compression operators S_(z),S_(w) on N_(φ).Whenφ(w)is a nonconstant inner function,we prove that the Beurling type theorem holds for the fringe operator F_(w) on[(z-w)^(2)]Θz[(z-w)^(2)]and the Beurling type theorem holds for the fringe operator Fz on M_(φ)ΘwM_(φ)ifφ(0)=***,we study some properties of F_(w) on[(z-w^(2))^(2)]Θz[(z-w^(2))^(2)].

关键词： Submodules Beurling type theorem compression operators Fredholmness

Wetting-drying effect on the strength and microstructure of cementphosphogypsum stabilized soils

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第3期16卷 1049-1058页

作者： Lingling zeng Xia Bian Jiaxing Weng tao Zhang College of Civil Engineering Zhejiang University of TechnologyHanzhou310014China Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai UniversityNanjing210098China State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhou221116China Jiangsu Water Source Company Ltd.of the Eastern Route of the South-to-North Water Diversion Project Nanjing210000China Power China Zhongnan Engineering Corporation Limited Changsha410027China

Phosphogypsum has often been used as an effective and environmentally friendly binder for partial replacement of cement,improving the engineering properties of slurries with high water ***,the influence of phosphogypsum on the physicomechnical properties of stabilized soil subjected to wettingedrying cycles is not well understood to *** this study,the effect of phosphogypsum on the durability of stabilized soil was studied by conducting a series of laboratory experiments,illustrating the changes in mass loss,pH value and unconfined compressive strength(qu)with wettingdrying *** test results showed that the presence of phosphogypsum significantly restrained the mass loss in the early stage(lower than the 4th cycle),which in turn led to a higher qu of stabilized soil than that without *** the 4th cycle,a sudden increase in mass loss was observed for stabilized soil with phosphogypsum,resulting in a significant drop in qu to a value lower than those without phosphogypsum at the 6th *** addition,the qu of stabilized soils correlated well with the measured soil pH irrespective of phosphogypsum content for all wettingedrying *** to the microstructure observation via scanning electron microscope(SEM)and X-ray diffraction(XRD)tests,the mechanisms relating the sudden loss of qu for the stabilized soils with phosphogypsum after the 4th wetting-drying cycle are summarized as follows:(i)the disappearance of ettringite weakening the cementation bonding effect,(ii)the generation of a larger extent of microcrack,and(iii)a lower pH value,in comparison with the stabilized soil without phosphogypsum.

关键词： Wetting-drying Phosphogypsum Microstructure Durability

The Early Mesozoic NE-SW Extensional Model and Exhumation Processes at the Southeastern Margin of the Central Asian Orogenic Belt:Insights from the Strain and Kinematic Vorticity Analysis of the Sonid Zuoqi Ductile Detachment Zone

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Acta Geologica Sinica(English Edition) 2024年第5期98卷 1141-1153页

作者： LI Jianbo SONG Zhijie LEI Hengcong zeng tao East China University of Technology Nanchang 344000China

The Sonid Zuoqi ductile detachment zone is located at the southeastern margin of the Central Asian orogenic belt(CAOB),striking EW and dipping to the *** major rock type of the Sonid Zuoqi ductile detachment zone is mylonite derived from *** sequence of mylonite features is:(1)S and C foliations of mylonite,and(2)extensional crenulation cleavage(ecc)or C′and the kinematic vorticity(Wk)value changed from 0.70 to 0.95 and from 0.37 to 0.69,respectively;the strain type of the mylonites within the Sonid Zuoqi ductile detachment zone is compressional to planar *** strong deformation mylonite and Halatu plutons yielded a zircon U-Pb age of 244 Ma and a zircon(U-Th)/He age of 214 Ma,*** on the strain and kinematic vorticity analysis,together with the zircon U-Pb and zircon(U-Th)/He ages and the regional tectonic background,the study area experienced three stage evolution:tangential simpleshear(244 Ma),simple-shear-dominated general shear represented by upper crustal extension(224 Ma)and pure-shear-dominated general shear represented by the Halatu pluton doming(214 Ma),which constrained the early Mesozoic NE-SW crustal extension at the southeastern margin of the *** NE-SW extension probably originated from the postorogenic extensional collapse of the CAOB,subsequent exhumation being controlled by the far afield effects of the closure of the Mongol-Okhotsk belt.

