检索结果-南通市图书馆

Journal of Materials Science & Technology 2021年第5期64卷 165-175页

作者： Fandi Meng Li Liu yu cui Fuhui Wang Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang 110819China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

To realize a rapid evaluation of coating degradation under alternating hydrostatic pressure(AHP),appropriate physical models of electrochemical impedance spectroscopy(EIS)data fitting were respectively developed for epoxy coatings with and without pigments,based on their different water absorption ***-law model was selected to evaluate the anti-permeability of epoxy varnish(EV)coating,which tends to form through pores in the coating *** the other hand,two-layer model based on Young theory was developed to evaluate the anti-permeability of pigmented epoxy ***,the resistivity profile with coating thickness was calculated as a critical parameter to describe the anti-permeability of coating at different immersion *** interpretation of water diffusion dynamics based on different coating structures was also given,which is responsible for the choice of distribution models.

关键词： Organic coatings Coating resistivity Distribution models EIS Alternating hydrostatic pressure

Laryngeal myxoma: A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第12期9卷 2823-2829页

作者： Ting-Ting yu Hong yu yu cui Wei Liu Xiang-Yan cui Xin Wang Department of Otolaryngology Head and Neck SurgeryJilin UniversityChangchun 130000Jilin ProvinceChina First Operation Room Jilin UniversityChangchun 130000Jilin ProvinceChina

BACKGROUND Myxomas are benign tumors of mesenchymal origin that rarely occur in the *** SUMMARY We report a case of a laryngeal myxoma that presented as a right vocal cord mass in a 54-year-old *** Laryngeal myxoma is a rare benign tumor in the *** is difficult to distinguish glottis myxoma from vocal cord polyps on *** recommend that otolaryngologists acquire a better understanding of this *** a laryngeal myxoma is suspected,dynamic laryngoscopy,acoustic voice analysis,and pathological biopsy should be performed.

关键词： Laryngeal myxoma Mesenchymal Glottis Hoarseness Dyspnea Laryngoscopy Case report

Chemical vapor deposition growth of two-dimensional heterojunctions

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2018年第1期61卷 2-18页

作者： yu cui Bo Li JingBo Li ZhongMing Wei State Key LaboratoO' of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences & College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Beij'ing 100083 China

The properties of two-dimensional(2 D) layered materials with atom-smooth surface and special interlayer van der Waals coupling are different from those of traditional materials. Due to the absence of dangling bonds from the clean surface of 2 D layered materials, the lattice mismatch influences slightly on the growth of 2 D heterojunctions, thus providing a flexible design strategy.2 D heterojunctions have attracted extensive attention because of their excellent performance in optoelectronics, spintronics, and valleytronics. The transfer method was utilized for the fabrication of 2 D heterojunctions during the early stage of fundamental research on these materials. This method, however, has limited practical applications. Therefore, chemical vapor deposition(CVD) method was recently developed and applied for the preparation of 2 D heterojunctions. The CVD method is a naturally down-top growth strategy that yields 2 D heterojunctions with sharp interfaces. Moreover, this method effectively reduces the introduction of contaminants to the fabricated heterojunctions. Nevertheless, the CVD-growth method is sensitive to variations in growth conditions. In this review article, we attempt to provide a comprehensive overview of the influence of growth conditions on the fabrication of 2 D heterojunctions through the direct CVD method. We believe that elucidating the effects of growth conditions on the CVD method is necessary to help control and improve the efficiency of the large-scale fabrication of 2 D heterojunctions for future applications in integrated circuits.

关键词： two-dimensional materials heterojunctions chemical vapor deposition

Gain Scheduling Control of Nonlinear Shock Motion Based on Equilibrium Manifold Linearization Model

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2007年第6期20卷 481-487页

作者： cui Tao yu Daren Bao Wen Yang Yongbin College of Energy Science and Engineering Harbin Institute of Technology Harbin 150001 China

The equilibrium manifold linearization model of nonlinear shock motion is of higher accuracy and lower complexity over other models such as the small perturbation model and the piecewise-linear model. This paper analyzes the physical significance of the equilibrium manifold linearization model, and the self-feedback mechanism of shock motion is revealed. This helps to describe the stability and dynamics of shock motion. Based on the model, the paper puts forwards a gain scheduling control method for nonlinear shock motion. Simulation has shown the validity of the control scheme.