关键词： strain simple shear pure shear kinematic vorticity ductile detachment zone

Plasmonic Gold Chip for Multiplexed Detection of Ovarian Cancer Biomarker in Urine

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Chemical Research in Chinese Universities 2022年第4期38卷 935-940页

作者： CHEN Minwen LIAO tao zeng Linsheng zeng Zhongyi YANG Qinglai WANG Guoxin WWHS Biotech.Inc. Shenzhen518000P.R.China Center for Molecular Imaging Probe Hunan Province Key Laboratory of Tumor Cellular and Molecular PathologyCancer Research InstituteSchool of Preclinical MedicineHengyang Medical SchoolUniversity of South ChinaHengyang421001P.R.China Shenzhen Traditional Chinese Medicine Hospital Shenzhen518033P.R.China

Human epididymal protein 4(HE4),carbohydrate antigen 125(CA125)and osteopontin(OPN)are three key biomarkers in detecting ovarian *** explore the diagnosis value of combined detection of these three biomarkers for ovarian cancer,we developed a multiplexed assay on a plasmonic gold(pGOLD)platform for measuring HE4,CA125 and OPN in *** receiver operator characteristic(ROC)curve was drawn,and the diagnosis values of each biomarker alone or in combination for ovarian cancer were *** the analysis to distinguish ovarian cancer from other gynecological cancers,ovarian cysts and healthy people,the sensitivities of HE4,CA125 and OPN were 72.55%,52.82%and 68.63%,the specificity values were 95.06%,87.65%and 90.12%,while the areas under the curve(AUC)were 0.85,0.75 and 0.77,*** sensitivity and specificity for combination detection of the three markers were 90.20%and 80.25%.The detection methods of HE4,CA125 and OPN based on plasma fluorescence enhanced chip showed good analytic and diagnostic performance,and provided a non-invasive method for the diagnosis of ovarian cancer.

关键词： Plasmonic gold chip Urine Ovarian cancer Multiplexed detection

Characteristics of Eddy Current Attenuation and Thickness Measurement of Metallic Plate

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Chinese Journal of Mechanical Engineering 2019年第6期32卷 92-100页

作者： Zhiwei zeng Pengcheng Ding Jiayi Li Shaoni jiao Junming Lin Yonghong Dai School of Aerospace Engineering Xiamen UniversityXiamen 361005China Work Station of Academicians Fujian Province(Eddysun)Xiamen 361008China

In eddy current testing, the law of attenuation of eddy current(EC) is of great concern. In conductive half space under the excitation of uniform magnetic field, the EC density decreases exponentially in the depth direction. However, in conductor with finite thickness tested by coil, the distribution of EC in the depth direction is more complicated. This paper studies the characteristics of EC attenuation in metallic plate of finite thickness. Simulation results show that there is an EC reflection at the bottom of plate, which changes the law of EC attenuation. A new concept, namely the equivalent attenuation coefficient, is proposed to quantify the speed of EC attenuation. The characteristics of EC attenuation are utilized to explain the nonmonotonic relation between coil voltage and plate thickness. Procedure of selecting frequency is discussed. Thereafter, measurement of plate thickness is carried out and accurate result is obtained.

关键词： Eddy current testing Attenuation of eddy current Thickness measurement Metallic plate

基于SSR标记的澜沧江流域大理茶群体遗传多样性研究

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农业生物技术学报 2025年第1期33卷 68-78页

作者：黄利超陈洪宇罗义菊陶燕蓝蓝增全西南林业大学园林园艺学院西南林业大学古茶树研究中心

大理茶(Camellia taliensis)是茶的重要野生近缘种，是茶资源的重要组成部分，研究大理茶群体的遗传多样性和亲缘关系，对科学保护和合理利用大理茶种质资源至关重要。本研究应用SSR标记技术对澜沧江流域5个州市共45份大理茶种和5份普洱... 详细信息

大理茶(Camellia taliensis)是茶的重要野生近缘种，是茶资源的重要组成部分，研究大理茶群体的遗传多样性和亲缘关系，对科学保护和合理利用大理茶种质资源至关重要。本研究应用SSR标记技术对澜沧江流域5个州市共45份大理茶种和5份普洱茶(C. sinensis var. assamica)种的种质资源进行遗传多样性和亲缘关系分析。结果显示，15对有效引物共检测到55个多态性位点，每对引物平均扩增3.67个位点；大理茶资源的平均期望杂合度(epected heterozygosity, He)为0.346；多态信息含量(polymorphism information content, PIC)变化范围是0.024～0.661，平均值为0.381；香农指数变化范围是0.067～1.321，平均值为0.669；多态性引物比例为60.0%，多态性引物占有效引物的比例为75.0%。聚类分析结果显示，澜沧江流域大理茶树种质分类与地理区域具有相关性，地理位置较远的大理茶树居群间的遗传距离较远，但居群内遗传距离较近。以上结果表明，澜沧江流域大理茶资源具有中等遗传多样性和中等丰富度。本研究为大理茶种质资源的保护开发及遗传图谱构建提供参考。