关键词： shock motion equilibrium manifold linearization gain scheduling control

Preliminary physics study of the Lead–Bismuth Eutectic spallation target for China Initiative Accelerator-Driven System

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2016年第5期27卷 215-224页

作者： Lu Zhang Yong-Wei Yang yu-cui Gao Department of Spallation Target Institute of Modern PhysicsChinese Academy of Sciences509 Nanchang RoadLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China

The Lead-Bismuth Eutectic(LBE) spallation target has been considered as one of the two alternatives for the spallation target for China Initiative Accelerator-Driven *** paper reports the preliminary study on physical feasibility of a U-type LBE target with *** simulation results based on Monte Carlo transport code MCNPX indicate that the spallation neutron yield is about 2.5 per *** maximum spallation neutron flux is observed at about 3 cm below the lowest part of the *** the LBE target is coupled with the reactor,the reactor neutrons from the fission reaction increased the neutron field *** energy deposition of highenergy protons is the main heat source;the spallation neutrons and reactor neutrons contribute only a small *** maximum energy deposition in the LBE is about 590 W/cm^3 and that in the target window is about319 W/cm^*** estimate the lifetime of the target window,we have calculated the radiation *** maximum displacement production rate in the target window is about10 dpa/*** hydrogen and helium production rates generated during normal operation were also *** analyzing the residual nucleus in the target during the steady operation,we estimated the accumulated quantities of the extreme radioactivity toxicant ^(210)Po in the LBE target *** results would be helpful for the evaluation of the target behavior and will be beneficial to the optimization of the target design work of the experimental facilities.

关键词：加速器驱动系统散裂靶学习主动性物理中国共晶中子通量铋

Entropy squeezing for a V-type three-level atom interacting with a single-mode field and passing through the amplitude damping channel with weak measurement

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第1期30卷 158-163页

作者： cui-yu Zhang Mao-Fa Fang Synergetic Innovation Center for Quantum Effects and Applications Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of EducationSchool of Physics and ElectronicsHunan Normal UniversityChangsha 410081China

The entropy squeezing of a V-type three-level atom interacting with a single-mode field and passing through the amplitude damping channel is investigated in detail. Our results show that when coupled to the single-mode field, the atom in appropriate initial states can not only generate obvious entropy squeezing but also keep in the optimal squeezing state,while passing through the amplitude damping channel, the atom can generate entropy squeezing under the control of the weak measurement. Besides, it is proved again that as a measurement method for atomic squeezing, the entropy squeezing is precise and effective. Therefore our work is instructive for experiments in preparing three-level system information resource with ultra-low quantum noise.

关键词： entropy squeezing V-type three-level atom single-mode field weak measurement

Reduction of Sensitivity to Sintering Temperature for Nd-Fe-B Magnets through Zr and Nb Additions

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2009年第5期25卷 629-632页

作者： Mi Yan Xigui cui Lianqing yu Tianyu Ma State Key Laboratory of Silicon Materials Department of Materials Science and Engineering Zhejiang University Hangzhou 310027 China

To reduce the sensitivity of grain growth to sintering temperature for improving property consistency of sintered Nd-Fe-B magnets, combined additions of Zr and Nb were investigated. It was found that when Zr content was increased to 0.07 at. pct, abnormal grain growth was effectively hindered even when the sintering temperature reached 1100℃. With combined additions of 0.07 at. pct Zr and 0.07 at. pct Nb, the sensitivity of grain growth to sintering temperature was greatly reduced consistency than the magnets containing no Zr and also improved. The magnets sintered at 1100℃ showed higher property Nb. In addition, the magnetic properties of magnets were also improved.