关键词：大理茶遗传多样性 SSR

A Study on the Interaction Mechanism between Thermal Radiation and Materials

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Journal of Thermal Science 2005年第3期14卷 284-288页

作者： Dehong XIA tao YU Chuangu WU Qingqing CHANG Honglei jiao Dept. of Thermal Eng. Univ. of Sci. and Tech. Beijing Beijing 100083 China

From the viewpoint of field synergy principle and dipole radiation theory, the interaction between the incident thermal radiation wave and materials is analyzed to reveal the mechanism of selective absorption of incident thermal radiation. It is shown that the frequency of the incident thermal radiation and the damping constant of damping oscillators in materials are of vital importance for the thermal radiation properties (reflectivity, absorptivity, transmissivity, etc.) of materials.

关键词： thermal radiation absorption enhancement field synergy scattering

Solid FeS lubricant: a possible alternative to MoS2 for Cu–Fe-based friction materials

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International Journal of Minerals,Metallurgy and Materials 2017年第11期24卷 1278-1283页

作者： tao Peng Qing-zhi Yan Xiao-lu Zhang Xiao-jiao Shi Laboratory of Special Ceramics and Powder Metallurgy University of Science and Technology Beijing Beijing 100083 China

Molybdenum disulfide(MoS_2) is one of the most commonly used solid lubricants for Cu–Fe-based friction materials. Nevertheless, MoS_2 reacts with metal matrices to produce metal sulfides(e.g., FeS) and Mo during sintering, and the lubricity of the composite may be related to the generation of FeS. Herein, the use of FeS as an alternative to MoS_2 for producing Cu–Fe-based friction materials was investigated. According to the reaction principle of thermodynamics, two composites—one with MoS_2(Fe–Cu–MoS_2 sample) and the other with FeS(FeS–Cu_2S–Cu–Fe–Mo sample), were prepared and their friction behaviors and mechanical properties were compared. The results showed that MoS_2 reacted with the Cu–Fe matrix to produce FeS, metallic ternary sulfides, and Mo when sintered at 1050°C. The MoS_2–Cu–Fe and FeS–Cu_2S–Cu–Fe–Mo samples thereby exhibited similar characteristics with respect to phase composition, density, hardness, and tribological behaviors. Micrographs of the worn surfaces revealed that the stable friction regime for both composites stemmed from the iron sulfides friction layers rather than from the molybdenum sulfides layers.

关键词： friction materials solid lubricants iron sulfides molybdenum sulfides

Aza-BODIPY-based phototheranostic nanoagent for tissue oxygen auto-adaptive photodynamic/photothermal complementary therapy

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Nano Research 2022年第1期15卷 716-727页

作者： Meijiao Zhao Qin zeng Xipeng Li Da Xing tao Zhang MOE Key Laboratory of Laser Life Science&Institute of Laser Life Science South China Normal UniversityGuangzhou 510631China Guangdong Provincial Key Laboratory of Laser Life Science College of BiophotonicsSouth China Normal UniversityGuangzhou 510631China

Tumor oxygen spatial heterogeneity is a critical challenge for the photodynamic inhibition of solid *** of an intelligent nanoagent to initiate optimal therapeutics according to the localized oxygen levels is an effective ***,we report an activatable nanoagent(BDP-Oxide nanoparticles(NPs))to enable the oxygen auto-adaptive photodynamic/photothermal complementaly *** the nanoagent accumulated in the tumor region,the low extracellular pH could trigger the disassociation of the nanoagent to release the phototheranostic agent,BDP-Oxide,which will subsequently afford the fluorescence imaging-guided photodynamic oxidation after it gets into the outer oxygen-rich *** with the penetration deepening in the solid tumor,furthermore,BDP-Oxide could be reduced into BDP by the cytochrome P450(CYP450)enzymes activated in the low oxygen tension regions of inner hypoxic tumors,which will switch on the photothermal and photoacoustic ***,the BDP-Oxide NPs-enabled photodynamic/photothermal complementary therapy significantly suppressed the solid tumor growth(inhibition rate of 94.8%).This work proposes an intelligent platform to address the oxygen partial pressure for the optimization of cancer phototherapeutics.

关键词： boron dipyrromethene(BODIPY) complementary therapy self-adaptive spatial heterogeneity of oxygen