关键词： Sintered Nd-Fe-B magnet Magnetic properties Consistency Sintering temperature

Finite element analysis of effect of interfacial bubbles on performance of epoxy coatings under alternating hydrostatic pressure

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第5期64卷 233-240页

作者： Rui Liu Li Liu Wenliang Tian yu cui Fuhui Wang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Key Laboratory for Anisotropy and Texture of Materials(MoE) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China

The stresses around bubbles formed on a coating/substrate interface under hydrostatic pressure(HP)and alternating hydrostatic pressure(AHP)were calculated using the finite element *** results reveal that HP promotes coating failure but does not mechanically destroy the interface,whereas AHP can provide tensile stress on bubbles formed at the interface and accelerate disbonding of the *** of water resistance,a lag time exists for the coating that serves in an AHP *** coating can have a better protective performance if the lag time suits the AHP to minimize the impact of the AHP on the interface.

关键词： Finite element method Organic coatings Alternating hydrostatic pressure Interfacial bubbles Adhesion

Ga_(2)OSe monolayer:A promising hydrogen evolution photocatalyst screened from two-dimensional gallium chalcogenides and the derived janus

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2022年第5期7卷 1045-1052页

作者： yu cui Mengyuan Li Xiaoli Zhang Sufan Wang yucheng Huang College of Chemistry and Material Science Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education InstitutesThe Key Laboratory of Functional Molecular SolidsMinistry of EducationAnhui Laboratory of Molecule-Based MaterialsAnhui Normal UniversityWuhu241000China

Using first-principles calculations,hydrogen evolution reaction(HER) activity on two-dimensional(2 D) gallium chalcogenides monolayers GaX(X=O,S,Se,and Te) as well as the derived Janus monolayers Ga_(2) XY(X≠Y,X/Y=O,S,Se,and Te) were systematically *** was found that Ga_(2) OSe Janus monolayer with a 0.3% strain has the lowest ΔG_(H)*of 0.19 eV(modified to-0.01 eV including the solvation effect) because(ⅰ) O is the most electronegative among X/Y atoms,(ⅱ) the Ga_(2) OSe monolayer has a larger lattice parameter with respect to GaO monolayer,and(ⅲ) the built-in electric field is enhanced after H *** enhanced H adsorption with the lattice stretching is a result of the weaker Ga-O bond strength before H adsorption and the reduced electron fillings of anti-bonding molecular orbital formed by H 1 s and O2 p_(z) orbitals after H *** O-p_(z) band center can be served as a descriptor to describe the HER activity trend for these p-block ***,Ga_(2) OSe monolayer has appropriate band alignment,distinguished optical absorption coefficient(10~5 cm^(-1)),low exciton binding energy(0.71 eV),and the spontaneous HER process,indicating that it is a highly potential candidate for near-infrared photocatalyst for hydrogen *** research provides a novel paradigm that forming Janus structure can effectively tune the HER activity,which would guide the searching for excellent HER photocatalysts for clean hydrogen production.

关键词： monolayer catalyst adsorption

Compact bandpass filter based on two meandered parallel-coupled lines in different lengths

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2012年第3期19卷 33-36页

作者： cui Dong-nuan LIU yuan-an LI Shu-lan yu cui-ping School of Electronic Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

A new compact bandpass filter based on two meandered parallel-coupled lines of different lengths in shunt is presented, using the signal-interference technique, this filter obtains a low insertion loss and sharp rejection. A set of analytical formulas and guidelines for the design of the bandpass filter are provided in two theoretical analysis methods. According to the number of attenuation poles of the reflection coefficients in the passband, it can be summed up two types of filters. To validated this topology, two wideband bandpass filters centered at 3 GHz are built to verify the theoretical prediction, the measured frequency response of the filter agrees excellently with the predicted result.

关键词： meandered parallel-coupled lines signal-interference technique attenuation poles